担当区分：最終著者,　責任著者   記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）  

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担当区分：筆頭著者,　責任著者   記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）  

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担当区分：最終著者,　責任著者   記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）  

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担当区分：筆頭著者,　責任著者   記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）  

DOI： 10.1364/noma.2022.noth2e.3

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担当区分：最終著者,　責任著者   記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）  

DOI： 10.1364/bgppm.2022.jtu2a.24

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担当区分：最終著者,　責任著者   掲載種別：研究論文（国際会議プロシーディングス）  

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担当区分：最終著者,　責任著者   掲載種別：研究論文（国際会議プロシーディングス）  

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担当区分：最終著者,　責任著者   掲載種別：研究論文（国際会議プロシーディングス）  

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担当区分：筆頭著者,　最終著者,　責任著者   掲載種別：研究論文（国際会議プロシーディングス）  

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担当区分：筆頭著者,　責任著者   掲載種別：研究論文（国際会議プロシーディングス）  

DOI： 10.1117/12.2612479

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担当区分：最終著者,　責任著者   掲載種別：研究論文（国際会議プロシーディングス）  

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担当区分：最終著者,　責任著者   記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）  

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担当区分：責任著者   掲載種別：研究論文（学術雑誌）   出版者・発行元：The Optical Society  

DOI： 10.1364/josab.424824

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掲載種別：研究論文（学術雑誌）   出版者・発行元：Elsevier BV  

The density of dislocations that occur in the intrinsic (i-) layer of a pin diamond diode was estimated from two-photon excitation photoluminescence (2PPL) imaging. Results elucidated data obtained from device characteristic measurements and cathodoluminescence (CL). Generation and diffusion of free carriers for deep-level emission in the i-layer have no effect on emission images observed using the 2PPL method. Therefore, to evaluate the pin diode structure, the influence of free carrier propagation on the adjacent layer can be avoided. However, this effect cannot be ignored when using CL. These findings are expected to be important for assessing diamond device performance.

DOI： 10.1016/j.diamond.2021.108463

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担当区分：最終著者,　責任著者   記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）  

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担当区分：最終著者,　責任著者   記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）  

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担当区分：筆頭著者,　責任著者   記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）  

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：European Physical Society (EPS)  

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：The Optical Society (OSA)  

DOI： 10.1364/CLEOPR.2020.P3_22

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：The Optical Soceity (OSA)  

DOI： 10.1364/OME.383548

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：Center of Laser Technology and Material Science, Russian Federation (Invited)  

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：SPIE  

DOI： 10.1117/12.2508194

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：OSA  

DOI： 10.1364/BGPPM.2018.JTu5A.42

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：OSA  

DOI： 10.1364/NOMA.2018.NoM3J.5

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：OPTICAL SOC AMER  

We have succeeded in bonding a Nd: YAG crystal and an anti-reflection coated diamond crystal to realize a composite laser which minimizes the Fresnel-reflection loss at the bonded interface for the first time. This newly developed composite laser has realized higher output power at higher pump power than a non-composite Nd: YAG laser while keeping nearly the same slope efficiency. (C) 2017 Optical Society of America

DOI： 10.1364/OE.25.022797

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：Electronics and Telecommunications Research Institute  

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：European Physical Society  

DOI： 10.1109/CLEOE-EQEC.2017.8086476

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：European Physical Society  

DOI： 10.1109/CLEOE-EQEC.2017.8086275

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：OPTICAL SOC AMER  

We accurately measure the electro-optic (EO) coefficients of undoped and 1.7 mol% MgO-doped stoichiometric LiNbO3 (SLN) using high-quality crystals and a reliable AC-field applying method. The EO coefficients at the wavelength of 633 nm are determined to be r(33) = 30.2 +/- 0.6 pm/V and r13 = 9.1 +/- 0.2 pm/V for undoped SLN, and r(33) = 29.8 +/- 0.2 pm/V and r13 = 9.1 +/- 0.04 pm/V for MgO-doped SLN. The obtained values are found to be nearly the same with those for congruent LiNbO3. (C) 2017 Optical Society of America

DOI： 10.1364/OME.7.000939

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：OPTICAL SOC AMER  

Using the room-temperature-bonding technique, we have succeeded in fabricating a quasi-phase matching stack of thirty 106 mu m-thick and 5.5 x 5.0 mm-aperture GaAs plates for high-power second-harmonic generation of CO2 lasers with the wavelength of 10.6 mu m. Although its transmittance was lower than that of a single GaAs plate because of inclusion of small particles in the bonded interface, newly fabricated twenty stacked GaAs plates with the improved process show nearly the same transmittance with that of a single plate. (C) 2017 Optical Society of America

DOI： 10.1364/OME.7.000932

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：IEEE  

Dual-comb spectroscopy (DCS) is a new Fourier spectroscopic method which realizes precise and rapid spectral detection with a broad bandwidth. In this study, we applied DCS to characterization of birefringence of anisotropic materials. As a demonstration, we evaluated the refractive index and the birefringence of an anisotropic crystal, Nd:YVO4. We confirmed the evaluated values were consistent to some reference data, and our proposed scheme was successfully performed as the precise and rapid characterization method of the birefringence. It is expected that this technique will become a useful tool in a wide range of applications such as laser developments.

DOI： 10.1109/CLEOPR.2017.8118827

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：IEEE  

We have directly bonded a laser crystal and a copper block without an indium sheet using the room-temperature-bonding technique to develop more effective and reliable holder structures for high-power solid-state lasers. Moreover, a new structure with a copper foil between a laser crystal and a copper block has been fabricated to realize more cohesive bonding.

DOI： 10.1109/CLEOPR.2017.8118753

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：IEEE  

We accurately measure the electro-optic coefficients of MgO-doped and undoped congruent and stoichiometric LiNbO3 using high-quality crystal and a reliable AC-field applying method. The obtained values of r(33) and r(13) at 633 nm are found to be nearly the same for the four materials, respectively, within the experimental accuracy.

DOI： 10.1109/CLEOPR.2017.8118808

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：OSA - The Optical Society  

Using the room-temperature bonding, we have succeeded in fabricating a quasi-phasematching stack of GaAs plates with low loss. The SHG efficiency is found to be nearly the same within the whole aperture of the device.

DOI： 10.1364/ASSL.2017.JM5A.4

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：OSA - The Optical Society  

We have fabricated walk-off compensating BBO devices with increased number of thinner plates using the room-temperature-bonding technique, and found key points for realizing high wavelength-conversion efficiency.

DOI： 10.1364/ASSL.2017.JM5A.11

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：IEEE  

We accurately measure the electro-optic coefficients of MgO-doped and undoped congruent and stoichiometric LiNbO3 using high-quality crystal and a reliable AC-field applying method. The obtained values of r(33) and r(13) at 633 nm are found to be nearly the same for the four materials, respectively, within the experimental accuracy.

DOI： 10.1364/ASSL.2016.AM5A.25

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：IEEE  

We accurately measure the electro-optic coefficients of MgO-doped and undoped congruent and stoichiometric LiNbO3 using high-quality crystal and a reliable AC-field applying method. The obtained values of r(33) and r(13) at 633 nm are found to be nearly the same for the four materials, respectively, within the experimental accuracy.

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：The Optical Society  

DOI： 10.1364/ASSL.2016.AW3A.3

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：The Optical Society  

DOI： 10.1364/ASSL.2016.ATu5A.6

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DOI： 10.1063/1.4955335

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：Institute of Electrical and Electronics Engineers Inc.  

We have succeeded in deriving accurate and simple Sellmeier equations for stoichiometric LiNbO3 and LiTaO3 available from visible to mid-IR region, based on the direct measurements of refractive indices and previously reported OPO experiments.

DOI： 10.1109/CLEOPR.2015.7376312

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：Institute of Electrical and Electronics Engineers Inc.  

We report improved thermal performance in the heat-removal module for stable wavelength conversion, fabricated by a new method, air-bubble reduction. The quantitative relation between focusing position, normalized conversion efficiency and effective heat capacity is investigated.

DOI： 10.1109/CLEOPR.2015.7376311

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：European Physical Society  

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：AMER INST PHYSICS  

The refractive index of a potassium dihydrogen phosphate (KDP) crystal strongly depends on the deuteration fraction of the crystal. The wavelength dependence of the phase-matching angle in the near-infrared optical parametric process shows convex and concave characteristics for pure KDP and pure deuterated KDP (DKDP), respectively, when pumped by the second harmonic of Nd- or Yb-doped solid state lasers. Using these characteristics, ultra-broadband phase matching can be realized by optimization of the deuteration fraction. The refractive index of DKDP that was grown with a different deuteration fraction (known as partially deuterated KDP or pDKDP) was measured over a wide wavelength range of 0.4-1.5 mu m by the minimum deviation method. The wavelength dispersions of the measured refractive indices were fitted using a modified Sellmeier equation, and the deuteration fraction dependence was analyzed using the Lorentz-Lorenz equation. The wavelength-dependent phase-matching angle for an arbitrary deuteration fraction was then calculated for optical parametric amplification with pumping at a wavelength of 526.5 nm. The results revealed that a refractive index database with precision of more than 2 x 10(-5) was necessary for exact evaluation of the phase-matching condition. An ultra-broad gain bandwidth of up to 490 nm will be feasible when using the 68% pDKDP crystal. (C) 2015 AIP Publishing LLC.

DOI： 10.1063/1.4913298

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：Optical Society of America (OSA)  

We have developed Nd:YAG/diamond and Nd:YVO4/diamond composites using the room-temperature-bonding technique. Higher-power operation at higher pump power is possible for the composites than for non-composites, in spite of the Fresnel loss at the bonded interfaces.

DOI： 10.1364/ASSL.2015.ATh2A.14

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：OPTICAL SOC AMER  

We analyze a solution of the heat equation for second harmonic generation (SHG) with a focused Gaussian beam and simulate the temperature rise in SHG materials as a function of the second harmonic power and the focusing conditions. We also propose a quantitative value of the heat removal performance of SHG devices, referred to as the effective heat capacity C-alpha in phase matched calorimetry. We demonstrate the inverse relation between C-alpha and the focusing parameter xi, and propose the universal quantity of the product of C-alpha and xi for characterizing the thermal property of SHG devices. Finally, we discuss the strategy to manage thermal dephasing in SHG using the results from simulations. (C) 2014 Optical Society of America

DOI： 10.1364/OE.22.018268

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：OPTICAL SOC AMER  

We directly measured phase-matching directions of second harmonic, sum, and difference frequency generations in the Langatate La3Ga5.5Ta0.5O14 (LGT) uniaxial crystal. The simultaneous fit of the data enabled us to refine the Sellmeier equations of the ordinary and extraordinary principal refractive indices over the entire transparency range of the crystal, and to calculate the phase-matching curves and efficiencies of LGT for infrared optical parametric generation. (C) 2014 Optical Society of America

DOI： 10.1364/OL.39.004033

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：OSA (The Optical Society)  

DOI： 10.1364/OE.22.012829

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：IEEE  

We develop composite solid-state lasers and nonlinear wavelength-conversion devices by room-temperature bonding. The room-temperature-bonding technique has a potential of realizing new high-power and highly efficient laser devices over a wide wavelength range. (C) 2014 Optical Society of America

DOI： 10.1364/CLEO_SI.2014.STu1I.3

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：IEEE  

We have developed new structured wavelength-conversion devices with stacked plates of beta-BaB2O4 using the room-temperature bonding technique. The output beam quality is improved, while the generated UV power becomes lower when thinner plates are used.

DOI： 10.1109/LTB-3D.2014.6886158

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：The Optical Society (OSA)  

DOI： 10.1364/ASSL.2013.ATu2A.4

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：The Optical Society (OSA)  

DOI： 10.1364/NLO.2013.NTu3B.1

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：The Optical Society (OSA)  

DOI： 10.1364/NLO.2013.NM1A.3

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：JAPAN SOC APPLIED PHYSICS  

Mg-doped stoichiometric lithium tantalate (SLT) is a promising material in high power generation, due to its high thermal conductivity. The accuracy of the temperature-dependent Sellmeier equation for Mg-doped SLT is important for designing high-power-frequency converters. We propose a temperature-dependent Sellmeier equation for the extraordinary refractive index of 1.0 mol % Mg-doped SLT. The equation is fitted with measured data in the first-order quasi-phase-matched (QPM) second harmonic generation (SHG) and optical parametric oscillation (OPO) with the fundamental and pump wavelengths being both 1.064 mu m and previously published data [Jpn. J. Appl. Phys. 41 (2002) 465] of SLT. The equation allows us to predict accurate QPM periods in the range of 0.5-4 mu m wavelength and in temperature range of 30-170 degrees C. (c) 2013 The Japan Society of Applied Physics

DOI： 10.7567/JJAP.52.032601

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：AMER ASSOC NEUROLOGICAL SURGEONS  

Object. The CSF shunt valve is a medical device whose main function is to regulate intracranial pressure and drain excess CSF. The authors have developed a new therapeutic method for treating hydrocephalus, namely the tandem shunt valve system, which has the potential of flexibly controlling the CSF flow rate and intracranial pressure in patients.
Methods. The properties of the tandem system were verified by performing in vitro experiments. An in vitro system with a manometer was built to measure pressure and flow rates of water in open systems using the Codman Hakim Programmable Valve and the Strata adjustable pressure programmable valve. A single valve and 2 single shunt valves connected in series (the tandem shunt valve system) were connected to the manometer to check the final pressure.
Results. Conventional single shunt valve systems require valve pressures to be set higher to slow down the CSF flow rate, which inevitably results in a higher final pressure. On the other hand, the tandem shunt valve system uses the combination of 2 valves to slow the CSF flow rate without increasing the final pressure.
Conclusions. The authors succeeded in experimentally demonstrating in vitro results of tandem systems and their effectiveness by applying a model to show that the valve with the higher pressure setting determined the final pressure of the entire system and the flow rate became slower than single shunt valve systems. (http://thejns.org/doi/abs/10.3171/2012.10.PEDS12226)

DOI： 10.3171/2012.10.PEDS12226

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記述言語：英語   掲載種別：研究論文（その他学術会議資料等）  

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：IEEE  

We present thermal effects in single pass CW SHG with focused Gaussian beams. Thermal dephasing and lensing effects depending on the SH power are demonstrated with the calculated temperature change in PPMgSLT crystals.

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：IEEE  

Thermal management is discussed in single-pass CW SHG in QPM Mg:SLT. Effective heat capacity in four-side heat removal module is quantitatively characterized by Phase-Matched Calorimetry and enhanced by 50% with narrowing device width.

DOI： 10.1109/CLEOPR.2013.6600157

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：IEEE  

We have proposed and fabricated high-index-contrast AlGaAs/Alox waveguides with inversion-stacked core structure for higher-order modal-phase-matched second-harmonic generation at 1.55 mu m.

DOI： 10.1109/CLEOPR.2013.6600158

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：IEEE  

DOI： 10.1109/CLEOE-IQEC.2013.6800963

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：IEEE  

We have developed composite lasers and nonlinear frequency-conversion devices using the room-temperature-bonding technology, which has a potential of realizing new high-power and highly efficient laser devices over a wide wavelength range.

DOI： 10.1109/CLEOPR.2013.6600151

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記述言語：日本語   掲載種別：研究論文（学術雑誌）   出版者・発行元：レーザ加工学会  

CiNii Books

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：OPTICAL SOC AMER  

We have determined all the three independent components of quadratic nonlinear-optical coefficients of ZnO by highly accurate Maker-fringe measurements on high-quality bulk samples combined with theoretical analyses taking account of the multiple-reflection effects. The obtained values of quadratic nonlinear-optical coefficients are d(31) = 2.0 +/- 0.1 pm/V, d(15) = 2.1 +/- 0.1 pm/V, and d(33) = -6.2 +/- 0.3 pm/V at the fundamental wavelength of 1.06 mu m. This shows that the ratio d(33)/d(31), which is estimated to be -3.0, is deviated from the widely used value of -2 predicted for idealized wurtzite crystal. (c) 2012 Optical Society of America

DOI： 10.1364/JOSAB.29.002392

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：応用物理学会  

DOI： 10.1143/APEX.5.052201

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：Research committee of 3D Integration by Low-temperature Bonding  

We have developed a new structured wavelength-conversion device with stacked plates of β-BaB 2O 4 using the room-temperature-bonding technique. It generates higher ultraviolet power and improves the output beam quality compared with the conventional devices. © 2012 IEEE.

DOI： 10.1109/LTB-3D.2012.6238060

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：OPTICAL SOC AMER  

We proposed a method to determine device quality in heat removal. Temperature change depending on SH power was analyzed by fitting with a new model to characterize heat removal performance of SHG modules, named as phase-matched calorimetry (PMC). The thermal disposal performance of SHG devices was improved by combination of metal housing and reduced crystal aperture. With a tight aperture, we demonstrated a 19 W single-pass 532-nm SHG at a conversion efficiency of 26.5% in a 10-mm-long PPMgSLT crystal without saturation. (C)2011 Optical Society of America

DOI： 10.1364/OE.19.022588

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：Optical Society of America  

DOI： 10.1364/NLO.2011.NMA5

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記述言語：日本語   掲載種別：研究論文（学術雑誌）   出版者・発行元：レーザー学会  

We apply the room-temperature-bonding (RTB) technique to develop new sophisticated laser devices in

DOI： 10.2184/lsj.39.337

CiNii Books

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Optical Society of America  

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記述言語：日本語   出版者・発行元：レーザ協会  

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：The Optical Society (OSA)  

Stoichiometric LiNbO3 (SLN) and LiTaO3 (SLT), the high-quality crystals of which have been recently grown, are intensively investigated as next-generation nonlinear-optical materials because they have several superior properties to conventional congruent LiNbO3 (CLN) and LiTaO3 (CLT). However, the refractive indices of SLN and SLT, which are essential for accurately designing and evaluating nonlinear-optical devices, have been measured only with an accuracy of 103. In this paper, we report on the measurements of the refractive indices of undoped and Mg-doped SLN and SLT with an accuracy of better than 1104 at the wavelengths from 398 to 1064 nm by using the minimum deviation method [1]. © 2011 IEEE.

DOI： 10.1109/CLEOE.2011.5942845

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：European Physical Society  

Stoichiometric LiNbO3 (SLN) and LiTaO3 (SLT), the high-quality crystals of which have been recently grown, are intensively investigated as next-generation nonlinear-optical materials because they have several superior properties to conventional congruent LiNbO3 (CLN) and LiTaO3 (CLT). However, the refractive indices of SLN and SLT, which are essential for accurately designing and evaluating nonlinear-optical devices, have been measured only with an accuracy of 103. In this paper, we report on the measurements of the refractive indices of undoped and Mg-doped SLN and SLT with an accuracy of better than 1104 at the wavelengths from 398 to 1064 nm by using the minimum deviation method [1]. © 2011 IEEE.

DOI： 10.1109/CLEOE.2011.5942845

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：Australian Optical Society  

Stoichiometric LiNbO3 (SLN) and LiTaO3 (SLT), the high-quality crystals of which have been recently grown, are intensively investigated as next-generation nonlinear-optical materials because they have several superior properties to conventional congruent LiNbO3 (CLN) and LiTaO3 (CLT). However, the refractive indices of SLN and SLT, which are essential for accurately designing and evaluating nonlinear-optical devices, have been measured only with an accuracy of 103. In this paper, we report on the measurements of the refractive indices of undoped and Mg-doped SLN and SLT with an accuracy of better than 1104 at the wavelengths from 398 to 1064 nm by using the minimum deviation method [1]. © 2011 IEEE.

DOI： 10.1109/CLEOE.2011.5942845

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：OPTICAL SOC AMER  

We have determined all the three independent components of quadratic nonlinear-optical coefficients of GaN by highly accurate Maker-fringe measurements on high-quality bulk samples combined with theoretical analysis taking account of the multiple-reflection effects in slightly misoriented optically anisotropic samples. Especially, the d(33) coefficient is determined with sufficient accuracies for the first time, to our knowledge, by using (11 (2) over bar0)-oriented samples. The obtained values of quadratic nonlinear-optical coefficients are d(31) =2.5 +/- 0.1 pm/V, d(15)=2.5 +/- 0.1 pm/V, and d(33)=-3.8 +/- 0.2 pm/V at the fundamental wavelength of 1.064 mu m. (C) 2010 Optical Society of America

DOI： 10.1364/JOSAB.27.002026

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：Optical Society of America  

DOI： 10.1364/CLEO.2010.CThH2

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：OPTICAL SOC AMER  

The second-order nonlinear optical coefficients of 4H-SiC and 6H-SiC have been measured by use of two second-harmonic generation methods, the rotational Maker-fringe and wedge techniques, at the fundamental wavelength of 1.064 mu m. Measurements on high-quality (0001) and (11 (2) over bar0) plane samples as well as rigorous analyses taking into account the multiple-reflection effects allowed us to accurately determine the magnitudes of the nonlinear optical coefficients. The obtained values are d(31) = 6.7 pm/V, d(15) = 6.5 pm/V, and d(33) = -12.5 pm/V for 6H-SiC; and d(31) = 6.5 pm/V, d(15) = 6.7 pm/V, and d(33) = -11.7 pm/V for 4H-SiC. (C) 2009 Optical Society of America

DOI： 10.1364/JOSAB.26.001892

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：Optical Society of America  

DOI： 10.1364/NLO.2009.JWA14

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記述言語：日本語   掲載種別：研究論文（学術雑誌）   出版者・発行元：レーザー学会  

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：Optical Society of America  

DOI： 10.1364/ASSP.2009.TuB24

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：TRANS TECH PUBLICATIONS LTD  

Second-order nonlinear-optical coefficients of 4H and 6H-SiC have been measured with the wedge technique. Using high-quality (11-20) samples as well as performing rigorous measurements and analyses, the three independent components, d(31) (=d(32)) d(15) (=d(24)), and d(33), have been accurately determined. We have found that the nonlinear-optical coefficients are nearly the same between the measured 4H and 6H-SiC samples within the experimental accuracy; d(31) = 5.4 pm/V, d(15) = 6.2 pm/V, and d(33) = 9.7 pm/V.

DOI： 10.4028/www.scientific.net/MSF.615-617.315

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：IEEE  

We accurately measured the electro-optic coefficient r(33) of Final-quality undoped stoichiometnc LiNbO(3) by use of the modulated Mach-Zehnder interferometric method The obtained r(33) value is nearly the same with that of congruent LiNbO(3)

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記述言語：日本語   掲載種別：研究論文（学術雑誌）   出版者・発行元：レーザ加工学会  

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：OPTICAL SOC AMER  

What we believe to be a new mathematical procedure has been proposed for analyzing the rotational Maker-fringe data taking account of the effects of multiple reflections and interferences of the fundamental and second-harmonic beams in anisotropic plane-parallel plates. In the present formalisms partial overlaps of the fundamental and second-harmonic beams are fully included. A comparison between numerical simulations based on the proposed formalisms and experimental data obtained for a high-quality (0001) plane-parallel plate of 6H-SiC revealed the validity of our theory. We have determined the magnitudes of the nonlinear optical coefficients of 6H-SiC as d(31)=d(32)=6.7 +/- 0.8 pm/V, d(15)=d(24)=6.4 +/- 1.1 pm/V, and d(33)=-9.7 +/- 8.0 pm/V. (C) 2008 Optical Society of America

DOI： 10.1364/JOSAB.25.001616

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：Japan Society of Applied Physics  

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：Optical Society of America  

DOI： 10.1364/NLO.2007.WE30

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：Optical Society of America  

DOI： 10.1364/NLO.2007.WE25

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：ELSEVIER SCIENCE BV  

Thermally-induced-birefringence effects of Nd:YAG ceramic lasers are accurately measured. Depolarization for the ceramics is found to be nearly the same with that for (111)-cut single crystals if Nd3+ concentration is the same. Under non-lasing condition, the thermally-induced birefringence becomes larger as Nd3+ Concentration increases due to severer quenching. Under lasing, however, depolarization is measured to be one-third of that under non-lasing because the stimulated emission reduces the nonradiative process, which decreases the thermal load. Moreover, direct pumping into the emitting level by use of a 885 nm pump source intrinsically reduces the heat generation compared with the conventional 808 nm pumping; we have experimentally verified that the depolarization and the thermal load are reduced by 30% by the direct pumping. (c) 2006 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.optmat.2005.12.012

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：JAPAN SOC APPLIED PHYSICS  

Radiation in the wavelength range from 6.0 to 6.2 mu m, which is in a highly absorptive region of LiNbO3, was generated. A 5 mol % MgO-doped, periodically poled LiNbO3 was used as an optical parametric oscillator. The oscillator was pumped by a Nd:YAG laser with an I I ns pulse duration. The signal and idler waves generated were focused on another periodically poled LiNbO3 for difference frequency generation. The maximum pulse energy obtained was 0.21 mu J at 6.05 mu m.

DOI： 10.1143/JJAP.45.111

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：Optical Society of America  

We generated mid-IR laser in absorptive wavelength region around 6.1 μm by combining QPM OPO and extra-cavity QPM DFG. The emission wavelength in OPO deviated from the prediction by reported Sellmeier equation in Mg:LN. © 2005 Optical Society of America.

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：Optical Society of America  

Second-order nonlinear-optical coefficients of undoped and MgO-doped near-stoichiometric LiNbO3 are measured at the fundamental wavelength of 1.31 μm. The values are found to be nearly same with those of congruent LiNbO3 within the experimental accuracy. © 2005 Optical Society of America.

DOI： 10.1109/CLEO.2006.4628117

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：Optical Society of America  

Second-order nonlinear-optical coefficients of undoped and MgO-doped near-stoichiometric LiNbO3 are measured at the fundamental wavelength of 1.31 μm. The values are found to be nearly same with those of congruent LiNbO3 within the experimental accuracy. © 2005 Optical Society of America.

DOI： 10.1109/CLEO.2006.4628117

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：KOREAN PHYSICAL SOC  

Signal and idler wave spectra from an optical parametric oscillator were analyzed. Quasi phase matching in 5 mol.% MgO-doped periodically poled lithium niobate was used to generate infrared radiation. The dependences of the wavelengths of the signal and idler waves on the grating period and the temperature were precisely measured. The wavelengths of the signal and the idler waves deviated considerably from the predictions of Sellmeier equation, especially near the degenerate point.

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：OPTICAL SOC AMER  

We have demonstrated high-energy quasi-phase-matched optical parametric oscillation in a 3-mm-thick periodically poled 5-mol. % MgO-doped LiNbO3 device with a 32.1-mum grating period and a 30-mm length. With a large-spot-size pump laser of 2.2-mm diameter, we obtained a total output pulse energy of 22 mJ for both the signal (wavelength 1.82 mum) and the idler (2.56 mum) waves at an input pump energy of 46 mJ. (C) 2004 Optical Society of America.

DOI： 10.1364/OL.29.002527

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：ELSEVIER SCI LTD  

A continuous-wave high-power Nd:YAG laser operating on the F-4(3/2) --> I-4(9/2) transition at 946 nm and intracavity frequency-doubled to 473 nm by a KNbO3 nonlinear crystal at room temperature is reported. The Nd:YAG laser outputs a randomly polarized beam of 3.8 W maximum power (38% optical-to-optical efficiency and 44% slope efficiency with respect to the absorbed pump power) at the 946 nm fundamental wavelength. Intracavity frequency-doubling with a 2.0-mm thick KNbO3 crystal in a linear resonator yielded 159-mW single-ended blue-output with 4.8% optical-to-optical conversion efficiency versus the absorbed pump power. The 473-nm maximum power of 418 mW with 11.6% optical-to-optical conversion efficiency in absorbed power was obtained from a V-type resonator; the overall optical-to-optical conversion efficiency was 6.7%, while the conversion of the available infrared power reached 50%. (C) 2004 Elsevier Ltd. All rights reserved.

DOI： 10.1016/j.optlastec.2004.01.012

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：OPTICAL SOC AMER  

This work reports on a beam quality and dynamic behaviors of a mirror-coated highly-doped YAG (Y3Al5O12) microchip ceramic laser possessing an increased number of grain boundaries. The degradation of beam quality factor in transverse patterns due to spatial inhomogeneity across the beam, multiple split-mode operations, violation of antiphase dynamics and high-speed intensity modulations due to the interference between non-orthogonal transverse modes were observed in a laser-diode end-pumping scheme. (C) 2004 Optical Society of America.

DOI： 10.1364/OPEX.12.002293

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：The ceramic Society of Japan  

DOI： 10.14852/jcersjsuppl.112.0.S313.0

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：Optical Society of America  

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：Optical Society of America  

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：OPTICAL SOC AMER  

Continuous-wave high-power green light generation at room temperature is reported in a single-pass frequency-doubling configuration with bulk periodically poled MgO:LiNbO3 crystal placed outside a diode end-pumped Nd:GdVO4 laser. The MgO:LiNbO3 samples of 6.95-mum domain period, uniform periodicity, and 50% duty cycle along the entire crystal length are fabricated by use of a high-voltage multipulse poling method. A maximum power of 1.18 W at 531 nm with 16.8% conversion efficiency is obtained from a 2-mm-thick, 25-mm-long MgO:LiNbO3 crystal; the corresponding internal green power and conversion efficiency are 1.38 W and 19.6%, respectively, whereas the normalized conversion efficiency is 3.3%/W. (C) 2004 Optical Society of America.

DOI： 10.1364/OL.29.000830

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：Optical Society of America  

DOI： 10.1364/ASSP.2004.415

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：Optical Society of America  

DOI： 10.1364/ASSP.2004.319

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：SPIE-INT SOC OPTICAL ENGINEERING  

A diode end-pumped Nd:YAG laser passively Q-switched by Cr4+:YAG saturable absorber and intracavity frequency-doubled by a LBO nonlinear crystal is described. Using a linear cavity the maximum average power at 1.06-mum fundamental wavelength was 3.3 W, 22.5 kHz repetition rate and 25.2-ns pulses duration. The maximum peak power was 12 kW for an average power of 1.8 W, laser pulses of 17.5-ns duration and 209.3-muJ energy. Intracavity frequency-doubling employing a V-type laser resonator yielded 532-nm green pulses of 226-muJ energy and 86-ns width at 4.2-kHz rate of repetition. The theoretical calculations based on a model of rate of equations show good agreement with the experiments at both fundamental and second-harmonic wavelengths.

DOI： 10.1117/12.582805

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：SPIE-INT SOC OPTICAL ENGINEERING  

High power blue radiation obtained by intracavity frequency-doubling of a continuous wave diode end-pumped Nd:YAG laser operating on the F-4(3/2) --> I-4(9/2) transition is reported. The maximum output power for the randomly polarized beam at 946 nm was 3.7 W for 9.5 W absorbed pump power at 808 nm; the slope efficiency with respect to the absorbed pump power was 44%. For the polarized fundamental radiation the maximum power was 1.1 W (26% optical-to-optical efficiency with respect to the absorbed power), the laser operating with 38% slope efficiency. Intracavity frequency-doubling by a 2.0-mm thick KNbO3 crystal placed in a linear resonator yielded 159-mW single-ended blue-output with optical conversion efficiency versus the absorbed pump power of 4.8%. Using a V-type resonator increased the blue power at 418 mW with 11.6% optical conversion efficiency in absorbed power; the laser optical conversion efficiency was 6.7%, while the conversion of the available infrared power reached 50%.

DOI： 10.1117/12.582806

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：Optical Society of America  

Continuous-wave high-power green generation at room temperature is reported in a single-pass frequency-doubling configuration with bulk periodically polled MgO:LiNbO3, placed outside of a diode end-pumped Nd:GdVO4 laser. Maximum power of 1.18 W at 531 nm with 16.8% conversion efficiency was obtained from a 2-mm-thick, 25-mm long MgO:LiNbO3; the corresponding internal green power and conversion efficiency were 1.38 W and 19.6%, respectively. By sum frequency of the fundamental and green radiations in a second periodically polled MgO:LiNbO3 sample, 47 mW of ultraviolet light at 355 nm resulted; the normalized conversion efficiency was 1.2%/W.

DOI： 10.1364/assp.2004.196

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：Optical Society of America  

A 3-mm-thick, periodically poled 5-mol%-MgO:LiNbO3 device was fabricated for high energy optical parametric oscillation. Total energy of 22 ml for both 1.82-μm-signal and 2.56-μm-idler was obtained at input pump energy of 46 mJ. © 2003 Optical Society of America.

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：AMER INST PHYSICS  

Continuous-wave power of 189 mW at 473 nm with 49% conversion efficiency is generated from a 8.5 mm long uncoated periodically polled MgO:LiNbO3 ridge-type waveguide by frequency doubling of a diode end-pumped Nd:Y3Al5O12 laser at room temperature; the corresponding internal blue power and conversion efficiency were 222 mW and 58%, respectively. The highest conversion efficiency of 63% (74% with respect to the blue internal power) was obtained from a 12 mm long waveguide with 99 mW blue output power. Saturation of output blue power was observed for coupled fundamental power into the waveguides in excess of 200 mW. (C) 2003 American Institute of Physics.

DOI： 10.1063/1.1623938

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：INST PURE APPLIED PHYSICS  

Continuous-wave power of 0.89 W at 531 nm with 14.3% conversion efficiency is reported at room temperature from a 2-mm-thick periodically polled uncoated MgO:LiNbO3 by single-pass frequency doubling of a diode end-pumped Nd:GdVO4 laser; the corresponding internal green power and conversion efficiency were 1.03 W and 16.5%, respectively. The MgO:LiNbO3 device of 6.95-mum domain period was fabricated by using a high-voltage multi-pulse poling method; uniform periodicity and 50% duty cycle were obtained on the entire 10-mm-long crystal. The sample exhibited an effective nonlinear coefficient of 14pm/V (similar to88% of the ideal nonlinear coefficient), resulting in a measured normalized conversion efficiency of 2.7%/W. To the authors best knowledge this is the highest power ever obtained by quasi-phase matching process at room temperature.

DOI： 10.1143/JJAP.42.L1296

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：Optical Society of America  

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：Optical Society of America  

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：AMER INST PHYSICS  

A structure for quasi-phase matching of large cross section using 5 mol% MgO-doped LiNbO3 (MgO:LN) crystal for high-power wavelength conversion was realized. We have found that the coercive field to invert polarization of the crystal reduces drastically with elevated temperature. The coercive field reduces to 1.2 kV/mm at 250 degreesC, which is about 1/4 compared with that for MgO:LN at room temperature (RT) and about 1/17 of that for LN at RT. 3 mm thick periodically poled MgO:LN has been fabricated with 30 mum period. (C) 2003 American Institute of Physics.

DOI： 10.1063/1.1582371

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：Optical Society of America  

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：Optical Society of America  

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：Optical Society of America  

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：Optical Society of America  

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：Optical Society of America  

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：Optical Society of America  

DOI： 10.1364/ASSP.2003.444

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：Optical Society of America  

DOI： 10.1364/ASSP.2003.248

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：Optical Society of America  

DOI： 10.1364/ASSP.2003.388

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：Optical Society of America  

Temperature dependence of coercive field was investigated in MgO-doped LiNbO3 and the field was found to be reduced to 1.2kV/mm at 250°C. Periodical structures with 30μm period was fabricated in 3mm-thick MgO-doped LiNbO3. © 2002 Optical Society of America.

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：European Physical Society  

We have investigated thermally-induced-birefringence effect in Nd:YAG ceramics and found that depolarization loss of highly Nd/sup 3+/-doped ceramics is much larger than that of conventional Nd:YAG single crystals even at the same absorbed pump power under nonlasing condition. In this paper, however, we report that drastic reduction of depolarization loss is realized in highly Nd/sup 3+/-doped YAG ceramics by laser oscillation. © 2003 IEEE.

DOI： 10.1109/CLEOE.2003.1312105

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：European Physical Society  

In this paper, we report high-power blue light generation from a periodically polled MgO:LN ridge-type waveguide using a diode end-pumped Nd:YAG laser operating at 946 nm as a fundamental source. Blue-light CW generation of 147 mW for a coupled power at 946 nm of /spl sim/418 mW was obtained.This output power at 473 nm of 147 mW obtained, indicates the potential for high-power SHG laser of the ridge-type waveguide fabricated by ultra-precision machining. © 2003 IEEE.

DOI： 10.1109/CLEOE.2003.1312125

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：European Physical Society  

In this paper, we investigate field poling characteristics and demonstrate periodical poling in 3mm-thick MgO:LN crystals. LiNbO/sub 3/ (LN) is an attractive material for quasiphase-matching (QPM) devices because of its large nonlinear coefficient. Although periodically poled LN (PPLN) devices can perform many kinds of wavelength conversion such as second harmonic generation, difference frequency generation and optical parametric oscillation, problems about photorefractive damage and high coercive field remain in PPLNs. MgO-doped LN (MgO:LN) has been investigated and developed because of its higher resistance to photorefractive damage and a lower coercive field than that of nondoped LN. Therefore, MgO:LN is a suitable material for large aperture QPM devices for high-power/short-pulse operation. © 2003 IEEE.

DOI： 10.1109/CLEOE.2003.1312302

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記述言語：日本語   掲載種別：研究論文（学術雑誌）   出版者・発行元：電子情報通信学会  

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：SPRINGER  

An updated absolute scale of the second-order nonlinear susceptibilities of various dielectric and semiconductor materials is presented. It is based on our recent redetermination for several important nonlinear-optical materials and the earlier reliable values. The problems that were unresolved or overlooked in earlier measurements are pointed out, and the guidelines for obtaining accurate values of the nonlinear susceptibilities are presented through the detailed description of the measurement procedure applied in our determination.

DOI： 10.1023/A:1016545417478

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：Optical Society of America  

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：AMER INST PHYSICS  

The depolarization caused by thermally induced birefringence in Y3Al5O12 lasers is intrinsically reduced without any compensation by use of rods cut in other directions than (111). Using a (110)-cut crystal, one can expect the depolarization to become less than 1/10 of that caused in a conventional (111)-cut crystal. (C) 2002 American Institute of Physics.

DOI： 10.1063/1.1475365

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：Optical Society of America  

DOI： 10.1364/ASSL.2002.WE3

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：ELSEVIER SCIENCE BV  

A tunable single-axial-mode oscillation was demonstrated in a diode-pumped 400 mum thick Yb:YAG microchip green laser with 250 mW CW output power, which emits maximum green power of 520 mW. Tuning from 515.3 to 537.7 nm (Deltalambda = 22.4 nm, Deltav = 24.4 THz) with single-axial-mode was obtained using a double quartz-birefringent filter set in a coupled cavity and an angle tuned LBO at room temperature. The tuning range meets Ar+ laser and frequency-doubled Nd:YAG laser wavelengths. This laser can be applied to high-resolution spectroscopy, holography and frequency locking with a molecular iodine filter. We succeeded in applying this laser to a wavelength-multiplexed holographic memory. (C) 2002 Elsevier Science B.V. All rights reserved.

DOI： 10.1016/S0925-3467(01)00215-4

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：OPTICAL SOC AMER  

The thermal-birefringence effect in Nd3+-doped YAG ceramics has been investigated. The amount of depolarization. induced by thermal birefringence in Nd:YAG ceramics is nearly the same as that in (111)-cut single crystals at the same Nd3+ concentration. However, depolarization becomes larger as the Nd3+ concentration increases, even at the same absorbed pump power. 2002 Optical Society of America.

DOI： 10.1364/OL.27.000234

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：OPTICAL SOC AMERICA  

The depolarization caused by thermally induced birefringence in YAG lasers is intrinsically reduced without any compensation by use of a (110)-cut crystal. The depolarization can be made smaller by more than one order than that in a (111)-cut crystal. This reduction is realized in both the side pumping of a uniformly doped disk/rod combined with an aperture or of a composite material in which the doped YAG is surrounded by the undoped YAG, and the end pumping with a focused beam.

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：Society for Optical & Quantum Electronics  

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：ELSEVIER SCIENCE BV  

The high resolution spectroscopic and emission decay properties of Nd:YAG ceramics with up to 9 at.% Nd show that no major changes from the single crystals other than those induced by the increased Nd concentration occur and indicate that these materials can be used for construction of efficient and high power lasers. The laser emission of a 3.8 at.% Nd ceramic laser component under hot band resonant pump at 885 nm with a Ti:sapphire laser is demonstrated. (C) 2001 Elsevier Science B.V. All rights reserved.

DOI： 10.1016/S0030-4018(01)01278-0

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：AMER INST PHYSICS  

The possibility of using the thermally activated optical absorption bands for a resonant pump in the emitting level of highly doped Nd laser materials is discussed. This potential is demonstrated by the continuous wave 1064 nm laser emission under 885 nm pump in concentrated (up to 6.8 at. %) Nd:YAG ceramics. (C) 2001 American Institute of Physics.

DOI： 10.1063/1.1389319

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：Optical Society of America  

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：Optical Society of America  

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：Optical Society of America  

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：Optical Society of America  

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：Optical Society of America  

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：Optical Society of America  

DOI： 10.1364/ASSL.2001.TuB9

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：Optical Society of America  

DOI： 10.1364/ASSL.2001.ME8

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：OPTICAL SOC AMERICA  

Thermal birefringence effect in Nd3+-doped YAG ceramics has been investigated. The amount of depolarization induced by thermal birefringence is nearly the same between ceramics and single crystals at the same Nd3+ concentration, whereas it becomes larger for the samples with higher Nd3+ concentrations even at the same absorbed pump power. This is mainly attributed to the fact that the fractional thermal loading increases as Nd3+ concentration becomes higher.

DOI： 10.1364/ASSL.2001.ME14

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：OPTICAL SOC AMERICA  

Up to 5.0 at.% Nd3+ doped Bi4Si3O12 single crystals were realized by the Bridgman method. The spectroscopic parameters were evaluated and found that Nd3+:Bi4Si3O12 has a large quenching parameter (3.6 at.%) and very wide bandwidth in both transition of emission (23.1 nm) and absorption (16.1 nm). These properties are suitable for diode-pumped solid state lasers.

DOI： 10.1364/ASSL.2001.MB4

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：OPTICAL SOC AMERICA  

Thermal birefringence effect in Nd3+-doped YAG ceramics has been investigated. The amount of depolarization induced by thermal birefringence is nearly the same between ceramics and single crystals at the same Nd3+ concentration, whereas it becomes larger for the samples with higher Nd3+ concentrations even at the same absorbed pump power. This is mainly attributed to the fact that the fractional thermal loading increases as Nd3+ concentration becomes higher.

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Optical Society of America (OSA)  

The second-order nonlinear-optical coefficients of CsLiB6O 10 have been absolutely determined for visible-to-ultraviolet second-harmonic wavelengths. The measurements were made by use of the wedge technique at the fundamental wavelengths of 0.532, 0.852, and 1.064 μm. The following values were obtained: d36 = 0.92 pm/V at 0.532 μm, d36 = 0.83 pm/V and d14 = 0.69 pm/V at 0,852 μm, and d36 = 0.74 pm/V at 1.064 μm. © 2001 Optical Society of America.

DOI： 10.1364/JOSAB.18.000302

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：IEEE  

Thermal birefringence effect in Nd3+-doped YAG ceramics has been investigated. The amount of depolarization induced by thermal birefringence is same between ceramics and single crystals at the same Nd3+ concentration, whereas larger for more Nd3+-doped samples.

DOI： 10.1109/CLEOPR.2001.967802

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：IEEE  

Video monitoring of periodical poling process is demonstrated in LiNbO3 using transparent liquid electrodes. The pulse-to-pulse poling is optically monitored with birefringence change under the crossed polarizers. The technique is applied to device fabrication of wavelength converters for dense wavelength-division-multiplexed optical communication.

DOI： 10.1109/CLEOPR.2001.967756

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：IEEE  

The possibility of using the hot band resonant pump in the emitting level of highly-doped Nd laser materials for construction of efficient solid state lasers is demonstrated with Nd:YAG ceramics of 3.8-at.% Nd.

DOI： 10.1109/CLEOPR.2001.967800

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：OPTICAL SOC AMERICA  

A diode-pumped Nd:YAG laser, passively Q-switched by a Cr4+:YAG saturable absorber and intra-cavity frequency-doubled by a LBO crystal is described. The device produces 532 nm pulses of 263-muJ energy and 87.8-ns width at a pulse repetition rate of 3.8 kHz. The dynamics of the pulse formation is discussed by introducing a nonlinear loss term, caused by the frequency conversion, into the coupled rate equations describing the operation of passively Q-switched lasers.

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：IEEE  

Thermal birefringence effect in Nd3+-doped YAG ceramics has been investigated. The amount of depolarization induced by thermal birefringence is same between ceramics and single crystals at the same Nd3+ concentration, whereas larger for more Nd3+-doped samples.

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：OPTICAL SOC AMERICA  

Up to 5.0 at.% Nd3+ doped Bi4Si3O12 single crystals were realized by the Bridgman method. The spectroscopic parameters were evaluated and found that Nd3+:Bi4Si3O12 has a large quenching parameter (3.6 at.%) and very wide bandwidth in both transition of emission (23.1 nm) and absorption (16.1 nm). These properties are suitable for diode-pumped solid state lasers.

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）  

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：European Physical Society  

DOI： 10.1109/CLEOE.2000.909997

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Japan Society for the Promotion Science  

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：Japan Society for the Promotion Science  

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：Japan Society for the Promotion Science  

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：AMER INST PHYSICS  

Diode-pumped laser oscillation in highly Nd3+-doped polycrystalline Y3Al5O12 (YAG) ceramics has been demonstrated. The Nd:YAG ceramics are highly transparent; the loss of a 2.3 at. % neodymium-doped ceramic is as low as that of a 0.9 at. % Nd:YAG single crystal. The high doping of Nd3+ ions realizes large pump absorption; a 6.6 at. %-doped ceramic has an absorption coefficient of 60.4 cm(-1) at 808 nm. The same concentration quenching parameter is obtained between the Nd:YAG ceramics and Nd:YAG single crystals. A laser using an 847-mu m-thick 3.4 at. % Nd:YAG ceramic as a gain medium operates at 2.3 times higher output power than the same laser with a 719-mu m-thick 0.9 at. % Nd:YAG single-crystal gain medium. (C) 2000 American Institute of Physics. [S0003-6951(00)03233-2].

DOI： 10.1063/1.1289039

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：Optical Society of America  

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：Optical Society of America  

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：ELSEVIER SCIENCE BV  

Sublattice-reversed GaAs crystals grown by the lattice-matched GaAs/Ge/GaAs (100) and (111) sublattice reversal epitaxy have been characterized by reflection high-energy electron diffraction and cross-sectional transmission electron microscopy. The sublattice reversal in the GaAs/Ge/GaAs (100) system has been verified to be assisted by self-annihilation of the antiphase domains generated at the GaAs/Ge interface. The sublattice reversal in the GaAs/Ge/GaAs (111) system seems to result from the unique structure of the As-terminated Ge (111) surfaces. Unusual (111) Sigma 3 grain boundaries have been observed in the sublattice-reversed GaAs(111) crystal. (C) 2000 Elsevier Science B.V. All rights reserved.

DOI： 10.1016/S1386-9477(00)00080-1

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：JAPAN J APPLIED PHYSICS  

We have demonstrated second-harmonic generation (SHG) from GaP/AIP multilayers an GaP(111)A substrates based on quasi-phase matching (QPM) for the fundamental standing wave. Theoretical calculation predicted that the SWG power increases with increasing number of GaP/AIP multilayers because of their small absorption coefficient in the spectral range of second-harmonic light, which is in contrast to the case of GaAs/AlAs QPM multilayers. In the transmission SHG measurement using a frequency-tunable Ti:Sapphire laser as a fundamental wave source, maximum SWG power was obtained at a fundamental wavelength of 990 nm from the five-pair GaP/AIP QPM multilayers. The wavelength conversion efficiency was measured to be 9.8 x 10(-10)%/W, which was smaller than the theoretical value of 6.5 x 10(-8)%/W.

DOI： 10.1143/JJAP.39.L334

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：Optical Society of America  

DOI： 10.1364/ASSL.2000.MF7

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：OPTICAL SOC AMERICA  

Diode-pumped microchip laser oscillation of highly Nd3+-doped poly-crystalline YAG ceramics has been realized. The loss of a 2.3 at. % Nd3+-doped ceramic YAG is as low as that of a 0.9 at. % Nd:YAG single crystal. Using a 3.4 at. %, Nd:YAG ceramic, 2.3 times higher microchip laser power is obtained than with a 0.9 at. % Nd:YAG single crystal.

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：OPTICAL SOC AMERICA  

We developed a tunable intracavity frequency-doubled Yb:YAG microchip laser and applied this tunable green laser to wavelength-multiplexed holographic memory, The tunable Yb:YAG green laser output a maximum power of 520 mW and a tuning range of 22.4 nm with single frequency. Moreover, we improved tuning range of fundamental oscillation and maximum tuning range of 84.5 run (lambda =1024.1similar to1108.6 nm) was obtained. Additionally, we investigate edge-pumped Yb:YAG microchip lasers to achieve high power and brightness laser performances.

DOI： 10.1364/ASSL.2000.MB1

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：OPTICAL SOC AMERICA  

We developed a tunable intracavity frequency-doubled Yb:YAG microchip laser and applied this tunable green laser to wavelength-multiplexed holographic memory, The tunable Yb:YAG green laser output a maximum power of 520 mW and a tuning range of 22.4 nm with single frequency. Moreover, we improved tuning range of fundamental oscillation and maximum tuning range of 84.5 run (lambda =1024.1similar to1108.6 nm) was obtained. Additionally, we investigate edge-pumped Yb:YAG microchip lasers to achieve high power and brightness laser performances.

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：JAPAN J APPLIED PHYSICS  

Sublattice reversal epitaxy is demonstrated in lattice-matched GaAs/Ge/GaAs (100) and (111) systems using molecular beam epitaxy, and confirmed by reflection high energy electron diffraction and preferential etching. In the GaAs/Gc/GaAs (100) system, the sublattice reversal is assisted by self-annihilation of the antiphase domains generated at the GaAs/Ge interface. In the GaAs/Ge/GaAs (111) system, the sublattice reversal results from the unique structure of the As-terminated Ge (111) surfaces. The quality of the sublattice-reversed GaAs crystal is investigated using cross-sectional transmission electron microscopy. A method to fabricate a periodically domain-inverted structure using sublattice reversal epitaxy is demonstrated for the GaAs/Ge/GaAs (100) system.

DOI： 10.1143/JJAP.38.L508

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Optical Society of America  

DOI： 10.1364/JOSAB.16.000620

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：Institute of Electrical and Electronics Engineers Inc.  

Optical data storage in volume holograms has been an exciting prospect for high data storage technology since the digital volume holographic storage system was demonstrated. Angle and wavelength-multiplexed recordings have excellent potential for a large storage capacity. Recently we developed a diode-pumped single-frequency and tunable Yb:YAG microchip laser. We demonstrate the angle and wavelength multiplexed recording by using the tunable intracavity frequency-doubled Yb:YAG green laser.

DOI： 10.1109/CLEOPR.1999.814723

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：OPTICAL SOC AMER  

The absolute scale of the second-order nonlinear-optical coefficients of several important nonlinear-optical materials has been obtained with improved accuracy. Second-harmonic generation, parametric fluorescence, and difference-frequency generation measurements have been made at several wavelengths in the near-infrared region. The second-harmonic generation measurement was performed at the fundamental wavelengths of 1.548, 1.533, 1.313, 1.064, and 0.852 mu m. The materials measured included congruent LiNbO3, 1%MgO:LiNbO3, 5%MgO:LiNbO3, LiTaO3, KNbO3, KTiOPO4, KH2PO4, quartz, GaAs, GaP, alpha-ZnS, CdS, ZnSe, and CdTe. We made the parametric fluorescence measurement to determine the nonlinear-optical coefficients of congruent LiNbO3 and 5%MgO:LiNbO3 at pump wavelengths of 0.532 and 0.488 mu m. We made the difference-frequency generation measurement for congruent LiNbO3 at a pump wavelength of 0.532 mu m. The second-harmonic generation, parametric fluorescence, and difference-frequency generation measurements yielded consistent data on the nonlinear-optical coefficients of the materials. We found that many of the currently accepted standard values are overestimated because of neglect of the multiple-reflection effect in (nearly) plane-parallel-plate samples. The dispersion of the nonlinear-optical coefficients showed that Miller's a is barely constant over the wavelength range measured and thus that Miller's rule is not so good as other methods for wavelength scaling of the nonlinear-optical coefficients. (C) 1997 Optical Society of America.

DOI： 10.1364/JOSAB.14.002268

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記述言語：日本語   掲載種別：研究論文（学術雑誌）   出版者・発行元：日本光学会  

CiNii Books

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Optical Society of America (OSA)  

The absolute scale of the second-order nonlinear-optical coefficients of several important nonlinear-optical materials has been obtained with improved accuracy. Second-harmonic generation, parametric fluorescence, and difference-frequency generation measurements have been made at several wavelengths in the near-infrared region. The second-harmonic generation measurement was performed at the fundamental wavelengths of 1.548, 1.533, 1.313, 1.064, and 0.852 μm. The materials measured included congruent LiNbO3, 1%MgO:LiNbO3, 5%MgO:LiNbO3, LiTaO3, KNbO3, KTiOPO4, KH2PO4, quartz, GaAs, GaP, α-ZnS, CdS, ZnSe, and CdTe. We made the parametric fluorescence measurement to determine the nonlinear-optical coefficients of congruent LiNbO3 and 5%MgO:LiNbO3 at pump wavelengths of 0.532 and 0.488 μm. We made the difference-frequency generation measurement for congruent LiNbO3 at a pump wavelength of 0.532 μm. The second-harmonic generation, parametric fluorescence, and difference-frequency generation measurements yielded consistent data on the nonlinear-optical coefficients of the materials. We found that many of the currently accepted standard values are overestimated because of neglect of the multiple-reflection effect in (nearly) plane-parallel-plate samples. The dispersion of the nonlinear-optical coefficients showed that Miller's Δ is barely constant over the wavelength range measured and thus that Miller's rule is not so good as other methods for wavelength scaling of the nonlinear-optical coefficients. © 1997 Optical Society of America.

DOI： 10.1364/JOSAB.14.002268

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：Optical Society of America  

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：The Optical Society of Japan  

We have redetermined the absolute values of the nonlinear optical coefficient, d31, of LiNbO3 by parametric fluorescence and, for the first time, by difference frequency generation measurements to resolve the considerable discrepancy that existed between the values determined by second-harmonic generation (SHG) and parametric fluorescence. We obtain d31=4.8±0.5 and 4.3±0.5 pm/V at the pump wavelengths of 488 and 532 nm, respectively, in reasonable agreement with the SHG data. It appears that the previous parametric fluorescence value, d31=5.8 pm/V, was overestimated. © 1995, Japan Society of Applied Physics. All rights reserved.

DOI： 10.1007/s10043-995-0280-y

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：European Physical Society  

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：International Commission for Optics  

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全固体の半導体レーザー励起CW Nd:YAGレザーを開発し, Cr^<4+>:YAGによる可飽和吸収型受動Qスイッチ特性, さらにLBOを用いた共振器内部SHG特性について検討を行った.実験的には波長532nmで263μJ, 87.8ns, 平均出力1Wを得た.この時のパルス形成過程を可飽和吸収型Qスイッチレーザーの共振器内部に配置したSHG結晶を含めたレート方程式を解析することで求めた。

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