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Study on the Control of Thermal Birefringence in the Laser-Diode Pumped Solid-State Laser Driver

Research Project

Project/Area Number 07680541
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Nuclear fusion studies
Research InstitutionOsaka University

Principal Investigator

YAMANAKA Masanobu  Osaka University, Institute of Laser Engineering, Associate Professor, レーザー核融合研究センター, 助教授 (10029118)

Project Period (FY) 1995 – 1997
Project Status Completed (Fiscal Year 1997)
Budget Amount *help
¥2,300,000 (Direct Cost: ¥2,300,000)
Fiscal Year 1997: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1996: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1995: ¥900,000 (Direct Cost: ¥900,000)
KeywordsLaser-Diode Pumping / Solid-State Laser / Nd : YAG / Nd : Glass / Themal Lens / Thermal Birefringence / 90 Degree Quartz Rotator / Thermal Birefringence Compensation / 90度石英施光子 / 差分法 / 90度旋光子 / 複屈折補償 / Nd:ガラス / Nd : ガラス / Nd : YAG
Research Abstract

a) An LD pumped solid state laser is expected to deliver high average laser power output with high efficiency at hight repetion rate and is a promising candidate of laser driver for an inertial fusion power plant. The key issue in the development of high power solid state laser is to reduce the thermally induced distortion of laser output. The main efforts of this study are aimed to analyze the thermal properties of LD pumped solid state laser and to develop the new techniques to compensate for the thermal effects. For these purposes, the temperature distributions in the laser system were calculated by the simulation code named STREAM,and a code to calculate the spatial distribution of thermally induced birefringence was newly developed and applied to the design of laser system.
b) We performed the high-sensitivity measurements of two-dimensional (2D) thermal birefringence distribution in a laser-diode (LD) Pumped Nd : glass (HAP4) laser lasing (at 1054nm) and under no lasing conditions … More . The thermal birefringence was reduced under the lasing condition owing to the depletion of stored energy by stimulated emission. By inserting a 90 degree quartz rotator between two identical LD pumped Nd : glass rods, almost perfect birefringence compensation was achieved. The power loss due to thermal birefringence was evaluated quantitatively using the Jones matrix method. A considerable reduction of power loss, from over 12% before compensation to less than 0.4% after compensation, was observed the output performance of this laser was in fairly good agreement with the estimation after taking into account the power loss due to thermal birefringence.
c) A novel laser architecture of laser-diode pumped eight pass 1064-nm Nd : YAG zig-zag slab laser amplifier was developed aming to achieve high energy extraction efficiency and good bcam quality. A high energy extraction efficiency of upto 73% for the laser mode volume has been achieved in this amplififier operating at an initial small signal gain of 3.36. The excellent beam quality factor M squared of 1.2 has been obtained. The compensation of thermal birefringence in this amplifer was successfully performed using a 90 degree quartz rotator. Less

Report

(4 results)
  • 1997 Annual Research Report   Final Research Report Summary
  • 1996 Annual Research Report
  • 1995 Annual Research Report
  • Research Products

    (27 results)

All Other

All Publications (27 results)

  • [Publications] 桐山 博光: "半導体レーザー励起高効率 Nd:YAGレーザー増幅器" 信学技報. LQE97-69. 13-16 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] M.Terashima: "Anamonphic Focusing Optical System for Laser-Diode-Array" Optical Review. 4・4. 502-506 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] S.Nakai: "Development of Diode-Pumped Solid-State Laser and its Application to Laser Fusion and Industry" Laser Physics. 7・6. 1-7 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] H.Kiriyama: "Thermal Birefringence Effect on the Performance of a Laser-Diode Pumped Solid-State Laser" Jpn.J.Appl.Phys.36・12A. 7197-7201 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] H.Kiriyama: "Laser Diode-Pumped Eight Pass Nd : YAG Slab Laser Amplifier" SPIE. 3264(in press). (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] H.Kiriyama: "Temperature Dependence of Emission Cross-Section of Yb : glass" Jpn.J.Appl.Phys.36-9A/B. L1165-L1167 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] H.Kiriyama, N.Srinivasan, M.Ohmi, M.Yamanaka et al.: "High-Sensitivity Two-Dimensional Observation on Thermal Birefringence Compensation in Laser-Diode Pumped Nd : Glass Laser Rods" Optical Review. Vol.3, No.1. 14-16 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] M.Terashima, K.Yamamoto, M.Yamanaka et al.: "Anamorphic Focusing Optical System for Laser-Diode-Array" Optical Revyew. Vol.4, No.4. 502-506 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] H.Kiriyama, N.Srinivasan, M.Yamanaka et al.: "Temperature Dependence of Emission Cross-Section of Yb : Glass" Jpn.J.Appl.Phys.Vol.36, No.9A/B. L1165-L1167 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] S.Nakai, Y.Izawa, M.Nakatsuka, M.Yamanaka et al.: "Development of Diode-Pumped Solid-State Laser and its Application to Laser Fusion and Industry" Laser Physics. Vol.7, No.6. 1-7 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] H.Kiriyama, T.Yoshida, N.Srinivasan, H.Matsui, M.Yamanaka et al.: "Thermal Birefringence Effect on the Performance of a Laser-Diode Pumped Solid-State Laser" Jpn.J.Appl.Phys.Vol.36, No.12A. 7197-7201 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] H.Kiriyama, K.Nishida, M.Yamanaka et al.: "Laser-Diode Pumped Eight Pass Nd : YAG Slab Laser Amplifier (Invited)" SPIE. No.3264 (in press). (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] M.Yamanaka, N.Srinivasan et al.: "All Solid-State Tunable KTP Optical Parametric Oscillator Amplifier System" J.Korean Phys.Soc.(in press). (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 桐山博光: "半導体レーザー励起高効率 Nd:YAGレーザー増幅器" 信学技報. LQE97-69. 13-16 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] M.Tarashima: "Anamonphic Focusing Optical System for Laser-Diode-Array" Optical Review. 4・4. 502-506 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] S.Nakai: "Development of Diode-Pumped Solid-State Laser and its Application to Laser Fusion and Industry" Laser Physics. 7・6. 1-7 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] H.Kiriyama: "Thermal Birefringence Effect on the Performance of a Laser-Diode Pumped Solid-State Laser" Jpn.J.Appl.Phys.36・12A. 7197-7201 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] H.Kiriyama: "Laser Diode-Pumped Eight Pass Nd : YAG Slab Laser Amplifier" SPIE. 3264(in press). (1998)

    • Related Report
      1997 Annual Research Report
  • [Publications] H.Kiriyama: "Temperature Dependence of Emission Cross-Section of Yb : glass" Jpn.J.Appl.Phys.36-9A/B. L1165-L1167 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] H.Kiriyama: "High-Sensitivity Two-Dimensional Observation of Thermal Birefringence Compensation in Laser-Diode Pumped Nd:Glass Laser Rods" Optical Review. 3,1. 14-16 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] H.Kiriyama.: "High-Sensitivity Two-Dimensional Observation of Thermal Birefringence in the Laser-Diode Pumped Solid-State Lasers" SPIE. 2873. 13-16 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 桐山博光: "LD励起固体レーザー材料における2次元熱複屈折分布測定とその補償" レーザー研究. 24,3. 343-352 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 桐山博光: "熱複屈折補償型LD励起Nd:ガラスレーザーの開発研究" 信学技報. LQE96-4. 19-23 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 桐山博光: "LD励起固体レーザーにおける熱解析と出力評価" レーザー学会研究会報告. RTM-96-27. 13-19 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 桐山博光: "LD励起Nd:ガラスレーザー発振特性への熱複屈折効果の影響" 電気学会部門誌(論文誌)C分冊. (印刷中). (1997)

    • Related Report
      1996 Annual Research Report
  • [Publications] 山中正宜(分担): "図解 光デバイス辞典" オプトロニクス社, 332 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] H.Kiriyama,N.Srinicvasan,M.Ohmi,M.Yamanaka,他4名: "High-Sensitivity Two-Dimensional Obserration of Thermal Birefringence Compensation in Laser-Diode Nd : Glass Laser Rods" Optical Review. 3. 14-16 (1996)

    • Related Report
      1995 Annual Research Report

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Published: 1995-04-01   Modified: 2016-04-21  

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