Highly efficient and high-power composite lasers by use of room-temperature bonding

• Project/Area Number: 17K05081
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Optical engineering, Photon science
• Research Institution: Chuo University
• Principal Investigator: SHOJI Ichiro 中央大学, 理工学部, 教授 (90272385)
• Project Period (FY): 2017-04-01 – 2021-03-31
• Project Status: Completed (Fiscal Year 2020)
• Budget Amount: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000); Fiscal Year 2019: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2018: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2017: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
• Keywords: 複合構造レーザー / 常温接合 / ダイヤモンド / マイクロチップレーザー / レーザー / 複合構造

Outline of Final Research Achievements

We succeeded in developing high-performance composite lasers comprising a laser crystal and a diamond crystal which has large thermal conductivity. We realized the structure which has a anti-reflection coating layer at the bonded interface by using the room-temperature-bonding technique. Efficient removal of heat from the laser crystal to the diamond enabled 1.5 times increase of the laser output power compared with a non-composite laser crystal. Moreover, 1.3 times higher efficiency as well as 1.2 times higher output power were obtained compared with a composite laser which does not have the coating layer at the bonded interface.

Academic Significance and Societal Importance of the Research Achievements

高出力レーザーは基礎研究のみならず，産業や医療等幅広い分野でますます必要となっている．本研究で得られた成果は，小型で実用性が高いながらも大きな出力が得られるレーザーを今後実現するうえで意義が大きい．また，レーザー分野に限らず，異種材料の複合化によって新たな機能を発現する材料・デバイスの研究が精力的に行われている．本研究では，材料同士を原子レベルで接合し，かつ，光学特性を制御するためのコーティング層を挿入したデバイスが作製可能であることを初めて実証できた．

Research Products

• [Journal Article] 常温接合による複合構造レーザおよび波長変換デバイスの開発 (2020)
  • Author(s): 庄司一郎
  • Journal Title: 光アライアンス Volume: 31 Pages: 34-39
  • NAID: 40022196519
• [Journal Article] Evaluation of eight nonlinear crystals for phase-matched Terahertz second-order difference-frequency generation at room temperature (2020)
  • Author(s): Cyril Bernerd, Patricia Segonds, Jerome Debray, Jean-Francois Roux, Emilie Herault, Jean-Louis Coutaz, Ichiro Shoji, hiroaki Minamide, Hiromasa Ito, Dominique Lupinski, Kevin Zawilski, Peter Schunemann, Xinyuan Zhang, Jiyang Wang, Zhanggui Hu, and Benoit Boulanger
  • Journal Title: Optical Materials Express Volume: 10 Issue: 2 Pages: 561-576
  • DOI: 10.1364/ome.383548
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] High-power and highly efficient composite laser with an anti-reflection coated layer between a laser crystal and a diamond heat spreader fabricated by room-temperature bonding (2017)
  • Author(s): Ichikawa Hiromasa、Yamaguchi Kohki、Katsumata Tomo、Shoji Ichiro
  • Journal Title: Optics Express Volume: 25 Issue: 19 Pages: 22797-22797
  • DOI: 10.1364/oe.25.022797
  • Peer Reviewed / Open Access
• [Presentation] Fabrication of a quasi-phase-matching stack of multiple GaAs plates with lower scattering loss at the bonded interfaces by use of room-temperature bonding (2020)
  • Author(s): Rika Tanimoto, Yuki Takahashi, and Ichiro Shoj
  • Organizer: 9th EPS-QEOD Europhoton Conference
  • Int'l Joint Research
• [Presentation] 常温接合を用いた GaAs プレート多数枚積層擬似位相整合中赤外波長変換デバイスの高品質化II (2020)
  • Author(s): 高橋 勇輝、谷本 里香、庄司 一郎
  • Organizer: 第81回応用物理学会秋季学術講演会
• [Presentation] Fabrication of Quasi-phase-matching Stacked Large-aperture GaAs Plates Using the Room-temperature-bonding Technique for Mid-IR high-power Wavelength Conversion (2020)
  • Author(s): Ichiro Shoji
  • Organizer: High-brightness Sources and Light-driven Interactions Congress
  • Int'l Joint Research / Invited
• [Presentation] 定比組成LiNbO3 及びLiTaO3の屈折率温度依存性精密測定 (2020)
  • Author(s): 岩本 祐輝、加賀美 侑希、鈴木 奏哉、庄司 一郎、古川 保典
  • Organizer: レーザー学会第41回年次大会
• [Presentation] 紫外波長変換材料LaBGeO5の2次非線形光学定数精密測定 (2020)
  • Author(s): 平山 尚哉, 田中 亮一, 山野辺 真輝, 庄司 一郎
  • Organizer: レーザー学会第41回年次大会
• [Presentation] 常温接合を用いた GaAs プレート多数枚積層擬似位相整合中赤外波長変換デバイスの高品質化III (2020)
  • Author(s): 高橋 勇輝, 谷本 里香, 庄司 一郎
  • Organizer: 第68回応用物理学会春季学術講演会
• [Presentation] 紫外波長変換材料LaBGeO5の非線形光学定数精密測定 (2020)
  • Author(s): 田中 亮一, 平山 尚哉, 山野辺 真輝, 庄司 一郎
  • Organizer: 第68回応用物理学会春季学術講演会
• [Presentation] Fabrication of Quasi-phase-matching Stacked Large-aperture GaAs Plates Using the Room-temperature-bonding Technique for Mid-IR high-power Wavelength Conversion (2020)
  • Author(s): Ichiro Shoji
  • Organizer: Mid-Infrared Coherent Sources conference 2020
  • Int'l Joint Research / Invited
• [Presentation] 常温接合を用いたGaAsプレート多数枚積層擬似位相整合中赤外波長変換デバイスの高品質化 (2020)
  • Author(s): 谷本 里香，高橋 勇輝，庄司 一郎
  • Organizer: 第67回応用物理学会春季学術講演会
• [Presentation] 常温接合を用いた固体レーザおよび波長変換デバイスの開発 (2020)
  • Author(s): 庄司 一郎
  • Organizer: 日本学術振興会接合界面創成技術第191委員会第25回研究会
  • Invited
• [Presentation] Large-aperture quasi-phase-matching stacks of multiple GaAs plates fabricated with the room-temperature bonding for high-power wavelength conversion in mid-IR region (2019)
  • Author(s): Ichiro Shoji
  • Organizer: The 27th International Conference on Advanced Laser Technologies
  • Int'l Joint Research / Invited
• [Presentation] 定比組成LiNbO3 及びLiTaO3の屈折率温度依存性精密測定Ⅳ (2019)
  • Author(s): 岩本 祐輝，川島 潤也，庄司 一郎，古川 保典
  • Organizer: 第80回応用物理学会秋季学術講演会
• [Presentation] Development of Composite Lasers and Stacked Wavelength-Conversion Devices by use of the Room-Temperature-Bonding Technique (2019)
  • Author(s): Ichiro Shoji
  • Organizer: International Summit on Optics, Photonics, and Laser Technologies
  • Int'l Joint Research / Invited
• [Presentation] Quasi-phase-matched GaAs stacks for midinfrared wavelength conversion fabricated with the room-temperature bonding (2019)
  • Author(s): Ichiro Shoji
  • Organizer: The 8th Advanced Lasers and Photon Sources (ALPS 2019)
  • Int'l Joint Research / Invited
• [Presentation] Investigation of i-layer quality of diamond pin diode-type electron emitters using electroluminescence and cathodoluminescence measurements (2019)
  • Author(s): T. Honbu, T. Makino, H. Kato, M. Ogura, H. Okushi, S. Yamasaki, K. Ichikawa, T. Teraji, S. Koizumi, S. Ohmagari , D. Takeuchi, I. Shoji
  • Organizer: Hasselt Diamond Workshop 2019
  • Int'l Joint Research
• [Presentation] Fabrication of a quasi-phasematching stack of 53 GaAs plates for high-power mid-infrared wavelength conversion by use of room-temperature bonding (2019)
  • Author(s): Hiroki Takase, Hiroki Atarashi, Tsubasa Kaga, Ichiro Shoji
  • Organizer: Photonics West 2019
  • Int'l Joint Research
• [Presentation] Direct Measurements of Temperature-Dependent Refractive Indices of Stoichiometric LiNbO3 and LiTaO3 (2018)
  • Author(s): Junya Kawashima, Ryutaro Ohno, Ichiro Shoji, and Yasunori Furukawa
  • Organizer: Advanced Photonics 2018
  • Int'l Joint Research
• [Presentation] Accurate measurements of second-order nonlinear-optical coefficients of a UV-generating wavelength-conversion material: LaBGeO5 (2018)
  • Author(s): Ichiro Shoji, Shinta Kawasaki, and Yusuke Honda
  • Organizer: Advanced Photonics 2018
  • Int'l Joint Research
• [Presentation] ホウ素濃度の異なるp型基板上に作製したダイヤモンドp-i-nダイオードからの電子放出の比較 (2018)
  • Author(s): 本部達也，牧野俊晴，加藤宙光，小倉政彦，大串秀世，山崎 聡，竹内大輔，庄司一郎
  • Organizer: 第32回ダイヤモンドシンポジウム
• [Presentation] ホウ素濃度の異なるp型基板上に作製したダイヤモンドp-i-nダイオードからの電子放出の比較 (2018)
  • Author(s): 本部 達也、牧野 俊晴、加藤 宙光、小倉 政彦、大串 秀世、山崎 聡、竹内 大輔、庄司 一郎
  • Organizer: 第79回応用物理学会秋季学術講演会
• [Presentation] デュアルコム分光による位相屈折率の精密測定法の開発 (2018)
  • Author(s): 王 月、浅原 彰文、庄司 一郎、野竹 孝志、南出 泰亜、美濃島 薫
  • Organizer: 第79回応用物理学会秋季学術講演会
• [Presentation] 定比組成LiNbO3 及びLiTaO3の屈折率温度依存性精密測定3 (2018)
  • Author(s): 川島 潤也、大野 竜太郎、岩本 祐輝、庄司 一郎、古川 保典
  • Organizer: 第79回応用物理学会秋季学術講演会
• [Presentation] 常温接合を用いたGaAsプレート多数枚積層擬似位相整合中赤外波長変換デバイスの開発3 (2018)
  • Author(s): 高瀬 大幹、加賀 翼、新 裕貴、庄司 一郎
  • Organizer: 第79回応用物理学会秋季学術講演会
• [Presentation] Room-temperature-bonded Nd:YAG/diamond Composite Laser with an Anti-reflection Coating Layer at the Bonded Interface for High-power and Highly Efficient Oscillation (2017)
  • Author(s): Tomo Katsumata, Hiromasa Ichikawa and Ichiro Shoji
  • Organizer: Conference on Lasers and Electro-Optics Europe (CLEO/Europe) 2017
  • Int'l Joint Research
• [Presentation] Development of Multiple GaAs Plate-stacked Quasi-phase-matching Mid-infrared Wavelength-conversion Devices by Use of Room-temperature Bonding (2017)
  • Author(s): Hiroki Atarashi, Terumitsu Kubota, and Ichiro Shoji
  • Organizer: Conference on Lasers and Electro-Optics Europe (CLEO/Europe) 2017
  • Int'l Joint Research
• [Presentation] Rapid Evaluation Method of Anisotropy by Dual Comb Spectroscopy (2017)
  • Author(s): Ken-ichi Kondo, Akifumi Asahara, Yue Wang, Ichiro Shoji, and Kaoru Minoshima
  • Organizer: 24th Congress of the International Commission for Optics
  • Int'l Joint Research
• [Presentation] Precise Birefringence Measurement Of Anisotropic Materials By Dual-Comb Spectroscopy (2017)
  • Author(s): Ken-ichi Kondo, Akifumi Asahara, Yue Wang, Ichiro Shoji, Kaoru Minoshima
  • Organizer: Conference on Lasers and Electro-Optics Pacific Rim 2017
  • Int'l Joint Research
• [Presentation] Direct Bonding Of A Laser Crystal And Copper By Use Of The Room-temperature Bonding (2017)
  • Author(s): Tomoki Matsui, Shin Katsumata, and Ichiro Shoji
  • Organizer: Conference on Lasers and Electro-Optics Pacific Rim 2017
  • Int'l Joint Research
• [Presentation] Accurate Measurements Of Electro-optic Coefficients Of MgO-doped And Undoped Congruent And Stoichiometric LiNbO3 (2017)
  • Author(s): Kazuki Akiyama, Syota Nakano, and Ichiro Shoji
  • Organizer: Conference on Lasers and Electro-Optics Pacific Rim 2017
  • Int'l Joint Research
• [Presentation] Accurate measurements of second-order nonlinear-optical coefficients of LaBGeO5 (2017)
  • Author(s): Shinta Kawasaki, Yusuke Honda, Ichiro Shoji
  • Organizer: 24th Congress of the International Commission for Optics
  • Int'l Joint Research
• [Presentation] Room-Temperature-Bonding Technique for Developing New Laser and Wavelength-Conversion Devices (2017)
  • Author(s): Ichiro Shoji
  • Organizer: The 25th International Conference on Advanced Laser Technologies
  • Int'l Joint Research / Invited
• [Presentation] Wavelength-conversion Characteristics of Quasi-phase-matching Stack of GaAs Plates Fabricated with the Room-temperature-bonding Technique (2017)
  • Author(s): Hiroki Atarashi, Hiroki Takase, Ichiro Shoji
  • Organizer: Advanced Solid-State Lasers 2017
  • Int'l Joint Research
• [Presentation] Fabrication of Walk-off Compensating BBO Devices with Multiple Thin Plates Using Room-Temperature Bonding (2017)
  • Author(s): Takatomo Shimada, Kazuaki Nagashima, Shuhei Koyama, Ichiro Shoji
  • Organizer: Advanced Solid-State Lasers 2017
  • Int'l Joint Research
• [Presentation] Room-Temperature Bonding of Laser and Nonlinear-Optical Crystals for High-Performance Lasers and Wavelength-Conversion Devices (2017)
  • Author(s): Ichiro Shoji
  • Organizer: The 7th Asian Conference on Crystal Growth and Crystal Technology
  • Int'l Joint Research / Invited
• [Presentation] 波長変換材料LaBGeO5の2次非線形光学定数精密測定II (2017)
  • Author(s): 河崎進太，本多勇介，庄司一郎
  • Organizer: 第78回応用物理学会秋季学術講演会
• [Presentation] 常温接合を用いたレーザー結晶と金属ホルダとの原子レベル接合 (2017)
  • Author(s): 松井鵬樹，若松将吾，庄司一郎
  • Organizer: 第78回応用物理学会秋季学術講演会
• [Presentation] 常温接合を用いたウォークオフ補償構造BBO波長変換デバイスの作製 (2017)
  • Author(s): 永嶋一瑛, 島田学朋, 小山修平, 庄司一郎
  • Organizer: 第78回応用物理学会秋季学術講演会
• [Presentation] 常温接合を用いたGaAsプレート多数枚積層擬似位相整合中赤外波長変換デバイスの開発II (2017)
  • Author(s): 髙瀬大幹，新裕貴，窪田輝充，庄司一郎
  • Organizer: 第78回応用物理学会秋季学術講演会
• [Presentation] 定比組成LiNbO3 及びLiTaO3の屈折率温度依存性精密測定 (2017)
  • Author(s): 川島潤也，加藤大樹，庄司一郎，古川保典
  • Organizer: 第78回応用物理学会秋季学術講演会
• [Presentation] デュアルコム分光による光学材料の群屈折率および分散特性の精密計測 (2017)
  • Author(s): 近藤健一, 浅原彰文, 王月, 庄司一郎, 美濃島薫
  • Organizer: 第78回応用物理学会秋季学術講演会
• [Presentation] 光学材料の群屈折率および分散高速測定のためのデュアルコム分光法の開発 (2017)
  • Author(s): 近藤健一、浅原彰文、王月、庄司一郎、美濃島薫
  • Organizer: Optics & Photonics Japan (OPJ) 2017
• [Presentation] 定比組成LiNbO3 及びLiTaO3の屈折率温度依存性精密測定II (2017)
  • Author(s): 川島潤也，大野竜太郎，庄司一郎，古川保典
  • Organizer: 第65回応用物理学会春季学術講演会