Study on optical short-pulse generation from intensely excited gain-switched semiconductor lasers
Project/Area Number |
26390075
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Research Category |
Grant-in-Aid for Scientific Research (C)
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Allocation Type | Multi-year Fund |
Section | 一般 |
Research Field |
Optical engineering, Photon science
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Research Institution | National Institute of Advanced Industrial Science and Technology (2016) The University of Tokyo (2014-2015) |
Principal Investigator |
YOSHITA MASAHIRO 国立研究開発法人産業技術総合研究所, 太陽光発電研究センター, 主任研究員 (30292759)
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Co-Investigator(Renkei-kenkyūsha) |
AKIYAMA Hidefumi 東京大学, 物性研究所, 教授 (40251491)
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Research Collaborator |
CHEN Shaoqiang 華東師範大学, 教授
ITOH Takashi 東京大学, 物性研究所, 博士研究員
NAKAMURA Takahiro 東京大学, 物性研究所, 学生
NAKAMAE Hidekazu 東京大学, 物性研究所, 学生
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Project Period (FY) |
2014-04-01 – 2017-03-31
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Project Status |
Completed (Fiscal Year 2016)
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Budget Amount *help |
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2016: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2015: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2014: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
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Keywords | 半導体レーザー / 利得スイッチング動作 / 超短パルス / 光エレクトロニクス / 光学非線形効果 / 光源技術 / 長短パルス / 半導体レーザ / 超短光パルス |
Outline of Final Research Achievements |
Lasing performance of gain-switched semiconductor lasers under intense excitation was systematically studied. At low photo-excitation, optical pulses were generated in accordance with a conventional rate-equation analysis in a gain-switched GaAs bulk laser. However, as the photo-excitation intensity increased, the pulse width of the generated optical pulses became shorter and simultaneously spectrally broadened toward shorter-wavelength region, which was not explained by the conventional rate-equation analysis. It was also confirmed that the pulse width at the shorter-wavelength region of the optical pulses was shorter than 1 ps. The generation mechanisms of the observed unique optical pulses under intense excitation were discussed with a phenomenological carrier-dynamics model taking into account transient energy distributions and intra-band relaxations of the photo-excited carriers in the active gain region.
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Report
(4 results)
Research Products
(29 results)
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[Journal Article] Transient gain analysis of gain-switched semiconductor lasers during pulse lasing2015
Author(s)
Shao-Qian Chen, Takashi Ito, Akifumi Asahara, Hidekazu Nakamae, Takahiro Nakamura, Masahiro Yoshita, Changsu Kim, Baoping Zhang, Hiroyuki Yokoyama, Tohru Suemoto, and Hidefumi Akiyama
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Journal Title
Applied Optics
Volume: 54
Issue: 35
Pages: 10438-10442
DOI
Related Report
Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
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[Presentation] Accuracy Evaluations for Standardization of Multi-Junction Solar-Cell Characterizations via Absolute Electroluminescence2016
Author(s)
Masahiro Yoshita, Lin Zhu, Changsu Kim, Hidehiro Kubota, Tetsuya Nakamura, Mitsuru Imaizumi, Yoshihiko Kanemitsu, and Hidefumi Akiyama
Organizer
The 43rd IEEE Photovoltaic Specialists Conference (PVSC-43)
Place of Presentation
the Oregon Convention Center, Portland, Oregon, USA
Year and Date
2016-06-05
Related Report
Int'l Joint Research
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[Presentation] Current leakage and fill factor in multi-junction solar cells linked via absolute electroluminescence characterization2016
Author(s)
Lin Zhu, Masahiro Yoshita, Tetsuya Nakamura, Toshimitsu Mochizuki, Changsu Kim, Mitsuru Imaizumi, Yoshihiko Kanemitsu, Hidefumi Akiyama
Organizer
The 43rd IEEE Photovoltaic Specialists Conference (PVSC-43)
Place of Presentation
the Oregon Convention Center, Portland, Oregon, USA
Year and Date
2016-06-05
Related Report
Int'l Joint Research
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[Presentation] Calibration standards and measurement accuracy of absolute electroluminescence and internal properties in multi-junction and arrayed solar cells2016
Author(s)
Masahiro Yoshita, Lin Zhu, Changsu Kim, Toshimitsu Mochizuki, Tetsuya Nakamura, Mitsuru Imaizumi, Shaoqiang Chen, Hidehiro Kubota, Yoshihiko Kanemitsu, and Hidefumi Akiyama
Organizer
SPIE Photonics West 2016
Place of Presentation
The Moscone Center, San Francisco, CA, USA
Year and Date
2016-02-13
Related Report
Int'l Joint Research
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[Presentation] Absolute Electroluminescence Imaging of Multi-Junction Solar Cells and Calibration Standards2015
Author(s)
Masahiro Yoshita, Lin Zhu, Changsu Kim, Hidefumi Akiyama, Shaoqiang Chen, Toshimitsu Mochizuki, Hidehiro Kubota, Tetsuya Nakamura, Mitsuru Imaizumi, Yoshihiko Kanemitsu
Organizer
The 42nd IEEE Photovoltaic Specialists Conference (PVSC-42)
Place of Presentation
the Hyatt Regency New Orleans, New Orleans, LA, USA
Year and Date
2015-06-14
Related Report
Int'l Joint Research
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[Presentation] リッジ型導波路ダブルコア半導体レーザー2014
Author(s)
中村考宏, 望月敏光, 金昌秀, 陳少強, 吉田正裕, 秋山英文
Organizer
日本物理学会2014年秋季大会
Place of Presentation
中部大学 春日井キャンパス(愛知県、春日井市)
Year and Date
2014-09-07 – 2014-09-10
Related Report