JAXA Repository / AIREX 未来へ続く、宙(そら)への英知

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Other TitleConversion from solar light to coherent light for energy transfer at long distance in space
Author(jpn)佐伯 拓; 本越 伸二; 今崎 一夫; 藤岡 加奈; 中塚 正大; 新野 正之; 森 雅裕
Author(eng)Saiki, Taku; Motokoshi, Shinji; Imasaki, Kazuo; Fujioka, Kana; Nakatsuka, Masahiro; Niino, Masayuki; Mori, Masahiro
Author Affiliation(jpn)レーザー技術総合研究所; レーザー技術総合研究所; レーザー技術総合研究所; 大阪大学レーザーエネルギー学研究センター; レーザー技術総合研究所; 宇宙航空研究開発機構 総合技術研究本部; 宇宙航空研究開発機構 総合技術研究本部
Author Affiliation(eng)Institute for Laser Technology; Institute for Laser Technology; Institute for Laser Technology; Institute of Laser Engineering, Osaka University; Institute for Laser Technology; Japan Aerospace Exploration Agency (JAXA) Institute of Space Technology and Aeronautics (ISTA); Japan Aerospace Exploration Agency (JAXA) Institute of Space Technology and Aeronautics (ISTA)
Issue Date2008-05
PublisherInstitute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA/ISAS)
Publication title第27回宇宙エネルギーシンポジウム 平成19年度
The Twenty-seventh Space Energy Symposium
Start page88
End page92
Publication date2008-05
AbstractSpace solar power station needs an energetic and efficient laser as the energy transfer device from a broadband solar light to a coherent laser light. The concept of active-mirror amplifier with transparent Nd/Cr:YAG (Yttrium Aluminum Garnet) ceramics is proposed under consideration how to convert a wide spectrum of sun light to a monochromatic laser light. New ceramic material pumped by an arc-metal-halide lamp has been implemented experimentally as a fundamental prototype for the space solar power station. CW (Continuous Wave) laser light generated in a LD (Laser Dye)-pumped 1,064-nm Nd:YAG rod laser oscillator was amplified so that a spatial mode of laser output has been improved to Gaussian mode. The saturated amplification of output laser power was observed at around 40 W/sq cm in output power density when the diameter of input laser profile was 18 mm. The maximum output laser power obtained was up to 180 W (about 60 W/sq cm) with keeping spatial beam quality when Nd:YAG ceramics doped Cr ions density of 3 percent was used.
Keywordslaser power beaming; solar power satellite; active mirror amplifier; coherent light; laser beam; solar radiation; laser output; continuous wave laser; solar-pumped laser; レーザーパワービーミング; 太陽発電衛星; アクティブミラー増幅器; コヒーレント光; レーザービーム; 太陽放射; レーザー出力; CWレーザー; 太陽光励起レーザー
Document TypeConference Paper
JAXA Categoryシンポジウム・研究会

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