laser power beaming, solar power satellite, active mirror amplifier, coherent light, laser beam, solar radiation, laser output, continuous wave laser, solar-pumped laser
その他のタイトル（英）
Conversion from solar light to coherent light for energy transfer at long distance in space
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)
出版者
宇宙航空研究開発機構宇宙科学研究本部
出版者（英）
Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA/ISAS)
雑誌名
第27回宇宙エネルギーシンポジウム 平成19年度
雑誌名(英)
The Twenty-seventh Space Energy Symposium
ページ
88 - 92
発行年
2008-05
抄録（英）
Space 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.
宇宙での長距離伝送を目的とした太陽光のコヒーレント光変換
