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

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Other Title1.2 km laser power transmission using diode laser
Author(jpn)武田 和也; 河島 信樹
Author(eng)Takeda, Kazuya; Kawashima, Nobuki
Author Affiliation(jpn)近畿大学; 近畿大学 理工学部
Author Affiliation(eng)Kinki University; Kinki University School of Science and Engineering
Issue Date2004-06
PublisherInstitute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA/ISAS)
Publication title第23回宇宙エネルギーシンポジウム 平成15年度
The 23rd ISAS Space Energy Symposium March 9, 2004
Start page143
End page147
Publication date2004-06
AbstractAn experiment of 1.2 km laser energy transmission was tested to verify the technology to be applicable to the lunar exploration mission to confirm the presence of ice in the lunar polar mission. Used is a fiber-coupled type diode laser, lambda 803.1 nm, 60 W output, the core size 400 micrometers and NA is 0.22 (nominal) cooled by a Peltier cooling unit. To focus the laser beam to less than 1 m diameter, 25 cm diameter parabolic mirror is used with a focal length of 60 cm. The optical axis is controllable with an accuracy of 0.83 micro-rad. On the laser light receiving side, 116 pieces of single junction GaAs solar cells are mounted on a 70 cm diameter panel (conversion efficiency: about 20 percent). The 1.2 km test was done at nearby Makino Park Golf Course after the sunset. The rover was set on a grass ground. The coarse tracking of the laser beam is done manually using an IR viewer and CRT image of the beam path transmitted through the wireless LAN system. And the test was performed successfully. A similar experiment was intended at Lanai Island in Hawaii towards Japan-US collaboration. Unfortunately, the weather was not favorable and the same experiment could not be performed, however, a very impressive IR image of a long distance propagation of the laser beam was taken from the laser transmission side.
Keywordssemiconductor laser; laser power beaming; lunar exploration; lunar surface; optical fiber; laser beam; lunar probe; rover model; 半導体レーザー; レーザー送電; 月探査; 月表面; 光ファイバ; レーザービーム; 月探査機; ローバーモデル
Document TypeConference Paper
JAXA Categoryシンポジウム・研究会

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