量研学術機関リポジトリ「QST-Repository」は、国立研究開発法人 量子科学技術研究開発機構に所属する職員等が生み出した学術成果（学会誌発表論文、学会発表、研究開発報告書、特許等）を集積しインターネット上で広く公開するサービスです。 Welcome to QST-Repository where we accumulates and discloses the academic research results(Journal Publications, Conference presentation, Research and Development Report, Patent, etc.) of the members of National Institutes for Quantum Science and Technology.
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The radiation resistance of Nd-doped laser crystals was measured using a proton beam in order to construct spaceborne laser systems. After irradiation of 30 krad, we measured the variation of transmittance for crystals. The variation for all crystals was less than 1%. Since 30 krad is the irradiation value received over 30 years in the International Space Station with a 1-mm-thick Al cover, we conclude that all of the laser crystals have sufficient resistance for a 3-year spaceborne lidar mission at the International Space Station.
Radiation resistance of Nd-doped laser crystals for space application
