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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Optical decay ： ウィキペディア英語版 Optical decay Optical decay is process of relaxation of excitation of an excited quantum system, usually due to the spontaneous emission of a photon or a phonon. Optical decay is dominant mechanism of quenching of excitation of active optical media. In solid-state lasers the optical decay limits the storage of energy in active medium. Also, the term optical decay is used to the effect of quick reduction of luminosity of astrophysical objects 〔 http://edoc.mpg.de/199219 〕 ==Phenomenology of optical decay== In the first approximation, the optical decay can be treated as just spontaneous emission, and its rate is determined with the Einstein Coefficients. For the most of laser systems, the effects of decoherence determine the spectral width of the emitted photons, and there is no reason to consider in detail the evolution of isolated quantum-mechanical systems which show the optical decay. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Optical decay」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.