翻訳と辞書 Words near each other ・ Extinction (film) ・ Extinction (Forgotten Realms novel) ・ Extinction (neurology) ・ Extinction (optical mineralogy) ・ Extinction (psychology) ・ Extinction chess ・ Extinction coefficient ・ Extinction cross ・ Extinction debt ・ Extinction event ・ Extinction in Stereo ・ Extinction Level Event ・ Extinction of Mankind ・ Extinction paradox ・ Extinction probability ・ Extinction ratio ・ Extinction risk from global warming ・ Extinction threshold ・ Extinction vortex ・ Extinctioners ・ Extinctionism ・ Extinguishment ・ Extirpation ・ Extize ・ EXTL1 ・ EXTL2 ・ EXTL3 ・ Exto Partners ・ Extol ・ Extol (album) Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Extinction ratio ： ウィキペディア英語版 Extinction ratio In telecommunications, extinction ratio (''r''e) is the ratio of two optical power levels of a digital signal generated by an optical source, ''e.g.,'' a laser diode. The extinction ratio may be expressed as a fraction, in dB, or as a percentage.〔(【引用サイトリンク】title=Extinction Ratio )〕 It may be given by :$r\_e\; =\; \backslash frac$, where ''P''1 is the optical power level generated when the light source is on, and ''P''0 is the power level generated when the light source is off. The polarization extinction ratio (PER) is the ratio of optical powers of perpendicular polarizations, usually called TE (transverse electrical) and TM (transverse magnetic). In telecommunications, the PER is used to characterize the degree of polarization in a polarization maintaining device or fiber. For coherent transmitter and receiver, the PER is a key parameter since X-polarization and Y-polarization are coded with different signals. ==References== 〔 * *Material also incorporated from MIL-STD-2196. 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「Extinction ratio」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.