翻訳と辞書 Words near each other ・ Gaiman Award ・ Gaiman Department ・ Gaiman, Chubut ・ Gaimar ・ Gaimardia ・ Gaimardia setacea ・ Gaimberg ・ Gaimdibhla ・ Gaimersheim ・ Gain ・ Gain (accounting) ・ Gain (detergent) ・ Gain (electronics) ・ Gain (EP) ・ Gain (information retrieval) ・ Gain (laser) ・ Gain (novel) ・ Gain (projection screens) ・ Gain (singer) ・ Gain before feedback ・ Gain Capital ・ Gain compression ・ GAIN domain ・ Gain Glacier ・ Gain graph ・ Gain Ground ・ Gain line ・ Gain scheduling ・ Gain stage ・ Gain-field encoding 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 Gain (laser) ： ウィキペディア英語版 Gain (laser) In laser physics, gain or amplification is a process where the medium transfers part of its energy to the emitted electromagnetic radiation, resulting in an increase in optical power. This is the basic principle of all lasers. Quantitatively, ''gain'' is a measure of the ability of a laser medium to increase optical power. ==Definition== The gain can be defined as the derivative of logarithm of power $~P~$ as it passes through the medium: :$G\; =\; \backslash fracz\}\backslash ln(P)=\backslash frac\; z\}$ where $~z~$ is the coordinate in the direction of propagation. This equation neglects the effects of the transversal profile of beam. In the quasi-monochromatic paraxial approximation, the gain can be taken into account with the following equation :$$ 2ik\frac= \Delta_E + 2 \nu E + i G E, where $~\backslash nu~$ is variation of index of refraction (Which is supposed to be small), $~E~$ is complex field, related to the physical electric field $~E\_~$ with relation $~E\_=\backslash left(\; \backslash vec\; e\; E\; \backslash exp(ikz-i\backslash omega\; t)\backslash right)~$, where $~\backslash vec\; e~$ is vector of polarization, $~k~$ is wavenumber, $~\backslash omega~$ is frequency, $~\backslash Delta\_=\backslash left($ \frac+ \frac \right) ~ is transversal Laplacian; $~\; \backslash rm\; Re\; ~$ means real part. 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「Gain (laser)」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.