翻訳と辞書 Words near each other ・ Round-robin scheduling ・ Round-robin story ・ Round-robin tournament ・ Round-tailed ground squirrel ・ Round-tailed manakin ・ Round-tailed muskrat ・ Round-tailed paradise fish ・ Round-the-pole flying ・ Round-the-world ticket ・ Round-tongued floating frog ・ Round-topped boiler ・ Round-tower church ・ Round-trip delay time ・ Round-trip engineering ・ Round-trip format conversion ・ Round-trip gain ・ Round-trip translation ・ Round-tripping (finance) ・ Round-Up (video game) ・ Round-Up Time in Texas ・ Round1 Japan Cup ・ Roundabout ・ Roundabout (1957 film) ・ Roundabout (1967 TV series) ・ Roundabout (album) ・ Roundabout (disambiguation) ・ Roundabout (gene family) ・ Roundabout (play) ・ Roundabout (song) ・ Roundabout (video game) 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 Round-trip gain ： ウィキペディア英語版 Round-trip gain Round-trip gain refers to the laser physics, and laser cavities (or laser resonators). It is gain, integrated along a ray, which makes a round-trip in the cavity. At the continuous-wave operation, the round-trip gain exactly compensates both the output coupling of the cavity and its background loss. ==Round-trip gain in geometric optics== Generally, the Round-trip gain may depend on the frequency, on the position and tilt of the ray, and even on the polarization of light. Usually, we may assume that at some moment of time, at reasonable frequency of operation, the gain $~G(x,y,z)~$ is function of the Cartesian coordinates $~x~$, $~y~$, and $~z~$. Then, assuming that the geometrical optics is applicable the round-trip gain $~g~$ can be expressed as follows: :$~g=\backslash int\; G(x(a),y(a),z(a))~a~$, where $~a~$ is path along the ray, parametrized with functions $~x(a)~$, $~y(a)~$, $~z(a)~$; the integration is performed along the whole ray, which is supposed to form the closed loop. In simple models, the flat-top distribution of pump and gain $~G~$ is assumed to be constant. In the case of simplest cavity, the round-trip gain $~g=2Gh~$, where $~h~$ is length of the cavity; the laser light is supposed to go forward and back, this leads to the coefficient 2 in the estimate. In the steady-state continuous wave operation of a laser, the round-trip gain is determined by the reflectivity of the mirrors (in the case of stable cavity) and the magnification coefficient in the case of unstable resonator (unstable cavity). 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「Round-trip gain」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.