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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 Power-law index profile ： ウィキペディア英語版 Power-law index profile For optical fibers, a power-law index profile is an index of refraction profile characterized by :$n(r)\; =$ \begin n_1 \sqrt & r \le \alpha\\ n_1 \sqrt & r \ge \alpha \end where $\backslash Delta\; =\; ,$ and $n(r)$ is the nominal refractive index as a function of distance from the fiber axis, $n\_1$ is the nominal refractive index on axis, $n\_2$ is the refractive index of the cladding, which is taken to be homogeneous ($n(r)=n\_2\; \backslash mathrm\; r\; \backslash ge\; \backslash alpha$), $\backslash alpha$ is the core radius, and $g$ is a parameter that defines the shape of the profile. $\backslash alpha$ is often used in place of $g$. Hence, this is sometimes called an alpha profile. For this class of profiles, multimode distortion is smallest when $g$ takes a particular value depending on the material used. For most materials, this optimum value is approximately 2. In the limit of infinite $g$, the profile becomes a step-index profile. ==See also== *Graded-index fiber 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「Power-law index profile」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.