==> [email protected] (最爱美嘉...^^) 提到: > what is 相位匹配? > 为什麽需要相位匹配? > 不满足相位匹配会如何? > 这是我的问题,希望各位同学帮我解答 > 谢谢^^ Phase matching is the k-space conservation which must be satisfied at the interface where the tranformation of two different electromagnetic waves occurs. For instance, while a light wave propagates (with a fixed k) in the forward direction of an optical fiber and meets a Bragg grating, a k-space conservation might exhibit between a forward mode (k), backward mode (-k), and the grating "K". If it happens, we say the phase matching condition is satisfied, and a corresponding light with a fixed -k will propagate in the backward direction of the optical fiber. -- ☆ [Origin:椰林风情] [From: fiber7.ee.nthu.edu.tw] [Login: **] [Post: 13]