一、光器件:光通信网络的基础 关键技术:SDH

solator: Definition An isolator is a device that allows light to pass along a fibre in one direction but not in the opposite direction

河北师范大学重点建设课程 矢量场论复习

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一、法线分量的边值关系 二、切向分量的边值关系 三、其它边值关系

(1)真空或介质中电磁波传播可视为无能量损耗,电磁波无衰减; (2)电磁波遇到导体,导体内自由电子在电场的作用下运动,形成电流,电流产生焦耳热,使电磁波的能量不断损耗,因此在导体内部电磁波是一种衰减波; (3)在导体中,交变电磁场与自由电子运动相互作用,使导体中电磁波传播不同于真空或介质中电磁波的传播形式

一、电磁场波动方程 1.自由空间电磁场的 2.真空中的波动方程

一、基本原理(两个公理) 1相对性原理

What is FBG? An in-fibre Bragg grating is constructed by varying the refractive index of the core lengthwise along the fibre. Light of the specified wavelength traveling along the fibre is reflected from the grating back in the direction from which it came. Wavelengths which are not selected are passed through with little or no attenuation

第十三章电磁感应电磁场 一、自感电动势自感 穿过闭合电流回路的磁通量