法拉第(Michael Faraday, 1791-1867),伟大的英国物理学 家和化学家他创造性地提出场的 思想,磁场这一名称是法拉第最 早引入的他是电磁理论的创始人 之一,于1831年发现电磁感应现 象,后又相继发现电解定律,物 质的抗磁性和顺磁性,以及光的 偏振面在磁场中的旋转

一、掌握并能熟练应用法拉第电磁感应定律和楞次定律来计算感应电动势,并判明其方向. 二、理解动生电动势和感生电动势的本质.了解有旋电场的概念。 三、了解自感和互感的现象,会计算几何形状简单的导体的自感和互感。 四、了解磁场具有能量和磁能密度的概念,会计算均匀磁场和对称磁场的能量。 五、了解位移电流和麦克斯韦电场的基本概念以及麦克斯韦方程组(积分形式)的物理意义

光线轨迹:限制在子午平面内传播的周期曲线。轨迹曲线在 光纤端面投影线仍是过园心的直线,但一般不与纤壁相交。 广义折射定律:m(r)cos0(r)=K常数) 局部数值孔径:定义局部数值孔径NA(r)为入射点媒质折射率 与该点最大入射角的正弦值之积,即

一、导波光:受到约束的光波 二、光波导:约束光波传输的媒介 三、介质光波导三要素:

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

What is GRIN lenses GRIN lenses are short cylindrical lengths of glass with a graded refractive index: the index decreases with the square of the distance from the axis of the lens. GRIN lenses are very similar to graded index fibre and are sometimes called SELFOC lenses

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

What needed? to combine signals and/or to split them multiple ways up to 1000X1000 for WDM LANS three important characteristics Return Loss the amount of power that is reflected and thus lost Insertion LoSs the amount of signal lost in the total transit through the device Excess Loss additional loss of a device

一、光器件:光通信网络的基础 关键技术:SDH

一、结构:yz方向无限延伸 ⅹ方向尺寸d接近于传输光波长量级 损耗ldB/cm左右 折射率:覆盖层、芯区、衬底分别为: