In this thesis, at first we will introduce the electromagnetic theory of optical planar waveguide, analyze the transmission characteristic of different modes and the connection loss of fiber.
在本文中，首先从电磁理论出发，利用波动光学理论分析平板波导的特性，对多模光纤连接损耗进行了理论分析。
The characteristic curves of the waveguide loss versus the number of transpositions and crossing angle are drawn out, which conform to the expcted loss characteristics of crossed optical waveguide.
本文利用最佳端焦耦合法对交叉光波导的损耗特性进行了测量和研究，绘制了波导损耗随交叉次数和交叉角的变化曲线。
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