The effective index refractive of every mode is 2.0044, 1.7098, measured by prism coupler method.
利用棱镜耦合法测得了该薄膜中每条模所对应的有效折射率为2.0044和1.7098。
For different values of the effective refractive index, the air-guided modes can exist in different forms in part of PBGs.
依据有效折射率的不同，部分带隙中的空气-导模将以不同的形式存在。
Four effective methods on measuring refractive index of wave guide film are given. All of the methods are studied, especially, an experiment is done by the prism coupling method.
本文讨论了四种测量波导薄膜的有效方法，对各种测量方法作了分析研究，并着重对棱镜耦合法进行了实验研究。
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