棱镜-漏波导耦合器的理论分析

根据多光束干涉原理,理论上分析了棱镜-漏波导耦合器,且与棱镜-波导耦合器作了比较,给出正确使用这两种耦合器的判据.分析结果表明,在强耦合条件下,棱镜-漏波导耦合器可用于薄膜参数测量和光波导输入-输出耦合;对于弱耦合,本文的结果与Tien和Ulrich的理论一致.

Theoretical analysis of the prism-leaky waveguide coupler

According to the multi-beam interference principle, the prism-leaky waveguide coupler was analysed theoretically, and compared with the prism-waveguide coupler. Oriterions for properly using those two kinds of couplers were also given. Analysis results show that the prism-leaky waveguide coupler can be used for measuring parameters of the thin films and input-output coupling of the optical waveguide as operated substantially under strong coupling conditions. For weak coupling, our results agreed with Tien and Ulrich's theoretical analyses.