本文提出了一种基于定向耦合器型的高分子聚合物波导光开关设计,其突出特点是极低的波长相关性和耦合区几何尺寸敏感度,可采用橡胶成型工艺(Rubber Molding Process)实现高聚物波导在硅基底上的快速转印成型.利用BPM方法进行了器件的波导结构设计及性能模拟,插入损耗为0.4～0.6 dB,串扰<-32 dB,偏振相关损耗约为0.08 dB,电光系数r33＝14 pm/V时,器件的开关电压为42 V.

A design of directional coupler based polymeric electro-optical switch is presented, focusing on the reduction of both wavelength dependence and the sensitivity of optical characteristics to coupling length. A optimized configuration of the switch was found with a <0.3 dB insertion loss variation for the coupling length to change from 3800 to 4300 μm, making it feasible to form the polymer structure on silicon substrate by rubber molding process or other rapid printing techniques. The characteristics of the optical switch were analyzed by BPM simulations and an insertion loss as low as 0.4~0.6 dB was obtained, along with a crosstalk of-32 dB and a PDL of 0.08 dB. The driving voltage was found to be 42 V when r_~33 =14 pm/V.