Here a 1×5 microfluidic optical switch using double drives is proposed. It has a simple structure and ignorable polarization dependent loss. First, the switch with the straight waveguide structure is discussed. Then, various optimization schemes are used, where the oblique waveguide structure and the method of constant refractive index ratio of interface significantly reduce the insertion loss. The final optimization results show that the 1×5 optical switch has smaller insertion loss and crosstalk than general optical switches. For 1550 nm wavelength, the insertion losses of five exit ports are 0.27 dB ∼ 0.47 dB, and the crosstalks are −24.8 dB ∼ −66.5 dB. For 1310 nm wavelength, the insertion losses are 0.13 dB ∼ 0.23 dB, and the crosstalks are −25.6 dB ∼ −70.8 dB. Our work can promote the application of microfluidics in the optical communication and provide a reference for finding waveguide optical switches with low insertion loss.

这里提出了一种使用双驱动的 1×5 微流体光开关。它具有简单的结构和可忽略的偏振相关损耗。首先，讨论具有直波导结构的开关。然后，采用各种优化方案，其中斜波导结构和界面折射率恒定的方法显着降低了插入损耗。最终优化结果表明，1×5光开关比一般光开关具有更小的插入损耗和串扰。对于1550nm波长，5个出射口的插入损耗为0.27dB～0.47dB，串扰为-24.8dB～-66.5dB。对于 1310 nm 波长，插入损耗为 0.13 dB ∼ 0.23 dB，串扰为 -25.6 dB ∼ -70.8 dB。