Zohrabi Mo, Yang Lim Wei, Bright Victor M, Gopinath Juliet T
Opt Express. 2020 Mar 2;28(5):5991-6001. doi: 10.1364/OE.381565.
An optical switch based on an electrowetting prism coupled to a multimode fiber has demonstrated a large extinction ratio with speeds up to 300 Hz. Electrowetting prisms provide a transmissive, low power, and compact alternative to conventional free-space optical switches, with no moving parts. The electrowetting prism performs beam steering of ±3 with an extinction ratio of 47 dB between the ON and OFF states and has been experimentally demonstrated at scanning frequencies of 100-300 Hz. The optical design is modeled in Zemax to account for secondary rays created at each surface interface (without scattering). Simulations predict 50 dB of extinction, in good agreement with experiment.
一种基于与多模光纤耦合的电润湿棱镜的光开关，已展现出高达300 Hz的速度和较大的消光比。电润湿棱镜提供了一种透射式、低功耗且紧凑的传统自由空间光开关替代方案，且无活动部件。该电润湿棱镜可实现±3的光束转向，开态和关态之间的消光比为47 dB，并且已在100 - 300 Hz的扫描频率下得到实验验证。光学设计在Zemax中建模，以考虑在每个表面界面产生的二次光线（无散射）。模拟预测消光为50 dB，与实验结果吻合良好。
