一种低驱动电压的电光开关设计

介绍了一种基于法布里-珀罗标准具的电光开关，对开关的工作原理进行了分析，并对开关的结构进行了设计。以铌酸锂晶体为例，计算了开关透过特性随驱动电压、激光波长的变化规律。结果表明，在晶体参数相同的情况下，这种法布里-珀罗标准具开关与采用正交偏振片的电光开关相比，可以大幅降低电光晶体的驱动电压，同时还具有较好的选模能力。

Design of a low voltage driving electro-optical switch

An electro-optical switch based on Fabry-Perot(F-P) etalon is proposed. The working principle of the F-P switch is introduced, and the structure of the F-P switch is designed. As an example, the dependences of transmittance of the F-P switch on driving voltage and wavelength are analyzed with lithium niobate crystal as the intracavity medium. The results indicate that, with the same crystal parameters, the driving voltage can be dramatically reduced for the F-P switch compared with those switches using orthogonal polarizers, and mode selection can also be achieved in this F-P switch.