为了降低电光开关的驱动电压，采用将铌酸锂晶体置于法布里-珀罗腔内的方法进行了实验研究，得到了电光开关透过特性随驱动电压的变化关系。结果表明，与采用正交偏振片的电光开关相比，法布里-珀罗电光开关的驱动电压大幅降低，由约2.1kV下降到约580V，产生光脉冲的上升沿明显缩短，由284μs减少至128μs。理论计算了法布里-珀罗电光开关透过特性随驱动电压的变化关系，计算结果与实验结果符合得较好。

In order to reduce the driving voltage of an electro-optical switch, a LiNbO3 crystal was placed in a Fabry-Perot cavity and the transmissive characteristics of this Fabry-Perot electro-optical switch was investigated experimentally. The results showed that the driving voltage of the Fabry-Perot electro-optical switch was ~580V, which was much lower than the half-wave voltage of an electro-optical switch used as orthogonal polarizer, ~2.1kV. Moreover, the rising time of the Fabry-Perot electro-optical switch, 128μs, was shorter than that of a switch used as orthogonal polarizer, 284μs. Theoretical analysis of transmitted characteristic dependence on driving voltage was performed, and the results were in accordance with the experimental results.