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利用掺镧锆钛酸铅(PLZT)陶瓷二次电光效应结合光纤环形镜结构的优势构成偏振无关高速电光开关。采用琼斯矩阵方法分析了光纤环形镜的输出特性,给出了开关消光比同器件结构参量之间的关系。测量掺镧锆钛酸铅电光开关具有输入偏振无关特性,光开关消光比达到25 dB,响应时间小于3μs。此外利用此开关装置测量获得了实验用掺镧锆钛酸铅陶瓷的克尔系数为κ~1.1×10-16m2/V2。理论分析和实验结果表明,利用环形镜结构稳定优势和掺镧锆钛酸铅优良的电光特性结合设计的高速光开关具有良好的应前景。本工作对掺镧锆钛酸铅电光材料的应用推广和高速光开光研究提供了有益的理论和实验参考。
The polarization-independent high-speed electro-optical switch is formed by utilizing the secondary electro-optical effect of the lanthanum-doped lead zirconate titanate (PLZT) ceramic combined with the advantages of the fiber ring mirror structure. The output characteristic of fiber loop mirror was analyzed by Jones matrix method, and the relationship between the extinction ratio and the structural parameters of the device was given. The measurement of Lanthanum-doped lead zirconate titanate electro-optical switch has the characteristics of input polarization independence, optical switch extinction ratio of 25 dB, response time of less than 3μs. In addition, the Kerr coefficient of the lanthanum-doped lead zirconate titanate ceramics for the experiment was measured with this switching device to be κ ~ 1.1 × 10-16m2 / V2. Theoretical analysis and experimental results show that the use of ring mirror structure stability advantage and lanthanum lead zirconate titanate excellent electro-optical properties combined with the design of high-speed optical switch has good prospects. This work provides a useful theoretical and experimental reference for the application of lanthanum-doped lead zirconate titanate electro-optical materials and the research of high-speed optical opening.