介绍了用钒酸钇晶体的与偏振无关的WEｄGE型光隔离器的基本原理, 用琼斯矢量法得到了插入损耗和隔离度的数学表达式, 并介绍了隔离器的结构设计.制作的隔离器光纤到光纤的插入损耗为1.04 dB, 隔离度为42 dB, 回程损耗为44.3 dB, 偏振灵敏度≤0.2 dB, 带宽大于40 nm, 体积为10×10×40 mm3.

The radical principle of a POlarization- independent optical isolator using YVO4 wedge is presented in this paper. The formula of the insertion loss and isolation are obtained by Jones Matrix and the configuration of the isolator is given. The authors have manufactured this kind of isolator and the experiment showed that a fiber to fiber insertion loss was 1. 04 dB,the isolation was 42 dB, the return loss was 44. 3 dB, the polarization sensitivity was less than 0. 2 dB, and the bandwidth was more than 40 nm. The dimension of the isolator is 10×10×40 mm3.