高速大动态范围偏振消光比测试技术

Measuring Technology of Polarization Extinction Ratio with High Speed and Wide Dynamic Range

在保偏传感系统、高速电光调制系统和无源光器件的研制、生产和维护中,对偏振消光比的指标要求逐渐提高,为此提出了一种高速大动态范围偏振消光比测试技术。首先阐述了旋转检偏法的基本原理,然后介绍了本技术中使用的对数放大器功率探测方法,最后将普通型偏振消光比测试仪和改进型偏振消光比测试仪的测试结果进行了对比。结果表明,改进后的偏振消光比测试技术提高了消光比测试的速度和动态范围,解决了当前测试技术存在的问题,因此满足市场中的相关需求。

In the development,production and maintenance of polarization-maintaining sensing systems,high-speed electro-optical modulation systems and passive optical devices,the requirement for the polarization extinction ratio is gradually increasing.For this purpose,a measuring technology of polarization extinction ratio with high speed and wide dynamic range is proposed.First,the basic principle of the rotation analysis method is described,then the power detection method of the logarithmic amplifier used in this technology is introduced,and finally the test results of the ordinary polarization extinction ratio tester and the improved polarization extinction ratio tester are compared.The results show that the new measuring technology of polarization extinction ratio improves the speed and dynamic range of the extinction ratio test,solves the problems of the current measuring technology,and therefore meets the relevant needs in the market.