光学电压传感器是重要的电压传感仪器，因其具有独特的优势，得到了越来越广泛的应用。提出并实现了一种新型准互易反射式集成光学电压传感器， 采用基于钛扩散技术制作的Y切Z传铌酸锂直波导作为电场敏感元件；采用全数字闭环负反馈检测技术和数字滤波技术处理信号，使其具有较大的动态范围和较好的线性度，同时可分离信号中的交直流信号，方便进行温补与交流电压的测量。搭建的实验光路互易性良好，在1.4~4600 V的工频交流电压下，系统测量的最大非线性误差仅为0.35%，80~4600 V的测量变比误差小于1%。

Optical voltage sensor is an important voltage sensing instrument which has been widely applied because of its unique advantages. We have proposed and accomplished a new type of quasi-reciprocal reflection type integrated optical voltage sensor, using Y-cut LiNbO3 waveguide based on Ti-diffused technique as the electric field sensor. All digital closed-loop negative feedback detection technology and digital filtering technology have been used to improve the dynamic range and linearity, the alternating current (AC) and direct current (DC) voltage which is benefit to temperature compensation and AC signal measurement are separated. The reciprocity of light path is good. Under the power-frequency voltage of 1.4~4600 V, the nonlinear error of measurement is less than 0.35% and transformation ratio error is less than 1% as AC voltage changing from 80~4600 V.