提出了用扩钛和质子交换相结合的方法在x-切,y-传的LiNbO3 衬底上制成TM 通集成光波导偏振器的新方案, 即在扩钛波导两侧的适当位置引入锯齿形的质子交换区。用二维BPM法分析了这类新型偏振器的消光特性, 给出了质子交换区几何形状以及质子交换区与扩钛波导之间的间隙对TE波消光比的影响, 给出了数值分析结果, 并得到了优于23 dB的实验结果 A new scheme of TM-integrated optical waveguide polarizer fabricated on x-cut and y-pass LiNbO3 substrates by the method of combining titanium expansion and proton exchange is proposed. That is, a sawtooth is introduced at appropriate positions on both sides of the titanium expanded waveguide Shaped proton exchange zone. The extinction characteristics of these new polarizers were analyzed by two-dimensional BPM method. The influence of the geometry of the proton exchange zone and the gap between the proton exchange zone and the expanded titanium waveguide on the extinction ratio of TE wave was given. Numerical analysis results , And got better than 23 dB experimental results