运用新的线性电光效应的耦合波理论 ,对双轴晶体KTP电光调制器的温度特性进行了理论研究 .找到了一个入射光波矢的方向 ,在该方向上 ,出射光光强不随温度的变化而变化 ,而且此方向在一定的角度范围内变动 ,温度的稳定性是可以保持的 .还进一步对晶体的通光长度和外加电场的方向进行了筛选 ,实现了双轴晶体KTP电光调制器的最优设计 The temperature characteristics of a biaxial crystal KTP electro-optic modulator are studied theoretically by using the new coupled wave theory of linear electro-optical effect. A direction of the incident wave vector is found. In this direction, the intensity of the emitted light does not change with the temperature Changes, and this direction changes within a certain range of angles, the temperature stability can be maintained.Further further through the crystal length and the direction of the applied electric field were screened to achieve a biaxial crystal KTP electro-optical modulator Excellent design