合成了一种新的含偶氮基的三元共聚物，由于在主链中链接了柔性基团，使其具有相对较低的玻璃化温度，在６３３ｎｍ处光感生双折射δｎ值可达１０－３量级。实验上获得了几个乃至几百微米厚的具有高光学均匀性的薄膜，在６３３ｎｍ波长处写入的全息光栅的实时单光束衍射效率可达１０％以上。 A novel azo-containing terpolymer was synthesized. Due to the linkage of the flexible group in the main chain to a relatively low glass transition temperature, the value of δn induced by light-induced birefringence at 633 nm 10-3 magnitude. Experimentally, several or even hundreds of micrometers of films with high optical uniformity have been obtained. The real-time single-beam diffraction efficiency of holographic gratings written at 633 nm can reach more than 10%.