环境影响对光栅偏振相关损耗影响的建模与预测  

Modeling and prediction of environmental effects on grating polarization-related losses

作　　者：代术华 张婷婷 DAI Shuhua;ZHANG Tingting(Jiangxi Institute of Engineering,Xinyu Jiangxi 338029,China)

机构地区：[1]江西工程学院,江西新余338029

出　　处：《激光杂志》2022年第11期210-214,共5页Laser Journal

基　　金：江西省教育厅科技项目(No.GJJ202911)。

摘　　要：研究环境影响对光栅偏振相关损耗影响的建模与预测方法,避免偏振问题限制光通信传输质量和传感测量效果的进一步提升。深入分析光栅偏振相关损耗原理,根据耦合模理论获得温度和光栅反射光及透射光的偏振相关损耗之间的关系,从有效折射率变化和光栅周期变化两方面出发,使用胡克定理获得横向压力和光栅反射光的偏振相关损耗之间的关系,实现光栅偏振相关损耗影响的建模与预测。实验结果表明:光栅偏振相关损耗存在两个锐利的峰,在温度升高时均以线性趋势向长波方向移动,且峰值稳定在30 dB~40 dB之间,温度对光栅偏振相关损耗影响较小;横向压力对光栅偏振相关损耗影响较大,但在达到一定压力后,影响会逐渐减小,光栅偏振相关损耗左峰对横向压力的灵敏度很高。The modeling and prediction method of the influence of environment on the polarization related losses of grating are studied to avoid the polarization problem and limit the further improvement of optical communication transmission quality and sensing measurement effect. The principle of polarization dependent loss of grating is deeply analyzed. According to the coupled mode theory, the relationship between temperature and polarization dependent loss of grating reflected light and transmitted light is obtained. Starting from the change of the effectiverefractive index and grating period, the relationship between transverse pressure and polarization dependent loss of grating reflected light is obtained by the Hooke theorem. The modeling and prediction dependent loss are realized. The experimental results show that there are two sharp peaks in the polarization loss, which move linearly to the long wave direction when the temperature increases, and the peak value is stable between 30~40 dB, and the temperature has little effect on the loss. The transverse pressure has a great influence on the polarization loss, but after reaching a certain pressure, the influence will gradually decrease. The left peak loss is highly sensitive to the transverse pressure.

关 键 词：环境影响 光栅偏振 相关损耗 建模与预测 有效折射率 横向压力 

分 类 号：TN253[电子电信—物理电子学]