局部横向压力下光纤布拉格光栅的偏振相关损耗特性研究
, PP. 45-49
Keywords: 光纤bragg光栅,局部横向作用力,偏振相关损耗,传输矩阵法
Abstract:
对均匀光纤bragg光栅(fbg)在局部横向作用力下透射信号的偏振相关损耗(pdl)特性进行了详细的理论分析和研究.建立了利用pdl实现横向应变传感的理论模型并采用传输矩阵法进行了数值模拟.分析表明,当fbg局部横向受力时,最大谐振峰随横向作用力大小呈周期变化,并且受力位置越接近fbg的中点,pdl光谱中的旁瓣越少,谐振峰的峰值越大.随着光栅受压长度的增大,最大谐振峰从长波长向短波长移动.
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