相移长周期光栅长度切趾光谱特性

Length Apodization Spectral Characteristics of the Phase-shifted Long-period Fiber Gratings

应用耦合模理论和传输矩阵法分析了长周期相移光栅的光谱特性,比较了折射率切趾和长度切趾所产生的不同光谱结构,并分析了长度切趾中不同的切趾函数及光栅长度对光谱结构的影响.讨论了长度切趾的旁瓣增强效应,发现了一些新的有益结果.

By using the eoupled-rnode theory and transmit matrix, the spectral characteristics of phaseshifted long-period fiber gratings was analyzed. The difference between the index apodization and length apodization on the phase-shifted long-period fiber gratings were also discussed. The result shows that spectral caused by different apodized function is totally different in length apodization.