基于非均匀取样布拉格光纤光栅Interleaver的设计

Design of optical Interleaver based on non-uniformly sampled FBG

对于光纤通信领域有限的带宽资源,波分复用与解复用器件Interleaver是未来密集型波分复用(DWDM)光纤通信网中的关键器件。为此结合非均匀取样光栅Interleaver的基本设计原理,运用耦合模理论和矩阵传输方法对非均匀取样光纤布拉格光栅的传输特性进行了数值模拟计算,并设计了信道间隔为0.8nm的设计实例,反射谱峰值均匀达到80%～95%,传输通道间隔稳定均匀,时延和色散均匀,时延抖动小于200ps。

The Interleaver used in the multiplexer or de-multiplexer is a key device of the future DWDM for the limited bandwidth resources in fiber-optic communication. Based on the coupling-mode theory, the transmission properties of non-uniformly sampled FBGs are numerically simulated with the transfer matrix method. The basic principle of optical Interleaver based on non-uniform sampled fiber gratings （SFBG） is introduced. The design example, whose channel interval is 0. 8 nm and the peak reflectivity is 80%-95%, is presented. The channel intervals are steady and uniform. The delay spectra of each channel are congruous, and the delay dither is less than 100 ps.