摘要
对啁啾光栅阻带外的色散特性进行了深入理论分析,在WDM系统中往往需要光栅级联来完成单个光栅不能实现的功能,级联光栅时,前面光栅的阻带外色散要对接续在其后面的光栅产生影响,增大了光栅的时延波动。对光栅级联相互间的影响进行了理论分析与实验验证,提出了降低光栅间相互影响的方法是降低调制或光栅切趾,在光栅级联时采用高阶高斯切趾的效果最好。
We need several grating to cascade in order to compensate fiber dispersion in WDM communication system,but if gratings are cascaded, out - of - band dispersion can affect other following gratings, even making following gratings to be invalidation. Out-of-band dispersion makes following gratings delay ripple increased,or makes transmissive optical signal deformed. Detailed theoretical analysis and experiment have been done on out-of-band dispersion characteristics of cascaded chirped FBG(Fiber Bragg Grating). We have found novel method to reduce each orther interfere.
出处
《激光杂志》
CAS
CSCD
北大核心
2002年第4期45-46,共2页
Laser Journal
基金
国家"863"项目
国家自然科学基金
北方交通大学论文攀登基金资助