一种新型光交错复用器的设计  

Design of a New Type Interleaver

作　　者：张娟[1] 刘立人[1] 周煜[1] 周常河[1] 

机构地区：[1]中国科学院上海光学精密机械研究所,上海201800

出　　处：《光学学报》2003年第12期1424-1428,共5页Acta Optica Sinica

基　　金：国家自然科学基金(60 1770 16);上海市科委光科技计划(0 12 2 610 11);国家杰出青年基金(60 12 5512 )资助课题

摘　　要：提出了一种偏振光干涉型光交错复用器的新结构。其核心元件双折射模拟波片等效于双折射晶体波片 ,可以获得比一般双折射晶体大得多的等效双折射。该光交错复用器除了具有一般偏振光干涉型光交错复用器的稳定性好、可靠性高的特点外 ,特别具有隔离度更高和更容易实现各种大小频率间隔的优点。利用该结构设计了用于 50GHz频率间隔波分复用信号的奇偶分离的光交错复用器 ,通带和阻带的平坦宽度均大于 1/ 5周期 ,隔离度为 -3 0dB。同时 ,对该器件在实际应用中的几个基本参量 ,如插入损耗、偏振相关损耗和成本等也作了分析和讨论。A new structure of polarized light interference interleaver is presented. The key component of the interleaver is birefringent analog waveplate. It is equivalent to a birefringent crystal. The equivalent birefringence can be much larger than that of a conventional birefringent crystal. The interleaver has the characteristics of good stability, high reliability that the general polarized light interference interleaver possesses. Moreover, it has much higher isolation and can more easily realize any size of frequency spacing. An interleaver with the frequency spacing of (50 GHz) is designed. The flatness width of passband and stopband are both greater than 1/5 period, and the channel isolation is -30 dB. Several parameters in practical applications of this device, such as insertion loss, polarization dependent loss and cost are analyzed and discussed as well.

关 键 词：光纤通信技术 密集波分复用 光交错复用器 双折射 偏振光干涉 插入损耗 偏振损耗 掺铒光纤放大器 

分 类 号：TN929.11[电子电信—通信与信息系统]