布拉格光栅辅助型上下话路滤波器的实验制作  

Experimental fabrication of add/drop filters using a Bragg grating-assisted mismatched coupler

作　　者：范林勇[1] 江微微[1] 李坚[1,2] 赵瑞峰[1] 郑斯文[1] 李焕路[1] 董小伟[1] 裴丽[1] 简水生[1] 

机构地区：[1]北京交通大学光波技术研究所,全光网络与现代通信网教育部重点实验室,北京100044 [2]铁道科学研究院通信信号研究所,北京100081

出　　处：《光电子．激光》2010年第4期492-495,共4页Journal of Optoelectronics·Laser

基　　金：国家自然科学基金资助项目(60771008);北京市自然科学基金资助项目(4082024);教育部博士点基金资助项目(200800040002)

摘　　要：采用波长为248nm的紫外光,在由标准单模光纤和自制的高掺锗光敏光纤熔融拉锥制作的2×2光纤失配耦合器上写入光纤光栅,实现了全光纤布拉格光栅(FBG)辅助失配耦合器型上下话路滤波器,并测试了器件的传输特性,器件的插入损耗和回波损耗分别为6.74dB和-18.84dB。用10Gbps的光信号进行了传输实验,分别测试了下话路前、后信号的眼图。与输入信号相比,下话路信号的信噪比从10.04dB降低到了9.27dB,信号的消光比从8.89dB降低到了4.68dB。All-fiber add/drop filter is a key component in the optical fiber communication system. Add/ drop filters using a Bragg grating-assisted mismatched coupler were fabricated and tested in the laboratory. The filter was based on 248 nm ultraviolet-written Bragg grating in 2 × 2 coupler fused with a stand- ard single mode fiber and a high germanium doped photosensitive fiber fabricated by our own laboratory. The insertion loss and the return loss of the device were 6.74 dB and --18. 84 dB,respectively. The per- formance of the device is tested at 10 Gbps networks. The eye diagram of the input signal and the eye diagram of the signal from the drop port of the device are obtained. The signal-to-noise ratio of the signal from the drop port declines from 10. 04 dig to 9.27 dB,and the extinction-ratio of the signal from the drop port declines from 8.89 dB to 4. 68 dB.

关 键 词：上下话路滤波器 光纤布拉格光栅(FBG) 耦合器 眼图 光纤通信 

分 类 号：TN929.11[电子电信—通信与信息系统]