基于级联长周期光纤光栅的M-Z滤波器的优化设计  

Optimization of concatenated long-period fiber grating based M-Z filter

作　　者：康娟[1,2] 李孟超[1] 董新永[2] 张在宣[2] 金尚忠[2] 

机构地区：[1]上海理工大学光电信息与计算机工程学院,上海200093 [2]中国计量学院光电子技术研究所,浙江杭州310018

出　　处：《光电子．激光》2011年第8期1130-1133,共4页Journal of Optoelectronics·Laser

基　　金：国家"973"计划资助项目(2010CB327804);浙江省公益技术应用研究资助项目(2010C33056);浙江省重大科技专项资助项目(2009C11049)

摘　　要：利用传输矩阵法对级联长周期光纤光栅(LPFG)构成的马赫-曾德尔(M-Z)滤波器的滤波特性进行了模拟研究,针对提高滤波器的有效带宽和有效通道数进行了优化设计,并实验制备了多个M-Z滤波器,与模拟结果进行了对比。研究结果表明,该M-Z滤波器的有效带宽和有效通道数与单个LPFG的透射谱峰值损耗(TSPL)密切相关,可针对具体要求进行优化设计。当调节LPFG的TSPL从1.96dB增加到4.95dB时,满足10dB消光比要求的有效带宽从0.5nm增加到44.9nm;对于信道间隔为2nm的M-Z滤波器,有效通道数从1增加到22个。实验结果和理论计算相符合。The optimization of Mach-Zehnder （MZ） filter based on concatenated long-period fiber gratings （I.PFGs） is carried out by using the transfer matrix method,in order to increase the effective band width and channel number. Several MZ filters were manufactured for comparison. The research shows that the effective bandwidth and channel number of the MZ filters have a close relation with the transmission minimum of a single LPFG and can be used for optimization. It has been found that the effective bandwidth,where the extinction ratio is not less than 10 dB,can be increased from 0.5 nm to 44.9 nm by adjusting the transmission minimum of the individual LPFG from 1.96 dB to 4. 95 dB. For a M-Z fil ter with channel spacing of 2 nm,the channel number is increased from 1 to 22. Good agreement has been achieved between the experimental and the numerical results.

关 键 词：级联长周期光纤光栅(LPFG) 马赫-曾德尔(M-Z)滤波器 优化设计 有效带宽 

分 类 号：TN253[电子电信—物理电子学]