级联长周期光纤光栅梳状滤波器的设计  

Design of cascaded long period fiber grating comb filter

作　　者：陶继红 王鑫玉 凌强 郁张维 陈达如 TAO Jihong;WANG Xinyu;LING Qiang;YU Zhangwei;CHEN Daru(Hangzhou Institute of Advanced Studies,Zhejiang Normal University,Hangzhou 311200,China)

机构地区：[1]浙江师范大学杭州高等研究院,浙江杭州311200

出　　处：《浙江师范大学学报（自然科学版）》2023年第2期146-151,共6页Journal of Zhejiang Normal University:Natural Sciences

基　　金：浙江省自然科学基金资助项目(LGG18F050004,LQ19F050005,LY19F050014,LY19F050015)。

摘　　要：为了灵活扩大通信容量,设计了一种级联长周期光纤光栅(cascade long period fiber grating,CLPFG)结构的光纤梳状滤波器,并对其进行了系统的理论研究,重点讨论了光栅周期、光栅长度、间隔光纤长度和光栅段数等级联光栅参量对梳状滤波特性的影响.结果表明:间隔光纤长度和光栅段数能够有效调谐信道3 dB带宽和信道间隔;通过优化设计,可以实现对称性和非对称性梳状滤波器的设计.这种梳状滤波器具有结构紧凑、工作带宽大、信道带宽及设计灵活等优点.In order to flexibly expand the communication capacity,a fiber comb filter based on cascaded long period fiber Grating(CLPFG)structure was proposed and theoretically studied.The effects of some parame-ters including grating period,grating length,interval fiber length and grating segment number on the charac-teristics of comb filter were discussed.The results showed that the spacing fiber length and the number of grat-ing segments could effectively tune the channel 3 dB bandwidth and channel spacing,and the symmetric and asymmetric comb filters could be realized by optimizing the design.The proposed comb filter had the advanta-ges of compact structure,large working bandwidth and flexible design of channel bandwidth.

关 键 词：光纤滤波器 梳状滤波器 长周期光纤光栅 级联光栅 滤波特性 

分 类 号：TN253[电子电信—物理电子学]