Dual wavelength filtering properties and applications of the π-phase-shifted sampled fiber Bragg gratings  

作　　者：姜俊英 张爱玲 田力 

机构地区：[1]Tianjin Key Laboratory of Film Electronics and Communication Devices,Communication Device and Technology Engineering Research Center,Ministry of Education,Tianjin University of Technology

出　　处：《Optoelectronics Letters》2011年第1期10-14,共5页光电子快报（英文版）

基　　金：supported by the National Natural Science Foundation of China (No.60808004);the Fund of New Century Excellent Talents in University (No.NCET-07-0611);Tianjin Natural Science Foundation (No.08JCYBJC14500)

摘　　要：Multi-π-phase-shifted fiber Bragg gratings and π-phase-shifted sampled fiber Bragg gratings(SFBGs) with dual wavelength filtering properties are compared.Results show that both of these gratings have the dual wavelength reflective spectra.However,the side lobe of the reflective spectrum of π-phase-shifted SFBGs is lower than that of multi-π-phaseshifted gratings.By adjusting the duty cycle in the range of 0.66-0.80,the filtering properties of π-phase-shifted SFBGs are optimized,and the side lobe suppression ratio(SLSR) is the lowest when the duty cycle is 0.75.The application of the π-phase-shifted SFBGs in the dual-wavelength laser is also demonstrated.Multi-π-phase-shifted fiber Bragg gratings and π-phase-shifted sampled fiber Bragg gratings（SFBGs） with dual wavelength filtering properties are compared.Results show that both of these gratings have the dual wavelength reflective spectra.However,the side lobe of the reflective spectrum of π-phase-shifted SFBGs is lower than that of multi-π-phaseshifted gratings.By adjusting the duty cycle in the range of 0.66-0.80,the filtering properties of π-phase-shifted SFBGs are optimized,and the side lobe suppression ratio（SLSR） is the lowest when the duty cycle is 0.75.The application of the π-phase-shifted SFBGs in the dual-wavelength laser is also demonstrated.

关 键 词：取样光纤布拉格光栅 双波长激光 滤波特性 相移 应用 取样光纤光栅 反射光谱 调整范围 

分 类 号：TN253[电子电信—物理电子学]