A band-pass microwave photonic filter based on Lyot- Sagnac filter and cascaded optical structures  

作　　者：张爱玲 黄聪 吴晓君 

机构地区：[1]Tianjin Key Lab.of Film Electronics and Communication Devices,Communication Devices and Technology Engi-neering Research Center,Ministry of Education,Tianjin University of Technology

出　　处：《Optoelectronics Letters》2014年第1期5-8,共4页光电子快报（英文版）

基　　金：the National Natural Science Foundation of China(No.61377075);the New Century Excellent Talents in University(No.NCET-07-0611);the Middle-age and Yong Backbone Talents Training Plan in Tianjin

摘　　要：A band-pass microwave photonic filter(MPF)based on Lyot-Sagnac filter and two cascaded optical structures is demonstrated.In the experiment,a stabilized and tunable multi-wavelength optical source is obtained by slicing the broadband optical source(BOS)with a Lyot-Sagnac filter.A standard single-mode fiber(SMF)and a fiber ring resonator are cascaded to improve the mainlobe-to-sidelobe suppression ratio(MSSR)and Q-factor of the filter.The analysis shows that MSSR and Q-factor are improved by reducing the split ratio of the coupler or increasing the length of fiber in fiber ring resonator.The results have significant guidance for MPF design by choosing appropriate devices and parameters.Based on the analyses,a band-pass filter with MSSR of 53.54 dB and Q-factor of 4048 is achieved by choosing the split ratio of0.01,the length of SMF of 30 km and the length of fiber in fiber ring resonator of 152.27 cm.A band-pass microwave photonic filter（MPF）based on Lyot-Sagnac filter and two cascaded optical structures is demonstrated.In the experiment,a stabilized and tunable multi-wavelength optical source is obtained by slicing the broadband optical source（BOS）with a Lyot-Sagnac filter.A standard single-mode fiber（SMF）and a fiber ring resonator are cascaded to improve the mainlobe-to-sidelobe suppression ratio（MSSR）and Q-factor of the filter.The analysis shows that MSSR and Q-factor are improved by reducing the split ratio of the coupler or increasing the length of fiber in fiber ring resonator.The results have significant guidance for MPF design by choosing appropriate devices and parameters.Based on the analyses,a band-pass filter with MSSR of 53.54 dB and Q-factor of 4048 is achieved by choosing the split ratio of0.01,the length of SMF of 30 km and the length of fiber in fiber ring resonator of 152.27 cm.

关 键 词：带通滤波器 微波光子 光学结构 级联 光纤环形谐振腔 环形谐振器 单模光纤 多波长光源 

分 类 号：TN713[电子电信—电路与系统]