Programmable photonic RF filters based on an integrated Fabry-Pérot laser with a saturable absorber  

作　　者：徐真真 刘奕彤 刘嘉慧 王玲 孙文韬 孙振兴 陈向飞 Zhenzhen Xu;Yitong Liu;Jiahui Liu;Ling Wang;Wentao Sun;Zhenxing Sun;Xiangfei Chen(Key Laboratory of Intelligent Optical Sensing and Manipulation of the Ministry of Education&National Laboratory of Solid State Microstructures&College of Engineering and Applied Sciences&Institute of Optical Communication Engineering&Nanjing University-Tongding Joint Lab for Large-Scale Photonic Integrated Circuits,Nanjing University,Nanjing 210023,China)

机构地区：[1]Key Laboratory of Intelligent Optical Sensing and Manipulation of the Ministry of Education&National Laboratory of Solid State Microstructures&College of Engineering and Applied Sciences&Institute of Optical Communication Engineering&Nanjing University-Tongding Joint Lab for Large-Scale Photonic Integrated Circuits,Nanjing University,Nanjing 210023,China

出　　处：《Chinese Optics Letters》2024年第2期214-220,共7页中国光学快报（英文版）

基　　金：supported by the Chinese National Key Basic Research Special Fund(Nos.2018YFA0704402,2018YFB2201801,and 2018YFE0201200);the National Key ResearchandDevelopmentProgramofChina(No.2020YFB2205800);the National Natural Science Foundation of China(Nos.61975075,61975076,and 62004094);the Natural Science Foundation of Jiangsu Province(No.BK20200334);the Jiangsu Science and Technology Project(No.BE2017003-2)。

摘　　要：We propose and experimentally demonstrate the programmable photonic radio frequency(RF)filters based on an integrated Fabry-Pérot laser with a saturable absorber(FP-SA).Owing to the high output power and the relative flatness spectrum of the FP-SA laser,only a waveshaper and an erbium-doped fiber amplifier(EDFA)were needed,which can greatly reduce the complexity of the system.The sinc filter employed 87 taps,representing a record-high tap number and resulting in a 3-d B bandwidth of 0.27 GHz and a quality factor of 148.Furthermore,Gaussian apodization enabled the out-of-band rejection of the filter to reach 34 d B and the center frequency to be finely tuned over a wide range,spanning from 4 to 14 GHz.These results indicate that the proposed scheme could provide a promising guideline for the photonic RF filters that demand both high reconfigurability and greatly reduced size and complexity.

关 键 词：microwave filters microwave photonics passively mode-locked laser 

分 类 号：TN248[电子电信—物理电子学] TN713