基于光纤光栅Sagnac环的可调谐光电振荡器  

Tunable optoelectronic oscillator based on fiber grating Sagnac loop

作　　者：胡总华 聂奎营 阮毅 许江勇 王文龙 HU Zonghua;NIE Kuiying;RUAN Yi;XU Jiangyong;WANG Wenlong(College of Physics&Engineering Technology,Xingyi Normal University for Nationalities,Xingyi Guizhou 562400,China)

机构地区：[1]兴义民族师范学院物理与工程技术学院

出　　处：《光通信技术》2019年第6期17-20,共4页Optical Communication Technology

基　　金：贵州省教育厅青年科技人才成长项目(黔教合KY字[2017]360、黔教合KY字[2017]370)资助;贵州省科技厅联合基金项目(黔科合LH字[2016]7036号、黔科合LH字[2016]7039号)资助

摘　　要：为了有效解决光电振荡器频率调谐范围小的问题,提出了一种借助于宽带光源、臂长差可调谐的光纤光栅Sagnac环和一段色散光纤,在光电振荡器回路中构建一个频率可调谐的微波光子滤波器,实现光电振荡器输出频率大范围调谐的设计方案。光纤光栅Sagnac环的臂长差在0.50~8.28mm范围内变化,当最小变化步长为0.01mm时,该结构光电振荡器能够实现0.9915~16.4190GHz频率范围内的单一频率微波信号输出,频率调谐步长为19.8MHz,边模抑制比达到20dB。In order to effectively solve the problem of small frequency tuning range of the photoelectric oscillator,a design scheme of a frequency tunable microwave photonic filter in the optoelectronic oscillator circuit is proposed,which realizes wide frequency tuning of the output frequency of the optoelectronic oscillator by means of a broadband light source,a Sagnac ring with tunable arm length difference and a section of dispersion fiber.When the arm length difference of fiber grating Sagnac loop varies from 0.50~8.28mm and the minimum change step is 0.01mm,The structure of the photoelectric oscillator can achieve a single frequency microwave signal output in the frequency range of 0.9915~16.4190GHz,with frequency tuning step being 19.8MHz and the side mode rejection ratio being 20dB.

关 键 词：光电振荡器 光纤光栅 SAGNAC环 自由频谱范围 色散光纤 

分 类 号：TN929.1[电子电信—通信与信息系统]