基于SBS的微波光子滤波器技术研究  

Research on Microwave Photonic Filter Based on SBS

作　　者：龚静文 李小军[1] 蒋炜[1] 梁栋[1] GONG Jingwen;LI Xiaojun;JIANG Wei;LIANG Dong(China Academy of Space Technology（Xi＇ an）,Key Laboratory of Science and Technology-on Space Microwave,Xi＇ an 710000,China)

机构地区：[1]中国空间技术研究院西安分院空间微波技术重点实验室,西安710000

出　　处：《空间电子技术》2018年第4期6-12,共7页Space Electronic Technology

基　　金：国家自然科学基金重点项目(61231012)

摘　　要：文章针对微波域滤波器只能对提前设计好的特定频段、特定带宽使用的局限性而提出微波光子滤波器,其中,基于受激布里渊散射效应(SBS)的微波光子滤波器不仅拥有可调谐、可重构特性,而且由于其阈值低、调谐范围大和系统稳定性较好等优点而引起广泛关注。文章对比总结了从2011年以来国内外学者在该滤波器方面取得的重大研究成果并得出其未来的发展趋势。选取性能更优越的光频率梳技术进行SBS增益谱叠加,进而利用滤波器频谱带宽可重构的方法来实现基于SBS的滤波器设计。通过optisystem和matlab软件进行仿真分析,得到了3dB带宽为137MHz、形状因子为0.75、可调谐范围为0~20GHz的基于SBS的微波光子滤波器。从滤波器性能得出其可应用于包括卫星通信系统在内的各系统中的收发机,将大频率带宽范围的GHz宽带信号划分为并行的百MHz窄带信号,以便于用低频器件进行相关处理。Microwave photonic filters are proposed according to the requirements of tunable and reconfigurable universal filters in satellite communication systems. Due to the low threshold and easy control of complex coefficients,a large tuning range and fine system stability,microwave photonic filters based on StimulatedBrillouin Scattering（ SBS） effect have drawn much attention. We comparison and summarize the major research achievements of SBS-based filters from domestic and foreign scholars since 2011 and draw its future research trend in this paper. Using optical frequency comb to expand its spectrum bandwidth to meet the requirement of the filter＇s bandwidth reconfigurability,a design scheme of SBS filter is proposed.Through simulation analysis,a SBS filter with a 3 dB bandwidth of 137 MHz,a shape factor of 0. 75,and a tunable range of 0~ 20 GHz is obtained. Therefore,it can be applied to transceivers in various systems including satellite communication system. It divides GHz wideband signals in different frequency and bandwidth into parallel 100 MHz narrowband signal for ralated processing with low-frequency devices.

关 键 词：受激布里渊散射 微波光子学 滤波器 

分 类 号：V443[航空宇航科学与技术—飞行器设计]