基于串联耦合双循环延时线的可重构光电振荡器  

A reconfigurable optoelectronic oscillator based on series-coupled double recirculating delay lines

作　　者：李城鑫[1] 陈福深[1] 陈开鑫[1] 

机构地区：[1]电子科技大学通信与信息工程学院,四川成都611731

出　　处：《光电子．激光》2014年第7期1237-1241,共5页Journal of Optoelectronics·Laser

基　　金：国家自然科学基金(61177054)资助项目

摘　　要：针对光电振荡器(OEO)系统,设计了一种可实现滤波功能的串联耦合双循环延时线(SCDRDLs),并与放大自发辐射(ASE)宽带激光源、Mach-Zehnder调制器(MZM)、偏振分束器(PBS)相结合形成微波光子滤波器(MPF)。利用结构中ASE宽带激光源相干时间小于SC-DRDLs固有延时的特性,实现MPF的非相干性。同时SC-DRDLs的双循环延时线级联特性,决定系统具有大的自由频谱范围,再结合其双输出端口与PBS形成的双环结构,完成系统的高边摸抑制性能。理论分析和实验结果表明,本文系统能产生高频谱纯度、长期稳定性和低相位噪声的微波信号;通过改变SC-DRDLs的环长,可对MPF进行重构,进而调谐振荡频率。A series-coupled double recirculating delay line （SC-DRDL） with fi lter response is designed based on optoelectronic oscillator （OEO） system,which can form a microwave photonic filt er （MPF） by combination of an amplified spontaneous emission （ASE） source,a Mach-Zehnder modulator （MZM） and a polarization beam splitter （PBS）.In the structure,the incoherence can be performed due to the coherence t ime of the ASE source is much smaller than the delay of the SC-DRDLs.Meanwhile,the large free spectral range of the system can be obtained by series characteristics of the double recirculating delay lines for SC-DRDLs,along with utili zation of the dual-loop system between the dual outputs of the SC-DRDLs and PBS,So the high sidemode suppression perf ormance is achieved.A detailed theoretical analysis is provided,which is verified by experiment.A microwave s ignal with high spectral purity,long-term stability and low single-sideband （SSB） phase noise is generated.In addition,by changing the loop lengths of the SC-DRDLs, the MPF is reconfigured and the oscillation frequency of the OEO can be simply t uned.

关 键 词：光电振荡器(OEO) 微波光子滤波器(MPF) 微波产生 可重构 

分 类 号：TN929.1[电子电信—通信与信息系统]