基于电吸收调制器的非相干可调谐微波光子滤波器  

A tunable incoherent photonic microwave filter based on electro-absorption modulator

作　　者：魏志虎[1] 王荣[1] 方涛[1] 蒲涛[1] 孙帼丹[1] 郑吉林[1] 

机构地区：[1]解放军理工大学通信工程学院,江苏南京210007

出　　处：《光电子．激光》2013年第6期1086-1089,共4页Journal of Optoelectronics·Laser

基　　金：国家"973"计划(2012CB315603);国家自然科学基金重点(NSFC-61032005);国家自然科学基金(NSFC-61177065;NSFC-61174199);江苏省自然科学基金(BK2012058)资助项目

摘　　要：提出一种新的基于电吸收调制器(EAM)的非相干可调谐光子滤波器。首先通过带通滤波器滤除EAM输出的一个边带,获得单边带调制;再通过调谐EAM的偏置端,使得边带所引入的相移随着偏置电压的改变而改变,这样就可以实现一个真相移(TPS)结构;然后引入另一个非相干光源和Mach-Zender调制器(MZM),利用两路信号的延时不同实现一个基本的滤波器;最后通过调谐偏置所引入的TPS实现滤波器的宽带可调谐,而滤波器的形状可以保持不变,其中滤波器的调谐范围由偏置所引入相移的变化范围来决定。A novel tunable incoherent photonic microwave filter based on electro-absorption modulator （EAM） is proposed in this paper. Firstly,when the EAM is modulated by a radio frequency （RF） signal, an optical single sideband is generated by filtering the lower sideband. Then an extra phase shift will be introduced to the upper sidebands of the modulated signal by simply changing the bias voltage applied on EAM. Because the chirp of EAM depends on the bias voltage applied on EAM,the extra phase shift can be introduced by the chirp. As a result,when it is detected by a photodetector （PD） ,a tunable phase shifter is realized. Finally, incorporating the phase shifter system with the other laser diode and delay line, a tunable two-tap incoherent photonic microwave filter with complex coefficient can be realized. The shape of the proposed filter won＇t be altered,and the filter can be tuned by adjusting the bias voltage.

关 键 词：微波光子学 电吸收调制器(EAM) 微波光子滤波器 可调谐 

分 类 号：TN929.11[电子电信—通信与信息系统]