Microwave photonic notch filter with complex coefficient based on four wave mixing  

作　　者：许东 曹晔 童峥嵘 杨菁芃 

机构地区：[1]Communication Devices and Technology Engineering Research Center, School of Computer and Communication Engineering, Tianjin University of Technology [2]School of Electronic and Information Engineering, Qingdao University

出　　处：《Optoelectronics Letters》2016年第6期417-420,共4页光电子快报（英文版）

基　　金：supported by the National High Technology Research and Development Program of China(863 Program)(No.2013AA014200);the National Natural Science Foundation of China(No.11444001);the Municipal Natural Science Foundation of Tianjin(No.14JCYBJC16500)

摘　　要：A microwave photonic notch filter with a complex coefficient is proposed and demonstrated based on four wave mixing(FWM). FWM effect of two single-frequency laser beams occurs in a highly nonlinear fiber(HNLF), and multi-wavelength optical signals are generated and used to generate the multi-tap of microwave photonic filter(MPF). The complex coefficient is generated by using a Fourier-domain optical processor(FD-OP) to control the amplitude and phase of the optical carrier and phase modulation sidebands. The results show that this filter can be changed from bandpass filter to notch filter by controlling the FD-OP. The center frequency of the notch filter can be continuously tuned from 5.853 GHz to 29.311 GHz with free spectral range(FSR) of 11.729 GHz. The shape of the frequency response keeps unchanged when the phase is tuned.

关 键 词：notch photonic mixing tuned processor microwave unchanged continuously tunable modulator 

分 类 号：TN713[电子电信—电路与系统]