A microwave photonic filter based on multi-wavelength fiber laser and infinite impulse response  

作　　者：许东 曹晔 赵爱红 童峥嵘 

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5期325-328,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(No.2013AA014200);the National Natural Science Foundation of China(No.11444001);the Tianjin Natural Science Foundation(No.14JCYBJC16500)

摘　　要：A microwave photonic filter(MPF) based on multi-wavelength fiber laser and infinite impulse response(IIR) is proposed. The filter uses a multi-wavelength fiber laser as the light source, two sections of polarization maintaining fiber(PMF) and three polarization controllers(PCs) as the laser frequency selection device. By adjusting the PC to change the effective length of the PMF, the laser can obtain three wavelength spacings, which are 0.44 nm, 0.78 nm and 1.08 nm, respectively. And the corresponding free spectral ranges(FSRs) are 8.46 GHz, 4.66 GHz and 3.44 GHz, respectively. Thus changing the wavelength spacing of the laser can make the FSR variable. An IIR filter is introduced based on a finite impulse response(FIR) filter. Then the 3-d B bandwidth of the MPF is reduced, and the main side-lobe suppression ratio(MSSR) is increased. By adjusting the gain of the radio frequency(RF) signal amplifier, the frequency response of the filter can be enhanced.

关 键 词：photonic impulse microwave spacing infinite amplifier bandwidth adjusting maintaining interferometer 

分 类 号：TN713[电子电信—电路与系统] TN248