A variable coefficient microwave photonic filter based on multi-wavelength fiber laser and Mach-Zehnder interferometer  

作　　者：曹晔 刘策 童峥嵘 

机构地区：[1]Key Laboratory of Film Electronics and Communication Devices Tianjin University of Technology

出　　处：《Optoelectronics Letters》2014年第6期401-405,共5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.61107052);the Natural Science Foundation of Tianjin in China(No.14JCYBJC16500);the Science and Technology Development Fund Project of Tianjin University(No.2012)

摘　　要：A microwave photonic filter(MPF) with variable coefficient is proposed and demonstrated, which is constructed by a multi-wavelength fiber laser and Mach-Zehnder interferometer(MZI). Through changing the slope characteristics of Mach-Zehnder interference spectrum adjusted by optical variable delay line(OVDL), the conversion from phase modulation(PM) to intensity modulation(IM) is realized. The multi-wavelength fiber laser with Lyot-Sagnac optical filter has variable wavelength spacing. So the designed filter has a variable number of taps and tap weights. As a result, the tunable range of passband center frequency is 2.6 GHz. The reconfigurability of MPF can be also realized by adjusting the output of fiber laser.

关 键 词：Bandpass filters Fiber lasers Fibers MACH Zehnder interferometers Phase modulation 

分 类 号：TN248[电子电信—物理电子学] TN929.1