En-ming Xu,Fei Wang,Pei-li Li.A high-Q microwave photonic filter by using an SOA-based active mode-locked fiber ring laser[J].Optoelectronics Letters,2013,9(2):97-100 A high-Q microwave photonic filter by using an SOA-based active mode-locked fiber ring laser Author Name Affiliation E-mail En-ming Xu  School of Opto-Electronic Engineering, Nanjing University of Posts and Telecommunications, Nanjing, 210046, China School of Opto-Electronic Information, Chongqing University of Technology, Chongqing, 400054, China  enmingxu@njupt.edu.cn  Fei Wang  School of Opto-Electronic Engineering, Nanjing University of Posts and Telecommunications, Nanjing, 210046, China School of Opto-Electronic Information, Chongqing University of Technology, Chongqing, 400054, China    Pei-li Li  School of Opto-Electronic Engineering, Nanjing University of Posts and Telecommunications, Nanjing, 210046, China School of Opto-Electronic Information, Chongqing University of Technology, Chongqing, 400054, China    Abstract:       A high-Q microwave photonic filter using a semiconductor optical amplifier (SOA)-based mode-locking fiber ring laser is proposed, analyzed and experimentally demonstrated. The proposed microwave photonic filter can realize a high-Q frequency response, it is compact without an optical source, and it can be easily tuned by adjusting an optical variable delay line in a ring cavity. A result with a Q-factor of about 236 and a rejection ratio of about 45 dB is obtained. The measured results and the theoretical estimations agree very well. Hits: 6930 Download times: 274 View Full Text    Download reader