ABSTRACT
A reconfigurable and tunable Microwave Photonic Filter (MPF) using a Multi-wavelength Hybrid-gain-assisted Fiber Ring Laser (MHFRL) and a dispersive medium is proposed and experimentally demonstrated. In the scheme, the MHFRL is mainly configured by a High Birefringence Fiber Loop Mirror (Hi-Bi FLM) and a hybrid gain medium. Stable multi-wavelength output can be generated from the MHFRL and serves as multiple taps for the MPF. By adjusting the bias of SOA, the number of multiple taps can be varied, making the MPF’s bandwidth reconfigurable. In addition, by changing the length of Polarization Maintaining Fiber (PMF) in the Hi-Bi FLM, the wavelength spacing of multiple taps can be varied, making the MPF’s Free Spectral Range (FSR) tunable. The proposed MPF has the merits of good flexibility, stability, and great potential of applications.
