Wavelength Tunable Mode-locked Pulse Fiber Laser Based on Figure-of-Eight Cavity
8字形腔波长可调谐锁模脉冲光纤激光器

Experimental study of the wavelength tunable passively mode-locked Er-doped fiber laser based on figure-of-eight cavity is presented. Wavelength tunable and stable mode-locked pulses are obtained by utilizing the additive pulse mode-locking technique based on nonlinear optical loop mirror associated with tunable fiber grating filter. On the condition that the pump power of EDFAs is fixed, by adjusting the tunable filter and orientation of polarization controllers, the mode-locked pulses at 1.1 MHz repetition rate with average output power fluctuation less than 0.8 dBm, and tunable range from 1 548 nm to 1 570 nm are obtained. The self-starting of the mode-locked fiber laser can be obtained, and the mode-locked operation can be hardly influenced by the environment disturbance.