8字形腔波长可调谐锁模脉冲光纤激光器

采用非线性光纤环形镜加脉冲锁模技术及可调谐光纤光栅滤波器，对8字形腔被动锁模掺铒光纤激光器进行了波长可调谐输出的实验研究.在EDFA抽运光功率一定的情况下，通过调节偏振控制器和可调谐光纤光栅滤波器，获得了光谱稳定、重复频率1.1 MHz、输出功率起伏小于0.8 dBm、中心波长在1 548~1 570 nm内连续可调的短脉冲输出.该激光器可实现自启动锁模，且长时间稳定工作无需任何调整.

Wavelength Tunable Mode-locked Pulse Fiber Laser Based on Figure-of-Eight Cavity

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.