Impact of injection noise on locked starting of fiber lasers
It is reported that the mode-locking starting is achieved more quicker by injecting pulses noise into figureof-eight Yb3+-doped fiber laser.A detailed investigation about this phenomenon is presented in this paper.Analyzing the process of the mode-locking in the cavity,we discover the noise in the cavity does affect the mode-locking starting process of the fiber laser.During the experiment,when the pump power is 214.75 mW,the figure-of-eight Yb3+-doped fiber laser without injecting noise can generate locked-pulse in 30～50 seconds;while the pulses with duration of 30 ns,10 kHz repetition frequency,and 0.2 mW is injected into the cavity,the fiber laser can generate locked-pulse in 1~2 seconds.