Highly stable, passively mode-locked fiber laser with low pump power for subpicosecond pulse generation

Optical waveform monitoring based on a free-running mode-locked femtosecond fibre laser and four-wave mixing in a highly nonlinear fibre

“…Moreover, this mode−locked fibre laser can keep the mode− −locking operation continuously over 10 hours without the adjustment of any optical device in the laser cavity. In our pre− vious experiments, such a fibre laser was able to achieve the self−starting, passive mode locking at a low pump power of 29 mW for stable generation of femtosecond optical pulses [22], when a tunable optical delay line was not used in the laser cavity. A distinguishing feature of tunable repetition rate and low timing jitter for our developed passively mode−locked fibre laser allows the bit−rate flexible operation in a cost−effec− tive manner to meet the requirements of various users for opti− cal waveform monitoring applications.…”