Abstract
A 1011 nm pulsed Yb³⁺-doped fiber laser is experimentally demonstrated by employing a commercially available LiNbO₃ phase modulator (PM) in the linear cavity. The resonator is built up with a section of normal single-cladding Yb³⁺-doped fiber, a PM, and a pair of fiber Bragg gratings. Active mode-locked stable trains of pulses with 2 and 1.4 ns are generated at repetition rates of 30.2478 and 60.4956 MHz, respectively. The maximum average output power is 10.6 mW at pump power of 200 mW, with the slope efficiency of 13.3%. Relaxation-oscillation-modulated pulses with width of 2 μs are obtained at a repetition rate of 27.778 kHz.
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