2-μm mode-locked nanosecond fiber laser based on MoS<sub>2</sub> saturable absorber

2-μm mode-locked nanosecond fiber laser based on MoS₂ saturable absorber

Wang Xiao-Fa^†, Peng Xiao-Ling, Jiang Qiu-Xia, Gu Xiao-Hui, Zhang Jun-Hong, Mao Xue-Feng, Yuan Su-Zhen

(color online) Experimental results: (a) pulse train at a pump power of 1.45 W (inset: single pulse envelope), (b) repetition rate and pulse width versus pump power, (c) RF spectrum at 3.73 MHz repetition rate, (d) RF spectrum with a span of 100 MHz, (e) optical spectrum, and (f) average output power versus pump power.