Wang Yadong, Mao Dong, Gan Xuetao, Han Lei, Ma Chaojie, Xi Teli, Zhang Yi, Shang Wuyun, Hua Shijia, Zhao Jianlin
Opt Express. 2015 Jan 12;23(1):205-10. doi: 10.1364/OE.23.000205.
We present a kind of harmonic mode locking of bound-state solitons in a fiber laser based on molybdenum disulfide (MoS(2)) saturable absorber (SA). The mode locker is fabricated by depositing MoS(2) nanosheets on a D-shaped fiber (DF). In the fiber laser, two solitons form the bound-state pulses with a temporal separation of 3.4 ps, and the bound-state pulses are equally distributed at a repetition rate of 125 MHz, corresponding to 14th harmonics of fundamental cavity repetition rate (8.968 MHz). Single- and multiple-pulses emissions are also observed by changing the pump power and optimizing the DF based MoS(2) SA. Our experiment demonstrates an interesting operation regime of mode-locked fiber laser, and shows that DF based MoS(2) SA can work as a promising high-power mode locker in ultrafast lasers.
我们展示了一种基于二硫化钼（MoS₂）可饱和吸收体（SA）的光纤激光器中束缚态孤子的谐波锁模。锁模器是通过在D形光纤（DF）上沉积MoS₂纳米片制成的。在光纤激光器中，两个孤子形成时间间隔为3.4 ps的束缚态脉冲，且束缚态脉冲以125 MHz的重复频率均匀分布，对应于基本腔重复频率（8.968 MHz）的第14谐波。通过改变泵浦功率和优化基于DF的MoS₂ SA，还观察到了单脉冲和多脉冲发射。我们的实验展示了锁模光纤激光器的一种有趣工作模式，并表明基于DF的MoS₂ SA可作为超快激光器中有前景的高功率锁模器。
