复合二维材料GO-MoS_2锁模掺铒光纤激光器

Composite two-dimensional material GO-MoS_2-based passively mode-locked Erbium-doped fiber laser

为了提升MoS_2可饱和吸收体在脉冲激光器中的稳定性和工作性能,本论文采用氧化石墨烯(GO)作为胶体表面活性剂,通过LPE的方法剥离出少层MoS_2,并进一步开展了少层GO-MoS2用于掺铒光纤激光器(EDFL)锁模的实验研究。在实验中获得了中心波长为1558 nm,重复频率为7.86 MHz,脉宽为1.9 ps的稳定锁模脉冲激光。当泵浦功率为60.5 mW时,输出功率为0.48 mW,脉冲峰值功率为32.1 W。研究证明,采用这种方法制备的新型复合二维材料有利于保持少层MoS_2的稳定性,并且能提高MoS_2可饱和吸收体的损伤阈值,以获取更大脉冲能量的超快激光。

In this paper,for improving the performance and stability of MoS2 saturable absorber,graphene oxide(GO)as colloidal surfactant is used to exfoliate MoS2 bulk material for obtaining few-layer GO-MoS2 nano-flakes.Further research on few-layer GO-MoS2 saturable absorber to mode-lock erbium-doped fiber laser(EDFL)is then conducted.In the experiment,a stable mode-locked pulsed laser is achieved with a center wavelength of 1558 nm,a repetition rate of 7.86 MHz and a pulse width of 1.9 ps.When the pump power reaches 60.5 mW,the output power is 0.48 mW and the pulse peak power is calculated to be 32.1 W.This work shows that the new composite 2D material prepared by this method is beneficial to maintain the stability of few-layer MoS2 and increase the damage threshold of the MoS2 saturable absorber for passive mode-locking.