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

Abstract

We demonstrated a 2-µm passively mode-locked nanosecond fiber laser based on a MoS 2 saturable absorber (SA). Owing to the effect of nonlinear absorption in the MoS 2 SA, the pulse width decreased from 64.7 to 13.8 ns with increasing pump power from 1.10 to 1.45 W. The use of a narrow-bandwidth fiber Bragg grating resulted in a central wavelength and 3-dB spectral bandwidth of 2010.16 and 0.15 nm, respectively. Experimental results show that MoS 2 is a promising material for a 2-µm mode-locked fiber laser.

Generation of Bright-Dark Soliton Pairs in Mode-Locked Fiber Laser Based on Molybdenum Diselenide

“…Mode-locked fiber laser has been widely used in these fields of material processing, radar sensing, biomedical, scientific researches, and so on [1]. Under different operating conditions, mode-locked fiber laser can generate different types of solitons, such as traditional soliton [2], dissipative soliton [3], self-similar soliton [4], dark soliton [5], soliton rain [6], and soliton bunch [7]. What is more, there also exist bright-dark soliton pairs in the mode-locked fiber laser, which have a broad application prospect in the fields of spectroscopy, optical communication and soliton evolution.…”

Generation of cavity-birefringence-dependent multi-wavelength bright–dark pulse pair in a figure-eight thulium-doped fiber laser*

“…The period of the pulse train is 1.34 µs, which matches with the cavity round-trip time, thus verifies the mode-locking operation of the TDFL. [27] The inset of Fig. 3(a1) shows the pulse profile of the bright-dark pulse pair.…”

MXene Ti 3 C 2 T x saturable absorber for pulsed laser at 1.3 μm

“…[6][7][8][9][10][11] Due to their special electronic and optical properties, such as high optical damage threshold, ultrafast recovery time, and controllable modulation depth, they have been applied to the fiber lasers and solid-state lasers. [12][13][14][15] However, some 2D materials need to be further optimized, for example, black phosphorus is easily oxidized, and the fabrication process of TIs is complex. So the development of promising novel nonlinear optical materials, especially the 2D materials, is still a longstanding goal.…”