Single- and dual-wavelength switchable mode-locked dissipative soliton Yb-doped fiber laser based on graphene/WS₂ nanocomposites modelocker and polarization controller

Abstract

We report a single- and dual-wavelength switchable mode-locked dissipative soliton in an ytterbium-doped fiber laser based on graphene/WS2 nanocomposites saturable absorber. The graphene/WS2 nanocomposites film possesses efficient saturable absorption characteristics with large modulation depth (45.1%), which results in the stable single-wavelength mode-locking operation with pulse duration of 450 ps. By carefully rotating the polarization controller, the mode-locking operation can be switched to a dual-wavelength at both 1066.4 nm and 1069.2 nm due to the modulation of the intracavity birefringence. Our work extends the studies for 2D nanomaterials and supplies potential applications in the multi-wavelength fiber laser.

Fabrication and Applications of Heterostructure Materials for Broadband Ultrafast Photonics

“…reported that graphene/tungsten disulfide (graphene/WS 2 ) produced by LPE had unique properties which graphene and WS 2 did not have. [ 78 ] In 2021, Xia et al. found that the heterostructure could enhance the stability of the SA material.…”

“…[74] In 2019, Ma et al reported that graphene/tungsten disulfide (graphene/ WS 2 ) produced by LPE had unique properties which graphene and WS 2 did not have. [78] In 2021, Xia et al found that the heterostructure could enhance the stability of the SA material. They generated black phosphorus/titanium carbide (BP/ Ti 3 C 2 ) powder and found that the properties remained stable for weeks.…”

“…In their work, the single-wavelength mode-locked operation centered at 1066.2 nm could be switched to a dualwavelength pulsed laser at both 1066.4 and 1069.2 nm by rotating the polarization controller. [78] In 2020, Zhang et al demonstrated a heterostructure consisting of Bi 2 Te 3 and iron ditelluride (FeTe 2 ). Both mode-locked and Q-switched operations were realized by the Bi 2 Te 3 /FeTe 2 SA.…”

Preparation and pulsed fiber laser applications of emerging nanostructured materials

“…223 Further experiments showed that the passively mode-locked EDFL by using the SnS 2 SA with a thickness of 108.7 nm has the best output characteristic in achieving ultra-short pulses (with pulse duration of 132.9 fs at 1561 nm). Heterostructure/composite nanostructures such as graphene-WS 2 , 224,266,267 MoS 2 -WS 2 , 268 WS 2 -MoS 2 -WS 2 , 269 MoS 2 -Sb 2 Te 3 -MoS 2 , 270 MoS 2 -SiO 2 , 271 and TaS 2 -SiO 2 272 were also used as the SA material for applications in passively mode-locked fiber lasers. In addition, a passively mode-locking fiber laser with TMDC-based SA was also observed due to the sub-band gap absorption.…”

Integration and Applications of Nanomaterials for Ultrafast Photonics

“…In 2019, Ma et al took a leap forward in the field of multiwavelength fiber laser. [131] With the help of graphene/WS 2 [128] Copyright 2013, IOP Publishing Ltd. nanocomposite, they managed to realize a YDFL that was able to switch the dissipative soliton's central wavelength between a single wavelength at 1066.2 nm and a dual-wavelength at both 1066.4 and 1069.2 nm. They successfully achieved a pulse duration of 450 ps and a repetition rate up to 19.68 GHz from a stable mode-locked operation with a single-wavelength at 1066.2 nm.…”