Abstract
Group VIB transition metal dichalcogenides (TMDs) have been successfully demonstrated as saturable absorbers (SAs) for pulsed fiber lasers. For the group comprising IVB TMDs, applications in this field remain unexplored. In this work, ZrS2-based SA is prepared by depositing a ZrS2 nanostructured film onto the side surface of a D-shaped fiber. The nonlinear optical properties of the prepared SA are investigated, which had a modulation depth of 3.3% and a saturable intensity of 13.26 MW/cm2. In a pump power range of 144–479 mW, the Er-doped fiber (EDF) laser with ZrS2 can operate in the dual-wavelength Q-switching state. The pulse duration declined from 10.0 μs down to 2.3 μs. The single pulse energy reached 53.0 nJ. The usage of ZrS2 as a SA for pulse generation in fiber lasers is presented for the first time. Compared to the experimental results of dual-wavelength Q-switched fiber lasers with two-dimensional (2D) materials, our laser performance was better. Our work indicates that the group comprising IVB TMD ZrS2 has bright prospects for nonlinear optical applications.
Highlights
Two-dimensional (2D) materials have recently garnered worldwide interest because of their photoelectric, mechanical, chemical and thermal attributes [1,2,3]
In the last few years, the 2D nanomaterials mentioned above have been widely used as saturable absorbers (SAs) in pulsed lasers, which possess the advantages of wideband nonlinear optical response, high third-order nonlinear susceptibility, high carrier mobility and powerful interaction between light and materials [22,23,24]
Our work demonstrates that the ZrS2 nonlinear optical material has bright prospects for pulsed laser applications
Summary
Two-dimensional (2D) materials have recently garnered worldwide interest because of their photoelectric, mechanical, chemical and thermal attributes [1,2,3]. Many other 2D materials, including topological insulators (TIs) [6], transition metal dichalcogenides (TMDs) [7,8,9], antimonene [10], bismuthene [11], perovskites [12], MXenes [13,14] and black phosphorus [15] possess complementary properties to graphene. These 2D materials have fruitful uses in optoelectronic devices [16,17,18]. In the last few years, the 2D nanomaterials mentioned above have been widely used as SAs in pulsed lasers, which possess the advantages of wideband nonlinear optical response, high third-order nonlinear susceptibility, high carrier mobility and powerful interaction between light and materials [22,23,24]
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