Theoretical and experimental investigations on Nb₂CT _x MXene Q-switched Tm:YAP laser at 2 μm for the nonlinear optical response

Abstract

In this paper, the Nb 2 CT x MXene nanosheets were fabricated and the corresponding microstructures were investigated. The nonlinear optical response was illustrated by open aperture Z-scan and I-scan methods. The ground and the excited state absorption cross-sections of 2D Nb 2 CT x MXene were also investigated. As the saturable absorber (SA), the Nb 2 CT x MXene was applied in the passively Q-switched Tm:YAP laser. 1.96 μs Q-switched pulses with 3.97 W peak power were achieved at the repetition frequency of 80 kHz. Further theoretical model was built by using the coupled rate equations in simulating the dynamic process of the passively Q-switched Tm:YAP laser. The numerical simulation results are fundamentally in agreement with the experimental results, which proves the Nb 2 CT x MXene can be a good potential nanomaterial for further optoelectronic applications.

Layered Metallic Vanadium Disulfide for Doubly Q-Switched Tm:YAP Laser with EOM: Experimental and Theoretical Investigations

“…To understand the Q-switching mechanism based on the SA and EOM, a coupled rate-equation model with plane wave approximation is proposed, as follows [12,[38][39][40][41]:…”

Operation of a passively mode‐locked Tm:YAG laser with tantalum aluminum carbide as a saturable absorber

“…There have been several studies using MXene materials as SAs (2019-2021). [26][27][28] various passively Q-switched (PQS) solid-state lasers using MXene-SAs have been realized (2017-2022). [29][30][31][32] Researchers have also realized PML fiber lasers based on MXene-SAs.…”

“…The excellent nonlinear absorption and modulation depth, band gap tunability, and high electron density at the Fermi level are the elements that enable MXene to serve as an excellent SA. There have been several studies using MXene materials as SAs (2019–2021) 26–28 . various passively Q‐switched (PQS) solid‐state lasers using MXene‐SAs have been realized (2017–2022) 29–32 .…”

Investigation of Nonlinear Optical Modulation Characteristics of MXene VCrC for Pulsed Lasers

“…It was reported that a Q-switched Tm, Gd:CaF2 laser at 1.93 μm band was demonstrated by Zu et al, applying the Ti 3 C 2 T X MXene [ 19 ]. Niu et al obtained a Tm:YAP Q-switched laser with the Nb 2 CT X MXene SA, generating 1.96 μs pulse width at 1.94 μm [ 20 ].…”