Abstract
We report the surface morphology and the nonlinear absorption characteristics of MXene VCrC nanosheets prepared by the liquid-phase exfoliation method. The self-made MXene VCrC was applied as a saturable absorber in the Tm:YAP laser experiments, performing excellent Q-switching optical modulation characteristics in infrared range. With this absorber, a stable passively Q-switched 2 μm laser was achieved. Under an incident pump power of 3.52 W, a maximum output power of 280 mW was obtained with a T = 3% output coupler at a repetition frequency of 49 kHz. The corresponding pulse energy and peak power were 5.7 μJ and 6.6 W, respectively. The shortest pulse duration was 658 ns at the repetition rate of 63 kHz with a T = 1% output coupler.
Highlights
Modulation Characteristics of MXeneNear-infrared (NIR) pulsed lasers have attracted more and more attention in various fields, such as laser surgery, material processing, environmental monitoring, and freespace communication [1,2,3]
The general formula of MXenes can be expressed as Mn+1 Xn Tx, wherein M refers to a transition metal element, X refers to element C or N, T represents the functional groups (O, F, and OH), and n = 1, 2, 3 [15]
MXenes have been widely used in the fields of energy storage, photo-electrochemical catalysis, photonics, and sensors, proved to be suitable for being utilized as the optical modulation devices [16,17]
Summary
Near-infrared (NIR) pulsed lasers have attracted more and more attention in various fields, such as laser surgery, material processing, environmental monitoring, and freespace communication [1,2,3]. Niu et al obtained a Tm:YAP Q-switched laser with the Nb2 CTX MXene SA, generating 1.96 μs pulse width at 1.94 μm [20]. The ordered double transition metals carbides M’M”C have been recently found as a new member of the MXenes family. The combination of both metals and mixed carbon-nitrides might potentially expand the range of accessible properties and applications greatly [21]. A new layered MXene VCrC with excellent metallic properties with near-zero energy band gap has aroused the interests of researchers. Further investigations on its surface morphology and the nonlinear absorption characteristics turn out to be urgent to satisfy requirements in developing novel passively Q-switched lasers.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
