Theoretical and experimental investigations on doubly Q-switched Tm:YAP laser with EOM and Sb<sub>2</sub>Te<sub>3</sub> nanosheets
Ziqun Niu, Tianli Feng, Tao Li, Kejian Yang, Jia Zhao, Guiqiu Li, Dechun Li, Shengzhi Zhao, Wenchao Qiao, Hongwei Chu, Yizhou Liu
Abstract
In this paper, two-dimensional material Sb 2 Te 3 nanosheets are fabricated and the optical nonlinear response is investigated. A laser diode (LD) end-pumped doubly Q-switched Tm:YAP laser with electro-optic modulator (EOM) and Sb 2 Te 3 nanosheets based saturable absorber (SA) is presented. The shortest pulse duration of 38 ns is achieved at the pulse repetition frequency of 100 Hz, corresponding to the highest peak power of 111.8 kW. The double Q-switching technique shows the advantages of pulse duration compression and peak power improvement. The coupled rate equations for the doubly Q-switched laser are developed and the corresponding numerical simulation agrees with the experimental results. We believe that the Sb 2 Te 3 is a potential nanomaterial for the application in optoelectronic field.