High-power passively Q-switched 2 μm all-solid-state laser based on a Bi_2Te_3 saturable absorber

作     者：X.LIU K.YANG S.ZHAO T.LI W.QIAO H.ZHANG B.ZHANG J.HE J.BIAN L.ZHENG L.SU J.XU 

作者机构：School of Information Science and Engineering and Shandong Provincial Key Laboratory of Laser Technology and ApplicationShandong University State Key Laboratory of Crystal Material Shandong University State Key Laboratory of Pulsed Power Laser Technology Key Laboratory of Transparent and Opto-functional Inorganic Materials Artificial Crystal Research Center Shanghai Institute of CeramicsChinese Academy of Sciences School of Physics Science and Engineering Institute for Advanced Study Tongji University 

出 版 物：《Photonics Research》 (光子学研究（英文版）)

年 卷 期：2017年第5卷第5期

页      面：461-466页

核心收录：

学科分类：080901[工学-物理电子学] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 080401[工学-精密仪器及机械] 0804[工学-仪器科学与技术] 0803[工学-光学工程] 

基　　金：National Natural Science Foundation of China(NSFC)(61475088,61775119,61378022,61422511) Young Scholars Program of Shandong University(2015WLJH38) Open Research Fund of the State Key Laboratory of Pulsed Power Laser Technology,Electronic Engineering Institute,Hefei,China(SLK2016KF01) 

主　　题：Te SA m all-solid-state laser based on a Bi2Te3 saturable absorber High-power passively Q-switched 2 Bi 

摘      要：By using the ultrasound-assisted liquid phase exfoliation method, Bi_2Te_3 nanosheets are synthesized and deposited onto a quartz plate to form a kind of saturable absorber(SA), in which nonlinear absorption properties around 2 μm are analyzed with a home-made mode-locked laser. With the as-prepared Bi_2Te_3 SA employed,a stable passively Q-switched all-solid-state 2 μm laser is successfully realized. Q-switched pulses with a maximum average output power of 2.03 W are generated under an output coupling of 5%, corresponding to the maximum single-pulse energy of 18.4 μJ and peak power of 23 W. The delivered shortest pulse duration and maximum repetition rate are 620 ns and 118 k Hz under an output coupling of 2%, respectively. It is the first presentation of such Bi_2Te_3 SA employed in a solid-state Q-switched crystalline laser at 2 μm, to the best of our knowledge. In comparison with other 2 D materials suitable for pulsed 2 μm lasers, the saturable absorption performance of Bi_2Te_3 SA is proved to be promising in generating high power and high-repetition-rate 2 μm laser pulses.