2 and 3 µm passively Q-switched bulk pulse laser based on a MoS2/graphene heterojunction. (13th December 2017)

• Record Type: Journal Article
• Authors: Wang, Xihu; Xu, Jinlong; Sun, Yijian; Feng, Wendou; You, Zhenyu; Sun, Dunlu; Tu, Chaoyang
• Is Part Of: Laser physics letters. Volume 15:Number 1(2018:Jan.)
• Publication Date: 2017-12-13
• Subjects: nanocomposites -- mid-infrared -- Q-switched -- bulk laser; Lasers -- Periodicals; Physics -- Periodicals; 621.366
• DOI: 10.1088/1612-202X/aa9158
• Languages: English
• ISSNs: 1612-2011

Abstract

Abstract: We report for the first time that a MoS2 /graphene heterojunction can behave as a saturable absorber to realize 2 and 3 µ m passively Q -switched bulk lasers. This heterojunction is prepared through a facile hydrothermal method. For the 2 µ m laser, a stable pulse is obtained with a pulse duration of 473 ns, output power of 553 mW, pulse energy of 5.267 µ J and repetition rate of 105 kHz. For the 3 µ m laser, a pulse duration of 355 ns is observed with an average output power of 112 mW and pulse energy of 0.889 µ J. These results indicate the great potential of MoS2 /graphene heterojunctions for realizing mid-infrared pulse lasers.