High peak power, 28 ns Q-switched Tm:LuAG laser at a 2 μm wavelength by dual-loss-modulation. (11th January 2016)

• Record Type: Journal Article
• Authors: Luan, Chao; Yang, Kejian; Zhao, Jia; Zhao, Shengzhi; Qiao, Wenchao; Li, Tao; Liu, Cheng; Chu, Hongwei; Qiao, Junpeng; Zheng, Lihe; Xu, Xiaodong; Xu, Jun
• Is Part Of: Laser physics letters. Volume 13:Number 2(2016:Feb.)
• Publication Date: 2016-01-11
• Subjects: dual-loss-modulation -- high peak power -- 2 μm laser; Lasers -- Periodicals; Physics -- Periodicals; 621.366
• DOI: 10.1088/1612-2011/13/2/025006
• Languages: English
• ISSNs: 1612-2011

Abstract

Abstract: By employing output couplers (OCs) with different transmissions T and GaAs saturable absorbers (SAs) with different modulation depth Δ R in a passively Q -switched Tm:LuAG laser at 2 μ m, the optimal parameters of OCs and SAs for obtaining short pulse width and high peak power were investigated. By inserting an electro-optical modulator (EOM) into the optimized passively Q -switched Tm:LuAG laser ( T = 2%/Δ R = 19%), a dual-loss-modulated Q -switched Tm:LuAG laser with an EOM and GaAs was realized. The experimental results show that the dual-loss-modulated Q -switched laser can generate a shorter pulse width and higher peak power than the single-loss-modulated case. At an incident pump power of 8.4 W, the shortest pulse width achieved was 28 ns and the highest peak power reached 74 kW.