Open AccessActive Q-switching operation of slab Ho:SYSO laser wing-pumped by fiber coupled laser diodes
Author(s) -
Xiaoming Duan,
Yingjie Shen,
Jing Gao,
Heyuan Zhu,
Chuanpeng Qian,
Liangbi Su,
Lihe Zheng,
Linjun Li,
Baoquan Yao,
Dai Taguchi
Publication year - 2019
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.27.011455
Subject(s) - optics , materials science , laser , q switching , diode , slab , pulse width modulation , fiber laser , slope efficiency , laser pumping , pulse (music) , power (physics) , optoelectronics , physics , quantum mechanics , geophysics , detector
In this paper, we demonstrate the continuous-wave and acousto-optical Q-switched performance of diode-pumped slab Ho:(Sc 0.5 Y 0.5 ) 2 SiO 5 (Ho:SYSO) laser at 2.1 µm for the first time. Two 1.91-µm laser diodes were used to pump the Ho:SYSO crystal. With a wing-pumping structure, at absorbed pump power of 44.7 W, the continuous wave slab Ho:SYSO laser produced 20.7 W maximum output power at 2097.9 nm, resulting in a slope efficiency of 53.1% with respect to the absorbed pump power. In the Q-switched regime, the slab Ho:SYSO laser produced up to 3.4 mJ pulse energy with 20 ns minimum pulse width at pulse repetition frequency of 5 kHz, corresponding to a peak power of 170 kW.