Open AccessHigh-power actively Q-switched Ho-doped gadolinium tantalate laser
Author(s) -
Xiaoming Duan,
Jing Wu,
Renqin Dou,
Qingli Zhang,
Dai Taguchi,
Xiaotao Yang
Publication year - 2021
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.420706
Subject(s) - thulium , holmium , materials science , tantalate , optics , gadolinium , slope efficiency , laser , fiber laser , lithium tantalate , q switching , pulse duration , pulse repetition frequency , pulse (music) , doping , optoelectronics , physics , lithium niobate , ferroelectricity , telecommunications , detector , dielectric , radar , computer science , metallurgy
In this paper, we present the acousto-optical (AO) Q-switched performance of a holmium (Ho):gadolinium tantalate (GdTaO 4 ) (Ho:GTO) laser pumped by a thulium (Tm)-fiber laser emitting at 1.94 µm. In the efficient continuous wave (CW) regime, a maximum output power of 30.5 W at 2068.8 nm was achieved, corresponding to a slope efficiency of 74.9% with respect to the absorbed pump power. In the Q-switching regime, pulse energies of 2.4 mJ, 1.2 mJ, and 0.9 mJ were obtained with pulse repetition frequencies of 10 kHz, 20 kHz, and 30 kHz, respectively. The minimum pulse widths were 18 ns, 23 ns, and 26 ns, corresponding to peak powers of approximately 133.3 kW, 52.2 kW, and 34.6 kW, respectively.