Open AccessWavelength-locked continuous-wave and Q-switched Ho:CaF2 laser at 21005 nm
Author(s) -
Xiaoming Duan,
Linjun Li,
Xinsheng Guo,
Yu Ding,
Baoquan Yao,
Lihe Zheng,
Liangbi Su,
Yuezhu Wang
Publication year - 2018
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.26.026916
Subject(s) - laser linewidth , optics , full width at half maximum , materials science , laser , wavelength , q switching , slope efficiency , continuous wave , pulse width modulation , pulse (music) , pulse repetition frequency , fiber laser , physics , power (physics) , telecommunications , quantum mechanics , detector , radar , computer science
In this paper, we demonstrated a linewidth-narrowed continuous-wave (CW) and acousto-optical Q-switched Ho:CaF 2 laser for the first time. With a volume Bragg grating, a maximum CW output power of 6.94 W at 2100.5 nm, and slope efficiency of 57.9%, an FWHM linewidth of 0.31 nm was obtained. When absorbed pump power was 13.2 W, the maximum average output powers of 6.08 W, 5.9 W, and 5.71 W were achieved in a Q-switched Ho:CaF 2 laser under pulse repetition frequencies of 10 kHz, 5 kHz, and 3 kHz, corresponding to the slope efficiencies of 51.2%, 49.6%, and 48.5%, respectively. The minimum pulse width of 54 ns was achieved at pulse repetition frequency of 3 kHz.