Open AccessTunable twisted-mode Ho:YAG laser at continuous-wave and pulsed operation
Author(s) -
Tongyu Dai,
Yunpeng Wang,
Shuangxing Guo,
Youlun Ju,
Xiaoming Duan,
Baoquan Yao
Publication year - 2020
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.405153
Subject(s) - optics , materials science , laser , longitudinal mode , continuous wave , fabry–pérot interferometer , wavelength , laser beam quality , pulse width modulation , pulse duration , pulse repetition frequency , q switching , single mode optical fiber , injection seeder , pulse (music) , optoelectronics , laser power scaling , power (physics) , laser beams , physics , telecommunications , radar , quantum mechanics , detector , computer science
A single-longitudinal-mode Ho:YAG laser with a twisted-mode cavity under the continuous-wave and pulsed operation was demonstrated. The maximum continuous-wave single-longitudinal-mode output power of 0.76 W was obtained at the wavelength of 2097.46 nm, corresponding to a slope efficiency of 28.9%. The output wavelength was tuned from 2096.94 nm to 2098.48 nm by utilizing a 0.5-mm-thick etalon. Furthermore, the single-frequency pulsed operation of the twisted-mode Ho:YAG laser was realized by the electro-optic switch. For the 2 kHz pulse repetition frequency, the single-frequency pulse energy reached 0.2 mJ with the pulse width of 116.5 ns. The beam quality factors M 2 of the pulsed twisted-mode Ho:YAG laser in the x and y directions were 1.15 and 1.10, respectively.