Open AccessEfficient high-power orthogonally-polarized dual-wavelength Nd:YLF laser at 1314 and 1321 nm
Author(s) -
Zhihua Tu,
Shi-Bo Dai,
Siqi Zhu,
Hao Yin,
Zhen Li,
Encai Ji,
Zhenqiang Chen
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.27.032949
Subject(s) - optics , materials science , laser , slope efficiency , wavelength , energy conversion efficiency , pulse repetition frequency , output coupler , pulse width modulation , power (physics) , optoelectronics , fiber laser , physics , telecommunications , radar , quantum mechanics , computer science
We demonstrate an 806 nm laser diode end-pumped continuous-wave (CW) and actively Q-switched (AQS) orthogonally-polarized dual-wavelength Nd:YLF laser operating at 1314 and 1321 nm. Benefitting from the small difference of the stimulated emission cross sections at 1314 and 1321 nm in Nd:YLF crystal, the power equalized emissions at both wavelengths were achieved by simply titling the output coupler. A maximum CW output power of 9.2 W was obtained with the incident pump power of 32.5 W, giving an optical-to-optical conversion efficiency of approximately 28% and a slope efficiency of approximately 33%. Furthermore, active Q-switching was realized by inserting a Brewster-cut acousto optic modulator. For an incident pump power of 30 W, this oscillator delivered an average power of 6.5 W at a pulse repetition frequency (PRF) of 20 kHz, and a pulse energy of 2.6 mJ with a peak power of approximately 72 kW at a PRF of 1 kHz.