Continuous-wave and mode-locked operation of an in-band pumped Tm,Ho,Lu:CaGdAlO₄ laser
File(s)
Published version
Author(s)
Type
Journal Article
Abstract
We investigate in-band pumping of a Tm,Ho,Lu:CaGdAlO4 laser using a Raman-shifted Er-fiber laser (1678 nm), in the continuous-wave (CW) and mode-locked (ML) regimes. A maximum output power of 524 mW is obtained in the CW regime with a 5% output coupler at an absorbed pump power of 2.04 W, corresponding to a slope efficiency of 27.9%. A maximum CW wavelength tuning range of 160 nm at the zero level, from 1984 to 2144 nm, is obtained with a 0.2% output coupler. In the ML regime, pumping with 5.5 W (unpolarized), the average output power (0.2% output coupler) reaches 148 mW at a repetition rate of ~96 MHz. The output spectrum is centered at 2071.5 nm with a FWHM of 21.5 nm (σ-polarization). The pulse duration amounts to 218 fs (time-bandwidth product equal to 0.327).
Date Issued
2023-12-01
Date Acceptance
2023-12-01
Citation
Applied Sciences, 2023, 13 (23)
ISSN
2076-3417
Publisher
MDPI AG
Journal / Book Title
Applied Sciences
Volume
13
Issue
23
Copyright Statement
© 2023 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
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Subjects
CaGdAlO4
CAYALO4
Chemistry
Chemistry, Multidisciplinary
co-doped crystal
CRYSTAL
disordered crystal
Engineering
Engineering, Multidisciplinary
femtosecond pulses
HO
Ho laser
in-band pumping
inhomogeneous broadening
Materials Science
Materials Science, Multidisciplinary
mixed crystal
mode-locking
Physical Sciences
Physics
Physics, Applied
Science & Technology
Technology
THIN-DISK LASER
TM
YBCAGDALO4 LASER
Publication Status
Published
Article Number
12927
Date Publish Online
2023-12-03