> 30 W vortex LG₀₁ or HG₁₀ laser using a modetransforming output coupler
File(s)
Published version
Author(s)
Geberbauer, Jan
Kerridge-Johns, William
Damzen, Michael
Type
Journal Article
Abstract
High-power vortex light generated directly from lasers will help drive their
applications in material processing, optical manipulation, levitation, particle acceleration, and
communications, but limited power has been achieved to date. In this work, we demonstrate
record vortex average power of 31.3 W directly from a laser, to the best of our knowledge,
using an interferometric mode transforming output coupler to convert a fundamental mode
Nd:YVO4 laser into a LG01 vortex output. The vortex laser was Q-switched with up to 600 kHz
pulse rate with a high slope efficiency of 62.5% and an excellent LG01 modal purity of 95.2%.
We further demonstrate > 30W laser power in a high quality HG10 mode by simple adjustment
of the output coupler. Experimental investigations of varying output coupling transmission are
compared with theory. This successful implementation of the interferometric output coupler in
a high power system demonstrates the suitability of the mode transforming method for robust
turn-key vortex lasers with high efficiency and high modal purity, with scalable power and
pulse rate.
applications in material processing, optical manipulation, levitation, particle acceleration, and
communications, but limited power has been achieved to date. In this work, we demonstrate
record vortex average power of 31.3 W directly from a laser, to the best of our knowledge,
using an interferometric mode transforming output coupler to convert a fundamental mode
Nd:YVO4 laser into a LG01 vortex output. The vortex laser was Q-switched with up to 600 kHz
pulse rate with a high slope efficiency of 62.5% and an excellent LG01 modal purity of 95.2%.
We further demonstrate > 30W laser power in a high quality HG10 mode by simple adjustment
of the output coupler. Experimental investigations of varying output coupling transmission are
compared with theory. This successful implementation of the interferometric output coupler in
a high power system demonstrates the suitability of the mode transforming method for robust
turn-key vortex lasers with high efficiency and high modal purity, with scalable power and
pulse rate.
Date Issued
2021-08-25
Date Acceptance
2021-08-08
Citation
Optics Express, 2021, 29 (18), pp.29082-29094
ISSN
1094-4087
Publisher
Optical Society of America (OSA)
Start Page
29082
End Page
29094
Journal / Book Title
Optics Express
Volume
29
Issue
18
Copyright Statement
© 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement. Published by The Optical Society under the terms of the Creative Commons Attribution 4.0
License. Further distribution of this work must maintain attribution to the author(s) and the
published article's title, journal citation, and DOI.
License. Further distribution of this work must maintain attribution to the author(s) and the
published article's title, journal citation, and DOI.
License URL
Sponsor
Engineering & Physical Science Research Council (E
Identifier
https://www.osapublishing.org/oe/abstract.cfm?doi=10.1364/OE.432674
Grant Number
EP/R511547/1
Subjects
0205 Optical Physics
0906 Electrical and Electronic Engineering
1005 Communications Technologies
Optics
Publication Status
Published
Date Publish Online
2021-08-25