Radially polarized 33 W emission from a double-pass Ho:YAG thin-slab amplifier
Radially polarized 33 W emission from a double-pass Ho:YAG thin-slab amplifier
The generation of a 33.7 W radially polarized output is demonstrated by way of double-pass amplification in a Ho:YAG thin-slab crystal. The amplifier system was seeded with the radially polarized output beam from a continuous-wave 13.2W, 2.1 μm Ho:YAG rod laser, which exploited gain medium bifocusing and a ring-shaped pump spot to promote preferential lasing on the radially polarized Laguerre-Gaussian mode. By compensating for both the thermally induced stress birefringence in the thin-slab crystal and the Gouy phase shift resulting from astigmatic focusing of the 13.2 W seed, only marginal beam degradation was observed across the 95 W range of pumppower into the amplifier.
2395-2399
Barber, Matthew James
5682d70c-71a4-4875-a714-55704b8ac20c
Shardlow, Peter
9ca17301-8ae7-4307-8bb9-371df461520c
Smith, Callum Robertson
3fc58a4e-ecd6-455e-840b-275efa52fba1
Clarkson, W.A.
3b060f63-a303-4fa5-ad50-95f166df1ba2
1 September 2022
Barber, Matthew James
5682d70c-71a4-4875-a714-55704b8ac20c
Shardlow, Peter
9ca17301-8ae7-4307-8bb9-371df461520c
Smith, Callum Robertson
3fc58a4e-ecd6-455e-840b-275efa52fba1
Clarkson, W.A.
3b060f63-a303-4fa5-ad50-95f166df1ba2
Barber, Matthew James, Shardlow, Peter, Smith, Callum Robertson and Clarkson, W.A.
(2022)
Radially polarized 33 W emission from a double-pass Ho:YAG thin-slab amplifier.
Journal of the Optical Society of America B, 39 (9), .
(doi:10.1364/JOSAB.465778).
Abstract
The generation of a 33.7 W radially polarized output is demonstrated by way of double-pass amplification in a Ho:YAG thin-slab crystal. The amplifier system was seeded with the radially polarized output beam from a continuous-wave 13.2W, 2.1 μm Ho:YAG rod laser, which exploited gain medium bifocusing and a ring-shaped pump spot to promote preferential lasing on the radially polarized Laguerre-Gaussian mode. By compensating for both the thermally induced stress birefringence in the thin-slab crystal and the Gouy phase shift resulting from astigmatic focusing of the 13.2 W seed, only marginal beam degradation was observed across the 95 W range of pumppower into the amplifier.
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josab-39-9-2395
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More information
Accepted/In Press date: 11 August 2022
Published date: 1 September 2022
Additional Information:
Funding Information:
Engineering and Physical Sciences Research Council (EP/P027644/1).
Funding Information:
Acknowledgment. M. J. B. acknowledges financial support from the EPSRC (2115206) and Leonardo UK.
Publisher Copyright:
© 2022 Optica Publishing Group.
Identifiers
Local EPrints ID: 468911
URI: http://eprints.soton.ac.uk/id/eprint/468911
ISSN: 0740-3224
PURE UUID: 14c0271b-49bb-4639-8969-b50d6486b355
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Date deposited: 01 Sep 2022 16:39
Last modified: 17 Mar 2024 03:27
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Author:
Matthew James Barber
Author:
Callum Robertson Smith
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