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Actively Q-switched radially polarized Ho:YAG laser with an intra-cavity laser-written S-waveplate

Actively Q-switched radially polarized Ho:YAG laser with an intra-cavity laser-written S-waveplate
Actively Q-switched radially polarized Ho:YAG laser with an intra-cavity laser-written S-waveplate
Nanosecond Q-switched pulses and radial polarization are established standalone techniques for enhanced laser materials processing applications, but are generally challenging to achieve simultaneously at high average power levels. Here, we demonstrate a 20.6 W radially polarized Ho:YAG rod laser which has been actively Q-switched in order to generate 515 μJ , 210 ns pulses at 2097 nm. By utilizing an ultra-low-loss spatially-variant birefringent waveplate (S-waveplate) inside the laser cavity, the linearly polarized fundamental mode has been converted to a radially polarized donut-shaped beam with very high conversion efficiency.
0146-9592
4508-4511
Barber, Matthew James
5682d70c-71a4-4875-a714-55704b8ac20c
Shardlow, Peter
9ca17301-8ae7-4307-8bb9-371df461520c
Lei, Yuhao
347ba758-df03-47b6-baed-3a58285173f7
Kazansky, Peter G.
a5d123ec-8ea8-408c-8963-4a6d921fd76c
Clarkson, W.A.
3b060f63-a303-4fa5-ad50-95f166df1ba2
Barber, Matthew James
5682d70c-71a4-4875-a714-55704b8ac20c
Shardlow, Peter
9ca17301-8ae7-4307-8bb9-371df461520c
Lei, Yuhao
347ba758-df03-47b6-baed-3a58285173f7
Kazansky, Peter G.
a5d123ec-8ea8-408c-8963-4a6d921fd76c
Clarkson, W.A.
3b060f63-a303-4fa5-ad50-95f166df1ba2

Barber, Matthew James, Shardlow, Peter, Lei, Yuhao, Kazansky, Peter G. and Clarkson, W.A. (2022) Actively Q-switched radially polarized Ho:YAG laser with an intra-cavity laser-written S-waveplate. Optics Letters, 47 (17), 4508-4511. (doi:10.1364/OL.467960).

Record type: Article

Abstract

Nanosecond Q-switched pulses and radial polarization are established standalone techniques for enhanced laser materials processing applications, but are generally challenging to achieve simultaneously at high average power levels. Here, we demonstrate a 20.6 W radially polarized Ho:YAG rod laser which has been actively Q-switched in order to generate 515 μJ , 210 ns pulses at 2097 nm. By utilizing an ultra-low-loss spatially-variant birefringent waveplate (S-waveplate) inside the laser cavity, the linearly polarized fundamental mode has been converted to a radially polarized donut-shaped beam with very high conversion efficiency.

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Published date: 29 August 2022

Identifiers

Local EPrints ID: 469343
URI: http://eprints.soton.ac.uk/id/eprint/469343
ISSN: 0146-9592
PURE UUID: c820ea16-2ad9-466e-8bbc-89d0039d785c
ORCID for Matthew James Barber: ORCID iD orcid.org/0000-0001-9768-6421
ORCID for Peter Shardlow: ORCID iD orcid.org/0000-0003-0459-0581

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Date deposited: 13 Sep 2022 16:49
Last modified: 28 Oct 2022 02:06

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