Amplification of a radially polarised beam in an Yb:YAG thin-slab
Amplification of a radially polarised beam in an Yb:YAG thin-slab
The use of an Yb:YAG thin-slab architecture for amplification of a radially-polarised beam at 1030 nm is investigated and shown to be a promising route for power scaling. The detrimental impact of the Gouy phase shift on radial polarisation purity is considered and a simple scheme for effective phase shift management to restore polarisation purity is presented. Preliminary experiments based on a double-pass amplifier configuration yielded an output beam with a high radial polarisation extinction ratio of 15dB and no degradation in polarisation purity despite the non- axial symmetry of amplifier gain medium. At 50W of launched pump power a small-signal gain of 7.5dB was obtained for a 25mW input, whilst 4.4dB gain was obtained for a 1.45W input. The prospects for further power scaling are discussed.
Smith, C.R.
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Beecher, S.J.
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Mackenzie, J.I.
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Clarkson, W.A.
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5 August 2017
Smith, C.R.
3fc58a4e-ecd6-455e-840b-275efa52fba1
Beecher, S.J.
b3664adc-d6b5-4a5a-a09a-8e1415c6d3f5
Mackenzie, J.I.
1d82c826-fdbf-425b-ac04-be43ccf12008
Clarkson, W.A.
3b060f63-a303-4fa5-ad50-95f166df1ba2
Smith, C.R., Beecher, S.J., Mackenzie, J.I. and Clarkson, W.A.
(2017)
Amplification of a radially polarised beam in an Yb:YAG thin-slab.
Applied Physics B, 123 (225).
(doi:10.1007/s00340-017-6802-z).
Abstract
The use of an Yb:YAG thin-slab architecture for amplification of a radially-polarised beam at 1030 nm is investigated and shown to be a promising route for power scaling. The detrimental impact of the Gouy phase shift on radial polarisation purity is considered and a simple scheme for effective phase shift management to restore polarisation purity is presented. Preliminary experiments based on a double-pass amplifier configuration yielded an output beam with a high radial polarisation extinction ratio of 15dB and no degradation in polarisation purity despite the non- axial symmetry of amplifier gain medium. At 50W of launched pump power a small-signal gain of 7.5dB was obtained for a 25mW input, whilst 4.4dB gain was obtained for a 1.45W input. The prospects for further power scaling are discussed.
Text
Amplification of a radially polarised beam in an YbYAG thin-slab
- Accepted Manuscript
Text
s00340-017-6802-z
- Version of Record
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Submitted date: 17 July 2017
Accepted/In Press date: 25 July 2017
e-pub ahead of print date: 5 August 2017
Published date: 5 August 2017
Identifiers
Local EPrints ID: 412616
URI: http://eprints.soton.ac.uk/id/eprint/412616
ISSN: 0946-2171
PURE UUID: 54ab21a5-6a53-49e8-a307-2703ae1a4249
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Date deposited: 24 Jul 2017 16:32
Last modified: 16 Mar 2024 05:36
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Author:
C.R. Smith
Author:
S.J. Beecher
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