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Amplification of a radially polarised beam in an Yb:YAG thin-slab

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.
0946-2171
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.
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).

Record type: Article

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.

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Amplification of a radially polarised beam in an YbYAG thin-slab - Accepted Manuscript
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More information

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: https://eprints.soton.ac.uk/id/eprint/412616
ISSN: 0946-2171
PURE UUID: 54ab21a5-6a53-49e8-a307-2703ae1a4249
ORCID for J.I. Mackenzie: ORCID iD orcid.org/0000-0002-3355-6051

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Date deposited: 24 Jul 2017 16:32
Last modified: 05 Nov 2019 05:52

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