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High-power master-oscillator power-amplifier with optical vortex output

High-power master-oscillator power-amplifier with optical vortex output
High-power master-oscillator power-amplifier with optical vortex output
A high-power master-oscillator power-amplifier with optical vortex output is reported. The master oscillator for an optical vortex seed beam is a simple two-mirror Nd:YAG laser using a fiber-based pump beam conditioning scheme. The seed is amplified in a double-clad multimode fiber amplifier end-pumped by a high-power diode laser at 975nm yielding 10.7W of continuous-wave output at 1064nm in the first-order Laguerre–Gaussian beam with M2 ~ 2.11 for an absorbed pump power of 17.5W, corresponding to a slope efficiency of ~59 %. The ring-shaped intensity profile and the wave front handedness of the seed beam were well preserved in the fiber amplifier. The prospects of power scaling via this approach are discussed.
0946-2171
459-464
Kim, D.J.
0fd9f257-64e8-47c1-9b69-5ef5dd10db8d
Kim, J.W.
43f1b0c3-5a59-4449-a56a-386668bd061a
Clarkson, W.A.
3b060f63-a303-4fa5-ad50-95f166df1ba2
Kim, D.J.
0fd9f257-64e8-47c1-9b69-5ef5dd10db8d
Kim, J.W.
43f1b0c3-5a59-4449-a56a-386668bd061a
Clarkson, W.A.
3b060f63-a303-4fa5-ad50-95f166df1ba2

Kim, D.J., Kim, J.W. and Clarkson, W.A. (2014) High-power master-oscillator power-amplifier with optical vortex output. Applied Physics B, 117 (1), 459-464. (doi:10.1007/s00340-014-5855-5).

Record type: Article

Abstract

A high-power master-oscillator power-amplifier with optical vortex output is reported. The master oscillator for an optical vortex seed beam is a simple two-mirror Nd:YAG laser using a fiber-based pump beam conditioning scheme. The seed is amplified in a double-clad multimode fiber amplifier end-pumped by a high-power diode laser at 975nm yielding 10.7W of continuous-wave output at 1064nm in the first-order Laguerre–Gaussian beam with M2 ~ 2.11 for an absorbed pump power of 17.5W, corresponding to a slope efficiency of ~59 %. The ring-shaped intensity profile and the wave front handedness of the seed beam were well preserved in the fiber amplifier. The prospects of power scaling via this approach are discussed.

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More information

e-pub ahead of print date: 9 May 2014
Published date: October 2014
Organisations: Optoelectronics Research Centre

Identifiers

Local EPrints ID: 372642
URI: https://eprints.soton.ac.uk/id/eprint/372642
ISSN: 0946-2171
PURE UUID: c7d0cf90-4c29-4b85-83cc-d1a474d13b66

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Date deposited: 17 Dec 2014 10:15
Last modified: 29 Nov 2018 17:32

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Contributors

Author: D.J. Kim
Author: J.W. Kim
Author: W.A. Clarkson

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