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Modelling of high-power continuous-wave Tm:YAG side-pumped double-clad waveguide lasers

Modelling of high-power continuous-wave Tm:YAG side-pumped double-clad waveguide lasers
Modelling of high-power continuous-wave Tm:YAG side-pumped double-clad waveguide lasers
A plane-wave model accounting for cross-relaxation, upconversion, ground-state depletion, and gain saturation in continuous-wave laser systems is applied to side-pumped Tm:YAG double-clad planar waveguides. The temperature profile due to high-power pumping, and the delivery and absorption efficiencies of proximity-coupled diode bars, are also calculated. The theoretical performance is found to be a good fit to the experimental results, which show 15 W output at 2 µm from 43 W of diode pump power. The output channels for the absorbed power are quantified, and it is shown that upconversion limits the gain and, hence, the size of the output coupling that can be used in such lasers. The same theory is then used to design a very compact waveguide laser capable of delivering 100 W of output power.
laser thermal factors, lasers, upconversion, waveguides
0018-9197
222-230
Mackenzie, J.I.
1d82c826-fdbf-425b-ac04-be43ccf12008
Li, Cheng
b18a76fb-45ed-4894-9ace-c4897be16c18
Shepherd, D.P.
9fdd51c4-39d6-41b3-9021-4c033c2f4ead
Beach, R.J.
2f66046b-92c5-472c-ac8d-660bdfddc0e7
Mitchell, S.C.
5b900f44-98e4-41e3-98c3-81b75dc68dfe
Mackenzie, J.I.
1d82c826-fdbf-425b-ac04-be43ccf12008
Li, Cheng
b18a76fb-45ed-4894-9ace-c4897be16c18
Shepherd, D.P.
9fdd51c4-39d6-41b3-9021-4c033c2f4ead
Beach, R.J.
2f66046b-92c5-472c-ac8d-660bdfddc0e7
Mitchell, S.C.
5b900f44-98e4-41e3-98c3-81b75dc68dfe

Mackenzie, J.I., Li, Cheng, Shepherd, D.P., Beach, R.J. and Mitchell, S.C. (2002) Modelling of high-power continuous-wave Tm:YAG side-pumped double-clad waveguide lasers. IEEE Journal of Quantum Electronics, 38 (2), 222-230. (doi:10.1109/3.980276).

Record type: Article

Abstract

A plane-wave model accounting for cross-relaxation, upconversion, ground-state depletion, and gain saturation in continuous-wave laser systems is applied to side-pumped Tm:YAG double-clad planar waveguides. The temperature profile due to high-power pumping, and the delivery and absorption efficiencies of proximity-coupled diode bars, are also calculated. The theoretical performance is found to be a good fit to the experimental results, which show 15 W output at 2 µm from 43 W of diode pump power. The output channels for the absorbed power are quantified, and it is shown that upconversion limits the gain and, hence, the size of the output coupling that can be used in such lasers. The same theory is then used to design a very compact waveguide laser capable of delivering 100 W of output power.

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Published date: 2002
Keywords: laser thermal factors, lasers, upconversion, waveguides

Identifiers

Local EPrints ID: 13805
URI: https://eprints.soton.ac.uk/id/eprint/13805
ISSN: 0018-9197
PURE UUID: 351adaeb-c422-4c2a-a375-ad74b9a22449
ORCID for J.I. Mackenzie: ORCID iD orcid.org/0000-0002-3355-6051
ORCID for D.P. Shepherd: ORCID iD orcid.org/0000-0002-4561-8184

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Date deposited: 22 Dec 2004
Last modified: 05 Nov 2019 02:07

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Contributors

Author: J.I. Mackenzie ORCID iD
Author: Cheng Li
Author: D.P. Shepherd ORCID iD
Author: R.J. Beach
Author: S.C. Mitchell

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