Simulation of solid-state lasers with temperature and wavelength dependent absorption and emission
Simulation of solid-state lasers with temperature and wavelength dependent absorption and emission
The absorption spectrum of a solid-state gain medium is temperature dependent. Typically, raytracing software will apply an average absorption coefficient and track the pump absorption. Therefore, the outcome is an approximation of the pump absorption profile that is independent of the temperature dependence of the absorption cross-section spectrum. An iterative algorithm of raytracing and Finite Element Analysis is demonstrated in the simulation of diode-pumped Nd:YAG and Yb:YAG lasers to calculate the local temperature and associated absorption cross-section. This allowed more accurate profiles for the pump absorption, population inversion, and temperature in the crystal to be determined. The influence on beam quality and output power for these lasers is presented.
Saha, Souryadeep
f55b60c2-9c22-46fd-b462-de69a8983228
Mackenzie, Jacob I.
1d82c826-fdbf-425b-ac04-be43ccf12008
Pflaum, Christof
a3f370a9-134d-46c5-934e-8512ec0c306b
April 2024
Saha, Souryadeep
f55b60c2-9c22-46fd-b462-de69a8983228
Mackenzie, Jacob I.
1d82c826-fdbf-425b-ac04-be43ccf12008
Pflaum, Christof
a3f370a9-134d-46c5-934e-8512ec0c306b
Saha, Souryadeep, Mackenzie, Jacob I. and Pflaum, Christof
(2024)
Simulation of solid-state lasers with temperature and wavelength dependent absorption and emission.
SPIE Optical Systems Design: Computational Optics 2024, Palais de la Musique et des Congrès, Strasbourg, France.
07 - 11 Apr 2024.
9 pp
.
(doi:10.1117/12.3016718).
Record type:
Conference or Workshop Item
(Paper)
Abstract
The absorption spectrum of a solid-state gain medium is temperature dependent. Typically, raytracing software will apply an average absorption coefficient and track the pump absorption. Therefore, the outcome is an approximation of the pump absorption profile that is independent of the temperature dependence of the absorption cross-section spectrum. An iterative algorithm of raytracing and Finite Element Analysis is demonstrated in the simulation of diode-pumped Nd:YAG and Yb:YAG lasers to calculate the local temperature and associated absorption cross-section. This allowed more accurate profiles for the pump absorption, population inversion, and temperature in the crystal to be determined. The influence on beam quality and output power for these lasers is presented.
Text
SPIE_Proceeding_Manuscript_Saha
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More information
In preparation date: 11 March 2024
Published date: April 2024
Venue - Dates:
SPIE Optical Systems Design: Computational Optics 2024, Palais de la Musique et des Congrès, Strasbourg, France, 2024-04-07 - 2024-04-11
Identifiers
Local EPrints ID: 490393
URI: http://eprints.soton.ac.uk/id/eprint/490393
PURE UUID: 96fcf3e6-82c3-45d3-b56c-240022470b59
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Date deposited: 24 May 2024 16:41
Last modified: 01 Aug 2024 04:01
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Contributors
Author:
Souryadeep Saha
Author:
Christof Pflaum
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