Energy transfer upconversion measurements for popular neodymium-doped crystals
Energy transfer upconversion measurements for popular neodymium-doped crystals
We report our investigations on measuring the energy transfer upconversion (ETU) parameter in various neodymium-doped laser crystals (YAG, YVO4, GdVO4, KGW, and YLF) via the z-scan technique. Starting with a simple two-level macro-parameter spatially dependent rate equation model we obtain a good correlation for Nd:YAG at different concentrations and crystal temperatures, however the other crystals illustrate significant deviation between simulation and measurement. Currently we attribute this difference to additional ion-ion interactions in the respective samples, for which a more detailed model is currently being considered. Of the tested materials Nd:YAG appears to have the lowest ETU macro parameter, at around 0.35 x 10-16 cm3/s for a 0.6 at.% doping concentration, compared with nominally thrice this for 0.5 at% Nd:YLF and almost an order of magnitude higher for the 0.5 at.% vanadates (YVO4 and GdVO4). These values are significant for determining additional heat load in the respective gain media, especially when trying to increase the output power/energy from lasers employing these crystals, typically achieved by increasing the pump and cavity mode size.
Yoon, S.J.
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Yan, R.P.
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Beecher, S.J.
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Mackenzie, J.I.
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26 March 2015
Yoon, S.J.
fcca92bf-3283-4ba8-85d5-767ca419aa9f
Yan, R.P.
5337a6fa-afac-4693-8d92-a6b79276b8dd
Beecher, S.J.
b3664adc-d6b5-4a5a-a09a-8e1415c6d3f5
Mackenzie, J.I.
1d82c826-fdbf-425b-ac04-be43ccf12008
Yoon, S.J., Yan, R.P., Beecher, S.J. and Mackenzie, J.I.
(2015)
Energy transfer upconversion measurements for popular neodymium-doped crystals.
In Solid State Lasers XXIV: Technology and Devices.
SPIE.
10 pp
.
(doi:10.1117/12.2082707).
Record type:
Conference or Workshop Item
(Paper)
Abstract
We report our investigations on measuring the energy transfer upconversion (ETU) parameter in various neodymium-doped laser crystals (YAG, YVO4, GdVO4, KGW, and YLF) via the z-scan technique. Starting with a simple two-level macro-parameter spatially dependent rate equation model we obtain a good correlation for Nd:YAG at different concentrations and crystal temperatures, however the other crystals illustrate significant deviation between simulation and measurement. Currently we attribute this difference to additional ion-ion interactions in the respective samples, for which a more detailed model is currently being considered. Of the tested materials Nd:YAG appears to have the lowest ETU macro parameter, at around 0.35 x 10-16 cm3/s for a 0.6 at.% doping concentration, compared with nominally thrice this for 0.5 at% Nd:YLF and almost an order of magnitude higher for the 0.5 at.% vanadates (YVO4 and GdVO4). These values are significant for determining additional heat load in the respective gain media, especially when trying to increase the output power/energy from lasers employing these crystals, typically achieved by increasing the pump and cavity mode size.
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Published date: 26 March 2015
Venue - Dates:
SPIE Photonics West '15, , San Francisco, United States, 2015-02-07 - 2015-02-12
Organisations:
Optoelectronics Research Centre
Identifiers
Local EPrints ID: 375075
URI: http://eprints.soton.ac.uk/id/eprint/375075
PURE UUID: 71cfaac5-21ed-475c-b3ce-586b00ccbb1e
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Date deposited: 11 Mar 2015 12:48
Last modified: 17 Mar 2024 02:51
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Author:
S.J. Yoon
Author:
R.P. Yan
Author:
S.J. Beecher
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