Energy transfer upconversion in Nd:YAG at cryogenic-temperatures
Energy transfer upconversion in Nd:YAG at cryogenic-temperatures
The precise characterisation of the ground state absorption cross section around 800nm of Nd:YAG from Room Temperature to Liquid Nitrogen Temperature is presented. These results enabled the measurement of the Energy Transfer Upconversion macroparameter over the same temperature range for 0.3at.% - and 0.6at.%-doped samples via a simple and automated z-scan technique. The main absorption cross section peak at 808nm is found to increase from (6.90±0.30)pm2 at the highest to (42.30±2.10) pm2 at the lowest temperatures, respectively. Over the same range, the ETU parameter increases from (21.5±2.3)10−18cm3/s to (52.6±2.5)10−18cm3/s and from (36.0±2.8)10−18cm3 to (65.7±1.9)10−18cm/s, for 0.3at.% and 0.6at.%, respectively. Although a limiting factor in the RT operation at 946nm of Nd:YAG, we calculate that despite the twofold increase in the ETU parameter, with the crystal cooled to LNT its effect on laser threshold is negligible.
2019-2029
Cante, Silvia
153acbb4-d6d1-4f3e-ada7-1be8b5b94c8f
Mackenzie, Jacob
1d82c826-fdbf-425b-ac04-be43ccf12008
3 August 2020
Cante, Silvia
153acbb4-d6d1-4f3e-ada7-1be8b5b94c8f
Mackenzie, Jacob
1d82c826-fdbf-425b-ac04-be43ccf12008
Cante, Silvia and Mackenzie, Jacob
(2020)
Energy transfer upconversion in Nd:YAG at cryogenic-temperatures.
Optical Materials Express, 10 (9), .
(doi:10.1364/OME.397034).
Abstract
The precise characterisation of the ground state absorption cross section around 800nm of Nd:YAG from Room Temperature to Liquid Nitrogen Temperature is presented. These results enabled the measurement of the Energy Transfer Upconversion macroparameter over the same temperature range for 0.3at.% - and 0.6at.%-doped samples via a simple and automated z-scan technique. The main absorption cross section peak at 808nm is found to increase from (6.90±0.30)pm2 at the highest to (42.30±2.10) pm2 at the lowest temperatures, respectively. Over the same range, the ETU parameter increases from (21.5±2.3)10−18cm3/s to (52.6±2.5)10−18cm3/s and from (36.0±2.8)10−18cm3 to (65.7±1.9)10−18cm/s, for 0.3at.% and 0.6at.%, respectively. Although a limiting factor in the RT operation at 946nm of Nd:YAG, we calculate that despite the twofold increase in the ETU parameter, with the crystal cooled to LNT its effect on laser threshold is negligible.
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In preparation date: 31 March 2020
Submitted date: 30 June 2020
Published date: 3 August 2020
Identifiers
Local EPrints ID: 441899
URI: http://eprints.soton.ac.uk/id/eprint/441899
ISSN: 2159-3930
PURE UUID: 78c2fe43-0880-484d-921c-995780575fb9
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Date deposited: 01 Jul 2020 16:35
Last modified: 17 Mar 2024 02:51
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Author:
Silvia Cante
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