Effects of cryogenic temperatures on the performance of CW VECSELs
Effects of cryogenic temperatures on the performance of CW VECSELs
We report the effects of cryogenic temperatures on the performance of two CW VECSELs. Firstly we make use of a liquid nitrogen cooled copper cold finger cryostat to house an entire VECSEL device within the vacuum space and report a 3.3 fold reduction in lasing threshold and a 3.6 times increase in the slope efficiency when the gain chip is held at 133 K compared to 293 K. Secondly we show that a VECSEL utilising an unprocessed gain chip and pumped with constant pump-spot size, exhibits thermal rollover at twice the incident pump power when held at 20 K and compared to operation at 293 K. This enhanced performance will motivate the development of processed gain chips that are robust against thermal contraction.
Morris, O.J.
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Wilcox, K.G.
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Head, C.R.
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Turnbull, A.P.
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Farrer, I.
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Beere, H.E.
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Ritchie, D.A.
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Tropper, A.C.
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18 February 2013
Morris, O.J.
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Wilcox, K.G.
b7c8da76-3530-4cbf-aaec-ffa11c347230
Head, C.R.
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Turnbull, A.P.
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Farrer, I.
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Beere, H.E.
21adf7b3-de6c-4b51-96ce-76c673e4dc31
Ritchie, D.A.
efa64786-3cb8-47f4-98d5-e8cce27bb1e7
Tropper, A.C.
f3505426-e0d5-4e91-aed3-aecdb44b393c
Morris, O.J., Wilcox, K.G., Head, C.R., Turnbull, A.P., Farrer, I., Beere, H.E., Ritchie, D.A. and Tropper, A.C.
(2013)
Effects of cryogenic temperatures on the performance of CW VECSELs.
Hastie, Jennifer E.
(ed.)
In Vertical External Cavity Surface Emitting Lasers (VECSELs) III.
vol. 8606,
SPIE..
(doi:10.1117/12.2002368).
Record type:
Conference or Workshop Item
(Paper)
Abstract
We report the effects of cryogenic temperatures on the performance of two CW VECSELs. Firstly we make use of a liquid nitrogen cooled copper cold finger cryostat to house an entire VECSEL device within the vacuum space and report a 3.3 fold reduction in lasing threshold and a 3.6 times increase in the slope efficiency when the gain chip is held at 133 K compared to 293 K. Secondly we show that a VECSEL utilising an unprocessed gain chip and pumped with constant pump-spot size, exhibits thermal rollover at twice the incident pump power when held at 20 K and compared to operation at 293 K. This enhanced performance will motivate the development of processed gain chips that are robust against thermal contraction.
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Published date: 18 February 2013
Venue - Dates:
Conference on Vertical External Cavity Surface Emitting Lasers (VECSELs) III, , San Francisco, United States, 2013-02-03 - 2013-02-05
Identifiers
Local EPrints ID: 443643
URI: http://eprints.soton.ac.uk/id/eprint/443643
PURE UUID: 07a50a0d-c3a7-472b-bfb7-36a96fc934eb
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Date deposited: 07 Sep 2020 16:30
Last modified: 16 Mar 2024 09:14
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Contributors
Author:
O.J. Morris
Author:
K.G. Wilcox
Author:
C.R. Head
Author:
A.P. Turnbull
Author:
I. Farrer
Author:
H.E. Beere
Author:
D.A. Ritchie
Author:
A.C. Tropper
Editor:
Jennifer E. Hastie
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