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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.
Original language | English |
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Title of host publication | Vertical External Cavity Surface Emitting Lasers (VECSELs) III |
DOIs | |
Publication status | Published - 15 Apr 2013 |
Event | Vertical External Cavity Surface Emitting Lasers (VECSELs) III - San Francisco, CA, United States Duration: 3 Feb 2013 → 5 Feb 2013 |
Publication series
Name | Proceedings of SPIE - The International Society for Optical Engineering |
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Volume | 8606 |
ISSN (Print) | 0277-786X |
Conference
Conference | Vertical External Cavity Surface Emitting Lasers (VECSELs) III |
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Country/Territory | United States |
City | San Francisco, CA |
Period | 3/02/13 → 5/02/13 |
Keywords
- Cryogenic
- OPSL
- optically pumped
- semiconductor disk laser
- VECSEL
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Computer Science Applications
- Applied Mathematics
- Electrical and Electronic Engineering
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Dive into the research topics of 'Effects of cryogenic temperatures on the performance of CW VECSELs'. Together they form a unique fingerprint.Projects
- 1 Finished
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Tuneable Gigahertz Mode Spaced Frequency Combs (Fellowship)
Wilcox, K. (Investigator)
Engineering and Physical Sciences Research Council
1/10/13 → 28/02/18
Project: Research