Abstract
Thermal simulations based on the finite-element method provide an estimation of what the heat management in membrane external-cavity surface-emitting lasers (MECSELs) is capable of: When considering diamond and SiC heat spreaders, double-side cooling (DSC) leads to gain membrane temperatures that are about a factor two lower than with single-side cooling (SSC). For the thermally worse conductive sapphire, the temperature benefit from DSC can be up to four times lower than with SSC. Diamonds as heat spreaders are recommended over SiC if the power for pumping the gain membrane is three times larger, for instance at 30W at a pump beam diameter of 180 μm. Sapphire can be favored over SiC if the pump power is about five times lower, for instance at 2W. Due to the limited lateral heat flow activity of sapphire, a smaller pump beam diameter of 90 μm is suggested. A super-Gaussian pump beam can be used instead of a Gaussian pump beam to lower the gain membrane maximum temperature by a factor of three. Double-side pumping becomes significantly more important as soon as the gain membrane gets thicker than 1 μm.
Original language | English |
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Title of host publication | Vertical External Cavity Surface Emitting Lasers (VECSELs) XI |
Editors | Mircea Guina |
Publisher | SPIE |
ISBN (Electronic) | 9781510648395 |
DOIs | |
Publication status | Published - 4 Mar 2022 |
Publication type | A4 Article in conference proceedings |
Event | Vertical External Cavity Surface Emitting Lasers - Virtual, Online Duration: 20 Feb 2022 → 24 Feb 2022 Conference number: 11 |
Publication series
Name | Progress in Biomedical Optics and Imaging - Proceedings of SPIE |
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Volume | 11984 |
ISSN (Print) | 1605-7422 |
Conference
Conference | Vertical External Cavity Surface Emitting Lasers |
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Abbreviated title | VECSEL |
City | Virtual, Online |
Period | 20/02/22 → 24/02/22 |
Keywords
- diamond
- double-side cooling
- double-side pumping
- finite-element method
- heat spreaders
- MECSEL
- power scaling capability
- pump beam geometry
- sapphire
- semiconductor membrane lasers
- SiC
- thermal simulations
Publication forum classification
- Publication forum level 1
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics
- Biomaterials
- Radiology Nuclear Medicine and imaging