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Thermal and optical performance of cryogenically cooled laser diode bars mounted on pin-finned microcoolers.
- Source :
-
Applied Physics B: Lasers & Optics . Mar2021, Vol. 127 Issue 3, p1-9. 9p. - Publication Year :
- 2021
-
Abstract
- This study investigates the thermal performance of cryogenic micro-pin fin coolers for high-power laser diode (LD) bars. An open-loop liquid nitrogen cooling system, used to operate LD bars at cryogenic temperatures, is developed and characterized. The comparison study demonstrates that the total thermal resistance value of the micro-pin fin cooler, ranging from 0.03 to 0.04 °C/W, is only 1/3 of that of the micro-gap cooler and, thus, contributes significantly to reducing the LD operating temperature and enhancing its efficiency. In this study, the peak optical power of 68.8 W was observed at an LD bar package base temperature of − 100 °C, providing a 20% increase relative to the optical power of 57.3 W for a nominal operating condition with an LD bar package base temperature of 41 °C. This result clearly illustrates the enhancement in optical performance made possible by cryogenic cooling with a pin fin microcooler. [ABSTRACT FROM AUTHOR]
- Subjects :
- *THERMAL resistance
*LIQUID nitrogen
*COOLING systems
WESTERN countries
Subjects
Details
- Language :
- English
- ISSN :
- 09462171
- Volume :
- 127
- Issue :
- 3
- Database :
- Academic Search Index
- Journal :
- Applied Physics B: Lasers & Optics
- Publication Type :
- Academic Journal
- Accession number :
- 149419419
- Full Text :
- https://doi.org/10.1007/s00340-021-07590-0