Dr. J. Stanley Whiteley Profile

Dr. J. Stanley Whiteley

Senior Scientist at Cutting Edge Optronics

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Proceedings Article | 16 June 1993 Paper

Elevated temperature operation of laser diodes for pumping

J. Whiteley

Proceedings Volume 1865, (1993) https://doi.org/10.1117/12.146939

KEYWORDS: Diodes, Semiconductor lasers, Heatsinks, Thermal effects, Resistance, External quantum efficiency, Temperature metrology, Solid state lasers, Quantum efficiency, High power lasers

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Elevated temperature operation of pump arrays holds the possibility for utilizing passive cooling of lasers, even in environments with high ambient temperatures. Traditionally, such arrays have used active cooling to maintain junction temperatures near 30 degree(s)C. Although diode junctions operating at elevated temperatures would still require thermostating to maintain the required output wavelength, simpler thermal control systems could be employed. System level weight and power advantages can be realized through the use of such diode arrays. In this paper, elevated temperature operation of laser diode arrays at up to 90 degree(s)C is reported. These arrays were operated at conditions that would yield up to 1300 W/cm² at the face of a pumping array. In order to address a prime concern in elevated temperature operation, an initial lifetest of these devices is reported. The devices operated for over 350 million shots without catastrophic failure and exhibited a degradation rate of about 4.4% in output power at constant drive current per 100 million shots.

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