Elevated temperature operation of laser diodes for pumping

J. Stanley Whiteley

doi:10.1117/12.146939

16 June 1993 Elevated temperature operation of laser diodes for pumping

J. Stanley Whiteley

Proceedings Volume 1865, Diode Pumping of Average-Power Solid State Lasers; (1993) https://doi.org/10.1117/12.146939
Event: OE/LASE'93: Optics, Electro-Optics, and Laser Applications in Scienceand Engineering, 1993, Los Angeles, CA, United States

Abstract

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.

Citation Download Citation

J. Stanley Whiteley "Elevated temperature operation of laser diodes for pumping", Proc. SPIE 1865, Diode Pumping of Average-Power Solid State Lasers, (16 June 1993); https://doi.org/10.1117/12.146939

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KEYWORDS

Diodes

Semiconductor lasers

Heatsinks

Resistance

Thermal effects

External quantum efficiency

Temperature metrology

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