High power, high brightness 2 W (200 μm) and 3 W (500 μm) CW AlGaAs laser diode arrays with long lifetimes

Sakamoto, Masamichi; Welch, David; Yao, Huixuan; Endriz, John G.; Scifres, D. R.

doi:10.1049/el:19900475

Cited by 8 publications

(1 citation statement)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In spite of high electrical-to-optical conversion efficiency (about 50--60%) and effective thermal mounting of the devices to a heat sink, a large amount of loss power leads to a considerable increase of temperature in the active zone of the laser diode under high-power operation. As a result, the threshold current shifts to higher values, the output power and the efficiency are reduced due to increasing nonradiative recombination, the emission wavelength shifts to longer wavelength, and the degradation process is accelerated [3].…”

Section: Introductionmentioning

confidence: 99%

Influence of heat source distributions in GaAs/GaAlAs quantum-well high-power laser arrays on temperature profile and thermal resistance

Puchert

Menzel

Bärwolff

et al. 1997

Journal of Thermal Analysis

View full text Add to dashboard Cite

The thermal behaviour of high-power GaAIAs/GaAs laser arrays is described by a comprehensive thermal two-dimensional finite-element model which takes several heat sources into account. The influence of these different heat sources on the two-dimensional temperature distribution in the laser array has been investigated. The power densities of the heat sources related to the active region were calculated by an analytic description of the temperature dependent processes as spontaneous emission, Auger recombination and interface recombination. The results of our numerical calculation show, that the local distribution of the heat sources has a strong influence on the lateral temperature profile and on the maximum temperature in the active region of the array, i.e. on the thermal resistance. The calculated temperature profiles are in a good agreement with the measured lateral temperatures at different injection currents and heat sink temperatures. The difference between calculated and measured maximum temperature is lower than 0.75"C.

show abstract

Section: Introductionmentioning

confidence: 99%