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Silicon monolithic microchannel-cooled laser diode array

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8 Author(s)
Skidmore, J.A. ; Lawrence Livermore National Laboratory, P.O. Box 808, L-482, Livermore, California 94551 ; Freitas, B.L. ; Crawford, J. ; Satariano, J.
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A monolithic microchannel-cooled laser diode array is demonstrated that allows multiple diode-bar mounting with negligible thermal cross talk. The heat sink comprises two main components: a wet-etched Si layer that is anodically bonded to a machined glass block. The continuous wave (cw) thermal resistance of the 10 bar diode array is 0.032 °C/W, which matches the performance of discrete microchannel-cooled arrays. Up to 1.5 kW/cm2 is achieved cw at an emission wavelength of ∼808 nm. Collimation of a diode array using a monolithic lens frame produced a 7.5 mrad divergence angle by a single active alignment. This diode array offers high average power/brightness in a simple, rugged, scalable architecture that is suitable for large two-dimensional areas. © 2000 American Institute of Physics.

Published in:

Applied Physics Letters  (Volume:77 ,  Issue: 1 )