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73% CW power conversion efficiency at 50 W from 970 nm diode laser bars

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6 Author(s)
Kanskar, M. ; Alfalight Inc., Madison, WI, USA ; Earles, T. ; Goodnough, T.J. ; Stiers, E.
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970 nm emitting diode laser bars of broad-waveguide design have been optimised for maximum power conversion efficiency (PCE). 73% PCE at 50 W CW output power is achieved from 20% fill-factor, 1 cm diode laser bars mounted on microchannel-cooled heatsinks. The improvement is mainly the result of an increase in injection efficiency via moderately low doping of the broad-waveguide core, and reductions in operating voltage via doping optimisation of the broad-waveguide structure.

Published in:

Electronics Letters  (Volume:41 ,  Issue: 5 )

Date of Publication:

3 March 2005

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