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Spatially singlemode broad-area semiconductor laser with planar external cavity

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4 Author(s)
M. Kolesnikov ; Photo-digm Inc., Richardson, TX, USA ; J. Castillega ; N. Bhandarkar ; N. Stelmakh

A broad-area laser diode combined with a planar external waveguide cavity operates in the fundamental mode and reshapes the output emission into a circular 15° beam. A 500 μm-long by 40 μm-wide laser diode with uncoated facets coupled with the uncoated ModeReShaper (MRS) planar chip has a coupling efficiency of ∼40% and stabilised the fundamental mode at drive currents up to three-times threshold.

Published in:

Electronics Letters  (Volume:40 ,  Issue: 13 )