Surface-emitting distributed feedback semiconductor laser

Macomber, S. H.; Mott, J. S.; Noll, R. J.; Gallatin, G. M.; Gratrix, E. J.; O’Dwyer, S. L.; Lambert, S. A.
August 1987
Applied Physics Letters;8/17/1987, Vol. 51 Issue 7, p472
Academic Journal
Electrically pumped, surface-emitting distributed feedback lasers were for the first time demonstrated without any facet reflections. The devices contained second-order gratings etched into a thin p-AlGaAs cladding layer surface. A gold ohmic contact deposited directly onto the p-AlGaAs grating surface provided strong coupling to the waveguide mode. Single spatial mode devices with low divergence output beams and single frequency spectra were obtained at room temperature.


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