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Characteristics of coherent two-dimensional grating surface emitting diode laser arrays during CW operation

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20 Author(s)
Evans, G.A. ; David Sarnoff Res. Center, Princeton, NJ, USA ; Bour, D.P. ; Carlson, N.W. ; Amantea, R.
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Recent progress in the development of monolithic two-dimensional coherent grating surface emitting (GSE) laser arrays is presented. Such GSE arrays have operated continuously to more than 3 W/surface and pulsed to more than 30 W/surface. They have achieved continuous wave (CW) threshold current densities of under 140 A/cm2 with CW differential quantum efficiencies of 20-46% per surface. Linewidths in the 40-100 MHz range were obtained with output powers of 100-300 mW per surface. The arrays typically consist of 10-30 mutually injection coupled gain sections with 10 laterally coupled ridge-guided lasers in each gain section. A single GaInAs strained-layer quantum well with a graded-index separate confinement heterostructure (GRINSCH) geometry allows junction down mounting with light emission through the transparent GaAs substrate. A surface relief grating is used for feedback and outcoupling

Published in:

Quantum Electronics, IEEE Journal of  (Volume:27 ,  Issue: 6 )

Date of Publication:

Jun 1991

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