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Proceedings Paper

Low-threshold grating surface-emitting laser arrays
Author(s): Gary A. Evans; Nils W. Carlson; David P. Bour; So Kuen Liew; Robert Amantea; Christine A. Wang; Hong K. Choi; James N. Walpole; Jerome K. Butler; W. E. Ferguson
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Paper Abstract

Performance trends in the development of monolithic two-dimensional, coherent grating surface emitting (GSE) laser arrays are presented. Such GSE arrays now operate continuously to more than 3 W/surface and pulsed to more than 30 W/surface. They have obtained cw threshold current densities of under 140 A/cm2 with cw differential quantum efficiencies of 20 to 30% per surface. Linewidths in the 50 MHz range have been obtained with output powers of up to 270 mW per surface. The arrays typically consist of 10 to 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 geometry allows junction down mounting with light emission through the transparent GaAs substrate. A surface relief grating is used for feedback and outcoupling.

Paper Details

Date Published: 1 July 1991
PDF: 8 pages
Proc. SPIE 1418, Laser Diode Technology and Applications III, (1 July 1991); doi: 10.1117/12.43827
Show Author Affiliations
Gary A. Evans, David Sarnoff Research Ctr. (United States)
Nils W. Carlson, David Sarnoff Research Ctr. (United States)
David P. Bour, David Sarnoff Research Ctr. (United States)
So Kuen Liew, David Sarnoff Research Ctr. (United States)
Robert Amantea, David Sarnoff Research Ctr. (United States)
Christine A. Wang, Lincoln Lab./MIT (United States)
Hong K. Choi, Lincoln Lab./MIT (United States)
James N. Walpole, Lincoln Lab./MIT (United States)
Jerome K. Butler, Southern Methodist Univ. (United States)
W. E. Ferguson, Southern Methodist Univ. (United States)

Published in SPIE Proceedings Vol. 1418:
Laser Diode Technology and Applications III
Daniel S. Renner, Editor(s)

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