Characteristics of step‐graded separate confinement quantum well lasers with direct and indirect barriers
作者:
L. M. Miller,
K. J. Beernink,
T. M. Cockerill,
R. P. Bryan,
M. E. Favaro,
J. Kim,
J. J. Coleman,
C. M. Wayman,
期刊:
Journal of Applied Physics
(AIP Available online 1990)
卷期:
Volume 68,
issue 5
页码: 1964-1967
ISSN:0021-8979
年代: 1990
DOI:10.1063/1.347178
出版商: AIP
数据来源: AIP
摘要:
Data are presented on step‐graded separate confinement quantum well lasers with Al0.85Ga0.15As outer confining layers, AlxGa1−xAs barriers and a 50‐A˚ GaAs quantum well grown by metalorganic chemical vapor deposition. By varyingxbfrom 0.15 to 0.60, we show that, given an adequate optical waveguide confinement factor and sufficient cavity length, the collection of electrons in thin quantum wells with either direct or indirect barriers can be highly efficient, transfer of electrons from indirect barriers to thin direct wells does not degrade laser performance, and electron confinement in the separate confinement region plays no role in the operation of the laser.
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