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Lateral optical confinement of channeled-substrate-planar lasers with GaAs/AlGaAs substratesA physical explanation of the lateral guiding mechanism in channeled-substrate-planar (CSP) lasers based on the amount of wavefront tilt of the transverse field outside the channel region is presented. Because of this inherent wavefront tilt, all CSP lasers will have a very slight asymmetry in their transverse far-field pattern. The nature of the guiding mechanism does not require light absorption by the substrate. Design curves showing the complex lateral effective index step as a function of n-clad thickness with the active layer as a parameter are also presented. Depending on the specific layer compositions and thicknesses, the CSP guiding mechanism can provide a positive lateral index step for substrates with mole fractions of AlAs ranging from 0 to higher than 0.2.
Document ID
19880058553
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Evans, Gary A.
(David Sarnoff Research Center Princeton, NJ, United States)
Butler, Jerome K.
(Southern Methodist University Dallas, TX, United States)
Masin, Valerie J.
(Analytic Sciences Corp. Reading, MA, United States)
Date Acquired
August 13, 2013
Publication Date
May 1, 1988
Publication Information
Publication: IEEE Journal of Quantum Electronics
Volume: 24
ISSN: 0018-9197
Subject Category
Lasers And Masers
Accession Number
88A45780
Funding Number(s)
CONTRACT_GRANT: NAS1-17441
Distribution Limits
Public
Copyright
Other

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