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Browse Journals & Magazines > Electronics Letters ...> Volume:23 Issue:10 Help

Properties of quarter-wave-shifted DFB lasers in the presence of a taper

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1 Author(s)
Westbrook, L.D. ; British Telecom Research Laboratories, Ipswich, UK

The deleterious effect of a taper on the properties of quarterwave-shifted DFB lasers is analysed to assess the tolerance of these potentially useful single-frequency lasers to variations in epitaxial layer thickness, composition or in the DFB grating period. The maximum tolerable variation in any of these parameters is shown to be relatively insensitive to the grating coupling strength. The maximum tolerable thickness variation depends principally on the derivative of the laser waveguide effective index with respect to epilayer thickness and, for typical diode parameters, lies in the range 150¿1500 Å.

Published in:
Electronics Letters  (Volume:23 ,  Issue: 10 )

Date of Publication: May 7 1987

Page(s):
518 - 520
ISSN :
0013-5194
Digital Object Identifier :
10.1049/el:19870374
Date of Current Version :
11 July 2007
Issue Date :
May 7 1987
Sponsored by :
Institution of Engineering and Technology

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