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Optical Fiber Telecommunications VA, 5th Edition
book

Optical Fiber Telecommunications VA, 5th Edition

by Ivan Kaminow, Alan E. Willner, Tingye Li
July 2010
Intermediate to advanced content levelIntermediate to advanced
944 pages
34h 12m
English
Academic Press
Content preview from Optical Fiber Telecommunications VA, 5th Edition
compressively strained QW lasers have a similar trend for LEF and are better than
the lattice-matched laser in terms of low chirp for high-speed modulation appl ica-
tions. LEF factor can be decreased by adding strain in QW lasers and can be
further decreased by adding p-doping in the strained active region [26–29].
3.3 HIGH-SPEED DIRECT MODULATION OF STRAINED
QW LASERS
3.3.1 Theory for High-Speed Small-Signal Modulation
Response
Based on the rate equation model, for a small signal electrical injection, I(t) = I
0
þ
i(!)e
j!t
, the normalized modulation response for the output light is given by [16, 17]
Mð!Þ
Mð0Þ
=
!
2
r
ð1 þ j!
bw
Þð!
2
r
!
2
þ j!Þ
(3.16)
!
2
r
=
ðv
g
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Publisher Resources

ISBN: 9780123741714