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Optical Fiber Telecommunications VB, 5th Edition
book

Optical Fiber Telecommunications VB, 5th Edition

by Ivan Kaminow, Tingye Li, Alan E. Willner
July 2010
Intermediate to advanced content levelIntermediate to advanced
928 pages
33h 42m
English
Academic Press
Content preview from Optical Fiber Telecommunications VB, 5th Edition
For !
I
<< !
s
the output current from the photodiode is proportional to V
in
V
in
so that
i / E
2
sp
þ E
2
LOp
þ 2 E
sp
E
LOp
cos !
I
t þ
LO
s
ðÞ(18.13)
It is convenient to rewrite Eqn (18.13) in terms of optical power since that is a
directly measurable quantity. Using
E
2
sp
=
2Z
o
P
o
G
l
A
(18.14)
and
E
2
LOp
=
2Z
o
P
LO
A
; (18.15)
where Z
o
is the impedance of the medium where the power is measured, P
o
is the
source outpu t power, and A is the photodiode area,
i = RP
o
G
l
þ P
LO
þ 2
ffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffi
P
o
G
l
P
LO
p
cos !
I
t þ
LO
s
ðÞ

(18.16)
The first two terms represent direct detection of the signal and LO, respectively.
The third term is of more interest. First, its magnitude is proportional ...
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Publisher Resources

ISBN: 9780123741721