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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
The two-photon state at the output of the fiber is calculated by means of first-
order perturbation theory, i.e.,
ji= j0
1
ih
Z
1
1
H
I
ðtÞdtj0i: (21.11)
Retaining of higher order terms in the perturbation series involves generation of
multiphoton states, which will be ignored in our calculation owing to their
smallness. We can see that only the FPS terms in the interaction Hamiltonian
contribute to the formation of the signal/idler two-photon state. This is because all
terms vanish when acting on the vacuum state j0i with the exception of
E
ðÞ
s
E
ðÞ
i
E
ðþÞ
p
E
ðþÞ
p
þ h:c:, which we denote as
H
FPS

0
ð3Þ
Z
V
dVðE
ðÞ
s
E
ðÞ
i
E
ðþÞ
p
E
ðþÞ
p
þ h:c:Þ; (21.12)
where = 2
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Publisher Resources

ISBN: 9780123741714