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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
must be made insensitive to temperature. Therefore, the groove is designed to
satisfy the following conditions
n
c
DL = n
c
D þ
^
n
c
D
^
, (9.27)
and
dð
n
c
DLÞ
dT
=
dn
c
dT
D þ
d
^
n
c
dT
D
^
= 0, (9.28)
where
^
n is the refractive index of silicone and DL and D
^
are the path-length
differences of silica waveguides and silicone region, respectively. Equation (9.27)
is a condition to satisfy the AWG specifications and Eqn (9.28) is the athermal
condition, respectively. The temperature sensitivity of silicone is d
^
n
c
=dT ¼37
10
5
(deg
1
). Therefore, the path-length difference of silicone is D
^
D‘=37.Figure
9.42 shows temperature dependencies of passband center wavelength ...
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Publisher Resources

ISBN: 9780123741714