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Optical Fiber Communication Systems with MATLAB® and Simulink® Models, 2nd Edition
book

Optical Fiber Communication Systems with MATLAB® and Simulink® Models, 2nd Edition

by Le Nguyen Binh
December 2014
Intermediate to advanced content levelIntermediate to advanced
899 pages
32h 28m
English
CRC Press
Content preview from Optical Fiber Communication Systems with MATLAB® and Simulink® Models, 2nd Edition
159Optical Direct and External Modulation
of photon density S(t). Similarly in (5.3), the photon density S(t) is increased by stimu-
lated and spontaneous emission S(t) and decreased by internal and mirror losses with
a photon lifetime τ
p
given by
τ
α α
p
g i m
v
=
+
( )
1
(5.5)
where
α
i
and α
m
denote the waveguide loss coefcients and the mirror loss, respectively.
The
carrier
lifetime,
τ
n
is related to the loss of electrons due to both spontaneous emission
and
n
onradiative
r
ecombination
[
3]
g
iven
b
y
τ
n
sp nr
N t
R R
=
+
( )
(5.6)
where
R
sp
denotes rate of spontaneous emission
R
nr
denotes nonradiative recombination
The
t
ime
v
ariations
o
f
t
he
o
ptical
po
wer
o
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Publisher Resources

ISBN: 9781482217513