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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
365EDF Ampliers and Simulink
®
Models
in
s
tate
2. H
ence,
t
he
t
ransition
r
ate
W
13
should be very close to transition W
32
due to the
shorter
l
ifetime.
W
e
t
hus
h
ave
W
32
W
13
. Substituting this into Equation (9.2) we have
= +
n
t
W n W n W n
n
2
1 2 1 2 1 2 1 3 3
2
2 1
τ
(9.4)
In fact, n
3
, n
2
, and n
1
are independent. However, as mentioned earlier, the erbium ions
are accumulated in state 2 and the population density in n
3
thus can be negligible.
The total population density ρ of the ber is a constant value. Therefore, if n
3
≈ 0, then
n
1
and n
2
are no longer independent of each other and are under the constraint that the
sum of th
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Publisher Resources

ISBN: 9781482217513