January 2016
Beginner
170 pages
6h 22m
English
Content preview from Optoelectronic Line Transmission
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Transmitters
-
light
emitting
diodes
and
lasers
77
Confining
Active
Confining
layer
layer
layer
Figure
4.9
Advantages of a
double
heterostructure
make-up
Excess
carrier
concentration
Conduction
band
Refractive
index
η
type
00000060000000
ρ
type
valence
band
Photon
Photon
density
78
Optoelectronic
Line
Transmission
Figure
4.10 Lateral
Spatial
confinement of a
laser diode's active
region
As
the wider band gap effectively has a smaller refrac-
tive
index, sandwiching the active layer between two
such
layers produces a similar effect to
that
foun
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