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Optics for Engineers
book

Optics for Engineers

by Charles A. DiMarzio
August 2011
Intermediate to advanced content levelIntermediate to advanced
564 pages
20h 45m
English
CRC Press
Content preview from Optics for Engineers
POLARIZED LIGHT 173
From source
To detector
To and from
target
QWP
Figure 6.24 The optical T/R switch. We want to transmit as much light as possible through
the beam splitter and detect as much as possible on reflection.
where F
target
is the fraction of the light incident on the target that is returned to the system.
The goal is to maximize
(
1 R
)
R. Solving d
[
(
1 R
)
R
]
/dR = 0, we obtain a maximum at
R = 1/2 where
(
1 R
)
R = 1/4, which is a loss of 6 dB. However, the conservation law
only holds for a given polarization. We have already seen polarization-splitting cubes, where
T
p
and R
s
both approach unity. All that is needed is a quarter-wave plate in the target ...
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Publisher Resources

ISBN: 9781439807255