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Measurement, Instrumentation, and Sensors Handbook, Second Edition, 2nd Edition
book

Measurement, Instrumentation, and Sensors Handbook, Second Edition, 2nd Edition

by John G. Webster, Halit Eren
February 2014
Intermediate to advanced content levelIntermediate to advanced
1921 pages
82h 13m
English
CRC Press
Content preview from Measurement, Instrumentation, and Sensors Handbook, Second Edition, 2nd Edition
52-11Laser Output Measurement
When R is close to 1, the right-hand side of Equation 52.18 is close to zero. We have
φ
FWHM
=
2 1
2
1 2
( )
/
R
R
(5
2
.19
)
Equation
52.19 sh
ows
th
at
th
e
fr
inge
wi
dth
of I re
duces
as R is in
creased,
be
cause
la
rger
R re
sults
in
mo
re
re
ections
be
tween
th
e
tw
o
in
ner
su
rfaces
of th
e
SF
PI
. In an SF
PI,
th
e
be
am
is us
ually
ar
ranged
to
incident at normal on the inner surface. θ becomes zero. Combining Equations 52.10 and 52.16 results in
λ
=
2D
m
(5
2
.20
)
where
λ is th
e
wa
velength
at wh
ich
th
e
pe
ak
of I ap
pears
. Fi
gure
52.8 sh
ows
th
at
an SF
PI
fu
nctions
li
ke
a mu
ltibandpass
l
ter
. e ce
ntral
wa
velengths
of th
e
ba
nds
(f
ringes)
ar
e
gi
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Publisher Resources

ISBN: 9781439848913