October 2014
Intermediate to advanced
718 pages
32h 33m
English
Content preview from Handbook of Optical Sensors
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477DistributedFiber-OpticSensorsBasedonLightScatteringinOpticalFibers
Chapter 16
RzT
Iz
Iz
f
AS
S
(, )
()
()
,
==
detected reflection
detected reflection
λ zzf z
fzfz kTz
AS
S
S
AS
M
B
()()
()()
−
λ
λλ
λ
λ
ω
,
,, ()
4
exp
(16.64)
Obviously, this ratio cannot be directly used to nd the temperature T(z) if the ratio
f(λ
AS
,z)/f(λ
S
,z) is unknown. Note the same factor f(λ,z) appearing both in the numerator
and denominator emphasizes the fact that the exciting laser eld also experiences atten-
uation as it goes to the location z to induce the Raman Stokes and anti-Stokes scattering
signal. In the dual-end method (Fernandez et al. 2005), it is proposed that one measu ...
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