Operation
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HBM: public
MXFS
4.2.4.1 Wavelength
Sensors defined as wavelength will show wavelength in nm as an output. Both
absolute wavelength values or relative wavelength values can be chosen:
Fig. 4.16
Wavelength Absolute and Wavelength Relative sensor types
Wavelength Relative is the “raw” value out of MXFS device. That means that it
is the wavelength variation of the FBG peak in that channel. No calculation is
performed on the signal, as all is processed inside the device (see
sec
tion 3.5.1.7 “Signals”, page 33
for more details).
Wavelength Relative
λ
*
λ
0
Wavelength absolute computes the absolute FBG peak value based on the
Wavelength relative and the defined reference wavelength. The reference
wavelength is retrieved from the channel properties of the device:
Wavelength Absolute
(
λ
*
λ
0
)
)
λ
0
+
λ
