Fiber Optic Temperature Measurement Technology OPERATING PRINCIPLE § Based on a well known and reproducible phenomenon o
100%
The band-gap variation in the absorption spectrum of the semiconductor GaAs (Gallium Arsenide) with respect to temperature
§ GaAs can also be looked at as a variable optical filter (low pass) o
Wavelengths towards visible are blocked
o
Wavelengths towards infrared are transmitted
§ A Direct Contact temperature sensor § GaAs material properties will never change with time, ever !
1
o
No DRIFT…
o
No RECALIBRATION…
0% ï Visible
Infrared ð