Fiber-Optic Temperature Sensor Using A Spectrum-Modulating Semiconductor Etalon
Proc. SPIE 0838, Fiber Optic and Laser Sensors V, 238 (March 23, 1988); doi:10.1117/12.942513

This paper describes a fiber-optic temperature sensor that uses a spectrum-modulating SiC etalon. The spectral output of this type of sensor may be analyzed to obtain a temperature measurement which is largely independent of the transmission properties of the sensor's fiber-optic link. A highly precise laboratory-type spectrometer is described in detail, and this instrument is used to study the properties of this type of sensor. Also described are a number of different spectrum analyzers that are suitable for use in a practical thermometer.