Measurement of the spectral characteristics of telecommunication fiber emitted at high temperatures

The fiber optic sensors have a great possibilities thanks to its sizes, features and usage possibilities in measurement engineering. Optical fiber is mostly used as a medium for the transfer of information, but if we consider an optical fiber as a sensor then the other usage can be found for example in medicine or biology. If the optical fiber is heated by sufficiently high temperature, the light signal starts to be emitted in the internal structure. This signal has a spectral characteristic, which can be used for evaluation of temperature thanks to quality analysis. The article will describe the evaluation of spectral characteristics for utilizationof optical fiber as fiber optic sensor for very high temperatures.