Temperature sensor with using of optical fibers

Optical fibers can be used in many ways. In addition to telecommunication applications, they are increasingly used in sensory applications as well. The temperature measurement is one of many areas of using of optical fibers. The most commonly used are DTS (Distributed Temperature Sensor) also known as Raman optical time-domain reflectometry (OTDR). The using of fiber Bragg gratings (FBGs) is one of the other options. This paper describes our approach to temperature measurement using optical fibers, heat-sensitive materials and specialty products based on polydimethylsiloxane (PDMS) and other materials. The temperature sensor created by us can also be used in an unfavorable environment (chemical influences, etc.) in the temperature range up to approx. 400 K.