Design of fiber optical high temperature sensors for gas turbine monitoring

Sapphire fiber Bragg gratings for high temperature and dynamic temperature diagnostics

“…In Ref. [10] various optical methods to measure and determine temperatures in gas turbines are discussed. Conventional optical fiber sensors are based on fused silica, which reveals a limit in the maximum reasonable temperature of 1200 C, which is close to the glass transition temperature of fused silica.…”

Fiber optical sensor trends in the energy field

“…In order to go closer to the thermal limits the temperature must be measured very accurately. Arrays of fiber optical Bragg temperature sensors have been used to measure the complete circumferential temperature distribution [7] (Fig. 4).…”

Micro-structured fiber interferometer as sensitive temperature sensor

“…Many different kinds of temperature fiber sensors have been demonstrated by different research groups. A simple structure like a temperature fiber sensor was manufactured using a Fabry-Perot interferometer made between two cleaved sapphire fiber end faces [1]. Nguyen et al [2] reported a temperature sensor using a combination of multi-single-multimode fibers between single mode fibers with a high temperature sensitivity of 88 pm/℃.…”