Packing Hundreds of Sensors into a Single Optical Fiber for use in Harsh Environments up to 800 ??C
“WASHINGTON DC, USA -???By fusing together the concepts of active fiber sensors and high-temperature fiber sensors, a team of researchers at the University of Pittsburgh has created an all-optical high-temperature sensor for gas flow measurements that operates at record-setting temperatures above 800 ??C.
“This technology is expected to find industrial sensing applications in harsh environments ranging from deep geothermal drill cores to the interiors of nuclear reactors to the cold vacuum of space missions, and it may eventually be extended to many others.”
They demonstrated simultaneous flow/temperature sensors at 850 ??C, that is a 200????C improvement on an earlier demonstration of MEMS-based sensors by researchers at Oak Ridge National Laboratory.
Online copy of the Optics Letters paper: ???Fiber-optic flow sensors for high-temperature-environment operation up to 800??C,??? R. Chen at al., Optics Letters, Vol. 39, Issue 13, pp. 3966-3969 (2014).