Optical temperature sensor using Eu^3+-doped fluoride glass

1 March 1986

journal article
Published by Optica Publishing Group in Applied Optics

Vol. 25 (5) , 720-723
https://doi.org/10.1364/ao.25.000720

Abstract

A thermooptical temperature sensor suitable for low temperatures is proposed. Eu³⁺-doped fluoride glass can be used as a thermooptical transducer, since its optical absorption intensity for the ⁷F₁—⁷F₆ transition, which occurs at 2.2 μm, is modulated by temperature. Temperature resolving power is confirmed to be 0.5 K in the 77–150 K range using a Eu³⁺-doped fluoride fiber. The applicable temperature range and resolving power are varied with the doping content of the Eu³⁺ ion.

Keywords

ABSORPTION COEFFICIENT
CHALCOGENIDE GLASS
LIGHT DETECTION
LIGHT INTENSITY
OPTICAL ABSORPTION
TEMPERATURE SENSORS

This publication has 2 references indexed in Scilit:

Fiber-optic instrument for temperature measurement
IEEE Journal of Quantum Electronics, 1982
Optically Active Binary Liquid Crystal Thermometry
IEEE Transactions on Biomedical Engineering, 1979