Paper
31 August 2000 Optical low-cost temperature point sensor
Christian Helmig, Joerg Teunissen
Author Affiliations +
Proceedings Volume 4074, Applications of Optical Fiber Sensors; (2000) https://doi.org/10.1117/12.397883
Event: Symposium on Applied Photonics, 2000, Glasgow, United Kingdom
Abstract
In the area of high-voltage apparatus only the use of optical sensors offers the possibility to watch important measurands, e.g. current, voltage, partial discharge and temperature, in regions of high electric or magnetic fields. Among other concepts optical point sensors are able to detect the temperature. The new temperature point sensor is based on the measurement of a varying linear birefringence in optical fibers, produced by the thermal influence of epoxy adhesives. On the basis of the different thermal expansion coefficients of the fiber and the adhesive, a temperature change results in mechanical pressure. Because of this pressure a linear birefringence is induced into the fiber and the polarization of the light is influenced. Experimental investigations show a significant and repeatable temperature dependence of the ellipticity of the light in the range of measurement between 10 degree(s)C and +120 degree(s)C.
© (2000) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Christian Helmig and Joerg Teunissen "Optical low-cost temperature point sensor", Proc. SPIE 4074, Applications of Optical Fiber Sensors, (31 August 2000); https://doi.org/10.1117/12.397883
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KEYWORDS
Sensors

Temperature metrology

Adhesives

Transformers

Birefringence

Fiber optics sensors

Epoxies

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