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Sensors 2018, 18(2), 483; https://doi.org/10.3390/s18020483

Fiber-Optic Pyrometer with Optically Powered Switch for Temperature Measurements

Electronics Technology Department, University Carlos III of Madrid, 28911 Leganés, Spain
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Received: 28 December 2017 / Revised: 26 January 2018 / Accepted: 1 February 2018 / Published: 6 February 2018
(This article belongs to the Special Issue Optical Fiber Sensors 2017)
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Abstract

We report the experimental results on a new infrared fiber-optic pyrometer for very localized and high-speed temperature measurements ranging from 170 to 530 °C using low-noise photodetectors and high-gain transimpedance amplifiers with a single gain mode in the whole temperature range. We also report a shutter based on an optical fiber switch which is optically powered to provide a reference signal in an optical fiber pyrometer measuring from 200 to 550 °C. The tests show the potential of remotely powering via optical means a 300 mW power-hungry optical switch at a distance of 100 m, avoiding any electromagnetic interference close to the measuring point. View Full-Text
Keywords: contactless temperature sensor; fiber-optic; pyrometer; optical switch; power over fiber; optical chopper; lock-in amplifier contactless temperature sensor; fiber-optic; pyrometer; optical switch; power over fiber; optical chopper; lock-in amplifier
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Vázquez, C.; Pérez-Prieto, S.; López-Cardona, J.D.; Tapetado, A.; Blanco, E.; Moreno-López, J.; Montero, D.S.; Lallana, P.C. Fiber-Optic Pyrometer with Optically Powered Switch for Temperature Measurements. Sensors 2018, 18, 483.

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