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Sensors (Basel). 2018 Feb 6;18(2). pii: E483. doi: 10.3390/s18020483.

Fiber-Optic Pyrometer with Optically Powered Switch for Temperature Measurements.

Author information

1
Electronics Technology Department, University Carlos III of Madrid, 28911 Leganés, Spain. cvazquez@ing.uc3m.es.
2
Electronics Technology Department, University Carlos III of Madrid, 28911 Leganés, Spain. saperezp@ing.uc3m.es.
3
Electronics Technology Department, University Carlos III of Madrid, 28911 Leganés, Spain. julopezc@ing.uc3m.es.
4
Electronics Technology Department, University Carlos III of Madrid, 28911 Leganés, Spain. atapetad@ing.uc3m.es.
5
Electronics Technology Department, University Carlos III of Madrid, 28911 Leganés, Spain. 100303714@alumnos.uc3m.es.
6
Electronics Technology Department, University Carlos III of Madrid, 28911 Leganés, Spain.
7
Electronics Technology Department, University Carlos III of Madrid, 28911 Leganés, Spain. dsmontero@ing.uc3m.es.
8
Electronics Technology Department, University Carlos III of Madrid, 28911 Leganés, Spain. pcontrer@ing.uc3m.es.

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.

KEYWORDS:

contactless temperature sensor; fiber-optic; lock-in amplifier; optical chopper; optical switch; power over fiber; pyrometer

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