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Optoisolated temperature sensing with a light‐emitting diode
Author(s) -
Murtaza G.,
Senior J. M.
Publication year - 1996
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/(sici)1098-2760(19960405)11:5<257::aid-mop6>3.0.co;2-d
Subject(s) - broadband , diode , multi mode optical fiber , materials science , light emitting diode , optoelectronics , optics , optical fiber , transmission (telecommunications) , physics , telecommunications , computer science
An experimental demonstration of temperature sensing with an infrared light‐emitting diode (LED) acting as the optoisolated sensor is reported. The exploited sensing mechanism is that of the LED spectral emission variation in response to a slowly varying temperature. A multimode optical fiber is utilized to carry the LED output to a remote location. The temperature‐modulated LED emission spectrum is divided into two semi‐broadband signals in order to create a different output independent of the optical transmission loss variations. Preliminary results demonstrating a resolution of better than 0.1°C over a temperature range of +20 to +80 °C are provided. © 1996 John Wiley & Sons, Inc.