Optically powered thermistor with optical fiber link

Jinshan Shi; Yutian Wang

doi:10.1117/12.49986

1 August 1991 Optically powered thermistor with optical fiber link

Jinshan Shi, Yutian Wang

Proceedings Volume 1572, International Conference on Optical Fibre Sensors in China OFS(C) '91; (1991) https://doi.org/10.1117/12.49986
Event: International Conference on Optical Fibre Sensors in China, 1991, Wuhan, China

Abstract

An optically powered thermistor transducer for measuring temperature is introduced. Both signal and supply power are transmitted by optical fiber in opposite directions between probe and main frame. The probe, which includes measuring and light transmission circuits, consumes only about 27.5 (mu) W, because it uses all CMOS chips and a special modulation scheme to reduce its electrical consumption. If LED is used as the power source and plastic optical fiber ((phi) equals 1 mm) as power transmission, the optically powered distance is less than one m. If SD as optical source and silicon optical fiber ((phi) equals 0.2 mm) as power transmission are to be used, the powered distance can get up to several hundred meters.

Citation Download Citation

Jinshan Shi and Yutian Wang "Optically powered thermistor with optical fiber link", Proc. SPIE 1572, International Conference on Optical Fibre Sensors in China OFS(C) '91, (1 August 1991); https://doi.org/10.1117/12.49986

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