A Balancing Technique For Optical Fibre Intensity Modulated Transducers

B. Culshaw; J. Foley; I. P. Giles

doi:10.1117/12.945068

12 November 1984 A Balancing Technique For Optical Fibre Intensity Modulated Transducers

B. Culshaw, J. Foley, I. P. Giles

Proceedings Volume 0514, 2nd Intl Conf on Optical Fiber Sensors: OFS'84; (1984) https://doi.org/10.1117/12.945068
Event: 2nd International Conference on Optical Fiber Sensors, 1984, Stuttgart, Germany

Abstract

Optical fibre intensity modulated transducers are attractive in their inherent simplicity and the high sensitivity which can be achieved with relatively simple design. However, they are prone to errors due to variations in the attenuation of feed and return fibre paths, in the optical power levels launched at the receiver and in the sensitivity of the photodetectors. This paper presents a technique whereby all these sources of error may be exactly nulled using an optical analogue to a Wheatstone bridge network. Any spurious readings are then entirely due to deficiencies in the design of the transducer head itself.

Citation Download Citation

B. Culshaw, J. Foley, and I. P. Giles "A Balancing Technique For Optical Fibre Intensity Modulated Transducers", Proc. SPIE 0514, 2nd Intl Conf on Optical Fiber Sensors: OFS'84, (12 November 1984); https://doi.org/10.1117/12.945068

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