The Development Of A Fibre-Optic Disposable Pressure Transducer For Medical Applications

Golby, J. A.; Conway, J. K.; Gaskell, T. A.; Gray, Riley; Storey, Phil; Littlewood, G.; Dickens, Rod; Scott, Ian

doi:10.1117/12.949306

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1993

1994

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“…Small size, electrically passive and flexible construction have made fiber-optic sensors an attractive choice for such applications. Many researchers have proposed a variety of techniques to make miniature pressure sensors using optical fibers [1][2][3]. One of the most frequently encountered problems with fiber-optic sensors is the light leakage due to microbending of the optical fiber and coupler losses that results in erroneous pressure output.…”

Section: Introductionmentioning

confidence: 99%

Miniature fiber optic pressure sensor based on interferometric technique

1994

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An interferometric type fiber-optic pressure sensor is constructed by attaching a 125 zm single-mode fiber inside a 1.4 mm outer diameter miniature tubing capped with a 2.5 m diaphragm. The optical fiber looks at the diaphragm displacement caused by pressure. The gap between the fiber end and the diaphragm forms a Fabry-Perot interferometer. The number of optical fringes at the output is directly related to the pressure acting on the diaphragm. A second sensor is constructed using a 925 j.m outer diameter micro bellows. The fiber-optic sensor data compares well with a strain gauge type pressure transducer.

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Section: Introductionmentioning

confidence: 99%