Fiber optic sensors and systems at the Federal University of Rio de Janeiro

Marcelo Martins Werneck; Paulo Acioly M. dos Santos; Aldo Pacheco Ferreira; Luis E. Maggi; Carlos Roberto de Carvalho Jr.; R. M. Ribeiro

doi:10.1117/12.321010

19 August 1998 Fiber optic sensors and systems at the Federal University of Rio de Janeiro

Marcelo Martins Werneck, Paulo Acioly M. dos Santos, Aldo Pacheco Ferreira, Luis E. Maggi, Carlos Roberto de Carvalho Jr., R. M. Ribeiro

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Proceedings Volume 3573, OPTIKA '98: 5th Congress on Modern Optics; (1998) https://doi.org/10.1117/12.321010
Event: OPTIKA '98: Fifth Congress on Modern Optics, 1998, Budapest, Hungary

Abstract

As widely known, fiberoptics (FO) are being used in a large variety of sensors and systems particularly for their small dimensions and low cost, large bandwidth and favorable dielectric properties. These properties have allowed us to develop sensors and systems for general applications and, particularly, for biomedical engineering. The intravascular pressure sensor was designed for small dimensions and high bandwidth. The system is based on light-intensity modulation technique and uses a 2 mm-diameter elastomer membrane as the sensor element and a pigtailed laser as a light source. The optical power output curve was linear for pressures within the range of 0 to 300 mmHg. The real time optical biosensor uses the evanescent field technique for monitoring Escherichia coli growth in culture media. The optical biosensor monitors interactions between the analytic (bacteria) and the evanescent field of an optical fiber passing through it. The FO based high voltage and current sensor is a measuring system designed for monitoring voltage and current in high voltage transmission lines. The linearity of the system is better than 2% in both ranges of 0 to 25 kV and 0 to 1000 A. The optical flowmeter uses a cross-correlation technique that analyses two light beams crossing the flow separated by a fixed distance. The x-ray image sensor uses a scintillating FO array, one FO for each image pixel to form an image of the x-ray field. The systems described in these paper use general-purpose components including optical fibers and optoelectronic devices, which are readily available, and of low cost.

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Marcelo Martins Werneck, Paulo Acioly M. dos Santos, Aldo Pacheco Ferreira, Luis E. Maggi, Carlos Roberto de Carvalho Jr., and R. M. Ribeiro "Fiber optic sensors and systems at the Federal University of Rio de Janeiro", Proc. SPIE 3573, OPTIKA '98: 5th Congress on Modern Optics, (19 August 1998); https://doi.org/10.1117/12.321010

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KEYWORDS

Sensors

Fiber optics

Fiber optics sensors

Image sensors

Optical fibers

X-rays

X-ray imaging

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