Investigation of Fiber-Optic Fabry-Perot pressure sensors /
A new fiber optic sensor technology has been developed for the measurement of pressure differentials across mechanical barriers. The sensing element is an optical fiber Fabry-Perot interferometer (FFPI) fabricated in a single mode fused silica (S'02) optical fiber. Immunity to electromagnetic...
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| Format: | Thesis Book |
| Language: | English |
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[Place of publication not identified] :
[publisher not identified] ;
1996.
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| Subjects: | |
| Online Access: | http://proxy.library.tamu.edu/login?url=http://proquest.umi.com/pqdweb?did=743267141&sid=1&Fmt=2&clientId=2945&RQT=309&VName=PQD |
| Summary: | A new fiber optic sensor technology has been developed for the measurement of pressure differentials across mechanical barriers. The sensing element is an optical fiber Fabry-Perot interferometer (FFPI) fabricated in a single mode fused silica (S'02) optical fiber. Immunity to electromagnetic interference (EMI) and the ability to operate at much higher temperatures (to over IOOO'C) than conventional pressure sensors, make it as a candidate for industrial applications. Multiplexing of numerous FFPI sensors along a fiber optic line with a single light source and photodetector is also possible. For direct measurement of acoustic wave and static pressure, a design in which the length of the FFPI is determined by a motion of a thin diaphragm is investigated. A model for the mechanical response of the sensor, the fabrication method, and experimental results for acoustic wave and static pressure designs are presented. Sound pressure level as low as 69 dB has been detected from the FFPI acoustic wave sensor, which can be used as an optical fiber microphone. The static pressure sensor has a measurement sensitivity in the torr range for applications such as intercranial pressure measurement. The sensitivity and dynamic range can be adjusted by changing the parameters in the sensor design. |
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| Item Description: | Vita. "Major Subject: Electrical Engineering". |
| Physical Description: | x, 94 leaves : illustrations ; 28 cm. Issued also on microfiche from University Microfilms Inc. |
| Bibliography: | Includes bibliographical references. |