Fiber-optic Fabry-Perot sensor system using a low-coherence LED light source /
The objective of this research was to design and fabricate a low-cost sensor system with a low-cost light emitting diode (LED) light source. The system was designed to perform as the same functions as a sensor system with a laser light source. A dual fiber Fabry-Perot interferometer (FFPI) sensor...
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| Format: | Thesis Book |
| Language: | English |
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[Place of publication not identified] :
[publisher not identified] ;
1995.
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| Online Access: | http://proxy.library.tamu.edu/login?url=http://proquest.umi.com/pqdweb?did=742164481&sid=1&Fmt=2&clientId=2945&RQT=309&VName=PQD |
| Summary: | The objective of this research was to design and fabricate a low-cost sensor system with a low-cost light emitting diode (LED) light source. The system was designed to perform as the same functions as a sensor system with a laser light source. A dual fiber Fabry-Perot interferometer (FFPI) sensor system with a low-coherence communication-system LED as a light source is investigated to detect static and dynamic signals. In this system, there are two FFPI'S: the sensor FFPI and the reference FFPI. When the perturbation of interest, such as temperature or pressure, disturbs the sensor FFPI to produce a phase shift, the light reflected from the sensor is demodulated by the reference FFPI to extract the measurand. The low-power (sub-nW) optical signal is converted to an electrical signal and processed by an optical receiver. A feedback control circuit to the reference FFPI compensates the optical pathlength difference to maintain the optimal operating point. Analytical and experimental results on this sensor system are presented. |
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| Item Description: | Vita. "Major subject: Electrical Engineering". |
| Physical Description: | xiii, 93 leaves : illustrations ; 28 cm. Issued also on microfiche from United Microfilms Inc. |
| Bibliography: | Includes bibliographical references. |