A new signal processing technique for fiber optic interferometric sensors /
A new signal processing technique for fiber optic Microfilm Inc. interferometric sensors is presented. This technique provides a way to monitor interferometric sensors such that high accuracy is maintained even using relatively inexpensive Fabry- perot (FP) lasers, as a basis for implementing low-co...
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| Format: | Thesis Book |
| Language: | English |
| Published: |
[Place of publication not identified] :
[publisher not identified] ;
1998.
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| Subjects: | |
| Online Access: | http://proxy.library.tamu.edu/login?url=http://proquest.umi.com/pqdweb?did=733039131&sid=1&Fmt=2&clientId=2945&RQT=309&VName=PQD |
| Summary: | A new signal processing technique for fiber optic Microfilm Inc. interferometric sensors is presented. This technique provides a way to monitor interferometric sensors such that high accuracy is maintained even using relatively inexpensive Fabry- perot (FP) lasers, as a basis for implementing low-cost, high performance fiber optic sensor systems.Application of this technique in temperature measurement has been demonstrated with a fiber optic Fabry-Perot Interferometer (FFPI) as a sensing head. Good performance of temperature sensor is obtained using a low-quality multimode FP laser, and even better performance is observed with a distributed feedback (DFB) laser diode. The accuracies are measured to be 4.58% for a FP laser and 2.32% for a DFB laser, respectively. However, the unambiguous measurement range is limited to - 7CO using a laser diode as a light source emitting at a wavelength of 1 .3-pm. Dual wavelength technique is employed to overcome this limitation. The unambiguous dynamic range is extended to - 43C0 using one 1.3-jtm laser diode and one 1.55-gm laser diode. Further improvement in dynamic range using lasers with a smaller wavelength separation is possible. |
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| Item Description: | Vita. "Major Subject: Electrical Engineering". |
| Physical Description: | x, 92 leaves : illustrations ; 28 cm. |
| Bibliography: | Includes bibliographical references (leaves 69-72). |