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Signal processing for fiber optic acoustic sensor system
| dc.creator | Zhu, Juhong | |
| dc.date.accessioned | 2012-06-07T23:02:03Z | |
| dc.date.available | 2012-06-07T23:02:03Z | |
| dc.date.created | 2000 | |
| dc.date.issued | 2000 | |
| dc.identifier.uri | https://hdl.handle.net/1969.1/ETD-TAMU-2000-THESIS-Z49 | |
| dc.description | Due to the character of the original source materials and the nature of batch digitization, quality control issues may be present in this document. Please report any quality issues you encounter to digital@library.tamu.edu, referencing the URI of the item. | en |
| dc.description | Includes bibliographical references (leaves 53-56). | en |
| dc.description | Issued also on microfiche from Lange Micrographics. | en |
| dc.description.abstract | A new scheme for optic detection of sound waves based upon fiber optic interferometer is presented. Multiple fiber Fabry-Perot interferometers (FFPI) are used as arrayed sensor elements inside the cable. The sensors are interrogated with light pulses from a single mode laser. Signals from multiple sensors in the array are separated and demultiplexed. The acoustic pressure information is determined by processing the returned optical pulses using a fiber Mach-Zehnder interferometer as an optical phase compensator. Two passive demodulation techniques based on a 3 by 3 output coupler in the Mach-Zehnder interferometer provide a way to eliminate phase fading suffered inside the interferometric sensors. System measurements utilizing the two techniques were demonstrated; and the linearity and stability of system were examined. A new design to overcome polarization fading inside the fiber interferometer system based upon rotation of the input optical polarization is presented. The fiber is modeled as a birefringence cavity. Simulation based on fiber birefringence models is carried out; the optimum polarization rotation scheme has been verified, and the worst case fading has been determined. | en |
| dc.format.medium | electronic | en |
| dc.format.mimetype | application/pdf | |
| dc.language.iso | en_US | |
| dc.publisher | Texas A&M University | |
| dc.rights | This thesis was part of a retrospective digitization project authorized by the Texas A&M University Libraries in 2008. Copyright remains vested with the author(s). It is the user's responsibility to secure permission from the copyright holder(s) for re-use of the work beyond the provision of Fair Use. | en |
| dc.subject | electrical engineering. | en |
| dc.subject | Major electrical engineering. | en |
| dc.title | Signal processing for fiber optic acoustic sensor system | en |
| dc.type | Thesis | en |
| thesis.degree.discipline | electrical engineering | en |
| thesis.degree.name | M.S. | en |
| thesis.degree.level | Masters | en |
| dc.type.genre | thesis | en |
| dc.type.material | text | en |
| dc.format.digitalOrigin | reformatted digital | en |
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