Doctoral Dissertations

Yinan Zhang

Abstract

"Pressure and acoustic measurements are required in many industrial applications such as down-hole oil well monitoring, structural heath monitoring, engine monitoring, study of aerodynamics, etc. Conventional sensors are difficult to apply due to the high temperature, electromagnetic-interference noise and limited space in such environments. Fiber optic sensors have been developed since the last century and have proved themselves good candidates in such harsh environment. This dissertation aims to design, develop and demonstrate miniaturized fiber pressure/acoustic sensors for harsh environment applications through femtosecond laser fabrication. Working towards this objective, the dissertation explored two types of fiber inline microsensors fabricated by femtosecond laser: an extrinsic Fabry-Perot interferometric (EFPI) sensor with silica diaphragm for pressure/acoustic sensing, and an intrinisic Fabry-Perot interferometer (IFPI) for temperature sensing. The scope of the dissertation work consists of device design, device modeling/simulation, laser fabrication system setups, signal processing method development and sensor performance evaluation and demonstration. This research work provides theoretical and experimental evidences that the femtosecond laser fabrication technique is a valid tool to fabricate miniaturized fiber optic pressure and temperature sensors which possess advantages over currently developed sensors"--Abstract, page iii.

Advisor(s)

Xiao, Hai, Dr.

Committee Member(s)

Fan, Jun, 1971-
Tsai, Hai-Lung
Kim, Chang-Soo
Moss, Randy Hays, 1953-

Department(s)

Electrical and Computer Engineering

Degree Name

Ph. D. in Electrical Engineering

Sponsor(s)

National Energy Technology Laboratory (U.S.)

Publisher

Missouri University of Science and Technology

Publication Date

Fall 2013

Pagination

x, 81 pages

Note about bibliography

Includes bibliographical references (pages 74-80).

Rights

© 2013 Yinan Zhang, All rights reserved.

Document Type

Dissertation - Open Access

File Type

text

Language

English

Subject Headings

Optical fiber detectors -- DesignFabry-Perot interferometersFemtosecond lasersPressure -- MeasurementAcoustic emission -- Measurement

Thesis Number

T 10429

Electronic OCLC #

870653036

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