A Study on Q-Factor of CCBG Sensors by Coupled Mode Theory

Abstract

The innovative coaxial cable Bragg grating (CCBG) sensor not only achieves the attractive attributes of high resolution, remote operation and multiplexing capability, but also has the advantages of large strain capability and robustness to survive harsh conditions, suitable for structural health monitoring (SHM). The Q-factor of the resonances in CCBG is studied in this paper by coupled mode theory (CMT), to obtain a better understanding of the device physics. The relationships between geometrical parameters and the Q-factor are investigated quantitatively and closed-from expressions are obtained. Design guidelines are developed to improve the Q-factor and consequently improve the senor sensitivity and accuracy.

Meeting Name

SPIE Smart Structures + Nondestructive Evaluation and Health Monitoring (2012, Mar. 12-15, San Diego, CA)

Department(s)

Electrical and Computer Engineering

Keywords and Phrases

Coupled mode theory; Device physics; Geometrical parameters; High resolution; Large strains; Q-factors; Remote operation; Bragg gratings; Coaxial cables; Sensors; Q factor measurement; Coaxial cable Bragg grating (CCBG)

International Standard Book Number (ISBN)

978-0819490025

International Standard Serial Number (ISSN)

0277-786X

Document Type

Article - Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2012 SPIE, All rights reserved.

Publication Date

01 Mar 2012

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