A study on Q-factor of CCBG sensors by coupled mode theory

Songping Wu; Tao Wei; Jie Huang; Hai Xiao; Jun Fan

doi:10.1117/12.915755

6 April 2012 A study on Q-factor of CCBG sensors by coupled mode theory

Songping Wu, Tao Wei, Jie Huang, Hai Xiao, Jun Fan

Proceedings Volume 8345, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2012; 834549 (2012) https://doi.org/10.1117/12.915755
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2012, San Diego, California, United States

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.

Citation Download Citation

Songping Wu, Tao Wei, Jie Huang, Hai Xiao, and Jun Fan "A study on Q-factor of CCBG sensors by coupled mode theory", Proc. SPIE 8345, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2012, 834549 (6 April 2012); https://doi.org/10.1117/12.915755

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