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Proceedings Paper

Tilted fiber Bragg grating-based accelerometer
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Paper Abstract

A power-referenced fiber-optic accelerometer is proposed by using a weakly tilted fiber Bragg grating (TFBG) combined with a lateral-misaligned splice structure. The recoupling of lower-order cladding modes (ghost modes), excited by the TFBG, to the fiber core via a slightly lateral-offset slice is sensitive to vibration and can be unambiguously determined by monitoring the power change in reflection, avoiding complex wavelength interrogation. However, the Bragg resonance is virtually unaffected by fiber bending and it can be used as a power reference to cancel out any light source fluctuations. Combining with a polymer tube package, the novel sensing configuration presents a linear and reproducible response for acceleration measurement.

Paper Details

Date Published: 5 October 2009
PDF: 4 pages
Proc. SPIE 7503, 20th International Conference on Optical Fibre Sensors, 750335 (5 October 2009); doi: 10.1117/12.834936
Show Author Affiliations
Tuan Guo, The Hong Kong Polytechnic Univ. (Hong Kong, China)
Liyang Shao, The Hong Kong Polytechnic Univ. (Hong Kong, China)
Hoyin Au, The Hong Kong Polytechnic Univ. (Hong Kong, China)
Hwa-yaw Tam, The Hong Kong Polytechnic Univ. (Hong Kong, China)
Jacques Albert, Carleton Univ. (Canada)


Published in SPIE Proceedings Vol. 7503:
20th International Conference on Optical Fibre Sensors

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