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Proceedings Paper

Highly sensitive temperature sensor using long-period fiber grating
Author(s): Shun-Yee Liu; Hwa-Yaw Tam; M. Suleyman Demokan
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Paper Abstract

In this paper, we report a novel technique to increase the temperature sensitivity of a LPG by nearly two hundred times by exploiting the extremely large dependence of the spectral shift of an LPG on its ambient refractive index. The temperature coefficient of the packaged LPG sensor was measured to be 8.8 nm/ degree(s)C from 16 degree(s)C to 20 degree(s)C which is about 180 times higher than an unpackaged LPG. Correspondingly, it is about 800 times more sensitive than a fiber Bragg grating sensor which has a typical temperature coefficient of 0.011 nm/ degree(s)C.

Paper Details

Date Published: 31 August 2000
PDF: 8 pages
Proc. SPIE 4074, Applications of Optical Fiber Sensors, (31 August 2000); doi: 10.1117/12.397888
Show Author Affiliations
Shun-Yee Liu, Hong Kong Polytechnic Univ. (China)
Hwa-Yaw Tam, Hong Kong Polytechnic Univ. (China)
M. Suleyman Demokan, Hong Kong Polytechnic Univ. (Hong Kong)


Published in SPIE Proceedings Vol. 4074:
Applications of Optical Fiber Sensors
Alan J. Rogers, Editor(s)

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