31 August 2000 Highly sensitive temperature sensor using long-period fiber grating
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Proceedings Volume 4074, Applications of Optical Fiber Sensors; (2000) https://doi.org/10.1117/12.397888
Event: Symposium on Applied Photonics, 2000, Glasgow, United Kingdom
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.
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Shun-Yee Liu, Shun-Yee Liu, Hwa-Yaw Tam, Hwa-Yaw Tam, M. Suleyman Demokan, M. Suleyman Demokan, } "Highly sensitive temperature sensor using long-period fiber grating", Proc. SPIE 4074, Applications of Optical Fiber Sensors, (31 August 2000); doi: 10.1117/12.397888; https://doi.org/10.1117/12.397888

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