1 July 2005 Temperature-independent measurement of displacement based on the chirp tuning of a fiber grating
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Optical Engineering, 44(7), 074401 (2005). doi:10.1117/1.1948382
Abstract
We report the temperature-independent measurement of displacement based on the chirp tuning of a fiber grating and a specially designed cantilever. The 3-dB bandwidth of the chirped grating changes linearly with displacement and is independent of the temperature. The displacement can be monitored directly by measuring the reflected light from the chirp grating. A linear displacement response of 37.063 mV/mm was obtained. The fluctuation of the output signal is less than 5% for a temperature range from 20 to 60°C without any temperature compensation technique. The sensor has potentially low cost due to its simple structure.
Xiufeng Yang, Xin Yong Dong, Chunliu Zhao, JunHong Ng, Qizhen Peng, Xiaoqun Zhou, Chao Lu, "Temperature-independent measurement of displacement based on the chirp tuning of a fiber grating," Optical Engineering 44(7), 074401 (1 July 2005). http://dx.doi.org/10.1117/1.1948382
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KEYWORDS
Sensors

Fiber Bragg gratings

Temperature metrology

Reflectivity

Optical design

Optical engineering

Fiber optics sensors

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