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Optical Engineering

Temperature-independent measurement of displacement based on the chirp tuning of a fiber grating
Author(s): Xiufeng Yang; Xin Yong Dong; Chunliu Zhao; JunHong Ng; Qizhen Peng; Xiaoqun Zhou; Chao Lu
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Paper 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.

Paper Details

Date Published: 1 July 2005
PDF: 4 pages
Opt. Eng. 44(7) 074401 doi: 10.1117/1.1948382
Published in: Optical Engineering Volume 44, Issue 7
Show Author Affiliations
Xiufeng Yang, Institute for Infocomm Research (Singapore)
Xin Yong Dong, Nanyang Technological Univ. (Singapore)
Chunliu Zhao, Institute for Infocomm Research (Singapore)
JunHong Ng, Institute for Infocomm Research (Singapore)
Qizhen Peng, Institute for Infocomm Research (Singapore)
Xiaoqun Zhou, Institute for Infocomm Research (Singapore)
Chao Lu, Institute for Infocomm Research (Singapore)

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