Abstract
A simple fiber-optic sensor capable of discrimination between temperature and strain is proposed and experimentally demonstrated. The sensor head is formed by cascading two sections of single-mode thin-core diameter fibers (TCFs) that act as two different inter-modal interferometers (IMIs). Due to the different sensitivity responses of the two IMIs to strain and temperature, it is possible to discriminate temperature and strain by monitoring the resonant wavelength shifts. The experimental results indicate that the measured strain and temperature resolutions are 37.41 με and 0.732 °C within a strain range of 0–1333.3 με and a temperature range from 26.9 °C to 61.7 °C. The sensing sensitivities of strain and temperature are and , respectively. The proposed sensor features the advantages of easy fabrication, low cost and high sensitivity, and it exhibits great potential in dual-parameter measurement.
©2012 Optical Society of America
Full Article | PDF ArticleMore Like This
Bo Dong, Jianzhong Hao, Chin-yi Liaw, Bo Lin, and Swee Chuan Tjin
Appl. Opt. 49(32) 6232-6235 (2010)
Li Wang, Weigang Zhang, Biao Wang, Lei Chen, Zhiyong Bai, Shecheng Gao, Jieliang Li, Yongji Liu, Liyu Zhang, Quan Zhou, and Tieyi Yan
Appl. Opt. 53(30) 7045-7049 (2014)
Da-Peng Zhou, Li Wei, Wing-Ki Liu, Yu Liu, and John W. Y. Lit
Appl. Opt. 47(10) 1668-1672 (2008)