Abstract
In this work, we have proposed a sensor for strain measurement in high-temperature environments up to 800°C by employing two regenerated fiber Bragg gratings. Two seed gratings (SGs) are inscribed in high Ge-doped and B/Ge-codoped fibers, respectively, which possess different temperature sensitivities. To achieve two gratings with different strain sensitivities, one of the gratings is chemically etched to reduce the fiber diameter for strain sensitivity enhancement. A thermal annealing process is carried out to activate the grating regeneration in the SGs. The temperature and strain calibration experiments indicate that the proposed structure has uncertainty values of 23.42 με and 5.83°C over the ranges of 0–1000 με and 20°C–800°C, respectively.
© 2017 Optical Society of America
Full Article | PDF ArticleMore Like This
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)
Lingya Lv, Sumei Wang, Lan Jiang, Fei Zhang, Zhitao Cao, Peng Wang, Yi Jiang, and Yongfeng Lu
Appl. Opt. 54(36) 10678-10683 (2015)
Bo Dong, Jianzhong Hao, Chin-yi Liaw, Bo Lin, and Swee Chuan Tjin
Appl. Opt. 49(32) 6232-6235 (2010)