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Proceedings Paper

Refractive-index insensitive long-period fiber gratings point-by-point inscribed by CO2 laser for fiber sensors and lasers
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Paper Abstract

This paper reports a long-period fiber gratings(LPFG) fabricated on a double-clad fiber (DCF) by the CO2 laser point-by-point technique. The LPFG is tested by measuring temperature and refractive index (RI) of different liquids. The results show that the LPFG inscribed on the DCF has no measurable sensitivity to external RI but has a high sensitivity for temperature. The measured temperature sensitivity is ~0.11 nm/oC, about 10 times higher than that of conventional FBGs. Such LPFGs can be used as a modulator in fiber lasers or temperature/strain sensors in applications where the surrounding RI is prone to variation, such as simultaneous measurement of the temperature and RI of chemical reactions.

Paper Details

Date Published: 20 March 2012
PDF: 6 pages
Proc. SPIE 8257, Optical Components and Materials IX, 825717 (20 March 2012); doi: 10.1117/12.909105
Show Author Affiliations
Qun Han, Missouri Univ. of Science and Technology (United States)
Tianjin Univ. (China)
Xinwei Lan, Missouri Univ. of Science and Technology (United States)
Jie Huang, Missouri Univ. of Science and Technology (United States)
Tao Wei, Missouri Univ. of Science and Technology (United States)
Zhan Gao, Missouri Univ. of Science and Technology (United States)
Hai Xiao, Missouri Univ. of Science and Technology (United States)


Published in SPIE Proceedings Vol. 8257:
Optical Components and Materials IX
Shibin Jiang; Michel J. F. Digonnet; J. Christopher Dries, Editor(s)

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