Refractive-index insensitive long-period fiber gratings point-by-point inscribed by CO[sub]2[/sub] laser for fiber sensors and lasers

Qun Han; Xinwei Lan; Jie Huang; Tao Wei; Zhan Gao; Hai Xiao

doi:10.1117/12.909105

19 March 2012 Refractive-index insensitive long-period fiber gratings point-by-point inscribed by CO₂ laser for fiber sensors and lasers

Qun Han, Xinwei Lan, Jie Huang, Tao Wei, Zhan Gao, Hai Xiao

Author Affiliations +

Proceedings Volume 8257, Optical Components and Materials IX; 825717 (2012) https://doi.org/10.1117/12.909105
Event: SPIE OPTO, 2012, San Francisco, California, United States

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.

Citation Download Citation

Qun Han, Xinwei Lan, Jie Huang, Tao Wei, Zhan Gao, and Hai Xiao "Refractive-index insensitive long-period fiber gratings point-by-point inscribed by CO₂ laser for fiber sensors and lasers", Proc. SPIE 8257, Optical Components and Materials IX, 825717 (19 March 2012); https://doi.org/10.1117/12.909105

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