Highly sensitive temperature-independent strain sensor based on a long-period fiber grating with a CO2-laser engraved rotary structure

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review

21 Scopus Citations
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Author(s)

Detail(s)

Original languageEnglish
Pages (from-to)543-545
Journal / PublicationIEEE Photonics Technology Letters
Volume21
Issue number8
Publication statusPublished - 15 Apr 2009
Externally publishedYes

Abstract

We present a highly sensitive strain sensor based on the use of a long-period fiber grating (LPFG) with rotary grooves carved by high-frequency CO2-laser pulses. We observe that, when the rotation rate of the grooves is sufficiently large, the resonance peak of the grating splits into two with a wavelength separation that changes sensitively with the strain applied along the grating and remains practically constant with a change in the ambient temperature. By measuring the wavelength separation of the two resonance peaks, we obtain a strain sensitivity of ∼0.1067±0.0075 nm/με without any temperature compensation, which is larger than that of a conventional LPFG by almost two orders of magnitude. © 2009 IEEE.

Research Area(s)

  • CO2 lasers, Long-period fiber gratings (LPFGs), Optical fiber sensors, Strain sensor, Temperature-independent

Citation Format(s)

Highly sensitive temperature-independent strain sensor based on a long-period fiber grating with a CO2-laser engraved rotary structure. / Zhu, Tao; Rao, Yun-Jiang; Song, Yun; Chiang, Kin S.; Liu, Min.

In: IEEE Photonics Technology Letters, Vol. 21, No. 8, 15.04.2009, p. 543-545.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review