Highly sensitive long-period fiber-grating strain sensor with low temperature sensitivity

A long-period fiber-grating sensor with a high strain sensitivity of -7.6 pm/microepsilon and a low temperature sensitivity of 3.91 pm/ degrees C is fabricated by use of focused CO(2) laser beam to carve periodic grooves on a large- mode-area photonic crystal fiber. Such a strain sensor can effectiv...

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Bibliographic Details
Published in:Optics letters 2006-12, Vol.31 (23), p.3414-3416
Main Authors: WANG, Yi-Ping, LIMIN XIAO, WANG, D. N, WEI JIN
Format: Article
Language:English
Subjects:
Applied sciences
Circuit properties
Electric, optical and optoelectronic circuits
Electronics
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
General equipment and techniques
Gratings
Instruments, apparatus, components and techniques common to several branches of physics and astronomy
Integrated optics. Optical fibers and wave guides
Optical and optoelectronic circuits
Optical elements, devices, and systems
Optics
Physics
Sensors (chemical, optical, electrical, movement, gas, etc.)
remote sensing
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Summary:A long-period fiber-grating sensor with a high strain sensitivity of -7.6 pm/microepsilon and a low temperature sensitivity of 3.91 pm/ degrees C is fabricated by use of focused CO(2) laser beam to carve periodic grooves on a large- mode-area photonic crystal fiber. Such a strain sensor can effectively reduce the cross-sensitivity between strain and temperature, and the temperature-induced strain error obtained is only 0.5 microepsilon/ degrees C without using temperature compensation.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.31.003414