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Design and realization of long-period grating devices in conventional and high birefringence fibers and their novel applications as fiber-optic load sensors

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5 Author(s)
Zhang, L. ; Photon. Res. Group, Aston Univ., Birmingham, UK ; Liu, Y. ; Everall, L. ; Williams, J.A.R.
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We report the design and fabrication of long-period fiber gratings with single and cascaded structures in conventional and high birefringence (hi-bi) fibers using amplitude mask and point-by-point writing techniques. We also report a novel application of long-period gratings produced in nonhigh-birefringence fiber as fiber-optic load sensors exhibiting very high transverse strain sensitivity. Sensitivity some 800 times greater than previously reported fiber Bragg grating (FBG) sensors has been achieved

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Selected Topics in Quantum Electronics, IEEE Journal of  (Volume:5 ,  Issue: 5 )