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A Highly Sensitive Sensor Based on a Novel Helical Long Period Fiber Grating Written in the Rotated Fiber by CO2 laser

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A new type helical long-period fiber grating (HLPFG) was fabricated and its sensing characteristics were investigated experimentally. Compared with conventional long-period gratings with the same period, the HLPFGs had much higher torsion and strain sensitivity.

© 2015 Optical Society of America

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