Abstract
Long period fiber grating transmission is the core guided mode coupling the transmission of the cladding mode, when the ambient temperature, strain, refractive index, bending changed, the resonance peaks of the long-period fiber grating are very sensitive to changes. Long period fiber grating as sensing elements has a strong advantage and a wide range of applications. In this paper, we use a method of electro-thermal melting tapering to draw some of the columns cone on the fiber to form a periodic structure, and then prepare a long period fiber grating. On this basis, we use super-continuum light source and the spectrometer with a range of 600-1700nm wavelength, and build a period fiber grating bending experiments systems.
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