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  • Title: Band-rejection fiber filter and fiber sensor based on a Bragg fiber of transversal resonant structure.
    Author: Chen D, Yang TJ, Wu JJ, Shen L, Liao KL, He S.
    Journal: Opt Express; 2008 Oct 13; 16(21):16489-95. PubMed ID: 18852756.
    Abstract:
    We propose a novel band-rejection fiber filter based on a Bragg fiber of transversal resonant structure, which can also be used as a fiber sensor. Defect layers are introduced in the periodic high/low index structure in the cladding of the Bragg fiber. Coupling between the core mode and the defect mode results in large confinement loss for some resonant wavelengths inside the band gap of the Bragg fiber. A segment of the Bragg fiber of transversal resonant structure can be used as a band-rejection fiber filter, whose characteristics are mainly determined by the defect layer. The loss peak wavelength of the Bragg fiber is dependent on the refractive index and the thickness of the defect layer which indicates its applications of refractive index and strain sensing.
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