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Cladding mode coupling suppression in hole‐assisted fiber BRAGG gratings
Author(s) -
Han YoungGeun,
Lee Young Jun,
Kim Gil Hwan,
Cho Hung Su,
Lee Ju Han,
Lee Sang Bae
Publication year - 2007
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.22050
Subject(s) - cladding (metalworking) , cladding mode , materials science , plastic clad silica fiber , all silica fiber , optics , wavelength , mode coupling , long period fiber grating , coupling loss , hard clad silica optical fiber , optical fiber , optoelectronics , composite material , plastic optical fiber , fiber , polarization maintaining optical fiber , fiber optic sensor , physics
We experimentally investigate the cladding mode coupling loss of fiber Bragg gratings written in hole‐assisted fibers. The cladding mode coupling loss is remarkably suppressed due to air holes inside of the silica cladding. The reduction of cladding mode coupling loss of less than ∼0.33 dB is obtained. The wavelengths spacing between the main peak due to the core mode coupling and the first side peak due to the first order cladding mode coupling is changed by the increase of the air holes size since the effective index of cladding mode is reduced by the air hole size within the fiber. The variation of the wavelength spacing is ranged from 2.0 to 2.28 nm. © 2006 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 74–74, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22050