Grating resonances in air-silica microstructured optical fibers

We report what is believed to be the first demonstration of optical fiber gratings written in photonic crystal fibers. The fiber consists of a germanium-doped photosensitive core surrounded by a hexagonal periodic air-hole lattice in a silica matrix. The spectra of these gratings allow for a detaile...

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Bibliographic Details
Published inOptics letters Vol. 24; no. 21; p. 1460
Main Authors Eggleton, B J, Westbrook, P S, Windeler, R S, Spälter, S, Strasser, T A
Format Journal Article
LanguageEnglish
Published United States 01.11.1999
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Summary:We report what is believed to be the first demonstration of optical fiber gratings written in photonic crystal fibers. The fiber consists of a germanium-doped photosensitive core surrounded by a hexagonal periodic air-hole lattice in a silica matrix. The spectra of these gratings allow for a detailed characterization of the fiber. In particular, the gratings facilitate coupling to higher-order leaky modes. We show that the spatial distribution and the effective index of these modes are determined largely by the design of the lattice and that the grating spectra are unaffected by the refractive index surrounding the fiber. We describe these measurements and corresponding simulations and discuss their implications for the understanding of such air-hole structures.
ISSN:0146-9592
1539-4794
DOI:10.1364/ol.24.001460