Brambilla, G., Fotiadi, A.A., Slattery, S.A. and Nikogosyan, D.N.
Two-photon photochemical long-period grating fabrication in pure-fused-silica photonic crystal fiber
Optics Letters, 31, (18), . (doi:10.1364/OL.31.002675).
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We report what is to our knowledge the first photochemical fabrication of a long-period grating in a pure fused-silica photonic crystal fiber. The inscription technique is based on a two-photon absorption mechanism and does not require a specially designed photonic crystal fiber with a photosensitive Ge-doped core. The characteristic fluence value for the inscription is an order of magnitude less than that for a standard telecom fiber irradiated under similar conditions with the same grating parameters.
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