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Two-photon photochemical long-period grating fabrication in pure-fused-silica photonic crystal fiber

Gilberto Brambilla
Optoelectronics Research Centre, University of Southampton, UK

Andrei A. Fotiadi
Faculté Polytechnique de Mons, Service d’Electromagnetisme et de Télécommunications, 31, Boulevard Dolez, B-7000 Mons, Belgium

Stephen A. Slattery and David N. Nikogosyan
Physics Department, National University of Ireland, University College Cork, Cork, Ireland


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.

Optics Letters (2006) Vol.31(18) pp.2675-2677

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Copyright University of Southampton 2006