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Opt Express. 2009 Aug 31;17(18):16238-43. doi: 10.1364/OE.17.016238.

Double photonic bandgap hollow-core photonic crystal fiber.

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  • 1Centre for Photonics and Photonic Materials, Department of Physics, University of Bath, Bath BA27AY, UK.


We report on the design, fabrication and characterization of hollow-core photonic crystal fiber with two robust bandgaps that bridge the benchmark laser wavelengths of 1064 nm and 1550 nm. The higher-order bandgap arises due to the extremely thin struts of the silica cladding and their fine-tuning relative to the apex size. The optimum strut thickness was found to be approximately one hundredth of the cladding pitch.

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