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Opt Express. 2008 Dec 8;16(25):20626-36.

Square-lattice large-pitch hollow-core photonic crystal fiber.

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  • 1Centre for Photonics & Photonic Materials, Department of Physics, University of Bath, Bath, BA2 7AY, UK.


We report on the design, fabrication and characterization of silica square-lattice hollow core photonic crystal fibers optimized for low loss guidance over an extended frequency range in the mid-IR region of the optical spectrum. The fiber's linear optical properties include an ultra-low group velocity dispersion and a polarization cross-coupling as low as -13.4 dB over 10 m of fiber.

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