Abstract
In this paper we report on fabrication and characterization of a large core hollow core photonic crystal fiber. The fiber is designed and modeled using a finite element method taking into account material dispersion of the glass. A sodium-calcium silicate glass SK222 is used for photonic crystal fiber development. The hollow core is made by omitting 37 central capillaries and it has the diameter of 26 mm. The hexagonal photonic cladding is composed of 12 rings with the lattice pitch of 2.8 μm with the filling factor of 0.86. We have measured a large band gap in the range 560÷670nm with a center wavelength at 630 nm for the measured fiber.
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