Nonlinear photonic crystal fibres: pushing the zero-dispersion toward the visible

Details Nonlinear photonic crystal fibres: pushing the zero-dispersion toward the visible Nonlinear photonic crystal fibres: pushing the zero-dispersion toward the visible

2006-08-14

arxiv.org/abs/physics/0608142v1

New J. Phys. 8, 207 (2006)

Physics

Optics

Scientific paper

10.1088/1367-2630/8/9/207

The strong waveguide dispersion in photonic crystal fibres provides unique opportunities for nonlinear optics with a zero-dispersion wavelength $\lambda_0$ far below the limit of ~1.3 micron set by the material dispersion of silica. By tuning the air-hole diameter d, the pitch Lambda, and the number of rings of air holes N, the strong waveguide dispersion can in principle be used to extend lambda_0 well into the visible, albeit to some extend at the cost of multimode operation. We study in detail the interplay of the zero-dispersion wavelength, the cut-off wavelength lambda_c, and the leakage loss in the parameter space spanned by d, Lambda, and N. As a particular result we identify values of d (~500 nm) and Lambda (~700 nm) which facilitate the shortest possible zero-dispersion wavelength (~700 nm) while the fibre is still single-mode for longer wavelengths.

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