Riishede, Jesper3; Lægsgaard, Jesper2; Broeng, Jes4; Bjarklev, Anders Overgaard5
1 Glass Components and Materials, Department of Photonics Engineering, Technical University of Denmark2 Department of Photonics Engineering, Technical University of Denmark3 Department of Mechanical Engineering, Technical University of Denmark4 Crystal Fibre A/S5 Rector’s office, Administration, Technical University of Denmark
A theoretical analysis of a photonic bandgap fibre, consisting of a pure silica background with a triangular lattice of Ge-doped high-index rods, is presented. This novel fibre design guides a single, well-confined mode in a core region made from undoped silica. The fibre is found to have positive waveguide dispersion, which may be used to shift the zero-dispersion wavelength down to 730 nm, while maintaining an effective mode area of 17 $mu@-m$+2$/. This is an order of magnitude larger than what may be achieved in highly non-linear index-guiding microstructured fibres with comparable zero-dispersion wavelength.
Journal of Optics a, 2004, Vol 6, Issue 7, p. 667-670