We report measurements of first- and second-order dispersion and wavelength-dependent beam divergence in single-mode Photonic Crystal Fibre. These results show good agreement with the published model of wave propagation in this novel waveguiding medium.
M. J. Gander, M. J. Gander,
"Characterisation of photonic crystal fibre", Proc. SPIE 3746, 13th International Conference on Optical Fiber Sensors, 37461O (1 September 1999); doi: 10.1117/12.2302050; https://doi.org/10.1117/12.2302050