Code for Group-velocity symmetry in photonic crystal fibre for ultra-tunable quantum frequency conversion

This data set includes the MATLAB scripts used to generate the plots in each figure of this paper. Specifically, "PCF_BSFWM_Broadbandfinder032020.m" was used to create the plot in fig.2 measuring the broadband conversion of PCF from the sellmier equations for refractive index in PCF; "PCF_BSFWM_Broadbandphasematching0420.m" was used to find specific examples of broadband PCF and "NLSE_bsfwm_in_pcf.m" was used in a similar way to look at individual fibre designs. Also included are the functions referenced in each script. Results are derived from first principles so no input data is needed.