Bandwidth comparison of photonic crystal fibers and conventional   single-mode fibers
  We experimentally compare the optical bandwidth of a conventional single-mode fiber (SMF) with 3 different photonic crystal fibers (PCF) all optimized for visible applications. The spectral attenuation, single-turn bend loss, and mode-field diameters (MFD) are measured and the PCF is found to have a significantly larger bandwidth than the SMF for an identical MFD. It is shown how this advantage can be utilized for realizing a larger MFD for the PCF while maintaining a bending resistant fiber. 
M.D. Nielsen, J.R. Folkenberg, N.A. Mortensen, and A. Bjarklev