Design of photonic crystal fibers with ultra-low, ultra-flattened chromatic dispersion

摘要

We report the control of chromatic dispersion in index-guided photonic crystal fibers (PCFs) by GeO2-doping the central part of the silica core. Dispersion properties can be achieved by controlling the size and the GeO2-concentration of the doped region. PCFs with chromatic dispersion of about 6 × 10-2 ps/km/nm and dispersion slope of 0.003 to -0.0015 ps/km/nm2 in the C-band (1500-1600 nm) have been theoretically designed.