confinement loss in hexagonal photonic crystal fibers (H-PCFs). It is demonstrated that it is
possible to obtain very low chromatic dispersion of 0±0: 38 ps/(nm· km) in the wavelength
range of 1.41 to 1.66 μm and confinement loss of less than 0.0001 dB/km from a six ring
modified H-PCF (MH-PCF). The higher order dispersion at 1.55 μm is about− 0.001 ps/(nm 2-
km).