Confinement Losses in Honeycomb Fibers

The confinement losses in honeycomb photonic bandgap fibers are numerically investigated by means of the finite element method. Honeycomb fibers with both an extra hole and a low refractive index region as defects are considered. It is shown that by means of a proper design, confinement losses lower than 0.1 dB/km at /spl lambda/=1.55 μm can be obtained with four hole rings.