Circular Lattice Photonic Crystal Fiber (CL-PCF) is proposed in the aim to achieve nearly zero ultra flattened chromatic dispersion for supercontinuum generation.

The parameters of the proposed design is optimized by using a finite-difference in frequency-domain (FDFD) method combined with the perfectly matched layer (PML) boundary condition.

Numerical results show that an ultra flattened chromatic dispersion as small as ±0.66 ps/nm km is obtained over a broad band of 400 nm covering the E, S, C, L and U bands.

400 nm bandwidth infrared supercontinuum generation is demonstrated in a 25 cm length of the proposed CL-PCF by using an intense 0.1 ps width Gaussian pulse.