Circular Lattice Photonic Crystal Fiber for Mid-IR Supercontinuum Generation

This letter introduces specific design features of a proposed chalcogenide photonic crystal fiber for ultra-wideband supercontinuum generation in the mid-infrared region. The fiber is optimized to include a circular photonic crystal lattice having tremendous potential in the fields of spectroscopy, food quality control, pulse compression, gas sensing, and various nonlinear applications. By tailoring the zero-dispersion wavelength up to 2 and 2.5 mu m, we have reached supercontinuum generation in the anomalous dispersion regime with the entire design hinging upon fibers based on two types of chalcogenide glass-arsenic-selenide and arsenic-sulfide, where supercontinuum broadening from 1.2 to 9.3 mu m is made possible.