Ultrabroadband, midinfrared supercontinuum generation in dispersion engineered As2 Se3-based chalcogenide photonic crystal fibers

Abstract

Small core As2 Se3-based photonic crystal fibers (PCFs) are accurately characterized for compact, high power, ultrabroadband, and coherent supercontinuum generation within fewmillimeters fiber length. Bandwidths of ∼5.3 μm, 5 μm, and 3.2 μm were calculated for hole-to-hole spacings Λ = 3.5 μm, 4.5 μm, and 5.5 μm, respectively.The spectral broadening in the chalcogenide PCF is mainly caused by self-phase modulation and Raman-induced soliton self-frequency shift.The results show that small core As2 Se3 PCFs are a promising candidate for mid-IR SCG up to ∼8 μm. Copyright © 2013 R. Cherif and M. Zghal.