Coherent broadband mid-infrared supercontinuum generation in As2Se3 photonic crystal fiber

The generation of fully coherent broadband mid-infrared (MIR) supercontinuum (SC) from 2.3 um to 8.3 um is demonstrated by using a 4.1 um pump and an As2Se3 photonic crystal fiber (PCF).By introducing the random quantum noise and the power instability on the input pulse and by numerically implementing the Young,s double slits experiment, we examine the coherence properties across the SC spectrum. It is found that the coherence of this MIR SC source depends strongly on the input pulse duration, the peak power, the power stability, and the zero-dispersion wavelength (ZDW) of the As2Se3 PCF.The optimal conditions for the MIR SC with a maximal coherent bandwidth are identified.