Supercontinuum generation in an all-normal dispersion large core photonic crystal fiber infiltrated with carbon tetrachloride

All-normal dispersion supercontinuum generation (SG) in a large hollow core photonic crystal fiber (PCF) infiltrated with carbon tetrachloride is studied experimentally. The PCF is optimized to have a flat normal dispersion in a broadband range (0.8&x2013;1.7&x2005;&x00B5;m) varying from -150 to 0 ps/nm/km. The effective mode area at pump wavelength (&x03BB;&x003D;1030&x2005;nm) is as large as 42.2 &x00B5;m2 and readily meets the requirements for an all-fiber supercontinuum system. Infiltration of the core with carbon tetrachloride ensures a high nonlinear coefficient of the fiber equal to 22 1/W/km. Using an off-the-shelf 1030&x2005;nm fiber laser with 400 fs and 25 nJ input pulses, we generated an all-normal supercontinuum in the 850&x2013;1250&x2005;nm wavelength range.