Abstract
We measured the nonlinear optical susceptibility of some Ge-Ga-Sb-S chalcogenide glasses feasible for the fabrication of highly nonlinear photonic crystal fibers. The values of , , and glasses were found to be 3.5, 2.6, and (6.3, 4.6, and , where “esu” stands for electrostatic unit) at the fundamental wavelength , i.e., 227, 167, and 117 times higher than that of standard silica [ ()]. Their nonlinear refractive indices were then obtained as 1.8, 1.3, and (5.1, 3.7, and ). They are , 56, and 43% of () of the glass used as the chalcogenide glass reference.
© 2011 Optical Society of America
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