The nonlinear refractive index n2 of CS2 at 10.6 µm, the value of which is a subject of a recent controversy, is measured by an external self-focusing method. We found that n2 = (2.1 ± 0.7) × 10-11 esu, similar to the accepted value of n2 in the visible. Self-bending of spatially asymmetric CO2 laser beam in CS2 due to an ultrafast Kerr effect is observed, and the deduced value of n2 is in agreement with our results.
© 1988 Optical Society of America
I. Golub, Y. Beaudoin, and S. L. Chin, "Nonlinear refraction in CS2 at 10.6 µm," Opt. Lett. 13, 488-490 (1988)