We demonstrate simultaneous measurement of the real and the imaginary parts of third-order susceptibilities by use of a collinear pump–probe technique. This technique allows for good results and simple implementation. The signal analysis is based on the particular oscillatory signature versus the pump–probe delay allowed by the collinear configuration. Results are compared with interferometric measurements of a SF59 (Schott) glass sample.
© 1998 Optical Society of America
M. O. Martin, L. Canioni, and L. Sarger, "Measurements of complex third-order optical susceptibility in a collinear pump-probe experiment," Opt. Lett. 23, 1874-1876 (1998)