We demonstrate a method for determining the phase of the third-order susceptibility, χ(3), in the proximity of a Raman resonance. The measurements were based on the phenomenon of polarization beats, which was exploited in a time-delayed four-wave-mixing experiment with bichromatic beams. The phase dispersion of χ(3) was studied close to resonance with the 655.7-cm−1 vibrational mode of carbon disulfide.
© 1992 Optical Society of America
Original Manuscript: March 23, 1992
Published: August 1, 1992
H. Ma, A. S. L. Gomes, and Cid B. de Araújo, "Raman-assisted polarization beats in time-delayed four-wave mixing," Opt. Lett. 17, 1052-1054 (1992)