An interferometric technique for measuring with picosecond resolution the time evolution of the real and imaginary components of optical nonlinearities in channel waveguides is described. Characteristics of the technique are illustrated with measurements of band-filling optical nonlinearities in CdSxSe1−x-doped glass channel waveguides.
© 1989 Optical Society of America
Original Manuscript: August 25, 1988
Manuscript Accepted: February 8, 1989
Published: May 15, 1989
N. Finlayson, M. O’Neill, T. J. Cullen, W. C. Banyai, C. T. Seaton, C. N. Ironside, and G. I. Stegeman, "Picosecond pump–probe interferometric measurement of optical nonlinearities in channel waveguides," Opt. Lett. 14, 532-534 (1989)