We report on interferometric measurements of nonlinear phase shifts of the fundamental mode that are due to cascading in a second-harmonic-generation experiment in lithium niobate channel waveguides. With temperature tuning of the wave-vector mismatch the nonlinear phase shifts were adjustable in sign and magnitude. Varying the wave-vector matching condition along the waveguide leads to large phase shifts with low depletion and dispersion of the fundamental.
© 1994 Optical Society of America
Original Manuscript: June 21, 1994
Published: December 1, 1994
R. Schiek, H. Seibert, W. Sohler, M. L. Sundheimer, D. Y. Kim, Y. Baek, and G. I. Stegeman, "Direct measurement of cascaded nonlinearity in lithium niobate channel waveguides," Opt. Lett. 19, 1949-1951 (1994)