All-optical switching by using a nondegenerate cascaded second-order nonlinearity is described wherein a phase shift is induced at one frequency owing to the presence of intense light at a different frequency. A Mach-Zehnder waveguide device is proposed to take advantage of this process and has applications for all-optical switching and demultiplexing, potentially at power levels near 10 W by using quasi-phase matching in semiconductor waveguides.
© 1993 Optical Society of America
D. C. Hutchings, J. S. Aitchison, and C. N. Ironside, "All-optical switching based on nondegenerate phase shifts from a cascaded second-order nonlinearity," Opt. Lett. 18, 793-795 (1993)