All Optical Switching Devices Based on Large Nonlinear Phase Shifts from Second Harmonic Generation

G. Assanto, G. I. Stegeman, M. Sheik-Bahae, and E. VanStryland

Appl. Phys. Lett. 62, 1323-1325 (1993)


We show that the large non-linear phase shift obtained from phase-mismatched second harmonic generation can be used to implement all-optical switching devices such as non-linear Mach-Zender interferometer and a non-linear directional coupler.