Bulg. J. Phys. vol.22 no.3-4 (1995), pp. 039-047



Analytical and Numerical Investigation of Opto-Optical Phase Modulation Based on Coupled Second Order Nonlinear Processes

S. Saltiel, K. Koynov, I. Buchvarov
Faculty of Physics, University of Sofia, 1164 Sofia, Bulgaria
Abstract. It is shown that the induced phase shift gained by any of the fundamental waves in such processes as type II second harmonic generation and sum frequency mixing depends on the intensity of both input waves. This provides a means of control of the phase shifts that is essential for construction of ultra fast all-optical switching gates. The induced phase shift is a result of simultaneous action of coupled second order processes and is described by effective cubic non-linearity.

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