Demonstration of fast switching of photorefractive four-wave mixing via Pockels effect

Fast switching of light propagation in a photorefractive crystal via Pockels effect

“…The slow response time greatly limits its applications, particularly in fast optical switching. Recently,we have proposed and experimentally demonstrated that this problem of slow speed of switching can be overcome by applying an electric field to control the efficiency of photorefractive four-wave mixing [6,7].In this paper, we experimentally study the fast switching of a single beam propagation through a cerium-doped BaTiO 3 photorefractive crystal as well as the consequent phase conjugate generation. The switching is achieved by applying an external voltage.…”

“…Under the field the refractive indices for the incident and the fanning beams change, due to the Pockels effect, as follows [6,7] …”

“…we have proposed and experimentally demonstrated that this problem of slow speed of switching can be overcome by applying an electric field to control the efficiency of photorefractive four-wave mixing [6,7].…”