Coherent optical signal transferring on request by use of a BaTiO_3 crystal

Abstract

We demonstrate experimentally a setup with which a two-dimensional picture can be transmitted from one plane to another at a signal request of the latter plane and the original picture continues to propagate unhindered along its original direction to the next stage. The setup makes use of photorefractive four-wave mixing and the self-pumped phase conjugation for its operation. Some means for increasing the contrast of the final transmitted image have been discussed.

Photorefractive phase conjugators and their applications

“…Photorefractive conjugators find applications in various fields such as confocal microscopy [15][16][17][18] , optical feedback 19 , optical associative memory 32 and 2D pattern transferring [33][34] . We describe in the following two of our attempts in transferring 2D patterns between two locations.…”

Single-crystal barium titanate thin films by ion slicing

“…[1][2][3][4] These include, for example, a very high dielectric constant for capacitors, a large pyroelectric coefficient for pyroelectric detectors, and large nonlinear coefficients for applications in nonlinear optics. Many of these applications require a thinfilm form rather than a bulk crystal.…”