ABSTRACT
An electrically controlled holographic switch is proposed as a building block for a free-space optical interconnection network. The switch is based on the voltage-controlled photorefractive effect in KLTN crystals at the paraelectric phase. It is built of electrically controlled Bragg gratings stored in the volume of the crystal. A compact switch that connects four high-speed fiber-optic communication channels with high efficiency is demonstrated experimentally. The switch performance is investigated and optimized. This switch is extremely attractive for cascaded switching arrays such as those found in multistage interconnect networks.
ABSTRACT
High holographic storage capacity of paraelectric K(1-x)Lix Ta(1-y) Nby O(3):Cu , V using the voltage-controlled photorefractive effect is experimentally demonstrated. Measurements of the M/# for various writing angles and reading fields are presented. In particular, it is shown that 128 angularly multiplexed holograms, written by two plane-wave beams separated by an angle of 8 degrees , yield an M/# of 20.
