DIGITAL RECORDING USING HOLOGRAM ARRAYS: development of the transducers for an experimental l00Mbit/s recorder

摘要

Three special transducers for use with an experimental holographic recorder have been partly developed. They are a hologram page-composer with 50 ports, a solid-state digital light-deflector and a photodetector array for intercepting 100 light-beams.nThe page-composer is based on an electro-optic ceramic material, PLZT, in the form of a large slice placed between two matched arrays of lenses. This device produces 50 collimated digit-beams each of which can be modulated independently by external electronic switches. Generally, performance was good but same problems remain in the fabrication process and in the need to improve the dissipation of the heat generated in the PLZT.