Phase mask consisting of an array of multiple diffractive elements for simultaneous accurate fabrication of large arrays of optical couplers and method for making same

摘要

The present invention entails a phase mask (145) for producing a plurality of volume gratings (130) for use as optical couplers and method for creating the phase mask. The phase mask is produced by creating a plurality of volume gratings (120,125) having predetermined characteristics which allow the phase mask, when excited by a coherent light wave, to produce the plurality of volume gratings in a recording material (115).