Processing speed increased substantially. Improved optical interferometric image-processing scheme based on four-wave mixing via photorefractive effect in GaAs or InP. Gives rise to index-of-refraction gratings acting as phase-conjugate mirrors: interactions among four input beams generate wave-front-reversed replicas of two of these beams. Each phase-conjugate beam travels precisely back along path of corresponding input beam, regardless of angle of incidence. Any distortions introduced into input beam during forward propagation removed from phase-conjugate beam during backward propagation.


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    Title :

    Improved Interferometric Photorefractive Optical Processor


    Contributors:

    Published in:

    Publication date :

    1991-10-01



    Type of media :

    Miscellaneous


    Type of material :

    No indication


    Language :

    English




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