USA As Represented by Secretary of the Navy

Arthur D Fisher

John N Lee

An associative processing module adapts in real time as it is exposed to associated information patterns, (u,v), so, at a later time presentation of one pattern, u, results in recall of the other, v.

Adaptive associative-processing optical computing architectures

An integrated optical signal processor device. The device includes a thin film of yttrium iron garnet ferrite material formed on a gadolinium gallium garnet substrate. A guided optical beam in a first polarization mode is directed through the thin film. A stripline antenna formed on the surface of the thin film is coupled to receive a microwave RF input signal. Under the influence of a bias magnetic field, the RF input signal excites a magnetostatic wave in the thin film. By means of Bragg diffraction, the magnetostatic wave diffracts the guided optical beam and thereby converts a portion of the beam into a second orthogonal polarization mode in response to the RF input signal. The guided optical beam is thereby modulated by the RF input signal. A preferred embodiment is disclosed which can be configured to form a spectrum analyzer, a time integrating correlator, and a space integrating convolver.

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Alexandria, VA, United States of America

Arthur D Fisher