Signal Processing Applications of Magneto-Optic Thin Films,
MAGNAVOX RESEARCH LABS TORRANCE CALIF
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During the past few years, radar communication and sonar system performance requirements have increased to a point where it is necessary to store and process a far greater number of electrical signals, in as near real time as possible, than ever before. Large time bandwidth products under a limited bandwidth constraint demand optical apertures which tend to dissipate the savings in cost and volume of optical processing over electronic processing with currently available light modulators. However, a unique solution to this problem has been demonstrated at Magnavox Research Laboratories based on the magneto-optic properties of ferromagnetic thin film materials. This approach constitutes a technical breakthrough, since it offers the advantage of packing several hundred thousand to several million bits to the square inch of modulator surface at rates varying from DC to several MHz. This allows large time bandwidth products, multiple channels, and small optical apertures, resulting in a small processing volume.
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