Optical waveguides – Directional optical modulation within an optical waveguide – Acousto-optic
Patent
1991-03-01
1992-11-17
Lee, John D.
Optical waveguides
Directional optical modulation within an optical waveguide
Acousto-optic
385 17, 385 14, 385 24, G02B 610
Patent
active
051651041
ABSTRACT:
An optical interconnecting device and method are disclosed for selectively directing signals from an array of optical inputs to an array of optical outputs through an optical medium. The input signals are angularly multiplexed and redirected by dynamic gratings of the appropriate spatial, or grating, frequency. Spatially periodic optical index perturbations propragated in the medium are utilized to achieve the dynamic gratings. The angles at which light is input to the gratings (input angles) and angles at which light is collected from the gratings (output angles) are selected to allow each grating frequency to connect signals at only one input angle to one output angle and thus only one optical output. The number of resolvable gratings required is the product of the number of inputs and the number of output. For the interconnection of an equal number of inputs and outputs connected in a one to one permutation, only a number of gratings equal to the number of inputs need be present simultaneously.
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Colin K. Campbell, "Applications of Surface Acoustic and Shallow Bulk Acoustic Wave Devices", Proceedings of the IEEE, vol. 77, No. 10, Oct. 1989.
Barns Stephen W.
Burdick Harold A.
Lee John D.
Optivideo Corporation
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