US Patent 4,811,258
United States Patent and Trademark Office
University of Iowa Research Foundation (Iowa City, IA, US)
A reversible, all optical implementation of an interaction gate. One embodiment of the interaction gate is a dual-beam version of an optical nonlinear interface. A second embodiment is a dual-beam Fabry-Perot (F-P) switch. The device is a universal computation building block from which arbitrary computing circuits can be constructed.
Andersen, David R. and Cuykendall, Robert R. Digital optical interaction gate. US Patent 4,811,258 filed March 06, 1987 and issued March 07, 1989. https://ir.uiowa.edu/patents/65