Patents by Inventor Desai Narayana Rao

Desai Narayana Rao has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • All-optical devices
    Patent number: 5757525
    Abstract: All-optical devices, e.g., optical switches and modulators, and logic gates such as optical AND and OR gates, that include photochromic materials having first and second stable states, such as bacteriorhodopsin, organic fulgides, azo and fluorescent dyes, phycobiliproteins, rhodopsins, and their analogs, irradiated in a four-wave mixing geometry, are described. These devices can be used in a wide variety of systems, such as, e.g., optical signal processors and optical computers.
    Type: Grant
    Filed: June 5, 1996
    Date of Patent: May 26, 1998
    Assignee: University of Massachusetts
    Inventors: Devulapalli V. G. L. N. Rao, Francisco J. Aranda, Desai Narayana Rao, Joseph A. Akkara, Joseph F. Roach, Zhongping Chen