Patents by Inventor John W. Arkwright

John W. Arkwright 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).

  • Method of forming multiport optical fibre coupler and the coupler so formed
    Patent number: 5373572
    Abstract: A method of forming a multiport optical fiber coupler in which a bundle of seven optical fibers are located in close-packed hexagonal array within a capillary tube and twisted. An optical source is coupled to an outer fiber. A fused, tapered coupler is formed, the tapering being stopped when the minimum of optical power outputs is first maximized. This provides a 6.times.7 optical fiber coupler. Also disclosed is a 7.times.7 optical fiber coupler formed by fusing the coupler during formation sufficiently to provide that the maximum insertion loss through the device between any input and output is minimized.
    Type: Grant
    Filed: March 18, 1993
    Date of Patent: December 13, 1994
    Assignee: British Telecommunications public limited company
    Inventors: John W. Arkwright, David B. Mortimore