Patents Assigned to Plessey Research Caswell Limited
  • Optical fibre lattice signal processors
    Patent number: 4993797
    Abstract: The optical fibre lattice signal processor comprises at least two coupling devices through which two optical fibres pass in a manner permitting optical coupling therebetween. The optical coupling devices are arranged in parallel with respect to each other and each fibre experiences a 180.degree. turn between the couplers. Recursive and non-recursive arrangements are provided for, together with equal and arbitrary delays.
    Type: Grant
    Filed: June 6, 1990
    Date of Patent: February 19, 1991
    Assignee: Plessey Research Caswell Limited
    Inventors: Christopher J. Groves-Kirby, Douglas C. J. Reid