Patents by Inventor Anthony M. Thorley

Anthony M. Thorley 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).

  • Optical fiber monitoring by detection of polarization variations
    Patent number: 5258615
    Abstract: The invention concerns apparatus for monitoring optical fibers by detecting variations in the polarization of light being transmitted through the fibers. In one embodiment the optical fibre carries non-coherent light and the incoming light is split by a passive splitter (2) connected to a polarization beam splitter (5). Variations in the output of this polarization beam splitter are detected, amplified and filtered so that they can be compared with a preset reference voltage. A counter (12) is used to detect variations. Another embodiment relates to the detection of polarization variations in coherent systems.
    Type: Grant
    Filed: September 3, 1992
    Date of Patent: November 2, 1993
    Assignee: GPT Limited
    Inventor: Anthony M. Thorley