Patents by Inventor Mari W. Maeda

Mari W. Maeda 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).

  • Polarization scrambler for polarization-sensitive optical devices
    Patent number: 5159481
    Abstract: A polarization scrambler comprising a multi-mode fiber spirally or preferably toroidally wrapped about a cylinder or toroid. The multi-mode fiber receives an optical signal from a long single-mode fiber. The optical output of the scrambler has an equal distribution of the two polarization states. Therefore, it can be passed through a polarization-sensitive filter or other optical device. The invention allows a low-cost receiver in a wavelength-division multiplexing communications system.
    Type: Grant
    Filed: September 14, 1990
    Date of Patent: October 27, 1992
    Assignee: Bell Communications Research, Inc.
    Inventor: Mari W. Maeda