Patents by Inventor Lip Sun How Kee Chun

Lip Sun How Kee Chun 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-insensitive variable optical attenuator
    Publication number: 20030039461
    Abstract: A polarization-insensitive broad-band variable optical attenuator (10) includes a first Mach-Zehnder interferometer (MZI) stage (12) having a polarization dependence loss of a first polarity, and a second Mach-Zehnder interferometer (MZI) stage (14) coupled in series, or cascaded, to the first Mach-Zehnder stage (12) and having a polarization dependence loss of an opposite polarity to the first polarity.
    Type: Application
    Filed: July 19, 2002
    Publication date: February 27, 2003
    Inventors: Lip Sun How Kee Chun, Barthelemy Fondeur