Patents by Inventor Sian Chong LEE

Sian Chong LEE 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).

  • Publication number: 20190074908
    Abstract: A coherent optical receiver having an analog electrical circuit connected to combine the outputs of multiple photodetectors to generate an electrical output signal from which the data encoded in a received modulated optical signal can be recovered in a robust and straightforward manner. In an example embodiment, the analog electrical circuit includes one or more transimpedance amplifiers connected between the photodetectors and the receiver's output port. The coherent optical receiver may include a dual-polarization optical hybrid coupled to eight photodiodes to enable polarization-insensitive detection of the received modulated optical signal. The signal processing implemented in the analog electrical circuit advantageously enables the use of relatively inexpensive local-oscillator sources that may have relaxed specifications with respect to linewidth and wavelength stability.
    Type: Application
    Filed: September 6, 2017
    Publication date: March 7, 2019
    Applicant: Nokia Solutions and Networks OY
    Inventors: Sian Chong Lee, Vincent Houtsma, Doutje van Veen, Chen Zhu, Noriaki Kaneda, Michael Eggleston
  • Publication number: 20140369392
    Abstract: In one example embodiment, a communication system includes a remote unit configured to convert a plurality of signals, received at the remote unit from a plurality of end devices, into a plurality of first digital signals regardless of a bandwidth occupied by any of the plurality of signals. The communication system further includes a central unit configured to generate a plurality of second digital signals by processing the plurality of first digital signals received from the remote unit and transmit the plurality of second digital signals back to the remote unit, to be transmitted to the plurality of end devices.
    Type: Application
    Filed: June 13, 2013
    Publication date: December 18, 2014
    Inventors: Sian Chong LEE, Noriaki KANEDA