Patents by Inventor Cedric F. Lam

Cedric F. Lam 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).

  • System for flexible multiple broadcast service delivery over a WDM passive optical network based on RF block-conversion of RF service bands within wavelength bands
    Publication number: 20020033977
    Abstract: A system and method for simultaneous delivery of a plurality of independent blocks of 500 MHz digital broadcast television services, stacking a plurality of RF blocks on a plurality of spectrally sliced WDM optical bands.
    Type: Application
    Filed: July 30, 2001
    Publication date: March 21, 2002
    Inventors: Martin Birk, Patrick P. Iannone, Kenneth C. Reichmann, Nicholas J. Frigo, Cedric F. Lam
  • Multiple input waveguide grating router for broadcast and multicast services
    Publication number: 20020015204
    Abstract: An optical telecommunications network suitable for carrying broadcast and switched services. The network includes a wavelength division multiplexing (WDM) coupled to a waveguide grating router (WGR). In accordance with the invention, an adjacent input port is connected with the same optical content. Thus, its outputs are adjacent (or wrapped around). According, the optical power in each of the broadcast bands at the outputs remains the same but is reduced by a factor of two in power for each channel but occupying twice as many channels. This has the effect of increasing the SNR by a factor of two.
    Type: Application
    Filed: April 2, 2001
    Publication date: February 7, 2002
    Inventors: Nicholas J. Frigo, Patrick P. Iannone, Cedric F. Lam, Kenneth C. Reichmann