Patents by Inventor Jon Tsou

Jon Tsou 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).

  • Method and system for controlling Raman gain flatness sensitivity to pump laser wavelength variation
    Patent number: 6525870
    Abstract: An exemplary embodiment of the invention is a Raman amplifier for use in an optical communications network. The Raman amplifier includes a plurality of pump lasers and a plurality of wavelength control modules, each associated with one of the pump lasers. Each wavelength control module includes a fiber Bragg grating optically coupled to a respective one of the plurality of pump lasers. The fiber Bragg grating receives a pump laser output from one of the pump lasers and generates a wavelength control module output. A temperature sensor is in thermal contact with the fiber Bragg grating and generates a temperature signal indicative of a temperature of the fiber Bragg grating. A controller is operatively connected to the temperature sensor and generates a control signal in response to the temperature signal. A thermal regulator is in thermal contact with the fiber Bragg grating and adjusts the temperature of the fiber Bragg grating in response to the control signal.
    Type: Grant
    Filed: July 26, 2001
    Date of Patent: February 25, 2003
    Assignee: Ciena Corporation
    Inventors: Si Hyung Cho, Jon Tsou, Jun Bao, Balakrishnan Sridhar