Patents by Inventor Duncan J W Walker

Duncan J W Walker 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).

  • Chirp-managed, electroabsorption-modulated laser
    Patent number: 7809280
    Abstract: An optical transmitter comprising: an optical source modulated with an input digital data signal so as to generate a first, frequency-modulated digital signal; and an amplitude modulator, modulated with the logical inverse of the input digital data signal, for receiving the first, frequency-modulated signal and generating a second, amplitude-modulated and frequency-modulated digital signal; wherein the optical source and the amplitude modulator are each configured so as to produce positive transient chirp.
    Type: Grant
    Filed: August 21, 2007
    Date of Patent: October 5, 2010
    Assignee: Finisar Corporation
    Inventors: Daniel Mahgerefteh, Yasuhiro Matsui, Xueyan Zheng, Bart Johnson, Duncan J W Walker, Parviz Tayebati