Patents by Inventor Geoff Darling

Geoff Darling 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).

  • Semiconductor optical amplifier with electronically controllable polarization dependent gain
    Patent number: 6891666
    Abstract: An optical amplifier has two amplifying sections formed in a semiconductor structure. The two amplifying sections have different ratios of gain for two polarization states (e.g., TE and TM). Thus the amplifier as a whole has a gain ratio determined by the gains of the two amplifying sections. The two amplifying sections are separately electronically controllable so as to control the gains of the two amplifying sections and thus the gain ratio of the amplifier as a whole. Such an amplifier can be made by quantum well intermixing.
    Type: Grant
    Filed: March 11, 2003
    Date of Patent: May 10, 2005
    Assignee: Fox-Tek, Inc.
    Inventors: Geoff Darling, Ted Sargent
  • Semiconductor optical amplifier with electronically controllable polarization dependent gain
    Publication number: 20040196541
    Abstract: An optical amplifier has two amplifying sections formed in a semiconductor structure. The two amplifying sections have different ratios of gain for two polarization states (e.g., TE and TM). Thus the amplifier as a whole has a gain ratio determined by the gains of the two amplifying sections. The two amplifying sections are separately electronically controllable so as to control the gains of the two amplifying sections and thus the gain ratio of the amplifier as a whole. Such an amplifier can be made by quantum well intermixing.
    Type: Application
    Filed: March 11, 2003
    Publication date: October 7, 2004
    Applicant: Fox-Tek, Inc.
    Inventors: Geoff Darling, Ted Sargent