Patents by Inventor Paul F. Crowder

Paul F. Crowder 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).

  • Patent number: 6954476
    Abstract: A controller for use with sampled grating distributed Bragg reflector (SGDBR) lasers is presented. An exemplary controller includes a table of settings representing a control surface, each setting corresponding to a separate operating point of the SGDBR laser, a first mirror current controller and a second mirror current controller. The first mirror controller and the second mirror current controller respectively control a first mirror current and a second mirror current about an estimated extremum point of the control surface to substantially maintain alignment between each of a first mirror and a second mirror, and an associated cavity mode. The first mirror current and the second mirror current can be locked at a substantially fixed distance from the extremum of the control surface.
    Type: Grant
    Filed: May 15, 2002
    Date of Patent: October 11, 2005
    Assignee: Agility Communications, Inc.
    Inventors: Larry A. Coldren, Paul F. Crowder
  • Patent number: 6788719
    Abstract: An open loop controller for use with a sampled grating distributed Bragg reflector (SGDBR) laser is presented. The controller for provides separate inputs to the laser including a front mirror current controlling a front mirror and a back mirror current controlling a back mirror to control, as well as a phase current and a gain current. The open loop controller in accordance with the present invention further includes a lookup table generated to reflect the unique specifications of each SGDBR laser is controlled.
    Type: Grant
    Filed: June 29, 2001
    Date of Patent: September 7, 2004
    Assignee: Agility Communications, Inc.
    Inventor: Paul F. Crowder
  • Publication number: 20040136423
    Abstract: A controller for use with sampled grating distributed Bragg reflector (SGDBR) lasers is presented. An exemplary controller includes a table of settings representing a control surface, each setting corresponding to a separate operating point of the SGDBR laser, a first mirror current controller and a second mirror current controller. The first mirror controller and the second mirror current controller respectively control a first mirror current and a second mirror current about an estimated extremum point of the control surface to substantially maintain alignment between each of a first mirror and a second mirror, and an associated cavity mode. The first mirror current and the second mirror current can be locked at a substantially fixed distance from the extremum of the control surface.
    Type: Application
    Filed: November 5, 2003
    Publication date: July 15, 2004
    Inventors: Larry A Coldren, Paul F Crowder
  • Patent number: 6690693
    Abstract: The invention discloses an optical output power and output wavelength control system for use with a sampled grating distributed Bragg reflector (SGDBR) laser. The optical output power and output wavelength control system for use with a sampled grating distributed Bragg reflector (SGDBR) laser comprises a controller for providing current inputs to the laser controlling the optical output power and output wavelength and an external reference receiving an optical output from the laser and providing a reference output to the control, wherein the controller compares the optical output power and output wavelength of the laser to the reference output and locks the optical output power and output wavelength of the laser to the external reference.
    Type: Grant
    Filed: June 29, 2001
    Date of Patent: February 10, 2004
    Assignee: Agility Communications, Inc.
    Inventor: Paul F. Crowder
  • Publication number: 20020181521
    Abstract: A gain voltage controller for use with a sampled grating distributed Bragg reflector (SGDBR) laser is presented. The controller for provides separate inputs to the laser including a front mirror current controlling a front mirror and a back mirror current controlling a back mirror to control the laser and a voltage monitor, coupled to a gain section of the laser for monitoring a gain voltage of the gain section and providing input of the gain voltage to the controller. The controller controls the front mirror current and the back mirror current to minimize the voltage monitored from the gain section of the laser.
    Type: Application
    Filed: June 29, 2001
    Publication date: December 5, 2002
    Inventors: Paul F. Crowder, Larry A. Coldren
  • Publication number: 20020075918
    Abstract: An open loop controller for use with a sampled grating distributed Bragg reflector (SGDBR) laser is presented. The controller for provides separate inputs to the laser including a front mirror current controlling a front mirror and a back mirror current controlling a back mirror to control, as well as a phase current and a gain current. The open loop controller in accordance with the present invention further includes a lookup table generated to reflect the unique specifications of each SGDBR laser is controlled.
    Type: Application
    Filed: June 29, 2001
    Publication date: June 20, 2002
    Inventor: Paul F. Crowder