Patents by Inventor John Ekstrand

John Ekstrand 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).

  • Optimizing power for second laser
    Publication number: 20050078730
    Abstract: Feedback from a power monitor sampling a portion of the output beam of a cavity is used to control the position of a pump beam relative to the cavity. The pump beam position or orientation is adjusted in response to a dither signal imposed on the position or tilt of an external optic or mirror in order to maximize the efficiency of the cavity in converting pump power to output power. Feedback based on the response of the power monitor may be used to control the position or tilt of the mirror or optic to which the dither was applied.
    Type: Application
    Filed: September 27, 2004
    Publication date: April 14, 2005
    Inventors: Kevin Holsinger, John Ekstrand, Richard Boggy
  • Switched resistor regulator with diode-snubber for parasitic inductance in switched resistor
    Patent number: 4816741
    Abstract: There is disclosed a diode snubber for the voltage transients generated in the parasitic inductance of a switched resistor when current therethrough is interrupted. Also disclosed is the use of such a diode snubber in: a series switched resistor regulator; a shunt switched resistor regulator; a hybrid switched resistor regulator and a passbank switched resistor regulator. Also disclosed is the use of a linear dissipative regulator in all these forms of switched resistor regulators to maximize the effiency of power delivery to the load.
    Type: Grant
    Filed: September 30, 1987
    Date of Patent: March 28, 1989
    Assignee: Spectra Physics
    Inventor: John Ekstrand
  • Shunt switched resistor regulator with diode snubber
    Patent number: 4814966
    Abstract: There is disclosed a diode snubber for the voltage transients generated in the parasitic inductance of a switched resistor when current therethrough is interrupted. Also disclosed is the use of such a diode snubber in: a series switched resistor regulator; a shunt switched resistor regulator; a hybrid switched resistor regulator and a passbank switched resistor regulator. Also disclosed is the use of a linear dissipative regulator in all these forms of switched resistor regulators to maximize the efficiency of power delivery to the load.
    Type: Grant
    Filed: September 30, 1987
    Date of Patent: March 21, 1989
    Assignee: Spectra-Physics, Inc.
    Inventor: John Ekstrand