Patents by Inventor Charles Durfee

Charles Durfee 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).

  • Systems and methods for optical pulse shaping through nonlinear mixing
    Patent number: 12675024
    Abstract: Systems and methods for shaping temporal and amplitude profiles of optical pulses in accordance with embodiments of the invention are illustrated. One embodiment includes at least two laser emitters where each emitter configured to generate at least two input optical pulses, a pulse-shaping device configured to apply dispersions of different orders on each of the at least two input pulses, and a nonlinear crystal where the at least two input pulses applied with dispersions combine to emit an output optical pulse having an angular frequency that is the sum of the angular frequencies of the at least two input pulses.
    Type: Grant
    Filed: January 11, 2024
    Date of Patent: July 7, 2026
    Assignees: The Regents of the University of California, The Board of Trustees of the Leland Stanford Junior University, Colorado School of Mines
    Inventors: Sergio Carbajo Garcia, Randy Lemons, Charles Durfee
  • Systems and Methods for Optical Pulse Shaping Through Nonlinear Mixing
    Publication number: 20240231182
    Abstract: Systems and methods for shaping temporal and amplitude profiles of optical pulses in accordance with embodiments of the invention are illustrated. One embodiment includes at least two laser emitters where each emitter configured to generate at least two input optical pulses, a pulse-shaping device configured to apply dispersions of different orders on each of the at least two input pulses, and a nonlinear crystal where the at least two input pulses applied with dispersions combine to emit an output optical pulse having an angular frequency that is the sum of the angular frequencies of the at least two input pulses.
    Type: Application
    Filed: January 11, 2024
    Publication date: July 11, 2024
    Applicants: The Regents of the University of California, The Board of Trustees of the Leland Stanford Junior University, Colorado School of Mines
    Inventors: Sergio Carbajo Garcia, Randy Lemons, Charles Durfee
  • Spatially chirped pulses for femtosecond laser ablation through transparent materials
    Patent number: 9545689
    Abstract: Temporal focusing of spatially chirped femtosecond laser pulses overcomes previous limitations for ablating high aspect ratio features with low numerical aperture (NA) beams. Simultaneous spatial and temporal focusing reduces nonlinear interactions, such as self-focusing, prior to the focal plane so that deep (˜1 mm) features with parallel sidewalls are ablated at high material removal rates.
    Type: Grant
    Filed: December 9, 2013
    Date of Patent: January 17, 2017
    Assignee: Colorado School of Mines
    Inventors: Jeffrey Squier, Dawn Vitek, Charles Durfee, Daniel Adams, David Kleinfeld
  • Spatially chirped pulses for femtosecond laser ablation through transparent materials
    Publication number: 20140103018
    Abstract: Temporal focusing of spatially chirped femtosecond laser pulses overcomes previous limitations for ablating high aspect ratio features with low numerical aperture (NA) beams. Simultaneous spatial and temporal focusing reduces nonlinear interactions, such as self-focusing, prior to the focal plane so that deep (˜1 mm) features with parallel sidewalls are ablated at high material removal rates.
    Type: Application
    Filed: December 9, 2013
    Publication date: April 17, 2014
    Applicant: Colorado School of Mines
    Inventors: Jeffrey Squier, Dawn Vitek, Charles Durfee, Daniel Adams, David Kleinfeld
  • Spatially chirped pulses for femtosecond laser ablation through transparent materials
    Patent number: 8669488
    Abstract: Temporal focusing of spatially chirped femtosecond laser pulses overcomes previous limitations for ablating high aspect ratio features with low numerical aperture (NA) beams. Simultaneous spatial and temporal focusing reduces nonlinear interactions, such as self-focusing, prior to the focal plane so that deep (˜1 mm) features with parallel sidewalls are ablated at high material removal rates.
    Type: Grant
    Filed: March 30, 2011
    Date of Patent: March 11, 2014
    Assignee: Colorado School of Mines
    Inventors: Jeffrey Squier, Dawn Vitek, Charles Durfee, Daniel Adams, David Kleinfeld
  • Spatially chirped pulses for femtosecond laser ablation through transparent materials
    Publication number: 20110297651
    Abstract: Temporal focusing of spatially chirped femtosecond laser pulses overcomes previous limitations for ablating high aspect ratio features with low numerical aperture (NA) beams. Simultaneous spatial and temporal focusing reduces nonlinear interactions, such as self-focusing, prior to the focal plane so that deep (˜1 mm) features with parallel sidewalls are ablated at high material removal rates.
    Type: Application
    Filed: March 30, 2011
    Publication date: December 8, 2011
    Inventors: Jeffrey Squier, Dawn Vitek, David Kleinfeld, Daniel Adams, Charles Durfee