Patents by Inventor Robert A. Stegeman

Robert A. Stegeman 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: 11658466
    Abstract: Apparatus, systems and methods to spectrally beam combine a group of diode lasers in an external cavity arrangement. A dichroic beam combiner or volume Bragg grating beam combiner is placed in an external cavity to force each of the diode lasers or groups of diode lasers to oscillate at a wavelength determined by the passband of the beam combiner. In embodiments the combination of a large number of laser diodes in a sufficiently narrow bandwidth to produce a high brightness laser source that has many applications including as to pump a Raman laser or Raman amplifier.
    Type: Grant
    Filed: October 12, 2020
    Date of Patent: May 23, 2023
    Assignee: Nuburu, Inc.
    Inventors: Mark S. Zediker, Robert Stegeman
  • Patent number: 11163111
    Abstract: A multi-clad optical fiber design is described in order to provide low optical loss, a high numerical aperture (NA), and high optical gain for the fundamental propagating mode, the linearly polarized (LP) 01 mode in the UV and visible portion of the optical spectrum. The optical fiber design may contain dopants in order to simultaneously increase the optical gain in the core region while avoiding additional losses during the fiber fabrication process. The optical fiber design may incorporate rare-earth dopants for efficient lasing. Additionally, the modal characteristics of the propagating modes in the optical core promote highly efficient nonlinear mixing, providing for a high beam quality (M2<1.5) output of the emitted light.
    Type: Grant
    Filed: April 27, 2020
    Date of Patent: November 2, 2021
    Assignee: Nuburu, Inc.
    Inventors: Mark S. Zediker, Robert A. Stegeman, James P. Tucker, Jean-Philippe Feve
  • Publication number: 20210257813
    Abstract: Apparatus, systems and methods to spectrally beam combine a group of diode lasers in an external cavity arrangement. A dichroic beam combiner or volume Bragg grating beam combiner is placed in an external cavity to force each of the diode lasers or groups of diode lasers to oscillate at a wavelength determined by the passband of the beam combiner. In embodiments the combination of a large number of laser diodes in a sufficiently narrow bandwidth to produce a high brightness laser source that has many applications including as to pump a Raman laser or Raman amplifier.
    Type: Application
    Filed: October 12, 2020
    Publication date: August 19, 2021
    Applicant: Nuburu, Inc.
    Inventors: Mark S. Zediker, Robert Stegeman
  • Publication number: 20210048578
    Abstract: A multi-clad optical fiber design is described in order to provide low optical loss, a high numerical aperture (NA), and high optical gain for the fundamental propagating mode, the linearly polarized (LP) 01 mode in the UV and visible portion of the optical spectrum. The optical fiber design may contain dopants in order to simultaneously increase the optical gain in the core region while avoiding additional losses during the fiber fabrication process. The optical fiber design may incorporate rare-earth dopants for efficient lasing. Additionally, the modal characteristics of the propagating modes in the optical core promote highly efficient nonlinear mixing, providing for a high beam quality (M2<1.5) output of the emitted light.
    Type: Application
    Filed: April 27, 2020
    Publication date: February 18, 2021
    Applicant: Nuburu, Inc.
    Inventors: Mark S. Zediker, Robert A. Stegeman, James P. Tucker, Jean-Philippe Feve
  • Patent number: 10804680
    Abstract: Apparatus, systems and methods to spectrally beam combine a group of diode lasers in an external cavity arrangement. A dichroic beam combiner or volume Bragg grating beam combiner is placed in an external cavity to force each of the diode lasers or groups of diode lasers to oscillate at a wavelength determined by the passband of the beam combiner. In embodiments the combination of a large number of laser diodes in a sufficiently narrow bandwidth to produce a high brightness laser source that has many applications including as to pump a Raman laser or Raman amplifier.
    Type: Grant
    Filed: June 13, 2018
    Date of Patent: October 13, 2020
    Assignee: Nuburu, Inc.
    Inventors: Mark S. Zediker, Robert Stegeman
  • Publication number: 20200271859
    Abstract: Fiber laser having a monolithic laser resonator having laser affected zones for providing laser beams having wavelengths below 800 nm and from between 400 nm to 800 nm. Methods of using femtosecond lasers to form fiber Bragg gratings, volume Bragg gratings, space gratings, and laser beam delivery patterns for changing the index of refraction within optical fibers.
    Type: Application
    Filed: October 29, 2019
    Publication date: August 27, 2020
    Applicant: Nuburu, Inc.
    Inventors: Mark S. Zediker, Matthew Silva Sa, Robert Stegeman, James Tucker, Donald A. Millick
  • Patent number: 10656328
    Abstract: Fiber laser having a monolithic laser resonator having laser affected zones for providing laser beams having wavelengths below 800 nm and from between 400 nm to 800 nm. Methods of using femtosecond lasers to form fiber Bragg gratings, volume Bragg gratings, space gratings, and laser beam delivery patterns for changing the index of refraction within optical fibers.
    Type: Grant
    Filed: April 28, 2017
    Date of Patent: May 19, 2020
    Assignee: Nuburu, Inc.
    Inventors: Mark S. Zediker, Matthew Silva Sa, Robert Stegeman, James Tucker, Donald A. Millick
  • Patent number: 10634842
    Abstract: A multi-clad optical fiber design is described in order to provide low optical loss, a high numerical aperture (NA), and high optical gain for the fundamental propagating mode, the linearly polarized (LP) 01 mode in the UV and visible portion of the optical spectrum. The optical fiber design may contain dopants in order to simultaneously increase the optical gain in the core region while avoiding additional losses during the fiber fabrication process. The optical fiber design may incorporate rare-earth dopants for efficient lasing. Additionally, the modal characteristics of the propagating modes in the optical core promote highly efficient nonlinear mixing, providing for a high beam quality (M2<1.5) output of the emitted light.
    Type: Grant
    Filed: April 20, 2018
    Date of Patent: April 28, 2020
    Assignee: Nuburu, Inc.
    Inventors: Mark S. Zediker, Robert A. Stegeman, James P. Tucker, Jean-Philippe Feve
  • Publication number: 20190025502
    Abstract: A multi-clad optical fiber design is described in order to provide low optical loss, a high numerical aperture (NA), and high optical gain for the fundamental propagating mode, the linearly polarized (LP) 01 mode in the UV and visible portion of the optical spectrum. The optical fiber design may contain dopants in order to simultaneously increase the optical gain in the core region while avoiding additional losses during the fiber fabrication process. The optical fiber design may incorporate rare-earth dopants for efficient lasing. Additionally, the modal characteristics of the propagating modes in the optical core promote highly efficient nonlinear mixing, providing for a high beam quality (M2<1.5) output of the emitted light.
    Type: Application
    Filed: April 20, 2018
    Publication date: January 24, 2019
    Applicant: Nuburu, Inc.
    Inventors: Mark S. Zediker, Robert A. Stegeman, James P. Tucker, Jean-Philippe Feve
  • Publication number: 20180375296
    Abstract: Apparatus, systems and methods to spectrally beam combine a group of diode lasers in an external cavity arrangement. A dichroic beam combiner or volume Bragg grating beam combiner is placed in an external cavity to force each of the diode lasers or groups of diode lasers to oscillate at a wavelength determined by the passband of the beam combiner. In embodiments the combination of a large number of laser diodes in a sufficiently narrow bandwidth to produce a high brightness laser source that has many applications including as to pump a Raman laser or Raman amplifier.
    Type: Application
    Filed: June 13, 2018
    Publication date: December 27, 2018
    Applicant: Nuburu, Inc.
    Inventors: Mark S. Zediker, Robert Stegeman
  • Publication number: 20170343729
    Abstract: Fiber laser having a monolithic laser resonator having laser affected zones for providing laser beams having wavelengths below 800 nm and from between 400 nm to 800 nm. Methods of using femtosecond lasers to form fiber Bragg gratings, volume Bragg gratings, space gratings, and laser beam delivery patterns for changing the index of refraction within optical fibers.
    Type: Application
    Filed: April 28, 2017
    Publication date: November 30, 2017
    Applicant: NUBURU, INC.
    Inventors: Mark S. Zediker, Matthew Silva Sa, Robert Stegeman, James Tucker, Don Millick
  • Patent number: 9466939
    Abstract: A method of operating a Tm:doped fiber amplifier including selecting a length of Tm:doped optical fiber to be less than one hundred meters, doping the optical fiber with active ions at a doping level of greater than one percent, optically pumping the doped optical fiber with a first laser beam having a wavelength longer than the wavelength where a maximum absorption cross section is provided by the active ions, and creating a population inversion between two active ion energy levels with the first laser beam, the active ions providing a gain to a second laser beam.
    Type: Grant
    Filed: September 2, 2015
    Date of Patent: October 11, 2016
    Assignee: Physical Sciences, Inc.
    Inventors: Peter F. Moulton, Robert Stegeman
  • Publication number: 20160094005
    Abstract: A method of operating a Tm:doped fiber amplifier including selecting a length of Tm:doped optical fiber to be less than one hundred meters, doping the optical fiber with active ions at a doping level of greater than one percent, optically pumping the doped optical fiber with a first laser beam having a wavelength longer than the wavelength where a maximum absorption cross section is provided by the active ions, and creating a population inversion between two active ion energy levels with the first laser beam, the active ions providing a gain to a second laser beam.
    Type: Application
    Filed: September 2, 2015
    Publication date: March 31, 2016
    Inventors: Peter F. Moulton, Robert Stegeman