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).
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Publication number: 20240235165Abstract: 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: ApplicationFiled: May 18, 2023Publication date: July 11, 2024Applicant: Nuburu, Inc.Inventors: Mark S. Zediker, Robert Stegeman
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Publication number: 20240136801Abstract: 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: ApplicationFiled: May 17, 2023Publication date: April 25, 2024Applicant: Nuburu, Inc.Inventors: Mark S. Zediker, Robert Stegeman
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Patent number: 11658466Abstract: 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: GrantFiled: October 12, 2020Date of Patent: May 23, 2023Assignee: Nuburu, Inc.Inventors: Mark S. Zediker, Robert Stegeman
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Patent number: 11163111Abstract: 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: GrantFiled: April 27, 2020Date of Patent: November 2, 2021Assignee: Nuburu, Inc.Inventors: Mark S. Zediker, Robert A. Stegeman, James P. Tucker, Jean-Philippe Feve
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Publication number: 20210257813Abstract: 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: ApplicationFiled: October 12, 2020Publication date: August 19, 2021Applicant: Nuburu, Inc.Inventors: Mark S. Zediker, Robert Stegeman
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Publication number: 20210048578Abstract: 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: ApplicationFiled: April 27, 2020Publication date: February 18, 2021Applicant: Nuburu, Inc.Inventors: Mark S. Zediker, Robert A. Stegeman, James P. Tucker, Jean-Philippe Feve
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Patent number: 10804680Abstract: 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: GrantFiled: June 13, 2018Date of Patent: October 13, 2020Assignee: Nuburu, Inc.Inventors: Mark S. Zediker, Robert Stegeman
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Publication number: 20200271859Abstract: 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: ApplicationFiled: October 29, 2019Publication date: August 27, 2020Applicant: Nuburu, Inc.Inventors: Mark S. Zediker, Matthew Silva Sa, Robert Stegeman, James Tucker, Donald A. Millick
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Patent number: 10656328Abstract: 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: GrantFiled: April 28, 2017Date of Patent: May 19, 2020Assignee: Nuburu, Inc.Inventors: Mark S. Zediker, Matthew Silva Sa, Robert Stegeman, James Tucker, Donald A. Millick
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Patent number: 10634842Abstract: 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: GrantFiled: April 20, 2018Date of Patent: April 28, 2020Assignee: Nuburu, Inc.Inventors: Mark S. Zediker, Robert A. Stegeman, James P. Tucker, Jean-Philippe Feve
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Publication number: 20190025502Abstract: 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: ApplicationFiled: April 20, 2018Publication date: January 24, 2019Applicant: Nuburu, Inc.Inventors: Mark S. Zediker, Robert A. Stegeman, James P. Tucker, Jean-Philippe Feve
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Publication number: 20180375296Abstract: 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: ApplicationFiled: June 13, 2018Publication date: December 27, 2018Applicant: Nuburu, Inc.Inventors: Mark S. Zediker, Robert Stegeman
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Publication number: 20170343729Abstract: 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: ApplicationFiled: April 28, 2017Publication date: November 30, 2017Applicant: NUBURU, INC.Inventors: Mark S. Zediker, Matthew Silva Sa, Robert Stegeman, James Tucker, Don Millick
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Patent number: 9466939Abstract: 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: GrantFiled: September 2, 2015Date of Patent: October 11, 2016Assignee: Physical Sciences, Inc.Inventors: Peter F. Moulton, Robert Stegeman
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Publication number: 20160094005Abstract: 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: ApplicationFiled: September 2, 2015Publication date: March 31, 2016Inventors: Peter F. Moulton, Robert Stegeman