Patents Assigned to nLIGHT, Inc.
  • Publication number: 20210373348
    Abstract: Beam combining optical systems include a fiber beam combiner having multiple inputs to which output fibers of laser diode sources are spliced. Cladding light stripping regions are situated at the splices and include exposed portions of fiber claddings that are at least partially encapsulated with an optical adhesive or a polymer. A beam combiner fiber that is optically downstream of a laser source has an exposed cladding secured to a thermally conductive support with a polymer or other material that is index matched to the exposed cladding. This construction permits attenuation of cladding light propagating toward a beam combiner from a splice.
    Type: Application
    Filed: August 16, 2021
    Publication date: December 2, 2021
    Applicant: nLIGHT, Inc.
    Inventors: Chris A. Rivera, Dahv A.V. Kliner, Joseph Emery
  • Patent number: 11179807
    Abstract: Methods include directing a laser beam to a target along a scan path at a variable scan velocity and adjusting a digital modulation during movement of the laser beam along the scan path and in relation to the variable scan velocity so as to provide a fluence at the target within a predetermined fluence range along the scan path. Some methods include adjusting a width of the laser beam with a zoom beam expander. Apparatus include a laser source situated to emit a laser beam, a 3D scanner situated to receive the laser beam and to direct the laser beam along a scan path in a scanning plane at the target, and a laser source digital modulator coupled to the laser source so as to produce a fluence at the scanning plane along the scan path that is in a predetermined fluence range as the laser beam scan speed changes along the scan path.
    Type: Grant
    Filed: May 22, 2017
    Date of Patent: November 23, 2021
    Assignee: nLIGHT, Inc.
    Inventor: Robert J. Martinsen
  • Patent number: 11173548
    Abstract: An apparatus includes an optical source situated to produce a fiducial source beam, and an optical fiducial pattern generator situated to produce with the fiducial source beam at least one transient optical fiducial on a laser processing target that is in a field of view of a laser scanner situated to scan a laser processing beam across the laser processing target, so that a positioning of the laser processing beam on the laser processing target becomes adjustable relative to the at least one transient optical fiducial.
    Type: Grant
    Filed: April 4, 2018
    Date of Patent: November 16, 2021
    Assignee: nLIGHT, Inc.
    Inventors: Jay Small, Robert J. Martinsen
  • Publication number: 20210344160
    Abstract: An optical apparatus includes one or more pump sources situated to provide laser pump light, and a gain fiber optically coupled to the one or more pump sources, the gain fiber including an actively doped core situated to produce an output beam, an inner cladding and outer cladding surrounding the doped core and situated to propagate pump light, and a polymer cladding surrounding the outer cladding and situated to guide a selected portion of the pump light coupled into the inner and outer claddings of the gain fiber. Methods of pumping a fiber sources include generating pump light from one or more pump sources, coupling the pump light into a glass inner cladding and a glass outer cladding of a gain fiber of the fiber source such that a portion of the pump light is guided by a polymer cladding surrounding the glass outer cladding, and generating a single-mode output beam from the gain fiber.
    Type: Application
    Filed: January 19, 2021
    Publication date: November 4, 2021
    Applicant: NLIGHT, INC.
    Inventors: Dahv A.V. Kliner, Roger L. Farrow
  • Publication number: 20210286200
    Abstract: A method of processing by controlling one or more beam characteristics of an optical beam may include: launching the optical beam into a first length of fiber having a first refractive-index profile (RIP); coupling the optical beam from the first length of fiber into a second length of fiber having a second RIP and one or more confinement regions; modifying the one or more beam characteristics of the optical beam in the first length of fiber, in the second length of fiber, or in the first and second lengths of fiber; confining the modified one or more beam characteristics of the optical beam within the one or more confinement regions of the second length of fiber; and/or generating an output beam, having the modified one or more beam characteristics of the optical beam, from the second length of fiber. The first RIP may differ from the second RIP.
    Type: Application
    Filed: December 18, 2020
    Publication date: September 16, 2021
    Applicant: NLIGHT, INC.
    Inventors: Ken GROSS, Brian VICTOR, Robert MARTINSEN, Dahv A.V. KLINER, Roger FARROW
  • Patent number: 11106046
    Abstract: Beam combining optical systems include a fiber beam combiner having multiple inputs to which output fibers of laser diode sources are spliced. Cladding light stripping regions are situated at the splices, and include exposed portions of fiber claddings that are at least partially encapsulated with an optical adhesive or a polymer. A beam combiner fiber that is optically downstream of a laser source has an exposed cladding secured to a thermally conductive support with a polymer or other material that is index matched to the exposed cladding. This construction permits attenuation of cladding light propagating toward a beam combiner from a splice.
    Type: Grant
    Filed: August 24, 2017
    Date of Patent: August 31, 2021
    Assignee: nLIGHT, Inc.
    Inventors: Chris A. Rivera, Dahv A. V. Kliner, Joseph Emery
  • Patent number: 11088049
    Abstract: Some embodiments may include a porous silicon carbide substrate plugged with dielectric material, the porous silicon carbide substrate including a first side to couple to a heat source and a second side to couple to an electrically conductive surface, wherein the second side is opposite the first side; wherein in the case that an opening on the area of the first side forms a channel with an opening on an area of the second side, a portion of the dielectric material located in the channel is arranged to prevent an electrical short from forming through the porous silicon carbide substrate to the electrically conductive surface. In some examples, the heat source may be one or more semiconductor laser diode chips. Other embodiments may be disclosed and/or claimed.
    Type: Grant
    Filed: October 15, 2019
    Date of Patent: August 10, 2021
    Assignee: NLIGHT INC.
    Inventor: Travis Arthur Abshere
  • Publication number: 20210226405
    Abstract: A modular and scalable high-power fiber laser system is configurable to generate 1 kW or more of laser output, and includes one or more separable pump modules separately disposed from each other, each pump module including a plurality of fiber-coupled component pump sources optically combined by one or more fiber-based pump module pump combiners, each pump module providing one or more pump module fiber outputs, and a gain module separately disposed from the one or more separable pump modules and including one or more gain module pump fiber inputs optically coupled to corresponding ones of the pump module fiber outputs, and including a gain fiber optically coupled to the one or more gain module pump fiber inputs, the gain fiber configured to generate a gain module fiber output power scalable in relation to the number and power of said pump module fiber outputs coupled to the gain fiber.
    Type: Application
    Filed: April 5, 2021
    Publication date: July 22, 2021
    Applicant: nLIGHT, Inc.
    Inventor: Dahv A.V. Kliner
  • Publication number: 20210226402
    Abstract: An apparatus includes an optical gain fiber having a core, a cladding surrounding the core, the core and cladding defining an optical gain fiber numerical aperture, and a multimode fiber having a core with a larger radius than a radius of the optical gain fiber core, a cladding surrounding the core, the core and cladding of the multimode fiber defining a multimode fiber stable numerical aperture that is larger than the optical gain fiber numerical aperture, the multimode fiber being optically coupled to the optical gain fiber so as to receive an optical beam propagating in the optical gain fiber and to stably propagate the received optical beam in the multimode fiber core with low optical loss associated with the optical coupling.
    Type: Application
    Filed: April 5, 2021
    Publication date: July 22, 2021
    Applicant: NLIGHT, INC.
    Inventors: Roger L. Farrow, Dahv A.V. Kliner
  • Patent number: 11063404
    Abstract: Disclosed are embodiments of bidirectionally emitting semiconductor (BEST) laser architectures including higher order mode suppression structures. The higher order mode suppression structures are centrally located and extend from an inner transition boundary, which may be established by confronting high reflector (HR) facets in some embodiments or a central plane defining two sides of a unitary, bidirectional optical cavity in other embodiments. Examples of the higher order mode suppression structures include narrow regions of bidirectional flared laser oscillator waveguide (FLOW) devices, which are also referred to as reduced mode diode (REM) devices; high-index regions of bidirectional higher-order mode suppressed laser (HOMSL) devices; and non- or less-etched gain-guided lateral waveguides of bidirectional low divergence semiconductor laser (LODSL) devices.
    Type: Grant
    Filed: September 13, 2019
    Date of Patent: July 13, 2021
    Assignee: nLIGHT, Inc.
    Inventor: Manoj Kanskar
  • Patent number: 11027366
    Abstract: A laser system including a rack, a plurality of laser modules mounted in the rack to drive light through an optical fiber exiting the system, and a power distribution module to distribute electricity through circuit branches coupled to the laser modules is generally presented. In some embodiments, the rack includes a horizontal cross-member with a bottom rack flange extending vertically and defining a bottom of an opening in the rack.
    Type: Grant
    Filed: August 25, 2017
    Date of Patent: June 8, 2021
    Assignee: NLIGHT, INC.
    Inventors: Joseph J. Emery, Jeremy Young, Shelly Lin, Ken Almonte, Nathaniel Black
  • Patent number: 11025034
    Abstract: A laser cooling system includes a first tubing, a second tubing, and a cold plate assembly including a first channel to receive the first tubing and a second channel to receive the second tubing. A joint removably couples the first tubing to the second tubing and at least one component mounted on the cold plate assembly over the first tubing or the second tubing. The inlet end of the first tubing receives a cooling fluid and an outlet end of the second tubing discharges the cooling fluid after the cooling fluid flows through the first tubing, the joint, and the second tubing to maintain uniform a temperature of the at least one component mounted on the cold plate assembly.
    Type: Grant
    Filed: August 28, 2017
    Date of Patent: June 1, 2021
    Assignee: NLIGHT, INC.
    Inventors: Aaron Ludwig Hodges, Rodney Mark Stephens
  • Patent number: 11022760
    Abstract: An apparatus includes a camera, a dark field illumination source, and a fiber inspection housing including a fiber connector input situated to receive an optical fiber connector so that an optical fiber output end of the optical fiber connector is removably insertable into an interior region of the fiber inspection housing and securable at a predetermined location in the interior region, a camera input situated to receive and secure the camera so that the camera is in optical communication with the interior region and the optical fiber output end, and a dark field illumination source input situated to receive the dark field illumination source so that light emitted from the dark field illumination source is received by the optical fiber output end at a dark field illumination angle and is scattered by contamination or defects associated with the optical fiber output end so as to be detectable by the camera.
    Type: Grant
    Filed: April 29, 2016
    Date of Patent: June 1, 2021
    Assignee: nLIGHT, Inc.
    Inventors: Aaron Brown, Dahv A. V. Kliner, Scott R. Karlsen, Jeremy Young, Ryan Hawke, David R. Balsley, Ron Stevens
  • Publication number: 20210159673
    Abstract: A number of beams that can be coupled into an optical fiber can be increased using emitted beams having greater divergence, thus providing increased beam power. Alternatively, with a fixed number of emitters, total optical power can be maintained with fewer beams in an output beam with a smaller numerical aperture.
    Type: Application
    Filed: November 25, 2020
    Publication date: May 27, 2021
    Applicant: nLIGHT, Inc.
    Inventors: Zhigang Chen, David Martin Hemenway, Manoj Kanskar
  • Patent number: 11009657
    Abstract: Spliced multi-clad optical fibers with a cladding light stripper (CLS) encapsulating the splice. The splice may facilitate conversion between two optical fibers having different architectures, such as different core and/or cladding dimensions. The CLS may comprise a first length of fiber on a first side of the splice, and a second length of fiber on a second side of the splice, encapsulating the splice within the lengths of the CLS. The splice may abut one or more of the lengths of the CLS, or may be separated from one or more lengths of the CLS by an intermediate length of a first and/or second fiber joined by the splice.
    Type: Grant
    Filed: August 23, 2019
    Date of Patent: May 18, 2021
    Assignee: NLIGHT, INC.
    Inventors: Ryan Hawke, Teemu Kokki, Shaun Hampton, Chris Luetjen
  • Patent number: 11008644
    Abstract: A method of non-ablatively laser patterning a multi-layer structure, the multi-layer structure including a substrate, a first layer disposed on the substrate, a second layer disposed on the first layer, and a third layer disposed on the second layer, the method including generating at least one laser pulse having laser parameters selected for non-ablatively changing the conductivity a selected portion of the third layer such that the selected portion becomes non-conductive, and directing the pulse to the multi-layer structure, wherein the conductivity of the first layer is not substantially changed by the pulse.
    Type: Grant
    Filed: September 25, 2018
    Date of Patent: May 18, 2021
    Assignee: nLIGHT, Inc.
    Inventors: Adam Dittli, Robert J. Martinsen
  • Publication number: 20210126435
    Abstract: Apparatus include a first laser diode situated to emit a beam from an exit facet along an optical axis, the beam as emitted having perpendicular fast and slow axes perpendicular to the optical axis, a first fast axis collimator (FAC) optically coupled to the beam as emitted from the exit facet and configured to direct the beam along a redirected beam axis having a non-zero angle with respect to the optical axis of the first laser diode, a second laser diode situated to emit a beam from an exit facet of the second laser diode along an optical axis parallel to the optical axis of the first laser diode and with a slow axis in a common plane with the slow axis of the first laser diode, and a second fast axis collimator (FAC) optically coupled to the beam as emitted from the exit facet of the second laser diode and configured to direct the beam along a redirected beam axis having a non-zero angle with respect to the optical axis of the second laser diode.
    Type: Application
    Filed: November 9, 2020
    Publication date: April 29, 2021
    Applicant: nLIGHT, Inc.
    Inventors: Zhigang Chen, Manoj Kanskar, Shuang Li, Jim Zhang, Mark DeFranza, David Martin Hemenway, Eric Martin, Jay Small
  • Patent number: 10971884
    Abstract: An apparatus includes an optical gain fiber having a core, a cladding surrounding the core, the core and cladding defining an optical gain fiber numerical aperture, and a multimode fiber having a core with a larger radius than a radius of the optical gain fiber core, a cladding surrounding the core, the core and cladding of the multimode fiber defining a multimode fiber stable numerical aperture that is larger than the optical gain fiber numerical aperture, the multimode fiber being optically coupled to the optical gain fiber so as to receive an optical beam propagating in the optical gain fiber and to stably propagate the received optical beam in the multimode fiber core with low optical loss associated with the optical coupling.
    Type: Grant
    Filed: July 6, 2018
    Date of Patent: April 6, 2021
    Assignee: NLIGHT, INC.
    Inventors: Roger L. Farrow, Dahv A. V. Kliner
  • Patent number: 10971885
    Abstract: A modular and scalable high-power fiber laser system is configurable to generate 1 kW or more of laser output, and includes one or more separable pump modules separately disposed from each other, each pump module including a plurality of fiber-coupled component pump sources optically combined by one or more fiber-based pump module pump combiners, each pump module providing one or more pump module fiber outputs, and a gain module separately disposed from the one or more separable pump modules and including one or more gain module pump fiber inputs optically coupled to corresponding ones of the pump module fiber outputs, and including a gain fiber optically coupled to the one or more gain module pump fiber inputs, the gain fiber configured to generate a gain module fiber output power scalable in relation to the number and power of said pump module fiber outputs coupled to the gain fiber.
    Type: Grant
    Filed: March 5, 2018
    Date of Patent: April 6, 2021
    Assignee: nLIGHT, Inc.
    Inventor: Dahv A. V. Kliner
  • Patent number: 10957541
    Abstract: Laser pulses from pulsed fiber lasers are directed to an amorphous silicon layer to produce a polysilicon layer comprising a disordered arrangement of crystalline regions by repeated melting and recrystallization. Laser pulse durations of about 0.5 to 5 ns at wavelength range between about 500 nm and 1000 nm, at repetition rates of 10 kHz to 10 MHz can be used. Line beam intensity uniformity can be improved by spectrally broadening the laser pulses by Raman scattering in a multimode fiber or by applying varying phase delays to different portions of a beam formed with the laser pulses to reduce beam coherence.
    Type: Grant
    Filed: October 10, 2019
    Date of Patent: March 23, 2021
    Assignee: nLIGHT, Inc.
    Inventors: Robert J. Martinsen, Scott R. Karlsen, Ken Gross