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No. Publication Number Title Publication/Patent Number Publication/Patent Number Publication Date Publication Date
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1 US10564361B2
Passively aligned single element telescope for improved package brightness
Publication/Patent Number: US10564361B2 Publication Date: 2020-02-18 Application Number: 16/353,586 Filing Date: 2019-03-14 Inventor: Hemenway, David Martin   Dawson, David C.   Urbanek, Wolfram   Assignee: Nlight inc   IPC: G02B6/28 Abstract: Beam compressors include separated surfaces having positive and negative optical powers. A surface spacing is selected so that a collimated beam input to the beam compressor is output as a collimated beam. In some examples, beam compressors are situated to compress a laser beam stack that includes beams associated with a plurality of laser diodes. Beam compression ratios are typically selected so that a compressed beam stack focused into an optical waveguide has a numerical aperture corresponding to the numerical aperture of the optical waveguide.
2 US10682726B2
Beam modification structures and methods of modifying optical beam characteristics using the beam modification structures
Publication/Patent Number: US10682726B2 Publication Date: 2020-06-16 Application Number: 15/938,925 Filing Date: 2018-03-28 Inventor: Gross, Ken   Kliner, Dahv A. V.   Farrow, Roger   Assignee: Nlight inc   IPC: B23K26/06 Abstract: An optical beam delivery device. The device comprises a first length of fiber comprising a first RIP formed to enable the adjusting of one or more beam characteristics of an optical beam by a perturbation device. The optical beam delivery device further comprises a second length of fiber having a proximal end for receiving the optical beam from the first length of fiber and a distal end. The proximal end is coupled to the first length of fiber. The second length of fiber comprises a second RIP formed to confine at least a portion of the optical beam within one or more confinement regions. A beam modification structure is disposed at, or a distance from, the distal end of the second length of fiber. The beam modification structure is configured to modify at least one property of the optical beam chosen from beam divergence properties, beam spatial properties and beam directional characteristics.
3 US10663767B2
Adjustable beam characteristics
Publication/Patent Number: US10663767B2 Publication Date: 2020-05-26 Application Number: 15/607,410 Filing Date: 2017-05-26 Inventor: Kliner, Dahv A. V.   Farrow, Roger   Assignee: Nlight inc   IPC: G02F1/01 Abstract: Disclosed herein are methods, apparatus, and systems for providing an optical beam delivery device, comprising a first length of fiber comprising a first RIP formed to enable modification of one or more beam characteristics of an optical beam by a perturbation device and a second length of fiber having a second RIP coupled to the first length of fiber, the second RIP formed to confine at least a portion of the modified beam characteristics of the optical beam within one or more confinement regions.
4 US10739621B2
Methods of and systems for materials processing using optical beams
Publication/Patent Number: US10739621B2 Publication Date: 2020-08-11 Application Number: 15/938,790 Filing Date: 2018-03-28 Inventor: Victor, Brian   Rivera, Christopher A.   Kliner, Dahv A.v.   Farrow, Roger   Assignee: Nlight inc   IPC: G02F1/01 Abstract: A method of materials processing using an optical beam includes: 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; modifying 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; 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 can be the same as or differ from the second RIP. The modifying of the one or more beam characteristics can include changing the one or more beam characteristics from a first state to a second state. The first state can differ from the second state.
5 US10732439B2
Fiber-coupled device for varying beam characteristics
Publication/Patent Number: US10732439B2 Publication Date: 2020-08-04 Application Number: 15/939,064 Filing Date: 2018-03-28 Inventor: Kliner, Dahv A. V.   Farrow, Roger L.   Assignee: Nlight inc   IPC: G02F1/01 Abstract: Disclosed herein are methods, apparatus, and systems for providing an optical beam delivery system, comprising an optical fiber including a first length of fiber comprising a first RIP formed to enable, at least in part, modification of one or more beam characteristics of an optical beam by a perturbation assembly arranged to modify the one or more beam characteristics, the perturbation assembly coupled to the first length of fiber or integral with the first length of fiber, or a combination thereof and a second length of fiber coupled to the first length of fiber and having a second RIP formed to preserve at least a portion of the one or more beam characteristics of the optical beam modified by the perturbation assembly within one or more first confinement regions. The optical beam delivery system may include an optical system coupled to the second length of fiber including one or more free-space optics configured to receive and transmit an optical beam comprising the modified one or more beam characteristics.
6 US10730785B2
Optical fiber bending mechanisms
Publication/Patent Number: US10730785B2 Publication Date: 2020-08-04 Application Number: 15/938,959 Filing Date: 2018-03-28 Inventor: Brown, Aaron   Hodges, Aaron Ludwig   Kliner, Dahv A. V.   Assignee: Nlight inc   IPC: C03B37/15 Abstract: Fiber bending mechanisms vary beam characteristics by deflecting or bending one or more fibers, by urging portions of one or more fibers toward a fiber shaping surface having a selectable curvature, or by selecting a fiber length that is to be urged toward the fiber shaping surface. In some examples, a fiber is secured to a flexible plate to conform to a variable curvature of the flexible plate. In other examples, a variable length of a fiber is pulled or pushed toward a fiber shaping surface, and the length of the fiber or a curvature of the flexible plate provide modification of fiber beam characteristics.
7 US2020161515A1
HIGH-POWER LASER DIODE PACKAGE IMPLEMENTED WITH MENISCUS SLOW AXIS COLLIMATOR FOR REDUCED DIODE PACKAGE FOOTPRINT OR IMPROVED LASER OUTPUT BRIGHTNESS
Publication/Patent Number: US2020161515A1 Publication Date: 2020-05-21 Application Number: 16/192,696 Filing Date: 2018-11-15 Inventor: Hemenway, David Martin   Assignee: Nlight inc   IPC: H01L33/58 Abstract: A high-power laser diode assembly uses a greater number of emitters in a laser diode package or uses larger, wider laser diode emitters to produce higher-power laser output. Each assembly design option includes a meniscus slow axis collimator lens having a light entrance surface imparting strong negative lens surface power to diverge an incident beam outwards and a light exit surface imparting even stronger positive lens surface power to collimate the rapidly diverging beam. In one example, a 5 mm focal length meniscus collimator lens, as compared to a standard 12 mm focal length collimator lens, can reduce by 7 mm the physical path from the collimator lens to the laser diode. In another example, a 15 mm focal length meniscus collimator lens with the same back focal length as that of a standard 12 mm collimator facilitates increasing chip-on-submount width from 200 μm to 250 μm.
8 US2020319408A9
METHODS OF AND SYSTEMS FOR PROCESSING USING ADJUSTABLE BEAM CHARACTERISTICS
Publication/Patent Number: US2020319408A9 Publication Date: 2020-10-08 Application Number: 15/883,480 Filing Date: 2018-01-30 Inventor: Gross, Ken   Victor, Brian   Martinsen, Robert   Kliner, Dahv A.v.   Farrow, Roger   Assignee: Nlight inc   IPC: G02B6/26 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.
9 US10761276B2
Passively aligned crossed-cylinder objective assembly
Publication/Patent Number: US10761276B2 Publication Date: 2020-09-01 Application Number: 15/154,663 Filing Date: 2016-05-13 Inventor: Hemenway, David Martin   Brown, Aaron   Dawson, David C.   Hoener, Kylan   Lin, Shelly   Urbanek, Wolfram   Assignee: Nlight inc   IPC: G02B6/42 Abstract: A cross-cylinder objective assembly includes a fast axis objective (FAO) situated along an optical axis for focusing an incident laser beam along a fast axis, a slow axis objective (SAO) situated along the optical axis for focusing the incident laser beam along a slow axis, and a lens cell having fast and slow axis objective receiving portions for registering the FAO and SAO at a predetermined spacing along the optical axis.
10 US202001396A1
CALIBRATION TEST PIECE FOR GALVANOMETRIC LASER CALIBRATION
Publication/Patent Number: US202001396A1 Publication Date: 2020-01-02 Application Number: 20/191,655 Filing Date: 2019-08-30 Inventor: Martinsen, Robert J.   Brown, Aaron   Small, Jay   Assignee: Nlight inc   IPC: B23K26/082 Abstract: Some embodiments may include a galvanometric laser system, comprising: a laser device to generate a laser beam; an X-Y scan head module to position the laser beam on a work piece, the X-Y scan head module including a laser ingress to receive the laser beam and a laser egress to output the laser beam; a support platen located below the laser egress; an in-machine imaging system integrated with the galvanometric laser, wherein a camera of the in-machine imaging system is arranged to view a surface of an object located on the support platen using one or more optical components of the X-Y scan head module to generate assessment data associated with a calibration of the X-Y scan head module by imaging the surface of the object, wherein a calibration fiducial is located on the surface of the object.
11 US10751834B2
Optical beam delivery device formed of optical fibers configured for beam divergence or mode coupling control
Publication/Patent Number: US10751834B2 Publication Date: 2020-08-25 Application Number: 15/938,854 Filing Date: 2018-03-28 Inventor: Koponen, Joona   Farrow, Roger L.   Kliner, Dahv A. V.   Assignee: Nlight inc   IPC: B23K26/06 Abstract: An optical beam delivery device is formed of optical fibers configured for beam divergence or mode coupling control. An incident optical beam propagates through a first length of fiber, which is coupled to a second length of fiber and has a first refractive index profile (RIP). The first RIP enables, in response to an applied perturbation, modification of the beam characteristics of the incident optical beam to form an adjusted optical beam having modified beam characteristics relative to beam characteristics of the incident optical beam. The second length of fiber is formed with one or more confinement regions defining a second RIP and arranged to confine at least a portion of the adjusted optical beam. The second and first lengths of fiber are tapered in the direction of light beam propagation to control output beam divergence or susceptibility to beam mode coupling in the first length of fiber, respectively.
12 US2020333640A1
ADJUSTABLE BEAM CHARACTERISTICS
Publication/Patent Number: US2020333640A1 Publication Date: 2020-10-22 Application Number: 16/921,531 Filing Date: 2020-07-06 Inventor: Kliner, Dahv A.v.   Farrow, Roger   Assignee: Nlight inc   IPC: G02F1/01 Abstract: Disclosed herein are methods, apparatus, and systems for providing an optical beam delivery system, comprising an optical fiber including a first length of fiber comprising a first RIP formed to enable, at least in part, modification of one or more beam characteristics of an optical beam by a perturbation assembly arranged to modify the one or more beam characteristics, the perturbation assembly coupled to the first length of fiber or integral with the first length of fiber, or a combination thereof and a second length of fiber coupled to the first length of fiber and having a second RIP formed to preserve at least a portion of the one or more beam characteristics of the optical beam modified by the perturbation assembly within one or more first confinement regions. The optical beam delivery system may include an optical system coupled to the second length of fiber including one or more free-space optics configured to receive and transmit an optical beam comprising the modified one or more beam characteristics.
13 US10651355B1
High-power laser diode package implemented with meniscus slow axis collimator for reduced diode package footprint or improved laser output brightness
Publication/Patent Number: US10651355B1 Publication Date: 2020-05-12 Application Number: 16/192,696 Filing Date: 2018-11-15 Inventor: Hemenway, David Martin   Assignee: Nlight inc   IPC: H01S5/40 Abstract: A high-power laser diode assembly uses a greater number of emitters in a laser diode package or uses larger, wider laser diode emitters to produce higher-power laser output. Each assembly design option includes a meniscus slow axis collimator lens having a light entrance surface imparting strong negative lens surface power to diverge an incident beam outwards and a light exit surface imparting even stronger positive lens surface power to collimate the rapidly diverging beam. In one example, a 5 mm focal length meniscus collimator lens, as compared to a standard 12 mm focal length collimator lens, can reduce by 7 mm the physical path from the collimator lens to the laser diode. In another example, a 15 mm focal length meniscus collimator lens with the same back focal length as that of a standard 12 mm collimator facilitates increasing chip-on-submount width from 200 μm to 250 μm.
14 US10670872B2
All-fiber optical beam switch
Publication/Patent Number: US10670872B2 Publication Date: 2020-06-02 Application Number: 15/934,959 Filing Date: 2018-03-24 Inventor: Karlsen, Scott R.   Victor, Brian M.   Farrow, Roger L.   Assignee: Nlight inc   IPC: G02B6/27 Abstract: An all-fiber optical beam switch mechanism includes a first length of fiber through which an incident optical beam having beam characteristics propagates along a first propagation path and which has a first refractive index profile (RIP). The first RIP enables, in response to an applied perturbation, modification of the optical beam to form an adjusted optical beam that is movable to propagate along a second propagation path. A second length of fiber is coupled to the first length of fiber and formed with multiple spaced-apart, non-coaxial confinement cores. A selected state of applied perturbation moves the second propagation path of the adjusted optical beam to a position of a selected corresponding one of the multiple confinement cores to confine and thereby direct the adjusted optical beam to a corresponding beam output location at the output of the second length of fiber.
15 US10668567B2
Multi-operation laser tooling for deposition and material processing operations
Publication/Patent Number: US10668567B2 Publication Date: 2020-06-02 Application Number: 15/933,160 Filing Date: 2018-03-22 Inventor: Victor, Brian M.   Gross, Ken   Brown, Aaron W.   Kliner, Dahv A. V.   Assignee: Nlight inc   IPC: B23K26/34 Abstract: Disclosed herein are methods, apparatus, and systems for a multi-operation optical beam delivery device having a laser source to generate the optical beam. A beam characteristic conditioner that, in response to a control input indicating a change between the different laser process operations, controllably modifies the beam characteristics for a corresponding laser process operation of the different laser process operations. A delivery fiber has an input end coupled to the beam characteristic conditioner and an output end coupled to a process head for performing the corresponding laser process operation.
16 US10732357B2
Fiber termination assembly
Publication/Patent Number: US10732357B2 Publication Date: 2020-08-04 Application Number: 14/921,203 Filing Date: 2015-10-23 Inventor: Hoener, Kylan   Dawson, David C.   Shea, Kevin A.   Price, R. Kirk   Assignee: Nlight inc   IPC: G02B6/38 Abstract: A fiber termination assembly includes an optical fiber inserted into an optical ferrule disposed in an optical passageway of a heat conductive housing, the optical passageway providing an optical path aligned with the openings of the housing, the optical ferrule including a central bore concentrically disposed about the optical path and configured to receive a portion of a proximal end of the optical fiber therein, the optical ferrule and optical fiber secured in relation to the heat conductive housing with epoxy at a distal end of the optical ferrule, wherein the optical ferrule is transparent at a predetermined wavelength of light such that for light coupled into an input surface of the proximal end of the optical fiber at least a portion of the light propagating as cladding modes is stripped out of the optical fiber and transported to and dissipated in the heat conductive housing.
17 US10658813B2
Low divergence high brightness broad area lasers
Publication/Patent Number: US10658813B2 Publication Date: 2020-05-19 Application Number: 16/001,734 Filing Date: 2018-06-06 Inventor: Chen, Zhigang   Kanskar, Manoj   Assignee: Nlight inc   IPC: H01S5/026 Abstract: Apparatus comprise a semiconductor waveguide extending along a longitudinal axis and including a first waveguide section and a second waveguide section, wherein a lateral refractive index difference defining the semiconductor waveguide is larger for the first waveguide section than for the second waveguide section, and an output facet situated on the longitudinal axis of the semiconductor waveguide so as to emit a laser beam propagating in the semiconductor waveguide, wherein the first waveguide section is situated between the second waveguide section and the output facet and wherein the lateral refractive index difference suppresses emission of higher order transverse modes in the laser beam emitted by the output facet.
18 US2020064573A1
BACK-REFLECTION PROTECTION AND MONITORING IN FIBER AND FIBER-DELIVERED LASERS
Publication/Patent Number: US2020064573A1 Publication Date: 2020-02-27 Application Number: 16/417,337 Filing Date: 2019-05-20 Inventor: Kliner, Dahv A. V.   Assignee: Nlight inc   IPC: G02B6/42 Abstract: A system includes an optical fiber situated to propagate a laser beam received from a laser source to an output of the optical fiber, a first cladding light stripper optically coupled to the optical fiber and situated to extract at least a portion of forward-propagating cladding light in the optical fiber, and a second cladding light stripper optically coupled to the optical fiber between the first cladding light stripper and the optical fiber output and situated to extract at least a portion of backward-propagating cladding light in the optical fiber.
19 US10663769B2
Systems and methods for modifying beam characteristics
Publication/Patent Number: US10663769B2 Publication Date: 2020-05-26 Application Number: 15/939,141 Filing Date: 2018-03-28 Inventor: Karlsen, Scott   Victor, Brian   Kliner, Dahv A. V.   Farrow, Roger   Assignee: Nlight inc   IPC: G02F1/01 Abstract: Systems and methods for modifying an optical beam and adjusting one or more beam characteristics of an optical beam are provided. The system may include a first length of fiber operably coupled with an optical beam source and configured to receive an optical beam therefrom. The system may also include a perturbation device operably coupled with the first length of fiber and configured to modify the optical beam traversing therethrough, and a second length of fiber operably coupled with the first length of fiber and configured to receive the modified optical beam therefrom. The system may further include a beam shaping assembly configured to receive the modified optical beam from the second length of fiber, adjust one or more beam characteristics of the modified optical beam, and direct the adjusted optical beam to a downstream process.
20 US10684487B2
Frequency-converted optical beams having adjustable beam characteristics
Publication/Patent Number: US10684487B2 Publication Date: 2020-06-16 Application Number: 15/939,223 Filing Date: 2018-03-28 Inventor: Victor, Brian   Bell, Jacob L.   Kliner, Dahv A. V.   Farrow, Roger   Assignee: Nlight inc   IPC: G02B27/09 Abstract: An optical beam delivery system, includes: an optical beam source; a fiber assembly situated to receive and modify one or more beam characteristics of an optical beam; and a nonlinear frequency-conversion stage in optical communication with the fiber assembly and situated to receive and frequency-convert an optical beam from a first wavelength to one or more second wavelengths. The fiber assembly includes: a first length of fiber comprising a first RIP formed to enable modification of the one or more beam characteristics of the optical beam by a perturbation device, and a second length of fiber having a second RIP coupled to the first length of fiber, the second RIP formed to confine at least a portion of modified beam characteristics of the optical beam within one or more confinement regions. The first RIP and the second RIP are different.