公开(公告)号：US11256076B2

公开(公告)日：2022-02-22

申请号：US16149712

申请日：2018-10-02

申请人： nLIGHT, Inc.

发明人： Scott R. Karlsen ,  Robert J. Martinsen ,  Keith W. Kennedy

IPC分类号： G02B19/00 ,  H01S5/00 ,  H01S5/40

摘要： A laser system capable of producing a stable and accurate high-power output beam from one or more input beams of corresponding laser sources comprises one or more optical elements configured to receive the input beams wherein at least one of said one or more optical elements is made of high purity fused silica.

公开(公告)号：US10374378B2

公开(公告)日：2019-08-06

申请号：US16158135

申请日：2018-10-11

申请人： NLIGHT, Inc.

发明人： Scott R. Karlsen ,  Walter R. Sanders

IPC分类号： H01S3/067 ,  H01S3/06 ,  G02B6/24 ,  H01S3/0941 ,  H01S3/04

摘要： A fiber laser system includes a fiber laser connector having a housing to terminate a fiber that generates a laser beam. A chamber extends internally along a length of the housing. A light trap includes a plurality of threads formed along a wall of the chamber to trap light reflected back to the fiber laser connector in response to an application of the laser beam to a workpiece.

公开(公告)号：US20170331244A1

公开(公告)日：2017-11-16

申请号：US15596924

申请日：2017-05-16

申请人： NLIGHT, Inc.

发明人： Scott R. Karlsen ,  Walter R. Sanders

IPC分类号： H01S3/067 ,  H01S3/06 ,  H01S3/04 ,  H01S3/0941

CPC分类号： H01S3/06704 ,  G02B6/24 ,  H01S3/0407 ,  H01S3/0621 ,  H01S3/0941

摘要： A fiber laser system includes a fiber laser connector having a housing to terminate a fiber that generates a laser beam. A chamber extends internally along a length of the housing. A light trap includes a plurality of threads formed along a wall of the chamber to trap light reflected back to the fiber laser connector in response to an application of the laser beam to a workpiece.

公开(公告)号：US20160209267A1

公开(公告)日：2016-07-21

申请号：US15079664

申请日：2016-03-24

申请人： nLIGHT, Inc.

发明人： Scott R. Karlsen ,  Jay Small ,  Mitch Stanek ,  Vito P. Errico ,  Cary S. Kiest

IPC分类号： G01J1/42 ,  H01S5/042 ,  H01S5/40 ,  H01S5/00

CPC分类号： G01J1/4257 ,  G01J1/0414 ,  G01J1/0437 ,  G01J1/4228 ,  H01S5/0014 ,  H01S5/042 ,  H01S5/4012 ,  H01S5/4025

摘要： A monitoring system for a multi-laser module includes detectors corresponding to each laser and situated to receive a portion of the associated laser beam uncombined with other beams. Laser characteristics are measured and stored, and in operation are used to identify device failures. A comparator receives a reference value and compares the reference value with a current operational value. If the current value is less that the reference value, a possible failure is indicated. Signal cross-coupling among the detectors is also used to identify undesirable scattering that can be associated with surface contamination or device failure.

摘要翻译： 用于多激光模块的监视系统包括对应于每个激光器并且被定位成接收未与其它光束组合的相关激光束的一部分的检测器。 激光特性被测量和存储，并且在操作中用于识别设备故障。 比较器接收参考值并将参考值与当前操作值进行比较。 如果当前值小于参考值，则指示可能的故障。 检测器之间的信号交叉耦合也用于识别可能与表面污染或器件故障相关的不期望的散射。

公开(公告)号：US20230349754A1

公开(公告)日：2023-11-02

申请号：US18138485

申请日：2023-04-24

申请人： NLIGHT, INC.

发明人： Scott R. Karlsen ,  David R. Balsley ,  Nicolas Trent Meacham ,  Austin Hagarty ,  Dahv A.V. Kliner

IPC分类号： G01J1/42 ,  G01J1/04

CPC分类号： G01J1/4257 ,  G01J1/0437 ,  G01J1/0414

摘要： Some embodiments may include a power monitor to measure power of laser light propagating in a core of an optical fiber; the power monitor to generate a sensor signal using an optical sensor having a light sensitive section with no line of sight to part of the optical fiber; wherein the sensor signal is derived from light emerging laterally from the part of the optical fiber. Other embodiments may be disclosed and/or claimed.

公开(公告)号：US11498155B2

公开(公告)日：2022-11-15

申请号：US16745242

申请日：2020-01-16

申请人： nLIGHT, Inc.

发明人： Scott R. Karlsen ,  Robert J. Martinsen

IPC分类号： B23K26/03

摘要： A scanned optical beam is divided so as to form a set of scanned subbeams. To compensate for scan errors, a portion of at least one subbeam is detected and a scan error estimated based on the detected portion. A beam scanner is controlled according to the estimated error so as to adjust a propagation direction of some or all of the set of scanned subbeams. The scanned subbeams with adjusted propagation directions are received by an f-theta lens and directed to a work piece. In typical examples, the portion of the at least one subbeam that is detected is obtained from the set of scanned subbeams prior to incidence of the scanned subbeams to the f-theta lens.

公开(公告)号：US10957541B2

公开(公告)日：2021-03-23

申请号：US16598210

申请日：2019-10-10

申请人： nLIGHT, Inc.

发明人： Robert J. Martinsen ,  Scott R. Karlsen ,  Ken Gross

IPC分类号： H01L21/268 ,  H01L21/02 ,  B23K26/00 ,  B23K26/0622 ,  B23K103/00

摘要： 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.

公开(公告)号：US20200147719A1

公开(公告)日：2020-05-14

申请号：US16745242

申请日：2020-01-16

申请人： nLIGHT, Inc.

发明人： Scott R. Karlsen ,  Robert J. Martinsen

IPC分类号： B23K26/03

摘要： A scanned optical beam is divided so as to form a set of scanned subbeams. To compensate for scan errors, a portion of at least one subbeam is detected and a scan error estimated based on the detected portion. A beam scanner is controlled according to the estimated error so as to adjust a propagation direction of some or all of the set of scanned subbeams. The scanned subbeams with adjusted propagation directions are received by an f-theta lens and directed to a work piece. In typical examples, the portion of the at least one subbeam that is detected is obtained from the set of scanned subbeams prior to incidence of the scanned subbeams to the f-theta lens.

公开(公告)号：US20190123505A1

公开(公告)日：2019-04-25

申请号：US16158135

申请日：2018-10-11

申请人： NLIGHT, Inc.

发明人： Scott R. Karlsen ,  Walter R. Sanders

IPC分类号： H01S3/067 ,  H01S3/06 ,  G02B6/24

CPC分类号： H01S3/06704 ,  B23K26/00 ,  G02B5/003 ,  G02B6/24 ,  G02B6/4293 ,  G02B6/4296 ,  H01S3/0407 ,  H01S3/0621 ,  H01S3/0941

摘要： A fiber laser system includes a fiber laser connector having a housing to terminate a fiber that generates a laser beam. A chamber extends internally along a length of the housing. A light trap includes a plurality of threads formed along a wall of the chamber to trap light reflected back to the fiber laser connector in response to an application of the laser beam to a workpiece.

公开(公告)号：US20170299875A1

公开(公告)日：2017-10-19

申请号：US15635909

申请日：2017-06-28

申请人： nLIGHT, Inc.

发明人： Scott R. Karlsen ,  David C. Senders

IPC分类号： G02B27/09 ,  G02B27/28 ,  G02B5/08

CPC分类号： G02B27/0905 ,  G02B5/04 ,  G02B5/08 ,  G02B5/1861 ,  G02B6/262 ,  G02B6/4296 ,  G02B27/0927 ,  G02B27/0944 ,  G02B27/0994 ,  G02B27/108 ,  G02B27/283 ,  G02B27/48

摘要： A line beam system includes a single-emitter light engine including a plurality of separately spaced single-emitter diode lasers, each emitter configured to emit a diode laser beam. Beam spacing optics are optically coupled to the single-emitter light engine and situated to provide propagation axes of the diode laser beams in a close-packed parallel configuration. A light pipe having a longitudinal axis is situated to provide an output beam with a homogenized intensity profile across one or more axes by receiving a close-packed, combined beam and reflecting the beam within the light pipe. Coherence reduction is produced by diffraction of a close-packed combined beam or by propagation in the light pipe.