公开(公告)号：WO2014063151A1

公开(公告)日：2014-04-24

申请号：PCT/US2013/065924

申请日：2013-10-21

Applicant: IPG PHOTONICS CORPORATION ,  VOLKSWAGEN AKTIENGESELLSCHAFT

Inventor： FOMIN, Valentin ,  STAROVOYTOV, Anton ,  ABRAMOV, Andrey ,  GAPONTSEV, Valentin ,  FUCHS, Artjom ,  SCHRAMM, Ingo ,  SCHERBAKOV, Eugene ,  MAMEROW, Holger ,  MICHALZIK, Andreas

IPC: B23K26/24

CPC classification number: B23K26/0096 ,  B23K26/032 ,  B23K26/082 ,  B23K26/142 ,  B23K26/22 ,  B23K26/24 ,  B23K26/705

Abstract: A hand displaceable laser welding gun is configured with an elongated support column extending along a longitudinal axis and made from lightweight material. A support plate is displaceably mounted to the column while supporting thereon an optical head which is provided with beam-guiding optics. The optics is configured to direct a laser beam along a path towards a welding zone through a protective window of the optical head. The laser welding gun further is structured with a first arm mounted to the support plate and extending along a longitudinal axis of the gun diametrically opposite to the optical head. The inner surface of the displaceable arm has an inner surface defining a tunnel which is aligned with the optical head and axially traversed by the laser beam, a first axially flowing stream of pressurized gaseous medium, and a second axially flowing stream of gaseous medium. The second stream, entering the tunnel at a pressure lower than that one of the first stream in response to a pressure gradient generated in the column, does not generate vortexes within the column. The first and second streams exit through the downstream end of the tunnel next to the welding zone. As the streams flow out, they carry out welding debris flowing within the tunnel before the debris reach the protective window of the optical head.

Abstract translation: 手可移动激光焊枪配置有沿着纵向轴线延伸并由轻质材料制成的细长支撑柱。 支撑板可移动地安装到柱上，同时在其上支撑设置有光束引导光学器件的光学头。 光学器件被配置为沿着通过光学头的保护窗口的焊接区域的路径引导激光束。 激光焊枪还具有安装到支撑板并沿着与光学头直径相对的枪的纵向轴线延伸的第一臂。 可移动臂的内表面具有限定隧道的内表面，其与光学头对准并且被激光束轴向穿过，第一轴向流动的加压气体介质流和第二轴向流动的气体介质流。 响应于塔中产生的压力梯度，第二流以比第一流低的压力进入隧道，不会在塔内产生涡流。 第一和第二物流通过邻近焊接区的隧道的下游端部流出。 当流流出时，它们在碎屑到达光学头的保护窗口之前，在隧道内进行焊接碎屑流动。

公开(公告)号：WO2016200621A2

公开(公告)日：2016-12-15

申请号：PCT/US2016/034354

申请日：2016-05-26

Applicant: IPG PHOTONICS CORPORATION

Inventor： SCHERBAKOV, Eugene ,  FOMIN, Valentin ,  ABRAMOV, Andrey ,  YAGODKIN, Dimitri ,  MAMEROW, Holger

IPC: B23K26/21 ,  B23K26/067 ,  B23K26/70

CPC classification number: B23K26/067 ,  B23K26/0604 ,  B23K26/21 ,  B23K26/22 ,  B23K26/24 ,  B23K26/32 ,  B23K26/322 ,  B23K2201/006 ,  B23K2201/18 ,  B23K2201/34 ,  B23K2203/04 ,  B23K2203/10 ,  G02B6/26

Abstract: The present invention provides a multi-fiber laser output system that delivers at least three fiber outputs arranged in a circumferential pattern or otherwise at least four distinct laser outputs from a single processing cable. The present invention allows for controlling the at least three laser modules and delivering their respective outputs in a pre-determined sequence in a single processing cable, thereby providing multiple processing steps on a work piece that heretofore required separate optics for each beam. The at least three laser outputs are optimized for use in creating spot welds, seam welds or virtual wobble welds when used for seam welding.

Abstract translation: 本发明提供了一种多光纤激光输出系统，其传送以圆周图案布置的至少三个光纤输出或者从单个处理电缆输送至少四个不同的激光输出。 本发明允许控制至少三个激光模块并且以预定的顺序在单个处理电缆中传送它们各自的输出，由此在工件上提供多个处理步骤，其迄今为每个光束需要单独的光学器件。 当用于缝焊时，至少有三个激光输出被优化用于产生点焊，缝焊或虚拟摆动焊缝。

公开(公告)号：WO2015084854A1

公开(公告)日：2015-06-11

申请号：PCT/US2014/068172

申请日：2014-12-02

Applicant: IPG PHOTONICS CORPORATION

Inventor： GAPONTSEV, Valentin ,  FOMIN, Valentin ,  SCHERBAKOV, Eugene ,  OVTCHINNIKOV, Alex ,  FERIN, Anton ,  ABRAMOV, Andrey

IPC: H01S3/067

CPC classification number: H01S3/0675 ,  H01S3/094069 ,  H01S3/0941 ,  H01S3/1618

Abstract: The inventive laser is configured with a plurality of pigtailed multimode (MM) diode lasers each receiving a direct input current at a room temperature which is maintained to be within a 20-25° C inside the housing of the laser. The diode lasers each are configured to operate at a desired wavelength in an optimal operational range, in which the diode laser operates with a WPE range between 63% and 75%. The direct current inputted in each diode laser is selected to be below a threshold at an efficiency curve of the diode laser after which the efficiency of the diode laser starts decreasing while an output power of the diode laser continues to increase. The laser is further configured with a fiber gain block having an active fiber medium which is pumped with the cumulative pump output and operative to emit a laser output in a power range between hundreds of watts and tens and even hundreds of kilowatts at the desired wavelength in an optimal operation range. The optimal operational ranges of respective MM diode lasers and fiber gain block are matched to achieve a superposition of respective efficiency maximums providing an overall maximum system efficiency up to 55%.

Abstract translation: 本发明的激光器配置有多个尾纤多模（MM）二极管激光器，其每个都接收室温下的直接输入电流，该激光器保持在激光器壳体内的20-25℃内。 二极管激光器被配置为在最佳工作范围内以期望的波长工作，其中二极管激光器以63％至75％之间的WPE范围工作。 在二极管激光器的效率曲线下，输入到每个二极管激光器中的直流电流选择为低于阈值，之后二极管激光器的效率开始下降，同时二极管激光器的输出功率继续增加。 激光器进一步配置有具有有源光纤介质的光纤增益块，该有源光纤介质利用累积泵浦输出被泵浦，并且可操作以在所需波长的数百瓦特和几十千瓦之间的功率范围内发射激光输出 最佳操作范围。 匹配相应MM二极管激光器和光纤增益块的最佳工作范围，以实现各自效率最大值的叠加，从而提供高达55％的总体最大系统效率。

公开(公告)号：WO2014035505A2

公开(公告)日：2014-03-06

申请号：PCT/US2013/043007

申请日：2013-05-29

Applicant: IPG PHOTONICS CORPORATION ,  FOMIN, Valentin ,  ABRAMOV, Andrey ,  MASHKIN, Andrei

Inventor： FOMIN, Valentin ,  ABRAMOV, Andrey ,  MASHKIN, Andrei

CPC classification number: G01J1/4257 ,  G01J1/0411 ,  G01J1/0422 ,  G01J1/0425

Abstract: A sensor unit for detecting Rayleigh scattering of laser light, guided in a fiber along a light path, is configured with a holder. The holder has a U- shaped recess centered along an axis which extends transversely to the light path. The curved bottom of the recess has a matte reflective surface and is configured with such a radius of curvature that Rayleigh scattered light indicated on the bottom is collected in a focal plane of a light input window of a meter coaxial with the recess. The reflected amount of the Rayleigh scattering on the light input window is sufficient to provide a measurement data which deviates from a reference value at no more than about ±3%.

Abstract translation: 用于检测沿着光路在光纤中引导的激光的瑞利散射的传感器单元配置有保持器。 支架具有沿着横向于光路延伸的轴线居中的U形凹部。 凹部的弯曲底部具有无光泽反射表面并且被构造成具有这样的曲率半径，使得在底部上指示的瑞利散射光被收集在与凹部同轴的仪表的光输入窗口的焦平面中。 在光输入窗口上的瑞利散射的反射量足以提供不超过约±3％的偏离参考值的测量数据。

公开(公告)号：WO2018005927A1

公开(公告)日：2018-01-04

申请号：PCT/US2017/040213

申请日：2017-06-30

Applicant: IPG PHOTONICS CORPORATION

Inventor： MASHKIN, Andrey ,  FOMIN, Valentin ,  SHCHERBINA, Fedor ,  DRONOV, Alexander ,  ABRAMOV, Andrey ,  MIRONOV, Vadim

IPC: H01S3/067

Abstract: A method of inducing light losses at a parasitic wavelength in a fiber laser system includes providing a wavelength discriminator (WD) spaced from and between feeding and process fibers or from the end output of the feeding fiber so as to induce losses of light at parasitic wavelength. The device implementing the disclosed method is configured with a laser source, the delivery fiber and WD spaced at a distance between the surface to be treated and the end of the delivery fiber, wherein the WD receives the parasitic light over free space and is configured as a dichroic filter inducing losses to the light at the parasitic wavelength.

Abstract translation: 在光纤激光器系统中引起寄生波长的光损耗的方法包括提供与馈送和处理光纤或从馈送光纤的端部输出隔开的波长鉴别器（WD），以便 以诱导寄生波长的光损失。 实施所公开的方法的装置配置有激光源，输送光纤和WD在待处理表面与输送光纤的端部之间间隔开，其中WD在自由空间上接收寄生光并且被配置为 一个二向色滤光片，在寄生波长处对光线造成损失。

公开(公告)号：WO2014063153A1

公开(公告)日：2014-04-24

申请号：PCT/US2013/065930

申请日：2013-10-21

Applicant: IPG PHOTONICS CORPORATION

Inventor： FOMIN, Valentin ,  STAROVOYTOV, Anton ,  ABRAMOV, Andrey ,  GAPONTSEV, Valentin ,  FUCHS, Artjom ,  SCHRAMM, Ingo ,  SCHERBAKOV, Eugene ,  MAMEROW, Holger

IPC: B23K26/08 ,  B23K26/24 ,  B23K26/00 ,  B23K26/02

CPC classification number: B23K26/0884 ,  B23K26/032 ,  B23K26/0626 ,  B23K26/142 ,  B23K26/1462 ,  B23K26/22

Abstract: A robotically operated laser seam stepper is configured with an elongated support column extending along a longitudinal axis and made from lightweight material. A support plate is displaceably mounted to the column while supporting thereon an optical head which is provided with optics. The optics is configured to direct a laser beam along a path towards a welding zone through a protective window of the optical head. The laser seam stepper further is structured with a first arm mounted to the support plate and extending along a longitudinal axis of the stepper diametrically opposite to the optical head. The inner surface of the displaceable arm defines a tunnel which is aligned with the optical head and axially traversed by the laser beam, a first axially flowing stream of pressurized gaseous medium, and by a second axially flowing stream of gaseous medium. The second stream, entering the tunnel at a pressure lower than that one of the first stream in response to a pressure gradient generated in the column, does not generate vortexes within the column. The first and second streams exit through the downstream end of the tunnel next to the welding zone. As the streams flow out, they carry out welding debris from the tunnel.

Abstract translation: 机器人操作的激光缝步进器配置有沿着纵向轴线延伸并由轻质材料制成的细长支撑柱。 支撑板可移动地安装到柱上，同时在其上支撑设置有光学元件的光学头。 光学器件被配置为沿着通过光学头的保护窗口的焊接区域的路径引导激光束。 激光焊缝步进器进一步构造成具有安装到支撑板并沿着与光学头径向相反的步进器的纵向轴线延伸的第一臂。 可移动臂的内表面限定了与光学头对准并且被激光束轴向移动的通道，第一轴向流动的加压气体介质流和第二轴向流动的气体介质流。 响应于在塔中产生的压力梯度，以比第一流低的压力进入隧道的第二流不会在塔内产生涡流。 第一和第二物流通过隧道的下游端离开焊接区旁边。 当溪流流出时，它们从隧道中进行焊接碎屑。

公开(公告)号：WO2014134173A1

公开(公告)日：2014-09-04

申请号：PCT/US2014/018688

申请日：2014-02-26

Applicant: IPG PHOTONICS CORPORATION

Inventor： FOMIN, Valentin ,  MOCHALOV, Dmitry ,  ABRAMOV, Andrey

IPC: G02B6/26 ,  G02B6/40

CPC classification number: G02B6/2856 ,  G02B6/4296

Abstract: An ultra-high power fiber laser system includes a multimode combiner which is configured with a plurality of low mode fibers bundled together and tapering toward its downstream end. The system further includes a clad mode absorber extending along the tapered downstream end of the combiner and extending over a portion of the combiner's output fiber. The absorber is configured with sequentially located zones which are provided with respective refractive indices. In a forward propagating direction of light signal, the upstream zone includes polymeric material with the refractive index higher than that of the cladding of the combiner end fiber. This zone is configured to remove the back reflected core guided light bled into the cladding of the combiner through a splice between combiner end and output fibers. The intermediate zone includes polymeric material configured with a refractive index lower than that of the cladding of the combiner output fiber so it can prevent clad guided signal light from decoupling the cladding under the material. The downstream zone is configured with, polymeric material having a refractive index lower than that of the cladding of the combiner output fiber. The polymeric material of the downstream zone is impregnated with a plurality of light diffusers scattering high numerical aperture rays of the clad-guided signal light.

Abstract translation: 超高功率光纤激光器系统包括多模组合器，其配置有多个低模式光纤，其捆绑在一起并朝着其下游端逐渐变细。 该系统还包括沿着组合器的锥形下游端延伸并在组合器的输出光纤的一部分上延伸的包层模式吸收体。 吸收器配置有具有相应折射率的顺序定位的区域。 在光信号的向前传播方向上，上游区域包括折射率高于组合器端纤维包层的折射率的聚合材料。 该区域被配置为通过组合器端部和输出光纤之间的接合将经反射的芯引导光移除到组合器的包层中。 中间区域包括被配置为折射率低于组合器输出光纤的包层的折射率的聚合物材料，因此可以防止包层引导信号光使材料之下的包层解耦。 下游区域配置有折射率低于组合器输出光纤的包层的折射率的聚合材料。 下游区域的聚合物材料浸渍有散射包层引导信号光的高数值孔径光的多个光漫射器。

公开(公告)号：WO2014133904A1

公开(公告)日：2014-09-04

申请号：PCT/US2014/017784

申请日：2014-02-21

Applicant: IPG PHOTONICS CORPORATION

Inventor： FOMIN, Valentin ,  ABRAMOV, Andrey ,  MOCHALOV, Dmitry

IPC: G02B6/28 ,  H01S3/067

CPC classification number: G02B6/4296 ,  G02B6/14 ,  G02B6/262 ,  G02B6/40

Abstract: A high power fiber laser system is configured with a combiner end fiber spliced to a combiner output fiber. The system further includes a light stripper extending along the combiner end and output fibers and configured with sequentially located zones 'which are provided with respective refractive indices. In a forward propagating direction of light signal, the upstream zone includes polymeric material with the refractive index higher than that of the cladding of the combiner end fiber. This zone is configured to remove the backreflected core guided light bled into the cladding of the combiner through a splice between combiner end and output fibers. The intermediate zone includes polymeric material configured with a refractive index lower than that of the cladding of the combiner output fiber so it can prevent clad guided signal light from decoupling the cladding under the material. The downstream zone is configured with polymeric material having a refractive index lower than that of the cladding of the combiner output fiber. The polymeric material of the downstream zone is impregnated with a plurality of light diffusers scattering high numerical aperture rays of the clad-guided signal light.

Abstract translation: 高功率光纤激光器系统被配置有与组合器输出光纤接合的组合器端光纤。 该系统还包括沿着组合器端延伸并且输出光纤并且被配置有设置有相应折射率的顺序定位的区域的光剥离器。 在光信号的向前传播方向上，上游区域包括折射率高于组合器端纤维包层的折射率的聚合材料。 该区域被配置为通过组合器端部和输出光纤之间的接合将经反射的芯引导光移除到组合器的包层中。 中间区域包括被配置为折射率低于组合器输出光纤的包层的折射率的聚合物材料，因此可以防止包层引导信号光使材料之下的包层解耦。 下游区域配置有折射率低于组合器输出光纤的包层的折射率的聚合材料。 下游区域的聚合物材料浸渍有散射包层引导信号光的高数值孔径光的多个光漫射器。

公开(公告)号：WO2020117816A1

公开(公告)日：2020-06-11

申请号：PCT/US2019/064251

申请日：2019-12-03

Applicant: IPG PHOTONICS CORPORATION

Inventor： SCHERBAKOV, Eugene ,  FOMIN, Valentin ,  ABRAMOV, Andrey ,  ABRAMOV, Mikhail ,  YAGODKIN, Dmitri

IPC: H01S3/067 ,  H01S3/101 ,  H01S5/40

Abstract: The disclosed ultra-high power all fiber laser system is configured with multiple spaced apart fiber lasers outputting respective laser beams respective paths. The disclosed system is further configured with a tapered fiber-bundle including at least, one central guiding fiber and a plurality of peripheral guiding fibers. The disclosed system further has a multiclad delivery fiber configured with a double-bottle neck cross-section and provided with at least two concentric and radially spaced apart inner and outer cores. The inner core is coupled to the peripheral guiding fibers while the inner core is spliced to the central guiding fiber so that a system output emitted from the inner core of the delivery fiber has a different beam shape from the system output emitted from the outer core.

公开(公告)号：WO2020006368A1

公开(公告)日：2020-01-02

申请号：PCT/US2019/039748

申请日：2019-06-28

Applicant: IPG PHOTONICS CORPORATION

Inventor： SCHERBAKOV, Eugene ,  FOMIN, Valentin ,  ABRAMOV, Andrey ,  DORONKIN, Aleksey

IPC: H01S3/067

Abstract: An active waveguide including active and passive rods which have respective polymeric claddings mechanically and optically coupled to one another so as to define a side pumping scheme. One or a plurality of elements are embedded in one of or both active and passive rods and have a refractive index lower than the lowest of refractive indices of the respective active and passive rods at at least 1*10 -3 . The MM core of the active rod includes inner and outer concentric regions with a concentration of light emitters in the outer region being lower than that of the inner region at more than 50 % and, a radius of the inner region being at most 92 % of that of the outer region. The unabsorbed pump light at the output of the active waveguide constitutes less than 1 % of the delivered pump light which in combination with the refractive index of the embedded elements and selectively doped core regions contribute to laser efficiency of at least 86 %.