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    Ultra high power single mode fiber laser system
    4.
    发明授权
    Ultra high power single mode fiber laser system 有权
    超高功率单模光纤激光系统

    公开(公告)号：US09306364B2

    公开(公告)日：2016-04-05

    申请号：US14464337

    申请日：2014-08-20

    申请人： IPG PHOTONICS CORPORATION

    发明人： Valentin Gapontsev ,  Igor Samartsev

    IPC分类号： H01S3/00 ,  H01S3/094 ,  H01S3/067 ,  H01S3/16

    CPC分类号： H01S3/094042 ,  H01S3/06745 ,  H01S3/06754 ,  H01S3/094011 ,  H01S3/094069 ,  H01S3/1618

    摘要： An ultra-high power fiber laser system includes a single-piece fiber booster configured with fiber and straight short rod fiber portions which have in common a core configured with a numerical aperture≧0.1. The rod fiber portion has a length≦a few tens of centimeters and has a frustoconical cross-section expanding from the uniformly configured fiber portion. The core extending along the fiber portion supports a single mode (SM) or very low number of HOMs, whereas the large-diameter end of the frustoconical core portion supports a fundamental mode and high order multiple modes. The disclosed booster is energized by a pump source configured to emit pump light with such a density that while amplification of the fundamental mode continues in the central area of the core, a peripheral non-overlapped area of the core is bleached. The disclosed booster emits signal light in substantially a fundamental mode.

    摘要翻译： 一种超高功率光纤激光器系统，其特征在于，具有由纤维和直短杆纤维部分构成的单片式光纤增强器，共同构成数值孔径≥0.1的芯。 棒状纤维部分具有长度为几十厘米的长度，并且具有从均匀构造的纤维部分扩展的截头圆锥形横截面。 沿着纤维部分延伸的芯部支持单模（SM）或非常低数量的HOM，而截头圆锥形芯部分的大直径端支撑基模和高阶多模。 所公开的增压器由配置成以这样的密度发射泵浦光的泵浦电源来激励，即当基本模式的放大在芯的中心区域继续时，芯的外围非重叠区域被漂白。 所公开的增强器以基本上基本模式发射信号光。

    HIGH POWER METAL CLAD MODE ABSORBER
    5.
    发明申请
    HIGH POWER METAL CLAD MODE ABSORBER 有权
    高功率金属压模模式吸收器

    公开(公告)号：US20150370009A1

    公开(公告)日：2015-12-24

    申请号：US14308357

    申请日：2014-06-18

    申请人： IPG PHOTONICS CORPORATION

    发明人： Valentin Gapontsev ,  Valentin Fomin ,  Mikhail Abramov ,  Anton Ferin

    IPC分类号： G02B6/036 ,  H01S3/067 ,  G02B6/02

    CPC分类号： G02B6/036 ,  G02B5/003 ,  G02B6/02033 ,  G02B6/0208 ,  G02B6/14 ,  G02B6/243 ,  G02B2006/12126 ,  H01S3/005 ,  H01S3/0064 ,  H01S3/067 ,  H01S3/06754 ,  H01S3/094007

    摘要： A clad absorber unit is provided on a passive fiber of a high power fiber laser system and operative to trap and remove high order modes propagating along the clad of the passive fiber. The mode absorber has a composition made from one or more liquid metals and alloys thereof which are placed in the opening formed in the sheath of the passive fiber. The composition is configured to remove from the cladding the MM light having a predetermined light power which heats the composition at a temperature lower than a threshold temperature at which the absorber may be damaged.

    摘要翻译： 在大功率光纤激光系统的无源光纤上设置包层吸收单元，并且可操作地捕获和去除沿着被动光纤的包层传播的高阶模。 模式吸收器具有由一种或多种液态金属及其合金制成的组合物，其被放置在形成在无源光纤的护套中的开口中。 该组合物构造成从包层移除具有预定光功率的MM光，其在低于吸收器可能损坏的阈值温度的温度下加热组合物。

    HAND MANEUVERABLE WELDING GUN
    8.
    发明申请
    HAND MANEUVERABLE WELDING GUN 审中-公开
    手动焊接枪

    公开(公告)号：US20150266130A1

    公开(公告)日：2015-09-24

    申请号：US14688555

    申请日：2013-10-21

    申请人： IPG PHOTONICS CORPORATION ,  VOLKSWAGEN AKTIENGESELLSCHAFT

    发明人： Valentin Fomin ,  Anton Starovoytov ,  Andrey Abramov ,  Valentin Gapontsev ,  Artjom Fuchs ,  Ingo Schramm ,  Eugene Shcherbakov ,  Holger Mamerow ,  Andreas Michalzik

    IPC分类号： B23K26/00 ,  B23K26/08 ,  B23K26/14 ,  B23K26/24 ,  B23K26/30

    CPC分类号： B23K26/0096 ,  B23K26/032 ,  B23K26/082 ,  B23K26/142 ,  B23K26/22 ,  B23K26/24 ,  B23K26/705

    摘要： 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 axially 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 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 to the optical head.

    摘要翻译： 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，同时在其上轴向地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。 当流流出时，它们将在隧道内流动的焊接碎片进行到光学头。

    HIGH POWER FIBER LASER SYSTEM WITH DISTRIBUTIVE MODE ABSORBER
    9.
    发明申请
    HIGH POWER FIBER LASER SYSTEM WITH DISTRIBUTIVE MODE ABSORBER 有权
    具有分布式模式吸收器的高功率光纤激光系统

    公开(公告)号：US20140362877A1

    公开(公告)日：2014-12-11

    申请号：US14308407

    申请日：2014-06-18

    申请人： IPG PHOTONICS CORPORATION

    发明人： Valentin Gapontsev ,  Valentin FOMIN ,  Mikhail ABRAMOV ,  Anton FERIN

    IPC分类号： H01S3/067 ,  G02B6/14 ,  G02B6/036

    CPC分类号： H01S3/06708 ,  G02B6/14 ,  G02B6/2813 ,  H01S3/06745 ,  H01S3/06754 ,  H01S3/0804 ,  H01S3/094007 ,  Y10T156/11

    摘要： A clad absorber unit is provided on a passive fiber of a high power fiber laser system and operative to trap and remove modes propagating along the waveguide clad of the fiber. The mode absorber is configured with such an optimal length that the clad light may be removed in a localized manner, substantially uniformly removed over the entire length thereof. The absorber removing clad light in a unformed fashion includes a host material impregnated with diffusers.

    摘要翻译： 在高功率光纤激光器系统的无源光纤上设置包层吸收单元，用于捕获和去除沿着光纤的波导包层传播的模式。 模式吸收体配置有这样一个最佳长度，使得可以以局部方式去除包层光，在其整个长度上基本均匀地移除。 吸收剂去除包覆光以未成型的方式包括浸渍有扩散器的主体材料。

    Ultra-high power single mode green fiber laser operating in continuous wave and quasi-continuous wave regimes
    10.
    发明授权
    Ultra-high power single mode green fiber laser operating in continuous wave and quasi-continuous wave regimes 有权

    公开(公告)号：US10520790B2

    公开(公告)日：2019-12-31

    申请号：US14590752

    申请日：2015-01-06

    申请人： IPG PHOTONICS CORPORATION

    发明人： Valentin Gapontsev ,  Igor Samartsev ,  Alexey Avdokhin

    IPC分类号： G02F1/37 ,  G02F1/35 ,  H01S3/10 ,  H01S3/13 ,  H01S3/067 ,  H01S3/00 ,  H01S3/16

    摘要： A single-mode (SM) Green fiber laser is configured to operate in a Green spectral range in a continuous-wave (CW) or quasi-continuous-wave (QCW) mode. The Green laser is configured with a pump source, outputting narrow-linewidth pump light at a fundamental wavelength in one (1) micrometer spectral range, and a single-pass second harmonic generator (SHG), such as a nonlinear LBO crystal, frequency doubling the pump light to output Green light at a signal wavelength. The pump light source is configured to have a MOPFA configuration with a SM seed which emits the SM pump light with a linewidth narrower than 0.2 nm, and at least one ytterbium (“Yb”) fiber amplifier receiving and amplifying the SM pump light at the fundamental wavelength while maintaining the linewidth narrower than 0.2 nm. The SM Green fiber laser operates with a wall plug efficiency between 15% and 30% in a 510-540 nm signal wavelength range and a power range between about 50 W and kW-levels.