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    SINGLE MODE HIGH POWER FIBER LASER SYSTEM
    5.
    发明公开
    SINGLE MODE HIGH POWER FIBER LASER SYSTEM 审中-公开
    单模式高性能光纤激光器系统

    公开(公告)号：EP2417677A2

    公开(公告)日：2012-02-15

    申请号：EP10835130.5

    申请日：2010-12-02

    申请人： IPG Photonics Corporation

    发明人： GAPONTSEV, Valentin ,  FOMIN, Valentin ,  PLATANOV, Nikolai ,  VYATKIN, Michael

    IPC分类号： H01S3/067 ,  G02B6/02

    CPC分类号： H01S3/06745 ,  H01S3/0672 ,  H01S3/06729 ,  H01S3/06754 ,  H01S3/08045 ,  H01S3/094019 ,  H01S3/094053 ,  H01S3/1608 ,  H01S3/1618

    摘要： A high power single mode fiber laser system is configured with an active fiber including co extending multimode core (MM) and cladding around the MM core. The MM core is doped with one or more ions selected from rare earth and transitional metals and has a bottleneck cross in accordance with one aspect of the disclosure. The bottleneck cross- section includes a relatively small uniformly dimensioned input end region, a frustoconical region and a relatively large uniformly dimensioned amplifying region. The refractive step index of the MM core is configured with a central dip shaped and dimensioned along the input region so as not to disturb a Gaussian field profile of fundamental mode, gradually transform the Gaussian field profile into the ring profile of the fundamental mode and support the latter along the amplifying region. In accordance with a further aspect, the core is further provided with an output transforming region with the dip which gradually shapes the ring field profile in the Gaussian field profile further distortlessly supported by the output end region. A variety of end and side pumping arrangements are employed with the structures configured in accordance with the first and second aspects.

    LASER PROCESS HEAD
    9.
    发明授权
    LASER PROCESS HEAD 有权
    激光加工头

    公开(公告)号：EP3148016B1

    公开(公告)日：2018-02-28

    申请号：EP16196512.4

    申请日：2010-11-23

    申请人： IPG Photonics Corporation

    发明人： GAPONTSEV, Valentin ,  GRAPOV, Yuri ,  DIGIANTOMMASO, Michael

    IPC分类号： H01S3/067 ,  H01S3/10 ,  B23K26/30 ,  B23K26/14 ,  B23K26/70

    CPC分类号： G01N21/958 ,  B23K26/1462 ,  B23K26/706 ,  B23K26/707

    摘要： The disclosure refers to a laser process head having an optical protective component to be used in a laser system for monitoring the condition of the optical protective component. To facilitate replacement of the optical protective component the optical protective component is pivotally mounted to a downstream end of a housing of the laser head along a light path. The optical protective component comprises an optical fiber proximate a periphery of the optical protective component, the optical fiber is configured to receive return light which includes at least a portion of light backreflected from the worksite along the light path and a sensor optically coupled to the optical fiber and operative to determine a measure of a light power of the return light, wherein the protective component is pivotally displaced to an open position thereof for further replacement if the measured light power of the return light exceeds a reference value.