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    ANTI-REFLECTION COATED PUMP DUMPS
    2.
    发明申请
    ANTI-REFLECTION COATED PUMP DUMPS 审中-公开

    公开(公告)号：US20190140414A1

    公开(公告)日：2019-05-09

    申请号：US16057288

    申请日：2018-08-07

    申请人： Shaheed Rahim ,  Jason E. Langseth

    发明人： Shaheed Rahim ,  Jason E. Langseth

    IPC分类号： H01S3/06 ,  H01S3/067 ,  H01S3/00 ,  H01S3/091

    摘要： A pump dump or cladding mode stripper is used to remove unwanted light from the cladding of an optical fiber. Conventional pump dumps include high-index polymer coatings and roughened cladding outer surfaces. Unfortunately, high-index polymer coatings absorb the stripped light, so they melt or burn at high optical powers, and roughening the cladding's outer surface makes the fiber too brittle for many applications. Fortunately, it is possible to frustrate total internal reflection at the interface between the cladding and air by texturing the cladding's outer surface with irregularly distributed, shaped, and size features that are less than a micron in size. These features don't absorb light and are too small to make the fiber brittle, yet they still cause incident pump light to exit the optical fiber. These qualities make them suitable for dumping high-power pump beams from the claddings of fiber amplifiers and fiber lasers.

    SBS Suppression and Electronic Path Length Matching in Coherent Beam Combining
    3.
    发明申请
    SBS Suppression and Electronic Path Length Matching in Coherent Beam Combining 有权

    公开(公告)号：US20210351559A1

    公开(公告)日：2021-11-11

    申请号：US17195115

    申请日：2021-03-08

    申请人： Jason E. Langseth ,  Andrew Benedick ,  Seth TROTZ

    发明人： Jason E. Langseth ,  Andrew Benedick ,  Seth TROTZ

    IPC分类号： H01S3/23 ,  H01S3/13

    摘要： In coherent beam combining, the beams can be phase-modulated with a pseudo-random bit sequence (PRBS) to prevent stimulated Brillouin scattering (SBS) downstream. To coherently combine the phase-modulated beams, however, the PRBS waveforms should be true-time-delayed to within a small fraction of the bit duration. Traditionally, this true time delay is achieved by cutting optical fibers to length or with optical trombones. But trimming fibers is hard to do precisely, and optical trombones have large insertion loss. In addition, the path length mismatch varies as the fibers heat up and/or vibrate. Here, the beams are generated from a kilohertz linewidth seed split among N>1 (e.g., N=100) arms. Each arm is phase-modulated with a separate copy of the unique PRBS pattern. The relative phase of the PRBS patterns is stabilized by phase-locking the master oscillators used to read out the PRBS patterns. The PRBS patterns can be phase shifted with respect to one another to compensate for physical path length mismatches of the optical fibers. Scanning the relative phase of the PRBS pattern used to modulate different arms yields a cross-correlation peak in combined power when the phases are matched at the combination plane.

    All glass fiber laser cladding mode stripper
    4.
    发明授权
    All glass fiber laser cladding mode stripper 有权
    所有玻璃纤维激光包层模式剥离器

    公开(公告)号：US08433161B2

    公开(公告)日：2013-04-30

    申请号：US12886924

    申请日：2010-09-21

    申请人： Jason E. Langseth ,  Alexander E. Mandl

    发明人： Jason E. Langseth ,  Alexander E. Mandl

    IPC分类号： G02B6/26

    CPC分类号： G02B6/14 ,  H01S3/0407 ,  H01S3/042 ,  H01S3/06708 ,  H01S3/06729 ,  H01S3/094007 ,  H01S3/1618

    摘要： A system configured to generate an optical beam from a fiber laser is presented. The system includes a fiber gain medium having a core and a cladding, the core being configured to convert radiation from a pump beam into an output beam, the cladding having a mode propagating section and a mode stripping section bounded on a near end and a distal end by the mode propagating section, the mode stripping section of the cladding being configured to scatter excess pump radiation received from the mode propagating section in a substantially outwardly radial direction. The system also includes a rigid support member into which the fiber gain medium is placed, the rigid support member completely encompassing the mode stripping section of the cladding and joined to the fiber at the mode propagating section of the cladding.

    摘要翻译： 提出了一种被配置为从光纤激光器产生光束的系统。 该系统包括具有芯和包层的光纤增益介质，该芯被配置为将来自泵浦光束的辐射转换成输出光束，该包层具有模式传播部分和在近端和远端 通过模式传播部分结束，包层的模式剥离部分被配置成在基本向外的径向方向上散射从模式传播部分接收的多余的泵浦辐射。 该系统还包括刚性支撑构件，纤维增益介质放置在该刚性支撑构件中，刚性支撑构件完全包围包层的模式剥离部分并且在包层的模式传播部分处连接到纤维。

    ALL GLASS FIBER LASER CLADDING MODE STRIPPER
    5.
    发明申请
    ALL GLASS FIBER LASER CLADDING MODE STRIPPER 有权
    所有玻璃纤维激光切割模式剥皮机

    公开(公告)号：US20120070115A1

    公开(公告)日：2012-03-22

    申请号：US12886924

    申请日：2010-09-21

    申请人： Jason E. Langseth ,  Alexander E. Mandl

    发明人： Jason E. Langseth ,  Alexander E. Mandl

    IPC分类号： G02B6/26 ,  G02B6/02

    CPC分类号： G02B6/14 ,  H01S3/0407 ,  H01S3/042 ,  H01S3/06708 ,  H01S3/06729 ,  H01S3/094007 ,  H01S3/1618

    摘要： A system configured to generate an optical beam from a fiber laser is presented. The system includes a fiber gain medium having a core and a cladding, the core being configured to convert radiation from a pump beam into an output beam, the cladding having a mode propagating section and a mode stripping section bounded on a near end and a distal end by the mode propagating section, the mode stripping section of the cladding being configured to scatter excess pump radiation received from the mode propagating section in a substantially outwardly radial direction. The system also includes a rigid support member into which the fiber gain medium is placed, the rigid support member completely encompassing the mode stripping section of the cladding and joined to the fiber at the mode propagating section of the cladding.

    摘要翻译： 提出了一种被配置为从光纤激光器产生光束的系统。 该系统包括具有芯和包层的光纤增益介质，该芯被配置为将来自泵浦光束的辐射转换成输出光束，该包层具有模式传播部分和在近端和远端 通过模式传播部分结束，包层的模式剥离部分被配置成在基本向外的径向方向上散射从模式传播部分接收的多余的泵浦辐射。 该系统还包括刚性支撑构件，纤维增益介质放置在该刚性支撑构件中，刚性支撑构件完全包围包层的模式剥离部分并且在包层的模式传播部分处连接到纤维。