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    Manufacturing technique of ultra-wideband high gain optical fibers and devices
    2.
    发明授权
    Manufacturing technique of ultra-wideband high gain optical fibers and devices 有权

    公开(公告)号：US10608399B1

    公开(公告)日：2020-03-31

    申请号：US16266942

    申请日：2019-02-04

    Applicant: South China University of Technology

    Inventor： Zhongmin Yang ,  Guowu Tang ,  Zhishen Zhang

    IPC: H01S3/094 ,  H01S3/067

    Abstract: A manufacturing technique of ultra-wideband high gain optical fibers and devices is disclosed, including: (1) manufacturing a gain fiber, which is a composite structural optical fiber, having a core composed of a plurality of sets of sector structures distributed symmetrically or a plurality of concentric ring structures. The core is composed of at least two kinds of rare-earth-ion-doped glass, and luminescence centers are located in different sector or ring structure regions; and (2) constructing a fiber laser: using the gain fiber, selectively exciting rare earth ions in different regions in the core by controlling a shape of pump light spot, and combining with fiber grating pairs to realize a tunable laser output. The present disclosure can manufacture gain fibers with high-gain and ultra-wideband characteristics by combining the design of the fiber structure and the control of the light field of the pump light.

    All-fiber optical vortex laser based on resonance of orbital angular momentum modes
    3.
    发明授权
    All-fiber optical vortex laser based on resonance of orbital angular momentum modes 有权

    公开(公告)号：US12015235B2

    公开(公告)日：2024-06-18

    申请号：US17266114

    申请日：2018-10-31

    Applicant: SOUTH CHINA UNIVERSITY OF TECHNOLOGY

    Inventor： Jiulin Gan ,  Zhongmin Yang ,  Xiaobo Heng ,  Zhishen Zhang

    IPC: H01S3/00 ,  H01S3/067

    CPC classification number: H01S3/06783 ,  H01S3/06712 ,  H01S3/06716 ,  H01S3/06791

    Abstract: Disclosed is an all-fiber optical vortex laser based on resonance of orbital angular momentum modes. The all-fiber optical vortex laser has an annular cavity structure, and includes a narrow-linewidth pump laser, an optical amplifier, an orbital angular momentum mode generator, a first polarization controller, an optical fiber circulator, an optical fiber coupler, a second polarization controller and a vortex optical fiber. The orbital angular momentum mode generator (3) realizes directional conversion from a fundamental transverse mode in a single-mode optical fiber into an orbital angular momentum mode with a specific topological charge in a vortex optical fiber. The optical fiber coupler can realize directional coupling from an orbital angular momentum mode in one vortex optical fiber to an orbital angular momentum mode in another vortex optical fiber; the vortex optical fiber is an optical fiber supporting stable transmission of an orbital angular momentum mode.

    A Transverse Mode Switchable All-Fiber High-Order Mode Brillouin Laser
    4.
    发明申请
    A Transverse Mode Switchable All-Fiber High-Order Mode Brillouin Laser 有权

    公开(公告)号：US20210234330A1

    公开(公告)日：2021-07-29

    申请号：US15734648

    申请日：2018-10-16

    Applicant: South China University of Technology

    Inventor： Jiulin Gan ,  Xiaobo Heng ,  Zhongmin Yang ,  Zhishen Zhang

    IPC: H01S3/30 ,  H01S3/08 ,  H01S3/094 ,  H01S3/067

    Abstract: The present invention discloses a transverse mode switchable all-fiber high-order mode Brillouin laser. The laser comprises a narrow linewidth pump laser, an optical amplifier, a 1×N optical switch (N≥2), a fiber mode selection coupler group, a first polarization controller, a fiber circulator, a fiber coupler, a second polarization controller, and a few-mode fiber. Based on the Brillouin nonlinear gain of a few-mode fiber in a ring cavity, the present invention realizes the resonance amplification of a specific order transverse mode in the cavity, and obtains the transverse mode switchable high-order mode laser beam output. The present invention, adopting an all-fiber structure, has the advantages of simple structure, low cost, easy fiber system integration, high stability and narrow linewidth of outputted laser beams, etc., and improves the practicality and reliability of high-order mode lasers.

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