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公开(公告)号：US11870210B2
公开(公告)日：2024-01-09
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 , H01S3/067 , H01S3/0804 , H01S3/094 , H01S3/10 , H01S3/08 , H01S3/0941
CPC classification number: H01S3/302 , H01S3/06754 , H01S3/06791 , H01S3/0804 , H01S3/094003 , H01S3/1001 , H01S3/1003 , H01S3/08013 , H01S3/09415 , H01S3/094065 , H01S3/10061
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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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
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.
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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
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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