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公开(公告)号：US11933605B2
公开(公告)日：2024-03-19
申请号：US17577315
申请日：2022-01-17
发明人： Fatih Yaman , Hussam Batshon , Shinsuke Fujisawa , Kohei Nakamura , Takanori Inoue , Eduardo Mateo Rodriguez , Yoshihisa Inada
CPC分类号： G01B11/272 , G01M11/33
摘要： Aspects of the present disclosure describe estimating/measuring core-cladding concentricity error in optical fibers. In sharp contrast to the prior art, our inventive method is based on measuring a seemingly unrelated property of fibers called guided acoustic wave Brillouin scattering (GAWBS). As we shall show and describe, by analyzing this GAWBS property we advantageously determine what level of CCCE is exhibited by the optical fiber.
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公开(公告)号：US11920975B2
公开(公告)日：2024-03-05
申请号：US17314006
申请日：2021-05-06
发明人： Ezra Ip , Yue-Kai Huang , Fatih Yaman , Shinsuke Fujisawa
IPC分类号： G01H9/00 , H04B10/071 , H04Q11/00
CPC分类号： G01H9/004 , H04B10/071 , H04Q11/0005 , H04Q11/0067 , H04Q2011/0016 , H04Q2011/0083 , H04Q2213/13191
摘要： Aspects of the present disclosure are directed to alternative repeater design(s) that advantageously improve signal-to-noise of distributed acoustic sensing (DAS) systems using coherent detection of Rayleigh backscatter in multi-span links including inline amplification that may be employed—for example—in undersea submarine systems. The repeater designs incorporate Rayleigh combine units (RCU) and Rayleigh drop units (RDU) to reduce Rayleigh backscatter loss as Rayleigh signal(s) is/are routed to a link that propagates the backscatter signal in an opposite direction relative to interrogation pulse(s).
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3.发明授权公开(公告)号：US11467061B2
公开(公告)日：2022-10-11
申请号：US17341033
申请日：2021-06-07
发明人： Fatih Yaman , Eduardo Mateo Rodriguez , Shinsuke Fujisawa , Hussam Batshon , Kohei Nakamura , Takanori Inoue , Yoshihisa Inada , Takaaki Ogata
IPC分类号： G01M11/00
摘要： Aspects of the present disclosure describe a method for estimating mode field distribution in optical fibers from guided acoustic-wave Brillouin scattering wherein light for which the optical mode-field distribution is determined remains in the optical fibers and the distribution is made for light inside the fiber, and not at a fiber/air interface or other perturbation points to the fiber resulting in a more accurate representation of the optical mode-field distribution in the fiber. Since light is always in the fiber during the determination, no complicated fiber preparation steps or procedures are required and the mode-field distribution is determined as an average distribution along the length of the fiber under test.
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公开(公告)号：US11888583B2
公开(公告)日：2024-01-30
申请号：US17543616
申请日：2021-12-06
发明人： Fatih Yaman , Shinsuke Fujisawa , Hussam Batshon , Takigawa Yoshinari , Ryuji Aida , Takanori Inoue , Eduardo Rodriguez , Yoshihisa Inada
CPC分类号： H04J14/0221 , G02B6/4427 , H04Q11/0001 , G02B6/506
摘要： Aspects of the present disclosure describe systems, methods. and structures directed to an integrated 3-way branching unit switch module suitable for undersea application.
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公开(公告)号：US12034482B2
公开(公告)日：2024-07-09
申请号：US17336280
申请日：2021-06-01
发明人： Fatih Yaman , Eduardo Mateo Rodriguez , Shinsuke Fujisawa , Hussam Batshon , Kohei Nakamura , Takanori Inoue , Yoshihisa Inada , Takaaki Ogata
IPC分类号： H04B10/2537 , G01H9/00 , H01S3/067 , H01S3/10 , H01S3/16 , H01S3/30 , H04B10/073 , H04B10/61
CPC分类号： H04B10/2537 , G01H9/004 , H01S3/06716 , H01S3/10061 , H01S3/1608 , H01S3/302 , H04B10/073 , H04B10/615
摘要： Aspects of the present disclosure are directed to systems, methods, and structures providing for the accurate measurement of guided acoustic-wave Brillouin scattering in optical fiber transmission systems and facilities.
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公开(公告)号：US11782217B2
公开(公告)日：2023-10-10
申请号：US17684408
申请日：2022-03-01
发明人： Fatih Yaman , Eduardo Mateo Rodriguez , Hassam Batshon , Shinsuke Fujisawa , Kohei Nakamura , Takanori Inoue , Yoshihisa Inada
CPC分类号： G02B6/274 , G02B6/4213
摘要： Aspects of the present disclosure describe methods for reducing guided acoustic wave Brillouin (GAWBS) noise in an optical fiber that may be included in an optical communications system by reducing the polarization diffusion length of the fiber by increasing the birefringence of the optical fiber, the increased birefringence of the optical fiber being increased with respect to its average magnitude. Additionally, the polarization diffusion length is reduced by reducing the coherence length of birefringence of the optical fiber.
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公开(公告)号：US11700067B2
公开(公告)日：2023-07-11
申请号：US17468655
申请日：2021-09-07
发明人： Fatih Yaman , Shinsuke Fujisawa , Hussam Batshon , Yoshinari Takigawa , Ryu Kurahashi , Ryuji Aida , Kohei Nakamura , Takanori Inoue , Eduardo Rodriguez , Yoshihisa Inada
CPC分类号： H04B10/80 , G02B6/4427 , H04Q11/0001
摘要： Aspects of the present disclosure describe a three-way branching unit switch module having a small footprint suitable for application in an undersea application.
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