公开(公告)号：US11700067B2

公开(公告)日：2023-07-11

申请号：US17468655

申请日：2021-09-07

Applicant: NEC Laboratories America, Inc.

Inventor： Fatih Yaman ,  Shinsuke Fujisawa ,  Hussam Batshon ,  Yoshinari Takigawa ,  Ryu Kurahashi ,  Ryuji Aida ,  Kohei Nakamura ,  Takanori Inoue ,  Eduardo Rodriguez ,  Yoshihisa Inada

IPC: H04Q11/00 ,  H04B10/80 ,  G02B6/44

CPC classification number: H04B10/80 ,  G02B6/4427 ,  H04Q11/0001

Abstract: Aspects of the present disclosure describe a three-way branching unit switch module having a small footprint suitable for application in an undersea application.

公开(公告)号：US10833770B2

公开(公告)日：2020-11-10

申请号：US16449319

申请日：2019-06-21

Applicant: NEC Laboratories America, Inc.

Inventor： Shaoliang Zhang ,  Fatih Yaman ,  Eduardo Rodriguez ,  Yoshihisa Inada ,  Kohei Nakamura ,  Takanori Inoue

IPC: H04B10/2543 ,  G06K9/62 ,  H04L27/26 ,  G06N3/08 ,  H04B10/2531 ,  H04B10/61 ,  H04L27/20 ,  H04B10/40 ,  H04B10/50 ,  H04B10/60

Abstract: Aspects of the present disclosure describe systems, methods and structures for optical fiber nonlinearity compensation using neural networks that advantageously employ machine learning (ML) algorithms for nonlinearity compensation (NLC) that advantageously provide a system-agnostic model independent of link parameters, and yet still achieve a similar or better performance at a lower complexity as compared with prior-art methods. Systems, methods, and structures according to aspects of the present disclosure include a data-driven model using the neural network (NN) to predict received signal nonlinearity without prior knowledge of the link parameters. Operationally, the NN is provided with intra-channel cross-phase modulation (IXPM) and intra-channel four-wave mixing (IFWM) triplets that advantageously provide a more direct pathway to underlying nonlinear interactions.

公开(公告)号：US10401564B2

公开(公告)日：2019-09-03

申请号：US16155787

申请日：2018-10-09

Applicant: NEC Laboratories America, Inc.

Inventor： Fatih Yaman ,  Shaoliang Zhang ,  Eduardo Mateo Rodriguez ,  Takanori Inoue ,  Kohei Nakamura ,  Yoshihisa Inada ,  Takaaki Ogata

IPC: G02B6/02 ,  G02B6/036 ,  H04B10/2569 ,  G02B6/38

Abstract: Aspects of the present disclosure describe fiber nonlinearity induced transmission penalties are reduced both in fibers with large polarization-mode dispersion, and in coupled-core multicore fibers (CC-MCF). In the case of coupled multi-core fibers, the requirement for modal delay is less.

公开(公告)号：US12034482B2

公开(公告)日：2024-07-09

申请号：US17336280

申请日：2021-06-01

Applicant: NEC Laboratories America, Inc.

Inventor： Fatih Yaman ,  Eduardo Mateo Rodriguez ,  Shinsuke Fujisawa ,  Hussam Batshon ,  Kohei Nakamura ,  Takanori Inoue ,  Yoshihisa Inada ,  Takaaki Ogata

IPC: H04B10/2537 ,  G01H9/00 ,  H01S3/067 ,  H01S3/10 ,  H01S3/16 ,  H01S3/30 ,  H04B10/073 ,  H04B10/61

CPC classification number: H04B10/2537 ,  G01H9/004 ,  H01S3/06716 ,  H01S3/10061 ,  H01S3/1608 ,  H01S3/302 ,  H04B10/073 ,  H04B10/615

Abstract: 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.

公开(公告)号：US11782217B2

公开(公告)日：2023-10-10

申请号：US17684408

申请日：2022-03-01

Applicant: NEC Laboratories America, Inc.

Inventor： Fatih Yaman ,  Eduardo Mateo Rodriguez ,  Hassam Batshon ,  Shinsuke Fujisawa ,  Kohei Nakamura ,  Takanori Inoue ,  Yoshihisa Inada

IPC: G02B6/27 ,  G02B6/42

CPC classification number: G02B6/274 ,  G02B6/4213

Abstract: 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.

公开(公告)号：US11043786B2

公开(公告)日：2021-06-22

申请号：US15956284

申请日：2018-04-18

Applicant: NEC Laboratories America, Inc.

Inventor： Fatih Yaman ,  Shaoliang Zhang ,  Eduardo Mateo Rodriguez ,  Kohei Nakamura ,  Yoshihisa Inada ,  Takanori Inoue

IPC: H01S3/067 ,  G02B6/44 ,  G02B6/02 ,  H01S3/23 ,  H01S3/094 ,  H01S3/16 ,  H01S3/0941 ,  H01S5/10 ,  H01S5/20 ,  H01S5/40

Abstract: Aspects of the present disclosure describe systems, methods, and structures that advantageously amplify optical signals through the effect of optical pump signals generated by a multicore laser diode and multicore rare-earth doped optical fiber in optical communication with a 3D waveguide structure and a multicore input signal fiber providing a plurality of optical signals for amplification.

公开(公告)号：US11933605B2

公开(公告)日：2024-03-19

申请号：US17577315

申请日：2022-01-17

Applicant: NEC Laboratories America, Inc.

Inventor： Fatih Yaman ,  Hussam Batshon ,  Shinsuke Fujisawa ,  Kohei Nakamura ,  Takanori Inoue ,  Eduardo Mateo Rodriguez ,  Yoshihisa Inada

IPC: G01B11/27 ,  G01M11/00

CPC classification number: G01B11/272 ,  G01M11/33

Abstract: 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.

公开(公告)号：US11467061B2

公开(公告)日：2022-10-11

申请号：US17341033

申请日：2021-06-07

Applicant: NEC Laboratories America, Inc.

Inventor： Fatih Yaman ,  Eduardo Mateo Rodriguez ,  Shinsuke Fujisawa ,  Hussam Batshon ,  Kohei Nakamura ,  Takanori Inoue ,  Yoshihisa Inada ,  Takaaki Ogata

IPC: G01M11/00

Abstract: 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.

公开(公告)号：US11270200B2

公开(公告)日：2022-03-08

申请号：US16285870

申请日：2019-02-26

Applicant: NEC Laboratories America, Inc.

Inventor： Shaoliang Zhang ,  Fatih Yaman ,  Ting Wang ,  Eduardo Rodriguez ,  Yoshihisa Inada ,  Kohei Nakamura ,  Takanori Inoue

IPC: H04B10/61 ,  G06N3/063 ,  G06N3/067 ,  H04B10/27 ,  G06N3/08 ,  H04B10/071 ,  G06N3/04

Abstract: Aspects of the present disclosure describe a method for digital coherent transmission systems that advantageously provides low-complexity, single-step nonlinearity compensation based on artificial intelligence (AI) implemented in a deep neuron network (DNN).