公开(公告)号：US20190036602A1

公开(公告)日：2019-01-31

申请号：US16048155

申请日：2018-07-27

申请人： NEC Laboratories America, Inc.

发明人： Giovanni MILIONE

IPC分类号： H04B10/11 ,  H04J14/04 ,  H04B10/516

CPC分类号： H04B10/11 ,  H04B10/112 ,  H04B10/516 ,  H04J14/04

摘要： Aspects of the present disclosure describe systems, methods, and structures for free-space optical communications using Hermite-Gaussian modes resulting in advantageous performance over prior art systems particularly with respect to lateral misalignment.

公开(公告)号：US20210133512A1

公开(公告)日：2021-05-06

申请号：US17081900

申请日：2020-10-27

申请人： NEC Laboratories America, Inc.

发明人： Giovanni MILIONE ,  Philip JI ,  Eric COSATTO

IPC分类号： G06K9/62 ,  G02B27/28

摘要： Aspects of the present disclosure describe systems, methods, and structures for the machine learning based regression of complex coefficients of a linear combination of spatial modes from a multimode optical fiber.

公开(公告)号：US20200119830A1

公开(公告)日：2020-04-16

申请号：US16655103

申请日：2019-10-16

申请人： NEC Laboratories America, Inc.

发明人： Giovanni MILIONE ,  Philip JI ,  Eric COSATTO

IPC分类号： H04J14/04 ,  G06K9/62 ,  G06N20/00 ,  G06N3/02

摘要： Aspects of the present disclosure describe systems, methods and structures for classification of higher-order spatial modes using machine learning systems and methods in which the classification of high-order spatial modes emitted from a multimode optical fiber does not require indirect measurement of the complex amplitude of a light beam's electric field using interferometry or, holographic techniques via unconventional optical devices/elements, which have prohibitive cost and efficacy; classification of high-order spatial modes emitted from a multimode optical fiber is not dependent on a light beam's alignment, size, wave front (e.g. curvature, etc.), polarization, or wavelength, which has prohibitive cost and efficacy; classification of higher-order spatial modes from a multimode optical fiber does not require a prohibitive amount of experimentally generated training examples, which, in turn, has prohibitive efficacy; and the light beam from a multimode optical fiber can be advantageously separated into two orthogonal polarization components, such that, the different linear combination of higher order spatial modes comprising each polarization component can be classified.

公开(公告)号：US20200005036A1

公开(公告)日：2020-01-02

申请号：US16455009

申请日：2019-06-27

申请人： NEC Laboratories America, Inc.

发明人： Philip Nan JI ,  Shuji MURAKAMI ,  Giovanni MILIONE ,  Ting WANG

IPC分类号： G06K9/00 ,  G01N23/203 ,  G06T5/00 ,  G06K9/40

摘要： Aspects of the present disclosure describe systems, methods and structures employing time-space de-noising for distributed sensor.

公开(公告)号：US20190238178A1

公开(公告)日：2019-08-01

申请号：US16258586

申请日：2019-01-26

申请人： NEC Laboratories America, Inc.

发明人： Yue-Kai HUANG ,  Ezra IP ,  Giovanni MILIONE ,  Fatih YAMAN

IPC分类号： H04B1/7136 ,  H04B1/7143 ,  H04B1/715 ,  G01H9/00

CPC分类号： H04B1/7136 ,  G01H9/004 ,  H04B1/7143 ,  H04B1/715

摘要： Aspects of the present disclosure describe systems, methods, and structures for high speed frequency hopping distributed acoustic sensing using an acousto-optic modulated (AOM), gated re-circulating loop and a frequency shifted receiver local oscillator. Using the re-circulating loop controlled by the AOM to generate frequency-hopping pulse(s) increases DAS acoustic bandwidth overcomes infirmities exhibited in the art that generate multiple frequency patterns that are not suitable for long-distance DAS. Additionally, by employing frequency shifted local oscillator (LO) with asymmetric in band detection, bandwidth requirements are reduced by one half.