公开(公告)号：US10708094B2

公开(公告)日：2020-07-07

申请号：US16153051

申请日：2018-10-05

申请人： NEC Laboratories America, Inc. ,  NEC Corporation

发明人： Fatih Yaman ,  Shaoliang Zhang ,  Eduardo Mateo Rodriguez ,  Yoshihisa Inada ,  Yue-Kai Huang ,  Weiyang Mo

IPC分类号： H04L25/03 ,  G06N3/08 ,  H04B10/079 ,  H04B10/2513 ,  H04B10/2507 ,  H04B10/69

摘要： Systems and methods for transmission filtering are provided. A receiver includes an input coupled to a transmission line to receive distorted optical symbols. A distortion filter is coupled to the input to replace the distorted optical symbols with predicted symbols using a trained neural network. A decoder is coupled to the distortion filter to decode the predicted symbols.

公开(公告)号：US20190109736A1

公开(公告)日：2019-04-11

申请号：US16153051

申请日：2018-10-05

申请人： NEC Laboratories America, Inc. ,  NEC Corporation

发明人： Fatih Yaman ,  Shaoliang Zhang ,  Eduardo Mateo Rodriguez ,  Yoshihisa Inada ,  Yue-Kai Huang ,  Weiyang Mo

IPC分类号： H04L25/03 ,  H04B10/079 ,  G06N3/08

摘要： Systems and methods for transmission filtering are provided. A receiver includes an input coupled to a transmission line to receive distorted optical symbols. A distortion filter is coupled to the input to replace the distorted optical symbols with predicted symbols using a trained neural network. A decoder is coupled to the distortion filter to decode the predicted symbols.

公开(公告)号：US11543287B2

公开(公告)日：2023-01-03

申请号：US17324089

申请日：2021-05-18

申请人： NEC Laboratories America, Inc.

发明人： Ezra Ip ,  Yue-Kai Huang

IPC分类号： G01H9/00

摘要： Systems, methods, and structures that provide distributed acoustic sensing using chirped optical pulses of selectable duration and bandwidth, at a frame rate limited by a round-trip propagation time of a fiber under test. Instead of processing a transmitted chirped pulse as a single sequence—our systems, methods, and structures employ a parallel fragmented multiband architecture, where each tributary correlates the received signal with a truncated chirped pulse to obtain the Rayleigh impulse response over its frequency band. By reducing the duration of the chirp processed by each tributary, spatial leakage is reduced at all the tributaries, thus even after combining all the interferometric products from all tributaries using a rotated vector sum, the resultant signal is much less impacted by spatial leakage than by using a conventional TGD-OFDR method.

公开(公告)号：US20220128383A1

公开(公告)日：2022-04-28

申请号：US17496678

申请日：2021-10-07

申请人： NEC Laboratories America, Inc.

发明人： Yue-Kai Huang ,  Ezra lp

IPC分类号： G01D5/353

摘要： Aspects of the present disclosure describe DAS/DVS DFOS systems, methods, and structures that advantageously enable/provide OTDR measurement(s).

公开(公告)号：US11159200B2

公开(公告)日：2021-10-26

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： H04B1/00 ,  H04B1/7136 ,  G01H9/00 ,  H04B1/715 ,  H04B1/7143 ,  H04B14/00 ,  H04B1/713

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.

公开(公告)号：US10763964B2

公开(公告)日：2020-09-01

申请号：US16454054

申请日：2019-06-27

申请人： NEC Laboratories America, Inc.

发明人： Yue-Kai Huang ,  Ezra Ip ,  Philip Nan Ji ,  Ming-Fang Huang

IPC分类号： H04B10/00 ,  H04B10/2543 ,  H04B10/25 ,  H04J14/00

摘要： Aspects of the present disclosure describe systems, methods and structures providing bidirectional optical fiber communication and sensing using the same fiber transmission band and bidirectional WDM fiber sharing such that communications channels and optical fiber sensing channel(s) coexist on the same fiber. As a result, nonlinear interaction between communications channels and interrogating pulse(s) of sensing are much reduced or eliminated.

公开(公告)号：US20180102626A1

公开(公告)日：2018-04-12

申请号：US15724755

申请日：2017-10-04

申请人： NEC Laboratories America, Inc.

发明人： Ezra Ip ,  Yue-Kai Huang ,  Fatih Yaman ,  Shaoliang Zhang

IPC分类号： H01S3/23 ,  H01S3/094 ,  H04B10/291 ,  H04B10/293

CPC分类号： H01S3/2316 ,  H01S3/06708 ,  H01S3/06737 ,  H01S3/06754 ,  H01S3/06758 ,  H01S3/094003 ,  H01S3/094011 ,  H01S3/094019 ,  H01S3/094053 ,  H01S3/1608 ,  H01S3/302 ,  H04B10/2912 ,  H04B10/2916 ,  H04B10/2935

摘要： An unrepeatered transmission system includes a receiver coupled to a receive span; a transmitter coupled to the receive span; and a plurality of cascaded amplifiers in the receive span with dedicated fiber cores to supply one or more optical pumps from the receiver to each amplifier, wherein the plurality of cascaded amplifiers increase system reach by increasing the length of a back span in an unrepeatered link.

公开(公告)号：US09654314B2

公开(公告)日：2017-05-16

申请号：US14844909

申请日：2015-09-03

申请人： NEC Laboratories America, Inc.

发明人： Fatih Yaman ,  Shaoliang Zhang ,  Yue-Kai Huang

IPC分类号： H04B10/00 ,  H04L25/03 ,  H04B10/58 ,  H04B10/61

CPC分类号： H04L25/03859 ,  H04B10/2507 ,  H04B10/58 ,  H04B10/616 ,  H04L25/03171 ,  H04L25/03343

摘要： A system for optimizing signal quality in an optical communication system is provided including a transmitter for converting digital signals to optical signals, the transmitter including a transmitter digital signal processing chip including a pre-distortion logic and a transmitter look-up table (LUT). A receiver is operatively coupled to the transmitter for receiving and converting the optical signals from the transmitter to digital signals. The receiver includes a receiver digital signal processing chip including a correction logic and a receiver look-up table (LUT). The transmitter LUT is constructed by scaling the receiver LUT by a weight factor and is iteratively updated based on a weighted sum of the receiver LUT.

公开(公告)号：US20160105297A1

公开(公告)日：2016-04-14

申请号：US14844909

申请日：2015-09-03

申请人： NEC Laboratories America, Inc.

发明人： Fatih Yaman ,  Shaoliang Zhang ,  Yue-Kai Huang

IPC分类号： H04L25/03 ,  H04B10/61 ,  H04B10/58

CPC分类号： H04L25/03859 ,  H04B10/2507 ,  H04B10/58 ,  H04B10/616 ,  H04L25/03171 ,  H04L25/03343

摘要： A system for optimizing signal quality in an optical communication system is provided including a transmitter for converting digital signals to optical signals, the transmitter including a transmitter digital signal processing chip including a pre-distortion logic and a transmitter look-up table (LUT). A receiver is operatively coupled to the transmitter for receiving and converting the optical signals from the transmitter to digital signals. The receiver includes a receiver digital signal processing chip including a correction logic and a receiver look-up table (LUT). The transmitter LUT is constructed by scaling the receiver LUT by a weight factor and is iteratively updated based on a weighted sum of the receiver LUT.

摘要翻译： 提供了一种用于优化光通信系统中的信号质量的系统，包括用于将数字信号转换为光信号的发射机，该发射机包括包含预失真逻辑和发射机查找表（LUT）的发射机数字信号处理芯片。 接收机可操作地耦合到发射机，用于接收和转换从发射机到数字信号的光信号。 该接收机包括一个包括校正逻辑和接收机查找表（LUT）的接收机数字信号处理芯片。 发射机LUT是通过将接收机LUT缩放权重因子来构建的，并且基于接收机LUT的加权和重复地更新发射机LUT。

公开(公告)号：US20160028475A1

公开(公告)日：2016-01-28

申请号：US14808414

申请日：2015-07-24

申请人： NEC Laboratories America, Inc.

发明人： Shaoliang Zhang ,  Fatih Yaman ,  Yue-Kai Huang ,  Ting Wang

IPC分类号： H04B10/077 ,  H04B10/564 ,  G02F1/01

CPC分类号： H04B10/0775 ,  G02F1/0123 ,  H04B10/50575 ,  H04B10/564 ,  H04B2210/075

摘要： A system for centralized automatic bias control for a plurality of modulators, including a coupler for coupling output of each of the plurality of modulators to generate a combined modulator output. A pilot insertion device inserts a pilot tone into each of the plurality of modulators such that a different pilot tone frequency is inserted for each of the plurality of modulators. A monitoring device iteratively monitoring power (Pt) of each inserted pilot tone over time to determine whether a current modulator bias is optimal for each of the plurality of modulators, and an adjuster device iteratively adjusts the modulator bias for each of the plurality of modulators for which the current modulator bias is determined to be sub-optimal until a threshold condition has been met.

摘要翻译： 一种用于多个调制器的集中自动偏置控制的系统，包括用于耦合所述多个调制器中的每一个的输出的耦合器以产生组合的调制器输出。 导频插入装置将导频音插入到多个调制器中的每一个中，使得为多个调制器中的每一个插入不同的导频音频率。 一种监测装置，迭代地监视随时间推移的每个插入的导频音的功率（Pt），以确定所述多个调制器中的每个调制器的当前调制器偏置是否最佳，并且调节器装置迭代地调整所述多个调制器中的每一个的调制器偏置，以供 其中电流调制器偏置被确定为次优，直到满足阈值条件。