公开(公告)号：US20160301367A1

公开(公告)日：2016-10-13

申请号：US15089987

申请日：2016-04-04

Applicant: NEC Laboratories America, Inc.

Inventor： Junqiang Hu ,  Ting Wang

IPC: H03F1/26 ,  G01N21/39

CPC classification number: G01N21/39 ,  G01J3/28 ,  G01J3/4338 ,  G01J2001/4242 ,  G01N2201/06113 ,  G01N2201/12

Abstract: A gas sensing system includes a signal generator including a wavelength tunable laser, the signal generator providing a first periodic signal and a second periodic signal, wherein the first periodic signal comprises a wavelength scanning signal and the second periodic signal comprises a modulation signal; an optical signal absorption path which is wavelength selective, wherein the generated signal covers at least one of the absorbance band; a signal detector that uses lock-in detection to detect a second harmonic of the second periodic signal after absorption, the signal detector further including a local reference generator, a multiplier, and a low pass filter; a local reference includes a first path (ref1) that outputs sinusoidal signal with frequency equals to that of the second signal in signal generator, and a second path (ref2) that outputs sinusoidal signal of two times ref1 frequency; and a local reference generator having a first phase shifter that is configurable from 0 to 2π and a second phase shifter that shifts 90-degree, wherein the first phase shifter is for an alignment of ref1 with the modulation signal and the second phase shifter provides 90-degree shifts for ref2 from ref1, wherein the first and second paths (ref1 and ref2) are selected by a switch, wherein the switch uses the first path during initialization and the second path for normal operation.

Abstract translation: 气体感测系统包括信号发生器，其包括波长可调谐激光器，信号发生器提供第一周期信号和第二周期信号，其中第一周期信号包括波长扫描信号，第二周期信号包括调制信号; 一种波长选择性的光信号吸收路径，其中产生的信号覆盖吸收带中的至少一个; 信号检测器，其使用锁定检测来检测吸收之后的第二周期信号的二次谐波，所述信号检测器还包括本地参考发生器，乘法器和低通滤波器; 本地参考包括输出频率等于信号发生器中的第二信号的正弦信号的第一路径（ref1）和输出两倍ref1频率的正弦信号的第二路径（ref2）; 以及具有可配置为0至2π的第一移相器和90度移位的第二移相器的本地参考发生器，其中第一移相器用于ref1与调制信号的对准，而第二移相器提供90 ref2从ref1进行偏移，其中第一和第二路径（ref1和ref2）由开关选择，其中开关在初始化期间使用第一路径，并且第二路径用于正常操作。

公开(公告)号：US20150181316A1

公开(公告)日：2015-06-25

申请号：US14573483

申请日：2014-12-17

Applicant: NEC Laboratories America, Inc.

Inventor： Ankitkumar Patel ,  Konstantinos Kanonakis ,  Junqiang Hu ,  Philip Ji

IPC: H04Q11/00

CPC classification number: H04Q11/0005 ,  H04J3/1664 ,  H04J2203/0012 ,  H04J2203/0019 ,  H04Q11/0062

Abstract: Methods and systems for flexible-client, flexible-link optical transponders include electrical-to-optical transponders, which accept client data from a flow distributor, and a first multiplexing switch that connects modulated optical carriers from the transponders to line interfaces. The electrical-to-optical transponders each include a flexible optical transport unit (OTU) framer module that compresses multiple optical data units (ODUs) into a single ODU having a higher order than any of the input ODUs to form an optical transport network (OTN) frame. An electrical-to-optical modulator modulates OTN frames onto a carrier. The transponder includes a second multiplexing switch that accepts optical carriers from line interfaces and optical-to-electrical transponders that accept modulated optical carriers from the second multiplexing switch. Each optical-to-electrical transponder includes a photodetector to convert the modulated optical carriers to the electrical domain and a flexible OTU framer module that decompresses received ODUs in OTN frames into multiple ODUs to form a bit stream.

Abstract translation: 灵活客户端，灵活链路光转发器的方法和系统包括接收来自流分发器的客户端数据的电 - 光转发器，以及将来自应答器的调制光载波连接到线路接口的第一复用交换机。 电光转发器每个都包括柔性光传输单元（OTU）成帧器模块，其将多个光数据单元（ODU）压缩成具有比任何输入ODU高的单个ODU，以形成光传输网络（OTN ）框架。 电光调制器将OTN帧调制到载波上。 应答器包括第二复用开关，其接收来自线路接口的光载波和接收来自第二复用交换机的调制光载波的光电转发器。 每个光电转发器包括用于将经调制的光载波转换成电域的光电检测器，以及将OTN帧中接收的ODU解压缩成多个ODU以形成比特流的灵活OTU成帧器模块。

公开(公告)号：US09002195B2

公开(公告)日：2015-04-07

申请号：US13628572

申请日：2012-09-27

Applicant: NEC Laboratories America, Inc.

Inventor： Junqiang Hu ,  Philip Nan Ji ,  Ting Wang ,  Yoshiaki Aono

IPC: H04B10/00 ,  H04B10/038 ,  H04B10/032

CPC classification number: H04B10/038 ,  H04B10/032

Abstract: In an optical communication system containing a primary line and backup line card, a method includes providing interfaces for the primary and backup line card, each line card including a transmitter and receiver; and selecting output from the transmitter from either the primary or back up line card including selecting the backup line card when the primary line card encounters a failure.

Abstract translation: 在包含主线路和备用线路卡的光通信系统中，一种方法包括提供用于主线路和备用线路卡的接口，每个线路卡包括发射机和接收机; 以及从主或备用线卡选择发射机的输出，包括当主线卡遇到故障时选择备用线路卡。

公开(公告)号：US20150055664A1

公开(公告)日：2015-02-26

申请号：US14465122

申请日：2014-08-21

Applicant: NEC Laboratories America, Inc.

Inventor： Konstantinos Kanonakis ,  Junqiang Hu ,  Ankitkumar Patel ,  Philip Ji ,  Ting Wang

IPC: H04B10/27 ,  H04B10/50 ,  H04B10/60 ,  H04B10/40

CPC classification number: H04Q11/00 ,  H04L12/40136 ,  H04Q2213/13103 ,  H04Q2213/13292 ,  H04Q2213/13389 ,  Y02D50/10

Abstract: Systems and methods for data transport, including receiving one or more signals into a reconfigurable and flexible rate shared rate multi-transponder network architecture, wherein the network architecture includes one or more transponders with multiple line side interfaces and one or more client side interfaces. The transponders are configured to map one or more signals to multiple parallel Virtual Ethernet Links, remove idle characters from the one or more signals, buffer one or more blocks of characters using an intermediate block buffer, activate and deactivate one or more portions of input/output electrical lanes of an Ethernet module, multiplex and demultiplex the one or more signals to and from the input/output electrical lanes to enable sharing of a single optical transceiver by multiple independent signals, and insert blocks of idle characters to enable transmission over a lower rate transmission pipe.

Abstract translation: 用于数据传输的系统和方法，包括将一个或多个信号接收到可重配置和灵活的速率共享速率多应答器网络架构中，其中所述网络架构包括具有多个线路侧接口和一个或多个客户机侧接口的一个或多个转发器。 应答器被配置为将一个或多个信号映射到多个并行虚拟以太网链路，从一个或多个信号中去除空闲字符，使用中间块缓冲器缓冲一个或多个字符块，激活和去激活输入/ 以太网模块的输出电气通道，将一个或多个信号复用到多路复用并从输入/输出电路解复用，以使得能够通过多个独立信号共享单个光收发器，并插入空闲字符块以使得能够在较低的 速率传输管。

公开(公告)号：US20150043927A1

公开(公告)日：2015-02-12

申请号：US14457460

申请日：2014-08-12

Applicant: NEC Laboratories America, Inc.

Inventor： Junqiang Hu ,  Ting Wang ,  Lei Xu

IPC: H04B10/61

CPC classification number: H04B10/613 ,  H04B10/612 ,  H04B10/614

Abstract: A method for reducing optical components at a receiver which include converting an input signal at a receiver to include an interleaving of alternate signal diversity components, the signal diversity components including phase diversity when the converting includes 0 and 90 degree interleaving and the signal diversity components include polarization diversity interleaving when the converting includes interleaved orthogonal polarizations, and combining the signal diversity components for enabling a single photo detection at the receiver to detect the alternative signal diversity components for subsequent analog-to-digital conversion.

Abstract translation: 一种用于减少接收机处的光学部件的方法，包括在接收机处转换输入信号以包括交替的信号分集分量的交织，所述信号分集分量包括当转换包括0和90度交织时的相位分集，并且信号分集分量包括 当转换包括交错的正交偏振时，偏振分集交错，以及组合信号分集分量，以使接收机处的单次光检测能够检测用于随后的模数转换的备选信号分集分量。

公开(公告)号：US20140365835A1

公开(公告)日：2014-12-11

申请号：US14293570

申请日：2014-06-02

Applicant: NEC Laboratories America, Inc.

Inventor： Junqiang Hu ,  Ting Wang ,  Sadaichiro Ogushi

IPC: G06F11/07

CPC classification number: G06F11/076 ,  G06F7/58 ,  G06F11/0745

Abstract: The invention uses a PRBS pattern generated by transmitter (serializer) as training At the receiver side, following receiver outputs, a synchronous capturing module is used to capture multiple lanes simultaneously. The captured data is used to calculate the PRBS distance for different lanes. After the distances are obtained, the one with largest latency is used as a reference, to calculate the relative latency with each other lane. This relative latency is further used to calculate the number of shifts for Barrel Shifter and word shifter.

Abstract translation: 本发明使用由发射机（串行器）生成的PRBS模式作为训练在接收机侧，在接收机输出之后，同步捕获模块用于同时捕获多个通道。 捕获的数据用于计算不同车道的PRBS距离。 在获得距离之后，将具有最大延迟的一个作为参考，以计算每个其他车道的相对等待时间。 进一步使用这种相对延迟来计算桶式移位器和字移位器的移位数。

公开(公告)号：US20140301733A1

公开(公告)日：2014-10-09

申请号：US14244253

申请日：2014-04-03

Applicant: NEC Laboratories America, Inc.

Inventor： Junqiang Hu ,  Ting Wang

IPC: H04B10/079 ,  H04J14/08 ,  H04B10/40

CPC classification number: H04B10/0795 ,  H04B10/0793 ,  H04B10/40 ,  H04J14/08 ,  H04Q11/0062 ,  H04Q2011/0086

Abstract: There are provided an optical transponder having a first end and a second end, as well as an electric switch having the transponder. The transponder includes an optical interface, at the first end, having a variable rate optical transmitter and a variable rate optical receiver to respectively transmit and receive signals using at least one of different bandwidths and different bit rates. The transponder further includes an electrical interface, at the second end, having an electrical interface throughput matching an optical capacity of the optical interface. The transponder also includes a processor for controlling the optical capacity.

Abstract translation: 提供了具有第一端和第二端的光学应答器，以及具有应答器的电开关。 应答器包括光接口，其在第一端具有可变速率光发射机和可变速率光接收机，以使用不同带宽和不同比特率中的至少一个分别发射和接收信号。 应答器还包括电接口，在第二端具有与光学接口的光学容量匹配的电接口吞吐量。 应答器还包括用于控制光学容量的处理器。

公开(公告)号：US12078526B2

公开(公告)日：2024-09-03

申请号：US17522844

申请日：2021-11-09

Applicant: NEC Laboratories America, Inc.

Inventor： Junqiang Hu

IPC: G06F11/30 ,  G01H9/00 ,  G02F1/125 ,  H04B10/61

CPC classification number: G01H9/004 ,  G02F1/125 ,  H04B10/613 ,  H04B10/6151

Abstract: Aspects of the present disclosure are directed to improved systems, methods, and structures providing coherent detection of DAS. In sharp contrast to the prior art, systems, methods, and structures according to aspects of the present disclosure advantageously reduce the beating diversity terms such that required memory and bandwidth are reduced over the art.

公开(公告)号：US12025488B2

公开(公告)日：2024-07-02

申请号：US18126409

申请日：2023-03-25

Applicant: NEC Laboratories America, Inc.

Inventor： Junqiang Hu ,  Ting Wang

IPC: G01H9/00 ,  G01K11/32 ,  G01L1/24

CPC classification number: G01H9/004 ,  G01K11/32 ,  G01L1/242

Abstract: Distributed fiber optic sensing systems (DFOS) methods, and structures that employ DVS/DAS point sensors and a two-stage processing methodology/structure that advantageously enable point sensors to send sensor data at any time—thereby providing significant processing advantages over the prior art.

公开(公告)号：US11736867B2

公开(公告)日：2023-08-22

申请号：US17579516

申请日：2022-01-19

Applicant: NEC Laboratories America, Inc.

Inventor： Junqiang Hu ,  Ting Wang

IPC: H04R23/00 ,  G01H9/00 ,  H03G3/30 ,  H04R1/08 ,  H04R3/00

CPC classification number: H04R23/008 ,  G01H9/004 ,  H03G3/3005 ,  H04R1/08 ,  H04R3/00 ,  H03G2201/103 ,  H04R2430/01

Abstract: Aspects of the present disclosure describe DFOS/DAS systems, methods, and structures that employ active microphones to enhance DAS operational capabilities by using an active circuit to amplify acoustic signals including voice(s). The circuit includes a microphone to collect acoustic signal(s) resulting from voice signals in the environment, and a speaker or a vibration device driven by an amplifier. The circuit can be clipped onto the fiber, with direct contact through the speaker or vibration device. A microcontroller may advantageously be employed to control the circuit for reduced power consumption, by detecting activities locally and only enabling the speaker when needed. The microcontroller may also send other information such as battery status to the DFOS interrogator through vibration codes.