公开(公告)号：US12119869B2

公开(公告)日：2024-10-15

申请号：US17927056

申请日：2020-05-28

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Ryo Igarashi ,  Masamichi Fujiwara ,  Takuya Kanai

IPC: H04B10/079

CPC classification number: H04B10/07955 ,  H04B10/0797

Abstract: An optical amplification estimation method includes by an excitation light output unit connected to a first end of a first optical transmission line, making excitation light incident on the first optical transmission line, by a monitoring unit connected to the same side as the first end of the first optical transmission line, making monitoring light incident on the first optical transmission line, the monitoring light having a wavelength different from a wavelength of the excitation light, by the monitoring unit, measuring intensity of light incident on the monitoring unit when the excitation light is incident, and intensity of light incident on the monitoring unit when the excitation light is not incident, and by an amplification estimation unit, estimating a gain of an optical signal in the first optical transmission line based on the light intensity measured in the measuring. The first optical transmission line shares a partial optical transmission line with a second optical transmission line used for an optical network unit and an optical line terminal to transmit and receive an optical signal to and from each other.

公开(公告)号：US12113572B2

公开(公告)日：2024-10-08

申请号：US18066643

申请日：2022-12-15

Applicant: Alibaba (China) Co., Ltd.

Inventor： Liang Dou ,  Chongjin Xie ,  Jingchi Cheng ,  Pak Tao Lau

IPC: H04B10/00 ,  H04B10/079 ,  H04J14/02 ,  H04J14/00

CPC classification number: H04B10/07955 ,  H04B10/0797 ,  H04J14/0221

Abstract: A method for calculating configuration of an optical transmission network includes: acquiring an initial value of an input power of an optical cable; based on the initial value, obtaining an output power of each channel at an end of a section of the optical cable according to a loss of the optical cable; taking the output power of each channel at the end of the section as a boundary condition to calculate the input power of each channel at the section based on an amount of optical power transferred from a high-frequency channel to a low-frequency channel due to an SRS effect; and calculating a first parameter value of an optical amplifier of the section using the input power of each channel at the section and the output power of each channel at the end of a preceding section of the section.

公开(公告)号：US20240333384A1

公开(公告)日：2024-10-03

申请号：US18191429

申请日：2023-03-28

Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION

Inventor： Robert LYNCH ,  Hyman David CHANTZ ,  Elijah SWIFT

IPC: H04B10/079

CPC classification number: H04B10/07955

Abstract: Links between multiple points are monitored. A determination is made that there is a change in power on a link being monitored. Based on determining that there is the change in the power on the link, latency on the link is checked and an anomaly on the link is detected. Based on detecting that there is the anomaly on the link, a determination is made of a type of the anomaly based on whether the checking indicates there is a latency change in the latency of the link.

公开(公告)号：US12093875B2

公开(公告)日：2024-09-17

申请号：US17558065

申请日：2021-12-21

Applicant: SOCIETY OF CABLE TELECOMMUNICATIONS ENGINEERS, INC.

Inventor： Daniel Harvey Howard ,  Thomas Martin Davidson ,  Dean Alan Stoneback ,  Steven Richard Harris ,  Pamela Ann Nobles ,  Christopher Dale Bastian

IPC: G06Q10/0639 ,  G06Q10/10 ,  G06Q10/20 ,  G06Q50/20 ,  G09B19/00 ,  H04B10/079

CPC classification number: G06Q10/06398 ,  G06Q10/10 ,  G06Q10/20 ,  H04B10/07955 ,  G06Q50/2057 ,  G09B19/00

Abstract: System, methods, and devices for measuring the performance of a component of a communications network recently installed by a technician using proactive network maintenance parameters, and further assessing the installation performed by the technician.

公开(公告)号：US20240291571A1

公开(公告)日：2024-08-29

申请号：US18326313

申请日：2023-05-31

Applicant: LUMENTUM TECHNOLOGY UK LIMITED

Inventor： Stuart CONLEY ,  Colin SMITH ,  Nick BROOKS

IPC: H04B10/61 ,  H04B10/079

CPC classification number: H04B10/61 ,  H04B10/07955

Abstract: An optical receiver includes an integrated receiver chip includes a data port configured to receive an optical data signal derived from a receive optical signal, a first waveguide coupled to the data port and configured to transmit the optical data signal from the data port to an optical waveguide circuit of the integrated receiver chip, a power monitoring port configured to receive an optical monitoring signal derived from the receive optical signal, and a second waveguide coupled to the power monitoring port and configured to transmit the optical monitoring signal to a monitor photodiode that is monolithically integrated in the integrated receiver chip. The monitor photodiode is configured to convert the optical monitoring signal into an electrical signal representative of an optical input power of the receive optical signal.

公开(公告)号：US12074638B2

公开(公告)日：2024-08-27

申请号：US17285297

申请日：2019-12-11

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Kangho Byun

IPC: H04B10/079 ,  G01J9/02 ,  H04B10/077

CPC classification number: H04B10/07955 ,  G01J9/0246 ,  H04B10/0775

Abstract: Provided are various embodiments related to an electronic device. According to an embodiment, an electronic device may comprise: an IR (infrared light) transmission unit for outputting IR light; an IR reception unit for receiving IR light; and processor. The processor is configured to: identify a first IR transmission signal to be transmitted to an external device; identify a first time interval and a second time interval, which correspond to the first IR transmission signal; output first IR light corresponding to at least a part of the first IR transmission signal through the IR transmission unit in the first time interval; identify whether second IR light having the intensity larger than or equal to a threshold is received by the IR reception unit in the second time interval; and when the second IR light having the intensity larger than or equal to the threshold is received by the IR reception unit in the second time interval, interrupt transmission of the IR transmission signal. In addition, other embodiments may be possible.

公开(公告)号：US20240283533A1

公开(公告)日：2024-08-22

申请号：US18644585

申请日：2024-04-24

Applicant: NATIONAL UNIVERSITY OF DEFENSE TECHNOLOGY

Inventor： Pengpeng LI ,  Zhibin XIAO ,  Baiyu LI ,  Zhicheng LYU ,  Feixue WANG ,  Wenxiang LIU ,  Lei CHEN ,  Xinming HUANG ,  Mingzan XIE ,  Huan LIU ,  Shuibin ZHONG

IPC: H04B10/079 ,  H04Q11/00

CPC classification number: H04B10/07955 ,  H04Q11/0005 ,  H04Q2011/0039 ,  H04Q2011/0058 ,  H04Q2213/13335

Abstract: A massive multiple-input multiple-output channel emulation method and a device based on optical matrix switching are provided. The method is realized based on a massive multiple-input multiple-output channel emulation system, which includes a plurality of channel preprocessing subsystems, an optical switching subsystem, a plurality of channel characteristic emulation subsystems, a self-checking and self-correcting subsystem, a mathematical simulation and monitoring subsystem and a time-frequency synthesis and distribution subsystem. All the subsystems are interconnected by various optical fiber connections, which are used to transmit high-speed data signals, communication information, control instructions, frequency, pulse and time signals, and have the centralized-distributed layout ability of various devices in the system based on long-distance transmission of optical fiber signals, and have the massive parallel expansion ability of the number of system signal input and output links.

公开(公告)号：US20240250752A1

公开(公告)日：2024-07-25

申请号：US18560408

申请日：2022-05-13

Applicant: NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY

Inventor： Ryousuke MATSUMOTO

IPC: H04B10/079

CPC classification number: H04B10/07955 ,  H04B10/07953

Abstract: In order to estimate an upper limit value of a bit error rate in an optical transmission unit for an optical transmission system in which an optical sender and an optical receiver are connected each other through the optical transmission unit that utilizes plural spatial resources, and coherent detection is used, after obtaining an amplitude of each crosstalk for different spatial resource in the optical transmission unit and variance of additive white Gaussian noise in the optical transmission system, by changing a value of an independent variable in a formula of the bit error rate, a minimum value of the formula is searched for as the upper limit value of the bit error rate. The formula is represented by the amplitude of each crosstalk, the variance of the additive white Gaussian noise and the independent variable that is different from a time axis.

公开(公告)号：US12047117B2

公开(公告)日：2024-07-23

申请号：US17443607

申请日：2021-07-27

Applicant: EXFO Inc.

Inventor： Gang He ,  Michel Leclerc

IPC: H04B10/079 ,  G02B6/42

CPC classification number: H04B10/07955 ,  G02B6/4286

Abstract: There are provided herein test instruments, devices and methods for measuring the optical power loss of optical-fiber devices under test, and particularly those terminated with multifiber connectors, which allows for a one-cord or one-cord equivalent reference method whichever the pinning of the actual optical-fiber device under test. There is proposed to add an optical-fiber expansion device to convert the pinning of the input interface of the power meter instrument from pinned to unpinned or vice-versa, while not adding extra measurement uncertainty. This is accomplished using a patch cord which core diameter is between that of the device under test and that of the input interface of the power meter instrument.

公开(公告)号：US20240204868A1

公开(公告)日：2024-06-20

申请号：US18067847

申请日：2022-12-19

Applicant: Schweitzer Engineering Laboratories, Inc.

Inventor： David J. Dolezilek ,  Mauricio G. Silveira ,  Bharat Nalla

IPC: H04B10/079

CPC classification number: H04B10/07955 ,  G08B21/182

Abstract: A fiber optic communication system may include a transmitting subsystem, a receiving subsystem, a power monitoring subsystem, a temperature monitoring subsystem, an alarm subsystem, and a data logging subsystem. The transmitting subsystem may be configured to transmit optical signals encoding data into an optical path. The receiving subsystem may be configured to receive the optical signals transmitted by the transmitting subsystem and decode the data encoded in the optical signal. The power monitoring subsystem may be configured to measure a power of the optical signal during normal operations. The temperature monitoring subsystem may monitor the temperature of the fiber optic communication system at various locations. The alarm subsystem may generate an alarm if the system operates outside of certain thresholds. The data logging subsystem may log the measured temperatures and optical signal power of the fiber optic communication system.