公开(公告)号：US12119867B2

公开(公告)日：2024-10-15

申请号：US17632589

申请日：2019-08-05

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Kei Kitamura ,  Fumikazu Inuzuka ,  Kengo Shintaku ,  Takuya Oda ,  Takafumi Tanaka ,  Masahito Tomizawa

IPC: H04B10/032 ,  H04B10/079

CPC classification number: H04B10/032 ,  H04B10/0795

Abstract: A transmission apparatus includes a control unit for carrying out processing to secure a resource for a standby system path in response to detection of a sign of failure in an active system path.

公开(公告)号：US12063064B2

公开(公告)日：2024-08-13

申请号：US18185327

申请日：2023-03-16

Applicant: Arista Networks, Inc.

Inventor： Alexey Kovsh ,  David Towne

IPC: H04B10/079 ,  H04B10/03 ,  H04B10/032 ,  H04B10/40

CPC classification number: H04B10/03 ,  H04B10/032 ,  H04B10/07955 ,  H04B10/40

Abstract: A method for managing optical transceivers includes obtaining laser measurements for a laser operating in an optical transceiver in a network device, obtaining a failure profile for the laser, making a first determination that the laser measurements match the failure profile, and based on the first determination, initiating a remediation action for the optical transceiver.

公开(公告)号：US11984925B2

公开(公告)日：2024-05-14

申请号：US17766451

申请日：2019-10-30

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Kei Kitamura ,  Fumikazu Inuzuka ,  Kengo Shintaku ,  Takafumi Tanaka ,  Takuya Oda

IPC: H04B10/032 ,  H04B10/07 ,  H04B10/564 ,  H04J14/02 ,  H04Q11/00

CPC classification number: H04B10/032 ,  H04B10/07 ,  H04B10/564 ,  H04J14/0293 ,  H04Q11/0062 ,  H04Q2011/0081 ,  H04Q2213/08

Abstract: A transmission apparatus includes a first communication unit, a second communication unit, a detection unit, a control unit, and a selection unit. The first communication unit uses a first path for communication, when electric power is supplied. The second communication unit uses a second path for communication, when electric power is supplied. The detection unit detects a fault predictive sign. The control unit supplies no electric power to the second communication unit when the detection unit does not detect the fault predictive sign. The control unit starts supplying electric power to the second communication unit and performs normality confirmation of the second path when the detection unit detects the fault predictive sign, before switching from the first path to the second path. The selection unit selects and outputs, when the first communication unit and the second communication unit have received signals, either the signal received by the first communication unit or the signal received by the second communication unit.

公开(公告)号：US11936432B2

公开(公告)日：2024-03-19

申请号：US17907948

申请日：2020-03-06

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Tomoya Hatano ,  Keita Takahashi ,  Naotaka Shibata ,  Hiroko Nomura

IPC: H04B10/03 ,  H04B10/275 ,  H04B10/61 ,  H04B10/032 ,  H04B10/07 ,  H04B10/079 ,  H04J14/02 ,  H04Q11/00

CPC classification number: H04B10/614 ,  H04B10/03 ,  H04B10/275 ,  H04B10/032 ,  H04B10/07 ,  H04B10/07955 ,  H04J14/0287 ,  H04J14/0293 ,  H04Q2011/0081 ,  H04Q2011/0083

Abstract: A communication system of a passive optical communication network includes an optical line terminal (OLT) system including a first OLT, a second OLT, and an OLT control device that controls the first OLT and the second OLT, a plurality of splitters that connect the first OLT and the second OLT with an optical communication path, and an ONU that is connected to each of the splitters with an optical communication path. The splitter distributes and outputs an optical signal transmitted from the OLT system to the ONU connected to the splitter and a succeeding device that is another splitter or the OLT system, and the OLT control device determines a distribution ratio at the splitter, the distribution ratio indicating a ratio between the intensity of the optical signal distributed to the succeeding device and the intensity of the optical signal distributed to the ONU.

公开(公告)号：US11929787B2

公开(公告)日：2024-03-12

申请号：US17911027

申请日：2020-03-13

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Akihiro Tanabe ,  Takashi Mitsui ,  Tomoaki Yoshida ,  Toshiaki Shitaba

IPC: H04B10/03 ,  H04B10/294 ,  H04B10/572 ,  H04B10/61 ,  H04B10/032 ,  H04B10/07 ,  H04J14/02 ,  H04Q11/00

CPC classification number: H04B10/614 ,  H04B10/294 ,  H04B10/572 ,  H04B10/03 ,  H04B10/032 ,  H04B10/07 ,  H04J14/02 ,  H04J14/0287 ,  H04Q2011/0081 ,  H04Q2011/0083

Abstract: An optical transmission apparatus of an embodiment is an apparatus for redundantly transmitting a multiplexed signal obtained by multiplexing N (N is an integer of 2 or greater) optical signals having different wavelengths, the apparatus including: a first demultiplexing unit to which a first multiplexed signal is input, the first demultiplexing unit configured to demultiplex the input first multiplexed signal into the N optical signals; N first detection units to which the N optical signals demultiplexed by the first demultiplexing unit are respectively input, each of the N first detection units configured to detect presence or absence of deterioration of a corresponding input optical signals of the input optical signals based on a signal level of the corresponding input optical signal; a second demultiplexing unit to which a second multiplexed signal is input, the second demultiplexing unit configured to demultiplex the input second multiplexed signal into the N optical signals; N second detection units to which the N optical signals demultiplexed by the second demultiplexing unit are respectively input, each of the N second detection units configured to detect presence or absence of deterioration of a corresponding input optical signal of the input optical signals based on a signal level of the corresponding input optical signal; and a selection unit configured to select, based on the detection result of presence or absence of deterioration of each of the optical signals by the first detection units and the second detection units, N optical signals having different wavelengths from either the optical signals demultiplexed by the first demultiplexing unit or the optical signals demultiplexed by the second demultiplexing unit.

公开(公告)号：US11921335B2

公开(公告)日：2024-03-05

申请号：US17811800

申请日：2022-07-11

Applicant: HIGHYAG LASERTECHNOLOGIE GMBH

Inventor： Eduard Armbruster ,  Frank Schulze

IPC: G02B6/26 ,  G01R31/08 ,  G02B6/28 ,  G02B6/293 ,  G02B6/38 ,  G02B6/42 ,  G02B6/44 ,  G08C23/06 ,  H04B10/032 ,  H04B10/25 ,  G02B6/12

CPC classification number: G02B6/4296 ,  G01R31/083 ,  G02B6/28 ,  G02B6/29391 ,  G02B6/38 ,  G02B6/4292 ,  G02B6/4415 ,  G08C23/06 ,  H04B10/032 ,  H04B10/25891 ,  G02B2006/12147 ,  G02B2006/4297

Abstract: The invention relates to an optical light guiding system, comprising an interface for coupling in and/or an interface for decoupling data and at least one data channel for transmitting data, and a method for transmitting data in optical systems, comprising the steps of coupling data into an interface of a beam guidance element; the transmission of the data by means of a first and/or a second data channel, which are arranged within the beam guiding element (or the casing), wherein the data channels can also be used for the fractional monitoring of the beam guiding element; and decoupling the data from an interface.

公开(公告)号：US11888513B2

公开(公告)日：2024-01-30

申请号：US17849479

申请日：2022-06-24

Applicant: Orange

Inventor： Philippe Chanclou

IPC: H04B10/00 ,  H04B10/038 ,  H04B10/25 ,  H04B10/032 ,  H04B10/079 ,  H04B10/40 ,  H04J14/00

CPC classification number: H04B10/038 ,  H04B10/032 ,  H04B10/07955 ,  H04B10/2589 ,  H04B10/40

Abstract: An optronic transceiver module capable of implementing an optical bidirectional communication of the point to point type via at least one main optical fibre is disclosed. The optronic transceiver module includes a first optical module for supervising an uplink signal received via the main optical fibre delivering a first supervision result, a first optical module for switching the bidirectional communication via the main optical fibre to a bidirectional communication via a backup optical fibre, and vice versa, the first optical switching module being controlled by the first optical supervision module depending on the first supervision result delivered.

公开(公告)号：US11881890B2

公开(公告)日：2024-01-23

申请号：US17850386

申请日：2022-06-27

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Jun Yan ,  Guang Xie

IPC: H04B10/00 ,  H04B10/032 ,  H04B10/079 ,  H04J14/00

CPC classification number: H04B10/032 ,  H04B10/07955

Abstract: An electrical layer subnetwork connection protection includes determining, by a network device including a processor, signal status information based on a power of an obtained optical signal. The signal status information is used to indicate a state of a subnetwork connection carrying the optical signal. The method also includes filtering, by the network device, the signal status information based on a preset first threshold. The first threshold indicates a minimum duration in which the optical signal is in a valid state. The method further includes determining, by the network device based on the filtered signal status information, whether to switch a currently used first clock to a second clock different from the clock. The first clock or the second clock is used to initialize connection monitoring information in response to the determination of whether to switch the currently used first clock to the second clock.

公开(公告)号：US20240007182A1

公开(公告)日：2024-01-04

申请号：US18337013

申请日：2023-06-18

Applicant: OPTIWAVE SYSTEMS INC.

Inventor： Ahmad Atieh ,  Muhammad Jawad Mirza ,  Salman Abdul Ghafoor

IPC: H04B10/032 ,  H04B10/516 ,  H04B10/50 ,  H04B10/564

CPC classification number: H04B10/032 ,  H04B10/516 ,  H04B10/503 ,  H04B10/564

Abstract: The present invention describes a free spectral range (FSR) and center wavelength tunable redundant optical comb based on a sagnac loop mirror (SLM) and bidirectional Mach-Zehnder modulator (BMZM). The optical signal from a continuous wave (CW) laser is split into two parts which travel in clockwise and counter clockwise directions inside the SLM and are modulated by sinusoidal RF signal with the help of BMZM. The modulation of optical signals with sinusoidal RF signal using BMZM results into the generation of two optical combs inside the SLM. Both optical combs are obtained simultaneously at the output port of the SLM when the polarization controller (PC) is adjusted to have 90° phase difference between the clockwise and counterclockwise generated combs. The proposed design can be used in protection switching and in data centers. A corresponding method for generating redundant optical combs is also provided.

公开(公告)号：US20230421934A1

公开(公告)日：2023-12-28

申请号：US18037072

申请日：2020-11-25

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Takamitsu TOCHINO ,  Hirotaka UJIKAWA ,  Yoshihito SAKAI

IPC: H04Q11/00 ,  H04B10/032

CPC classification number: H04Q11/0067 ,  H04B10/032 ,  H04Q2011/0081

Abstract: Provided are a communication control device, a communication control system, a communication control method, and a communication control program that make it difficult to reduce band utilization efficiency. In an OLT server 9b that is a communication control device, a transmission time storage unit 12 stores a transmission time of an optical signal between each ONU 3 and OLT 4. An optical transmission control unit 13 generates control information for controlling transmission start and transmission end of optical signals in each ONU 3. A failure detection suppression unit 15 calculates a first time at which the reception of the optical signal from an ONU 3p ends using control information and a transmission time. The failure detection suppression unit 15 calculates a second time at which synchronization processing ends after the reception of the optical signal from an ONU 3q that transmits the optical signal next after the ONU 3p is started using the synchronization time until the synchronization processing acquired by a synchronization time acquisition unit 14 ends. The failure detection suppression unit 15 causes the failure detection unit 11 that detects a link failure in an OLT 4 to suppress detection of a link failure from the first time to the second time.