公开(公告)号：US11916588B2

公开(公告)日：2024-02-27

申请号：US17222157

申请日：2021-04-05

申请人： Verizon Patent and Licensing Inc.

发明人： Tiejun J. Xia ,  Glenn A. Wellbrock

IPC分类号： H04B10/07 ,  H04B10/071 ,  H04B10/61 ,  H04B10/035

CPC分类号： H04B10/071 ,  H04B10/035 ,  H04B10/614

摘要： In some implementations, a device may transmit communication data to a transceiver via an access fiber optic cable. The device may determine that fiber sensing is to be performed for the access fiber optic cable. The device may cease transmission of the communication data for a predetermined time period. The device may generate an optical pulse after ceasing transmission of the communication data. The device may transmit the optical pulse to the transceiver via the access fiber optic cable. The device may receive, prior to expiration of the predetermined time period, a reflected signal from the access fiber optic cable based on the optical pulse. The device may analyze the reflected signal to generate sensing results. The device may perform one or more actions based on the sensing results.

公开(公告)号：US11239909B2

公开(公告)日：2022-02-01

申请号：US17078337

申请日：2020-10-23

申请人： Maxim Integrated Products, Inc.

发明人： Charles Razzell

IPC分类号： G02F1/00 ,  H04B10/035 ,  H04B10/077 ,  H04B10/63

摘要： Dynamic error-quantizer tuning systems and methods prevent misconvergence to local minima by using a dynamic quantizer circuit that controls reference voltages of three or more comparators that are independently adjusted to modify the transfer function of the dynamic quantizer circuit. A weighted sum of the comparator outputs is subtracted from the input to form an error signal in a control loop. The ratio of the reference voltages is chosen to reduce or eliminate local minima during a convergence of the control loop and is set to values that minimize a mean squared error signal with respect to discrete modulation states of the input after the convergence of the control loop is complete.

公开(公告)号：US11057114B2

公开(公告)日：2021-07-06

申请号：US15228462

申请日：2016-08-04

申请人： Acacia Communications, Inc.

发明人： Long Chen ,  Christopher Doerr

IPC分类号： H04B10/075 ,  H04B10/50 ,  H04B10/40 ,  H04B10/035

摘要： Optical transceivers comprising optical loopback circuits are described. The optical transceiver may comprise a housing, which may host a transmitter, a receiver and the optical loopback circuit. The optical loopback circuit may be configured to route at least a portion of a modulated optical signal from the transmitter to the receiver. The optical loopback circuit may comprise tap couplers and/or optical switches. The optical transceiver may be switched between a normal mode and a calibration mode. The optical transceiver may maintain the same fiber connections even when the optical transceiver is switched from one mode to another. The transmitter, the receiver and the optical loopback circuit may be disposed on a common substrate, or on separate substrates.

公开(公告)号：US11012153B2

公开(公告)日：2021-05-18

申请号：US16141813

申请日：2018-09-25

申请人： LEVEL 3 COMMUNICATIONS, LLC

发明人： Jeffrey K. Storey ,  John F. Waters ,  Andrew Dugan ,  Salvador Paredes ,  Gary Ratterree

IPC分类号： H04B10/079 ,  G02B6/293 ,  H04B10/035

摘要： Systems, methods, and devices are disclosed for monitoring optical communications between a managed location and a remote location. In particular, an optical signal is transmitted over an optical fiber and passed-through a test device. A portion of the optical signal is filtered from the original optical signal and passed to a monitoring unit. The monitoring unit may instruct one or more switches in the test device to loop the optical signal back toward the managed location. Subsequently, testing and monitoring may be performed at the managed location. The device may provide a test output or may transmit the information to the managed location.

公开(公告)号：US20210116295A1

公开(公告)日：2021-04-22

申请号：US16914117

申请日：2020-06-26

申请人： Skorpios Technologies, Inc.

发明人： Robert J. Stone ,  Stephen B. Krasulick

IPC分类号： G01J1/08 ,  G01R31/3187 ,  H04B10/073 ,  H04B10/035 ,  H04B10/077 ,  H04B17/00 ,  G01J1/42

摘要： A photonics system includes a transmit photonics module and a receive photonics module. The photonics system also includes a transmit waveguide coupled to the transmit photonics module, a first optical switch integrated with the transmit waveguide, and a diagnostics waveguide optically coupled to the first optical switch. The photonics system further includes a receive waveguide coupled to the receive photonics module and a second optical switch integrated with the receive waveguide and optically coupled to the diagnostics waveguide.

公开(公告)号：US10979140B2

公开(公告)日：2021-04-13

申请号：US16506571

申请日：2019-07-09

申请人： Mohammad Mehdi Mansouri Rad

发明人： Mohammad Mehdi Mansouri Rad

IPC分类号： H04B10/077 ,  H04J14/02 ,  H04B10/035 ,  G01H9/00

摘要： There is provided apparatuses to detect occurrence and location of damages on optical fiber links in advance by converting an optical span in optical network to an interferometry based sensing media. The interferometry based sensing media may enable detection of mechanical perturbation or mechanical vibration occurred on optical fiber links across optical network. The system employed with the interferometry based sensing media can detect occurrence of mechanical perturbation or mechanical vibration as well as discover the location of such event occurred using standard interferometry based sensing techniques.

公开(公告)号：US20200350987A9

公开(公告)日：2020-11-05

申请号：US16141813

申请日：2018-09-25

申请人： Level 3 Communications, LLC

发明人： Jeffrey K. Storey ,  John F. Waters ,  Andrew Dugan ,  Salvador Paredes ,  Gary Ratterree

IPC分类号： H04B10/079 ,  H04B10/035 ,  G02B6/293

摘要： Systems, methods, and devices are disclosed for monitoring optical communications between a managed location and a remote location. In particular, an optical signal is transmitted over an optical fiber and passed-through a test device. A portion of the optical signal is filtered from the original optical signal and passed to a monitoring unit. The monitoring unit may instruct one or more switches in the test device to loop the optical signal back toward the managed location. Subsequently, testing and monitoring may be performed at the managed location. The device may provide a test output or may transmit the information to the managed location.

公开(公告)号：US20190170572A1

公开(公告)日：2019-06-06

申请号：US16178840

申请日：2018-11-02

申请人： Skorpios Technologies, Inc.

发明人： Robert J. Stone ,  Stephen B. Krasulick

IPC分类号： G01J1/08 ,  H04B17/00 ,  H04B10/073 ,  G01J1/42 ,  G01R31/3187 ,  H04B10/077 ,  H04B10/035

CPC分类号： G01J1/08 ,  G01J1/42 ,  G01J2001/083 ,  G01J2001/4247 ,  G01R31/3187 ,  H04B10/035 ,  H04B10/0731 ,  H04B10/0779 ,  H04B17/0082

摘要： A photonics system includes a transmit photonics module and a receive photonics module. The photonics system also includes a transmit waveguide coupled to the transmit photonics module, a first optical switch integrated with the transmit waveguide, and a diagnostics waveguide optically coupled to the first optical switch. The photonics system further includes a receive waveguide coupled to the receive photonics module and a second optical switch integrated with the receive waveguide and optically coupled to the diagnostics waveguide.

公开(公告)号：US09755763B2

公开(公告)日：2017-09-05

申请号：US14800610

申请日：2015-07-15

申请人： ZTE Corporation

发明人： Zhensheng Jia ,  Yi Cai ,  Jianjun Yu

IPC分类号： H04B10/035 ,  H04B10/69 ,  H04B10/2575 ,  H04B10/61 ,  H04L25/03

CPC分类号： H04B10/6971 ,  H04B10/2575 ,  H04B10/61 ,  H04B10/616 ,  H04L25/03019 ,  H04L25/03261

摘要： Modulated optical signals are received in a coherent optical receiver employing both post digital filter and inter-symbol-interference (ISI) equalizer such as a maximum likelihood sequence estimation (MLSE) or Bahl-Cocke-Jelinek-Raviv (BCJR) algorithms. Some disclosed techniques are directed to adaptively adjusting the impulse response in time domain (or equivalently the frequency response in frequency domain) of the post digital filter and the corresponding structure of ISI equalizer in different spectrum-narrowing operation scenarios.

公开(公告)号：US20050259264A1

公开(公告)日：2005-11-24

申请号：US11078339

申请日：2005-03-14

申请人： Hiroaki Munehira ,  Junichi Nakagawa ,  Toshiyuki Tokura ,  Kenichi Asakawa ,  Hitoshi Mikada ,  Katsuyoshi Kawaguchi

发明人： Hiroaki Munehira ,  Junichi Nakagawa ,  Toshiyuki Tokura ,  Kenichi Asakawa ,  Hitoshi Mikada ,  Katsuyoshi Kawaguchi

IPC分类号： G08C15/04 ,  G01D21/00 ,  G01V1/22 ,  G08C19/00 ,  G08C23/04 ,  G08C25/00 ,  H04B10/03 ,  H04B10/035 ,  H04B10/075 ,  H04B10/278 ,  H04B10/297 ,  H04J14/00 ,  H04J14/02 ,  G02B7/182

CPC分类号： H04B10/291 ,  H04B10/0771 ,  H04B2210/074 ,  H04B2210/078

摘要： The present invention discloses a submarine observation system in which a plurality of carrier lights assigned to each submarine observation equipment is transmitted from a land terminal apparatus to an optical submarine cable (down-going) by using a WDM transmission. In the submarine observation equipment, only a prescribed carrier light is demultiplexed by an optical demultiplexer, an observation signal indicating an observation result is generated by an observation device, intensity of the carrier light demultiplexed by the optical demultiplexer is modulated by an optical amplifier based on an observation signal, and the modulated carrier light is multiplexed by an optical multiplexer. The multiplexed carrier light is output to the optical submarine cable (up-going) to be returned to the land terminal apparatus being the transmission station. The land terminal apparatus is able to obtain an observation signal of each observation point by separating carrier lights based on each wavelength and receiving a separated carrier light of each wavelength. Accordingly, the system can be structured with one optical fiber and can be extendable by increasing or decreasing carrier lights, and either one of the land terminal apparatuses can receive an observation signal even when the optical submarine cable is cut off.

摘要翻译： 本发明公开了一种潜艇观测系统，其中通过使用WDM传输将分配给每个潜艇观测设备的多个载波灯从陆地终端装置发送到光学海底电缆（下行）。 在潜艇观察设备中，仅通过光解复用器对规定的载波进行解复用，由观察装置产生表示观察结果的观测信号，由光解复用器解复用的载波的强度由基于 观测信号，并且调制载波用光复用器复用。 复用的载波光被输出到光学海底电缆（向上），以返回到作为发送站的陆地终端设备。 陆地终端装置能够通过基于每个波长分离载波来获得每个观测点的观测信号，并且接收每个波长的分离的载波。 因此，该系统可以由一根光纤构成，并且可以通过增加或减少载波来扩展，并且即使当光学海底电缆被切断时，陆上终端设备中的任一个也可以接收观测信号。