公开(公告)号：US11218226B2

公开(公告)日：2022-01-04

申请号：US16557059

申请日：2019-08-30

申请人： CORNING INCORPORATED

发明人： Ming-Jun Li ,  Daniel Aloysius Nolan

IPC分类号： H04B10/12 ,  H04B10/70 ,  H04B10/2513 ,  H04B10/2525 ,  H04B10/2507 ,  H04L9/08 ,  H04B10/25

摘要： A quantum communications system includes a quantum key generation system having a photonic quantum bit generator, a dispersion compensating optical fiber link, and a photon detector unit and a communications network having a signal generator, a signal channel, and a signal receiver. The dispersion compensating optical fiber link extends between and optically couples the photonic quantum bit generator and the photon detector unit. Further, the dispersion compensating optical fiber link is structurally configured to induce dispersion at an absolute dispersion rate of about 9 ps/(nm)km or less and induce attenuation at an attenuation rate of about 0.18 dB/Km or less such that the quantum key bit information of a plurality of photons output by the one or more photonic quantum bit generators is receivable at the photon detector unit at a bit rate of at least about 10 Gbit/sec.

公开(公告)号：US11146337B2

公开(公告)日：2021-10-12

申请号：US16977960

申请日：2018-11-27

申请人： NEC Corporation

发明人： Shingo Kuboki

IPC分类号： H04B10/04 ,  H04B10/12 ,  H04B10/516 ,  H04B10/40

摘要： A feedback proportional control repeats the following processing of starting control of an optical modulator by a control signal that corresponds to a reference value set in the preliminary search or in the previous cycle, calculating a new reference value based on an error signal obtained from the optical modulator, and controlling the optical modulator by the control signal that corresponds to the new reference value, thereby acquiring the control signal in which the error signal is minimized as an optimal control signal, setting the acquired control signal as a signal for controlling the optical modulator, and storing the optimal control signal as the reference value to be used at a time of starting the feedback proportional control in the next cycle.

公开(公告)号：US11088759B2

公开(公告)日：2021-08-10

申请号：US16880185

申请日：2020-05-21

申请人： EXFO Oy

发明人： Vesa Kyllönen ,  Sakari Yrttiaho ,  Daniel Gariepy ,  Gang He

IPC分类号： H04B10/12 ,  H04B10/25 ,  H04J14/02

摘要： There is provided a system and a method for extracting data traffic from an optical communication fiber by extracting a portion of the optical signal(s) propagating in the optical communication fiber, carrying the extracted signal over an optical fiber, amplifying the extracted optical signal and filtering the amplified signal to select one channel carrying data traffic. The optically-carried data traffic may then be input to an optical communication transceiver for converting the optically-carried data traffic into electrical data traffic, which carried data can be analyzed for data traffic monitoring applications.

公开(公告)号：US10819431B2

公开(公告)日：2020-10-27

申请号：US16308361

申请日：2016-06-08

申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.

发明人： Christian Schmidt ,  Volker Jungnickel

IPC分类号： H04B10/12 ,  H04B10/2507 ,  H04J14/04 ,  H04B10/67 ,  H04B3/32

摘要： It are provided an optical communication system and an optical communication method. The system comprising at least two optical channels for communicating optical data signals; at least one optical filter arrangement for compensating distortions of the optical data signals communicated via the optical channels and/or crosstalk between the optical channels. The optical filter arrangement comprises at least one optical filter assigned to one of the optical channels and at least one optical filter assigned to the other one of the optical channels, wherein each one of the optical filters is configurable in such a way that different wavelength components of an incoming optical signal will be modified individually.

公开(公告)号：US10541754B2

公开(公告)日：2020-01-21

申请号：US14310280

申请日：2014-06-20

申请人： Sumitomo Electric Lightwave Corp. ,  Sumitomo Electric Industries, LTD

发明人： Tsutomu Watanabe ,  William Dmytro Charuk ,  Jamie Joshue Seawell ,  Yukihiro Yokomachi

IPC分类号： H04B10/12 ,  H04B10/27 ,  H04B10/25 ,  H04B10/40 ,  G02B6/38 ,  G02B6/44 ,  G02B6/42

摘要： Optical fiber networks, devices, and related methods are disclosed herein. In some aspects, an optical fiber network includes network devices having optical fibers for transmitting and receiving data. In the network, 100% of the optical fibers are utilized end-to-end across the plurality of network devices. Networks herein are also devoid of converters and include only a single direction connection between fibers at interconnect points between devices. Network devices may include ferrules, where at least some of the ferrules are devoid of an optical fiber. A method for providing an optical fiber network includes providing network devices having optical fibers for transmitting and receiving data and transmitting data using 100% of the optical fibers end-to-end across the network devices.

公开(公告)号：US10090921B2

公开(公告)日：2018-10-02

申请号：US15302145

申请日：2015-04-10

申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION ,  NTT Electronics Corporation

发明人： Mikio Yoneyama ,  Hiroto Kawakami ,  Takashi Ono ,  Akihiko Matsuura ,  Tomoyoshi Kataoka ,  Katsuya Tanaka ,  Masahiro Tachibana ,  Yuya Oyama

IPC分类号： H04B10/12 ,  H04B10/04 ,  H04B10/00 ,  H04B10/079 ,  H04B10/516 ,  H04L27/36 ,  H04J14/08 ,  H04B10/564 ,  G02F1/01

摘要： A light modulation device detects a power of the modulated optical signal modulated by each of an I-component optical modulator and a Q-component optical modulator, synchronously-detects a component of a frequency fd from the power of the modulated optical signal, outputs a dither signal of a frequency fd/n (where n is a positive integer equal to or larger than 1) applied to a first bias voltage or a second bias voltage when adjusting the first bias voltage or the second bias voltage, outputs two dither signals having a frequency fd/m (where m is a positive integer equal to or larger than 1, where n

公开(公告)号：US10027409B2

公开(公告)日：2018-07-17

申请号：US14774940

申请日：2014-03-03

申请人： PHILIPS LIGHTING HOLDING B.V.

发明人： Ronald Rietman ,  Stephanus Joseph Johannes Nijssen

IPC分类号： H04B10/00 ,  H04B10/04 ,  H04B10/12 ,  H04B10/116 ,  H04B10/556

摘要： The invention provides a communication system (500), a lighting system, a method of transmitting information and a computer program product. The communication system according to the invention is configured for transmitting data via visible light. The communication system comprises a signal generator (530) for generating a light driving signal (200) being a frequency shift key modulated signal comprising a sequence of signal parts (215, 225), each signal part being modulated at a first or second frequency in accordance with the data, the signal parts modulated at the first frequency having first pulses in first periods (T0) and the signal parts modulated at the second frequency having second pulses in second periods (T1). Energy of the visible light corresponding to a pulse in a respective period has center of gravity in time. The pulses in the periods are positioned so that the center of gravity is at the center of the period for reducing human-perceivable frequency components in the visible light driving signal.

公开(公告)号：US09941963B2

公开(公告)日：2018-04-10

申请号：US15309113

申请日：2014-05-12

申请人： Telefonaktiebolaget LM Ericsson (publ)

发明人： Roberto Magri ,  Enrico Forestieri ,  Marco Secondini ,  Domenico Marsella

IPC分类号： H04B10/12 ,  H04B10/2513 ,  H04B10/2507 ,  H04B10/2531 ,  H04B10/079 ,  H04L25/03

CPC分类号： H04B10/25133 ,  H04B10/07951 ,  H04B10/07955 ,  H04B10/25073 ,  H04B10/2531 ,  H04L25/03191

摘要： A method (10) of non-linear propagation impairment equalization, the method comprising the steps of: a. receiving (12) communications traffic carried by an optical communications signal transmitted over an optical communications link; b. generating (14) a time dependent filter representation of a nonlinear time-variant impulse response of the inverse of the optical communications link; and c. applying (16) the time dependent filter representation to the received communications traffic to form non-linear propagation impairment equalized communications traffic. An optical communications link nonlinear propagation impairment equalizer and optical communications signal receiver apparatus are also provided.

公开(公告)号：US09846275B2

公开(公告)日：2017-12-19

申请号：US14862648

申请日：2015-09-23

申请人： Corning Incorporated

发明人： Ming-Jun Li ,  Snigdharaj Kumar Mishra ,  Michal Mlejnek ,  William Allen Wood ,  Aramais Robert Zakharian

IPC分类号： H04B10/12 ,  G02B6/02 ,  G02B6/028 ,  G02B6/036 ,  H04B10/2581 ,  H04B10/2543

CPC分类号： G02B6/02019 ,  C03B2201/12 ,  C03B2201/50 ,  C03B2203/22 ,  C03B2203/23 ,  C03B2203/24 ,  G02B6/02023 ,  G02B6/02309 ,  G02B6/0281 ,  G02B6/0288 ,  G02B6/03622 ,  G02B6/03638 ,  G02B6/0365 ,  H04B10/2543 ,  H04B10/2581

摘要： A quasi-single-mode optical fiber with a large effective area is disclosed. The quasi-single-mode fiber has a core with a radius greater than 5 μm, and a cladding section configured to support a fundamental mode and a higher-order mode. The fundamental mode has an effective area greater than 170 μm2 and an attenuation of no greater than 0.17 dB/km at a wavelength of 1530 nm. The higher-order mode has an attenuation of at least 1.0 dB/km at the wavelength of 1530 nm. The quasi-single-mode optical fiber has a bending loss of less than 0.02 dB/turn for a bend diameter of 60 mm for a wavelength of 1625 nm.

公开(公告)号：US09780883B2

公开(公告)日：2017-10-03

申请号：US14631778

申请日：2015-02-25

申请人： Tyco Electronics Subsea Communications LLC

发明人： Hongbin Zhang ,  Hussam G. Batshon

IPC分类号： H04B10/04 ,  H04B10/12 ,  H04B10/516 ,  H04L27/34 ,  H04L27/36 ,  H04B10/556 ,  H04L27/18

CPC分类号： H04B10/5161 ,  H04B10/541 ,  H04B10/5561 ,  H04B10/616 ,  H04B10/69 ,  H04L27/183 ,  H04L27/3405 ,  H04L27/3472 ,  H04L27/367

摘要： A system and method including multi-dimensional coded modulation wherein symbols within successive blocks of symbols are mapped using at least two different constellations to differentiate the symbols from each other. At least one data bit is encoded by an order of the symbols within each block of symbols. The receiver decodes the data by decoding at least one bit from the order of the symbols mapped with the first and second constellations.