公开(公告)号：EP3695255B1

公开(公告)日：2024-09-25

申请号：EP18865958.5

申请日：2018-10-12

IPC: G02B6/293 ,  G02B6/12 ,  G02B6/34 ,  H04J14/02 ,  G02B6/42 ,  H04B10/2507 ,  G02B6/27 ,  H04B10/40 ,  H04J14/06

CPC classification number: H04B10/2572 ,  H04J14/0256 ,  H04B10/40 ,  H04J14/06 ,  G02B6/4214 ,  G02B6/4215 ,  G02B6/4213 ,  G02B6/34 ,  G02B6/29397 ,  G02B6/2773 ,  G02B6/29362

公开(公告)号：EP3675390B1

公开(公告)日：2024-08-14

申请号：EP18306856.8

申请日：2018-12-27

IPC: H04B10/079 ,  H04B10/61 ,  H04J14/06

CPC classification number: H04B10/07955 ,  H04B10/6162 ,  H04J14/06

公开(公告)号：EP2892167B1

公开(公告)日：2018-10-17

申请号：EP13833085.7

申请日：2013-03-22

Applicant: National Institute of Information and Communications Technology

Inventor： KAWANISHI, Tetsuya ,  AWAJI, Yoshinari ,  PUTTNAM, Ben ,  KANNO, Atsushi

IPC: H04B10/63 ,  G02B6/02 ,  G02B6/04 ,  H04J14/00 ,  H04J14/04 ,  H04J14/06 ,  H04B10/25 ,  H04B10/61

CPC classification number: H04B10/2504 ,  G02B6/02 ,  G02B6/02042 ,  G02B6/04 ,  H04B10/61 ,  H04B10/63 ,  H04J14/00 ,  H04J14/04 ,  H04J14/06

Abstract: To provide a self-homodyne detection communication system capable of using a space-division multiplexing signal as a signal for communication. The present invention relates to a space-division multiplexing apparatus 12 including a multi-core fiber 11 having multiple cores. The space-division multiplexing apparatus 12 uses cores other than a core 13 for self-homodyne detection among the multiple cores included in the multi-core fiber 11 as cores 16 for communication. The space-division multiplexing apparatus is configured to include a pilot-tone guiding unit 14 and a self-homodyne detection unit 15.

公开(公告)号：EP2816744B1

公开(公告)日：2018-08-29

申请号：EP14172540.8

申请日：2014-06-16

Applicant: ZTE (USA) Inc.

Inventor： CAI, Yi

IPC: H04B10/2569 ,  H04B10/61

CPC classification number: H04B10/2572 ,  H04B10/2569 ,  H04B10/6162 ,  H04J14/02 ,  H04J14/06

Abstract: An improved method and apparatus for reducing performance degradation in optical fiber transmission system due to polarization mode dispersion and nonlinear polarization coupling. Digital polarization scrambling with transmit and receive digital signal processing is used to reduce these effects. By performing digital polarization scrambling on all possible states of polarization with respect to the two principle axes of an optical fiber, the SOP dependent penalty is averaged out. The invention also provides a method and apparatus for performing digital polarization scrambling on the transmit side and blinded polarization tracking or synchronized polarization descrambling at the receive side. Using a configurable scrambling speed, the invention works as a polarization scanner low speed SOP rotation or as a scrambler at fast SOP rotation speeds. Synchronization of the transmit scramble and the receive descrambler is achieved with scrambling and descrambling control modules based on a common pseudo random bit sequence.

公开(公告)号：EP3334066A1

公开(公告)日：2018-06-13

申请号：EP15902013.0

申请日：2015-08-27

Applicant: Huawei Technologies Co., Ltd.

Inventor： ZHOU, Enbo ,  LIANG, Yuanjun ,  ZUO, Tianjian ,  ZHANG, Liang

IPC: H04B10/61

CPC classification number: H04B10/613 ,  H04B10/5053 ,  H04B10/61 ,  H04B10/616 ,  H04B10/6165 ,  H04J14/06

Abstract: According to an optical signal processing method and a coherent receiver that are provided in this application, a signal XI and a signal YI are added up to obtain a signal I; a signal XQ and a signal YQ are added up to obtain a signal Q; and quantization, combination, and digital signal processing are performed on the I and the Q. After summation, two signals need to be quantized. Therefore, a quantity of ADCs is reduced by half. In addition, because power consumption of a summation component is less than that of an ADS, power consumption of optical signal processing can be reduced. In addition, because there is a preset value, the summation may be performed after phase-inversion is performed on one analog signal, thereby avoiding a signal loss caused by the summation. It can be learned that, according to the method and the coherent receiver in this application, receive power consumption of an optical signal can be reduced while normal reception of the optical signal is ensured.

公开(公告)号：EP3334063A1

公开(公告)日：2018-06-13

申请号：EP16832515.7

申请日：2016-08-01

Applicant: NEC Corporation

Inventor： NAKANO, Takehiro

IPC: H04B10/03 ,  H04B10/516

CPC classification number: H04B10/03 ,  H04B10/25 ,  H04B10/516 ,  H04J14/06

Abstract: To enable the transmission and reception of a super-channel optical signal to continue maintaining the possible transmission capacity without providing a redundant configuration in advance even though a failure occurs in a subcarrier, an optical transmitter 10 of the present invention includes a splitting means 20 for splitting an inputted client signal so as to make frequency efficiency in optical modulation means optimized; optical modulation means 31 to 3N for modulating one of subcarriers having mutually different wavelengths with the client signal output; a multiplexing means 40 for multiplexing the modulated signals and outputting a super-channel optical signal; and a control means 50, in a state where a failure occurs in one of the subcarriers, for making a split client signal output to modulation means corresponding to a subcarrier having no failure and applying a modulation method with a higher frequency efficiency to at least one of the modulation means.

公开(公告)号：EP2649739B1

公开(公告)日：2018-05-09

申请号：EP11794366.2

申请日：2011-12-01

Applicant: Alcatel Lucent

Inventor： LIU, Xiang ,  SETHUMADHAVAN, Chandrasekhar

IPC: H04J14/06 ,  H04L27/26

CPC classification number: H04B10/61 ,  H04J14/06 ,  H04L27/2605 ,  H04L27/265 ,  H04L27/2697

Abstract: A coherent optical receiver for a data-frame format in which a data frame has two or more pilot-symbol blocks, each having a cyclic prefix or suffix, and one or more payload-symbol blocks, each of which is concatenated with at least one adjacent block without a guard interval between them. The receiver uses optical signals corresponding to the pilot-symbol blocks to perform data-frame synchronization, frequency-offset correction, and channel-estimation procedures, which are robust even in the presence of certain transmission impairments. The receiver applies block-overlap processing with a sliding window to recover the payload data in a manner that substantially cancels the adverse effects of inter-block interference caused by the absence of guard intervals in the payload portion of the data frame. In one embodiment, the receiver performs channel-estimation and block-overlap processing for polarization-division-multiplexed signals in a manner that enables a combined, intertwined application of channel-response-compensation and polarization-demultiplexing procedures.

公开(公告)号：EP3289407A4

公开(公告)日：2018-05-02

申请号：EP16795788

申请日：2016-04-28

Applicant: HUAWEI TECH CO LTD

Inventor： WEN YANGJING ,  ZHU FEI ,  BAI YUSHENG

IPC: H04B10/50 ,  G02F1/01 ,  H04B10/2575 ,  H04B10/272

CPC classification number: H04J14/06 ,  G02F1/21 ,  G02F2001/211 ,  G02F2203/06 ,  H04B10/2575 ,  H04B10/272 ,  H04B10/505 ,  H04J2014/0253

Abstract: An apparatus comprising an optical input configured to receive an optical carrier, an polarization beam splitter configured to forward a first polarized component of the optical carrier along a first light path, and forward a second polarized component of the optical carrier along a second light path, wherein the first polarized component comprises a first polarization that is perpendicular to a second polarization of the second polarized component upon exiting the optical splitter, and an optical modulator coupled to the first light path and the second light path, the modulator configured to modulate the first polarized component of the optical carrier and the second polarized component of the optical carrier.

公开(公告)号：EP3298707A1

公开(公告)日：2018-03-28

申请号：EP16734733.5

申请日：2016-05-17

Applicant: Politecnico di Milano

Inventor： MARTINELLI, Mario ,  SPAGNOLINI, Umberto

IPC: H04B10/532 ,  H04J14/06

CPC classification number: H04J14/0245 ,  H04B10/2587 ,  H04B10/27 ,  H04B10/272 ,  H04B10/50 ,  H04B10/60 ,  H04J14/06

Abstract: An apparatus for transmitting optical signals between a central unit (1) and at least one remote unit (2), said central unit comprising—at least one amplified spontaneous emission source (11, 110) of an optical signal, first means (17, 170) adapted to polarize the optical signal deriving from the amplified spontaneous emission source in a first polarization plane by forming a first polarized optical signal (POS). The apparatus comprises second means (24) configured to receive said first polarized optical signal and to polarize it in a second polarization plane, orthogonal to the first plane, by forming in said first means a second optical signal (SOS) which is orthogonally polarized with respect to the first optical signal (17).

公开(公告)号：EP3289407A1

公开(公告)日：2018-03-07

申请号：EP16795788.5

申请日：2016-04-28

Applicant: Huawei Technologies Co., Ltd.

Inventor： WEN, Yangjing ,  ZHU, Fei ,  BAI, Yusheng

IPC: G02F1/01 ,  G02B27/28

CPC classification number: H04J14/06 ,  G02F1/21 ,  G02F2001/211 ,  G02F2203/06 ,  H04B10/2575 ,  H04B10/272 ,  H04B10/505 ,  H04J2014/0253

Abstract: An apparatus comprising an optical input configured to receive an optical carrier, an polarization beam splitter configured to forward a first polarized component of the optical carrier along a first light path, and forward a second polarized component of the optical carrier along a second light path, wherein the first polarized component comprises a first polarization that is perpendicular to a second polarization of the second polarized component upon exiting the optical splitter, and an optical modulator coupled to the first light path and the second light path, the modulator configured to modulate the first polarized component of the optical carrier and the second polarized component of the optical carrier.