公开(公告)号：WO2022131384A1

公开(公告)日：2022-06-23

申请号：PCT/KR2020/018266

申请日：2020-12-14

Applicant: 엘지전자 주식회사

Inventor： 김자영 ,  이상림 ,  안병규 ,  이호재 ,  김성진

IPC: H04L9/08 ,  H04L9/00 ,  H04B10/70 ,  H04B10/532

Abstract: 본 명세서에서는 양자 암호 통신 시스템에서, 장치에 의해 수행되는, QBER(quantum bit error rate)을 추정하는 방법에 있어서, 다른 장치로부터 RA(random access) 프리앰블을 수신하고, 상기 RA 프리앰블에 대한 응답으로 상기 다른 장치에게 RAR(random access response)를 전송하고, 상기 다른 장치와 RRC(radio resource control) 연결 절차를 수행하고, 상기 다른 장치로부터 데이터를 수신하고 및 키 정보에 기반하여 상기 데이터를 복호화하되, 상기 장치는 양자 채널을 통해 상기 다른 장치로부터 비트 정보가 저장된 펄스를 수신하고, 상기 비트 정보가 저장된 펄스는 회전 각 변이 또는 편광 변이가 적용된 펄스이고, 상기 장치는 상기 비트 정보가 저장된 펄스에 기반하여 상기 키 정보를 생성하고, 상기 장치는 상기 키 정보에 기반하여 상기 QBER을 추정하고, 및 상기 추정된 QBER의 값이 임계 값 보다 낮음에 기반하여, 상기 장치는 상기 키 정보를 유효한 것으로 결정하는 것을 특징으로 하는 방법이 제공된다.

公开(公告)号：WO2022119687A1

公开(公告)日：2022-06-09

申请号：PCT/US2021/058064

申请日：2021-11-04

Applicant: RAYTHEON COMPANY

Inventor： KOWALEVICZ, Andrew ,  GRACEFFO, Gary, M. ,  DOLGIN, Benjamin, P.

IPC: H04B10/40 ,  H04B10/532

Abstract: Monostatic optical transceivers, systems, and methods of operating the same include a single aperture, a transmitter that provides a modulated and polarized optical transmit beam, a receiver that receives a modulated and polarized optical receive beam at an optical resonator included therein and processes the received optical receive beam to determine information from the received optical receive beam, a polarizing beam splitter that reflects the optical transmit beam, a polarization rotator that rotates the polarization of the reflected optical transmit beam by a fixed number of degrees in a transmit direction in a coordinate system of the monostatic transceiver, and a waveplate that modifies the polarization of the rotated optical transmit beam.

公开(公告)号：WO2022053922A1

公开(公告)日：2022-03-17

申请号：PCT/IB2021/058066

申请日：2021-09-03

Applicant: CIENA CORPORATION ,  REIMER, Michael

Inventor： OVEIS GHARAN, Shahab ,  HARLEY, James

IPC: H04B10/516 ,  H04B10/532 ,  H04B10/54

Abstract: A transmitter (102,200) maps an N-bit sequence to a point selected from a four-dimensional (4D) constellation consisting of 2N points which form a subset of a Cartesian product of first and second two-dimensional (2D) constellations, the first constellation consisting of M1 points divided into first, second, and third points, and the second constellation consisting of M2 points divided into fourth, fifth, and sixth points, wherein M1, M2 ≥ 5, and wherein log2(M1×M2) > N. The subset includes any 4D point that is generated by combining any one of the M1 points and any one of the fourth points; includes any 4D point that is generated by combining any one of the first points and any one of M2 points; and excludes any 4D point that is generated by combining any third point and any sixth point. An optical signal (204) representing the selected point is transmitted to a receiver (104,300).

公开(公告)号：WO2021078723A1

公开(公告)日：2021-04-29

申请号：PCT/EP2020/079471

申请日：2020-10-20

Applicant: UNIVERSITÀ DEGLI STUDI DI PADOVA

Inventor： VALLONE, Giuseppe ,  AGNESI, Costantino ,  AVESANI, Marco ,  VILLORESI, Paolo

IPC: H04B10/532 ,  H04B10/70 ,  H04B10/85

Abstract: A polarization modulation method of photonic pulses, in particular for generating quantum cryptographic keys, ensures an optimum stability of the outgoing polarization states, and comprises the steps of: generating a plurality of photonic pulseswith an unspecified polarization state obtained by the overlapping of both the horizontal and vertical polarization modes thereof, and routing them in a first polarization-maintaining fiber; splittingsaid horizontal and vertical polarization modes and routing them in respective terminals of a second polarization-maintaining fiber forming a ring, whereby they travel such ring clockwise and counter-clockwise respectively, or vice versa; inducing a respective phase modulation (øe,øl) of both said polarization modes, in one point of said ring which is spaced from said terminals by optical paths having different length along said ring, thereby a polarization-maintaining fiber delay line is determined; and recombining said polarization modes in one single photonic pulse beam, and routing the resulting beam through said first polarization-maintaining fiber, by obtaining, at the output thereof, a polarization state of the pulses depending upon the difference between said phase modulations (øe,øl).

公开(公告)号：WO2020030847A1

公开(公告)日：2020-02-13

申请号：PCT/FI2018/050580

申请日：2018-08-10

Applicant: NOKIA TECHNOLOGIES OY

Inventor： BITAULD, David

IPC: H04B10/532 ,  H04B10/079 ,  H04B10/70 ,  H04L9/08 ,  H04J14/06 ,  G02B6/293 ,  G02F1/21

Abstract: In accordance with an example embodiment of the present invention, there is provided an apparatus (160) comprising two inputs configured to receive two optical signals from two fibres (155, 157) from two respective optical transmitters, a beam splitter configured to convert the optical signals into dual rail form, the apparatus being configured to cause the optical signals to interfere with each other, a plurality of single photon detectors configured to measure the dual rail form optical signals, and at least one processing core configured to obtain compensation adjustment information concerning the two fibres and to inform the optical transmitters of the compensation adjustment information.

公开(公告)号：WO2019014203A1

公开(公告)日：2019-01-17

申请号：PCT/US2018/041416

申请日：2018-07-10

Applicant: QUALCOMM INCORPORATED

Inventor： LEI, Jing ,  SUN, Jing ,  KADOUS, Tamer

IPC: H04L27/36 ,  H04L27/34 ,  H04B10/532 ,  H04J14/06 ,  H04B7/10 ,  H04B7/0408 ,  H04L27/26

Abstract: Certain aspects of the present disclosure generally relate to wireless communication. More particularly, aspects of the present disclosure provide multiplexing schemes which may be suited for the single carrier waveform. For example, some techniques and apparatuses described herein permit multiplexing of multiple, different data streams without destroying the single-carrier properties of the waveform. Additionally, or alternatively, some techniques and apparatuses described herein may provide unequal error protection, unequal bandwidth allocation, and/or the like as part of the multiplexing schemes. Examples of multiplexing schemes described herein include in-phase/quadrature (I/Q) multiplexing, superposition quadrature amplitude modulation (QAM) based at least in part on layered bit mapping, polarization division multiplexing of QAM with superposition coding, and frequency division multiplexing using UE-specific beams.

公开(公告)号：WO2018104543A1

公开(公告)日：2018-06-14

申请号：PCT/EP2017/082140

申请日：2017-12-11

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

Inventor： BAIER, Moritz ,  SCHELL, Martin ,  SOARES, Francsico

IPC: G02F1/025 ,  H04B10/532 ,  G02F1/017

Abstract: This invention relates to a modulator assembly for modulating light, comprising a first and a second electro-absorption modulator (11, 12) which each at least substantially only act on a polarization component (TE) of incident light (L1, L3); a light generating assembly (2) for generating light (L1) which includes a first and a second polarization component (TE, TM); a first electro-absorption modulator (11) for modulating the light (L1) generated by the light generating assembly (2), wherein the first electro-absorption modulator (11) at least substantially only modulates the first polarization component (TE) of the light (L1), so that the light (L2) exiting from the first electro-absorption modulator (11) includes a modulated and an unmodulated polarization component (MK, UK); a polarization converter (3) for changing the polarization direction of the light (L2) exiting from the first electro-absorption modulator (11), wherein the light (L3) exiting from the polarization converter (3) couples into the second electro-absorption modulator (12) and is polarized such that by means of the second electro-absorption modulator (12) a modulation at least substantially is effected only of the previously unmodulated polarization component (UK). The invention also relates to a method for modulating light.

公开(公告)号：WO00031903A1

公开(公告)日：2000-06-02

申请号：PCT/FR1999/002815

申请日：1999-11-17

IPC: G02F1/01 ,  H04B10/532 ,  H04N7/22 ,  H04B10/135 ,  H04B10/18

CPC classification number: H04B10/532

Abstract: The invention aims at providing in an optical fibre transmission system without repeater stations amplitude modulating means associated with polarization scrambling means, thereby enabling to limit the power backscattered by Brillouin effect, or to increase the power injected into the communication link. The invention is applicable both to light waves transporting information and to pump light waves.

Abstract translation: 本发明旨在提供一种光纤传输系统，而不需要与偏振加扰装置相关联的中继站幅度调制装置，从而能够限制由布里渊效应反向散射的功率，或增加注入通信链路的功率。 本发明既适用于传输信息的光波，也适用于泵浦光波。

公开(公告)号：WO00001097A1

公开(公告)日：2000-01-06

申请号：PCT/DE1999/001864

申请日：1999-06-25

IPC: H04B10/2513 ,  H04B10/2581 ,  H04B10/532 ,  H04J14/02 ,  H04J14/06 ,  H04B10/13 ,  H04B10/18

CPC classification number: H04B10/2513 ,  H04B10/2581 ,  H04B10/532 ,  H04J14/02 ,  H04J14/06

Abstract: The invention relates to a method for optically transmitting data via optical waveguides during which the electric signal (Sel) or optical information signal (Sopt) to be transmitted is split into a plurality of partial signals (Sel1 to Seln) each having a lower bandwidth. In addition, each partial signal (Sel1 to Seln) is converted into an optical partial signal (Sopt1 to Soptn) each having different medium wave lengths ( lambda 1 to lambda n) or having an optical carrier frequency and/or having a different orthogonal polarization. Optical partial signals (Sopt1 to Soptn) are transmitted on an optical waveguide which forms the transmission path (7). The optical partial signals (Sopt1 to Soptn) are each separately detected again at the end of the transmission path (7) and are composed into the information signal (Sel) to be transmitted. The invention also relates to a transmitting unit, a receiving unit, and to a complete system for carrying out the inventive method.

Abstract translation: 是本发明通过光波导涉及一种用于光数据传输的方法，其中，所发送的电（SEL）或光信息信号（SOPT）分成几个部分信号（卖给器SELn）划分的每个具有较小的带宽，其中每个信号元件（卖给器SELn） （向上Soptn SOPT1）中的光分量信号各具有不同中心波长被转换（拉姆达1至拉姆达N）或光载波频率和/或不同的正交偏振，其特征在于，传输路径上的光学子信号（SOPT1到Soptn）（7）形成光波导 被发送，并且其中，所述光学子信号（SOPT1到Soptn）在传输链路（7）的端部是在每种情况下再次分别检测和组装成的信息将被发送的信号（SEL）。 此外，本发明提供了一种发送单元和接收单元，以及用于实现本发明的方法涉及整个系统。

公开(公告)号：WO2022271521A1

公开(公告)日：2022-12-29

申请号：PCT/US2022/033739

申请日：2022-06-16

Applicant: CIENA CORPORATION

Inventor： DJUKIC, Petar ,  PEI, Yinqing ,  AMIRI, Maryam

IPC: H04B11/00 ,  H04B10/25 ,  H04B10/275 ,  H04B10/532 ,  H04B10/615 ,  H04R23/008

Abstract: An optical network element includes a connection to an optical fiber in an optical line system including a coherent receiver; a microphone configured to detect sound; and circuitry connected to the microphone and configured to cause transmission of information related to sounds detected by the microphone to a receiver at an end of the optical line system, wherein the transmission is over the optical fiber in the optical line system to the coherent receiver. The optical network element can include a polarization controlling device connected to the circuitry and configured to modulate a state-of-polarization (SOP) envelope for the transmission.