Global Patent Index - EP 3881452 A4

EP 3881452 A4 20220824 - SECURED FIBER LINK SYSTEM

Title (en)

SECURED FIBER LINK SYSTEM

Title (de)

GESICHERTES FASERVERBINDUNGSSYSTEM

Title (fr)

SYSTÈME DE LIAISON PAR FIBRE SÉCURISÉ

Publication

EP 3881452 A4 20220824 (EN)

Application

EP 19884210 A 20191108

Priority

  • US 201816190801 A 20181114
  • US 2019060465 W 20191108

Abstract (en)

[origin: WO2020102020A1] A system and method for securing communication over an optical fiber are disclosed. The system includes a transmit spatial multiplexer configured to couple optical signals into spatial paths of an optical fiber, a first of the plurality of optical signals is an optically modulated version of a desired sequence of information that is intended to be transferred over the optical fiber and it is coupled into a first of the spatial paths; a second one of the plurality of optical signals is an optical chaff signal and it is coupled into a second spatial path different from the first one, and a third optical signal is an optical signal for use by an optical time domain reflectometer (OTDR) that is coupled into one of the spatial paths of the optical fiber, whereby a tap along the fiber cannot determine the transmitted desired sequence of information.

IPC 8 full level

H04B 10/071 (2013.01); H04B 10/25 (2013.01); H04B 10/85 (2013.01)

CPC (source: EP)

H04B 10/071 (2013.01); H04B 10/85 (2013.01)

Citation (search report)

Designated contracting state (EPC)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

DOCDB simple family (publication)

WO 2020102020 A1 20200522; CN 113243089 A 20210810; CN 113243089 B 20240514; CN 118282492 A 20240702; EP 3881452 A1 20210922; EP 3881452 A4 20220824; JP 2022507482 A 20220118

DOCDB simple family (application)

US 2019060465 W 20191108; CN 201980083271 A 20191108; CN 202410516510 A 20191108; EP 19884210 A 20191108; JP 2021526453 A 20191108