EP 1175743 A4 20030730 - INTRINSIC SECURING OF FIBRE OPTIC COMMUNICATION LINKS
Title (en)
INTRINSIC SECURING OF FIBRE OPTIC COMMUNICATION LINKS
Title (de)
EIGENSICHERE SICHERUNG VON FASEROPTISCHEN ÜBERTRAGUNGSVERBINDUNGEN
Title (fr)
PROTECTION INTRINSEQUE DES LIAISONS DE COMMUNICATION A FIBRES OPTIQUES
Publication
Application
Priority
- AU 0000382 W 20000428
- AU PQ012699 A 19990503
Abstract (en)
[origin: WO0067400A1] An optical waveguide system for securing live fibres against tampering and tapping off of data in optical fibre communication links is disclosed. The communication link includes a waveguide (1000) which extends from one location to another for transmitting a data signal. A data transmitter (20) launches the data signal into the fibre (1000) and a data receiver (22) receives the data signal. A sensing signal transmitter (40) launches a sensing signal into the fibre (1000) and a sensing signal receiver (42) receives the sensing signal for the fibre (1000). The transmitters (20 and 40) are coupled to the fibre (1000) by wavelengths multiplexing/demultiplexing coupler (30) via input arms (76 and 66) of the coupler (30). The signals are transferred to the receivers (22 and 42) by a further wavelength multiplexing/demultiplexing coupler (32) via output arms (7c and 6c). The couplers (30 and 32) ensure that the signals are combined with minimum power loss and are separated for transmission to the detectors also with minimum power loss and with substantially all of the data signal being transmitted to the receiver (22) and all the sensing signal being transmitted to the receiver (42).
IPC 1-7
IPC 8 full level
G01M 5/00 (2006.01); G01M 11/00 (2006.01); H04B 10/07 (2013.01); H04B 10/071 (2013.01); H04B 10/077 (2013.01); H04B 10/08 (2006.01); H04J 14/00 (2006.01); H04J 14/02 (2006.01)
CPC (source: EP KR)
G01M 5/0025 (2013.01 - EP); G01M 5/0033 (2013.01 - EP); G01M 5/0066 (2013.01 - EP); G01M 5/0091 (2013.01 - EP); G01M 11/335 (2013.01 - EP); H04B 10/25 (2013.01 - KR); H04B 10/2507 (2013.01 - KR)
Citation (search report)
- [XAY] EP 0332473 A1 19890913 - BRITISH TELECOMM [GB]
- [XAY] EP 0293086 A1 19881130 - BRITISH TELECOMM [GB]
- [YA] FR 2453403 A1 19801031 - BERTIN & CIE
- [YA] FR 2520114 A1 19830722 - LIGNES TELEGRAPH TELEPHON [FR]
- [YA] EP 0836343 A2 19980415 - NORTHERN TELECOM LTD [CA]
- See references of WO 0067400A1
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
WO 0067400 A1 20001109; AU PQ012699 A0 19990527; CA 2371576 A1 20001109; CN 1349689 A 20020515; EP 1175743 A1 20020130; EP 1175743 A4 20030730; IL 146075 A0 20020725; IL 146075 A 20041215; JP 2002543738 A 20021217; KR 20020026863 A 20020412
DOCDB simple family (application)
AU 0000382 W 20000428; AU PQ012699 A 19990503; CA 2371576 A 20000428; CN 00807083 A 20000428; EP 00920265 A 20000428; IL 14607500 A 20000428; JP 2000616144 A 20000428; KR 20017014026 A 20011102