AU2001240645A1 - Optical communication system with two parallel transmission paths - Google Patents

Optical communication system with two parallel transmission paths

Info

Publication number
AU2001240645A1
AU2001240645A1 AU2001240645A AU4064501A AU2001240645A1 AU 2001240645 A1 AU2001240645 A1 AU 2001240645A1 AU 2001240645 A AU2001240645 A AU 2001240645A AU 4064501 A AU4064501 A AU 4064501A AU 2001240645 A1 AU2001240645 A1 AU 2001240645A1
Authority
AU
Australia
Prior art keywords
path
paths
node
signal power
optical
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
AU2001240645A
Inventor
Ulf A. Persson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Publication of AU2001240645A1 publication Critical patent/AU2001240645A1/en
Abandoned legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/27—Arrangements for networking
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/27—Arrangements for networking
    • H04B10/275—Ring-type networks

Landscapes

  • Engineering & Computer Science (AREA)
  • Computing Systems (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Optical Communication System (AREA)
  • Small-Scale Networks (AREA)

Abstract

In an optical communication link a first node (30) with transmission means (50) and a second node with receiving means (40) are connected by at least two optical fibre transmission paths (100,200). One path serves as the working path, while the remaining path or paths serve as protection paths. The transmission means in the first node is connected to an optical signal power splitter (60) which couples the signal power from the transmitting means unequally into the different transmission paths. This uneven coupling of signal power imposes greater losses in one path than in the other or others. By arranging the splitter to couple a higher proportion of the transmitted optical power into the path that has the highest inherent losses the additional loss imposed on this path is reduced. Thus the maximum path loss between any two nodes can be minimised. This in turn means that the link length and also the size of the network is virtually unaffected by using the same transmitter. <IMAGE>
AU2001240645A 2000-04-05 2001-02-21 Optical communication system with two parallel transmission paths Abandoned AU2001240645A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP00107415 2000-04-05
EP00107415A EP1143646A1 (en) 2000-04-05 2000-04-05 Optical communication system with two parallel transmission paths
PCT/EP2001/001975 WO2001078268A1 (en) 2000-04-05 2001-02-21 Optical communication system with two parallel transmission paths

Publications (1)

Publication Number Publication Date
AU2001240645A1 true AU2001240645A1 (en) 2001-10-23

Family

ID=8168386

Family Applications (1)

Application Number Title Priority Date Filing Date
AU2001240645A Abandoned AU2001240645A1 (en) 2000-04-05 2001-02-21 Optical communication system with two parallel transmission paths

Country Status (6)

Country Link
US (1) US7450843B2 (en)
EP (2) EP1143646A1 (en)
AT (1) ATE270477T1 (en)
AU (1) AU2001240645A1 (en)
DE (1) DE60104100T2 (en)
WO (1) WO2001078268A1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030189897A1 (en) * 2002-04-09 2003-10-09 Lucent Technologies Inc. Dual line monitoring of 1‘protection with auto-switch
US7343096B1 (en) * 2003-06-18 2008-03-11 Ciena Corporation Method and apparatus for in-service upgrading of OADM to wavelength selective switch of higher degree
US7289728B2 (en) * 2004-03-11 2007-10-30 General Instrument Corporation Use of variable ratio couplers for network protection and recovery
JP4709764B2 (en) * 2004-09-17 2011-06-22 富士通株式会社 Optical add / drop device
IN2013MU01980A (en) * 2013-06-10 2015-05-29 Indian Inst Technology Bombay
US9960878B2 (en) * 2013-10-01 2018-05-01 Indian Institute Of Technology Bombay Scalable ultra dense hypergraph network for data centers

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3069411B2 (en) * 1991-09-04 2000-07-24 科学技術振興事業団 Waveguide type asymmetric directional optical coupler
US5253104A (en) * 1992-09-15 1993-10-12 At&T Bell Laboratories Balanced optical amplifier
US5396357A (en) * 1994-01-25 1995-03-07 Honeywell Inc. Fault tolerant optical cross-channel data link
US5901260A (en) * 1997-04-01 1999-05-04 Lockheed Martin Corporation Optical interface device
SE509807C2 (en) * 1997-05-15 1999-03-08 Ericsson Telefon Ab L M Device at add / drop node in a path length multiplexed optical communication system.
JPH11275028A (en) * 1998-03-20 1999-10-08 Fujitsu Ltd Optical communication system
SE520876C2 (en) * 1998-06-10 2003-09-09 Ericsson Telefon Ab L M ADD / Drpo node for an optical WDM network that has traffic only between neighboring nodes
US6359728B1 (en) * 1998-09-22 2002-03-19 Pirelli Cavi E Sistemi S.P.A. Pump device for pumping an active fiber of an optical amplifier and corresponding optical amplifier
USH2075H1 (en) * 1998-10-13 2003-08-05 At&T Corp. Restorable architectures for fiber-based broadband local access networks
US6947670B1 (en) * 1999-06-30 2005-09-20 Lucent Technologies Inc. Optical add/drop arrangement for ring networks employing wavelength division multiplexing
US6242484B1 (en) 1999-07-06 2001-06-05 Paraquest, Inc. Hypoestoxides, derivatives and agonists thereof for use of antiparasitic agents
US6760151B1 (en) * 2000-04-27 2004-07-06 Jds Uniphase Corporation Depolarized semiconductor laser sources

Also Published As

Publication number Publication date
EP1269664B1 (en) 2004-06-30
ATE270477T1 (en) 2004-07-15
WO2001078268A1 (en) 2001-10-18
US7450843B2 (en) 2008-11-11
DE60104100T2 (en) 2005-08-25
EP1143646A1 (en) 2001-10-10
EP1269664A1 (en) 2003-01-02
DE60104100D1 (en) 2004-08-05
US20030156845A1 (en) 2003-08-21

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