WO2007044939A3 - Optical ring networks using circulating optical probe in protection switching with automatic reversion - Google Patents

Optical ring networks using circulating optical probe in protection switching with automatic reversion Download PDF

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Publication number
WO2007044939A3
WO2007044939A3 PCT/US2006/040277 US2006040277W WO2007044939A3 WO 2007044939 A3 WO2007044939 A3 WO 2007044939A3 US 2006040277 W US2006040277 W US 2006040277W WO 2007044939 A3 WO2007044939 A3 WO 2007044939A3
Authority
WO
WIPO (PCT)
Prior art keywords
optical
protection switching
circulating
ring networks
optical probe
Prior art date
Application number
PCT/US2006/040277
Other languages
French (fr)
Other versions
WO2007044939A2 (en
Inventor
Winston I Way
Original Assignee
Opvista Inc
Winston I Way
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 Opvista Inc, Winston I Way filed Critical Opvista Inc
Priority to EP06836322.5A priority Critical patent/EP1949119A4/en
Publication of WO2007044939A2 publication Critical patent/WO2007044939A2/en
Publication of WO2007044939A3 publication Critical patent/WO2007044939A3/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0221—Power control, e.g. to keep the total optical power constant
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
    • H04J14/0228—Wavelength allocation for communications one-to-all, e.g. broadcasting wavelengths
    • H04J14/023—Wavelength allocation for communications one-to-all, e.g. broadcasting wavelengths in WDM passive optical networks [WDM-PON]
    • H04J14/0232—Wavelength allocation for communications one-to-all, e.g. broadcasting wavelengths in WDM passive optical networks [WDM-PON] for downstream transmission
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
    • H04J14/0228—Wavelength allocation for communications one-to-all, e.g. broadcasting wavelengths
    • H04J14/023—Wavelength allocation for communications one-to-all, e.g. broadcasting wavelengths in WDM passive optical networks [WDM-PON]
    • H04J14/0235—Wavelength allocation for communications one-to-all, e.g. broadcasting wavelengths in WDM passive optical networks [WDM-PON] for upstream transmission
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0278—WDM optical network architectures
    • H04J14/0283—WDM ring architectures
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0287—Protection in WDM systems
    • H04J14/0293—Optical channel protection
    • H04J14/0295—Shared protection at the optical channel (1:1, n:m)
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/14—Monitoring arrangements

Abstract

Techniques and apparatus for optical communication networks including fiber ring networks with protection switching to maintain optical communications when an optical failure occurs and to automatically revert to normal operation when the optical failure is corrected. Implementations include use of a circulating optical probe signal at an optical probe wavelength within the gain spectral range of optical amplifiers used in a fiber ring network to detect an optical failure.
PCT/US2006/040277 2005-10-13 2006-10-13 Optical ring networks using circulating optical probe in protection switching with automatic reversion WO2007044939A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP06836322.5A EP1949119A4 (en) 2005-10-13 2006-10-13 Optical ring networks using circulating optical probe in protection switching with automatic reversion

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US72699105P 2005-10-13 2005-10-13
US60/726,991 2005-10-13

Publications (2)

Publication Number Publication Date
WO2007044939A2 WO2007044939A2 (en) 2007-04-19
WO2007044939A3 true WO2007044939A3 (en) 2007-12-06

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2006/040277 WO2007044939A2 (en) 2005-10-13 2006-10-13 Optical ring networks using circulating optical probe in protection switching with automatic reversion

Country Status (3)

Country Link
US (1) US8139476B2 (en)
EP (1) EP1949119A4 (en)
WO (1) WO2007044939A2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9485050B2 (en) 2009-12-08 2016-11-01 Treq Labs, Inc. Subchannel photonic routing, switching and protection with simplified upgrades of WDM optical networks

Families Citing this family (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7120359B2 (en) * 2000-05-22 2006-10-10 Opvista Incorporated Broadcast and select all optical network
US7499647B2 (en) * 2000-05-22 2009-03-03 Opvista Incorporated Fully protected broadcast and select all optical network
WO2006002080A2 (en) * 2004-06-15 2006-01-05 Opvista Incorporated Optical communication using duobinary modulation
WO2006119375A2 (en) * 2005-05-02 2006-11-09 Opvista, Incorporated Multiple interconnected broadcast and select optical ring networks with revertible protection switch
JP4376263B2 (en) * 2006-12-08 2009-12-02 富士通株式会社 Optical wavelength multiplexing system
US7974533B2 (en) * 2006-12-14 2011-07-05 Verizon Patent And Licensing Inc. Long reach optical network
US7765385B2 (en) * 2007-04-18 2010-07-27 International Business Machines Corporation Fault recovery on a parallel computer system with a torus network
US7773883B1 (en) 2007-05-04 2010-08-10 Vello Systems, Inc. Single-fiber optical ring networks based on optical double sideband modulation
WO2009012409A2 (en) * 2007-07-17 2009-01-22 Opvista Incorporated Optical ring networks having node-to-node optical communication channels for carrying data traffic
US8064486B2 (en) * 2007-09-07 2011-11-22 Infinera Corporation Determination of channel latency within a round-trip path
US8457491B2 (en) * 2007-11-06 2013-06-04 Telefonaktiebolaget Lm Ericsson (Publ) Allocation of transmission power in an optical communication system
JP4973491B2 (en) * 2007-12-26 2012-07-11 富士通株式会社 Optical transmission apparatus and optical communication system
US7801024B2 (en) * 2008-02-12 2010-09-21 At&T Intellectual Property Ii, L.P. Restoring aggregated circuits with circuit integrity checks in a hierarchical network
WO2011044948A1 (en) * 2009-10-16 2011-04-21 Nokia Siemens Networks Oy Optical network and method for processing data in an optical network
US8705741B2 (en) * 2010-02-22 2014-04-22 Vello Systems, Inc. Subchannel security at the optical layer
US8542999B2 (en) 2011-02-01 2013-09-24 Vello Systems, Inc. Minimizing bandwidth narrowing penalties in a wavelength selective switch optical network
US9185027B2 (en) 2011-07-29 2015-11-10 Telefonaktiebolaget L M Ericsson (Publ) Method and apparatus for resilient routing of control traffic in a split-architecture system
US8804490B2 (en) * 2011-07-29 2014-08-12 Telefonaktiebolaget L M Ericsson (Publ) Controller placement for fast failover in the split architecture
US8811212B2 (en) 2012-02-22 2014-08-19 Telefonaktiebolaget L M Ericsson (Publ) Controller placement for fast failover in the split architecture
JP5994508B2 (en) * 2012-09-18 2016-09-21 富士通株式会社 Transmission device, communication system, and transmission level control method
US9819436B2 (en) 2013-08-26 2017-11-14 Coriant Operations, Inc. Intranodal ROADM fiber management apparatuses, systems, and methods
EP2852081B1 (en) * 2013-09-24 2019-12-11 Alcatel Lucent Optical ring network
US9281893B2 (en) 2013-10-23 2016-03-08 Lumentum Operations Llc In-service monitoring of a fiberoptic network
US9723385B2 (en) * 2013-11-06 2017-08-01 Coriant Operations, LLC Procedures, apparatuses, systems, and computer programs for providing optical network channel protection
JP6258683B2 (en) * 2013-12-03 2018-01-10 株式会社日立製作所 Optical transmission system
KR101631651B1 (en) * 2013-12-04 2016-06-20 주식회사 쏠리드 Optical Repeater of Ring Topology type
WO2015120895A1 (en) * 2014-02-13 2015-08-20 Telefonaktiebolaget L M Ericsson (Publ) Method and apparatus for detecting whether an optical fibre inside an optical node is disconnected or damaged and a path computation device
JP6485226B2 (en) * 2015-05-29 2019-03-20 富士通株式会社 Transmission apparatus and setting method
CN107925476B (en) * 2015-07-23 2020-11-10 日本电气株式会社 Route switching device, route switching system, and route switching method
CN109088777B (en) * 2018-09-14 2021-12-31 武汉光迅科技股份有限公司 Device and method for matching optical fiber connection of ROADM service side
WO2020088784A1 (en) * 2018-11-02 2020-05-07 Telefonaktiebolaget Lm Ericsson (Publ) Optical protection switching for single fibre bidirectional wdm optical ring
WO2021249639A1 (en) 2020-06-10 2021-12-16 Telefonaktiebolaget Lm Ericsson (Publ) Fault location in an optical ring network
US11251864B1 (en) * 2020-07-01 2022-02-15 Amazon Technologies, Inc. Logical cut of an optical fiber due to fiber events
WO2023081916A1 (en) * 2021-11-08 2023-05-11 Commscope Technologies Llc Coexistence module for accomodating optical time domain reflectometry in optical networks

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050158047A1 (en) * 2003-07-16 2005-07-21 Way Winston I. Optical ring networks with failure protection mechanisms

Family Cites Families (110)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5062684A (en) 1990-01-17 1991-11-05 At&T Bell Laboratories Optical fiber filter
US5539559A (en) * 1990-12-18 1996-07-23 Bell Communications Research Inc. Apparatus and method for photonic contention resolution in a large ATM switch
US5239401A (en) * 1990-12-31 1993-08-24 Gte Laboratories Incorporated Optical modulator for cancellation of second-order intermodulation products in lightwave systems
US5301058A (en) * 1990-12-31 1994-04-05 Gte Laboratories Incorporated Single sideband optical modulator for lightwave systems
US5101450A (en) * 1991-01-23 1992-03-31 Gte Laboratories Incorporated Quadrature optical phase modulators for lightwave systems
US5333000A (en) * 1992-04-03 1994-07-26 The United States Of America As Represented By The United States Department Of Energy Coherent optical monolithic phased-array antenna steering system
US5442623A (en) * 1992-08-17 1995-08-15 Bell Communications Research, Inc. Passive protected self healing ring network
US5390188A (en) * 1993-08-02 1995-02-14 Synoptics Method and apparatus for measuring and monitoring the performance within a ring communication network
IT1265018B1 (en) 1993-08-10 1996-10-17 Cselt Centro Studi Lab Telecom DEVICE FOR EXTRACTION AND REINSERTION OF AN OPTICAL CARRIER IN OPTICAL COMMUNICATION NETWORKS.
JP3396270B2 (en) 1993-08-10 2003-04-14 富士通株式会社 Optical dispersion compensation method
US5509093A (en) * 1993-10-13 1996-04-16 Micron Optics, Inc. Temperature compensated fiber fabry-perot filters
GB9401488D0 (en) * 1994-01-26 1994-03-23 British Telecomm Optical communications
US5764821A (en) * 1994-02-06 1998-06-09 Lucent Technologies Inc. Large capacity local access network
JP3434869B2 (en) 1994-02-07 2003-08-11 株式会社日立製作所 Optical regenerative repeater and optical transmission device
DE69530803D1 (en) * 1994-02-17 2003-06-26 Toshiba Kawasaki Kk Optical wavelength division multiplex network
CA2139957C (en) * 1994-02-18 1999-02-09 Andrew R. Chraplyvy Multi-channel optical fiber communication system
IT1272846B (en) * 1994-11-25 1997-06-30 Pirelli Cavi Spa "WAVELENGTH MULTIPLATION TELECOMMUNICATION SYSTEM AND METHOD, WITH CONTROLLED SEPARATION OF THE OUTPUT CHANNELS AND FOR THE DETERMINATION OF THE SIGNAL / OPTICAL NOISE RATIO"
EP0717482A1 (en) * 1994-12-14 1996-06-19 AT&T Corp. Semiconductor interferometric optical wavelength conversion device
JP3376144B2 (en) * 1994-12-28 2003-02-10 日本電気株式会社 Optical network device and optical transmission system
US5680235A (en) * 1995-04-13 1997-10-21 Telefonaktiebolaget Lm Ericsson Optical multichannel system
DE19514386A1 (en) 1995-04-19 1996-10-24 Hertz Inst Heinrich Optical frequency generator
US5784184A (en) * 1995-05-11 1998-07-21 Ciena Corporation WDM Optical communication systems with remodulators and remodulating channel selectors
JPH11508427A (en) * 1995-06-26 1999-07-21 テレフオンアクチーボラゲツト エル エム エリクソン（パブル） Self-healing net
FR2736777B1 (en) * 1995-07-12 1997-08-08 Alcatel Nv OPTICAL TRANSMISSION NETWORK WITH WAVELENGTH MULTIPLEXING
US5596436A (en) * 1995-07-14 1997-01-21 The Regents Of The University Of California Subcarrier multiplexing with dispersion reduction and direct detection
GB9516017D0 (en) * 1995-08-04 1995-10-04 Stc Submarine Systems Ltd Optical level control in wavelength add-drop multiplexing branching units
DE19529376A1 (en) * 1995-08-10 1997-02-13 Sel Alcatel Ag Optical TDMA ring network with a central transmitting and receiving device
US5625478A (en) * 1995-09-14 1997-04-29 Lucent Technologies Inc. Optically restorable WDM ring network using simple add/drop circuitry
JP3356365B2 (en) 1995-09-19 2002-12-16 ケイディーディーアイ株式会社 Optical ADM device
US5617233A (en) * 1995-09-28 1997-04-01 The United States Of America As Represented By The Secretary Of The Air Force Transparent optical node structure
US5608825A (en) * 1996-02-01 1997-03-04 Jds Fitel Inc. Multi-wavelength filtering device using optical fiber Bragg grating
KR100342431B1 (en) * 2000-09-07 2002-07-03 윤덕용 A multi-wavelength locking method and locker for WDM system
US5982518A (en) 1996-03-27 1999-11-09 Ciena Corporation Optical add-drop multiplexers compatible with very dense WDM optical communication systems
US5742416A (en) * 1996-03-28 1998-04-21 Ciena Corp. Bidirectional WDM optical communication systems with bidirectional optical amplifiers
JPH09270770A (en) * 1996-04-02 1997-10-14 Kokusai Denshin Denwa Co Ltd <Kdd> Light adding and dropping device
DE19628131C2 (en) * 1996-07-12 2003-07-17 Semikron Elektronik Gmbh Gate voltage limitation for a circuit arrangement
US5781327A (en) * 1996-08-19 1998-07-14 Trw Inc. Optically efficient high dynamic range electro-optic modulator
US5953141A (en) * 1996-10-03 1999-09-14 International Business Machines Corporation Dynamic optical add-drop multiplexers and wavelength-routing networks with improved survivability and minimized spectral filtering
JPH10112700A (en) * 1996-10-04 1998-04-28 Nec Corp Wavelength division multiplex transmitter of ring configuration
CA2188358A1 (en) * 1996-10-21 1998-04-21 Michael J. Sieben optical modulation system
US6201909B1 (en) * 1996-10-25 2001-03-13 Arroyo Optics, Inc. Wavelength selective optical routers
US5734493A (en) * 1996-11-01 1998-03-31 Lucent Technologies Inc. Optical frequency conversion device
US5745273A (en) * 1996-11-27 1998-04-28 Lucent Technologies Inc. Device for single sideband modulation of an optical signal
US5778118A (en) * 1996-12-03 1998-07-07 Ciena Corporation Optical add-drop multiplexers for WDM optical communication systems
JP3068018B2 (en) * 1996-12-04 2000-07-24 日本電気株式会社 Optical wavelength division multiplex ring system
JP3618943B2 (en) * 1996-12-17 2005-02-09 キヤノン株式会社 Ink jet recording head and ink jet recording apparatus
US5949560A (en) * 1997-02-05 1999-09-07 Northern Telecom Limited Optical transmission system
US5917638A (en) * 1997-02-13 1999-06-29 Lucent Technologies, Inc. Duo-binary signal encoding
US5938309A (en) * 1997-03-18 1999-08-17 Ciena Corporation Bit-rate transparent WDM optical communication system with remodulators
US6035080A (en) * 1997-06-20 2000-03-07 Henry; Charles Howard Reconfigurable add-drop multiplexer for optical communications systems
US6191854B1 (en) * 1997-06-23 2001-02-20 Pirelli Cavi E Sistemi S.P.A. Optical telecommunications system
DE19730830A1 (en) 1997-07-18 1999-01-21 Alsthom Cge Alcatel Laser for generating a wave crest
DE19731494C2 (en) * 1997-07-22 1999-05-27 Siemens Ag Method and arrangement for data transmission using wavelength division multiplexing in an optical ring network
US6222654B1 (en) * 1997-08-04 2001-04-24 Lucent Technologies, Inc. Optical node system for a ring architecture and method thereof
US6631018B1 (en) * 1997-08-27 2003-10-07 Nortel Networks Limited WDM optical network with passive pass-through at each node
JP3930952B2 (en) * 1997-10-20 2007-06-13 富士通株式会社 Optical cross-connect device, optical add / drop device, and light source device
CA2254606C (en) 1997-11-28 2003-06-17 Nec Corporation Ring network for sharing protection resource by working communication paths
US5982963A (en) 1997-12-15 1999-11-09 University Of Southern California Tunable nonlinearly chirped grating
US5870212A (en) * 1998-01-14 1999-02-09 Mciworldcom, Inc. Self-healing optical network
US6195351B1 (en) * 1998-01-28 2001-02-27 3Com Corporation Logical switch set
JP3909946B2 (en) * 1998-01-30 2007-04-25 富士通株式会社 Bidirectional wavelength switch and optical multiplexer / demultiplexer
JP3639109B2 (en) * 1998-04-02 2005-04-20 富士通株式会社 Optical transmission device, optical transmission system, and optical terminal
US6259836B1 (en) * 1998-05-14 2001-07-10 Telecommunications Research Laboratories Optical frequency shifter and transmission 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
SE520943C2 (en) * 1998-06-10 2003-09-16 Ericsson Telefon Ab L M Add / drop node arranged to be connected in a wdm-type fiber optic network
DE19828614A1 (en) 1998-06-26 1999-12-30 Ams Optotech Vertrieb Gmbh Transmission method for optical data using optical waveguide
US6580537B1 (en) * 1998-07-17 2003-06-17 Regents Of The University Of California, The High-throughput, low-latency next generation internet networks using optical label switching and high-speed optical header generation, detection and reinsertion
US20020063928A1 (en) * 1998-08-31 2002-05-30 Per Bang Hansen Filtering of data-encoded optical signals
US6115154A (en) * 1998-09-18 2000-09-05 Telcordia Technologies, Inc. Method and system for detecting loss of signal in wavelength division multiplexed systems
US6292598B1 (en) * 1998-11-04 2001-09-18 Corvis Corporation Optical transmission apparatuses, methods, and systems
US6118566A (en) * 1998-11-04 2000-09-12 Corvis Corporation Optical upconverter apparatuses, methods, and systems
US6404535B1 (en) * 1998-11-30 2002-06-11 Trw Inc. Optically implemented wideband complex correlator using a multi-mode imaging device
US6130766A (en) 1999-01-07 2000-10-10 Qtera Corporation Polarization mode dispersion compensation via an automatic tracking of a principal state of polarization
US6271946B1 (en) * 1999-01-25 2001-08-07 Telcordia Technologies, Inc. Optical layer survivability and security system using optical label switching and high-speed optical header generation and detection
US6466342B1 (en) 1999-02-18 2002-10-15 At&T Corp. Optical transmission system and method using an optical carrier drop/add transceiver
FI108488B (en) * 1999-03-12 2002-01-31 Nokia Corp Dispersion compensation in an optical communication network and an optical communication network
JP2000323786A (en) * 1999-05-14 2000-11-24 Fujitsu Ltd Method, device, and system for shaping waveform of signal light
US6192173B1 (en) * 1999-06-02 2001-02-20 Nortel Networks Limited Flexible WDM network architecture
US6433904B1 (en) * 1999-07-27 2002-08-13 Sycamore Networks, Inc. Method and apparatus for improving transmission performance over wavelength division multiplexed optical communication links using forward error correction coding
US6369923B1 (en) * 1999-09-07 2002-04-09 Cinta Corporation Multiwavelength stabilization with a single reference comb filter in DWDM systems
US6539144B1 (en) * 1999-10-04 2003-03-25 At&T Corp. Method and system for restoring optical ring-networks
US6385204B1 (en) * 1999-11-22 2002-05-07 Worldcom, Inc. Network architecture and call processing system
US6661976B1 (en) 2000-01-05 2003-12-09 At&T Corp. Method and system for single-sideband optical signal generation and transmission
EP1132844A3 (en) * 2000-03-02 2002-06-05 Telseon IP Services Inc. E-commerce system facilitating service networks including broadband communication service networks
AU2001252889A1 (en) * 2000-03-07 2001-09-17 Corning Inc. A protection switch in a single two-fiber optical channel shared protection ring
US6525857B1 (en) * 2000-03-07 2003-02-25 Opvista, Inc. Method and apparatus for interleaved optical single sideband modulation
GB2362525B (en) * 2000-05-18 2002-07-24 Marconi Comm Ltd Radiation power equalization in wavelength division multiplexing (WDM) optical communication system
US20020114034A1 (en) * 2000-05-22 2002-08-22 Winston Way Split wave method and apparatus for transmitting data in long-haul optical fiber systems
US7499647B2 (en) * 2000-05-22 2009-03-03 Opvista Incorporated Fully protected broadcast and select all optical network
US6895184B2 (en) 2000-05-22 2005-05-17 Opvista, Inc. Interconnected broadcast and select optical networks with shared wavelengths
US7120359B2 (en) 2000-05-22 2006-10-10 Opvista Incorporated Broadcast and select all optical network
US6560252B1 (en) * 2000-07-20 2003-05-06 Jds Uniphase Inc. Method and device for wavelength locking
US6788899B2 (en) * 2000-09-11 2004-09-07 Winston I. Way Dynamic wavelength add/drop multiplexer for UDWDM optical communication system
US7024112B2 (en) * 2000-09-11 2006-04-04 Opvista Incorporated In-band wavelength conversion wavelength buffering and multi-protocol lambda switching
US6829215B2 (en) * 2000-10-31 2004-12-07 Marconi Intellectual Property (Ringfence) Inc. IP multi-homing
US7046619B2 (en) * 2000-11-07 2006-05-16 Ciena Corporation Method and system for bi-directional path switched network
US6339663B1 (en) * 2000-12-22 2002-01-15 Seneca Networks, Inc. Bidirectional WDM optical communication system with bidirectional optical service channels
JP4646048B2 (en) 2001-03-02 2011-03-09 日本電気株式会社 Single sideband signal light generation method and single sideband signal light generation circuit
JP2002271354A (en) * 2001-03-06 2002-09-20 Fujitsu Ltd Light path switching apparatus and light wavelength multiplex diversity communication system
US6556744B1 (en) * 2001-10-12 2003-04-29 Nortel Networks Limited Reduction of dispersion effects in optical transmission fibre systems
US6717922B2 (en) * 2002-03-04 2004-04-06 Foundry Networks, Inc. Network configuration protocol and method for rapid traffic recovery and loop avoidance in ring topologies
US20030185248A1 (en) * 2002-03-27 2003-10-02 Adc Telecommunications Israel Ltd. Simplified bandwidth handling for SDH/SONET access rings
US7116905B2 (en) * 2002-03-27 2006-10-03 Fujitsu Limited Method and system for control signaling in an open ring optical network
US7483636B2 (en) * 2003-07-28 2009-01-27 Fujitsu Limited Optical network with sub-band rejection and bypass
KR100557142B1 (en) * 2003-10-14 2006-03-03 삼성전자주식회사 Rz-ami optical receiver module
US7643761B2 (en) * 2004-02-19 2010-01-05 Alcatel-Lucent Usa Inc. Method and apparatus for processing optical duobinary signals
US20050201762A1 (en) * 2004-03-12 2005-09-15 Moeller Lothar Benedict E.J. Optical RZ-duobinary transmission system with narrow bandwidth optical filter
JP4414800B2 (en) * 2004-03-25 2010-02-10 株式会社日立コミュニケーションテクノロジー Optical transmission apparatus and control method thereof
WO2006002080A2 (en) 2004-06-15 2006-01-05 Opvista Incorporated Optical communication using duobinary modulation
WO2006119375A2 (en) 2005-05-02 2006-11-09 Opvista, Incorporated Multiple interconnected broadcast and select optical ring networks with revertible protection switch

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050158047A1 (en) * 2003-07-16 2005-07-21 Way Winston I. Optical ring networks with failure protection mechanisms

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9485050B2 (en) 2009-12-08 2016-11-01 Treq Labs, Inc. Subchannel photonic routing, switching and protection with simplified upgrades of WDM optical networks

Also Published As

Publication number Publication date
EP1949119A2 (en) 2008-07-30
EP1949119A4 (en) 2017-01-18
US8139476B2 (en) 2012-03-20
WO2007044939A2 (en) 2007-04-19
US20070086332A1 (en) 2007-04-19

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