NO20003412L - Optisk system - Google Patents

Optisk system

Info

Publication number
NO20003412L
NO20003412L NO20003412A NO20003412A NO20003412L NO 20003412 L NO20003412 L NO 20003412L NO 20003412 A NO20003412 A NO 20003412A NO 20003412 A NO20003412 A NO 20003412A NO 20003412 L NO20003412 L NO 20003412L
Authority
NO
Norway
Prior art keywords
optical
filter
signals
amount
wavelength
Prior art date
Application number
NO20003412A
Other languages
English (en)
Other versions
NO20003412D0 (no
Inventor
Robert Charles Goodfellow
Original Assignee
Marconi Comm Ltd
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
Priority claimed from GBGB9915234.0A external-priority patent/GB9915234D0/en
Application filed by Marconi Comm Ltd filed Critical Marconi Comm Ltd
Publication of NO20003412D0 publication Critical patent/NO20003412D0/no
Publication of NO20003412L publication Critical patent/NO20003412L/no

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
    • H04B10/25—Arrangements specific to fibre transmission
    • H04B10/2507—Arrangements specific to fibre transmission for the reduction or elimination of distortion or dispersion
    • H04B10/25073—Arrangements specific to fibre transmission for the reduction or elimination of distortion or dispersion using spectral equalisation, e.g. spectral filtering
    • 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
    • H04J14/02216—Power control, e.g. to keep the total optical power constant by gain equalization

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Electromagnetism (AREA)
  • Optical Communication System (AREA)
  • Glass Compositions (AREA)
  • Gyroscopes (AREA)
  • Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)

Abstract

System for enkeltvis styring av effektnivået for flere optiske signaler (37) som er bølge- lengdedelt multiplekset (WDM-signaler) i en eneste optisk leder (36) som har optisk dempeutstyr som omfatter flere optiske dempeledd (35) som kan styres hver for seg. Et eksempel på et egnet optisk dempeledd er et avstembart Bragg-fibergitterfilter, hvis refleksjonskarakteristikk varierer med bølgelengden over et aktivt område av filteret. Ved å avstemme filteret er det mulig å styre reflektiviteten ved en bestemt bølgelengde i det aktive område. Systemet kan i 'tillegg omfatte en andre mengde optiske dempeledd (45) anordnet for å kompensere for mulig effektnivå-forvrengning innført av den første mengde. Optiske sirkulatorer (30, 40) kan benyttes for å rute signaler inn i og mellom mengdene av optiske dempeledd.
NO20003412A 1999-06-30 2000-06-29 Optisk system NO20003412L (no)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB9915234.0A GB9915234D0 (en) 1999-06-30 1999-06-30 Optical system
GB9918723A GB2351625B (en) 1999-06-30 1999-08-10 Optical system

Publications (2)

Publication Number Publication Date
NO20003412D0 NO20003412D0 (no) 2000-06-29
NO20003412L true NO20003412L (no) 2001-01-02

Family

ID=26315714

Family Applications (1)

Application Number Title Priority Date Filing Date
NO20003412A NO20003412L (no) 1999-06-30 2000-06-29 Optisk system

Country Status (8)

Country Link
US (1) US6363202B1 (no)
EP (1) EP1065821B1 (no)
JP (1) JP2001188209A (no)
CN (1) CN1192264C (no)
AT (1) ATE347199T1 (no)
DE (1) DE60032063T2 (no)
GB (1) GB2363014B (no)
NO (1) NO20003412L (no)

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US6763043B2 (en) 1998-12-04 2004-07-13 Cidra Corporation Tunable grating-based dispersion compensator
US6792009B2 (en) 1998-12-04 2004-09-14 Cidra Corporation Tunable grating-based channel filter parking device
GB9915233D0 (en) * 1999-06-30 1999-09-01 Marconi Comm Ltd Optical system
US6483981B1 (en) 2000-06-28 2002-11-19 Molecular Optoelectronics Corp. Single-channel attenuators
US6701089B1 (en) * 2000-06-30 2004-03-02 Nortel Networks Limited Over-equalization for multi-span wavelength division multiplexed fiber optic communication systems
US6489399B1 (en) 2000-07-31 2002-12-03 Molecular Optoelectronics Corp. Dye-appended polymers for broadband fiber optic devices
US7386204B1 (en) 2000-08-26 2008-06-10 Cidra Corporation Optical filter having a shaped filter function
US6594410B2 (en) 2000-08-26 2003-07-15 Cidra Corporation Wide range tunable optical filter
US6487336B1 (en) * 2000-10-11 2002-11-26 General Photonics Corporation WDM channel equalization and control
US6681073B2 (en) 2001-03-19 2004-01-20 Molecular Optoelectronics Corporation Fiber optic power control systems and methods
US6611649B2 (en) 2001-03-19 2003-08-26 Molecular Optoelectronics Corporation Variable optical attenuator with polarization maintaining fiber
CA2349028A1 (en) * 2001-05-28 2002-11-28 Optenia, Inc. Integrated double pass demultiplexer/variable optical attenuator for channel equalization
US7088877B2 (en) * 2001-06-13 2006-08-08 Intel Corporation Method and apparatus for tuning a bragg grating in a semiconductor substrate
US6853671B2 (en) 2001-06-13 2005-02-08 Intel Corporation Method and apparatus for tuning a laser with a Bragg grating in a semiconductor substrate
US6856732B2 (en) 2001-06-13 2005-02-15 Intel Corporation Method and apparatus for adding/droping optical signals in a semiconductor substrate
US20030053750A1 (en) * 2001-09-20 2003-03-20 Yang William (Wei) Dynamic channel power equalizer based on VPG elements
JP2003114402A (ja) * 2001-10-02 2003-04-18 Sumitomo Electric Ind Ltd 光合分波器およびその調整方法
US6862395B2 (en) * 2001-11-16 2005-03-01 Nortel Networks Limited Attenuation devices
GB0200177D0 (en) 2002-01-04 2002-02-20 Marconi Comm Ltd Noise reduction in optical communications networks
US6950577B2 (en) * 2002-07-01 2005-09-27 Intel Corporation Waveguide-based Bragg gratings with spectral sidelobe suppression and method thereof
US7245792B2 (en) * 2002-08-16 2007-07-17 Intel Corporation Silicon-based tunable single passband optical filter
US6922502B2 (en) 2003-03-25 2005-07-26 Lucent Technologies Inc. Optical filtering method and apparatus
US6930817B2 (en) * 2003-04-25 2005-08-16 Palo Alto Research Center Incorporated Configurable grating based on surface relief pattern for use as a variable optical attenuator
CN1332240C (zh) * 2004-04-13 2007-08-15 华为技术有限公司 光衰减系统
US7054054B1 (en) 2004-12-20 2006-05-30 Palo Alto Research Center Incorporated Optical modulator with a traveling surface relief pattern
EP1788730B1 (en) * 2005-11-21 2009-07-01 Alcatel Lucent Optical amplification unit with span loss tilt compensation
US8768121B2 (en) * 2009-03-10 2014-07-01 Her Majesty The Queen In Right Of Canada, As Represented By The Minister Of Industry, Through The Communications Research Centre Canada Photonic filtering of electrical signals
TWI588322B (zh) * 2016-09-22 2017-06-21 Pier scour depth sensor

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US5093876A (en) * 1990-07-27 1992-03-03 At&T Bell Laboratories WDM systems incorporating adiabatic reflection filters
US5425116A (en) * 1993-11-16 1995-06-13 At&T Corp. Tunable optical waveguide grating arrangement
JPH07336327A (ja) * 1994-06-07 1995-12-22 Nippon Telegr & Teleph Corp <Ntt> 透過型光フィルタおよび波長多重分離フィルタならびにリングレーザ
GB9420132D0 (en) * 1994-10-05 1994-11-16 Norhern Telecom Limited Optical amplifiers
FR2738698B1 (fr) * 1995-09-08 1997-10-17 Alcatel Nv Procede et systeme d'egalisation des niveaux respectifs de puissance des canaux d'un signal optique spectralement multiplexe
JPH0993200A (ja) * 1995-09-27 1997-04-04 Nec Corp 光増幅中継伝送装置
JP3039347B2 (ja) * 1995-12-27 2000-05-08 日立電線株式会社 スイッチング機能を備えた光部品及びそれに使用する導波路型フィルタ
US5608825A (en) * 1996-02-01 1997-03-04 Jds Fitel Inc. Multi-wavelength filtering device using optical fiber Bragg grating
JP3720112B2 (ja) * 1996-03-18 2005-11-24 富士通株式会社 波長分割多重が適用されるシステム及び光パワー制御装置
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US5841918A (en) * 1996-08-26 1998-11-24 Jds Fitel Inc. Wavelength and bandwidth tunable optical system
JPH10173597A (ja) * 1996-12-06 1998-06-26 Nec Corp 光イコライザ
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AU8175098A (en) * 1997-06-30 1999-01-19 Uniphase Telecommunications Products, Inc. Method and apparatus for dynamically equalizing gain in an optical network
CN1294692A (zh) * 1998-03-25 2001-05-09 康宁股份有限公司 具有分置增益放大器和信号改进装置的光学传输系统
US6057959A (en) * 1998-05-22 2000-05-02 Ciena Corporation Optical amplifier having substantially uniform spectral gain

Also Published As

Publication number Publication date
EP1065821A4 (en) 2001-12-18
GB2363014B (en) 2002-02-13
ATE347199T1 (de) 2006-12-15
CN1281992A (zh) 2001-01-31
DE60032063T2 (de) 2007-06-21
US6363202B1 (en) 2002-03-26
DE60032063D1 (de) 2007-01-11
GB0120106D0 (en) 2001-10-10
EP1065821A2 (en) 2001-01-03
NO20003412D0 (no) 2000-06-29
EP1065821B1 (en) 2006-11-29
JP2001188209A (ja) 2001-07-10
CN1192264C (zh) 2005-03-09
GB2363014A (en) 2001-12-05
EP1065821A3 (en) 2002-01-30

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