AU2001242576A1 - Method and apparatus for generating a pulse width modulated signal and optical attenuator controlled by a pulse width modulated signal - Google Patents

Method and apparatus for generating a pulse width modulated signal and optical attenuator controlled by a pulse width modulated signal

Info

Publication number
AU2001242576A1
AU2001242576A1 AU2001242576A AU4257601A AU2001242576A1 AU 2001242576 A1 AU2001242576 A1 AU 2001242576A1 AU 2001242576 A AU2001242576 A AU 2001242576A AU 4257601 A AU4257601 A AU 4257601A AU 2001242576 A1 AU2001242576 A1 AU 2001242576A1
Authority
AU
Australia
Prior art keywords
pulse width
modulated signal
width modulated
generating
optical attenuator
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
AU2001242576A
Inventor
Roger Warwick Brown
Graham Butler
Earl Anthony Dennis
Michael John Leach
Darren William Vass
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.)
Marconi Communications Ltd
Original Assignee
Marconi Communications Ltd
Marconi Co 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 GB0006938A external-priority patent/GB2360601B/en
Priority claimed from GB0027390A external-priority patent/GB2368986B/en
Application filed by Marconi Communications Ltd, Marconi Co Ltd filed Critical Marconi Communications Ltd
Publication of AU2001242576A1 publication Critical patent/AU2001242576A1/en
Abandoned legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/0121—Operation of devices; Circuit arrangements, not otherwise provided for in this subclass
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/0147—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on thermo-optic effects
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F2203/00—Function characteristic
    • G02F2203/48—Variable attenuator
AU2001242576A 2000-03-23 2001-03-23 Method and apparatus for generating a pulse width modulated signal and optical attenuator controlled by a pulse width modulated signal Abandoned AU2001242576A1 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
GB0006938 2000-03-23
GB0006938A GB2360601B (en) 2000-03-23 2000-03-23 Enhanced resolution attenuator
GB0027390A GB2368986B (en) 2000-11-09 2000-11-09 Pulse width modulation method
GB0027390 2000-11-09
PCT/GB2001/001309 WO2001071914A1 (en) 2000-03-23 2001-03-23 Method and apparatus for generating a pulse width modulated signal and optical attenuator controlled by a pulse width modulated signal

Publications (1)

Publication Number Publication Date
AU2001242576A1 true AU2001242576A1 (en) 2001-10-03

Family

ID=26243935

Family Applications (1)

Application Number Title Priority Date Filing Date
AU2001242576A Abandoned AU2001242576A1 (en) 2000-03-23 2001-03-23 Method and apparatus for generating a pulse width modulated signal and optical attenuator controlled by a pulse width modulated signal

Country Status (7)

Country Link
US (2) US6747778B2 (en)
EP (2) EP1269628B1 (en)
JP (1) JP2003528524A (en)
CN (1) CN100417020C (en)
AU (1) AU2001242576A1 (en)
DE (1) DE60135734D1 (en)
WO (1) WO2001071914A1 (en)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2001242576A1 (en) * 2000-03-23 2001-10-03 Marconi Communications Limited Method and apparatus for generating a pulse width modulated signal and optical attenuator controlled by a pulse width modulated signal
GB0130214D0 (en) * 2001-12-18 2002-02-06 Cit Alcatel Supervisory signalling for optical communications equipment
JP4593073B2 (en) * 2002-12-26 2010-12-08 株式会社半導体エネルギー研究所 Laser irradiation device
CN1310427C (en) * 2004-02-25 2007-04-11 凌阳科技股份有限公司 Pulse-width modulation circuit and method
US7433606B2 (en) * 2004-06-28 2008-10-07 Jds Uniphase Corporation Photodiode bias controller for optical receiver
US7459951B2 (en) * 2006-02-22 2008-12-02 Exar Corporation Self-calibrating digital pulse-width modulator (DPWM)
US7230837B1 (en) * 2006-03-27 2007-06-12 North Carolina State University Method and circuit for cascaded pulse width modulation
JP4840328B2 (en) * 2007-10-25 2011-12-21 住友電装株式会社 PWM control method and apparatus, and dimmer
CN103620321B (en) * 2011-06-07 2016-08-17 B/E航空公司 Thermoelectric cooling system for Food & Drink room
CN102913428A (en) * 2011-08-01 2013-02-06 鸿富锦精密工业（深圳）有限公司 Fan module testing system
CN103036540B (en) * 2011-09-30 2015-05-20 北大方正集团有限公司 Pulse width modulation (PWM) method and device for power control
CN103630756B (en) * 2013-12-09 2016-08-17 北京无线电计量测试研究所 A kind of calibration steps of high-power microwave pulse signal
JP2016192882A (en) * 2015-03-31 2016-11-10 株式会社ジェイテクト Motor control device
WO2019033306A1 (en) * 2017-08-16 2019-02-21 西门子公司 Method and apparatus for dynamic adjustment of pulse width modulation signals
CN114584223B (en) * 2022-03-15 2023-07-21 中山大学 Pulse width modulation system and method for Mach-Zehnder interferometer

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Publication number Priority date Publication date Assignee Title
US4019159A (en) * 1975-10-14 1977-04-19 Hughes Aircraft Company Optical frequency doubler using electro-optic crystal with improved feedback control of crystal phase match
JPS5977721A (en) * 1982-10-26 1984-05-04 Matsushita Electric Ind Co Ltd Pulse width modulator
GB2144005B (en) * 1983-07-28 1986-10-22 Rca Corp Digital-to-analog converter useful in a television receiver
JPS61251320A (en) * 1985-04-30 1986-11-08 Meidensha Electric Mfg Co Ltd Pulse width modulation circuit
EP0328020B1 (en) 1988-02-12 1996-10-09 The Dow Chemical Company Use of a catalyst in epoxy compositions
US5191374A (en) * 1988-11-17 1993-03-02 Nikon Corporation Exposure control apparatus
DE3933491A1 (en) * 1989-10-06 1991-04-18 Endress Hauser Gmbh Co ARRANGEMENT FOR CONVERTING AN ELECTRICAL INPUT SIZE INTO A PROPORTIONAL ELECTRICAL SIGNAL
JP2843191B2 (en) * 1992-01-30 1999-01-06 富士通株式会社 Electronic device drive circuit
EP0557542B1 (en) * 1992-02-25 1995-09-20 Hewlett-Packard GmbH Optical attenuator
US5764172A (en) * 1996-04-05 1998-06-09 Trimble Navigation Limited Hybrid DAC suitable for use in a GPS receiver
JPH09318486A (en) 1996-05-31 1997-12-12 Ando Electric Co Ltd Testing device of light attenuator
JPH10335724A (en) * 1997-05-30 1998-12-18 Kyocera Corp Temperature control circuit of semiconductor laser
GB2329721A (en) 1997-09-24 1999-03-31 Northern Telecom Ltd Optical attenuator
US5966493A (en) 1998-02-20 1999-10-12 Molecular Optoelectronics Corporation Fiber optic attenuators and attenuation systems
US6151438A (en) * 1998-09-24 2000-11-21 Lucent Technologies Inc. Fiber device having variable refractive index region proximal the core
AU2001242576A1 (en) * 2000-03-23 2001-10-03 Marconi Communications Limited Method and apparatus for generating a pulse width modulated signal and optical attenuator controlled by a pulse width modulated signal
GB2360602B (en) * 2000-03-23 2002-05-01 Marconi Comm Ltd Optical attenuator including dual control loops
US6404970B1 (en) * 2000-05-22 2002-06-11 Jds Uniphase Inc. Variable optical attenuator
US7016560B2 (en) * 2001-02-28 2006-03-21 Lightwave Microsystems Corporation Microfluidic control for waveguide optical switches, variable attenuators, and other optical devices
US6853758B2 (en) * 2002-07-12 2005-02-08 Optimer Photonics, Inc. Scheme for controlling polarization in waveguides
US6700517B1 (en) * 2002-12-24 2004-03-02 The United States Of America As Represented By The Secretary Of The Navy Photonic analog-to-digital converter

Also Published As

Publication number Publication date
EP1269628B1 (en) 2008-09-10
CN1419742A (en) 2003-05-21
EP1978640A3 (en) 2008-10-22
US20030161639A1 (en) 2003-08-28
EP1269628A1 (en) 2003-01-02
DE60135734D1 (en) 2008-10-23
EP1978640A2 (en) 2008-10-08
CN100417020C (en) 2008-09-03
US6934458B2 (en) 2005-08-23
US6747778B2 (en) 2004-06-08
WO2001071914A1 (en) 2001-09-27
JP2003528524A (en) 2003-09-24
US20040156642A1 (en) 2004-08-12

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