IN2014DN09139A - - Google Patents

Info

Publication number
IN2014DN09139A
IN2014DN09139A IN9139DEN2014A IN2014DN09139A IN 2014DN09139 A IN2014DN09139 A IN 2014DN09139A IN 9139DEN2014 A IN9139DEN2014 A IN 9139DEN2014A IN 2014DN09139 A IN2014DN09139 A IN 2014DN09139A
Authority
IN
India
Prior art keywords
modulator
bias voltage
output power
defined range
pre defined
Prior art date
Application number
Inventor
Andrew James Smith
Mohammed Nawaz
Original Assignee
Bae Systems Plc
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 Bae Systems Plc filed Critical Bae Systems Plc
Publication of IN2014DN09139A publication Critical patent/IN2014DN09139A/en

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
    • G02F1/0123—Circuits for the control or stabilisation of the bias voltage, e.g. automatic bias control [ABC] feedback loops
    • 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 
    • G02F1/21—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  by interference
    • G02F1/212—Mach-Zehnder type
    • 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 
    • G02F1/21—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  by interference
    • G02F1/225—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  by interference in an optical waveguide structure
    • 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 
    • G02F1/21—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  by interference
    • G02F1/225—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  by interference in an optical waveguide structure
    • G02F1/2255—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  by interference in an optical waveguide structure controlled by a high-frequency electromagnetic component in an electric waveguide structure
    • 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
    • H04B10/50—Transmitters
    • H04B10/501—Structural aspects
    • H04B10/503—Laser transmitters
    • H04B10/505—Laser transmitters using external modulation
    • 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
    • H04B10/50—Transmitters
    • H04B10/501—Structural aspects
    • H04B10/503—Laser transmitters
    • H04B10/505—Laser transmitters using external modulation
    • H04B10/5057—Laser transmitters using external modulation using a feedback signal generated by analysing the optical output
    • H04B10/50575—Laser transmitters using external modulation using a feedback signal generated by analysing the optical output to control the modulator DC bias
    • 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
    • H04B10/50—Transmitters
    • H04B10/501—Structural aspects
    • H04B10/503—Laser transmitters
    • H04B10/505—Laser transmitters using external modulation
    • H04B10/5059—Laser transmitters using external modulation using a feed-forward signal generated by analysing the optical or electrical input
    • H04B10/50595—Laser transmitters using external modulation using a feed-forward signal generated by analysing the optical or electrical input to control the modulator DC bias

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Optics & Photonics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
  • Optical Communication System (AREA)

Abstract

Methods and apparatus for controlling a bias voltage (20) supplied to an optical modulator that comprises a biasable component configurable to be biased by application of the bias voltage (20) the method comprising: providing a target for the modulator output power; applying to the biasable component a bias voltage (20) that biases the biasable component so that the output power is within a pre defined range of the target; monitoring the output power and if the output power of the modulator is determined to be outside the pre defined range varying the value of the bias voltage (20) to bring the output power back within the pre defined range; and monitoring the optical input to the modulator and if it has been disabled maintaining the bias voltage (20) at its current level for a pre determined length of time that is dependent upon how long the modulator has been operating at quadrature.
IN9139DEN2014 2012-05-02 2013-04-30 IN2014DN09139A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB1207689.9A GB2502261A (en) 2012-05-02 2012-05-02 Controlling a bias voltage for an optical modulator
PCT/GB2013/051113 WO2013164604A1 (en) 2012-05-02 2013-04-30 Controlling bias voltages for optical modulators

Publications (1)

Publication Number Publication Date
IN2014DN09139A true IN2014DN09139A (en) 2015-05-22

Family

ID=46330687

Family Applications (1)

Application Number Title Priority Date Filing Date
IN9139DEN2014 IN2014DN09139A (en) 2012-05-02 2013-04-30

Country Status (10)

Country Link
US (1) US9846318B2 (en)
EP (1) EP2845049B1 (en)
KR (1) KR102001896B1 (en)
BR (1) BR112014027358B1 (en)
CL (1) CL2014002960A1 (en)
ES (1) ES2573837T3 (en)
GB (1) GB2502261A (en)
IN (1) IN2014DN09139A (en)
PL (1) PL2845049T3 (en)
WO (1) WO2013164604A1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK2845048T3 (en) * 2012-05-02 2017-06-06 Bae Systems Plc REGULATION OF PRESSURES FOR OPTICAL MODULATORS
GB2502261A (en) 2012-05-02 2013-11-27 Bae Systems Plc Controlling a bias voltage for an optical modulator
WO2015063438A1 (en) * 2013-11-01 2015-05-07 Bae Systems Plc Finding bias voltages for optical modulators
WO2015063437A1 (en) * 2013-11-01 2015-05-07 Bae Systems Plc Controlling bias voltages for optical modulators
US10243662B2 (en) * 2015-05-27 2019-03-26 Hewlett Packard Enterprise Development Lp Bias-based Mach-Zehnder modulation (MZM) systems
KR101813784B1 (en) 2016-02-04 2017-12-29 연세대학교 산학협력단 Apparatus and method of controlling optical modulator bias based on eye-amplitude monitoring
JP2018205288A (en) * 2017-05-31 2018-12-27 ソニーセミコンダクタソリューションズ株式会社 Distance measurement device, distance measurement method, and program

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2518138B2 (en) * 1993-06-25 1996-07-24 日本電気株式会社 Light modulator
US6700907B2 (en) * 2000-11-20 2004-03-02 Jds Uniphase Corporation Mach-Zehnder modulator bias and driver gain control mechanism
GB0103072D0 (en) * 2001-02-08 2001-03-21 Marconi Comm Ltd Interferometer
KR100450745B1 (en) 2001-12-07 2004-10-01 한국전자통신연구원 Apparatus and method for controlling electro-optic modulator
WO2008059198A1 (en) * 2006-11-16 2008-05-22 Bae Systems Plc Bias controller for an optical modulator
JP2010501908A (en) * 2007-12-04 2010-01-21 ビ−エイイ− システムズ パブリック リミテッド カンパニ− Bias control device
CN101354515B (en) * 2008-09-05 2012-04-04 中兴通讯股份有限公司 Method and device for control bias of laser modulator
WO2011132283A1 (en) * 2010-04-22 2011-10-27 富士通株式会社 Optical modulation device, drive method for optical modulation device, and production method for optical modulation device
GB2502261A (en) 2012-05-02 2013-11-27 Bae Systems Plc Controlling a bias voltage for an optical modulator

Also Published As

Publication number Publication date
EP2845049B1 (en) 2016-04-27
KR20150013678A (en) 2015-02-05
WO2013164604A1 (en) 2013-11-07
ES2573837T3 (en) 2016-06-10
CL2014002960A1 (en) 2015-04-24
GB201207689D0 (en) 2012-06-13
EP2845049A1 (en) 2015-03-11
KR102001896B1 (en) 2019-07-19
BR112014027358A2 (en) 2017-06-27
BR112014027358B1 (en) 2022-02-01
US20150110437A1 (en) 2015-04-23
GB2502261A (en) 2013-11-27
US9846318B2 (en) 2017-12-19
BR112014027358A8 (en) 2021-03-16
PL2845049T3 (en) 2017-08-31

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