WO1996028936A3 - Linear multi-output optical transmitter system - Google Patents

Linear multi-output optical transmitter system Download PDF

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Publication number
WO1996028936A3
WO1996028936A3 PCT/US1996/003199 US9603199W WO9628936A3 WO 1996028936 A3 WO1996028936 A3 WO 1996028936A3 US 9603199 W US9603199 W US 9603199W WO 9628936 A3 WO9628936 A3 WO 9628936A3
Authority
WO
WIPO (PCT)
Prior art keywords
output optical
continuous wave
optical transmitter
transmitter system
linear multi
Prior art date
Application number
PCT/US1996/003199
Other languages
French (fr)
Other versions
WO1996028936A2 (en
Inventor
Joseph E Nemecek
Michael J Noonan
Amaresh Mahapatra
Original Assignee
Fiber Optic Network Solutions
Joseph E Nemecek
Michael J Noonan
Amaresh Mahapatra
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 US08/398,987 external-priority patent/US5875048A/en
Application filed by Fiber Optic Network Solutions, Joseph E Nemecek, Michael J Noonan, Amaresh Mahapatra filed Critical Fiber Optic Network Solutions
Priority to US08/913,042 priority Critical patent/US6163395A/en
Priority to EP96922373A priority patent/EP0813797A2/en
Priority to JP8527741A priority patent/JPH11502083A/en
Priority to US08/670,722 priority patent/US5953139A/en
Publication of WO1996028936A2 publication Critical patent/WO1996028936A2/en
Publication of WO1996028936A3 publication Critical patent/WO1996028936A3/en

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00Television systems
    • H04N7/22Adaptations for optical transmission
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B10/00Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/50Transmitters
    • H04B10/501Structural aspects
    • H04B10/503Laser transmitters
    • H04B10/505Laser transmitters using external modulation
    • H04B10/5053Laser transmitters using external modulation using a parallel, i.e. shunt, combination of modulators
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B10/00Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/50Transmitters
    • H04B10/501Structural aspects
    • H04B10/503Laser transmitters
    • H04B10/505Laser transmitters using external modulation
    • H04B10/5057Laser transmitters using external modulation using a feedback signal generated by analysing the optical output
    • H04B10/50572Laser transmitters using external modulation using a feedback signal generated by analysing the optical output to control the modulating signal amplitude including amplitude distortion
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B10/00Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/50Transmitters
    • H04B10/501Structural aspects
    • H04B10/503Laser transmitters
    • H04B10/505Laser transmitters using external modulation
    • H04B10/5057Laser transmitters using external modulation using a feedback signal generated by analysing the optical output
    • H04B10/50575Laser transmitters using external modulation using a feedback signal generated by analysing the optical output to control the modulator DC bias
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B10/00Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/50Transmitters
    • H04B10/501Structural aspects
    • H04B10/503Laser transmitters
    • H04B10/505Laser transmitters using external modulation
    • H04B10/5059Laser transmitters using external modulation using a feed-forward signal generated by analysing the optical or electrical input
    • H04B10/50593Laser transmitters using external modulation using a feed-forward signal generated by analysing the optical or electrical input to control the modulating signal amplitude including amplitude distortion

Abstract

A high fidelity, multi-output optical transmission system is configured utilizing a high power continuous wave YAG laser, multiport splitters, and linearized external modulation. An electro-optical modulator design in combination with a continuous wave laser, power splits and couplers attains a multi-octave bandwith transmitter possessing improved second and third order distortion characteristics. The system includes multiple individually modulated transmitter outputs which effectively provides bandwidth multiplication with full redundancy for increased transmission reliability.
PCT/US1996/003199 1995-03-06 1996-03-06 Linear multi-output optical transmitter system WO1996028936A2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US08/913,042 US6163395A (en) 1995-03-06 1996-03-06 Linear multi-output optical transmitter system
EP96922373A EP0813797A2 (en) 1995-03-06 1996-03-06 Linear multi-output optical transmitter system
JP8527741A JPH11502083A (en) 1995-03-06 1996-03-06 Linear multi-output optical transmission system
US08/670,722 US5953139A (en) 1996-03-06 1996-06-21 Wavelength division multiplexing system

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US08/398,987 1995-03-06
US08/398,987 US5875048A (en) 1995-03-06 1995-03-06 Linear multi-output optical transmitter system
US08/563,678 US5710653A (en) 1995-03-06 1995-11-28 Linear multi-output optical transmitter system
US08/563,678 1995-11-28

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US08/670,722 Continuation-In-Part US5953139A (en) 1996-03-06 1996-06-21 Wavelength division multiplexing system

Publications (2)

Publication Number Publication Date
WO1996028936A2 WO1996028936A2 (en) 1996-09-19
WO1996028936A3 true WO1996028936A3 (en) 1996-11-07

Family

ID=27016456

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1996/003199 WO1996028936A2 (en) 1995-03-06 1996-03-06 Linear multi-output optical transmitter system

Country Status (6)

Country Link
US (2) US5710653A (en)
EP (1) EP0813797A2 (en)
JP (1) JPH11502083A (en)
KR (1) KR19980702758A (en)
CA (1) CA2213008A1 (en)
WO (1) WO1996028936A2 (en)

Families Citing this family (55)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5710653A (en) * 1995-03-06 1998-01-20 Fiber Optic Network Solutions Corp. Linear multi-output optical transmitter system
FR2741218B1 (en) * 1995-11-09 1997-12-12 Thomson Broadcast Systems METHOD AND DEVICE FOR ESTIMATING NON-LINEARITY
EP0906668B1 (en) * 1996-06-03 2006-11-29 Scientific-Atlanta, Inc. Apparatus for automatic sensing of line amplifier configuration for status monitoring
US5850305A (en) * 1996-12-18 1998-12-15 Scientific-Atlanta, Inc. Adaptive predistortion control for optical external modulation
US5970185A (en) * 1997-10-31 1999-10-19 Northern Telecom Limited Optical switches, modulators and transmitters
US6654958B1 (en) * 1997-12-16 2003-11-25 Koninklijke Philips Electronics N.V. Reference signal generator for return path aligning
US6426822B1 (en) * 1998-06-25 2002-07-30 Ipicom, Inc. Method and apparatus for reducing non-linear characteristics of a signal modulator by coherent data collection
US6531700B1 (en) * 1998-09-08 2003-03-11 Lockheed Martin Corporation Integral charge well for QWIP FPA'S
US6147757A (en) * 1999-02-23 2000-11-14 Alliance Fiber Optics Products, Inc. Apparatus and method employing depolarization to eliminate effect of polarization dependent loss
JP3487217B2 (en) * 1999-05-12 2004-01-13 日本電気株式会社 Optical transmitter and optical transmission device using the same
US6341031B1 (en) * 1999-05-25 2002-01-22 Jds Uniphase Corporation Optical pulse generation using a high order function waveguide interferometer
US7079780B1 (en) * 1999-05-28 2006-07-18 Northrop Grumman Corporation Linearized optical link using a single Mach-Zehnder modulator and two optical carriers
US6583906B1 (en) * 1999-06-30 2003-06-24 Koninklijke Philips Electronics N.V. Pre-shaping laser modulation signals to increase modulation index
DE19953332C1 (en) 1999-11-05 2001-08-09 Siemens Ag Method and arrangement for optimizing an optical transmission signal modulated with a binary data signal
CN1435019A (en) * 1999-12-24 2003-08-06 康宁O.T.I股份公司 Method of analog modulation and optical emitter using this method
US6687466B1 (en) * 2000-01-06 2004-02-03 Adc Telecommunications, Inc. Dynamic distortion control
JP2002023119A (en) * 2000-06-30 2002-01-23 Mitsubishi Electric Corp Optical transmitter and control method for stabilizing output of light modulator using the same
US6700696B2 (en) * 2000-08-09 2004-03-02 Jds Uniphase Corporation High order fiber Raman amplifiers
JP3387483B2 (en) * 2000-08-31 2003-03-17 日本電気株式会社 Optical direct amplifier and control method thereof
US6847477B2 (en) 2001-02-28 2005-01-25 Kilolamdia Ip Limited Optical system for converting light beam into plurality of beams having different wavelengths
US7082268B2 (en) * 2001-05-31 2006-07-25 Teradvance Communications, Llc Method and system for 80 and 160 gigabit-per-second QRZ transmission in 100 GHz optical bandwidth with enhanced receiver performance
US7236708B2 (en) * 2001-10-25 2007-06-26 Nippon Telegraph And Telephone Corporation Optical communication system with optical output level control function
JP3637323B2 (en) * 2002-03-19 2005-04-13 株式会社東芝 Reception device, transmission / reception device, and reception method
US6690508B2 (en) 2002-03-26 2004-02-10 Fujitsu Network Communications, Inc. Control system and method for an optical amplifier
JP3881270B2 (en) * 2002-03-26 2007-02-14 富士通株式会社 Drive control device and drive control method for optical modulator
GB2417333B (en) * 2004-08-13 2008-07-16 Bookham Technology Plc Automatic bias controller for an optical modulator
US7747174B2 (en) * 2004-09-08 2010-06-29 Avago Technologies Fiber Ip (Singapore) Pte. Ltd. Multi-channel fabry-perot laser transmitters and methods of generating multiple modulated optical signals
US7302185B2 (en) * 2005-03-08 2007-11-27 Harris Corporation Device and method for millimeter wave detection and block conversion
US8532499B2 (en) * 2005-10-25 2013-09-10 Emcore Corporation Optical transmitter with adaptively controlled optically linearized modulator
US7590392B2 (en) * 2005-10-31 2009-09-15 Intel Corporation Transmitter compensation
US7853155B2 (en) * 2005-12-12 2010-12-14 Emcore Corporation Method for adjusting bias in optical transmitter with external modulator
US7245809B1 (en) * 2005-12-28 2007-07-17 Adc Telecommunications, Inc. Splitter modules for fiber distribution hubs
JP2007248850A (en) * 2006-03-16 2007-09-27 Oki Electric Ind Co Ltd Mach-zehnder type semiconductor element and control method thereof
WO2008048434A2 (en) * 2006-10-07 2008-04-24 Sioptical, Inc. Segmented optical modulator
US9014571B2 (en) * 2006-11-01 2015-04-21 Arris Technology, Inc. Small form pluggable analog optical transmitter
US7734189B2 (en) * 2006-11-30 2010-06-08 Avago Technologies Fiber Ip (Singapore) Pte. Ltd. Parallel channel optical communication using modulator array and shared laser
US8396369B1 (en) * 2007-09-28 2013-03-12 Aurora Networks, Inc. Method and system for propagating upstream cable modem signals and RF return video control signals over the same optical network
US7967995B2 (en) * 2008-03-31 2011-06-28 Tokyo Electron Limited Multi-layer/multi-input/multi-output (MLMIMO) models and method for using
US8238014B2 (en) * 2008-09-08 2012-08-07 Luxtera Inc. Method and circuit for encoding multi-level pulse amplitude modulated signals using integrated optoelectronic devices
US8060028B1 (en) 2009-05-07 2011-11-15 The United States Of America As Represented By The Secretary Of The Navy Multi-spectrum high data rate communications system with electromagnetic interference cancellation
US8849071B2 (en) * 2009-12-30 2014-09-30 Jds Uniphase Corporation Optical waveguide modulator
US8625991B1 (en) 2010-08-04 2014-01-07 Juniper Networks, Inc. Amortization of expensive optical components
JP2011100168A (en) * 2011-02-21 2011-05-19 Sumitomo Osaka Cement Co Ltd Optical waveguide element
CN202231722U (en) * 2011-10-18 2012-05-23 华为技术有限公司 Repeater
US8798472B2 (en) * 2012-07-10 2014-08-05 Telefonaktiebolaget L M Ericsson Agile light source provisioning for information and communications technology systems
US20150198859A1 (en) * 2012-12-11 2015-07-16 Acacia Communications Inc. Simplified extinction ratio control for multiple mach-zehnder interferometer modulators
US9472685B2 (en) * 2013-04-05 2016-10-18 Joshua D. Kaggie Methods of circuit construction to improve diode performance
BR112016005009B1 (en) * 2013-10-10 2020-09-15 Halliburton Energy Services, Inc OPTICAL COMPUTER DEVICE AND METHOD
US10038503B2 (en) * 2014-08-13 2018-07-31 Xilinx, Inc. Adaptive optical channel compensation
US9729244B2 (en) 2014-10-20 2017-08-08 Adva Optical Networking Se Apparatus and method for monitoring signal quality of a modulated optical signal
EP3029512A1 (en) * 2014-12-02 2016-06-08 Xieon Networks S.à r.l. Spectral inversion detection for polarization-division multiplexed optical transmission
US9941958B2 (en) * 2015-12-15 2018-04-10 Futurewei Technologies, Inc. On-chip test interface for voltage-mode Mach-Zehnder modulator driver
EP3479502B1 (en) * 2016-07-01 2021-12-01 Luxtera, Inc. Redundant laser sources in an integrated modulator
JP6233480B1 (en) * 2016-09-20 2017-11-22 富士通オプティカルコンポーネンツ株式会社 Light modulator
JP6988076B2 (en) * 2016-11-28 2022-01-05 日本電気株式会社 Optical modulator and light modulator control method

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2011611A (en) * 1977-12-07 1979-07-11 Grandison Trading Co Ltd Video signal transmission and receiving apparatus using optical paths
EP0251748A1 (en) * 1986-07-01 1988-01-07 BRITISH TELECOMMUNICATIONS public limited company Optical transmission system
US5400166A (en) * 1992-10-20 1995-03-21 General Instrument Corporation Communication of signals sharing a single optical source

Family Cites Families (44)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3952260A (en) * 1974-12-16 1976-04-20 Delta-Benco-Cascade Limited Distortion correction circuit
JPS54103055A (en) * 1978-01-31 1979-08-14 Nippon Telegr & Teleph Corp <Ntt> Spectrometer
JPS5593338A (en) * 1979-01-09 1980-07-15 Matsushita Electric Ind Co Ltd Optical multiplex transmission system
IT1178484B (en) * 1984-06-07 1987-09-09 Italtel Spa DEMULTIPLATOR (MULTIPLATOR) FOR OPTICAL FIBER TRANSMISSION SYSTEMS
US4658394A (en) * 1984-12-12 1987-04-14 Bell Communications Research, Inc. Optical transmission
US4775971A (en) * 1986-03-27 1988-10-04 American Telephone And Telegraph Company, At&T Bell Laboratories Optical communication system
JPH0681119B2 (en) * 1986-04-17 1994-10-12 日本電気株式会社 WDM optical transmission system
US4715027A (en) * 1986-05-29 1987-12-22 Polaroid Corporation Integrated optic multi/demultiplexer
US4768849A (en) * 1986-09-15 1988-09-06 Hicks Jr John W Filter tap for optical communications systems
JPH02277008A (en) * 1989-04-19 1990-11-13 Fujitsu Ltd Multiplex wavelength optical transmission equipment
US5002353A (en) * 1989-04-25 1991-03-26 Massachusetts Institute Of Technology Apparatus and method for reducing modulator nonlinearities
US5161044A (en) * 1989-07-11 1992-11-03 Harmonic Lightwaves, Inc. Optical transmitters linearized by means of parametric feedback
US5031235A (en) * 1989-10-27 1991-07-09 Hoechst Celanese Corp. Cable system incorporating highly linear optical modulator
US5547274A (en) * 1990-03-14 1996-08-20 Orchard Communications Inc. Modulated light source with a linear transfer function
JPH04119023A (en) * 1990-09-10 1992-04-20 Canon Inc Optical transmission system
US5210633A (en) * 1990-09-12 1993-05-11 General Instrument Corporation Apparatus and method for linearizing the operation of an external optical modulator
SE467330B (en) * 1990-10-03 1992-06-29 Ericsson Telefon Ab L M SET TO LINEARIZE A TRANSFER FUNCTION WITH A MODULATOR DEVICE AND MODULATOR DEVICE WITH LINEARIZED TRANSFER FUNCTION
US5107360A (en) * 1990-11-05 1992-04-21 General Instrument Corporation Optical transmission of RF subcarriers in adjacent signal bands
US5119447A (en) * 1990-11-06 1992-06-02 General Instrument Corporation Apparatus and method for externally modulating an optical carrier
US5239401A (en) * 1990-12-31 1993-08-24 Gte Laboratories Incorporated Optical modulator for cancellation of second-order intermodulation products in lightwave systems
US5199086A (en) * 1991-01-17 1993-03-30 Massachusetts Institute Of Technology Electro-optic system
US5109441A (en) * 1991-01-18 1992-04-28 General Instrument Corporation Fiber optic external modulator
US5148503A (en) * 1991-05-29 1992-09-15 Crystal Technology, Inc Apparatus and method for linearized cascade coupled integrated optical modulator
US5309532A (en) * 1991-12-02 1994-05-03 The Regents Of The University Of California Electro-optic intensity modulator with improved linearity
US5230028A (en) * 1991-12-02 1993-07-20 The Regents Of The University Of California Electro-optic intensity modulator with improved linearity
US5361156A (en) * 1991-12-09 1994-11-01 Scientific-Atlanta, Inc. Method and apparatus for predistortion
US5168534A (en) * 1991-12-09 1992-12-01 United Technologies Corporation Cascaded optic modulator arrangement
US5157744A (en) * 1991-12-16 1992-10-20 At&T Bell Laboratories Soliton generator
US5222089A (en) * 1992-01-08 1993-06-22 General Instrument Corporation Optical signal source for overcoming distortion generated by an optical amplifier
US5249243A (en) * 1992-05-21 1993-09-28 Siemens Components, Inc. Apparatus and method for cascade coupled integrated optical phase modulator for linearization of signal transfer
US5327279A (en) * 1992-07-17 1994-07-05 United Technologies Corporation Apparatus for linearization of optic modulators using a feed-forward predistortion circuit
US5293545A (en) * 1992-07-27 1994-03-08 General Instrument Corporation Optical source with reduced relative intensity noise
US5278923A (en) * 1992-09-02 1994-01-11 Harmonic Lightwaves, Inc. Cascaded optical modulation system with high linearity
US5321543A (en) * 1992-10-20 1994-06-14 General Instrument Corporation Apparatus and method for linearizing an external optical modulator
US5373389A (en) * 1992-10-27 1994-12-13 General Instrument Corporation Method for linearizing an unbalanced Mach Zehnder optical frequency discriminator
US5526155A (en) * 1993-11-12 1996-06-11 At&T Corp. High-density optical wavelength division multiplexing
US5473460A (en) * 1994-07-25 1995-12-05 At&T Corp. Adaptive equalizer for analog optical signal transmission
JPH10508116A (en) * 1994-10-19 1998-08-04 ブリティッシュ・テレコミュニケーションズ・パブリック・リミテッド・カンパニー All-optical processing in communication systems
US5488503A (en) * 1995-02-09 1996-01-30 Hughes Aircraft Company Low-power, stabilized, photonic modulator system
US5875048A (en) * 1995-03-06 1999-02-23 Cfx Communication Systems,Llc Linear multi-output optical transmitter system
US5710653A (en) * 1995-03-06 1998-01-20 Fiber Optic Network Solutions Corp. Linear multi-output optical transmitter system
US5504609A (en) * 1995-05-11 1996-04-02 Ciena Corporation WDM optical communication system with remodulators
US5583683A (en) * 1995-06-15 1996-12-10 Optical Corporation Of America Optical multiplexing device
US5557439A (en) * 1995-07-25 1996-09-17 Ciena Corporation Expandable wavelength division multiplexed optical communications systems

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2011611A (en) * 1977-12-07 1979-07-11 Grandison Trading Co Ltd Video signal transmission and receiving apparatus using optical paths
EP0251748A1 (en) * 1986-07-01 1988-01-07 BRITISH TELECOMMUNICATIONS public limited company Optical transmission system
US5400166A (en) * 1992-10-20 1995-03-21 General Instrument Corporation Communication of signals sharing a single optical source

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
MOSHE NAZARATHY ET AL: "STRUCTURED ARCHITECTURES FOR CATV DISTRIBUTION WITH EXTERNALLY MODULATED SOLID STATE LASER TRANSMITTER", PROCEEDINGS FROM ELEVEN TECHNICAL SESSIONS OF THE ANNUAL CONVENTION AND EXPOSITION OF THE NATIONAL CABLE TELEVISION ASSOCIATION, SAN FRANCISCO, JUNE 6 - 9, 1993, no. CONVENTION 42, 6 June 1993 (1993-06-06), RUTKOWSKI K, pages 365 - 367, XP000410520 *
TAN H H: "CATV DISTRIBUTION OVER AN OPTICAL FIBER WITH A LINEARIZED MACH ZEHNDER MODULATOR AND A RIN REDUCED LASER", CABLE TV SESSIONS, MONTREUX, JUNE 13 - 18, 1991, no. SYMP. 17, 14 June 1992 (1992-06-14), CCITT, pages 91 - 96, XP000260032 *

Also Published As

Publication number Publication date
JPH11502083A (en) 1999-02-16
WO1996028936A2 (en) 1996-09-19
EP0813797A2 (en) 1997-12-29
CA2213008A1 (en) 1996-09-19
US5710653A (en) 1998-01-20
KR19980702758A (en) 1998-08-05
US6163395A (en) 2000-12-19

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