WO2000001097A1 - Procede et dispositif pour la transmission optique de donnees par l'intermediaire de guides d'ondes lumineuses - Google Patents

Procede et dispositif pour la transmission optique de donnees par l'intermediaire de guides d'ondes lumineuses Download PDF

Info

Publication number
WO2000001097A1
WO2000001097A1 PCT/DE1999/001864 DE9901864W WO0001097A1 WO 2000001097 A1 WO2000001097 A1 WO 2000001097A1 DE 9901864 W DE9901864 W DE 9901864W WO 0001097 A1 WO0001097 A1 WO 0001097A1
Authority
WO
WIPO (PCT)
Prior art keywords
optical
partial signals
signal
information signal
transmission
Prior art date
Application number
PCT/DE1999/001864
Other languages
German (de)
English (en)
Inventor
Claus-Georg MÜLLER
Original Assignee
Ams Optotech Vertrieb Gmbh
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 Ams Optotech Vertrieb Gmbh filed Critical Ams Optotech Vertrieb Gmbh
Publication of WO2000001097A1 publication Critical patent/WO2000001097A1/fr

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
    • H04B10/2513—Arrangements specific to fibre transmission for the reduction or elimination of distortion or dispersion due to chromatic dispersion
    • 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
    • H04B10/2581—Multimode transmission
    • 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
    • H04B10/516—Details of coding or modulation
    • H04B10/532—Polarisation modulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/06—Polarisation multiplex systems

Definitions

  • the invention relates to a method and a device for optical data transmission via optical fibers.
  • an electrical signal is usually converted by means of an optical transmission element, for example a laser diode, into an optical signal with a transmission spectrum with a specific central wavelength and a specific optical bandwidth and is coupled into an optical waveguide.
  • an optical transmission element for example a laser diode
  • the signal is converted optically and electrically and processed further.
  • amplifiers are usually used in the transmission link. This can be a conventional repeater amplifier or optical amplifier, e.g. Fiber amplifier, act. However, only a fraction of the transmission capacity of an optical fiber is used in this method.
  • optical waveguide To make better use of the transmission capacity of an optical waveguide, it is known to transmit a plurality of electrical information signals in wavelength division multiplexing or polarization multiplexing via a single optical waveguide.
  • the individual electrical signals are each converted into optical information signals, the optical transmission elements, usually narrow-band ones
  • Laser diodes each generating optical signals with a transmission spectrum with different center wavelengths or optical signals with mutually orthogonal polarization directions. These optical signals will be then combined using a mostly passive coupler to form an optical wavelength division multiplex signal and transmitted to a single optical waveguide. At the end of the transmission path, the wavelength division multiplex signal is again divided into the individual optical signals. These are implemented optically and electrically for further processing.
  • the transmission system is usually designed simultaneously with the planning of the transmission route. This has the advantage that
  • Transmission system and transmission route can be optimally matched to the respective application.
  • the transmission path is designed so that the total attenuation and in particular the entire dispersion or the optical bandwidth in each optical channel enables the transmission of the signal in question.
  • multimode multimode
  • the bandwidth limitation often plays a larger role than the attenuation limitation. If necessary, repeater amplifiers must then be used in the line. However, this is associated with a relatively high outlay, since for this purpose, complex structural measures are usually required in addition to the necessary circuitry outlay.
  • the present invention is therefore based on the object of providing a method for optical data transmission via optical waveguides and / or transmitting and receiving units suitable for this purpose, the transmission of a signal over a bandwidth-limited or dispersion-limited path being made possible with relatively little effort.
  • the invention solves this problem with the features of claims 1 and 3 and 6.
  • the starting point for the invention is, for example, the case that an (electrical) information signal is present at the beginning of a transmission link, which is no longer or no longer transmitted with the desired quality due to the dispersion limitation or bandwidth limitation of the present transmission link or the individual optical fibers of the transmission link can.
  • the information signal is preferably a uniform signal, for example the signal for a television channel,
  • Voice channel or the like.
  • it can also already be an information signal that contains several individual pieces of information, for example several television or voice channels.
  • Such a combined information signal is usually available as a time-division multiplex signal.
  • the invention is now based on the knowledge that such an information signal, which cannot be transmitted as a uniform optical signal over the existing transmission path, is first split into several partial signals, each partial signal is converted into an optical partial signal and the optical partial signals are simultaneously applied the existing optical transmission path are transmitted.
  • the partial optical signals have a spectrum of different center wavelengths or a different optical carrier frequency and / or different orthogonal polarization directions.
  • the optical partial signals at the end of the transmission path can be converted into individual optical signals in a corresponding receiving unit Partial signals are separated and converted into electrical partial signals. The partial electrical signals can then in turn be combined to form the original information signal.
  • Transmitter and receiver units are particularly suitable for increasing the capacity of existing transmission links, especially in the case of multimode optical fibers.
  • the electrical information signal with higher bandwidth or higher bit rate generated to increase the capacity only has to be supplied to a transmission unit according to the invention and the optical output of the
  • Transmitter unit can be connected to the existing transmission path.
  • the optical output of the transmission link must be connected to the input of a receiving unit according to the invention and In turn the receiving unit produces the transmitted information signal with a higher bandwidth or higher bit rate. Structural interventions in the transmission path, as would be the case when using repeater amplifiers, are not necessary.
  • the information signal which is present in digital form, is broken down into partial digital signals according to a pre-determined processing instruction.
  • a pre-determined processing instruction for example, every nth bit or every nth group of m bits can be assigned to one of n partial signals.
  • the bit duration of the partial signals can in each case be chosen to be greater by a factor n than the bit duration of the original digital information signal.
  • the combination of the transmitted optical partial signals and converted into electrical partial signals can then take place in the reverse manner.
  • one bit or a group of m bits of one of the n partial signals are successively combined to form the original digital information signal in a defined sequence. If the bit duration of the partial signals for transmission over the optical transmission link has been increased, this must of course be reduced again by the appropriate factor before it is possible to combine them into the electrical information signal.
  • the single drawing shows a schematic representation of a system for optical data transmission over a single optical waveguide according to the invention.
  • the system for optical data transmission shown in the figure comprises a transmission unit 3, the output 5 of which is connected to a transmission link 7.
  • the transmission link is an optical waveguide, which is usually provided within a laid cable.
  • the system 1 for optical data transmission comprises a receiving unit 9, the optical input 11 of which is connected to the end of the transmission link 7 or the optical waveguide in question.
  • An electrical information signal S e i is fed to the electrical input 13 of the transmission unit 3.
  • the transmission unit 3 comprises a transmission
  • the electrical information signal S e ⁇ it may be for example a digital signal with a predetermined (high) bit rate act, wherein the transmitting Signalverabeitungsiser 15 from the signal present at input 13 information signal S e i partial signals S e n to S e i n generated which have a lower bit rate, preferably a factor of n.
  • the transmission signal processing unit 15 can assign each nth bit or every nth group of m bits of the original information signal S e ⁇ to the individual partial signals in a predetermined order.
  • the transmission signal processing unit 15 supplies each of the partial signals S ell to S e n n generated by it to an optical transmission element 17 1 to 17 n .
  • Each of the opti- see transmission elements converts the relevant electrical partial signal S e n to S eln into an optical partial signal S opt ⁇ to S optn .
  • the individual optical partial signals are combined by means of an optical coupling unit 19 to form an optical information signal S opt , which is fed to the transmission link 7.
  • Each of the optical partial signals S opt ⁇ to S optn has a transmission spectrum with a different center wavelength, the distances between adjacent center wavelengths being selected such that a sufficiently low crosstalk arises.
  • the partial optical signals can also have different, mutually orthogonal polarization directions, so that transmission in polarization (mode) multiplexing is possible.
  • the transmission link 7 will preferably be in the form of a polarization-maintaining single-mode fiber. In this way, two optical partial signals with mutually orthogonal polarization directions can be transmitted at each wavelength.
  • the optical information signal S opt is fed to a further optical coupling unit 21 in the receiving unit 9.
  • the optical coupling unit 21 separates the optical information signal S opt back into the individual component optical signals S i to S opt OPTN on.
  • these optical partial signals on the receiving side are referred to as the optical partial signals on the transmitting side.
  • optical optical signals on the receiving end are acted upon by the transmission characteristics of the transmission link.
  • the optical coupling units 19 and 21 can be implemented in the usual way.
  • the coupling unit 19 for example, a simple, correspondingly broadband nx 1 coupler can be used.
  • the coupling unit 21 has to perform a filter function in addition to its function of splitting into different signal paths, so that at the output the coupling unit only receives the desired optical partial signal in question.
  • the optical coupling unit 21 can be designed as a phased array. Such a phased array must have an optical input and n optical outputs in accordance with the desired topology of the coupling unit 21. The design as a phased array ensures that a bandpass filter characteristic can be achieved between the common input and each output.
  • Each optical output of the optical coupling unit 21 is connected to an optical receiving element 23 1 to 23 n , the receiving elements converting the optical partial signals S opt ⁇ to S optn into the electrical partial signals S e ⁇ to S e ⁇ n . If it is to be n the same for the information to be transmitted signal is a digital signal, the emfangs districten partial electric signals S e can ⁇ to S e ⁇ n in a row of the possible complete restoration with the empfangsseiti- gen partial electric signals S e ⁇ to S e ⁇ .
  • the reception unit 9 has a reception signal processing unit 25 for regenerating the electrical partial signals and for combining the electrical partial signals S eU to S e ⁇ n into the transmitted electrical information signal S e ⁇ .
  • the received signal processing unit 25 can combine the individual electrical partial signals into the electrical information signal S e ⁇ in such a way that that in the same order in which the electrical information signal is broken down into individual electrical partial signals, one bit or a group of m bits one of the n Partial signals S e ⁇ to S e ⁇ n taken and is assembled in this order to the digital information signal S e ⁇ .
  • the bit duration of the partial signals can be greater by a factor of n than the bit duration of the information signal to be transmitted. Has been broadcast
  • Signal processing unit 15 after the splitting of the information signal into the individual sub-signals increases the bit duration to reduce the bandwidth required for the transmission of the individual sub-signals, the received signal processing unit 25 must independently increase the bit duration before combining the electrical sub-signals into the entire information signal reduce again by the same factor.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Optical Communication System (AREA)

Abstract

L'invention concerne un procédé pour la transmission optique de données par l'intermédiaire de guides d'ondes lumineuses, procédé selon lequel le signal d'information électrique (Sel) ou optique (Sopt) à transmettre est décomposé en plusieurs signaux partiels (Sel1 à Seln) présentant respectivement une largeur de bande inférieure. Chaque signal partiel (Sel1 à Seln) est converti en un signal partiel optique (Sopt1 à Soptn) présentant respectivement une longueur d'onde moyenne différente (μ1 à μn) ou présentant une fréquence porteuse optique et/ou une polarisation orthogonale différente. Les signaux partiels optiques (Sopt1 à Soptn) sont transmis sur un guide d'ondes lumineuses formant la ligne de transmission (7), et les signaux partiels optiques (Sopt1 à Soptn) sont détectés de nouveau séparément à l'extrémité de la ligne de transmission (7) puis sont réunis pour former le signal d'information (Sel) à transmettre. L'invention concerne en outre une unité émettrice et une unité réceptrice ainsi qu'un système global de mise en oeuvre dudit procédé.
PCT/DE1999/001864 1998-06-26 1999-06-25 Procede et dispositif pour la transmission optique de donnees par l'intermediaire de guides d'ondes lumineuses WO2000001097A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19828614.7 1998-06-26
DE1998128614 DE19828614A1 (de) 1998-06-26 1998-06-26 Verfahren und Vorrichtung zur optischen Datenübertragung über Lichtwellenleiter

Publications (1)

Publication Number Publication Date
WO2000001097A1 true WO2000001097A1 (fr) 2000-01-06

Family

ID=7872170

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1999/001864 WO2000001097A1 (fr) 1998-06-26 1999-06-25 Procede et dispositif pour la transmission optique de donnees par l'intermediaire de guides d'ondes lumineuses

Country Status (2)

Country Link
DE (1) DE19828614A1 (fr)
WO (1) WO2000001097A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1039669A2 (fr) * 1999-03-04 2000-09-27 Lucent Technologies Inc. Système et procédé pour sécuriser la communication à longueurs d'ondes multiples sur fibres optiques
EP1126648A2 (fr) * 2000-02-17 2001-08-22 Hitachi, Ltd. Equipement, transpondeur et méthodes sur fibre optique
JP2008507196A (ja) * 2004-07-15 2008-03-06 エセックス コーポレーション 光タップ型遅延線を使用するプライベートおよびセキュア光通信システム
WO2016174192A1 (fr) 2015-04-29 2016-11-03 Bsn Medical Gmbh Dispositif médical pour bains
WO2016174043A1 (fr) 2015-04-29 2016-11-03 Bsn Medical Gmbh Procédé en plusieurs étapes, pour produire du no

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002058301A2 (fr) * 2001-01-09 2002-07-25 Opvista, Inc. Procede de division d'ondes et appareil permettant la transmission de donnees dans des systemes de fibres optiques longue portee
US6621612B2 (en) * 2001-03-19 2003-09-16 Teradata Technologies Limited Full spectrum optical communication system and methods thereof
WO2007044939A2 (fr) 2005-10-13 2007-04-19 Opvista Incorporated Reseaux formant anneau optique faisant appel a une sonde optique de circulation pour proteger une commutation de protection a l'aide d'une inversion automatique
US7773883B1 (en) 2007-05-04 2010-08-10 Vello Systems, Inc. Single-fiber optical ring networks based on optical double sideband modulation
US8175458B2 (en) 2007-07-17 2012-05-08 Vello Systems, Inc. Optical ring networks having node-to-node optical communication channels for carrying data traffic
US9054832B2 (en) 2009-12-08 2015-06-09 Treq Labs, Inc. Management, monitoring and performance optimization of optical networks
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

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0197263A2 (fr) * 1985-04-04 1986-10-15 International Business Machines Corporation Méthode et appareil pour l'alignement de données WDM transmises à travers un milieu dispersif
DE3716247A1 (de) * 1987-05-15 1988-11-24 Standard Elektrik Lorenz Ag Optisches nachrichtenuebertragungssystem mit wellenlaengen- und polarisations-multiplex
JPH088756A (ja) * 1994-06-24 1996-01-12 Yaskawa Electric Corp 高速シリアル伝送法及び装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0197263A2 (fr) * 1985-04-04 1986-10-15 International Business Machines Corporation Méthode et appareil pour l'alignement de données WDM transmises à travers un milieu dispersif
DE3716247A1 (de) * 1987-05-15 1988-11-24 Standard Elektrik Lorenz Ag Optisches nachrichtenuebertragungssystem mit wellenlaengen- und polarisations-multiplex
JPH088756A (ja) * 1994-06-24 1996-01-12 Yaskawa Electric Corp 高速シリアル伝送法及び装置

Non-Patent Citations (5)

* Cited by examiner, † Cited by third party
Title
HERARD C ET AL: "NEW MULTIPLEXING TECHNIQUE USING POLARIZATION OF LIGHT", APPLIED OPTICS,US,OPTICAL SOCIETY OF AMERICA,WASHINGTON, vol. 30, no. 2, 10 January 1991 (1991-01-10), pages 222-231, XP000175305, ISSN: 0003-6935 *
LEMOFF B E ET AL: "SPECTRALAN: A LOW-COST MULTIWAVELENGTH LOCAL AREA NETWORK", HEWLETT-PACKARD JOURNAL,US,HEWLETT-PACKARD CO. PALO ALTO, vol. 48, no. 5, December 1997 (1997-12-01), pages 42-52, XP000752702 *
LOEB M L ET AL: "HIGH-SPEED DATA TRANSMISSION ON AN OPTICAL FIBER USING A BYTE-WIDE WDM SYSTEM", JOURNAL OF LIGHTWAVE TECHNOLOGY,US,IEEE. NEW YORK, vol. 6, no. 8, August 1988 (1988-08-01), pages 1306-1311, XP000001587, ISSN: 0733-8724 *
PATENT ABSTRACTS OF JAPAN vol. 1996, no. 05 31 May 1996 (1996-05-31) *
TANAKA Y ET AL: "OPTICAL PARALLEL TRANSMISSION WITH MULTI-WAVELENGTH FOR HIGH SPEED COMMUNICATIONS ON INDOOR CHANNELS", IEICE TRANSACTIONS ON COMMUNICATIONS,JP,INSTITUTE OF ELECTRONICS INFORMATION AND COMM. ENG. TOKYO, vol. E81-B, no. 4, April 1998 (1998-04-01), pages 729-736, XP000780467, ISSN: 0916-8516 *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1039669A2 (fr) * 1999-03-04 2000-09-27 Lucent Technologies Inc. Système et procédé pour sécuriser la communication à longueurs d'ondes multiples sur fibres optiques
EP1039669A3 (fr) * 1999-03-04 2005-09-07 Lucent Technologies Inc. Système et procédé pour sécuriser la communication à longueurs d'ondes multiples sur fibres optiques
US7272319B1 (en) 1999-03-04 2007-09-18 Lucent Technologies Inc. System and method for secure multiple wavelength communication on optical fibers
EP1126648A2 (fr) * 2000-02-17 2001-08-22 Hitachi, Ltd. Equipement, transpondeur et méthodes sur fibre optique
EP1126648A3 (fr) * 2000-02-17 2005-04-06 Hitachi, Ltd. Equipement, transpondeur et méthodes sur fibre optique
JP2008507196A (ja) * 2004-07-15 2008-03-06 エセックス コーポレーション 光タップ型遅延線を使用するプライベートおよびセキュア光通信システム
WO2016174192A1 (fr) 2015-04-29 2016-11-03 Bsn Medical Gmbh Dispositif médical pour bains
WO2016174043A1 (fr) 2015-04-29 2016-11-03 Bsn Medical Gmbh Procédé en plusieurs étapes, pour produire du no

Also Published As

Publication number Publication date
DE19828614A1 (de) 1999-12-30

Similar Documents

Publication Publication Date Title
DE69535053T2 (de) Abstimmbare optische Einfüge-/Abzweigmethode und -apparat
DE60031055T2 (de) Optische Paket-Weiterleitung in einem Netzwerksystem basiert auf optische Etikett-Kopplungstechnik
DE69831127T2 (de) Optisches wellenlängenmultiplex-übertragungssystemen
EP0054120A1 (fr) Système de transmission à service intégré
EP1298818B1 (fr) Procédé de transmission d'au moins un premier et deuxiéme signal multiplexés en polarisation dans un système de transmission optique
DE102009025232A1 (de) Verfahren und Vorrichtung zur Übertragung optischer Informationen zwischen Senderstation und Empfängerstation über einen Mehrmoden-Lichtwellenleiter
WO2000001097A1 (fr) Procede et dispositif pour la transmission optique de donnees par l'intermediaire de guides d'ondes lumineuses
EP1356619B1 (fr) Procede et circuit electro-optique destines a la protection de ligne dans un lien de transmission de donnees wdm
DE19625806A1 (de) Endgerät für ein optisches Netz, optisches Netz und Endvermittlungsstelle hierfür
EP0053674A1 (fr) Système de transmission numérique à service intégré
EP1298826A2 (fr) Procédé de transmission d'au moins un premier et un second signaux de données multiplexés en polarisation dans un réseau de communication optique
DE3632047C2 (de) Optisches Nachrichtenübertragungssystem für Schmalband- und Breitband-Nachrichtensignale
DE69817021T2 (de) Verfahren und vorrichtung zur kodierung von wdm signalen
DE60106736T2 (de) Weichenanordnung mit wellenleitergitter und mehreren eingängen für broadcast- und multicastdienste
EP0972367A2 (fr) Reseau d'acces pour la transmission de signaux optiques
DE602004011599T2 (de) Hybrides, optisches Netzwerk und Verfahren zum Datenpaketrouting in einem hybriden, optischen Netzwerk
EP1498006B1 (fr) Station de commutation optique et procede de commutation associe
EP1588512B1 (fr) Emetteur et procede de transmission de messages sur une fibre optique
DE3203785C2 (fr)
EP0012979A1 (fr) Méthode pour la transmission de plusieurs signaux par une connexion à guide d'ondes de lumière, notamment entre un central et une jonction d'abonné
EP0990323B1 (fr) Procede de transmission optique d'informations de signalisation et de commande dans des reseaux optiques a multiplexage en longueur d'onde
DE60119174T2 (de) Vorrichtung und verfahren zum multiplexen optischer signale mit im wesentlichen gleicher dispersion
EP1286487A1 (fr) Filtre optique en cascade
EP0973291B1 (fr) Système et méthode d'égalisation de courbe de réponse en fréquence de lignes de transmission à multiplexage de longueurs d'ondes
EP1061685A2 (fr) Verfahren zur Übertragung von Daten über ein optisches WDM-Übertragungssystem, sowie WDM-Übertragungssystem

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): JP US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE

121 Ep: the epo has been informed by wipo that ep was designated in this application
DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
122 Ep: pct application non-entry in european phase