EP2260590A1 - Mesure de dispersion relative dans des fibres optiques en cours d'exploitation - Google Patents

Mesure de dispersion relative dans des fibres optiques en cours d'exploitation

Info

Publication number
EP2260590A1
EP2260590A1 EP09716725A EP09716725A EP2260590A1 EP 2260590 A1 EP2260590 A1 EP 2260590A1 EP 09716725 A EP09716725 A EP 09716725A EP 09716725 A EP09716725 A EP 09716725A EP 2260590 A1 EP2260590 A1 EP 2260590A1
Authority
EP
European Patent Office
Prior art keywords
signal
measurement
fiber
measurement signal
data
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.)
Withdrawn
Application number
EP09716725A
Other languages
German (de)
English (en)
Inventor
Peter Meissner
Michael Bousonville
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.)
GSI Helmholtzzentrum fuer Schwerionenforschung GmbH
Original Assignee
GSI Helmholtzzentrum fuer Schwerionenforschung 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 GSI Helmholtzzentrum fuer Schwerionenforschung GmbH filed Critical GSI Helmholtzzentrum fuer Schwerionenforschung GmbH
Publication of EP2260590A1 publication Critical patent/EP2260590A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
    • G01M11/30—Testing of optical devices, constituted by fibre optics or optical waveguides
    • G01M11/31—Testing of optical devices, constituted by fibre optics or optical waveguides with a light emitter and a light receiver being disposed at the same side of a fibre or waveguide end-face, e.g. reflectometers
    • G01M11/3109—Reflectometers detecting the back-scattered light in the time-domain, e.g. OTDR
    • G01M11/3145—Details of the optoelectronics or data analysis
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
    • G01M11/30—Testing of optical devices, constituted by fibre optics or optical waveguides
    • G01M11/31—Testing of optical devices, constituted by fibre optics or optical waveguides with a light emitter and a light receiver being disposed at the same side of a fibre or waveguide end-face, e.g. reflectometers
    • G01M11/3109—Reflectometers detecting the back-scattered light in the time-domain, e.g. OTDR
    • G01M11/3154—Details of the opto-mechanical connection, e.g. connector or repeater
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
    • G01M11/30—Testing of optical devices, constituted by fibre optics or optical waveguides
    • G01M11/31—Testing of optical devices, constituted by fibre optics or optical waveguides with a light emitter and a light receiver being disposed at the same side of a fibre or waveguide end-face, e.g. reflectometers
    • G01M11/3109—Reflectometers detecting the back-scattered light in the time-domain, e.g. OTDR
    • G01M11/3163—Reflectometers detecting the back-scattered light in the time-domain, e.g. OTDR by measuring 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
    • H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
    • H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
    • H04B10/077—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using a supervisory or additional signal
    • H04B10/0775—Performance monitoring and measurement of transmission parameters
    • 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
    • H04B10/25133—Arrangements specific to fibre transmission for the reduction or elimination of distortion or dispersion due to chromatic dispersion including a lumped electrical or optical dispersion compensator

Definitions

  • the present invention relates to a method and a system for improving the transmission of data in an optical transmission system.
  • the particular advantages of optical transmission are the low transmission losses and the insensitivity to electromagnetic interference.
  • the basis for the optical communication are essentially the light-generating transmitter oscillators, for example, internally or externally modulated laser diodes, the glass fiber and the receiver, for example photodiodes, possibly with amplifiers.
  • DWDM Dense Wavelength Division Multiplex
  • DWDM enables simultaneous transmission of many wavelengths of light over a common fiber.
  • several signals are combined or bundled for signal and message transmission and transmitted substantially simultaneously via a line.
  • BESTATIGUNGSKOPIE The maximum route length for data rates of 10 Gbit / s is in the range of about 100 km and is limited, inter alia, by the fiber attenuation. In addition to the fiber attenuation, the dispersion of the water also makes itself, especially over very long transmission distances
  • the temporally extremely short light pulses of a high-rate signal of about 10 GBit / s correspond to a certain spectral width, which leads to a pulse broadening of the temporal signal, in particular even with low dispersion.
  • the present invention has therefore set itself the task of providing a method and a system for transmitting information or data in an optical transmission system, which at least reduce the disadvantages of the prior art described above.
  • Dispersion or a change in the dispersion reliably perform, preferably in existing data transmission systems.
  • the present invention claims a method of transmitting data or information in an optical transmission system from a first location to a second location, comprising at least one light generating transmitter, a transmission link at least one fiber and one receiver, comprising the following method steps:
  • Measuring signal is reflected after passing through a section of the fiber
  • Decoupling the reflected measurement signal from the fiber comparing or processing a coupled transmitted measurement signal and coupled reflected measurement signal and at least determining the dispersion in the fiber from the comparison of coupled measurement signal and coupled reflected measurement signal.
  • the method is characterized by compensating for the change in the data signal, which occurred at least on account of the dispersion in the fiber, taking into account the comparison or the processing in such a way that the data contained in the data signal is usable.
  • Data transmission system which has at least one light-emitting transmitter, a transmission path with at least one fiber and a receiver, to Compensation of the dispersion comprising the following
  • a coupling device for coupling the reflected measuring signal out of the fiber
  • a receiving device for receiving the decoupled reflected measuring signal
  • Measuring signal and / or for determining the dispersion Measuring signal and / or for determining the dispersion.
  • the system is characterized by means or means for compensating for the change in the data signal which has occurred, at least due to the dispersion in the fiber, taking into account the comparison such that those in the
  • Data signal contained data are usable.
  • the system is in particular designed for carrying out the method according to the invention.
  • the method is preferably designed for execution by means of the system according to the invention.
  • the dispersion occurring in the transmission path of the data signal is determined.
  • the goal of Dispersion compensation is to compensate for the signal distortion occurring by path dispersion in the transmission path at the receiver so that the transmitted data processed in sufficient quality, preferably also received, can be.
  • Character of the system it is possible to supplement or integrate the present system, for example as a kind of kit in already existing optical data transmission systems. With the present invention, so to speak, a kind of fine tuning of the transmission path is possible. In this case, even predominantly standard components, which are essentially only optical components, can be used.
  • the data and the data signal are hereinafter also referred to as information or information signal.
  • the data signal is used to transmit the information or data.
  • the data signal can in this case have only one signal of one wavelength.
  • the data signal consists of several WDM signals.
  • the data signal in this case comprises a plurality of signals of different optical wavelengths, which are combined.
  • the wavelengths are preferably in the communication wavelengths in the known C-band or L-band.
  • the data signal contains the information to be transmitted.
  • a useable data signal is understood to mean a signal from which the information which is to be transmitted, preferably substantially completely, can be extracted after the transmission.
  • the measurement signal can be applied continuously or configured as a pulse. It is preferably a signal which does not or substantially not have the function of transmitting information. It serves exclusively or substantially the measurement or characterization of the optical fiber or fiber bundle.
  • the optical wavelength of the measurement signal differs from the optical wavelengths of the information signal in that it can be separated from the information signal accordingly.
  • the minimum distance to the wavelengths of the information signal is about 1.6 nm.
  • the measuring signal is provided only with an optical wavelength, preferably a direct
  • the measurement signal is provided with at least two different wavelengths. This is particularly advantageous if the fiber is measured for the first time. Therefore, in one embodiment, the means for providing the measurement signal is designed to provide at least two different optical wavelengths.
  • the means for providing the measurement signal comprises a laser.
  • the measurement signal is provided at a modulation frequency fMe ss .
  • the modulation can already be done internally in a laser. If the measurement signal, such as by a CW laser, is provided substantially constant in amplitude and frequency, or if it is to be further modulated, then the means for providing the
  • Measuring signal a preferably frequency-variable modulator.
  • the initial modulation frequency f meas of the measurement signal is adapted to the length of the fiber.
  • the initial frequency describes the frequency with which a first "rough" measurement of the transit time first takes place.
  • the initial modulation frequency fM ess is adapted to the boundary condition of l / f M ess greater than approximately twice the duration of the measurement signal.
  • Measuring signal is increased to improve the accuracy or the resolution, preferably in discrete steps.
  • the modulation frequency of the measurement signal is then kept substantially constant.
  • the generated measurement signal is divided by a divider for splitting the measurement signal into at least two components before being coupled into the fiber, and a first component is coupled into the fiber and a second component is provided for comparing the coupled component with the reflected component.
  • the coupling device for coupling or connecting the measurement signal into the fiber in one embodiment comprises a multiplexer.
  • the injected signal is then passed over the portion of the line to be measured or monitored. At the end of this section, the measurement signal is then reflected at the reflector.
  • the measuring signal can be reflected substantially completely or only partially.
  • the reflector is a fiber Bragg grating or the reflector comprises a fiber Bragg grating.
  • the measuring signal then runs back, preferably essentially the entire transmission path, and is decoupled from the line again by means of the coupling device for decoupling the measuring signal.
  • the coupling device for coupling out the measurement signal comprises a Demultiplexer or the coupling device for decoupling the measurement signal is a demultiplexer.
  • the coupling device for coupling the measurement signal and the coupling device for coupling out the measurement signal are arranged in a component or are provided by a component.
  • the coupling device for coupling the measurement signal and the coupling device for decoupling the measurement signal is an ADD / DROP multiplexer.
  • the provided measurement signal and the decoupled measurement signal via a switch, which is designed in particular as a circulator, the input device or the receiving device.
  • the receiving device or the receiver is designed to receive the reflected measuring signal. But it can also be means for comparing the coupled
  • these means for comparing can also be arranged in another component.
  • the means for comparing can be designed to compare the phase of the coupled measurement signal with the phase of the coupled-out measurement signal and / or for determining the transit time.
  • the receiving device is designed to determine the transit time.
  • the receiving device is assigned to a network analyzer.
  • the receiving device may also be part of a measuring device, which in an embodiment also includes a network analyzer.
  • the functions generating the measurement signal and / or dividing the measurement signal and / or transmitting the measurement signal and / or providing the measurement signal and / or receiving the measurement signal and / or comparing and / or determining the transit time and / or the dispersion can by a measuring device or a Network analyzer can be provided.
  • the dispersion is by means of the different
  • the phase of the coupled measuring signal is compared with the phase of the decoupled measuring signal for determining the transit time or the dispersion.
  • the comparison may also be a simple use of the transmitted signal as a start signal for a time measurement and the reflected signal as a stop.
  • the signal distortion occurring due to path dispersion or a changed dispersion should be compensated in such a way that the transmitted data can be received and / or processed in sufficient quality.
  • the information signal is adapted or conditioned prior to receipt by the receiving device, preferably prior to coupling into the fiber or forwarding in the fiber of the optical transmission system, such that a change in the transmission due to the transmission
  • the signal can be processed directly and / or by a corresponding preparation of the transmission path be adjusted.
  • a dispersion compensation module with a corresponding opposite dispersion preferably a so-called compensation fiber, is introduced in the optical path.
  • a portion of the fiber may also be appropriately stretched or compressed and / or thermally treated to prepare the transfer line.
  • the information signal is adapted or regenerated after the transmission via the fiber, so that a change in the information signal which has occurred due to the transmission is substantially compensated.
  • a regeneration can be understood as a re-amplification and / or re-shaping and / or re-timing.
  • the means for compensating in the beam direction after the coupling device for coupling and / or after the coupling device for decoupling is arranged.
  • the method according to the invention in particular the measurement of the fibers or the determination of the dispersion, quasi-continuously or continuously carried out, so that a substantially permanent or continuous monitoring of the transmission system is possible.
  • an optical data transmission system with at least one of the above-described systems is also within the scope of the present invention.
  • the signals carrying the information or data are amplified, at least because of the attenuation of the signal, after a certain distance.
  • This processing or amplification of the signals is generally carried out in so-called transmission stations.
  • the optical data transmission system is characterized in that at least one system according to the present invention is located or incorporated in one or substantially each transmission station.
  • Figure 1 illustrates schematically the use of the present invention in a fiber of a fiber bundle.
  • Figure 2 shows schematically the measurement of the dispersion in several fibers of a fiber bundle.
  • FIG. 3 schematically illustrates the phase measurement.
  • Figure 1 illustrates schematically the use of the present invention in a fiber (1) of a
  • the WDM signals ( ⁇ i, ..., ⁇ N ) are optically amplified approximately every 80 to 100 km in a transmission station 3, 4, 5.
  • a Transmission station 3, 4, 5 is used to prepare the signals ( ⁇ i, ..., ⁇ N ).
  • the processing of a signal ( ⁇ i,..., ⁇ N ) can be understood to mean amplification and / or shaping and / or temporal adaptation, a so-called "timing".
  • Timing a signal
  • Transfer stations (# n-1) 3, (# n) 4 and (# n + 1) 5 are shown.
  • the individual transmission stations 3, 4, 5 are constructed similarly or identically.
  • the construction of the transfer station (# n) 4 is shown in a detail view with initially only one fiber 1, in which a system according to the present invention is installed.
  • the individual transmission stations 3, 4, 5 are connected to each other at least by means of the optical fiber 1. Via these the data or the information signal ( ⁇ i, ..., ⁇ N ) or the information signals ( ⁇ i, ..., ⁇ N ) are transmitted.
  • An information signal ( ⁇ i, ..., ⁇ N ) may be provided by a plurality of wavelengths of light transmitted through a common optical fiber 1, preferably substantially simultaneously.
  • the station (# n) 4 also inputs from the station (# n-1) 3 in addition to the information signal ( ⁇ i, ..., ⁇ N )
  • Measurement signal ⁇ MeS s transmitted.
  • the measurement signal ( ⁇ MeSs ) has a different wavelength than that
  • the measurement signal ( ⁇ Mes s) is reflected at the wavelength-selective reflector 6, which is assigned to the station (# n) 4, and runs back to the station (# n-1) 3.
  • the function and the processing of the measurement signal ( ⁇ Mess ) is illustrated by the station (#n 4).
  • the wavelength-selective reflector 6 is preferably designed as a fiber Bragg grating 6.
  • the measurement signal ( ⁇ Mes s) is reflected at the reflector 6. However, the reflector 6 is transparent to the wavelengths of the information signal ( ⁇ i, ..., ⁇ N ). These are then amplified in an amplifier 7.
  • the amplifier 7 is exemplified as EDFA 7 ("erbium doped fiber amplifier").
  • a device 8 for coupling and decoupling at least one measurement signal ( ⁇ Mess ) is arranged.
  • the device 8 is preferably designed as an ADD / DROP multiplexer 8.
  • a multiplex signal such as the information signal ( ⁇ i, ..., ⁇ N )
  • both a sub-signal or a plurality of sub-signals, such as the measuring signal ( ⁇ MeSs ) are added (add) and also taken from the multiplex signal partial signals (drop) .
  • the received multiplexed signal may be retransmitted substantially unchanged except for these ADD / DROP changes.
  • the information signal ( ⁇ i, ..., ⁇ N ) becomes the measurement signal
  • the measurement signal ( ⁇ MeSs ) is the device 8 via a switch 9, preferably designed as a circulator 9, respectively.
  • the information signal ( ⁇ i, ..., ⁇ N ) and the measurement signal ( ⁇ Mes s) are transmitted in common to the station (# n + 1) 5 via the optical fiber 1.
  • the measurement signal ( ⁇ MeSs ) is reflected at the reflector 6, which is assigned to the station (# n + 1) 5, preferably designed as a fiber Bragg grating 6, and runs back to the station (# n) 4.
  • the measurement signal ( ⁇ MeSs ) again from the Line 1, here the fiber 1, decoupled.
  • the reflected measurement signal ( ⁇ Me ss) carries or the transmitted measurement signal ( ⁇ MeS s) in conjunction with the reflected measurement signal ( ⁇ Me ss) carry the information about the duration and thus the length of the fiber 1 and the dispersion or a
  • the information is determined in a measuring unit 10.
  • the measuring signal ( ⁇ MeSs ) is fed to the measuring unit 10 via the switch 9.
  • the information about a phase comparison between transmitted and reflected
  • the measuring unit 10 and the determination of the information as well as the generation and guidance of the measuring signal ( ⁇ Me ss), the component Tx 11 and the component Rx 12 as well as the phase measurement 13 will be presented with reference to the following description of FIG.
  • the information about the dispersion or the result from the comparison between the coupled-in and the coupled-out measurement signal ( ⁇ MeSs ) is used to determine a change in the information signal due to the dispersion or a changed dispersion in the fiber
  • the sender is here for example the station (# n) 4.
  • the receiver is the station (# n + 1) 5.
  • the compensation can be reversed in a kind of way
  • the means 14 for compensating may be arranged in the forward variant, for example, between the device 8 for coupling and decoupling and in front of the station (# n + 1) 5. This is the
  • the means 14 may be formed here, for example, to form the information signals ( ⁇ i, ..., ⁇ N ), in particular to stretch and / or compress.
  • the fine tuning of the dispersion compensation can be done eg with delay line filters and special fiber
  • Bragg gratings are made whose dispersion is adjustable.
  • the compensating means 14 can be arranged, for example, in the station (# n + 1) 5, preferably in accordance with the reflector 6 associated with the station (# n + 1) 5.
  • the information signal ( ⁇ i, ..., ⁇ N ) after being guided on the optical line 1 is reconstructed or regenerated between the station (# n) 4 and the station (# n + 1) 5.
  • the means 14 can be designed here, for example, in order to amplify and / or shape the information signals ( ⁇ i, ..., ⁇ N ), in particular to stretch and / or compress them. In both variants, the processing or the
  • the system outlined above preferably also for permanent or quasi-continuous dispersion measurement, can make a decisive contribution to the realization of optical transmission systems with data rates of> 40 Gbit / s.
  • Such systems with 40 and 100 Gbit / s are currently in the testing.
  • FIG. 2 schematically shows the measurement of the dispersion in a plurality of fibers 1 of a fiber bundle 2.
  • the basic construction essentially corresponds to the construction shown in FIG.
  • the switch 9 is not shown for reasons of clarity.
  • the measurement signal ( ⁇ Me ss) or the measurement signals ( ⁇ Me ssi) and ( ⁇ meSs 2) of the fiber 1 and the fibers 1, respectively become an optical signal Switch 15 is supplied.
  • the fibers 1 are measured one at a time. If the measuring unit 10 is formed with corresponding features, several or even all the fibers 1 can be measured in parallel or simultaneously. There are two measurements of the group delay, preferably successively, at different wavelengths of
  • the two different wavelengths can also be supplied together. From this, the dispersion, preferably in ps / nm, of fiber 1, since the dispersion waveform is substantially known, can be directly calculated. If the measuring device 10 is designed accordingly, a measurement in several fibers 1 can be carried out in parallel. If two or more wavelengths have to be coupled in and / or out as well as also reflected, the device 8 and the reflector 6 have a larger bandwidth.
  • the present invention is capable of measuring the dispersion continuously or quasi-continuously, a basic problem of 100 Gbit / s transmission can be overcome.
  • the wavelength ( ⁇ Me s s) to which the measurement frequency f measurement is modulated is tunable, or may be, and thus two propagation time measurements at different wavelengths ( ⁇ Me ssi) ( ⁇ Me ss2) with a certain wavelength offset are possible.
  • the difference between the measured transit times in relation to Wavelength offset represents the dispersion of the transmission path.
  • FIG. 3 schematically illustrates the phase measurement and represents a detail from FIG
  • Light wavelength of the measurement signal ⁇ Me ss is first provided by a laser, which is not shown in the figure. If the light is not already internally modulated by the laser with a modulation frequency f MeSs , it is modulated by a downstream modulator, which is also not shown, with a modulation frequency fM ess .
  • the modulation frequency fMess is adapted to the length of the fiber 1 or the transmission path 1. With a length of a fiber 1 of about 100 km, the initial modulation frequency f meas is in a range of about 1 kHz.
  • the initial modulation frequency f Messr is preferably increased in discrete steps, in particular up to one
  • Modulation frequency fMess in a range from about 100 kHz to 6 GHz. Higher modulation frequencies are also possible for MeSs , which increases the accuracy of the measurement.
  • the measurement signal ( ⁇ MeSs ) is divided and fed to the one via the switch 9 of the coupling device 8 and fed to the other of the device 13 for measuring the phase.
  • the supply line to the switch 9 is illustrated by the illustrated device 11 for transmission Tx or transmitting device 11.
  • a treatment or adaptation, such as a gain the measurement signal
  • the reflected signal ( ⁇ MeS s) take place.
  • the reflected signal ( ⁇ MesS ) is supplied to the receiving unit Rx 12 after decoupling via the switch 9. There, for example, a processing or adaptation, such as a gain, of the reflected measurement signal ( ⁇ measurement ) take place.
  • the reflected measurement signal ( ⁇ measurement ) is also supplied to the means 13 for measuring the phase.
  • the measurement of the phase can be done, for example, via a comparison between transmitted and reflected signal by means of a phase comparator. Over the term can be inferred again on the dispersion of the fiber 1.
  • the above-mentioned components are preferably part of the measuring unit 10.
  • An exemplary embodiment for a component of the measuring unit 10 or the device 13 is a so-called network analyzer 10.

Landscapes

  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Optics & Photonics (AREA)
  • Analytical Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Dispersion Chemistry (AREA)
  • Optical Communication System (AREA)

Abstract

L'invention concerne un procédé et un système de transmission de données dans un système de transmission optique. Un signal de mesure est généré sur une longueur d'onde qui diffère des longueurs d'onde d'un signal de données contenant les données à transmettre. Le signal de mesure est injecté dans le système de transmission optique, réfléchi après avoir été acheminé sur le trajet de transmission, puis extrait. On compare ensuite le signal de mesure injecté et le signal de mesure réfléchi extrait. D'après le résultat de cette comparaison, une compensation est appliquée à la modification du signal de données qui résulte de la dispersion dans la fibre, de manière à pouvoir utiliser les données contenues dans le signal de données.
EP09716725A 2008-03-06 2009-03-04 Mesure de dispersion relative dans des fibres optiques en cours d'exploitation Withdrawn EP2260590A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008012982A DE102008012982A1 (de) 2008-03-06 2008-03-06 Dispersionsmessung von optischen Fasern im laufenden Betrieb
PCT/EP2009/001522 WO2009109365A1 (fr) 2008-03-06 2009-03-04 Mesure de dispersion relative dans des fibres optiques en cours d'exploitation

Publications (1)

Publication Number Publication Date
EP2260590A1 true EP2260590A1 (fr) 2010-12-15

Family

ID=40612804

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09716725A Withdrawn EP2260590A1 (fr) 2008-03-06 2009-03-04 Mesure de dispersion relative dans des fibres optiques en cours d'exploitation

Country Status (4)

Country Link
US (1) US8498536B2 (fr)
EP (1) EP2260590A1 (fr)
DE (1) DE102008012982A1 (fr)
WO (1) WO2009109365A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9584217B2 (en) * 2012-05-16 2017-02-28 Telefonaktiebolaget Lm Ericsson (Publ) Determining properties of an optical communications path in an optical communications network
DE102013021488A1 (de) * 2013-12-13 2015-06-18 Friedrich-Schiller-Universität Jena Verfahren und Vorrichtung zur Bestimmung der Dispersion eines Objektes
US9503181B2 (en) * 2015-01-06 2016-11-22 Ii-Vi Incorporated Rare earth-doped fiber amplifier with integral optical metrology functionality
CN116208247B (zh) * 2023-05-05 2023-07-25 泰坦(天津)能源技术有限公司 一种井下光纤无线传输的信号处理方法及系统

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2460582A1 (fr) * 1979-06-29 1981-01-23 Thomson Csf Hydrophone a fibre optique monomode fonctionnant par effet elasto-optique
JP3957136B2 (ja) * 2001-10-16 2007-08-15 富士通株式会社 波長分散量の測定方法及び光伝送システム
US7426038B2 (en) * 2003-08-12 2008-09-16 Fujikura Ltd. Detection device, optical path length measurement device, measurement instrument, optical member evaluation method, and temperature change detection method

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2009109365A1 *

Also Published As

Publication number Publication date
US8498536B2 (en) 2013-07-30
WO2009109365A1 (fr) 2009-09-11
DE102008012982A1 (de) 2009-09-17
WO2009109365A8 (fr) 2010-01-21
US20110158655A1 (en) 2011-06-30

Similar Documents

Publication Publication Date Title
DE69736856T2 (de) Überwachung von nichtlinearen Effekten in einem optischen Übertragungssystem
DE69735705T2 (de) Ferngepumptes Lichtübertragungssystem mit Mehrfachwellenlängen
DE60031813T2 (de) Optische Verstärkungsvorrichtung und Verfahren zum Verstärken eines wellenlängen breitbandigen Lichts
EP1796295B1 (fr) Procédé destiné à la détection et à la localisation de perturbations sur un trajet de transmission optique et un système de transmission optique
DE69736560T2 (de) Überwachungssystem unter verwendung eines optischen rückhörsignals als testsignal
DE60206683T2 (de) Optische Verstärker in einem bidirektionellen wellenlängenmultiplexierten System
EP1182810B1 (fr) Méthode de contrôle et liaison de transmission d'un signal optique comprenant un dispositif de compensation des variations dans l'échange de puissance entre canaux WDM induit par l'effet SRS
EP0505829B1 (fr) Système de transmission de signal optique, particulièrement système de transmission de télévision par câble, avec dispositif pour la surveillance et les canaux de service
DE19917751A1 (de) Verfahren und Überwachungsvorrichtung zur Überwachung der Qualität der Datenübertragung über analoge Leitungen
DE69833913T2 (de) Unterdrückung des kohärenten Rayleighrauschens in bidirektionalen Übertragungssystemen
EP0721708B1 (fr) Procede de transmission optique de messages et repeteurs intermediaires utilises a cet effet
DE69823609T2 (de) Überwachung der optischen Signalleistung mit einem Signaturbitmuster in WDM Systemen
WO2009109365A1 (fr) Mesure de dispersion relative dans des fibres optiques en cours d'exploitation
EP0524390A2 (fr) Transmission de données bidirectionnelle sur fibre optique
WO2000003504A1 (fr) Procede et dispositif pour effectuer des mesures de controle et de surveillance sur des lignes de transmission optique
DE60034099T2 (de) Vorrichtung zur Kompensation von Polarisationsmodendispersion in einem optischen Übertragungssystem
WO2000001097A1 (fr) Procede et dispositif pour la transmission optique de donnees par l'intermediaire de guides d'ondes lumineuses
EP1271811B1 (fr) Méthode et dispositif d'amplification de signaux WDM utilisant le processus Brillouin stimulé
EP1224754B1 (fr) Procede et dispositif destines a la surveillance continue d'une liaison de transmission optique
DE69737505T2 (de) Verfahren und Vorrichtung zur Sättigung einer optischen Verstärkungskette, um die Übersteuerung eines wellenlängenmultiplexierten Signals zu verhindern
DE3713340A1 (de) Verfahren zur optischen nachrichtenuebertragung
DE4333367A1 (de) Sender und Empfänger für ein optisches Nachrichtenübertragungssystem
EP1063793A2 (fr) Méthode de mésure de la qualité de signal d'un signal de données optique
WO2003005620A2 (fr) Procede et dispositif de determination et de separation d'effets de canaux individuels lors du transfert optique d'un signal de multiplexage par repartition en longueur d'onde (wdm)
WO2004017542A1 (fr) Systeme pour transmettre des signaux optiques a differents debits

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20100923

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA RS

DAX Request for extension of the european patent (deleted)
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20121002