WO2001027674A2 - Dispositif de surveillance optique - Google Patents

Dispositif de surveillance optique Download PDF

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Publication number
WO2001027674A2
WO2001027674A2 PCT/DE2000/003619 DE0003619W WO0127674A2 WO 2001027674 A2 WO2001027674 A2 WO 2001027674A2 DE 0003619 W DE0003619 W DE 0003619W WO 0127674 A2 WO0127674 A2 WO 0127674A2
Authority
WO
WIPO (PCT)
Prior art keywords
demultiplexer
splitter
multiplexer
module
signal
Prior art date
Application number
PCT/DE2000/003619
Other languages
German (de)
English (en)
Other versions
WO2001027674A3 (fr
Inventor
Bernhard Deutsch
Original Assignee
Scc Special Communication Cables Gmbh & Co. Kg
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 Scc Special Communication Cables Gmbh & Co. Kg filed Critical Scc Special Communication Cables Gmbh & Co. Kg
Publication of WO2001027674A2 publication Critical patent/WO2001027674A2/fr
Publication of WO2001027674A3 publication Critical patent/WO2001027674A3/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/24—Testing correct operation
    • 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
    • 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
    • H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
    • H04B10/0795—Performance monitoring; Measurement of transmission parameters
    • H04B10/07955—Monitoring or measuring power
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems

Definitions

  • the invention relates to an optical monitoring device with an optical multiplexer / demultiplexer and at least one optical splitter (splitter, divider) for checking an input or output signal of the multiplexer / demultiplexer.
  • WDM Wavelength Division Multiplexing
  • WDM Wavelength Division Multiplexing
  • the different wavelengths of optical transmission channels are summarized or divided (see for example LASER FOCUS WORLD, June 1998; pp. 83-88). This means that several channels can be transmitted simultaneously via a single optical fiber.
  • the channels To monitor the function of the multiplexers / demultiplexers in a network, the channels must be tapped optically by means of a splitter / splitter and fed to a detector via a monitor output.
  • both the multiplexer / demultiplexer and the splitter are discrete components that have to be individually installed and connected one after the other.
  • the object of the invention is to provide a monitoring device with which the channels defined by an optical multiplexer / demultiplexer can be checked in a simple manner.
  • a device of the type mentioned at the outset is characterized in that the multiplexer / demultiplexer and the splitter are integrated in one module. Since the module is in a prefabricated form, the assembly time on the part of the user is reduced and the susceptibility to errors of the module is reduced. The fulfillment of the relevant requirements, for example the Bellcore GR-1221-CORE, can already be fulfilled and guaranteed by the manufacturer.
  • An advantageous embodiment of the invention is characterized in that the connections between the multiplexer / demultiplexer and the splitters are thermal splices, as a result of which permanent connections which are satisfactory in their transfer function are established between the multiplexer / demultiplexer and the splitters.
  • LWL planar optical fiber component
  • a further advantageous embodiment of the invention is characterized in that the multiplexers / demultiplexers and the splitters are integrated in one housing. It is therefore possible without further ado to accommodate the module or the housing in a slot in a control cabinet of the transmission system, which further reduces the module's susceptibility to errors.
  • a further advantageous embodiment of the invention is characterized in that for each channel of the multiple xers / De ultiplexers a splitter is provided so that a separate monitoring option can be provided separately for each channel.
  • a further advantageous embodiment of the invention is characterized in that a splitter is provided in the incoming or outgoing transmission link for monitoring the overall function, so that the overall function of the multiplexer / demultiplexer and the transmission link can advantageously be continuously monitored.
  • a further advantageous embodiment of the invention is characterized in that an unused optical gate of a splitter is optically terminated with a return loss of greater than 30 dB, which ensures that the part of the signal transmitted on the splitter is fully used as a monitor signal is available.
  • optical channel output lines are fiber optic pigtails, for which a number of processing methods known per se can be used for connecting or assembling this output line.
  • a further advantageous embodiment of the invention is characterized in that the input / output lines of the module or the fiber optic pigtails have standard interfaces in the form of fiber optic connectors with standard plug faces, for example SC, E 2000 and the like, wherein the outputs of the module are contacted in an advantageous manner by standard connectors and can thus be easily and securely integrated into the network of the transmission system.
  • a further advantageous embodiment of the invention is characterized in that the division ratio of the splitters is between 1 to 99 and 10 to 90, the energy transmitted in the relevant channels or the corresponding signals being reduced only insignificantly by branching off monitor or monitoring signals ,
  • a further advantageous embodiment of the invention is characterized in that the wavelength range of the splitters is broadband in the range from 1530 to 1565 nm (C-band) or in the range from 1565 to 1625 nm (L-band), so that the operating wavelength range of the multiplexers / Demultiplexers can advantageously be covered by the splitters without impairment.
  • a further advantageous embodiment of the invention is characterized in that the housing for the module has on one side signal outputs in the case of a de ultiplexer, signal inputs in the case of a multiplexer and a signal input in the case of a demultiplexer or a signal output in the case of a multiplexer, and that monitor outputs are arranged on the other side of the housing, although the monitor outputs and the signal inputs and
  • Signal outputs can be arranged on the same side of the housing, it is advantageous to arrange the monitor outputs on one side and the signal inputs or signal outputs on the other side of the housing, because this enables the functions of the outputs when integrating the module into transmission systems can differentiate better.
  • Figure 1 is a schematic representation of a module with a demultiplexer and splitters
  • FIG. 2 is a schematic representation of a module with splitters and a multiplexer
  • FIG. 3 shows a schematic representation of a module with a demultiplexer, a splitter in the incoming transmission link and individual splitters in the outgoing transmission links;
  • Figure 4 shows a housing in which the multiplexer / demultiplexer and the splitter are housed.
  • FIG. 1 shows a schematic representation of a module with an optical demultiplexer DM and optical splitters Si to S n in the respective output lines Aj to A n of the de-diplexer DM.
  • An input signal arriving at an input line E with the wavelengths ⁇ l, 2,. .., n is split in the demultiplexer DM into n output signals SAi to SA n with the wavelengths ⁇ l to ⁇ n.
  • the output signal with the wavelength ⁇ l on the output line i is split in the splitter Si into a signal output SA ⁇ and a monitor output MAx.
  • the division ratio is 10 to 90, i.e. the percentage of the power at the monitor output MA ⁇ is 10% of the output power at the signal output SAi.
  • the unused optical gate Ti of the splitter Si is closed with a return loss of greater than 30 dB. The same applies to the splitters S 2 to S n , as shown in Figure 1.
  • FIG. 2 schematically shows a module with a multiplexer M and splitters S 1 to S n in the input lines El to En of the multiplexer M.
  • the splitters Si to S n thus monitor the signals that arrive on the input lines Ei to E n of the multiplexer M. , and the monitor signals are present at the monitor outputs MA X to MA n .
  • the signal output SA is present at the output A of the multiplexer M.
  • the ballast and The function of the splitter in this example is analogous to the example in FIG. 1.
  • FIG. 3 shows the schematic representation of a module as shown in FIG. 1, a further splitter S M being provided in the input line E, which monitors the overall function of the module.
  • FIG. 4 shows a housing B in which a module of the type shown in FIGS. 1 to 3 is arranged.
  • the signal outputs Ai to A 4 if the housing B contains a demultiplexer, or the signal inputs Ei to E if the housing B contains a multiplexer, and a signal input E if the housing contains a demultiplexer, or a signal output A if the housing contains a multiplexer are shown on the right side of the housing B.
  • the monitor outputs MAi to MA 4 are arranged on the left side of the housing B. This applies to the case of four channels.
  • connectors can also be provided for the pigtails or on the housing B.

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  • 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 dispositif de surveillance qui comprend notamment un démultiplexeur (DM) présentant n sorties (Al-An), un répartiteur (S1-Sn) étant affecté à chacune des sorties (Al-An) définissant une voie de transmission. Au niveau de la première sortie (SA1-SAn) de chaque répartiteur (S1-Sn), on a le signal transmis par la voie correspondante ; au niveau de la deuxième sortie (MA1-MAn) du répartiteur (S1-Sn), on a le signal de surveillance associé au signal de voie et amené à un détecteur. Le démultiplexeur (DM) et les répartiteurs (S1-Sn) raccordés par des épissures aux sorties (Al-An) du démultiplexeur sont logés dans un boîtier équipé de connecteurs pour fibres optiques normalisés.
PCT/DE2000/003619 1999-10-15 2000-10-13 Dispositif de surveillance optique WO2001027674A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19949845.8 1999-10-15
DE1999149845 DE19949845A1 (de) 1999-10-15 1999-10-15 Optische Überwachungseinrichtung

Publications (2)

Publication Number Publication Date
WO2001027674A2 true WO2001027674A2 (fr) 2001-04-19
WO2001027674A3 WO2001027674A3 (fr) 2001-12-06

Family

ID=7925822

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2000/003619 WO2001027674A2 (fr) 1999-10-15 2000-10-13 Dispositif de surveillance optique

Country Status (2)

Country Link
DE (1) DE19949845A1 (fr)
WO (1) WO2001027674A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114545562A (zh) * 2022-03-25 2022-05-27 阿里巴巴（中国）有限公司 光纤连接盒、数据处理方法、计算机存储介质

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0546707A2 (fr) * 1991-12-12 1993-06-16 AT&T Corp. Réseau de communication optique passif
EP0684492A1 (fr) * 1994-05-23 1995-11-29 Kyocera Corporation Coupleur optique
US5555330A (en) * 1994-12-21 1996-09-10 E-Tek Dynamics, Inc. Wavelength division multiplexed coupler with low crosstalk between channels and integrated coupler/isolator device
EP0844752A2 (fr) * 1996-11-25 1998-05-27 Nec Corporation Système de transmission optique à compensation automatique de dispersion
US5774245A (en) * 1996-07-08 1998-06-30 Worldcom Network Services, Inc. Optical cross-connect module
EP0910184A2 (fr) * 1997-10-17 1999-04-21 Fujitsu Limited Amplificateur optique et système de communication optique utilisant l'amplificateur optique
EP1073227A2 (fr) * 1999-07-27 2001-01-31 NEC Corporation Transmetteur et multiplexeur d'ondes

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0546707A2 (fr) * 1991-12-12 1993-06-16 AT&T Corp. Réseau de communication optique passif
EP0684492A1 (fr) * 1994-05-23 1995-11-29 Kyocera Corporation Coupleur optique
US5555330A (en) * 1994-12-21 1996-09-10 E-Tek Dynamics, Inc. Wavelength division multiplexed coupler with low crosstalk between channels and integrated coupler/isolator device
US5774245A (en) * 1996-07-08 1998-06-30 Worldcom Network Services, Inc. Optical cross-connect module
EP0844752A2 (fr) * 1996-11-25 1998-05-27 Nec Corporation Système de transmission optique à compensation automatique de dispersion
EP0910184A2 (fr) * 1997-10-17 1999-04-21 Fujitsu Limited Amplificateur optique et système de communication optique utilisant l'amplificateur optique
EP1073227A2 (fr) * 1999-07-27 2001-01-31 NEC Corporation Transmetteur et multiplexeur d'ondes

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
JUNICHI YOSHIDA ET AL: "OPTOELECTRONIC AND PHOTONIC INTEGRATED DEVICES FOR OPTICAL MODULES IN FIBER OPTIC SUBSCRIBER SYSTEMS" PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON COMMUNICATIONS,US,NEW YORK, IEEE, Bd. -, 14. Juni 1992 (1992-06-14), Seiten 1784-1788, XP000337995 ISBN: 0-7803-0599-X *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114545562A (zh) * 2022-03-25 2022-05-27 阿里巴巴（中国）有限公司 光纤连接盒、数据处理方法、计算机存储介质
CN114545562B (zh) * 2022-03-25 2023-12-26 阿里巴巴（中国）有限公司 光纤连接盒、数据处理方法、计算机存储介质

Also Published As

Publication number Publication date
DE19949845A1 (de) 2001-04-19
WO2001027674A3 (fr) 2001-12-06

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