DE3533796A1 - Method for switching optical signals - Google Patents

Method for switching optical signals

Info

Publication number
DE3533796A1
DE3533796A1 DE19853533796 DE3533796A DE3533796A1 DE 3533796 A1 DE3533796 A1 DE 3533796A1 DE 19853533796 DE19853533796 DE 19853533796 DE 3533796 A DE3533796 A DE 3533796A DE 3533796 A1 DE3533796 A1 DE 3533796A1
Authority
DE
Germany
Prior art keywords
optical
optical signals
switching
carrier waves
polarization
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.)
Granted
Application number
DE19853533796
Other languages
German (de)
Other versions
DE3533796C2 (en
Inventor
Herbert Dipl Phys Walter
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.)
Siemens AG
Original Assignee
Siemens AG
Standard Elektrik Lorenz AG
Philips Patentverwaltung 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 Siemens AG, Standard Elektrik Lorenz AG, Philips Patentverwaltung GmbH filed Critical Siemens AG
Priority to DE19853533796 priority Critical patent/DE3533796C2/en
Publication of DE3533796A1 publication Critical patent/DE3533796A1/en
Application granted granted Critical
Publication of DE3533796C2 publication Critical patent/DE3533796C2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0005—Switch and router aspects
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0005—Switch and router aspects
    • H04Q2011/0007—Construction
    • H04Q2011/0035—Construction using miscellaneous components, e.g. circulator, polarisation, acousto/thermo optical

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Optical Communication System (AREA)

Abstract

A method for switching two oppositely directed optical signals per signal path in an optical space-division multiplex switching network built up of polarisation-independent symmetric 2 x 2 switching elements is described. The carrier waves of the two optical signals are polarised in such a manner that the polarisation planes form an angle of preferably 90 DEG with respect to one another. The two carrier waves are separated after the switching by means of known optical elements such as, for example, polarisation filters.

Description

Die Erfindung betrifft ein Verfahren zur Vermittlung zweier optischer Signale pro Signalpfad gemäß dem Oberbe­ griff des Patentanspruches.The invention relates to a method for switching two optical signals per signal path according to the Oberbe handle of the claim.

Bei der Übertragung optischer Signale über die derzeit ver­ wendeten Glasfasertypen bleibt die ursprüngliche Polarisation der Trägerwellen nicht erhalten. Wenn optische Signale auch optisch vermittelt werden sollen - ohne eine Umsetzung in elektrische Signale - dann erfordert dies polarisations­ unabhängige optische Koppel- bzw. Schaltelemente. Solche polarisationsunabhängige Schaltelemente sind zum Beispiel aus Steinberg, Giallorenzi, Priest "Polarizationsinsensitive integrated-optical switches: a new electrode design" APPLIED OPTICS/Vol. 16 Nr. 8/August 1977, S . . . . und Steinberg, Giallorenzi "Design of Integrated Optical Switches for Use in Fiber Data Transmission Systems, IEEE Journal, Vol. QE-13, No. 4, April 1977, S. . . . . bekannt. Diese bekannten polarisa­ tionsunabhängigen 2 × 2-Schaltelemente werden jedoch nur im Simplexbetrieb eingesetzt. Eine Verwendung im Duplexbetrieb ist nicht bekannt.When transmitting optical signals via the currently ver the original polarization remains the carrier waves are not preserved. If optical signals should also be conveyed optically - without implementation into electrical signals - then this requires polarization independent optical coupling or switching elements. Such For example, polarization-independent switching elements from Steinberg, Giallorenzi, Priest "Polarization-sensitive integrated-optical switches: a new electrode design "APPLIED OPTICS / Vol. 16 No. 8 / August 1977, p. . . . and Steinberg, Giallorenzi "Design of Integrated Optical Switches for Use in Fiber Data Transmission Systems, IEEE Journal, Vol. QE-13, No. 4, April 1977, p. . . . known. This well-known polarisa independent 2 × 2 switching elements are only used in simplex operation. Use in duplex mode is not known.

Die der Erfindung zugrunde liegende Aufgabe, aus elektro­ optischen 2 × 2-Schaltelementen aufgebaute optische Raumviel­ fach-Koppelnetze im Duplex-Betrieb mit gegenläufigen opt. Signa­ len zu betreiben, wird durch die im Hauptanspruch gekennzeich­ nete Erfindung gelöst.The object underlying the invention, from electro optical 2 × 2 switching elements constructed optical space multiple coupling networks in duplex mode with opposing opt. Signa to operate len is characterized by the in the main claim nete invention solved.

Eine vorteilhafte Weiterbildung der Erfindung ist im Unter­ anspruch gekennzeichnet. Die mit der Erfindung erzielbaren Vorteile bestehen insbesondere in der gleichzeitigen Nutzung des optischen Raumvielfach-Koppelnetzes in beiden Richtungen. Die Anzahl der 2 × 2-Koppelelemente bei gleicher Vermitt­ lungsleistung sinkt auf die Hälfte gegenüber Simplex-Verkehr.An advantageous development of the invention is in the sub claim marked. The achievable with the invention The main advantages are simultaneous use of the optical space multiple coupling network in both directions. The number of 2 × 2 coupling elements with the same switch performance drops by half compared to simplex traffic.

Die Erfindung wird im folgenden näher beschrieben. The invention is described in more detail below.  

Der Einsatz optischer Wellen als Informationsträger in der Nachrichtentechnik erweitert die Zahl der bisher bei auf Leitern übertragenen elektrischen Signalen möglichen Multiplexarten. Die Erfindung nutzt die Möglich­ keit der linearen Polarisation von optischen Wellen zur Multiplexierung und Demultiplexierung optischer Signale. Zwei Trägerwellen für unterschiedliche optische Signale werden linear polarisiert. Durch Drehung der Polarisations­ ebenen mindestens einer der optischen Wellen relativ zur Pola­ risationsebene der anderen optischen Welle wird eine optische Unterscheidbarkeit der beiden Wellen erreicht. Nachdem die beiden gegenläufigen Wellen das optische Raumvielfach- Koppelnetzwerk durchlaufen haben, werden sie durch an sich bekannte optische Mittel - wie z. B. Polfilter - wieder getrennt. Diese Trennung der beiden gegenläufigen Wellen ist dann am verlustärmsten und ergibt das geringste Übersprechen, wenn die Polarisationsebenen der beiden optischen Wellen einen Winkel von 90° zueinander während der Vermittlung bilden.The use of optical waves as information carriers in Communication technology expands the number of hitherto with electrical signals transmitted on conductors possible multiplex types. The invention makes use of the possibilities linear polarization of optical waves Multiplexing and demultiplexing optical signals. Two carrier waves for different optical signals are linearly polarized. By rotating the polarization planes at least one of the optical waves relative to the pola level of risk of the other optical wave becomes an optical one Distinctness of the two waves achieved. after the the two opposite waves the optical space multiple Coupling network, they are through known optical means - such. B. polarizing filter - again Cut. This separation of the two opposite waves is then the least lossy and gives the least crosstalk, if the polarization planes of the two optical waves are one Form an angle of 90 ° to each other during the mediation.

Claims (2)

1. Verfahren zur Vermittlung zweier optischer Signale pro Signalpfad in einem aus polarisationsunabhängigen bezüglich der Mittellinie zwischen den Ein- und Aus­ gängen symmetrischen 2 × 2-Schaltelementen gebildeten optischen Raumvielfach-Koppelnetz, dadurch ge­ kennzeichnet, daß für die zwei optischen Signale jeweils linear polarisierte Trägerwellen Anwen­ dung finden und daß die Polarisationsebenen der beiden Trägerwellen winklig zueinander stehen.1. A method for switching two optical signals per signal path in an optical space multiple coupling network formed from polarization-independent with respect to the center line between the inputs and outputs symmetrical 2 × 2 switching elements, characterized in that for the two optical signals each linearly polarized carrier waves Find application and that the polarization planes of the two carrier waves are at an angle to each other. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Polarisationsebenen der beiden Trägerwellen zueinander einen Winkel von 90° bilden.2. The method according to claim 1, characterized in that the polarization planes of the two carrier waves to each other form an angle of 90 °.
DE19853533796 1985-09-21 1985-09-21 Process for the transmission of optical signals Expired - Fee Related DE3533796C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19853533796 DE3533796C2 (en) 1985-09-21 1985-09-21 Process for the transmission of optical signals

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19853533796 DE3533796C2 (en) 1985-09-21 1985-09-21 Process for the transmission of optical signals

Publications (2)

Publication Number Publication Date
DE3533796A1 true DE3533796A1 (en) 1987-04-02
DE3533796C2 DE3533796C2 (en) 1993-10-07

Family

ID=6281639

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19853533796 Expired - Fee Related DE3533796C2 (en) 1985-09-21 1985-09-21 Process for the transmission of optical signals

Country Status (1)

Country Link
DE (1) DE3533796C2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3716247A1 (en) * 1987-05-15 1988-11-24 Standard Elektrik Lorenz Ag Optical communication system with wavelength-division and polarization-division multiplex

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2840254A1 (en) * 1977-09-16 1979-03-29 Thomson Csf DEVICE FOR TRANSMISSION OF OPTICAL RADIATIONS

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2840254A1 (en) * 1977-09-16 1979-03-29 Thomson Csf DEVICE FOR TRANSMISSION OF OPTICAL RADIATIONS

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
STEINBERG, R.A., GIALLORENZI, T.G., PRIEST, R.G.: Polarization-insensitive integrated-optical switches: a new electrode design. In: Applied Optics 1977, Vol. 16, Nr. 8, S. 2166-2170 *
STEINBERG, R.A., GIALLORENZI, T.G.: Design of Integrated Optical Switches for Use in Fiber Data Transmission Systems. In: IEEE Journal of Quantum Electronics 1977, Vol. QE 13, Nr. 4, S. 122-128 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3716247A1 (en) * 1987-05-15 1988-11-24 Standard Elektrik Lorenz Ag Optical communication system with wavelength-division and polarization-division multiplex

Also Published As

Publication number Publication date
DE3533796C2 (en) 1993-10-07

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Legal Events

Date Code Title Description
8110 Request for examination paragraph 44
8125 Change of the main classification

Ipc: H04Q 3/00

8127 New person/name/address of the applicant

Owner name: SIEMENS AG, 8000 MUENCHEN, DE PHILIPS PATENTVERWAL

D2 Grant after examination
8364 No opposition during term of opposition
8327 Change in the person/name/address of the patent owner

Owner name: SIEMENS AG, 80333 MUENCHEN, DE PHILIPS CORPORATE I

8339 Ceased/non-payment of the annual fee