DE2659005A1 - Star connector for fibre-optic cables or diodes - comprises glass coupling cylinder having square refraction profile - Google Patents

Star connector for fibre-optic cables or diodes - comprises glass coupling cylinder having square refraction profile

Info

Publication number
DE2659005A1
DE2659005A1 DE19762659005 DE2659005A DE2659005A1 DE 2659005 A1 DE2659005 A1 DE 2659005A1 DE 19762659005 DE19762659005 DE 19762659005 DE 2659005 A DE2659005 A DE 2659005A DE 2659005 A1 DE2659005 A1 DE 2659005A1
Authority
DE
Germany
Prior art keywords
diodes
cylinder
square
optic cables
fibre
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
DE19762659005
Other languages
German (de)
Other versions
DE2659005C2 (en
Inventor
Michael Dr Ing Kuhn
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.)
Bosch Telecom GmbH
Original Assignee
Licentia Patent Verwaltungs 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 Licentia Patent Verwaltungs GmbH filed Critical Licentia Patent Verwaltungs GmbH
Priority to DE19762659005 priority Critical patent/DE2659005C2/en
Publication of DE2659005A1 publication Critical patent/DE2659005A1/en
Application granted granted Critical
Publication of DE2659005C2 publication Critical patent/DE2659005C2/en
Expired legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/26—Optical coupling means
    • G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
    • G02B6/2804—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals forming multipart couplers without wavelength selective elements, e.g. "T" couplers, star couplers
    • G02B6/2808—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals forming multipart couplers without wavelength selective elements, e.g. "T" couplers, star couplers using a mixing element which evenly distributes an input signal over a number of outputs

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Couplings Of Light Guides (AREA)
  • Optical Integrated Circuits (AREA)

Abstract

Star connector is for fibre optic cables and/or diodes. The fibres or diodes are coupled diagonally to one end face of a glass (quartz) cylinder having the squarest possible refraction profile. The opposite end face of the cylinder is mirrored, and the cylinder length is Zo=m(pi)a/2 square root 8 DELTA where m = 1, 3, 5 ........ a = cylinder radius DELTA = relative refractive index difference n2(r) = n deg. 1-2 DELTA (r/a)2 .

Description

Sternkoppler für Lichtleitfasern und/oder Dioden Star coupler for optical fibers and / or diodes

Die Erfindung hat sich die Aufgabe gestellt, eine einfache Verzweigungseinrichtung aufzuzeigen zur Bildung eines Sternkopplers für Lichtleitfasern und/oder Dioden.The object of the invention is to provide a simple branching device to show the formation of a star coupler for optical fibers and / or diodes.

Erfindungsgemäss wird dies so realisiert, dass die Fasern bzw. Dioden in einen Glas- bzw. Quarzzylinder auf der Stirnseite diagonal eingekoppelt werden. Der Zylinder weist ein möglichst quadratisches Brechzahlprofil auf und ist auf der gegenüberliegenden Stirnseite optisch verspiegelt. Die Länge des Zylinders beträgt dabei wobei m = 1, 3,5 a = Zylinderradius relative Brechzahldifferenz n(r=o) - nsr=a) = nO - n(a) n(r=o) no n²(r) = no[1-2#(r/a)²] bedeuten.According to the invention, this is implemented in such a way that the fibers or diodes are coupled diagonally into a glass or quartz cylinder on the end face. The cylinder has a refractive index profile that is as square as possible and is optically mirrored on the opposite end face. The length of the cylinder is where m = 1, 3.5 a = cylinder radius, relative difference in refractive index n (r = o) - nsr = a) = nO - n (a) n (r = o) no n² (r) = no [1-2 # ( r / a) ²].

Anhand der-Figuren soll dies kurz erläutert werden.This is to be explained briefly on the basis of the figures.

Der in der Fig. 1 dargestellte Quarzzylinder ist auf seiner rückwärtigen Stirnseite 9 und auf seiner Mantelfläche 10 optisch verspiegelt. Auf der vorderen Stirnseite sind längs eines Durchmessers mehrere Lichtleitfasern angekoppelt, die mit 1,2 ... 6,7 bezeichnet sind. Der Durchmesser des Zylinders ist 2a; seine Länge ist mit z bezeichnet. Alle Licht-0 strahlen, die man den Eigenwellen zuordnen kann, haben annähernd die gleiche Strahlperiode 4zo ihres Zick-Zack- oder ellipsenähnlichen Pfades. Nach der vorbestimmten Länge z wird 0 somit jeder Punkt auf der x-Achse nach Reflexion an der verspiegelten Stirnseite des Quarzzylinders wieder gleichmässig auf die Stirnfläche abgebildet, auf welcher die eingangs erwähnten Lichtleitfasern angeordnet sind. Wird ein ankommendes Signal über eine der Lichtleitfasern der vorderen Stirnseite 8 des Uuarzzylinders geführt, so wird dieses nach Durchlaufen des Quarzzylinders und Reflexion an der verspiegelten Rückseite auf die anderen Fasern aufgeteilt, wodurch man einen Sternkoppler erhält, dessen Wirkungsweise in der Fig. 2 schematisch dargestellt ist.The quartz cylinder shown in Fig. 1 is on its rear End face 9 and optically mirrored on its lateral surface 10. On the front Front side several optical fibers are coupled along a diameter, the are denoted by 1.2 ... 6.7. The diameter of the cylinder is 2a; its length is denoted by z. All light-0 rays that can be assigned to the eigenwaves, have approximately the same beam period 4zo as their zigzag or ellipse-like Path. After the predetermined length z, every point on the x-axis becomes 0 evenly again after reflection on the mirrored face of the quartz cylinder shown on the face on which the aforementioned Optical fibers are arranged. Will receive an incoming signal through one of the optical fibers of the front End face 8 of the Uuarzzylinders out, so this is after passing through the quartz cylinder and reflection on the mirrored back is split between the other fibers, whereby a star coupler is obtained, the mode of operation of which is shown schematically in FIG is shown.

Die in der Fig. 1 dargestellten Lichtleitfasern können auch durch entsprechende Dioden ersetzt werden, über welche ein ankommendes Signal eingekoppelt bzw. ein abgehendes Signal ausgekoppelt werden kann.The optical fibers shown in Fig. 1 can also through corresponding diodes are replaced, via which an incoming signal is coupled or an outgoing signal can be decoupled.

Der Zylinderdurchmesser 2a der Anordnung wird so gewählt, dass bei Verbindung einer vorgegebenen Lichtquelle oder numerischen Apertur für das ankommende Signal gerade die erforderliche Anzahl Fasern bzw. Dioden mit dem weiterführenden Signal ausgeleuchtet werden. Der erfindungsgemässe Sternkoppler kann somit auch Verwendung finden für ein vorbestimmtes Aufteilen der ankommenden Lichtenergie.The cylinder diameter 2a of the arrangement is chosen so that at Connection of a given light source or numerical aperture for the incoming one Signal just the required number of fibers or diodes with the continuing Signal are illuminated. The star coupler according to the invention can thus also Find use for a predetermined division of the incoming light energy.

Claims (1)

Patentanspruch Sterllkoppler für Lichtleitfasern und/oder Dioden, dadurch gekennzeichnet, dass die Fasern bzw. Dioden in einen Glas (Quarz)-Zylinder mit möglichst quadratischem Brechzahlprofil diagonal auf der einen Stirnseite eingekoppelt werden1 dass die gegenüberliegende Stirnseite optisch verspiegelt ist und dass die Länge des Zylinders beträgt, wobei m = 1,3,5 ...Patent claim sterile coupler for optical fibers and / or diodes, characterized in that the fibers or diodes are coupled into a glass (quartz) cylinder with a refractive index profile that is as square as possible diagonally on one end face1 that the opposite end face is optically mirrored and that the length of the cylinder where m = 1.3.5 ... a = Zylinderradius A = relative Brechzahldifferenz n2(r) = n°[l~2iN(r)2] bedeuten. a = cylinder radius A = relative difference in refractive index n2 (r) = n ° [l ~ 2iN (r) 2] mean.
DE19762659005 1976-12-27 1976-12-27 Star coupler for optical fibers and / or diodes Expired DE2659005C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19762659005 DE2659005C2 (en) 1976-12-27 1976-12-27 Star coupler for optical fibers and / or diodes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19762659005 DE2659005C2 (en) 1976-12-27 1976-12-27 Star coupler for optical fibers and / or diodes

Publications (2)

Publication Number Publication Date
DE2659005A1 true DE2659005A1 (en) 1978-07-06
DE2659005C2 DE2659005C2 (en) 1982-04-08

Family

ID=5996743

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19762659005 Expired DE2659005C2 (en) 1976-12-27 1976-12-27 Star coupler for optical fibers and / or diodes

Country Status (1)

Country Link
DE (1) DE2659005C2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5742717A (en) * 1995-10-30 1998-04-21 Fuji Electric Co., Ltd. Optical star coupler

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3874781A (en) * 1973-07-05 1975-04-01 Corning Glass Works Coupler for optical communication system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3874781A (en) * 1973-07-05 1975-04-01 Corning Glass Works Coupler for optical communication system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5742717A (en) * 1995-10-30 1998-04-21 Fuji Electric Co., Ltd. Optical star coupler

Also Published As

Publication number Publication date
DE2659005C2 (en) 1982-04-08

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Legal Events

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

Ipc: G02B 5/176

D2 Grant after examination
8327 Change in the person/name/address of the patent owner

Owner name: AEG-TELEFUNKEN NACHRICHTENTECHNIK GMBH, 7150 BACKN

8327 Change in the person/name/address of the patent owner

Owner name: ANT NACHRICHTENTECHNIK GMBH, 7150 BACKNANG, DE

8320 Willingness to grant licences declared (paragraph 23)
8339 Ceased/non-payment of the annual fee