DE3938386A1 - Optical waveguide with low attenuation - provided by barrier layer between cladding tube and optically active region - Google Patents

Optical waveguide with low attenuation - provided by barrier layer between cladding tube and optically active region

Info

Publication number
DE3938386A1
DE3938386A1 DE19893938386 DE3938386A DE3938386A1 DE 3938386 A1 DE3938386 A1 DE 3938386A1 DE 19893938386 DE19893938386 DE 19893938386 DE 3938386 A DE3938386 A DE 3938386A DE 3938386 A1 DE3938386 A1 DE 3938386A1
Authority
DE
Germany
Prior art keywords
optical waveguide
characterized
waveguide according
cladding tube
provided
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Withdrawn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
DE19893938386
Other languages
German (de)
Inventor
Ronald G Dr Sommer
Hans-Detlef Dr Leppert
Gerhard Dr Hahn
Frank Dr Lisse
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.)
Kabel Rheydt AG
Original Assignee
AEG Kabel AG
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 AEG Kabel AG filed Critical AEG Kabel AG
Priority to DE19893938386 priority Critical patent/DE3938386A1/en
Publication of DE3938386A1 publication Critical patent/DE3938386A1/en
Application status is Withdrawn legal-status Critical

Links

Classifications

    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B6/00Light guides
    • G02B6/02Optical fibre with cladding with or without a coating
    • G02B6/036Optical fibre with cladding with or without a coating core or cladding comprising multiple layers
    • G02B6/03694Multiple layers differing in properties other than the refractive index, e.g. attenuation, diffusion, stress properties
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B6/00Light guides
    • G02B6/02Optical fibre with cladding with or without a coating
    • G02B6/036Optical fibre with cladding with or without a coating core or cladding comprising multiple layers
    • G02B6/03616Optical fibres characterised both by the number of different refractive index layers around the central core segment, i.e. around the innermost high index core layer, and their relative refractive index difference
    • G02B6/03622Optical fibres characterised both by the number of different refractive index layers around the central core segment, i.e. around the innermost high index core layer, and their relative refractive index difference having 2 layers only
    • G02B6/03627Optical fibres characterised both by the number of different refractive index layers around the central core segment, i.e. around the innermost high index core layer, and their relative refractive index difference having 2 layers only arranged - +
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B6/00Light guides
    • G02B6/02Optical fibre with cladding with or without a coating
    • G02B6/036Optical fibre with cladding with or without a coating core or cladding comprising multiple layers
    • G02B6/03616Optical fibres characterised both by the number of different refractive index layers around the central core segment, i.e. around the innermost high index core layer, and their relative refractive index difference
    • G02B6/03638Optical fibres characterised both by the number of different refractive index layers around the central core segment, i.e. around the innermost high index core layer, and their relative refractive index difference having 3 layers only

Abstract

In an optical waveguide with a cladding tube region (4), cladding layers (3) and a core (2), the novelty is that a barrier region (5) is provided to prevent transfer of the attenuation-increasing properties of the cladding tube region to the optically active region. Pref. the barrier region is a glass or doped SiO2 layer between the cladding tube region and the cladding layers. ADVANTAGE - The waveguide has extremely low attenuation.

Description

Lichwellenleiter bestehen bekanntlich aus einem Kern und einem Mantel. Fiber optic consist known consisting of a core and a cladding. Die heiden Bereiche unterscheiden sich durch Material mit unterschiedlichem Brechungs index. The heiden areas differ by index material with different refraction. Ein Lichtwellenleiter wird beispielsweise da durch hergestellt, daß die Innenwand eines Glasrohres (Mantelrohr) mit Mantelschichten und danach mit Kern glasschichten innenbeschichtet wird und das innenbe schichtete Glasrohr kollabiert und zu einer Glasfaser (Lichtwellenleiter) ausgezogen wird. An optical waveguide is, for example, as prepared by, that the inner wall of a glass tube (casing) having cladding layers and then the glass layers with core is coated inside and collapsing the for indoor-coated glass tube and a glass fiber (optical fiber) is drawn.

Der Erfindung liegt die Aufgabe zugrunde, einen Licht wellenleiter anzugeben, der eine möglichst geringe Lichtdämpfung aufweist. The object underlying the invention is to provide an optical waveguide having a small light attenuation as possible. Diese Aufgabe wird durch einen Lichtwellenleiter mit den Merkmalen des Anspruchs 1 gelöst. This object is achieved by an optical waveguide having the features of claim 1.

Die Erfindung wird im folgenden an einem Ausführungs beispiel erläutert. The invention is explained below using an execution example.

Die Fig. 1 zeigt den konstruktiven Aufbau eines Licht wellenleiters 1 nach der Erfindung. Fig. 1 shows the structural design of an optical fiber 1 according to the invention. Der erfindungsge mäße Lichtwellenleiter 1 der Fig. 1 weist in der Mitte einen Kern 2 auf, der von Mantelschichten 3 um geben ist. The erfindungsge Permitted optical waveguide 1 of FIG. 1 has in the center on a core 2, which is passed from the cladding layers 3 in order. Zwischen dem Mantelschichtbereich 3 und dem Mantelrohr 4 ist erfindungsgemäß ein Sperrberreich 5 vorgesehen, der die Dämpfung, die das den Lichtwellen leiter durchlaufende Licht erfährt, reduziert. Between the cladding layer region 3 and the jacket tube 4, a Sperrberreich 5 is according to the invention is provided, which reduces the damping experienced by the head of the light waves passing through light.

Der Sperrbereich 5 besteht vorzugsweise aus Glas. The locking portion 5 is preferably made of glass. Die Mantelschichten 3 , die bei der Herstellung des Licht wellenleiters beispielsweise auf die Innenwand eines Mantelrohrs ( 4 ) aufgebracht werden, und vorzugsweise aus Glas bestehen, haben bekanntlich einen kleineren Brechungsindex als der Kern 2 . The cladding layers 3, which are applied on the waveguide, for example the inner wall of the tubular casing in the production of light (4), and preferably are made of glass, are known to have a smaller refractive index than the core. 2 Der nach der Erfindung vorgesehene Sperrbereich ( 5 ) hat einen Brechungsindex, der gleich dem Brechungsindex des Mantelrohrbe reichs ( 4 ) oder größer als der Brechungsindex des Mantelrohrbereichs ( 4 ) ist. The proposed according to the invention lock region (5) has a refractive index which is equal to the refractive index of the Mantelrohrbe Reich (4) or greater than the refractive index of the cladding tube portion (4). Der Sperrbereich 5 weist vorzugsweise einen größeren Brechungsindex als die Mantelschichten ( 3 ) auf. The locking portion 5 preferably has a larger refractive index than the cladding layers (3). Die Dicke des erfindungsge mäßen Sperrbereichs 5 liegt beispielsweise zwischen 2µ und 3µ. The thickness of the erfindungsge MAESSEN locking portion 5 is for example between 2μ and 3μ.

Der Sperrbereich 5 besteht beispielsweise aus dotiertem SiO 2 . The locking region 5 consists for example of doped SiO 2. Als Dotierstoff eignet sich beispielsweise eine phosphordotierung und/oder Fluordotierung und/oder Bor dotierung und/oder Germaniumdotierung. As a dopant, for example, a phosphorus doping and / or fluorine doping and / or boron is doped and / or germanium doping.

Die Fig. 2 zeigt das Brechungsindexprofil eines Licht wellenleiters nach der Erfindung. Fig. 2 shows the refractive index profile of an optical waveguide according to the invention. Wie die Fig. 2 zeigt, hat der Sperrbereich 5 im Ausführungsbeispiel den gleichen Brechungsindex wie das Mantelrohr 4 . As FIG. 2, the locking portion 5 in the embodiment has the same refractive index as the jacket tube 4. Nach der Fig. 2 hat der aus einer Vielzahl von Mantel schichten bestehende Mantelschichtbereich 3 einen kleineren Brechungsindex als der daran angrenzenden Sperrbereich 5 und das Mantelrohr 4 . According to FIG. 2, the of a plurality of cladding layers existing coat layer portion 3 has a smaller refractive index than the adjoining locking portion 5 and the jacket tube 4. Wie die Fig. 2 weiter zeigt, hat der Kern 2 einen größeren Brechungs index als die Mantelschichten ( 3 ), der Sperrbereich 5 und das Mantelrohr 4 . As FIG. 2 further shows the core 2 of the locking portion 5 and the jacket tube 4 has a greater refractive index than the cladding layers (3).

Claims (8)

1. Lichtwellenleiter mit einem Mantelrohrbereich, mit Mantelschichten und mit einem Kern, dadurch gekenn zeichnet, daß ein Sperrbereich vorgesehen ist, der ver hindert, daß dämpfungserhöhende Eigenschaften vom Mantelrohrbereich auf den optisch aktiven Bereich über tragen werden. 1. Optical fibers with a sheath tube portion, with cladding layers and having a core, characterized characterized marked in that a locking region is provided, which pre vents that dämpfungserhöhende properties are borne by the casing area on the optically active region over.
2. Lichtwellenleiter nach Anspruch 1, dadurch gekenn zeichnet, daß der Sperrbereich zwischen dem Mantelrohr bereich und den Mantelschichten angeordnet ist. 2. Optical fiber according to claim 1, characterized in that the blocking area between the mandrel section and the cladding layers is arranged.
3. Lichtwellenleiter nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Sperrbereich den Brechungsindex des Mantelrohrbereichs aufweist. 3. An optical waveguide according to claim 1 or 2, characterized in that the locking region has a refractive index of the cladding tube portion.
4. Lichtwellenleiter nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Sperrbereich einen größeren Brechungsindex als der Mantelrohrbereich aufweist. 4. An optical waveguide according to claim 1 or 2, characterized in that the locking area has a greater refractive index than the cladding tube portion.
5. Lichtwellenleiter nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß der Sperrbereich einen höheren Brechungsindex als die Mantelschichten auf weist. 5. An optical waveguide according to any one of claims 1 to 4, characterized in that the locking region has a higher refractive index than the cladding layers.
6. Lichtwellenleiter nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß der Sperrbereich aus einem Glas besteht. 6. An optical waveguide according to any one of claims 1 to 5, characterized in that the locking area is composed of glass.
7. Lichtwellenleiter nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß der Sperrbereich aus do tiertem SiO 2 besteht. 7. An optical waveguide according to any one of claims 1 to 6, characterized in that the stop band of do tiertem SiO 2.
8. Lichtwellenleiter nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß als Dotierstoff eine ph osphordotierung und/oder Fluordotierung und/oder Bordo tierung und/oder Germaniumdotierung vorgesehen ist. 8. An optical waveguide according to any one of claims 1 to 7, characterized in that a ph osphordotierung and / or fluorine doping and / or Bordo orientation and / or germanium doping is provided as the dopant.
DE19893938386 1989-11-18 1989-11-18 Optical waveguide with low attenuation - provided by barrier layer between cladding tube and optically active region Withdrawn DE3938386A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19893938386 DE3938386A1 (en) 1989-11-18 1989-11-18 Optical waveguide with low attenuation - provided by barrier layer between cladding tube and optically active region

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19893938386 DE3938386A1 (en) 1989-11-18 1989-11-18 Optical waveguide with low attenuation - provided by barrier layer between cladding tube and optically active region

Publications (1)

Publication Number Publication Date
DE3938386A1 true DE3938386A1 (en) 1991-05-23

Family

ID=6393801

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19893938386 Withdrawn DE3938386A1 (en) 1989-11-18 1989-11-18 Optical waveguide with low attenuation - provided by barrier layer between cladding tube and optically active region

Country Status (1)

Country Link
DE (1) DE3938386A1 (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4229070A (en) * 1978-07-31 1980-10-21 Corning Glass Works High bandwidth optical waveguide having B2 O3 free core and method of fabrication
US4230396A (en) * 1978-07-31 1980-10-28 Corning Glass Works High bandwidth optical waveguides and method of fabrication
DE3446664A1 (en) * 1984-01-10 1985-07-18 Int Standard Electric Corp Optical waveguide with hydrogen-barrier, and process for its preparation
US4641917A (en) * 1985-02-08 1987-02-10 At&T Bell Laboratories Single mode optical fiber
DE3725252A1 (en) * 1986-10-06 1988-04-14 Jenaer Glaswerk Veb Preform for a multimode optical fibre
EP0154026B1 (en) * 1980-07-17 1988-09-07 BRITISH TELECOMMUNICATIONS public limited company A monomode optical fibre and a method of manufacture
EP0125828B1 (en) * 1983-05-02 1988-10-12 Sumitomo Electric Industries Limited Optical fiber and process for producing the same

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4229070A (en) * 1978-07-31 1980-10-21 Corning Glass Works High bandwidth optical waveguide having B2 O3 free core and method of fabrication
US4230396A (en) * 1978-07-31 1980-10-28 Corning Glass Works High bandwidth optical waveguides and method of fabrication
DE2930398C2 (en) * 1978-07-31 1991-10-17 Corning Glass Works, Corning, N.Y., Us
EP0154026B1 (en) * 1980-07-17 1988-09-07 BRITISH TELECOMMUNICATIONS public limited company A monomode optical fibre and a method of manufacture
EP0125828B1 (en) * 1983-05-02 1988-10-12 Sumitomo Electric Industries Limited Optical fiber and process for producing the same
DE3446664A1 (en) * 1984-01-10 1985-07-18 Int Standard Electric Corp Optical waveguide with hydrogen-barrier, and process for its preparation
US4641917A (en) * 1985-02-08 1987-02-10 At&T Bell Laboratories Single mode optical fiber
DE3725252A1 (en) * 1986-10-06 1988-04-14 Jenaer Glaswerk Veb Preform for a multimode optical fibre

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Legal Events

Date Code Title Description
OM8 Search report available as to paragraph 43 lit. 1 sentence 1 patent law
8127 New person/name/address of the applicant

Owner name: KABEL RHEYDT AG, 4050 MOENCHENGLADBACH, DE

8139 Disposal/non-payment of the annual fee