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WO1991006883A1 - Light guide coupler - Google Patents

Light guide coupler Download PDF

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Publication number
WO1991006883A1
WO1991006883A1 PCT/DE1990/000834 DE9000834W WO9106883A1 WO 1991006883 A1 WO1991006883 A1 WO 1991006883A1 DE 9000834 W DE9000834 W DE 9000834W WO 9106883 A1 WO9106883 A1 WO 9106883A1
Authority
WO
WIPO (PCT)
Prior art keywords
light guide
light
guide coupler
coupler according
capillary
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.)
Ceased
Application number
PCT/DE1990/000834
Other languages
German (de)
French (fr)
Inventor
Erhard Giese
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of WO1991006883A1 publication Critical patent/WO1991006883A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • G02B6/42—Coupling light guides with opto-electronic elements
    • G02B6/4201—Packages, e.g. shape, construction, internal or external details
    • G02B6/4246—Bidirectionally operating package structures
    • 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
    • G02B6/36—Mechanical coupling means
    • G02B6/38—Mechanical coupling means having fibre to fibre mating means
    • G02B6/3801—Permanent connections, i.e. wherein fibres are kept aligned by mechanical means
    • G02B6/3803—Adjustment or alignment devices for alignment prior to splicing
    • 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
    • G02B6/42—Coupling light guides with opto-electronic elements
    • G02B6/4201—Packages, e.g. shape, construction, internal or external details
    • G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
    • G02B6/4214—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms the intermediate optical element having redirecting reflective means, e.g. mirrors, prisms for deflecting the radiation from horizontal to down- or upward direction toward a device
    • 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
    • G02B6/42—Coupling light guides with opto-electronic elements
    • G02B6/4201—Packages, e.g. shape, construction, internal or external details
    • G02B6/4256—Details of housings
    • G02B6/4257—Details of housings having a supporting carrier or a mounting substrate or a mounting plate
    • G02B6/4259—Details of housings having a supporting carrier or a mounting substrate or a mounting plate of the transparent type
    • 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
    • G02B6/42—Coupling light guides with opto-electronic elements
    • G02B6/4201—Packages, e.g. shape, construction, internal or external details
    • G02B6/4286—Optical modules with optical power monitoring

Definitions

  • the invention relates to an optical fiber coupler for coupling two optical fibers.
  • Optical fibers are used to transmit information over long distances. It is regularly desirable to be able to interrogate the information to be transmitted at certain locations, ie to decouple a small amount of light or to couple information onto the light guide.
  • the invention has for its object to provide a light guide coupler which is suitable for coupling out and coupling in light in a simple construction.
  • this object is achieved by a capillary which receives the bevelled ends of the end sections of two light guides and which, at the level of the abutting ends, are arranged opposite one another and are oriented toward the interface between the ends of the end sections.
  • both photoelectric elements are photodiodes, but one of the two photoelectric elements can also be a photodiode and the other an LED. In exceptional cases, both photoelectric elements are formed by LEDs.
  • the two beveled ends etc. are glued to one another with an optically transparent adhesive.
  • the two ends can be provided with a dielectric mirror layer, or else with a partially transparent metal mirror.
  • the capillary should consist of glass, preferably quartz glass, the end sections of the light guides being welded to the capillary.
  • the end sections of the light guide can also be glued to the capillary.
  • the invention is explained below with reference to a drawing.
  • the single figure shows a schematic representation of such a light guide coupler.
  • the light guide coupler consists of a body 28 which is provided with a bore 30.
  • a glass capillary 22 is inserted into this bore, the inside diameter of which is slightly larger than the outside diameter of the light guides 18, 20 to be connected to one another.
  • the end sections 14, 16 of the light guides 18, 20 are inserted into the glass capillary 22, the ends 10, 12 of the end sections 14, 16, which are chamfered at an angle of 45 degrees, lie closely against one another, if necessary using a transparent adhesive .
  • the light- conductors 18, 20 themselves are connected to the body 28 of the coupler by a melting or adhesive plug 32.
  • the body 28 has photoelectric elements 24, 26 arranged opposite one another at the level of the interfaces of the ends 10, 12 of the end sections 14, 16 of the light guides 18, 20. These photoelectric elements can be two photodiodes, two LEDs or one photodiode and one LED.
  • the outcoupled light reaches one of the photoelectric elements, depending on the direction of the light on the photoelectric element 24 or else the photoelectric element 26.
  • the light guide coupler proposed here makes it possible to determine the direction of the light (Very little light output is coupled out of the light guide for this task).
  • a light source can then be controlled so that the light power transported by the fiber becomes independent of its temperature, aging or other influences.
  • Another application is an optical sensor: light is coupled into the light guide 18, for example by means of LEDs, part of the light being coupled out via the photoelectric element in order to regulate the light intensity of the light source to a fixed value.
  • the light passes through the light guide 16 to a sensor head which, depending on the measured variable, reflects more or less light back into the fiber.
  • the detector 16 receives this reflected light, which is now a measure of the measured variable.
  • the advantage over other known light guide couplers is that the partially transparent mirror covers the entire fiber cross-section uniformly and is not influenced by random changes in the light distribution in the light guide (mode hopping).

Landscapes

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

Abstract

A light-guide coupler for coupling two fiber optic light-guides has a capillary tube (22) for receiving the bevelled extremities (10, 12) of the terminal sections (14, 16) of two light-guides (18, 20). The capillary tube (22) bears two opposite photoelectric elements (24, 26) at the level of the adjacent extremities (10, 12), oriented towards the interface between the extremities (10, 12) of the terminal sections (14, 16).

Description

Lichtleiter-Koppler Optical fiber coupler

Die Erfindung betrifft einen Lichtleiter-Koppler zum Koppeln von zwei Lichtleitfasern.The invention relates to an optical fiber coupler for coupling two optical fibers.

Lichtleiter dienen zur Übertragung einer Information über weite Strecken. Dabei ist es regelmäßig erwünscht, die zu übertragende Information an bestimmten Orten ab¬ fragen zu können, einen geringen Betrag des Lichts also auszukoppeln bzw. Information auf den Lichtleiter ein¬ zukuppeln.Optical fibers are used to transmit information over long distances. It is regularly desirable to be able to interrogate the information to be transmitted at certain locations, ie to decouple a small amount of light or to couple information onto the light guide.

Der Erfindung liegt die Aufgabe zugrunde, einen Lichtleiter-Koppler zu schaffen, der bei einem einfa¬ chen Aufbau zum Auskoppeln und zum Einkoppeln von Licht geeignet ist.The invention has for its object to provide a light guide coupler which is suitable for coupling out and coupling in light in a simple construction.

Erfindungsgemäß wird diese Aufgabe gelöst eine die mit abgeschrägten Enden versehenen Endabschnitte zweier Lichtleiter aufnehmende Kapillare, die auf der Höhe der einander anliegenden Enden einander gegenüberliegend angeordnete, auf die Grenzfläche zwischen den Enden der Endabschnitte ausgerichtete fotoelektrische Elemente trägt.According to the invention, this object is achieved by a capillary which receives the bevelled ends of the end sections of two light guides and which, at the level of the abutting ends, are arranged opposite one another and are oriented toward the interface between the ends of the end sections.

Dabei wird vorgeschlagen, daß die beiden Enden zu der Achse der Endabschnitte der Lichtleiter unter einem Winkel von 45 ° abgeschrägt sind. Je nach Anwendung sind beide fotoelektrischen Elemente Fotodioden, es kann aber auch eines der beiden foto¬ elektrischen Elemente eine Fotodiode, das andere ein LED sein. In Ausnahmefällen werden auch beide fotoelek¬ trischen Elemente durch LED gebildet.It is proposed that the two ends are beveled at an angle of 45 ° to the axis of the end sections of the light guide. Depending on the application, both photoelectric elements are photodiodes, but one of the two photoelectric elements can also be a photodiode and the other an LED. In exceptional cases, both photoelectric elements are formed by LEDs.

Bei einem bevorzugten Ausführungsbeispiel sind die bei¬ den abgeschrägten Enden usw. mit einem optisch transpa¬ renten Klebstoff miteinander verklebt.In a preferred embodiment, the two beveled ends etc. are glued to one another with an optically transparent adhesive.

Die beiden Enden können mit einer dielektrischen Spiegelschicht, oder aber auch mit einem teildurchläs¬ sigen Metallspiegel versehen sein.The two ends can be provided with a dielectric mirror layer, or else with a partially transparent metal mirror.

Die Kapillare soll aus Glas, vorzugsweise aus Quarzglas bestehen, wobei die Endabschnitte der Lichtleiter mit der Kapillare verschweißt sind. Die Endabschnitte der Lichtleiter können mit der Kapillare aber auch verklebt sein.The capillary should consist of glass, preferably quartz glass, the end sections of the light guides being welded to the capillary. The end sections of the light guide can also be glued to the capillary.

Die Erfindung wird im folgenden anhand einer Zeichnung erläutert. Dabei zeigt die einzige Figur eine schemati¬ sche Darstellung eines derartigen Lichtleiter-Kopplers.The invention is explained below with reference to a drawing. The single figure shows a schematic representation of such a light guide coupler.

Der Lichtleiter-Koppler besteht aus einem Körper 28, der mit einer Bohrung 30 versehen ist. In diese Bohrung ist eine Glaskapillare 22 eingesetzt, deren Innendurch¬ messer geringfügig größer als der Außendurchmesser der miteinander zu verbindenen Lichtleiter 18, 20 ist. Die Endabschnitte 14, 16 der Lichtleiter 18, 20 sind in die Glaskapillare 22 eingesetzt, wobei die unter einem Win¬ kel von 45 Grad abgeschrägten Enden 10, 12 der Endab¬ schnitte 14, 16 eng aneinander anliegen, ggf. unter Verwendung eines transparenten Klebstoffs. Die Licht- leiter 18, 20 selbst sind mit dem Körper 28 des Kop¬ plers durch einen Schmelz- oder Klebpropfen 32 verbun¬ den.The light guide coupler consists of a body 28 which is provided with a bore 30. A glass capillary 22 is inserted into this bore, the inside diameter of which is slightly larger than the outside diameter of the light guides 18, 20 to be connected to one another. The end sections 14, 16 of the light guides 18, 20 are inserted into the glass capillary 22, the ends 10, 12 of the end sections 14, 16, which are chamfered at an angle of 45 degrees, lie closely against one another, if necessary using a transparent adhesive . The light- conductors 18, 20 themselves are connected to the body 28 of the coupler by a melting or adhesive plug 32.

Der Körper 28 auf der Höhe der Grenzflächen der Enden 10, 12 der Endabschnitte 14, 16 der Lichtleiter 18, 20 einander gegenüberliegend angeordnete fotoelektrische Elemente 24, 26 auf. Bei diesen fotoelektrischen Ele¬ menten kann es sich um zwei Fotodioden, zwei LED's oder aber um eine Fotodiode und eine LED handeln.The body 28 has photoelectric elements 24, 26 arranged opposite one another at the level of the interfaces of the ends 10, 12 of the end sections 14, 16 of the light guides 18, 20. These photoelectric elements can be two photodiodes, two LEDs or one photodiode and one LED.

Bei Transport von Licht durch den Lichtleiter wird an den Grenzflächen aufgrund des Reflexionsgesetzes ein Teil des Lichtes unter einem Winkel von 90° aus der Fa¬ ser herausgespiegelt. Durch die Wahl des Berechnungsin- dex des Klebstoffs kann das Maß der ausgekoppelten Lei¬ stung verändert werden. Bei Aufbringung eines dielek¬ trischen Stoffs oder bei Aufbringung eines teildurch¬ lässigen Metallspiegels kann auch ein erheblicher An¬ teil des Lichts ausgespiegelt werden.When light is transported through the light guide, part of the light is reflected out of the fiber at an angle of 90 ° at the interfaces due to the law of reflection. The measure of the output coupled can be changed by the choice of the calculation index of the adhesive. When applying a dielectric material or applying a partially transparent metal mirror, a considerable proportion of the light can also be reflected.

Das ausgekoppelte Licht gelangt auf eines der fotoelek¬ trischen Elemente, und zwar in Abhängigkeit von der Richtung des Lichts auf das fotoelektrische Element 24 oder aber das fotoelektrische Element 26. Der hier vor¬ geschlagene Lichtleiter-Koppler ermöglicht es so, die Richtung des Lichts festzustellen (für diese Aufgabe wird nur sehr wenig Lichtleistung aus dem Lichtleiter ausgekoppelt) .The outcoupled light reaches one of the photoelectric elements, depending on the direction of the light on the photoelectric element 24 or else the photoelectric element 26. The light guide coupler proposed here makes it possible to determine the direction of the light (Very little light output is coupled out of the light guide for this task).

Bei bekannter Richtung des Lichts ist es auch möglich, eine geringfügige Lichtmenge auszukoppeln und - vor¬ zugsweise in Abhängigkeit von der Intensität des ausge¬ koppelten Lichts - das andere, aus einer LED oder son- stigen Lichtquelle gebildete Element entsprechend anzu¬ steuern, um eine bestimmte Lichtleistung in der Licht¬ leitfaser zu bewirken. Bei Aufbau eines entsprechenden elektronischen Regelkreises läßt sich dann eine Licht¬ quelle so ansteuern, daß die von der Faser transpor¬ tierte Lichtleistung unabhängig von deren Temperatur, Alterung oder sonstigen Einflüssen wird.If the direction of the light is known, it is also possible to decouple a small amount of light and - preferably depending on the intensity of the outcoupled light - the other, from an LED or other Actual element formed according to other light source in order to bring about a certain light output in the optical fiber. When a corresponding electronic control circuit is set up, a light source can then be controlled so that the light power transported by the fiber becomes independent of its temperature, aging or other influences.

Ein weiterer Anwendungsfall ist ein optischer Sensor: Licht wird, beispielsweise durch LED - in den Lichtlei¬ ter 18 eingekoppelt, wobei über das fotoelektrische Element ein Teil des Lichts ausgekoppelt wird, um die Lichtintensität der Lichtquelle auf einen festen Wert zu regeln. Das Licht gelangt über den Lichtleiter 16 zu einem Sensorkopf, der in Abhängigkeit von der Meßgröße mehr oder weniger Licht in die Faser zurückreflektiert. Der Detektor 16 empfängt dieses reflektierte Licht, das nun ein Maß für die Meßgröße darstellt.Another application is an optical sensor: light is coupled into the light guide 18, for example by means of LEDs, part of the light being coupled out via the photoelectric element in order to regulate the light intensity of the light source to a fixed value. The light passes through the light guide 16 to a sensor head which, depending on the measured variable, reflects more or less light back into the fiber. The detector 16 receives this reflected light, which is now a measure of the measured variable.

Gegenüber anderen vorbekannten Lichtleiter-Kopplern be¬ steht der Vorteil darin, daß der teildurchlässige Spiegel den gesamten Faserquerschnitt gleichmäßig er¬ faßt und nicht von zufälligen Änderungen der Lichtver¬ teilung im Lichtleiter (Mode-hopping) beeinflußt wird. The advantage over other known light guide couplers is that the partially transparent mirror covers the entire fiber cross-section uniformly and is not influenced by random changes in the light distribution in the light guide (mode hopping).

Claims

ANSPRUCHE EXPECTATIONS 1. Lichtleiter-Koppler zum Koppeln von zwei Lichtleit¬ fasern, gekennzeichnet durch eine die mit abgeschrägten Enden (10, 12) versehenen Endabschnitte (14, 16) zweier Lichtleiter (18, 20) aufnehmende Kapillare (22), die auf der Höhe der einander anliegenden Enden (10, 12) einander gegenüberliegend angeordnete, auf die Grenz¬ fläche zwischen den Enden (10, 12) der Endabschnitte (14, 16) ausgerichtete fotoelektrische Elemente (24, 26) trägt.1. light guide coupler for coupling two Lichtleit¬ fibers, characterized by one with the bevelled ends (10, 12) provided end sections (14, 16) of two light guides (18, 20) receiving capillary (22) at the level of mutually adjacent ends (10, 12) which are arranged opposite one another and which are aligned with the boundary surface between the ends (10, 12) of the end sections (14, 16) and photoelectric elements (24, 26). 2. Lichtleiter-Koppler nach Anspruch l, dadurch ge¬ kennzeichnet, daß die beiden Enden (10, 12) zu der Ach¬ se der Endabschnitte (14, 16) der Lichtleiter (18, 20) unter einem Winkel von 45 Grad angeschrägt sind.2. Light guide coupler according to claim l, characterized ge indicates that the two ends (10, 12) to the axis of the end sections (14, 16) of the light guide (18, 20) are chamfered at an angle of 45 degrees . 3. Lichtleiter-Koppler nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß die beiden fotoelektrischen Elemente (24, 26) Fotodioden sind.3. Light guide coupler according to one of the preceding claims, characterized in that the two photoelectric elements (24, 26) are photodiodes. 4. Lichtleiter-Koppler nach Anspruch 1 oder Anspruch 2, dadurch gekennzeichnet, daß das eine der fotoelek¬ trischen Elemente (24) eine Fotodiode, das andere foto¬ elektrische Element (26) eine LED ist. 4. Light guide coupler according to claim 1 or claim 2, characterized in that one of the photoelectric elements (24) is a photodiode, the other photoelectric element (26) is an LED. 5. Lichtleiter-Koppler nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß die aneinander anliegenden Enden (10, 12) mit einem transparenten Klebstoff miteinander verklebt sind.5. Light guide coupler according to one of the preceding claims, characterized in that the abutting ends (10, 12) are glued together with a transparent adhesive. 6. Lichtleiter-Koppler nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß das eine der beiden Enden (10, 12) mit einer dielektrischen Spiegel¬ schicht versehen ist.6. Light guide coupler according to one of the preceding claims, characterized in that the one of the two ends (10, 12) is provided with a dielectric Spiegel¬ layer. 7. Lichtleiter-Koppler nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß eines der Enden (10) mit einem teildurchlässigen Metallspiegel versehen ist.7. Light guide coupler according to one of claims 1 to 5, characterized in that one of the ends (10) is provided with a partially transparent metal mirror. 8. Lichtleiter-Koppler nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß die Kappilare (22) eine Quarzglaskapillare ist.8. Light guide coupler according to one of the preceding claims, characterized in that the capillary (22) is a quartz glass capillary. 9. Lichtleiter-Koppler nach Anspruch 8, dadurch ge¬ kennzeichnet, daß die Endabschnitte (14, 16) der Licht¬ leiter (18, 20) mit der Kapillare (22) verschweißt sind.9. light guide coupler according to claim 8, characterized ge indicates that the end portions (14, 16) of the light guide (18, 20) are welded to the capillary (22). 10. Lichtleiter-Koppler nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß die Endabschnitte (14, 16) der Lichtleitern (18, 20) mit der Kapillare (22) verklebt sind. 10. Light guide coupler according to one of claims 1 to 8, characterized in that the end sections (14, 16) of the light guides (18, 20) are glued to the capillary (22).
PCT/DE1990/000834 1989-11-04 1990-11-03 Light guide coupler Ceased WO1991006883A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8913067U DE8913067U1 (en) 1989-11-04 1989-11-04 Fiber optic coupler
DEG8913067.7U 1989-11-04

Publications (1)

Publication Number Publication Date
WO1991006883A1 true WO1991006883A1 (en) 1991-05-16

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ID=6844304

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1990/000834 Ceased WO1991006883A1 (en) 1989-11-04 1990-11-03 Light guide coupler

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DE (1) DE8913067U1 (en)
WO (1) WO1991006883A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6612751B1 (en) * 1999-03-31 2003-09-02 Tohoku Electric Power Co., Inc. Optical repeating device with monitoring function
DE10196455B4 (en) * 2001-05-23 2006-11-16 Infineon Technologies Ag Module for optical signal transmission
CN107367799A (en) * 2016-05-13 2017-11-21 福州高意通讯有限公司 A kind of optical fiber photodetection structure

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1232764B (en) * 1965-04-27 1967-01-19 Licentia Gmbh Receiving arrangement by means of assembled fiber optic rods
FR2436404A1 (en) * 1978-09-18 1980-04-11 Siemens Ag BYPASS ELEMENT, IN PARTICULAR FOR OPTICAL INFORMATION TRANSMISSION SYSTEMS
US4284449A (en) * 1979-12-26 1981-08-18 Gte Laboratories Incorporated Method for producing an optical power sampling device
DE3005647A1 (en) * 1980-02-15 1981-08-20 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Optical beam divider for e.g .fibre optic system - has glass or quartz-glass fibre fused into capillary of similar material with pair ground and polished after curving
FR2549243A1 (en) * 1983-06-24 1985-01-18 Lyonnaise Transmiss Optiques Directional coupler with associated components for light waves.
US4789214A (en) * 1987-09-21 1988-12-06 Tacan Corporation Micro-optical building block system and method of making same

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1232764B (en) * 1965-04-27 1967-01-19 Licentia Gmbh Receiving arrangement by means of assembled fiber optic rods
FR2436404A1 (en) * 1978-09-18 1980-04-11 Siemens Ag BYPASS ELEMENT, IN PARTICULAR FOR OPTICAL INFORMATION TRANSMISSION SYSTEMS
US4284449A (en) * 1979-12-26 1981-08-18 Gte Laboratories Incorporated Method for producing an optical power sampling device
DE3005647A1 (en) * 1980-02-15 1981-08-20 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Optical beam divider for e.g .fibre optic system - has glass or quartz-glass fibre fused into capillary of similar material with pair ground and polished after curving
FR2549243A1 (en) * 1983-06-24 1985-01-18 Lyonnaise Transmiss Optiques Directional coupler with associated components for light waves.
US4789214A (en) * 1987-09-21 1988-12-06 Tacan Corporation Micro-optical building block system and method of making same

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6612751B1 (en) * 1999-03-31 2003-09-02 Tohoku Electric Power Co., Inc. Optical repeating device with monitoring function
DE10196455B4 (en) * 2001-05-23 2006-11-16 Infineon Technologies Ag Module for optical signal transmission
CN107367799A (en) * 2016-05-13 2017-11-21 福州高意通讯有限公司 A kind of optical fiber photodetection structure

Also Published As

Publication number Publication date
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