WO2003005090A1 - Device for positioning an optical fibre - Google Patents

Device for positioning an optical fibre Download PDF

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Publication number
WO2003005090A1
WO2003005090A1 PCT/EP2002/006704 EP0206704W WO03005090A1 WO 2003005090 A1 WO2003005090 A1 WO 2003005090A1 EP 0206704 W EP0206704 W EP 0206704W WO 03005090 A1 WO03005090 A1 WO 03005090A1
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WO
WIPO (PCT)
Prior art keywords
fiber
light
optical component
optical
carrier
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Application number
PCT/EP2002/006704
Other languages
German (de)
French (fr)
Inventor
Dag Neumeuer
Martin Brahms
Original Assignee
Mergeoptics 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 Mergeoptics Gmbh filed Critical Mergeoptics Gmbh
Priority to EP02762291A priority Critical patent/EP1402301A1/en
Publication of WO2003005090A1 publication Critical patent/WO2003005090A1/en

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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
    • G02B6/42—Coupling light guides with opto-electronic elements
    • G02B6/4201—Packages, e.g. shape, construction, internal or external details
    • G02B6/4219—Mechanical fixtures for holding or positioning the elements relative to each other in the couplings; Alignment methods for the elements, e.g. measuring or observing methods especially used therefor
    • G02B6/4228—Passive alignment, i.e. without a detection of the degree of coupling or the position of the elements
    • G02B6/423—Passive alignment, i.e. without a detection of the degree of coupling or the position of the elements using guiding surfaces for the alignment
    • 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

Definitions

  • the invention relates! an arrangement for positioning an optical fiber relative to an optical component equipped with an active surface, with which light is transmitted from the light-conducting core and a fiber surrounding the same to the component or is coupled into the fiber by the component.
  • the optical component which is designed as a semiconductor circuit in modern technology, can be designed as a receiver or a transmitter.
  • a receiver for example, a photodiode with an associated amplifier is used.
  • a laser diode with a driver circuit can be used for the optical component.
  • the respective optical component has an active surface with a predetermined size for the reception or the transmission of light. The frequency of the data or signals to be transmitted is also important for their measurement.
  • the fibers are positioned so that their core, which has a diameter of 9 ⁇ m, for example, lies with its end face as close as possible to the active face of the optical component.
  • the relative position of fibers and active areas is not so critical if the optical component is a receiving diode because the active areas are sufficiently large.
  • an optimal position is determined in each case active adjustment set. If the optical component is a transmitter, lenses are usually also installed between the active surfaces and the fibers or fibers with a lens head are used.
  • the active area of the optical components must be smaller in order to avoid excessive capacities in the same. Such capacities have to be as small as possible so that the necessary electrical recharges can be carried out at a sufficiently high speed.
  • the previous technology for coupling fibers and optical components is not very suitable for this application.
  • the invention has for its object to design the arrangement described above so that an optimal coupling between the active surface of an optical component and an optical fiber can be achieved in a simple manner.
  • optical fiber is arranged in a rectilinear groove of a flat carrier consisting of a semiconductor material, which also carries the optical component,
  • That the channel begins at an edge of the beam and ends at an end face in the course thereof
  • That the end face is designed as a light reflecting, flat mirror surface, which extends at an acute angle to the axis of the fiber lying in the groove, and
  • optical component is positioned with its active surface in the immediate vicinity of the mirror surface, that after reflection on the same, light guided by the fiber falls on the active surface or light emanating from the optical component is coupled into the core of the fiber.
  • Troughs for receiving an optical fiber can be manufactured with great accuracy in the carrier made of semiconductor material, just like the optical fibers themselves. This also applies to the end face formed in the finished arrangement as a mirror surface at the end of a trough.
  • the optical component can also be positioned with great accuracy on the carrier so that its active surface is in the correct position in the immediate vicinity of the mirror surface. Light reflected from the same thus strikes by the shortest route to the active surface of the optical component. Light emanating from the same is coupled into the fiber in the shortest possible way.
  • a semiconductor material is used for the carrier, on which at least one further electronic circuit is attached.
  • Fig. 1 shows schematically a circuit for receiving optical signals.
  • Fig. 2 also schematically shows an optical component.
  • Fig. 3 shows an arrangement according to the invention also in a schematic representation.
  • FIG. 4 shows an end view of the arrangement according to FIG. 3.
  • Fig. 5 shows a detail in an enlarged view.
  • FIG. 6 shows another embodiment compared to FIG. 5.
  • Fig. 7 shows a further supplemented arrangement.
  • the photodiode 1 has as a light receiver a photodiode 1, for example a PIN diode, onto which the light of a signal stream transmitted via an optical fiber 2 falls.
  • An amplifier 3 for electrical signals is connected to the photodiode 1 operating as an opto / electrical converter, by means of which the signals supplied by the photodiode 1 are amplified into signals which can be processed further.
  • the bias voltage required for photodiode 1 is denoted by U B.
  • the photodiode 1 consists of semiconductor material, such as gallium arsenide or indium phosphide.
  • An active surface 4 and two electrical contacts 5 and 6, to which the amplifier 3 can be connected, for example, are located on the semiconductor material.
  • At least one groove 8 is first produced in a flat, plate-shaped carrier 7 made of semiconductor material.
  • the gutter 8 is straight and open. It begins at an edge 9 of the carrier 7 and ends in the course of the same at an end face 1 0.
  • the end face 1 0 runs at an acute angle a to the axis of a fiber 2 located in the groove 8.
  • the angle can be as an acute angle a at Create the groove 8 as a so-called V-groove (V-groove) by etching through the orientation of the crystals of the semiconductor material of the carrier 7, which consists for example of gallium arsenide or indium phosphide.
  • the end face 1 0 is mirrored after completion of the channel 8.
  • a metal can be evaporated onto the end face 10.
  • gold is used as the metal. Light striking the mirror surface thus generated is reflected by the latter.
  • the optical fiber 2 consists of a light-conducting core 1 1, which has a diameter of 9 ⁇ m, for example, and a jacket 12 surrounding the core 1 1, which has an outside diameter of, for example, 125 ⁇ m.
  • Core 1 1 and jacket 12 have different refractive indices.
  • the angle a of the end face 1 0 is expediently chosen such that light guided by the core 1 1 emerges from the fiber 2 in the shortest possible way after reflection on the mirror surface and is not reflected back into the core 1 1 if possible. With a deviation required in this sense, it is expediently in the vicinity of 45 °. If, in an advantageous embodiment, the end of the fiber 2 according to FIG. 6 is “sharpened” or arched outward in the axial direction, the distance between the mirror surface and the core 11 of the fiber 2 can be shortened without the reflection on the It can be achieved that the light to be transmitted is focused more sharply.
  • the groove 8 attached in the carrier 7 is, for example, V-shaped. It is preferably precisely matched to the dimensions of the fiber 2 so that it is guided exactly in the carrier 7.
  • the fiber 2 is appropriately attached in the groove 8 that . it is just below the surface of the carrier 7. It can then be inserted into the groove 8 in the longitudinal direction thereof, without the possibly already installed one Photodiode 1 to be hindered. In the end position, the fiber 2 then lies as close as possible to the mirror surface and just below the photodiode 1. This is positioned in the finished arrangement on the carrier 7 so that its active surface 4 lies at the point at which the light reflected by the end surface 1 0 strikes.
  • the carrier 7 consisting of semiconductor material can be provided with an electronic circuit 13 indicated by dashed lines, which is advantageously an amplifier. Further electronic circuits can also be attached to the carrier 7.
  • the photodiode 1 is positioned with its active surface 4 above the reflecting mirror surface of the carrier 7. Their contacts 5 and ⁇ are connected in the shortest possible way to corresponding contacts of the circuit 13.
  • Such short, electrically conductive connections can also be used in the carrier 7 made of semiconductor material to and between other electronic circuits of the same. A disturbance or distortion in the transmission of signals by the conductive connections can be largely excluded.
  • the arrangement for the direction of transmission of signal currents from the optical fiber 2 to the photodiode 1 is described above.
  • the arrangement can also be used for the opposite direction of transmission.
  • a transmitter is then used as the optical component.
  • a suitable transmitter is, for example, a laser diode.

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

Abstract

The invention relates to a device for positioning an optical fibre (2) in relation to an optical component (1) having an active surface. According to the invention, light is transmitted onto the component (1) by the fibre (2) comprising a light-transmitting core and a coating surrounding the same, or is injected by the component (1) into the fibre (2). The optical fibre (2) is arranged in a rectilinear channel of a plane carrier (7) consisting of a semiconductor material and carrying the optical component (1). The channel begins on an edge (9) of the carrier (7) and ends in the course of the same on a front surface (10). The front surface (10) is embodied as a plane, light-reflecting mirror surface which extends at a sharp angle (α) in relation to the axis of the fibre (2). The optical component (1) is positioned with its active surface directly next to the mirror surface in such a way that the light which is respectively guided by the fibre (2) onto said mirror surface following reflection falls on the active surface, or that the light from the optical component (1) is injected into the core of the fibre (2).

Description

Anordnung zur Positionierung einer optischen FaserArrangement for positioning an optical fiber
Beschreibungdescription
Die Erfindung betriff! eine Anordnung zur Positionierung einer optischen Faser relativ zu einem mit einer aktiven Fläche ausgerüsteten optischen Bauteil, mit welcher Licht von der einen Licht leitenden Kern und einen denselben umgebenden Mantel aufweisenden Faser auf das Bauteil übertragen oder von dem Bauteil in die Faser eingekoppelt wird.The invention relates! an arrangement for positioning an optical fiber relative to an optical component equipped with an active surface, with which light is transmitted from the light-conducting core and a fiber surrounding the same to the component or is coupled into the fiber by the component.
Eine solche Anordnung ist seit langem bekannt. Sie wird beispielsweise bei der Datenübertragung über Glasfasern bzw. Lichtwellenleitern benötigt. Das in moderner Technik als Halbleiterschaltung ausgeführte optische Bauteil kann dabei als Empfänger oder als Sender ausgeführt sein. Bei einem Empfänger wird beispielsweise eine Fotodiode mit zugehörigem Verstärker eingesetzt. Bei einem Sender kann für das optische Bauteil eine Laserdiode mit Treiberschaltung verwendet werden. Das jeweilige optische Bauteil hat für den Empfang bzw. das Senden von Licht eine aktive Fläche mit vorgegebener Größe. Für deren Bemessung ist auch die Frequenz der zu übertragenden Daten bzw. Signale von Bedeutung.Such an arrangement has long been known. It is required, for example, for data transmission via glass fibers or optical fibers. The optical component, which is designed as a semiconductor circuit in modern technology, can be designed as a receiver or a transmitter. In a receiver, for example, a photodiode with an associated amplifier is used. In the case of a transmitter, a laser diode with a driver circuit can be used for the optical component. The respective optical component has an active surface with a predetermined size for the reception or the transmission of light. The frequency of the data or signals to be transmitted is also important for their measurement.
Bei bekannten Anordnungen, die mit relativ niedrigen Frequenzen bzw. Datenraten arbeiten, werden die Fasern so positioniert, daß ihr Kern, der beispielsweise einen Durchmesser von 9 /im hat, mit seiner Stirnfläche möglichst nahe an der aktiven Fläche des optischen Bauteils liegt. Die relative Position von Fasern und aktiven Flächen ist dann nicht so kritisch, wenn es sich bei dem optischen Bauteil um eine Empfangsdiode handelt, weil die aktiven Flächen ausreichend groß sind. Außerdem wird insbesondere bei als Sender arbeitenden optischen Bauteilen eine jeweils optimale Position durch aktive Justage eingestellt. Wenn es sich bei dem optischen Bauteil um einen Sender handelt, werden meist auch noch Linsen zwischen den aktiven Flächen und den Fasern eingebaut oder es werden Fasern mit einem Linsenkopf verwendet. Mit steigenden Frequenz in der Datenübertragung (GHz-Bereich) muß die aktive Fläche der optischen Bauteile kleiner werden, um zu große Kapazitäten in denselben zu vermeiden. Solche Kapazitäten müssen möglichst klein sein, damit die erforderlichen elektrischen Umladungen mit einer ausreichend hohen Geschwindigkeit durchgeführt werden können. Die bisherige Technik zur Kopplung von Fasern und optischen Bauteilen ist für diese Anwendung wenig geeignet.In known arrangements that operate at relatively low frequencies or data rates, the fibers are positioned so that their core, which has a diameter of 9 μm, for example, lies with its end face as close as possible to the active face of the optical component. The relative position of fibers and active areas is not so critical if the optical component is a receiving diode because the active areas are sufficiently large. In addition, in particular in the case of optical components operating as transmitters, an optimal position is determined in each case active adjustment set. If the optical component is a transmitter, lenses are usually also installed between the active surfaces and the fibers or fibers with a lens head are used. With increasing frequency in the data transmission (GHz range), the active area of the optical components must be smaller in order to avoid excessive capacities in the same. Such capacities have to be as small as possible so that the necessary electrical recharges can be carried out at a sufficiently high speed. The previous technology for coupling fibers and optical components is not very suitable for this application.
Der Erfindung liegt die Aufgabe zugrunde, die eingangs geschilderte Anordnung so zu gestalten, daß eine optimale Kopplung zwischen der aktiven Fläche eines optischen Bauteils und einer optischen Faser auf einfache Weise erreicht werden kann.The invention has for its object to design the arrangement described above so that an optimal coupling between the active surface of an optical component and an optical fiber can be achieved in a simple manner.
Diese Aufgabe wird gemäß der Erfindung dadurch gelöst,According to the invention, this object is achieved by
— daß die optische Faser in einer geradlinigen Rinne eines aus einem Halbleitermaterial bestehenden, ebenen Trägers angeordnet ist, der auch das optische Bauteil trägt,That the optical fiber is arranged in a rectilinear groove of a flat carrier consisting of a semiconductor material, which also carries the optical component,
— daß die Rinne an einer Kante des Trägers beginnt und im Verlauf desselben an einer Stirnfläche endet,That the channel begins at an edge of the beam and ends at an end face in the course thereof,
— daß die Stirnfläche als Licht reflektierende, plane Spiegelfläche ausgebildet ist, die unter einem spitzen Winkel zur Achse der in der Rinne liegenden Faser verläuft, und- That the end face is designed as a light reflecting, flat mirror surface, which extends at an acute angle to the axis of the fiber lying in the groove, and
— daß das optische Bauteil mit seiner aktiven Fläche derart in unmittelbarer Nähe der Spiegelfläche positioniert ist, daß jeweils nach Reflexion an derselben von der Faser geführtes Licht auf die aktive Fläche fällt oder vom optischen Bauteil ausgehendes Licht in den Kern der Faser eingekoppelt wird.- That the optical component is positioned with its active surface in the immediate vicinity of the mirror surface, that after reflection on the same, light guided by the fiber falls on the active surface or light emanating from the optical component is coupled into the core of the fiber.
Rinnen zur Aufnahme einer optischen Faser lassen sich in dem aus Halbleitermaterial bestehenden Träger ebenso mit großer Genauigkeit herstellen, wie die optischen Fasern selbst. Das gilt auch für die in der fertigen Anordnung als Spiegelfläche ausgebildete Stirnfläche am Ende einer Rinne. Das optische Bauteil kann ebenfalls mit großer Genauigkeit so auf dem Träger positioniert werden, daß seine aktive Fläche lagerichtig in unmittelbarer Nähe der Spiegelfläche liegt. Von derselben reflektiertes Licht trifft somit auf kürzestem Wege auf die aktive Fläche des optischen Bauteils. Von demselben ausgehendes Licht wird auf kürzestem Wege in die Faser eingekoppelt.Troughs for receiving an optical fiber can be manufactured with great accuracy in the carrier made of semiconductor material, just like the optical fibers themselves. This also applies to the end face formed in the finished arrangement as a mirror surface at the end of a trough. The optical component can also be positioned with great accuracy on the carrier so that its active surface is in the correct position in the immediate vicinity of the mirror surface. Light reflected from the same thus strikes by the shortest route to the active surface of the optical component. Light emanating from the same is coupled into the fiber in the shortest possible way.
In bevorzugter Ausführungsform wird für den Träger ein Halbleitermaterial verwendet, auf dem mindestens eine weitere elektronische Schaltung angebracht ist.In a preferred embodiment, a semiconductor material is used for the carrier, on which at least one further electronic circuit is attached.
Ein Ausführungsbeispiel des Erfindungsgegenstandes ist in den Zeichnungen dargestellt.An embodiment of the subject of the invention is shown in the drawings.
Es zeigen:Show it:
Fig. 1 schematisch eine Schaltung zum Empfang optischer Signale.Fig. 1 shows schematically a circuit for receiving optical signals.
Fig. 2 ebenfalls schematisch ein optisches Bauteil.Fig. 2 also schematically shows an optical component.
Fig. 3 eine Anordnung nach der Erfindung ebenfalls in schematischer Darstellung.Fig. 3 shows an arrangement according to the invention also in a schematic representation.
Fig. 4 eine Stirnansicht der Anordnung nach Fig. 3.4 shows an end view of the arrangement according to FIG. 3.
Fig. 5 eine Einzelheit in vergrößerter Darstellung.Fig. 5 shows a detail in an enlarged view.
Fig. 6 eine gegenüber Fig. 5 andere Ausführungsform.FIG. 6 shows another embodiment compared to FIG. 5.
Fig. 7 eine weiter ergänzte Anordnung.Fig. 7 shows a further supplemented arrangement.
In der folgenden Beschreibung wird zunächst der Fall berücksichtigt, daß das Licht eines Signalstroms über eine optische Faser übertragen wird und auf ein dann als Empfänger ausgebildetes optisches Bauteil trifft. Statt der Worte „optisches Bauteil" wird daher der Einfachheit halber das Wort „Fotodiode" verwendet.The following description first takes into account the case where the light of a signal stream is transmitted via an optical fiber and strikes an optical component which is then designed as a receiver. Instead of the words "optical component", the word "photodiode" is therefore used for the sake of simplicity.
Die Empfangsschaltung nach Fig. 1 hat als Lichtempfänger eine Fotodiode 1 , beispielsweise eine PIN-Diode, auf weiche das Licht eines über eine optische Faser 2 übertragenen Signalstroms fällt. An die als opto/elektrischer Wandler arbeitende Fotodiode 1 ist ein Verstärker 3 für elektrische Signale angeschlossen, durch welchen die von der Fotodiode 1 gelieferten Signale in weiterverarbeitbare Signale verstärkt werden. Die für die Fotodiode 1 erforderliche Vorspannung ist mit UB bezeichnet. Die Fotodiode 1 besteht aus Halbleitermaterial, wie beispielsweise Gallium-Arsenid oder Indium- Phosphid. Auf dem Halbleitermaterial befinden sich eine aktive Fläche 4 sowie zwei elektrische Kontakte 5 und 6, an die beispielsweise der Verstärker 3 angeschlossen werden kann. Zur Herstellung einer aus der Fotodiode 1 und der optischen Faser 2 bestehenden Anordnung wird zunächst in einem ebenen, plattenförmigen Träger 7 aus Halbleitermaterial mindestens eine Rinne 8 erzeugt. Die Rinne 8 ist geradlinig und offen. Sie beginnt an einer Kante 9 des Trägers 7 und endet im Verlauf desselben an einer Stirnfläche 1 0. Die Stirnfläche 1 0 verläuft unter einem spitzen Winkel a zur Achse einer in der Rinne 8 befindlichen Faser 2. Der Winkel läßt sich als spitzer Winkel a beim Erzeugen der Rinne 8 als sogenannter V-Graben (V-groove) durch Ätzen durch die Orientierung der Kristalle des Halbleitermaterials des Trägers 7 einstellen, der beispielsweise aus Gallium-Arsenid oder Indium-Phosphid besteht. Die Stirnfläche 1 0 wird nach Fertigstellung der Rinne 8 verspiegelt. Dazu kann beispielsweise ein Metall auf die Stirnfläche 10 aufgedampft werden. Als Metall wird in bevorzugter Ausführungsform Gold verwendet. Auf die so erzeugte Spiegelfläche auftreffendes Licht wird von derselben reflektiert.1 has as a light receiver a photodiode 1, for example a PIN diode, onto which the light of a signal stream transmitted via an optical fiber 2 falls. An amplifier 3 for electrical signals is connected to the photodiode 1 operating as an opto / electrical converter, by means of which the signals supplied by the photodiode 1 are amplified into signals which can be processed further. The bias voltage required for photodiode 1 is denoted by U B. The photodiode 1 consists of semiconductor material, such as gallium arsenide or indium phosphide. An active surface 4 and two electrical contacts 5 and 6, to which the amplifier 3 can be connected, for example, are located on the semiconductor material. To produce an arrangement consisting of the photodiode 1 and the optical fiber 2, at least one groove 8 is first produced in a flat, plate-shaped carrier 7 made of semiconductor material. The gutter 8 is straight and open. It begins at an edge 9 of the carrier 7 and ends in the course of the same at an end face 1 0. The end face 1 0 runs at an acute angle a to the axis of a fiber 2 located in the groove 8. The angle can be as an acute angle a at Create the groove 8 as a so-called V-groove (V-groove) by etching through the orientation of the crystals of the semiconductor material of the carrier 7, which consists for example of gallium arsenide or indium phosphide. The end face 1 0 is mirrored after completion of the channel 8. For this purpose, for example, a metal can be evaporated onto the end face 10. In a preferred embodiment, gold is used as the metal. Light striking the mirror surface thus generated is reflected by the latter.
Die optische Faser 2 besteht entsprechend der Darstellung in Fig. 5 aus einem Licht leitenden Kern 1 1 , der beispielsweise einen Durchmesser von 9 μm hat, und aus einem den Kern 1 1 umgebenden Mantel 12, der einen Außendurchmesser von beispielsweise 125 μm hat. Kern 1 1 und Mantel 12 haben unterschiedliche Brechzahlen. Der Winkel a der Stirnfläche 1 0 wird zweckmäßig so gewählt, daß vom Kern 1 1 geführtes Licht nach Reflexion an der Spiegelfläche auf möglichst kurzem Wege aus der Faser 2 austritt und nach Möglichkeit nicht in den Kern 1 1 zurück reflektiert wird. Er liegt mit einer in diesem Sinne erforderlichen Abweichung zweckmäßig in der Nähe von 45°. Wenn das Ende der Faser 2 gemäß Fig. 6 in einer vorteilhaften Ausgestaltung „angespitzt" bzw. in axialer Richtung nach außen gewölbt wird, kann der Abstand zwischen der Spiegelfläche und dem Kern 1 1 der Faser 2 verkürzt werden, ohne daß die Reflexion an der Spiegelfläche behindert wird. Es kann dadurch erreicht werden, daß das zu übertragende Licht schärfer gebündelt wird.As shown in FIG. 5, the optical fiber 2 consists of a light-conducting core 1 1, which has a diameter of 9 μm, for example, and a jacket 12 surrounding the core 1 1, which has an outside diameter of, for example, 125 μm. Core 1 1 and jacket 12 have different refractive indices. The angle a of the end face 1 0 is expediently chosen such that light guided by the core 1 1 emerges from the fiber 2 in the shortest possible way after reflection on the mirror surface and is not reflected back into the core 1 1 if possible. With a deviation required in this sense, it is expediently in the vicinity of 45 °. If, in an advantageous embodiment, the end of the fiber 2 according to FIG. 6 is “sharpened” or arched outward in the axial direction, the distance between the mirror surface and the core 11 of the fiber 2 can be shortened without the reflection on the It can be achieved that the light to be transmitted is focused more sharply.
Die im Träger 7 angebrachte Rinne 8 ist beispielsweise V-förmig ausgebildet. Sie ist vorzugsweise genau auf die Abmessungen der Faser 2 abgestimmt, so daß dieselbe exakt im Träger 7 geführt ist. Die Faser 2 ist zweckmäßig so in der Rinne 8 angebracht, daß. sie knapp unter der Oberfläche des Trägers 7 liegt. Sie kann dann in Längsrichtung der Rinne 8 in dieselbe eingeschoben werden, ohne von der eventuell bereits montierten Fotodiode 1 behindert zu werden. In der Endposition liegt die Faser 2 dann möglichst dicht an der Spiegelfläche und knapp unter der Fotodiode 1 . Diese ist in der fertigen Anordnung auf dem Träger 7 so positioniert, daß ihre aktive Fläche 4 an der Stelle liegt, an der das von der Stirnfläche 1 0 reflektierte Licht autrifft.The groove 8 attached in the carrier 7 is, for example, V-shaped. It is preferably precisely matched to the dimensions of the fiber 2 so that it is guided exactly in the carrier 7. The fiber 2 is appropriately attached in the groove 8 that . it is just below the surface of the carrier 7. It can then be inserted into the groove 8 in the longitudinal direction thereof, without the possibly already installed one Photodiode 1 to be hindered. In the end position, the fiber 2 then lies as close as possible to the mirror surface and just below the photodiode 1. This is positioned in the finished arrangement on the carrier 7 so that its active surface 4 lies at the point at which the light reflected by the end surface 1 0 strikes.
Der aus Halbleitermaterial bestehende Träger 7 kann mit einer durch gestrichelte Linien angedeuteten elektronischen Schaltung 1 3 versehen sein, bei der es sich mit Vorteil um einen Verstärker handelt. Auf dem Träger 7 können auch noch weitere elektronische Schaltungen angebracht sein. Die Fotodiode 1 ist mit ihrer aktiven Fläche 4 über der reflektierenden Spiegelfläche des Trägers 7 positioniert. Ihre Kontakte 5 und ό sind auf kürzestem Wege mit korrespondierenden Kontakten der Schaltung 13 verbunden. Solch kurze, elektrisch leitende Verbindungen können bei dem Träger 7 aus Halbleitermaterial auch zu und zwischen anderen elektronischen Schaltungen desselben eingesetzt werden. Eine Störung oder Verzerrung bei der Übertragung von Signalen durch die leitenden Verbindungen kann damit weitestgehend ausgeschlossen werden.The carrier 7 consisting of semiconductor material can be provided with an electronic circuit 13 indicated by dashed lines, which is advantageously an amplifier. Further electronic circuits can also be attached to the carrier 7. The photodiode 1 is positioned with its active surface 4 above the reflecting mirror surface of the carrier 7. Their contacts 5 and ό are connected in the shortest possible way to corresponding contacts of the circuit 13. Such short, electrically conductive connections can also be used in the carrier 7 made of semiconductor material to and between other electronic circuits of the same. A disturbance or distortion in the transmission of signals by the conductive connections can be largely excluded.
Im vorangehenden ist die Anordnung für die Übertragungsrichtung von Signalströmen von der optischen Faser 2 zur Fotodiode 1 beschrieben. Die Anordnung ist auch für die entgegengesetzte Übertragungsrichtung einsetzbar. Statt der Fotodiode 1 als Empfänger wird dann als optisches Bauteil ein Sender eingesetzt. Ein geeigneter Sender ist beispielsweise eine Laserdiode. The arrangement for the direction of transmission of signal currents from the optical fiber 2 to the photodiode 1 is described above. The arrangement can also be used for the opposite direction of transmission. Instead of the photodiode 1 as a receiver, a transmitter is then used as the optical component. A suitable transmitter is, for example, a laser diode.

Claims

Patentansprüche claims
1 . Anordnung zur Positionierung einer optischen Faser relativ zu einem mit einer aktiven Fläche ausgerüsteten optischen Bauteil, mit welcher Licht von der einen Licht leitenden Kern und einen denselben umgebenden Mantel aufweisenden Faser auf das Bauteil übertragen oder von dem Bauteil in die Faser eingekoppelt wird, dadurch gekennzeichnet,1 . Arrangement for positioning an optical fiber relative to an optical component equipped with an active surface, with which light is transmitted from the light-conducting core and a fiber surrounding the same to the component or is coupled into the fiber by the component, characterized in that
— daß die optische Faser (2) in einer geradlinigen Rinne (8) eines aus Halbleitermaterial bestehenden, ebenen Trägers (7) angeordnet ist, der auch das optische Bauteil (1 ) trägt,- That the optical fiber (2) is arranged in a rectilinear groove (8) of a flat carrier (7) consisting of semiconductor material, which also carries the optical component (1),
— daß die Rinne (8) an einer Kante (9) des Trägers (7) beginnt und im Verlauf desselben an einer Stirnfläche (1 0) endet,- That the groove (8) begins on an edge (9) of the carrier (7) and ends in the course of the same on an end face (1 0),
— daß die Stirnfläche (1 0) als Licht reflektierende, plane Spiegelfläche ausgebildet ist, die unter einem spitzen Winkel (a) zur Achse der in der Rinne (8) liegenden Faser (2) verläuft, und- That the end face (1 0) is designed as a light-reflecting, flat mirror surface which extends at an acute angle (a) to the axis of the fiber (2) lying in the groove (8), and
— daß das optische Bauteil(l ) mit seiner aktiven Fläche (4) derart in unmittelbarer Nähe der Spiegelfläche positioniert ist, daß jeweils nach Reflexion an derselben von der Faser (2) geführtes Licht auf die aktive Fläche (4) fällt oder vom optischen Bauteil (1 ) ausgehendes Licht in den Kern (1 1 ) der Faser (2) eingekoppelt wird.- That the optical component (l) with its active surface (4) is positioned in the immediate vicinity of the mirror surface, that after reflection on the same by the fiber (2) guided light falls on the active surface (4) or from the optical component (1) outgoing light is coupled into the core (1 1) of the fiber (2).
2. Anordnung nach Anspruch 1 , dadurch gekennzeichnet, daß die Spiegelfläche derart unter einem in der Nähe von 45° zur Achse der Faser (2) liegenden Winkel (a) angeordnet ist, daß von der Faser (2) geführtes Licht nicht in dieselbe zurück reflektiert wird. 2. Arrangement according to claim 1, characterized in that the mirror surface is arranged at an angle (a) lying near 45 ° to the axis of the fiber (2) in such a way that light guided by the fiber (2) does not return into the same is reflected.
3. Anordnung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Träger (7) mindestens eine weitere elektronische Schaltung (1 3) aufweist, an welche das optische Bauteil (1 ) elektrisch leitend angeschlossen ist.3. Arrangement according to claim 1 or 2, characterized in that the carrier (7) has at least one further electronic circuit (1 3), to which the optical component (1) is electrically conductively connected.
4. Anordnung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß das stirnseitige Ende der Faser (2) angespitzt bzw. in axialer Richtung nach außen gewölbt ist. 4. Arrangement according to one of claims 1 to 3, characterized in that the end face of the fiber (2) is pointed or arched outward in the axial direction.
PCT/EP2002/006704 2001-06-30 2002-06-18 Device for positioning an optical fibre WO2003005090A1 (en)

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EP02762291A EP1402301A1 (en) 2001-06-30 2002-06-18 Device for positioning an optical fibre

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DE10131868.5 2001-06-30
DE2001131868 DE10131868A1 (en) 2001-06-30 2001-06-30 Arrangement for positioning an optical fiber

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US7576037B2 (en) 2005-11-18 2009-08-18 Mei Technologies, Inc. Process and apparatus for combinatorial synthesis

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EP0987769A2 (en) * 1998-09-18 2000-03-22 Sumitomo Electric Industries, Ltd. Photodiode module
US6115521A (en) * 1998-05-07 2000-09-05 Trw Inc. Fiber/waveguide-mirror-lens alignment device
US6132107A (en) * 1996-09-30 2000-10-17 Nec Corporation Light-receiving module and method for fabricating a same

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US6132107A (en) * 1996-09-30 2000-10-17 Nec Corporation Light-receiving module and method for fabricating a same
US6115521A (en) * 1998-05-07 2000-09-05 Trw Inc. Fiber/waveguide-mirror-lens alignment device
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Publication number Priority date Publication date Assignee Title
US7576037B2 (en) 2005-11-18 2009-08-18 Mei Technologies, Inc. Process and apparatus for combinatorial synthesis

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EP1402301A1 (en) 2004-03-31

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