EP2220526A1 - Dispositif de couplage de guides d'ondes optiques - Google Patents

Dispositif de couplage de guides d'ondes optiques

Info

Publication number
EP2220526A1
EP2220526A1 EP08859049A EP08859049A EP2220526A1 EP 2220526 A1 EP2220526 A1 EP 2220526A1 EP 08859049 A EP08859049 A EP 08859049A EP 08859049 A EP08859049 A EP 08859049A EP 2220526 A1 EP2220526 A1 EP 2220526A1
Authority
EP
European Patent Office
Prior art keywords
coupling device
optical
coupling
light
optical waveguides
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Withdrawn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
EP08859049A
Other languages
German (de)
English (en)
Inventor
Klaus Hartkorn
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.)
Corning Research and Development Corp
Original Assignee
CCS Technology Inc
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 CCS Technology Inc filed Critical CCS Technology Inc
Publication of EP2220526A1 publication Critical patent/EP2220526A1/fr
Withdrawn legal-status Critical Current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
    • G02B6/26—Optical coupling means
    • G02B6/32—Optical coupling means having lens focusing means positioned between opposed fibre ends
    • G02B6/322—Optical coupling means having lens focusing means positioned between opposed fibre ends and having centering means being part of the lens for the self-positioning of the lightguide at the focal point, e.g. holes, wells, indents, nibs
    • 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
    • G02B6/264—Optical coupling means with optical elements between opposed fibre ends which perform a function other than beam splitting
    • 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
    • G02B6/34—Optical coupling means utilising prism or grating
    • 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
    • G02B6/30—Optical coupling means for use between fibre and thin-film device

Definitions

  • the invention relates to a coupling device for coupling optical waveguides, for example a coupling device, with which optical waveguides which are arranged on an optical chip are coupled to optical waveguides of a fiber ribbon.
  • a plurality of optical fibers are arranged side by side.
  • the spacing (pitch) of the individual optical waveguides of the fiber ribbon can be, for example, 250 ⁇ m.
  • the optical fibers of the fiber ribbon are generally connected to a device for processing optical signals transmitted via the optical fibers or to a conversion device for converting optical signals into electrical signals.
  • Such devices for optical signal processing can be arranged on a chip.
  • a plurality of optical waveguides are mounted on the chip.
  • a coupling device is used, wherein the optical fibers are arranged on the chip in the same spatial arrangement, in particular at the same distance from each other, as the optical fibers of the fiber ribbon.
  • the optical waveguides on the chip are therefore due to the distance of the optical waveguide of the fiber ribbon, for example, even if arranged at a distance of 250 microns on a substrate of the chip. Due to the large distance between the optical waveguides on the chip, valuable chip area is generally lost.
  • such a coupling device for coupling optical waveguides, in particular of optical waveguides of a fiber ribbon, to optical waveguides, which are arranged on a substrate of a chip specified.
  • the coupling device makes it possible, in particular, to couple the optical waveguides of the fiber ribbon to optical waveguides which are arranged on the substrate of the chip at a smaller distance than the optical waveguides of the fiber ribbon.
  • An embodiment of the coupling device for coupling optical waveguides comprises a first side for coupling first optical waveguides to the coupling device and a second side for coupling second optical waveguides to the coupling device.
  • the first optical waveguides are arranged on the first side of the coupling device relative to one another spatially differently than the second optical waveguide on the second side of the coupling device.
  • the coupling device further comprises an optical system which is connected between the first and second sides of the coupling is arranged device.
  • the optical system alters a beam path of light coupled out of the first optical waveguide and coupled into the coupling device on the first side such that the light on the second side is coupled out of the coupling device and coupled into the second optical waveguide.
  • the changing of the beam path is effected by a refraction of light on the optical system, wherein the refraction of light is dependent on an impingement of the radiation on the optical system.
  • the optical system may include a lens.
  • the lens may be formed, for example, as a converging lens.
  • the coupling device can furthermore comprise further lenses, which are arranged between the lens and the second optical waveguides.
  • Each of the further lenses is in each case assigned to one of the second optical waveguides in order to couple the light emitted by the lens into the one of the second optical waveguides assigned to the respective one of the second lenses.
  • the further lenses can be arranged in the coupling device between the lens and one of the first and second sides of the coupling device.
  • the optical system may also include a spherical lens.
  • the optical system may, for example, comprise optical elements each containing optical waveguides.
  • the respective optical fibers of the optical elements are coupled to the first or second optical fibers.
  • the optical elements are each formed on a side facing the spherical lens as a spherical half-shell.
  • the optical system can output the beam path of the first optical waveguides arranged in a plane. - A -
  • th light change such that the light is emitted at the second side of the coupling device and coupled into the arranged in different planes second optical waveguide.
  • the optical system may for example contain a plurality of plane-parallel plates.
  • the plurality of plane-parallel plates may each be assigned to one of the first and second optical waveguides in order to change the beam path of the light coupled out of one of the first optical waveguides and coupled into the coupling device on the first side in such a way that the light on the second side emitted from the coupling device and coupled into one of the second optical waveguide.
  • the plurality of plane-parallel plates may be arranged in an alternating direction with respect to each other.
  • the optical system may further include a plurality of prisms.
  • one of the prisms can be assigned to one of the first optical waveguides on the first side of the coupling device.
  • Another of the prisms may be assigned to one of the second optical waveguides on the second side of the coupling device.
  • the one of the prisms can be oriented in such a way that the light emerging from the one of the first light waveguides is irradiated on the first side of the coupling device into the one of the prisms and is directed onto the further one of the prisms.
  • the further of the first prisms can be oriented such that the light directed onto the further one of the prisms is emitted on the second side of the coupling device and coupled into one of the second optical waveguides.
  • the coupling device may include a guide pin that protrudes from the coupling device on one of the first and second sides for attaching the coupling device to a component that contains the first and second optical waveguides.
  • the coupling device may further include a cavity adapted to receive a guide pin of a device including the first and second optical fibers to secure the coupling device to the device.
  • the other lenses may be attached to the guide pin.
  • the first optical waveguides can be arranged on a first component.
  • the second optical waveguides can be arranged on a second component.
  • the first optical waveguides can be arranged on the first component at a different distance from one another than the second optical waveguides are arranged on the second component.
  • the first optical waveguides can be arranged on a first component and the second optical waveguides can be arranged on a second component.
  • the first optical waveguides are arranged on the first component in a plane.
  • the second optical waveguides are arranged on the second component in different planes.
  • At least one of the first and second components may be formed, for example, as an optical chip. At least one of the first and second components can also be designed as a ferrule, for example.
  • a system for coupling optical waveguides comprises a first component comprising first optical waveguides and a second component comprising second optical waveguide.
  • the system further comprises a coupling device having a first side, at which the first component is coupled to the coupling device, and a second side, at which the second component is coupled to the coupling device.
  • the first optical waveguides are spatially differently arranged in the first component on the first side of the coupling device relative to one another than the second optical waveguides are arranged in the second component on the second side of the coupling device.
  • the coupling device further comprises an optical system.
  • the optical system alters a beam path of light coupled out of the first optical waveguides and coupled into the coupling device on the first side such that the light is decoupled from the coupling device at the second side and coupled into the second optical waveguide.
  • the changing of the beam path is effected by a refraction of light on the optical system, wherein the refraction of light is dependent on the impingement of the beam path on the optical system.
  • the optical system may include a lens, such as a condenser lens.
  • the system may also include other lenses disposed between the lens and the second optical fibers.
  • Each of the further lenses is in each case assigned to one of the second optical waveguides in order to couple the light emitted by the lens into the one of the second optical waveguides assigned to the respective one of the second lenses.
  • the optical system may include a plurality of plane-parallel plates. The plurality of plane-parallel plates may be arranged to each other in an alternating direction.
  • a method for coupling optical waveguides provides for using a coupling device, wherein first optical waveguides are spatially arranged differently on a first side of the coupling device relative to each other, as second optical waveguides are spatially arranged on a second side of the coupling device.
  • the method further provides the coupling out of light from the first optical waveguides.
  • the decoupled light is coupled into the coupling device.
  • a beam path of the light coupled into the coupling device is changed by means of an optical system such that the light coupled out of the coupling device is coupled into second optical waveguide. In this case, the beam path of the light is changed by a refraction of light at the optical system, wherein the refraction of light is changed depending on the impact of the beam path on the optical system.
  • the first optical waveguides on the first side of the coupling device can be arranged at a different distance from one another than the second optical waveguides on the second side of the coupling device.
  • the first optical waveguides can be arranged on the first side of the coupling device in a plane.
  • the second optical fibers can on the second side of the
  • Coupling device can be arranged in different levels.
  • FIG. 1 shows an embodiment of a coupling device for coupling optical waveguides, which have different distances from each other,
  • FIG. 2 shows a further embodiment of a coupling device for coupling optical waveguides, which each have different distances from each other,
  • FIG. 3 shows a further embodiment of a coupling device for coupling optical waveguides which have different distances from each other
  • FIG. 4 shows a further embodiment of a coupling device for coupling optical waveguides which have different distances from each other
  • FIG. 5 shows an arrangement of optical waveguides of a fiber ribbon and of optical waveguides of a chip, which are arranged in different spatial planes relative to one another,
  • FIG. 6 shows an embodiment of a coupling device for coupling optical waveguides, which are arranged spatially in different planes,
  • Figure 7 shows an embodiment of an optical system for
  • FIG. 8 shows a further embodiment of an optical system for coupling optical waveguides, which are arranged spatially in different planes.
  • FIG. 1 shows an embodiment of a coupling device 1 for coupling optical waveguide L1 to optical waveguide L2.
  • the optical waveguides L1 are arranged, for example, on a component 100 at a spacing (pitch) P1 relative to one another.
  • the device 100 may be an optical chip, wherein the optical waveguide Ll are embedded in a substrate 101 of the optical chip.
  • devices for signal processing of the light transmitted via the optical waveguide L1 are arranged on the optical chip 100.
  • optical transmitting or receiving devices or also optoelectric conversion devices for converting optical signals into electrical signals and for converting electrical signals into optical signals can be arranged on the optical chip 100.
  • optical waveguides L2 are arranged at a pitch P2 relative to one another.
  • the optical waveguides L2 are arranged, for example, as fiber ribbons.
  • the component 200 may be a ferrule, wherein the optical waveguide L2 are inserted in grooves of the ferrule.
  • the ferrule may be, for example, an MT ferrule.
  • the distance P2, with which the optical waveguides L2 are arranged in the ferrule 200 spatially to each other, is greater than the distance Pl, which have attached to the optical chip 100 optical waveguide Ll to each other.
  • a coupling device 1 is arranged between the components 100 and 200.
  • the coupling device 1 has an optical system 10, with which it is possible to couple light which is coupled out of one of the optical waveguide Ll in an optical waveguide L2 associated with the optical waveguide L1.
  • An optical path of the light, which is coupled into the coupling device 1 by one of the optical waveguides L1 is focused onto one of the optical waveguides L2 by a refraction of light on the optical system.
  • the light can be transmitted between the optical waveguides L1 and the optical system 10 and between the optical system 10 and the optical waveguides L2 by a free space propagation, wherein the transmission medium is, for example, air.
  • the refraction of light takes place as a function of the impact of the beam path on the optical system.
  • the refraction of light depends, for example, on the direction or angle at which the light impinges on the optical system 10.
  • the optical system may, for example, have a curved surface.
  • the curvature of the surface of the optical system 10 is selected such that the optical path of the light, which is radiated by the optical waveguides Ll in the coupling device is changed so that the light emerging from the optical system is coupled into the optical waveguide L2.
  • the thickness of the optical system and the distance of the optical system 10 between the optical waveguides L1 on an input side of the coupling device and the optical waveguides L2 on the output side of the coupling device can be selected such that the Optical fibers Ll coupled light is coupled into the optical waveguide L2.
  • the light waveguide Ll and the light waveguide L2 can be arranged spatially different from each other.
  • the optical waveguides L1 and L2 can in particular be arranged at a different distance from each other.
  • the optical system 10 may include a lens 11, such as a condenser lens.
  • the lens 11 is arranged in the coupling device 1 such that light which is coupled out of one of the optical waveguides L1 and irradiated on one side S1 of the coupling device 1 into the coupling device is radiated by the lens 11 on a side S2 of the coupling device out of the coupling device and is coupled into the light waveguide L2 associated with the optical waveguide L1.
  • optical fibers arranged on different sides of the lens 11 at different distances can be coupled to each other.
  • optical waveguides L1 which are arranged on the side S1 of the coupling device on the optical chip 100 at a distance of 30 .mu.m, can be coupled to optical waveguides L2, which on the side S2 of the coupling device take the form of a Fiber ribbons are arranged at a distance of 250 microns to each other.
  • the coupling device 1 For the mechanical coupling of the coupling device 1 to the component 100 or to the component 200, the coupling device 1 contains guide pins 50 which protrude from the coupling device on the side S1 or S2. The guide pins 50 are inserted into cavities 60 of the components 100, 200. When the optical waveguides L1 on the chip 100 and the optical waveguides L2 in the ferrule 200 with respect to the cavities 60 are aligned, light coupled out of one of the optical waveguides L1 is coupled into the optical waveguide L2 associated with the optical waveguide L1. In the embodiment shown in Figure 1, the input and output sides of the coupling device are interchangeable.
  • light which is coupled out of one of the optical waveguides L2 can be irradiated on the side S2 into the coupling device 1 and radiated by the optical system 10 on the side S1 and coupled into the optical waveguide L1 associated with the optical waveguide L2.
  • the length and width of the coupling device 1 is dependent on the number of optical waveguides to be coupled, the distance between the optical waveguides to each other and the numerical aperture of the optical waveguide.
  • a pitch of the optical fibers of 50 microns on an input side of the coupling device and a distance of further optical fibers on an output side of the coupling device of 127 microns about 100 optical fibers can be coupled by a coupling device with a length of 30 mm to each other when the Optical waveguide on the input and output side each have a numerical aperture of 0.15.
  • FIG. 2 shows a further embodiment of a coupling device 1, in which the optical system 10 has additional lenses 12 in addition to the lens 11.
  • the lenses 12 are each assigned to one of the optical waveguides L2. With the embodiment shown in Figure 2 losses in the coupling of the optical waveguide Ll with the optical waveguides L2 are largely avoided.
  • the light incident on one of the lenses 12 from the lens 11 is re-focused by the lens 12 and projected onto the optical fiber L2 associated with the respective lens 12.
  • the further lenses 12 are integrated in a housing 70 of the coupling device 1.
  • the further lenses 12 are arranged outside the housing 70.
  • the lenses may, for example, be designed as a component, with the lenses being connected to one another.
  • the arrangement of the lenses 12 may have eyelets 13 at their ends. For attachment of the lenses 12 on one of the sides Sl and S2 of the coupling device, the eyes 13 are pushed onto the guide pins 50.
  • the optical waveguides L1 and L2 generally have different emission / acceptance angles, which depend on the respective index profile of the optical waveguides L1 and L2.
  • power losses attributable to the different emission / acceptance angles of the optical waveguides L1 and L2 are avoided by arranging lenses 12 on at least one of the sides S1 or S2.
  • Lenses 12, which are connected upstream of the optical waveguides can be used in particular if the ratios of the emission angles of the optical waveguides L1 and L2 do not correspond to the ratio of the distance differences between the optical waveguides L1 and L2.
  • power losses are avoided by the lenses 12, for example, when the lens 11 is enlarged in a different ratio than the ratio of the angles of emission of the optical waveguides L1 and L2 relative to one another.
  • the lenses 12 are designed as discrete components, it is possible for the lenses 12 to be inserted into the ends of the optical waveguides L1 and L2. tegrieren.
  • the lenses 12 can be integrated into the optical waveguides, for example, by rounding the fiber ends of the optical waveguides L1 or L2.
  • FIG. 4 shows a further embodiment of a coupling device 2.
  • the component 100 optical waveguides L1 are arranged at a smaller distance from one another than optical waveguides L2 in which the device 200 is arranged.
  • the component 100 may be, for example, an optical chip, wherein the optical waveguide Ll with optical assemblies, for example, with on-chip transmitting or receiving devices are connected.
  • the component 200 may be a ferrule, for example an MT ferrule, in which the optical waveguides L2 having a diameter of 125 ⁇ m, for example, are arranged at a distance P2 of 250 ⁇ m from each other.
  • the coupling device 2 is provided for coupling the optical waveguide Ll with the optical waveguides L2.
  • the coupling device 2 is mechanically coupled to the components 100 and 200 via guide pins 50, which engage in cavities 60 of the components 100 and 200, respectively.
  • the coupling device 2 comprises an optical system 20 comprising a spherical lens 21 and optical elements 22a and 22b.
  • the optical elements 22a and 22b are each formed on a spherical lens 21 facing side S22a, S22b as Halbkugelschalen.
  • the magnification factor of the lens arrangement of the optical system 20 is formed by the ratio of the different radii of the hemispherical shells 22a and 22b.
  • the optical elements 22a and 22b respectively have optical fibers 23a and 23b coupled to the optical fibers L1 and L2.
  • the optical waveguides 23a and 23b are each in the region of the hemispherical Side S22a and S22b of the optical elements 22a and 22b aligned with the center of the spherical lens 21. Since each light beam passes through the center of the lens 21, in this embodiment, the diameter of the lens 21 is independent of the number of optical fibers to be coupled.
  • FIG. 5 shows a different spatial arrangement of optical waveguides L1 and L2.
  • the optical waveguides L1 are arranged, for example, on a substrate of an optical chip in a plane El.
  • the optical waveguides L2 can be, for example, optical waveguides of a fiber ribbon, which are arranged in a ferrule, for example, in two layers in planes E2 and E3.
  • the ferrule may, for example, be an MT ferrule formed with correspondingly two-layered grooves.
  • FIG. 6 shows an embodiment of a coupling device 3 with which it is possible to couple light which is decoupled from the optical waveguides L1 into the optical waveguides L2 which are arranged in different planes as shown in FIG.
  • the coupling device 3 is arranged between a component 100 and a component 200.
  • the component 100 may be formed, for example, as an optical chip, are arranged on the optical fiber Ll in a plane El adjacent to each other.
  • the optical fibers L2 are arranged in different planes E2 and E3.
  • the coupling device 3 is fastened to the components 100, 200 by guide pins 50 which are inserted into cavities 60 of the components 100, 200.
  • the coupling device 3 contains an optical system 30 which contains plane-parallel plates 31a, 31b corresponding to the number of optical waveguides L1, L2 to be coupled. Each pair of optical fibers Ll, L2 is assigned to one of the plane-parallel plates.
  • the plane-parallel plates 31 a, 31 b are arranged alternately with respect to their alignment in a row along the sides Sl and S2 of the coupling device 3. The alternating arrangement of the plane-parallel plates makes it possible to couple light, which is coupled out of the optical waveguides L1, into the optical waveguide L2 arranged in different planes E2 and E3.
  • Figure 7 shows the arrangement of a plane-parallel plate 31a, which is associated with an optical fiber pair Ll, L2.
  • the light beam coupled out of the optical waveguide L1 is irradiated into the coupling device on one side Sl of the coupling device 3.
  • the light beam strikes one side of the plane-parallel plate 31a and is deflected downwardly within the plane-parallel plate. After emerging from the plane-parallel plate, the light beam at the
  • Plate 31b is introduced, which is aligned in the opposite direction with respect to the plane-parallel plate 31a shown in Figure 7.
  • optical fibers Ll For coupling optical fibers Ll with Therefore, as shown in Fig. 6, optical fibers L2 arranged in different planes are alternately arranged in plane-parallel plates 31a and 31b with respect to their orientation.
  • the centers of the optical waveguides can be offset
  • the offset V results in the case of a thickness d of the plane-parallel plate, a refractive index n and a helix angle ⁇ of the plane-parallel plate
  • Plates of silicon which have a helix angle of 45 °, results in a thickness d of the plane-parallel plate of about 97 microns.
  • FIG. 8 shows a further embodiment of a coupling device 4 for coupling light from optical waveguides L1 and for coupling the light into optical waveguides L2, which are arranged in different planes E2 and E3.
  • an optical system 40 is used in the coupling device 4, which contains prisms 41a and 41b.
  • a prism 41a is attached to the side S1 of the coupling device 4 and assigned to one of the optical waveguides L1.
  • a prism 41b oriented in the opposite direction to the prism 41a is arranged.
  • each optical waveguide L2 is also assigned to one of the prisms 41b on the side S2.
  • the distance between the prisms can be variably selected. This makes it possible to remove the planes E2 and E3 far from each other, whereby the widening of the light cone between the prisms 41a and 41b is small.
  • one of the coupling devices 1, 2, 3 or 4 makes it possible to couple together optical waveguides L1, which are arranged spatially differently on an optical chip 100, for example, than optical waveguides L2, which are connected as fiber ribbons to the chip. It In particular, it is possible to couple optical waveguides which are arranged in a ferrule, for example an MT ferrule, to optical waveguides which are embedded in a substrate of an optical chip and have a smaller spacing than the optical waveguides of the fiber band.
  • lens systems 10, 20, 30 and 40 are provided, which may be formed of silicon, which is transparent in the light transmitted through the optical waveguides Ll and L2.
  • the coupling devices 1, 2, 3 and 4 are suitable, for example, for the coupling of optical waveguides in optical backplane designs.

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

Abstract

Un dispositif de couplage de guides d'ondes optiques comprend un premier côté (S1) pour le couplage de premiers guides d'ondes optiques (L1) au dispositif de couplage (1, 2, 3, 4), un second côté (S2) pour le couplage de seconds guides d'ondes optiques (L2) au dispositif de couplage (1, 2, 3, 4) ainsi qu'un système optique (10, 20, 30, 40), placé entre le premier et le second côté (S1, S2) du dispositif de couplage. Le système optique (10, 20, 30, 40) modifie un trajet optique de la lumière sortant des premiers guides d'ondes optiques (L1) et entrant dans le dispositif de couplage par le premier côté (S1), de sorte que la lumière sorte du dispositif de couplage par le second côté (S2) et entre dans les seconds guides d'ondes optiques (L2), les premiers guides d'ondes optiques (L1) étant placés spatialement les uns par rapport aux autres d'une manière différente que les seconds guides d'ondes optiques (L2).
EP08859049A 2007-12-13 2008-12-04 Dispositif de couplage de guides d'ondes optiques Withdrawn EP2220526A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202007017386U DE202007017386U1 (de) 2007-12-13 2007-12-13 Kopplungseinrichtung zum Koppeln von Lichtwellenleitern
PCT/EP2008/066816 WO2009074508A1 (fr) 2007-12-13 2008-12-04 Dispositif de couplage de guides d'ondes optiques

Publications (1)

Publication Number Publication Date
EP2220526A1 true EP2220526A1 (fr) 2010-08-25

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EP08859049A Withdrawn EP2220526A1 (fr) 2007-12-13 2008-12-04 Dispositif de couplage de guides d'ondes optiques

Country Status (6)

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US (1) US20100247038A1 (fr)
EP (1) EP2220526A1 (fr)
CN (1) CN101971066B (fr)
AU (1) AU2008334726A1 (fr)
DE (1) DE202007017386U1 (fr)
WO (1) WO2009074508A1 (fr)

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CN101971066A (zh) 2011-02-09
CN101971066B (zh) 2014-10-08
US20100247038A1 (en) 2010-09-30
DE202007017386U1 (de) 2008-02-28
WO2009074508A1 (fr) 2009-06-18

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