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
  • G02B6/255—Splicing of light guides, e.g. by fusion or bonding
  • G02B6/2558—Reinforcement of splice joint
• • 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
  • G02B6/245—Removing protective coverings of light guides before coupling

Definitions

• the present invention relates to a splice connection between two optical fibers, each having a fiber core and a fiber cladding adjacent thereto. Furthermore, the present invention relates to a method for producing such a splice connection.
• the high energy input occurring during the splicing process in the region of the ends to be spliced can lead to a change in the guiding properties of the fibers, so that, for example, a decoupling of part of the guided radiation in this region occurs in an undesired manner.
• an unacceptably high thermal load of the fiber cladding which is often formed as a protective polymer shell occur.
• the radiation coupled out of the inner signal core can propagate in the pump core over long distances. For achieving a desired beam quality, however, it is often necessary that only radiation from the inner signal core emerges at the end of the entire fiber path, so that the radiation conducted in the pump core degrades the beam quality.
• the object is achieved by a splice connection between two optical fibers, each having a fiber core and a fiber cladding adjacent thereto, in at least a first of the two fibers of the fiber cladding in a connection region extending from the spliced end of the respective fiber in the fiber longitudinal direction extends along a predetermined length, is completely removed, and in which a support sleeve is provided, in which the spliced ends of the two fibers are arranged and which extends at least along the entire connection region of the first fiber and beyond the fiber cladding of the first fiber, wherein the support sleeve with its over the fiber cladding of the first fiber extending portion does not abut the fiber cladding of the first fiber and is mechanically connected in the connecting region of the first fiber directly or via an intermediate
• the support sleeve By mechanical contact of the support sleeve with the fiber core of the first fiber, mechanical stabilization of the splice can be achieved so as to prevent unwanted bending of the fiber core of the first fiber.
• the support sleeve may further protect the splice connection from contamination as it extends over the cladding of the first fiber.
• the fiber cladding is not thermally stressed in the formation of the splice, since the support sleeve is not applied to the fiber cladding itself and must not be connected to this.
• Under jacket of the optical fiber is here in particular the part of the fiber referred to, which is not thermally resilient and therefore removed before splicing of the fiber ends of the fiber.
• the jacket according to the invention is therefore in particular the protective jacket of the optical fiber.
• the core of the fiber is here in particular the remaining part of the fiber.
• the fiber core is used in particular for guiding light, wherein it can be constructed differently in order to achieve the desired guidance function for the light. It typically comprises the signal carrying core (e.g., glass material) and the surrounding cladding of glass material, which ensures the guidance of the light in the signal core.
• the jacket represents the so-called pump core, in which so-called pump light is guided in this core.
• the fiber core is in particular the part of the optical fiber which remains when the protective jacket is removed, this fiber core typically consisting of glass materials of different doping, possibly also with enclosed cavities.
• a single-core fiber here are the core of the single-core fiber and the sheath of the single-core fiber of the fiber core according to the invention and the sheath is the protective sheath of the single-core fiber in the context of the invention.
• the core and the so-called cladding form the core in the sense of the invention and the sheath of the double-core fiber is the sheath in the sense of the invention.
• the cladding should be removed.
• cladding and sheath of the double-core fiber form the sheath in the sense of the invention
• the core of the double-core fiber is the core in the sense of the invention.
• the fiber core is the part of the fiber which is e.g. made of glass and is intended to cause the light or electromagnetic radiation.
• electromagnetic radiation of the visible spectrum (eg 380 nm to 780 nm) and of the adjacent infrared electromagnetic spectrum (780 nm to 2500 nm).
• the support sleeve is preferably designed as a rigid or rigid support sleeve, which provides the desired protection against bending and buckling.
• the support sleeve may be made of the same material as the fiber core.
• the support sleeve can be made of quartz glass.
• the mechanical connection between the support sleeve and intermediate sleeve or fiber core is in particular a form-fitting and / or material connection. The same applies to the connection of the intermediate sleeve with the fiber core.
• the mechanical connection can be made in particular by a local heat input.
• a local heat input for this purpose, in particular laser radiation can be used, so that the support sleeve or the intermediate sleeve is melted onto the fiber core.
• the section of the support sleeve extending over the fiber cladding of the first fiber can not be mechanically connected to the fiber cladding except for a possibly provided end-side seal.
• the front-side seal can in particular be made of the same material as the material of the fiber cladding (eg polymer material).
• the support sleeve may have an inner diameter in the region in which the mechanical connection is present, which is smaller than the inner diameter of the over the fiber cladding of the first fiber extending portion.
• the support sleeve may have a varying inner diameter.
• the wall thickness of the support sleeve is constant. However, it can also vary along its longitudinal direction.
• the support sleeve in both fibers the fiber cladding can be completely removed in the respective connection region, the support sleeve can extend along the entire connection region of the second fiber as well as beyond the fiber cladding of the second fiber, wherein the support sleeve with its extends over the fiber cladding of the second fiber Fiber extending portion does not abut the fiber cladding of the second fiber.
• the support sleeve may be mechanically connected in the connecting region of the second fiber directly or via an intermediate sleeve with the fiber core of the second fiber.
• the mechanical connection may extend over the spliced ends.
• the extending over the fiber cladding of the second fiber portion of the support sleeve can not be mechanically connected to the fiber cladding in an advantageous manner except for a possibly provided end-face seal.
• the refractive index of the support sleeve can be chosen so that guided via the direct connection in the fiber core guided light in the support sleeve.
• the refractive index of the support sleeve can be constant or change spatially. It is essential here that the guided light in the fiber core can at least partially overcouple in the support sleeve.
• the refractive indices (including any Brechuntervertension) of support sleeve and intermediate sleeve can be chosen so that guided in the fiber core light is coupled via the intermediate sleeve in the support sleeve.
• the support sleeve may be formed as a volume spreader.
• the material of the support sleeve thus acts strongly scattering on the coupled light, since, for example, scattering particles are contained in the material of the support sleeve. This allows the decoupled light over a larger spatial area are discharged into the environment, so that the thermal load per area is reduced.
• the support sleeve may additionally or alternatively be designed as a surface spreader. This can e.g. be realized by the fact that the surface is roughened.
• intermediate sleeve (s) can / can be designed as a volume and / or surface spreader.
• the refractive index (s) can also be chosen so that a coupling of light from the fiber core is suppressed as possible.
• the support sleeve may in particular be formed as a one-piece support sleeve.
• the at least one intermediate sleeve can each be integrally formed.
• the at least one intermediate sleeve can be made of the same material as the support sleeve.
• connection means such as, for example, cured lacquers or resins, heat-shrinkable tubing, etc.
• connection means such as, for example, cured lacquers or resins, heat-shrinkable tubing, etc.
• a method of making a splice between two optical fibers each comprising a fiber core and a cladding adjacent thereto, in at least a first of the two fibers, the cladding in a connection region extending from the end to be spliced each fiber extends in the fiber longitudinal direction along a predetermined length, is completely removed, a support sleeve is pushed over one of the two fibers, the two ends of the fibers to be spliced are aligned and spliced together, the support sleeve is then slipped over the spliced ends, that the spliced ends of the two fibers are arranged in the support sleeve and extends the support sleeve at least along the entire connection region of the first fiber and beyond the fiber cladding of the first fiber, without having their over the fiber cladding of the e
• the fiber-extending portion of the first fiber is applied fiber-extending portion, and the support sleeve is mechanically connected in
• the mechanical connection between the support sleeve and intermediate sleeve or fiber core can be formed as a positive and / or cohesive connection.
• the connection can be realized by means of heat input.
• a laser can be used.
• the section of the support sleeve extending over the fiber cladding of the first fiber can not be mechanically connected to the fiber cladding except for a possibly performed end-side seal.
• the fiber cladding is not excessively thermally stressed.
• both fibers of the fiber cladding in the respective connection region can be completely removed, the support sleeve are pushed over the spliced ends that it extends along the entire connection region of the second fiber and beyond the fiber cladding of the second fiber, without having their extends over the fiber cladding of the second fiber extending portion on the fiber cladding of the second fiber.
• the support sleeve in the connection region of the second fiber may be mechanically connected directly or via an intermediate sleeve with the fiber core of the second fiber. It is also possible that the extending over the fiber cladding of the second fiber portion of the support sleeve is not mechanically connected to a possibly provided end-side seal with the fiber cladding.
• the refractive index of the support sleeve can be selected so that guided via the direct connection in the fiber core light is coupled into the support sleeve.
• the refractive indices of the support sleeve and intermediate sleeve can be selected so that light guided in the fiber core is coupled out via the intermediate sleeve into the support sleeve.
• the support sleeve may be formed as a volume spreader and / or surface spreader.
• an intermediate sleeve can be pushed over one of the two fibers prior to splicing of the two fibers, which is mechanically connected to the fiber core of the first fiber after splicing of the two fibers, after which the support sleeve is mechanically connected to the intermediate sleeve.
• the support sleeve is also possible first to connect the support sleeve to the intermediate sleeve (s) and then the intermediate sleeve (s) to the fiber core (s).
• the mechanical connection of the intermediate sleeve (s) with the fiber core (s) preferably takes place in a material and / or form-fitting manner.
• the connection is generated by a heat input.
• laser radiation can be used.
• Figure 1 is a schematic sectional view of a splice according to the invention according to a first embodiment.
• FIG. 2-6 sectional views for explaining the production of the splice of Fig. 1;
• Fig. 7 is a sectional view for explaining a modification of the manufacturing method;
• 8 is a schematic sectional view of a splice connection according to a further embodiment;
• FIG. 9 shows a schematic illustration of a splice connection according to a further embodiment
• Fig. 10 is a schematic representation of a splice according to another
• Fig. 11 is a schematic representation of a splice according to another
• Fig. 12 is a schematic representation of a splice according to another
• Fig. 13 is a schematic representation of a splice according to another
• Fig. 14 is a schematic representation of a splice according to a further embodiment.
• Fig. 15 is a schematic sectional view of a splice according to another
• the splice connection 1 comprises a first and a second optical fiber 2, 3, which are spliced together. After the two fibers or optical waveguides 2, 3 have the same structure, only the first fiber 2 will be described in detail below.
• the first fiber 2 has a fiber core 4 and a protective or fiber cladding 5 surrounding the fiber core 4.
• the fiber core 4 comprises an inner signal core 6, which from a
• Signal core jacket 7 (hereinafter also referred to as sheath 7) is surrounded.
• Fiber core 4 is made of quartz glass, which is doped differently for the signal core 6 and the cladding 7, so that due to the refractive index jump generated thereby between the signal core 6 and the cladding 7 signal light can be guided in the signal core 6.
• the fiber cladding 5 is formed as a protective polymer jacket 5, whose refractive index is selected so that, if desired, light in the jacket 7 can be performed.
• a predetermined length here about 10 mm
• a second connection region 10 which differs from the spliced end 11 of the second fiber 3 in the longitudinal direction along a predetermined length (here again about 10 mm) extends, is completely removed, so that even in the second fiber 3 within the second connection region 10 of the signal core jacket 7 is completely exposed.
• the splice connection 1 also comprises a support sleeve 12 made of quartz glass, which extends beyond both connection regions 8, 10 and in each case laterally beyond.
• the support sleeve 12 has a substantially constant wall thickness or thickness of about 30 - 200 ⁇ m, but their inner diameter varies in the longitudinal direction.
• the support sleeve 12 has a central portion 13 with a first inner diameter, on each of which a connecting portion 14, 15 connects with increasing inner diameter on both sides, which then each pass into an edge portion 16, 17 with a constant inner diameter, which is larger than that Inner diameter of the central portion 13th
• the central portion 13 is positively and materially connected to the fiber cores 4 and the Signalalkernmänteln 7 of the two fibers 2, 3, whereas the two edge portions 16 and 17 which extend over the fiber sheaths 5 are spaced therefrom, since the inner diameter of the Edge portions 16 and 17 is selected so that it (slightly) larger than the outer diameter of the fiber cladding 5. Between the edge portions 16, 17 and the respective fiber cladding 5 is thus a gap S. The inside of the edge portions 16, 17 is therefore not on the respective fiber cladding 5.
• a ring 18, 19 formed from the same material as the fiber sheaths 5 is applied at both axial ends of the rigid support sleeve 12, which supports the gap S between the respective edge sections 16 and 17 and the fiber sheaths 5 seals.
• the rings 18, 19 no connection of the edge portions 16, 17 with the respective fiber cladding 5 and therefore the corresponding fiber 2, 3 before.
• the support sleeve 12 which can also be referred to as a support tube, is thus a waisted support sleeve 12, since the inner diameter of the central portion 13 is smaller than the inner diameter of the edge portions 16, 17th
• the splice connection 1 of the two fibers 2, 3 mechanically stabilized and protected against undesired bending or buckling.
• This bending or kink protection is further increased by the fact that the two edge sections 16, 17 overlap the polymer protective sheaths 5.
• the fibers 2, 3 shown in FIG. 1 are so-called single-core fibers (single-core fibers).
• the fibers 2, 3 of Fig. 1 may also be formed as double-core fibers.
• the fiber core casing 7 constitutes the so-called pump core 7 in which pumping light is guided.
• the protective jacket 5 in particular has a refractive index such that the guidance of the pumping light can be ensured.
• the refractive index of the quartz glass from which the support sleeve 12 is made is chosen so that it is equal to or greater than the refractive index of the fiber core 7 or the pump core 7, to the guided in the fiber core shells 7 and pumping cores 7 of the fibers 2, 3 Intentionally be able to deflect radiation from the fibers 2, 3.
• the refractive index of the quartz glass of the support sleeve 12 may be constant or vary spatially.
• the support sleeve 12 may be formed so as to have the property of a volume spreader. This can be realized, for example, by the fact that scattering
• the outer support sleeve surface may have scattering properties (eg, roughened) such that the radiation directed from the fibers 2, 3 over a longer period of time
• Spread distributed in the environment can be scattered or emitted and does not escape with high power density from the support sleeve end face.
• the fibers 2, 3 shown in FIG. 1 as double-core fibers in which the radiation propagates not only within the inner signal core 6, but also within the pump core 7, it is often necessary to achieve a desired beam quality End of the entire fiber path only radiation from the inner signal core 6 exits.
• radiation in the region of the spliced ends 9, 11, that is to say within the two connection regions 8, 10 can be deflected out of the pump core 7 via the support sleeve 12 out of the fibers.
• the pumping light absorbed by the inner signal core 6 of the first fiber 2 during propagation in the fiber core 4 can be advantageous in the region of the spliced ends 9, 10 at the end of the active double-core fiber 2 are deflected out of the fiber 2, whereby an unacceptably high thermal load of the fiber path or the second fiber 3 is prevented behind the active fiber 2.
• the refractive index of the quartz glass of the support sleeve 12 can be selected so that it is smaller than the refractive index of the fiber core shell 7 or the pump core 7 Area of the connecting portions 8 and 10 continued through the central portion 13, for example, the guiding of pumping light in the pumping cores 7, so that with the splice according to the invention, the pumping light can pass virtually without loss of power from the first fiber 2 to the second fiber 3.
• the refractive index of the quartz glass of the support sleeve 12 is equal to or less than the refractive index of the polymer protection jacket fifth
• the splice connection 1 shown in Fig. 1 can be manufactured as follows. From the two ends of the fibers 2, 3 ( Figure 2) to be spliced, each of which is e.g. are generated by breaking a fiber, respectively, the fiber cladding 5 of the respective fiber 2, 3 is removed along the predetermined length. This can be done, for example, by cutting with a laser (e.g., femtosecond lasers), by etching, or by scribing and breaking. The ends of the two fibers 2, 3 to be spliced are cleaned, polished or otherwise prepared, if necessary.
• a laser e.g., femtosecond lasers
• the exposed fiber cores may each be refrozen and optionally polished to produce an end to be spliced having the desired properties. This can e.g. by cutting with a laser (e.g. femtosecond laser) or by scribing and breaking.
• a laser e.g. femtosecond laser
• the support sleeve 12 is pushed over one of the two fibers 2, 3. In the embodiment described here, it is pushed so far beyond the second fiber 3, that it does not extend beyond the exposed fiber core 4, but lies completely in the area of the remaining fiber cladding 5 (FIG. 4).
• the support sleeve 12 can also be pushed over the second fiber 3 before exposing the fiber core 4 or after exposing the fiber core 4, but before preparing the end to be spliced.
• the support sleeve 12 is slid over the spliced ends 9, 11 so as to extend beyond the connecting portions 8, 10 on both sides, thus overlapping the fiber sheaths 5 ( Figure 6).
• the central portion 13 of the support sleeve 12 is shrunk onto the exposed fiber cores by a melting process (collapsed), so that a positive and cohesive connection is formed.
• the connecting portions 14, 15 and the edge portions 16, 17 are excluded from the melting process, so that no thermal damage to the polymer protection jacket 5 occurs.
• the rings 18 and 19 are formed and, if desired, the outer shell surface of the support sleeve 12 is roughened, so as to obtain the splice connection shown in Fig. 1.
• the roughening of the outer surface of the cladding may, of course, also be carried out in an earlier step or even before being pushed onto the second fiber 3.
• the support sleeve 12 can already be prefabricated so far that the necessary changes in diameter during collapse onto the fiber cores are minimal. In this case, it may happen that the inner diameter of the central portion 13 is already smaller than the outer diameter of the fiber cladding 5 of the second fiber 3. If present, the support sleeve 12 can not, as shown in Fig. 4, completely over the fiber cladding fifth be pushed, but only partially, as indicated in Fig. 7. Otherwise, the steps for producing the splice connection correspond to the steps shown in FIGS. 2 to 6.
• a second embodiment of the splice connection 1 according to the invention is shown, which differs from the embodiment shown in Fig. 1 in that the inner diameter of the support sleeve 12 is substantially constant over its entire length. Furthermore, a rigid or rigid intermediate sleeve 20 made of quartz glass is provided, which is positively and materially connected to the two fiber cores 4 in the region of the spliced ends 9, 11. The support sleeve 12 is in turn positively and materially connected to the outer circumferential surface of the intermediate sleeve 20. Thus, there is a mechanical connection between the support sleeve 12 and the fiber cores 4 via the intermediate sleeve 20. The edge portions 16, 17 of the support sleeve 12, which overlap the fiber sheaths 5, are spaced from the fiber shrouds 5 in the same way as in the embodiment of FIG. 1.
• both the intermediate sleeve 20 and the support sleeve 12 are pushed over one of the two fibers 2, 3 before splicing of the two fibers 2, 3.
• both sleeves 12, 20 via the same fiber 2, 3 or the intermediate sleeve 20 via one of the two fibers 2, 3 and the support sleeve on the other of the two fibers 2, 3 are pushed.
• the intermediate sleeve 20 is first brought into the position shown in FIG. 8 and collapsed onto the fiber cores 4.
• the support sleeve 12 is brought into the position shown in Fig. 8 and collapsed onto the intermediate sleeve.
• FIG. 9 shows a modification of the splice connection shown in FIG.
• two intermediate sleeves 21, 22 are arranged in FIG. 9, wherein one of the intermediate sleeves 21 and 22 lies in each case in one of the two connecting regions 8 and 10.
• the intermediate sleeves 21 and 22 are formed in the same manner as the intermediate sleeve 20 except for their geometrical dimensions, and in turn are positively and materially connected to the corresponding fiber cores 4.
• the support sleeve 12 is positively and materially connected to the two intermediate sleeves 21 and 22.
• the intermediate sleeves are first connected to the fiber cores and then the support sleeve with the intermediate sleeves.
• Fig. 10 an embodiment is shown in which two fibers 2 1 , 3 1 are spliced together with very different diameters.
• the fibers 2 'and 3' are basically constructed in the same way as the fibers 2 and 3 of the embodiments described in connection with FIGS. 1 to 9.
• the support sleeve 12 tapers in the embodiment of Fig. 10 gradually from the thicker fiber 2 1 to the thinner fiber 3 1 out.
• the two edge portions 16 and 17 of the support sleeve 12 on different inner diameter, which are adapted to the respective outer diameter of the two fibers 2 'and 3'.
• the inner diameter of the respective edge portion 16, 17 is always (slightly) larger than the respective outer diameter of the fiber sheaths 5 of the corresponding fiber 2 ', 3'.
• the support sleeve 12 in the middle section 13 is positively and materially connected to the fiber core shell 7 and the pump core 7 of the fiber 2 '.
• a pump core 7 e.g. the desired coupling of the pump light can be ensured.
• FIG. 11 a modification of the embodiment of Fig. 10 is shown, which differs only in that between the central portion 13 of the support sleeve 12 in the second connection region 10 and the fiber 3 1, an intermediate sleeve 23 is arranged, the positive and cohesive with the fiber core 4 of the fiber 2 'is connected.
• the intermediate sleeve 23 is formed in the same way as the intermediate sleeve 20 except for its geometrical dimensions Central portion 13 of the support sleeve 12 is in turn connected positively and cohesively with the intermediate sleeve 23.
• a modification of the embodiment of Fig. 11 is shown, in which the central portion 13 and the connecting portion 15 and the edge portion 17 have the same inner diameter.
• a support disk 24 is provided, which has a central bore 25 with an inner diameter which is greater than the outer diameter of the fiber cladding 5 of the fiber 3 '' Furthermore, the support disk 24 has such an outer diameter that the left end face 26 of the support sleeve 12 at The end face 26 is positively and materially connected to the inner side 27. Due to the constant inner diameter of central section 13, connecting section 15 and edge section 17, the axial length of the intermediate sleeve 23 can be selected to be greater than this is possible in the embodiment of FIG. 11.
• support sleeve 12 Due to the cohesive connection of support sleeve 12 and support plate 24, they together form a two-part support sleeve.
• a second support plate 28 is provided, the positive and cohesive with the right end face 29 of
• Support sleeve 12 is connected, wherein the second support plate 28 has a Mittelbphrung 30 whose inner diameter is slightly larger than the outer diameter of the fiber cladding 5 of the
• the support sleeve 12 may thus have a constant inner diameter over its entire length. Thus, in comparison with FIG. 12, it can be positively and materially connected over a greater length to the fiber core 4 of the first fiber 2 '.
• Fig. 14 a further modification of the embodiment of Fig. 12 is shown.
• the support sleeve 12 in turn has a constant inner diameter over its entire length.
• the inner diameter is chosen so that it is slightly larger than the
• a further intermediate sleeve 31 is provided, which is positively and materially connected to the fiber core 4 of the first fiber 2 1 .
• the intermediate sleeve 31 is formed in the same way as the intermediate sleeve 20 except for its geometrical dimensions.
• the support sleeve 12 is in each case positively and materially connected to the intermediate sleeve 31 and the intermediate sleeve 23.
• Fig. 15 an embodiment of the splice according to the invention is shown, in which the support sleeve 12 in turn has a constant inner diameter over its entire length.
• the right end face 29 of the support sleeve 12 is positively and materially connected to a support plate 32 which may be formed in the same manner as the second support plate 28 as shown in FIG. 13.
• the second fiber 3 1 is in a ferrule 33 (ferrule for optical fibers) guided, wherein the ferrule 33 has a stepped central bore 34 which has from its right end a first portion 35 of constant first inner diameter corresponding to the outer diameter of the fiber core 7 of the second fiber 3 ', and an adjoining second portion 36, with a suddenly larger second inner diameter, which additionally increases going to the left, which is at least slightly larger than the outer diameter of the fiber cladding 5 of the second fiber 2 '.
• the outer diameter of the ferrule 33 is selected so that the support sleeve 12 can be positively and materially connected to the ferrule 33.
• an intermediate sleeve 31 is provided, which except for their geometric dimension of
• Intermediate sleeve of Fig. 14 corresponds.
• the intermediate sleeve 31 is positively and materially connected to the fiber core 4 of the first fiber 2 'and the support sleeve 12 is positively and materially connected to the intermediate sleeve 31.
• the support disks 24 and 28 shown in FIGS. 12-15 are preferably made of the same material as the support sleeve 12. The same applies to the ferrule 33.

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• Physics & Mathematics (AREA)
• Engineering & Computer Science (AREA)
• Plasma & Fusion (AREA)
• General Physics & Mathematics (AREA)
• Optics & Photonics (AREA)
• Mechanical Coupling Of Light Guides (AREA)
• Optical Couplings Of Light Guides (AREA)

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• 2008
  • 2008-12-23 DE DE102008062847A patent/DE102008062847A1/de not_active Ceased
• 2009
  • 2009-12-18 EP EP12157777.9A patent/EP2461194B1/de not_active Not-in-force
  • 2009-12-18 US US13/141,913 patent/US20110317967A1/en not_active Abandoned
  • 2009-12-18 WO PCT/DE2009/001787 patent/WO2010072204A2/de active Application Filing
  • 2009-12-18 EP EP09810740A patent/EP2380051A2/de not_active Withdrawn
  • 2009-12-18 CN CN2009801512818A patent/CN102257416A/zh active Pending
  • 2009-12-18 JP JP2011542670A patent/JP5723291B2/ja not_active Expired - Fee Related

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