EP3811135A1 - Vorrichtung und verfahren zur ausrichtung von polarisationserhaltenden lichtleitfasern - Google Patents
Vorrichtung und verfahren zur ausrichtung von polarisationserhaltenden lichtleitfasernInfo
- Publication number
- EP3811135A1 EP3811135A1 EP19736990.3A EP19736990A EP3811135A1 EP 3811135 A1 EP3811135 A1 EP 3811135A1 EP 19736990 A EP19736990 A EP 19736990A EP 3811135 A1 EP3811135 A1 EP 3811135A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- optical fiber
- clamping
- fiber
- clamping device
- rotational position
- 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.)
- Pending
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
- G02B6/36—Mechanical coupling means
- G02B6/38—Mechanical coupling means having fibre to fibre mating means
- G02B6/3801—Permanent connections, i.e. wherein fibres are kept aligned by mechanical means
- G02B6/3803—Adjustment or alignment devices for alignment prior to splicing
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/02—Optical fibres with cladding with or without a coating
- G02B6/024—Optical fibres with cladding with or without a coating with polarisation maintaining properties
-
- 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
- G02B6/2555—Alignment or adjustment devices for aligning prior to splicing
Definitions
- the invention relates to a method according to the preamble of claim 1 and a device according to the preamble of claim 11.
- optical fiber end pieces have to be positioned or held with a certain orientation. This applies, for example, when fitting a connector with end pieces of optical fibers, when coupling light into an integrated photonic circuit or when splicing two optical fibers.
- light is also understood to mean the range of electromagnetic radiation which lies outside the spectrum visible to the human eye.
- DE 102 42 379 A1 discloses a method and a device for positioning an optical fiber and for splicing two optical fibers, one of which
- optical fiber Longitudinal section of the optical fiber perpendicular to its longitudinal direction is held in a fixed position relative to a pleating element by cohesive or adhesive forces of a liquid.
- the liquid can be realized, for example, in the form of a drop protruding from a pipette or by a drop of liquid in a triangular groove.
- the optical fiber is held at a distance from the folding element by means of a clamping device, which is rotated in total in order to rotate the
- Optical fibers these are each placed on a tensioning device.
- the splicing should also be particularly suitable for polarization-maintaining optical fibers.
- the alignment of the optical fibers takes place in a translatory manner, so that the center points of the optical fibers to be connected are aligned with one another.
- the optical fibers are rotated around their respective position Adapt the longitudinal axis of the fibers to one another in order to avoid weakening the polarized radiation to be transmitted. To adjust the rotational position
- At least one of the optical fibers is rotated to the required extent by means of an alignment shaft in which the optical fiber is clamped.
- Determination of the position of a fiber core in an optical fiber is known, this document also essentially referring to the splicing of optical fibers. These can be, for example, PANDA fibers or bow-tie fibers.
- the rotational position of an optical fiber is determined by means of two optical systems, which consist of two different ones, each to the longitudinal axis of the
- Optical fiber radiate perpendicular directions through the optical fiber and analyze the structure of the radiation passing through.
- the determination of the rotational position is due to the given symmetries in the special considered here
- the optical fiber can be rotated relative to the optical systems by rotating a holder fixing the optical fiber.
- One of the clamping devices is used to rotate the optical fiber clamped therein, and for the rotation this clamping device itself is rotated overall relative to other components of the device.
- the invention is based on the technical problem, a method and a
- the optical fiber to be clamped with a clamping device, one by one
- Clamping device is moved relative to at least one further clamping element of the same clamping device, which is also in contact with the optical fiber.
- the rotation of the optical fiber has so far been achieved using a tool by rotating the clamping device as a whole.
- This disadvantageous procedure due to the space requirement is avoided in that the rotation of the optical fiber is achieved in that at least two clamping elements, which each rest on the optical fiber and are part of a tool, namely a clamping device, are moved relative to one another.
- the application of the respective clamping element to the optical fiber means either a direct application to a part of the optical fiber, such as the fiber matrix or a fiber jacket or another coating, or an indirect application to the optical fiber, namely an element surrounding the optical fiber, such as, for example Cable sheath or other casing.
- a cable jacket or a sheath can be firmly connected to the optical fiber or the clamping is carried out strong enough that due to frictional forces between the optical fiber and Cable sheath or sheath the relative movement of the adjacent clamping elements causes the desired rotation of the optical fiber.
- the relative movement of the clamping elements involved can be a pure one
- the clamping elements can be similar to the elements of a pliers head, but can be displaced relative to one another in their longitudinal direction.
- the translation movement should have a component perpendicular to the fiber longitudinal axis. If it is a pure translational movement, this can result in the optical fiber performing a rolling movement on at least one of the adjacent clamping elements.
- the rotational movement in addition to the rotational position of the optical fiber also changes the other spatial coordinates of the optical fiber, which is why, if necessary, a correction of these spatial coordinates by a translatory movement of the clamping device as a whole can be useful.
- a change in the other spatial coordinates of the optical fiber could also be avoided with a purely translational movement of the clamping elements relative to one another, if a stationary sliding bearing that allows rotation is provided on one of the clamping elements for the optical fiber and this clamping element is held stationary in its spatial coordinates.
- the method according to the invention can also be carried out in such a way that the relative movement is a pure rotational movement or a mixed translational and rotational movement and at least one of the clamping elements resting on the optical fiber is a roller element rotatably mounted in the clamping device.
- a pure rotational movement between the clamping elements involved can be achieved, for example, in such a way that all the clamping elements involved are rotatably mounted roller elements on which the optical fiber is in contact, for example three roller elements arranged at the corner points of a triangle, at least one of the roller elements being actively driven.
- a role element can, for example, in scope
- a non-rotating clamping element with a sliding surface for the optical fiber can be used.
- Clamping elements of the clamping device can be achieved, for example, by the optical fiber on the one hand being supported on at least one rotatably
- Roller element and on the other hand abuts at least one further clamping element which is moved translationally relative to this at least one roller element.
- a clamping element with a sliding surface can be used. If the at least one roller element is held stationary in the room, the optical fiber can otherwise be in its rotational position
- the inventive method can also be carried out so that
- Optical fiber which can be viewed to determine the rotational position.
- the light irradiation can take place, for example, at an open end of the optical fiber facing away from the exit facet in the fiber-axial direction into an entry facet or from the lateral direction. In the case of lateral irradiation, this can also take place - if available at the location of the irradiation - through a fiber sheath, a cable sheath or other covering or directly into the fiber matrix or another part of the optical fiber, provided there is sufficient transparency for the incident light. It can be advantageous to carry out the method according to the invention in such a way that at an open end of the optical fiber, in particular at the exit facet, a light pattern which is dependent on the rotational position of the optical fiber and is generated by the incident light is detected by means of a detection device. Due to the structure of the optical fiber, the light pattern can be sufficiently determining for its rotational position. Is the optical fiber, for example, a so-called PANDA fiber, in which in a fiber matrix next to one intended for the conduction of polarized radiation
- Fiber core two tension rods are provided, which also conduct the incident light, the position of these tension rods can be seen at an open end of the optical fiber, so that the rotational position of the optical fiber can be detected. If the tension bars also stand out sufficiently from the fiber matrix without light irradiation, a detection of the rotational position would also be possible without light irradiation.
- other structures of the optical fiber such as, for example, bow tie fibers or fibers with an elliptically shaped jacket (oval inner clad fiber).
- the light radiation into the entrance facet can also e.g. the irradiation of polarized light into a polarization-maintaining structure of the optical fiber, with the orientation of the polarization of the on the exit side being checked for checking the rotational position
- emerging light is used, e.g. with a polarimeter as
- the rotation position can also be checked by checking the coupling into another optical fiber whose rotation position is known.
- the method according to the invention can also be carried out in such a way that the light is radiated into the optical fiber inside the clamping device and / or through at least a partial area of the clamping device.
- a light source for this can be arranged in or on the clamping device or can be fixed thereon. This can further save space since the light does not shine in
- Clamping device must be done. Depending on the arrangement of the light source, it may be necessary for the clamping device to have a sufficiently transparent area at least between the light source and the clamped-in optical fiber.
- the irradiation of the light through at least a partial area of the clamping device can also be carried out in such a way that the light is irradiated via at least one of the clamping elements.
- Clamping element of adjacent material of the fiber e.g. of the fiber cladding
- the clamping element concerned is made of the same material or a material which is similar in terms of refractive behavior as the material of the part of the optical fiber which lies against the clamping element.
- the materials can e.g. be acrylic or glass.
- the efficiency of coupling the light from the affected clamping element into the optical fiber can also be reduced by a
- Intermediate material e.g. a liquid or a gel with a suitable refractive index of e.g. 1.45 to 1.55, if otherwise good optical contact is problematic.
- the inventive method can also be carried out so that the
- Optical fiber arranged at a distance from the clamping device
- Holding device can be held.
- the clamping device is at least partially relieved of any tensile forces.
- the holding device can serve to establish a reference point for the rotation of the optical fiber.
- the holding device can be a jacket fixing device which holds a cable jacket surrounding the optical fiber, the cable jacket allowing the optical fiber to rotate therein.
- the holding device can also be from
- the storage can be so loose that the optical fiber or the cable jacket in the holding device in the event of rotation of the
- Clamping device can also rotate the clamped piece of the optical fiber or follow another movement. Since the rotation required to correct the rotational position is generally very small, for example at most 90 °, it is also possible to turn the optical fiber or the cable jacket in the holding device is not necessary in every case, so that a firm mounting in the holding device is also possible.
- the method according to the invention can also be carried out in such a way that a distal end of the optical fiber is fixed in a fixing element with the desired rotational position.
- the fixing element can be, for example, a plug unit or a chip to which the optical fiber is fixed.
- the fixing element can also be a further optical fiber, for example for splicing with the first optical fiber.
- the method according to the invention can also be carried out such that the rotation of the optical fiber is controlled by means of the detected rotational position of the optical fiber.
- This measure supports a fully automatic alignment and / or positioning of the polarization-maintaining optical fiber.
- 1 a an optical waveguide with a PANDA fiber
- 1 b an optical waveguide with a fiber with an elliptical cladding
- 1 c an optical waveguide with a bow-tie fiber
- 3 an apparatus for performing the method according to the invention
- 4 a clamping device with pure translational relative movements between clamping elements
- Fig. 5 a clamping device with translatory and rotary
- FIG. 1 a shows a cross section schematically of a first optical waveguide 1 a with an optical fiber 7 a with a structure of the so-called PANDA fiber type.
- the optical fiber 7a has a fiber matrix 2a surrounded by a fiber cladding 5a and an inner fiber core 3a embedded in the fiber matrix 2a
- Fiber core 3a two tension rods 4a generating mechanical tension are arranged in the fiber matrix 2a.
- the mechanical tension is decisive for the polarization-maintaining property of the optical fiber 7a.
- the optical fiber 7a is rotatably arranged in a cable jacket 6a. The representation is to be understood in principle and not to scale.
- FIG. 1 b shows, corresponding to the representation of FIG. 1 a, a second optical waveguide 1 b with a second optical fiber 7 b with a structure of the so-called oval inner clad fiber type.
- the structure of the second optical waveguide 1 b corresponds to
- Optical fiber 7b Optical fiber 7b.
- FIG. 1 c shows, corresponding to the representation of FIG. 1 a, a third optical waveguide 1 c with a third optical fiber 7 c with a structure of the so-called bow-tie fiber type.
- the structure of the third optical waveguide 1 c essentially corresponds to that of the 1 a, according to FIG. 1 a, but in the fiber matrix 2c surrounded by the fiber cladding 5c there are no round tension rods but rather tension rods 4c with the cross section of an isosceles trapezoid.
- a cable sheath 6c surrounds the third optical fiber 7c.
- optical fibers 1 a, 1 b and 1 c are known from the prior art.
- Optical fiber 7a of the PANDA fiber type is shown.
- the exemplary embodiments apply correspondingly to other polarization-maintaining optical waveguide types, in particular also to optical waveguide types which correspond to the second optical waveguide 1 b or the third optical waveguide 1 c.
- optical fibers 7a Arrange a plurality of optical fibers 7a, optionally freed from the fiber cladding 5a, in a plug unit 8, the optical fibers 7a in a defined one
- the optical fibers 7a can be fixed in V-shaped grooves 9 of the plug unit 8 with an adhesive (not shown here) and additionally or alternatively with a cover element 10. As an alternative to fixing the optical fibers 7a freed from the fiber cladding 5a in the grooves 9, e.g. with direct contact between
- Fiber matrix wall and groove wall it is possible to use the optical fibers 7a
- the inventive method and the inventive device are used, of which an exemplary embodiment is shown schematically in FIG. 3.
- a jacket fixing device 11 With a jacket fixing device 11, the one laid around the optical fiber 7a
- the optical fiber 7a of the optical waveguide 1 a is held at a distal end, at which the optical waveguide 1 a is freed from the cable jacket 6 a, by a clamping device 12 on the fiber jacket 5 a.
- the clamping device 12 is shown in another in FIG.
- the shown basic view consists of a substantially flat first clamping element 13 and a substantially flat second clamping element 14, which are arranged on a manipulation unit 15.
- the second clamping element 14 is moved relative to the first clamping element 13 in a translational movement, for example down or up in FIG. 3 or 4. Since the optical fiber 7a bears firmly on both clamping elements 13 and 14, it receives a rotation about its longitudinal axis through the translational movement. Since the optical fiber 7a on both without further measures
- the optical fiber 7a will also perform a translational movement in FIGS. 3 and 4 upwards or downwards.
- This translational movement of the optical fiber 7b can be achieved by a corresponding translational movement of the entire clamping device 12
- the rotational position of the optical fiber 7a is determined on the basis of a detection device 16 which is only indicated schematically in FIG. 3. Provision can also be made to simultaneously determine the other spatial position of the optical fiber 7a with the detection device 16. A signal generated by the detection device 16 and dependent on the rotational position and / or other spatial position of the optical fiber 7a can be used for
- the fiber matrix 2a is inserted into one of the grooves 9 (see FIG. 2) of the plug unit 8, for example by means of a movement of the clamping device 12 or by a separate movement of the plug unit 8.
- the latter can be hardened by means of a UV lamp 17.
- Tension rods 4a (see Fig. 1) is forwarded.
- the light can be irradiated laterally through the fiber cladding 5a by means of a light source 18.
- FIG. 5 shows a second clamping device variant 19 with a first clamping element 20, a second clamping element 21 and a third clamping element 22, the second and third clamping elements 21 and 22 being rotatably mounted in the clamping device variant 19 in a manner not shown here and e.g. have the shape of a cylindrical roller.
- the rotating optical fiber 7a now does not perform any clamping elements 21 or 22
- Clamping elements 21 and 22 remain fixed in the room.
- Clamping device variant 23 rotatably mounted clamping elements 24, 25, 26 and 27 is clamped.
- One of the clamping elements, e.g. Clamping element 24 is actively driven and thus ensures that the optical fiber 7a rotates while the others
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Mechanical Coupling Of Light Guides (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102018114741.4A DE102018114741B4 (de) | 2018-06-19 | 2018-06-19 | Vorrichtung und Verfahren zur Ausrichtung von polarisationserhaltenden Lichtleitfasern |
| PCT/EP2019/065774 WO2019243207A1 (de) | 2018-06-19 | 2019-06-14 | Vorrichtung und verfahren zur ausrichtung von polarisationserhaltenden lichtleitfasern |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3811135A1 true EP3811135A1 (de) | 2021-04-28 |
Family
ID=67211665
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19736990.3A Pending EP3811135A1 (de) | 2018-06-19 | 2019-06-14 | Vorrichtung und verfahren zur ausrichtung von polarisationserhaltenden lichtleitfasern |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20210294044A1 (de) |
| EP (1) | EP3811135A1 (de) |
| DE (1) | DE102018114741B4 (de) |
| WO (1) | WO2019243207A1 (de) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4339669B1 (de) * | 2022-09-13 | 2025-08-27 | Optek Systems, Inc. | Verfahren zur ausrichtung und beendigung einer polarisationserhaltenden (pm)-glasfaser und bildung einer pm-glasfaseranordnung |
| US12543856B2 (en) | 2023-08-21 | 2026-02-10 | Newage Products Inc. | Storage apparatus |
| NL2036902B1 (en) * | 2024-01-26 | 2025-08-08 | Microalign B V | Alignment arrangement for aligning a first and a second optical component |
| WO2025159634A1 (en) * | 2024-01-26 | 2025-07-31 | Microalign B.V. | Alignment arrangement for aligning a first and a second optical component |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5561726A (en) * | 1995-09-05 | 1996-10-01 | Yao; X. Steve | Apparatus and method for connecting polarization sensitive devices |
| JP2002072003A (ja) * | 2000-08-29 | 2002-03-12 | Furukawa Electric Co Ltd:The | 光ファイバクランプ |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0246636B1 (de) * | 1986-05-20 | 1993-03-03 | Fujikura Ltd. | Vorrichtung zum Verschmelzen von optischen Fibern mit Polarisationserhaltung |
| US5013345A (en) | 1987-12-04 | 1991-05-07 | Fujikura Ltd. | Method of fusion-splicing polarization maintaining optical fibers |
| DE3937057A1 (de) | 1989-11-07 | 1991-05-08 | Standard Elektrik Lorenz Ag | Spleissvorrichtung fuer optische glasfasern |
| DE19843093C2 (de) * | 1998-09-21 | 2001-08-30 | Feistkorn & Wolf Elek Sche Ver | Verbindungsvorrichtung für Lichtwellenleiter |
| DE10242379A1 (de) | 2002-09-12 | 2004-04-01 | Siemens Ag | Verfahren und Vorrichtung zum Positionieren eines Lichtwellenleiters sowie zum Verspleißen von zwei Lichtwellenleitern |
| DE10306323A1 (de) * | 2003-02-14 | 2004-09-02 | Siemens Ag | Vorrichtung zum Spannen und Drehen einer lichtleitenden Faser, Spleißvorrichtung |
| DE102005020622A1 (de) | 2005-05-03 | 2006-11-16 | CCS Technology, Inc., Wilmington | Verfahren und Vorrichtung zur Bestimmung der Lage eines Faserkerns in einer optischen Faser |
-
2018
- 2018-06-19 DE DE102018114741.4A patent/DE102018114741B4/de active Active
-
2019
- 2019-06-14 WO PCT/EP2019/065774 patent/WO2019243207A1/de not_active Ceased
- 2019-06-14 EP EP19736990.3A patent/EP3811135A1/de active Pending
- 2019-06-14 US US17/253,769 patent/US20210294044A1/en not_active Abandoned
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5561726A (en) * | 1995-09-05 | 1996-10-01 | Yao; X. Steve | Apparatus and method for connecting polarization sensitive devices |
| JP2002072003A (ja) * | 2000-08-29 | 2002-03-12 | Furukawa Electric Co Ltd:The | 光ファイバクランプ |
Non-Patent Citations (6)
| Title |
|---|
| ANONYMOUS: "CPC250 In-Line Fiber Optic Polarization Controller for �250 �m Bare Fiber", THORLABS, 27 December 2017 (2017-12-27), pages 1, XP055952122, Retrieved from the Internet <URL:https://www.thorlabs.com/thorproduct.cfm?partnumbeR=CPC250> [retrieved on 20220816] * |
| ANONYMOUS: "CPC900 In-Line Fiber Optic Polarization Controller for �900 �m Tight-Buffer Fiber", THORLABS, 4 December 2017 (2017-12-04), pages 1, XP055952126, Retrieved from the Internet <URL:https://www.thorlabs.com/thorproduct.cfm?partnumbeR=CPC900> [retrieved on 20220816] * |
| ANONYMOUS: "Demonstrations in physical optics MULTI-MODE FIBER", 1 January 2008 (2008-01-01), pages 1 - 2, XP055952114, Retrieved from the Internet <URL:https://ocw.mit.edu/courses/res-6-006-video-demonstrations-in-lasers-and-optics-spring-2008/resources/multi-mode-fiber/> [retrieved on 20220816] * |
| MIT OPENCOURSEWARE: "Optics: Polarization in a single mode fiber | MIT Video Demonstrations in Lasers and Optics", 15 June 2012 (2012-06-15), XP055952110, Retrieved from the Internet <URL:https://www.youtube.com/watch?v=kuht5Nv3Iio> * |
| MOHAMMAD SHOEB ANSARI: "How far can you bend optical fibre cable", 11 September 2017 (2017-09-11), XP055952119, Retrieved from the Internet <URL:https://www.youtube.com/watch?v=3vQjRYoA3lg> * |
| See also references of WO2019243207A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2019243207A1 (de) | 2019-12-26 |
| DE102018114741A1 (de) | 2019-12-19 |
| US20210294044A1 (en) | 2021-09-23 |
| DE102018114741B4 (de) | 2022-06-30 |
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