WO2017086388A1 - Procédé de connexion de fibres optiques, et procédé de fabrication d'une structure de connexion de fibres optiques - Google Patents

Procédé de connexion de fibres optiques, et procédé de fabrication d'une structure de connexion de fibres optiques Download PDF

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Publication number
WO2017086388A1
WO2017086388A1 PCT/JP2016/084108 JP2016084108W WO2017086388A1 WO 2017086388 A1 WO2017086388 A1 WO 2017086388A1 JP 2016084108 W JP2016084108 W JP 2016084108W WO 2017086388 A1 WO2017086388 A1 WO 2017086388A1
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WIPO (PCT)
Prior art keywords
optical fiber
refractive index
index matching
matching agent
base member
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PCT/JP2016/084108
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English (en)
Japanese (ja)
Inventor
フン フー ルオン
貴治 松田
太田　達哉
瀧澤　和宏
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株式会社フジクラ
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Publication of WO2017086388A1 publication Critical patent/WO2017086388A1/fr

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    • 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

Definitions

  • the present invention relates to an optical fiber connection method and an optical fiber connection structure manufacturing method.
  • the mechanical splice method is a method of connecting optical fibers by aligning and pressing and fixing the front end surfaces of optical fibers to be connected using alignment members (also referred to as mechanical splice elements).
  • the mechanical splice method is used in many fields because it can be connected in a short time without fusing optical fibers.
  • a liquid refractive index matching agent is interposed in the optical fiber connection part (the part where the end face of one optical fiber and the end face of the other optical fiber are abutted) to reduce the connection loss. Reductions are being made.
  • a liquid refractive index matching agent is applied in advance before connecting the optical fiber, and when the end of the optical fiber is inserted into the liquid refractive index matching agent, bubbles are taken into the end face of the optical fiber. There is a fear (see FIG. 5 described later). As a result, there is a possibility that bubbles are sandwiched in the connection portion of the optical fiber, and the optical connection loss may increase.
  • An object of the present invention is to suppress the formation of bubbles on the end face of an optical fiber.
  • the main invention for solving the above-described problem is that an insertion step of inserting a first optical fiber between a base member and a lid member, an end face of the first optical fiber in an alignment groove of the base member, and the first The base member and the lid member in a state in which the connection step of abutting the end surface of the second optical fiber different from the first optical fiber and the end surface of the second optical fiber different from the first optical fiber are abutted And a pressing step of pressing and fixing the first optical fiber and the second optical fiber with the alignment groove, and a liquid refractive index matching agent is injected into a gap between the base member and the lid member,
  • An optical fiber connection method including an injection step of filling a liquid refractive index matching agent between an end face of a first optical fiber and an end face of the second optical fiber.
  • FIG. 1 is a perspective view of the optical fiber connector of the first embodiment viewed from above.
  • 2A to 2C are cross-sectional views of the optical fiber connector according to the first embodiment (planes cut along the line A-A ′ in FIG. 1).
  • FIG. 3 is a work flow diagram of the optical fiber connection method in the first embodiment.
  • 4A to 4C are explanatory diagrams of the injection path of the liquid refractive index matching agent C1.
  • 5A and 5B are explanatory diagrams of a comparative example.
  • FIG. 6 is a top view of the base member 31 according to the second embodiment.
  • 7A and 7B are explanatory diagrams of the optical fiber connection method according to the second embodiment.
  • FIG. 8A to 8D are explanatory views showing the functions of the liquid refractive index matching agent C1 and the solid refractive index matching material C2 of the third embodiment.
  • FIG. 9 is an explanatory diagram of the relationship between the hardness and thickness of the solid refractive index matching material C2 of the third embodiment.
  • FIG. 10 is an explanatory diagram of a method of forming a solid refractive index matching material C2 according to the third embodiment.
  • FIG. 11 is a top view of the base member 31 according to the fourth embodiment.
  • 12A and 12B are explanatory views of the alignment member 30 ′′ of the fifth embodiment.
  • the end face of the first optical fiber and the second light different from the first optical fiber are joined by the base member and the lid member in a state in which the end face of the second optical fiber different from the first optical fiber is abutted with the connecting step of abutting the end face of the fiber with each other.
  • An optical fiber connecting method having an injection step of filling a liquid refractive index matching agent between the end faces of the optical fiber becomes clear. According to this optical fiber connection method, it is possible to suppress the formation of bubbles on the end face of the optical fiber.
  • an insertion member is interposed between the base member and the lid member, and in the pressing step, the insertion member is between the base member and the lid member.
  • the liquid refractive index matching agent is injected into a portion where the insertion member has been inserted. Thereby, the insertion member does not get in the way when the liquid refractive index matching agent is injected. Further, since the gap between the base member and the lid member becomes narrow when the insertion member is removed, the liquid refractive index matching agent is likely to penetrate due to capillary action.
  • the liquid refractive index matching agent is permeated to the gap between the base member and the lid member on the side opposite to the side where the liquid refractive index matching agent is injected as viewed from the alignment groove. It is desirable. Thereby, even if bubbles are formed on the end face of the optical fiber, the bubbles can be removed.
  • a recess for inserting the insertion member is formed, and in the injection step, the liquid refractive index matching agent is preferably injected into the recess. Thereby, it can suppress that a liquid refractive index matching agent flows out outside.
  • a wet member that wets the liquid refractive index matching agent is provided between the base member and the lid member.
  • the liquid refractive index matching agent is removed from the wet member in the pressing step. Is squeezed out to inject the liquid refractive index matching agent into the gap between the base member and the lid member, and between the end face of the first optical fiber and the end face of the second optical fiber, It is desirable to fill with a liquid refractive index matching agent.
  • an insertion member is inserted between the base member and the lid member, and the wetting member is disposed on the insertion member side when viewed from the alignment groove. It is desirable that Thereby, it becomes easy to fill a liquid refractive index matching agent between the end faces of the optical fiber.
  • a solid refractive index matching material is formed in advance on the end face of the second optical fiber, and in the connecting step, the end face of the first optical fiber and the second light are interposed via the solid refractive index matching material. It is desirable to abut the end face of the fiber. Thereby, the clearance gap between the end surfaces of an optical fiber can be reduced.
  • the solid refractive index matching material has a shape with a protruding central portion. This makes it difficult for bubbles to be formed on the optical path.
  • the solid refractive index matching material has a thickness and a shore hardness E of 20 ⁇ m, a shore hardness E of 30, a thickness of 20 ⁇ m, a shore hardness E of 85, a thickness of 40 ⁇ m, and a shore hardness E Is within a range surrounded by four points, a point of 85, a thickness of 60 ⁇ m, and a Shore hardness E of 30. Thereby, an optical fiber can be suitably connected.
  • the end face of the first optical fiber and the second light different from the first optical fiber are joined by the base member and the lid member in a state in which the end face of the second optical fiber different from the first optical fiber is abutted with the connecting step of abutting the end face of the fiber with each other.
  • An optical fiber connection structure manufacturing method having an injection step of filling a liquid refractive index matching agent between end faces of an optical fiber becomes clear. Thereby, an optical fiber connection structure with reduced optical connection loss can be manufactured.
  • FIG. 1 is a perspective view of the optical fiber connector of the first embodiment viewed from above.
  • 2A to 2C are cross-sectional views of the optical fiber connector according to the first embodiment (planes cut along the line A-A 'in FIG. 1).
  • 2A shows a state where the insertion member F is inserted from the insertion recess 30B
  • FIGS. 2B and 2C show a state where the insertion member F is removed from the insertion recess 30B.
  • an X axis, a Y axis, and a Z axis indicate directions in order to clarify the positional relationship of each member in each drawing, and the respective axes are orthogonal to each other.
  • the X axis is a direction parallel to the optical axis direction of the optical fiber 10.
  • the Y axis is a direction parallel to the removal direction of the insertion member F.
  • the Z axis is a direction orthogonal to the X axis and the Y axis.
  • the side of the optical fiber 11 on the insertion side viewed from the built-in side optical fiber 10 in the X-axis direction may be expressed as “front”.
  • the Y axis may be expressed as “lateral direction”.
  • the side of the lid member 32 viewed from the base member 31 in the Z-axis direction (the arrow direction of the Z-axis shown in FIG. 1) may be expressed as “upward”.
  • the optical fiber connector is a connector for optically connecting optical fibers.
  • the optical fiber connector of the first embodiment is a connector used for an on-site assembly type optical connector that connects optical fibers by a mechanical splice method.
  • the optical fiber connector of the first embodiment includes an optical fiber 10, a ferrule 20, and an alignment member 30.
  • the optical fiber connector connects the optical fiber 10 built in the ferrule 20 and the other optical fiber 11 by the alignment member 30 provided in front of the ferrule 20.
  • an optical fiber connector maintains the connection state by pressing and fixing the optical fibers 10 and 11 in a connected state.
  • the optical fiber connection structure is a structure in which optical fibers are optically connected using an optical fiber connector.
  • the optical fiber connection structure is configured (manufactured).
  • Optical fibers 10 and 11 are one optical fiber to be connected and another optical fiber.
  • One optical fiber 10 has a rear end built in and fixed to the ferrule 20, and a front end extends into the alignment groove 30 ⁇ / b> A of the alignment member 30.
  • One end face (front end face) of the optical fiber 10 is disposed at a substantially intermediate position in the longitudinal direction of the alignment groove 30A of the alignment member 30 (hereinafter referred to as “connection position T”).
  • the other end surface (rear end surface) of the optical fiber 10 is disposed so as to be exposed from the rear end surface of the ferrule 20.
  • the optical fiber 10 is represented by a dotted line
  • the alignment groove 30A is represented by a one-dot chain line.
  • the other optical fiber 11 is an optical fiber inserted into the alignment groove 30A of the alignment member 30 from the opposite direction (front) to the built-in side optical fiber 10 (hereinafter, the optical fiber 10 and the optical fiber 11).
  • the optical fiber 10 and the optical fiber 11 are referred to as “built-in side optical fiber 10” and “insertion side optical fiber 11”, respectively). Then, the end surface of the optical fiber 11 on the insertion side is inserted to the connection position T and connected so as to abut the end surface of the optical fiber 10 on the built-in side.
  • the optical fiber 11 has the coating film at the tip (end face) removed.
  • the end faces of the optical fibers 10 and 11 have a planar shape cut out perpendicular to the axial direction. Since the end face of the built-in optical fiber 10 is cut at the optical fiber connector manufacturing factory, it is in a mirror surface state that is perpendicular to the optical axis with high accuracy. On the other hand, since the end face of the optical fiber 11 on the insertion side is cut out by an optical fiber cutter at the site where the optical fiber is connected, there is a possibility of having fine irregularities.
  • the optical fibers 10 and 11 are in any state such as an optical fiber strand, an optical fiber core wire, an optical fiber cord, or an optical fiber cable as long as the end faces are exposed so that they can be connected. Also good. Further, the shape of the end faces of the optical fibers 10 and 11 may be a planar shape cut out in an inclined direction with respect to the axial direction. Further, the end surfaces of the optical fibers 10 and 11 may be subjected to a polishing process such as PC polishing. Moreover, you may use what formed the hole in the clad layer of the optical fiber.
  • the material constituting the optical fibers 10 and 11 may be any material such as quartz or plastic. Further, the refractive indexes of the optical fibers 10 and 11 may be different from each other as long as they do not affect the connection characteristics.
  • the ferrule 20 is a member that holds and fixes the built-in optical fiber 10.
  • the ferrule 20 is fixed to the aligning member 30.
  • the ferrule 20 is, for example, a single-core SC type optical connector (JIS C5973) or an FC type optical connector (JIS C5970). If a plurality of optical fibers 10 are connected simultaneously, a multi-fiber MT type optical connector or the like can be used.
  • the ferrule 20 connects the rear end face of the built-in optical fiber 10 and an optical fiber built in another ferrule (not shown) by PC connection.
  • the alignment member 30 is a member for connecting and pressing and fixing optical fibers so that their optical axes coincide.
  • the alignment member 30 includes a base member 31, lid members 32 and 33, and a clamp spring 34.
  • the aligning member 30 forms an aligning groove 30A, an insertion recess 30B, a gap 30C, and a gap 30D according to the shapes of the base member 31 and the cover members 32 and 33.
  • the aligning member 30 is configured to cover the optical fibers 10 and 11 supported by the aligning groove 30 ⁇ / b> A of the base member 31 with cover members 32 and 33 and press and fix them with a clamp spring 34.
  • the base member 31 is a member that supports the optical fibers 10 and 11.
  • the base member 31 has a flat upper surface and faces the lower surfaces of the lid members 32 and 33. Further, a V-groove parallel to the X-axis direction is formed on the upper surface of the base member 31, and this V-groove constitutes the aligning groove 30A. Further, a concave insertion recess 30B is formed on the upper surface of the base member 31 (see FIG. 2).
  • the base member 31 is connected to the ferrule 20 along the longitudinal direction.
  • the lid members 32 and 33 are members that cover the alignment groove 30A of the base member 31 from above, and press and fix the optical fibers 10 and 11 to the alignment groove 30A.
  • the lid members 32 and 33 have a flat bottom surface and face the top surface of the base member 31. Further, the lower surfaces of the lid members 32 and 33 are in contact with the optical fiber disposed in the alignment groove 30A, and press the optical fibers 10 and 11 against the alignment groove 30A.
  • the materials of the base member 31 and the lid members 32 and 33 of the aligning member 30 can be any material such as a plastic material or a metal material.
  • the clamp spring 34 is a spring member that presses the base member 31 and the lid members 32 and 33 so as to be sandwiched from above and below. More specifically, the clamp spring 34 is provided so as to sandwich the base member 31 and the lid members 32, 33 from above and below from below the base member 31 to above the lid members 32, 33. The clamp spring 34 is maintained in a state in which a pressing force is applied to the base member 31 and the lid members 32 and 33 from above and below. Thus, when the insertion member F is removed from the insertion recess 30B, the optical fibers 10 and 11 are pressed and fixed to the lower surfaces of the lid members 32 and 33 and the wall surface of the alignment groove 30A.
  • the alignment groove 30 ⁇ / b> A connects the end faces of the paired optical fibers 10, 11 from the front-rear direction ( ⁇ X direction) of the alignment member 30 and connects the optical fibers 10, 11 so that the optical axes coincide with each other. It is a guide groove to be made.
  • the alignment groove 30A is linearly formed on the upper surface of the base member 31 so as to penetrate from one side surface to the opposite side surface.
  • the built-in optical fiber 10 extending from the ferrule 20 is inserted and fixed on one end side ( ⁇ X side) of the aligning groove 30A, and the other end side (+ X side) of the aligning groove 30A is The optical fiber 11 on the insertion side can be inserted.
  • Alignment groove 30A is formed as a V-groove.
  • the cross-sectional shape of the alignment groove 30A may be a shape other than the V-shape, for example, a rectangular shape or a U-shape.
  • the lid members 32 and 33 may be formed with concave portions or convex portions, and the concave portions or convex portions of the lid members 32 and 33 may be fitted into the alignment grooves 30 ⁇ / b> A of the base member 31.
  • the insertion recess 30B is a groove for inserting the insertion member F and forming a space between the alignment groove 30A and the lid members 32 and 33 (see FIGS. 2A and 2B).
  • the insertion recess 30B is configured by a concave shape at the end on the lateral side (+ Y direction) of the upper surface of the base member 31, and a concave shape at the end on the lateral side (+ Y direction) of the lower surface of the lid members 32 and 33.
  • the insertion recess 30 ⁇ / b> B may be formed on either the upper surface of the base member 31 or the lower surfaces of the lid members 32 and 33.
  • the insertion member F may be inserted between the upper surface of the base member 31 and the lid members 32 and 33 without forming the insertion recess 30B.
  • the insertion member F is a member that is inserted into the insertion recess 30B.
  • the part into which the insertion member F is inserted has a shape that fits into the insertion recess 30B, and can be inserted into the insertion recess 30B.
  • the gap between the base member 31 and the lid members 32 and 33 is pushed open against the urging force of the clamp spring 34, and the alignment groove 30A.
  • the optical fiber 11 on the insertion side is maintained in a state where it can be inserted (FIG. 2A).
  • the insertion-side optical fiber 11 is inserted into the alignment groove 30A and the insertion-side optical fiber 11 and the built-in side fiber 10 are connected with the insertion member F inserted into the insertion recess 30B.
  • the insertion member F is removed from the insertion recess 30B (FIG. 2B)
  • the optical fibers 10 and 11 are pressed and fixed between the alignment groove 30A of the base member 31 and the lower surfaces of the lid members 32 and 33. .
  • gaps 30C and 30D are formed between the upper surface of the base member 31 and the lower surfaces of the lid members 32 and 33.
  • reference numeral 30C is assigned to the gap on the insertion recess 30B side when viewed from the alignment groove 30A
  • reference numeral 30D is assigned to the gap on the opposite side.
  • FIG. 2A in the state where the insertion member F is inserted into the insertion recess 30B, the gaps 30C and 30D are pushed wide to form a relatively wide gap.
  • the gaps 30C and 30D become narrow as shown in FIGS. 2B and 2C.
  • the gap 30C is a gap between the upper surface of the base member 31 and the lower surfaces of the lid members 32 and 33, and is a gap on the insertion recess 30B side as viewed from the alignment groove 30A.
  • the gap 30C is a narrower gap than the insertion recess 30B, and communicates from the insertion recess 30B to the alignment groove 30A.
  • the gap 30C serves as a gap for injecting the liquid refractive index matching agent C1 into the connection position T of the optical fibers 10 and 11 (see FIG. 2C).
  • the liquid refractive index matching agent C1 can be injected into the connection position of the optical fibers 10 and 11 with the optical fibers 10 and 11 being pressed and fixed to the alignment groove 30A by the gap 30C.
  • the liquid refractive index matching agent C1 penetrates into the gap 30C by capillary action and is injected into the connection portion of the optical fibers 10 and 11.
  • the gap 30D is a gap between the upper surface of the base member 31 and the lower surfaces of the lid members 32 and 33, and is a gap on the side opposite to the insertion recess 30B side when viewed from the alignment groove 30A.
  • the gap 30D is a narrower gap than the insertion recess 30B.
  • the gap 30D communicates with the alignment groove 30A.
  • the gap 30D serves as a gap for allowing the liquid refractive index matching agent C1 to escape from the connection position T of the optical fibers 10 and 11 (see FIG. 2C). In other words, a part of the liquid refractive index matching agent C1 introduced into the alignment groove 30A from the gap 30C can be drained by the gap 30D (details will be described later with reference to FIG. 4C).
  • FIG. 3 is a work flow diagram of the optical fiber connection method in the first embodiment.
  • the optical fiber connection process of the first embodiment includes a preparation step S1, an insertion step S2, a connection step S3, a pressing step S4, an injection step S5, and a solidification step S6 in time series order.
  • the preparation step S1, the insertion step S2, the connection step S3, the pressing step S4, and the injection step S5 are steps performed by the operator, and the solidification step S6 is time-consuming without requiring the operator's work. It is a process made by progress.
  • the optical connection between the optical fibers 10 and 11 is made by penetrating the liquid refractive index matching agent C1 into the connection portion of the optical fibers 10 and 11 with the optical fibers 10 and 11 being pressed and fixed. Loss can be reduced (see FIG. 4).
  • Preparation step S1 is a step of preparing the optical fiber connector shown in FIG. As shown in FIGS. 1 and 2A, the alignment member 30 of the prepared optical fiber connector is in a state where the insertion member F is inserted into the insertion recess 30B. In the preparation step S1, pretreatment of the optical fiber 11 on the insertion side shown in FIG. 1 is also performed. As a pretreatment of the optical fiber 11, a step of removing the coating film at the tip portion of the optical fiber 11 and extracting the bare optical fiber, and using an optical fiber cutter, the optical fiber 11 is subjected to initial cleavage for cleavage.
  • a step of attaching a scratch and a step of cutting at a portion of the optical fiber 11 where the initial scratch for cleavage is applied are performed using an optical fiber cutter.
  • the reason why the optical fiber 11 on the insertion side is cut is to adjust the optical fiber 11 to a necessary length and expose a flat surface without contamination on the end face of the optical fiber 11.
  • the end face cut out using the optical fiber cutter may have fine unevenness when viewed microscopically.
  • the insertion step S2 is a step of inserting the optical fiber 11 on the insertion side into the alignment groove 30A of the alignment member 30. Since the insertion member F is inserted into the insertion recess 30B of the alignment member 30, the insertion-side optical fiber 11 can be inserted into the alignment groove 30A (see FIG. 2A).
  • the connection step S3 is a step in which the end face of the insertion-side optical fiber 11 is abutted with the end face of the built-in side optical fiber 10 disposed in the alignment groove 30A.
  • the insertion-side optical fiber 11 is positioned in front of the alignment member 30. Will bend. For this reason, if the operator inserts the insertion-side optical fiber 11 into the alignment groove 30A until the insertion-side optical fiber 11 bends in front of the alignment member 30, the end surface of the insertion-side optical fiber 11 becomes the built-in side.
  • the end face of the optical fiber 10 is abutted.
  • a slight gap is formed between the end surfaces of the optical fibers 10 and 11 because the end surface of the optical fiber 11 on the insertion side is rough.
  • the pressing step S4 is a step of holding the connected state by pressing and fixing the connected optical fibers 10 and 11 to the alignment groove 30A.
  • the pressing step S4 is specifically a step of removing the insertion member F from the insertion recess 30B of the alignment member 30. Accordingly, the clamp spring 34 presses the base member 31 and the lid members 32 and 33 so as to be sandwiched from above and below, and presses and fixes the connected optical fibers 10 and 11 to the alignment groove 30A.
  • the insertion member F is removed from the insertion recess 30B, the gaps 30C and 30D become narrow as shown in FIGS. 2B and 2C.
  • Injection step S5 is a step of injecting the liquid refractive index matching agent C1 into the connection position T of the optical fibers 10 and 11.
  • the liquid refractive index matching agent C1 is contained inside through the gap 30C.
  • the liquid refractive index matching agent C1 is introduced into the connection position T of the optical fibers 10 and 11 in the alignment groove 30A. Then, the liquid refractive index matching agent C1 penetrates into a fine gap between the end faces of the optical fibers 10 and 11 by capillary action.
  • FIG. 5A and 5B are explanatory diagrams of a comparative example.
  • the liquid refractive index matching agent is injected in advance before connecting the optical fiber, and the end of the insertion-side optical fiber is inserted into the liquid refractive index matching agent injected in advance.
  • FIG. 5A shows a state in which the liquid refractive index matching agent Z1 is injected before inserting the optical fiber Z2.
  • FIG. 5B shows a state where the bubble Z3 is taken into the end face of the optical fiber Z2 when the optical fiber Z2 is inserted.
  • the end portion of the optical fiber is not inserted into the liquid refractive index matching agent injected in advance as in the comparative example, but after the optical fibers 10 and 11 are abutted, the optical fiber 10 , 11 is filled with a liquid refractive index matching agent. Thereby, introduction
  • 4A to 4C are explanatory diagrams of the injection path of the liquid refractive index matching agent C1.
  • 4A to 4C show the permeation state of the liquid refractive index matching agent C1 on the lower side of the lid member 32.
  • the right figure of each figure has shown the osmosis
  • the liquid refractive index matching agent is injected into the portion where the insertion member F is inserted (the insertion recess 30B). For this reason, the insertion member F does not get in the way when the liquid refractive index matching agent C1 is injected.
  • the liquid refractive index matching agent C1 is injected, so that the liquid phenomenon occurs due to capillary action. The refractive index matching agent C1 easily penetrates.
  • a liquid refractive index matching agent is injected into the insertion recess 30B for inserting the insertion member F. For this reason, when the liquid refractive index matching agent is injected, the liquid refractive index matching agent C1 can be prevented from flowing out, and the outer peripheral surface of the alignment member 30 can be prevented from being stained with the liquid refractive index matching agent C1. it can.
  • the liquid refractive index matching agent C1 further penetrates into the inside from the gap 30C and penetrates between the end faces of the optical fibers 10 and 11. Since the end faces of the optical fibers 10 and 11 are abutted in the connection step S3 described above, the gap between the end faces of the optical fibers 10 and 11 is very small. The liquid refractive index matching agent C1 penetrates into the gap. As a result, gas (bubbles) is hardly formed between the end faces of the optical fibers 10 and 11.
  • the liquid refractive index matching agent C1 penetrates further into the inner side of the alignment groove 30A and penetrates into the gap 30D between the upper surface of the base member 31 and the lower surface of the lid member 32.
  • the gap 30D is narrower than the insertion recess 30B, and the liquid refractive index matching agent C1 penetrates into the gap 30D by capillary action.
  • the liquid refractive index matching agent C1 permeates into the gap 30D by capillary action, so that the liquid refractive index matching agent C1 is supplied to the gap 30D from between the end faces of the optical fibers 10 and 11. It will be.
  • the liquid refractive index matching agent C1 permeates into the gap 30D by capillary action, so that the optical fibers 10 and 11 are filled.
  • the liquid refractive index matching agent C1 continues to flow between the end faces. 4B, even if gas remains between the end faces of the optical fibers 10 and 11 at the stage of FIG. 4B and bubbles are formed on the end faces of the optical fibers, the liquid refractive index matching agent C1 as shown in FIG. 4C. Since the bubbles in the end face of the optical fiber flow into the back together with the liquid refractive index matching agent C1, the bubbles on the end face of the optical fiber can be removed.
  • Solidification step S6 is a step of solidifying the liquid refractive index matching agent C1.
  • deterioration of the liquid refractive index matching agent C1 can be suppressed, and the optical connection state of the optical fibers 10 and 11 can be stabilized.
  • a volatile material is used as the liquid refractive index matching agent C1. For this reason, since the liquid refractive index matching agent C1 is solidified by evaporating the solvent after a lapse of a certain time from the injection, a solidification operation by an operator is unnecessary.
  • the liquid refractive index matching agent is injected from the product shipment stage of the optical fiber connector (for example, in the case of the comparative example), the liquid refractive index matching agent is solidified before the optical fiber is connected. Therefore, it is necessary to employ a liquid refractive index matching agent that does not solidify.
  • the liquid refractive index matching agent is filled between the end faces of the optical fibers 10 and 11 after the optical fibers 10 and 11 are abutted with each other, for example, solidification like a volatile material is performed. Possible liquid refractive index matching agents can be employed.
  • the liquid refractive index matching agent C1 is a member that is injected into the connection portion after the optical fibers 10 and 11 are connected, and fills a fine gap generated in the connection portion of the optical fibers 10 and 11.
  • the liquid refractive index matching agent C1 is fixed to the connection portion of the optical fibers 10 and 11, and performs the refractive index matching of the connection portion of the optical fibers 10 and 11.
  • the liquid refractive index matching agent C1 is more preferably an acrylic or silicone polymer material, for example, from the viewpoint of adhesion to an optical fiber and environmental resistance.
  • polymer materials such as epoxy, vinyl, rubber, urethane, methacryl, nylon, bisphenol, diol, polyimide, fluorinated epoxy, and fluorinated acrylic can be used.
  • a combination of these polymer materials or a combination of these polymer materials with other materials may also be used.
  • the polymer materials listed above have wettability with respect to glass (optical fibers 10 and 11), and are injected into the connection portions of the optical fibers 10 and 11 by capillary action in the injection step S5. .
  • the liquid refractive index matching agent C1 is preferably formed so that the viscosity at the time of injection is 300 mPa ⁇ s or less.
  • the viscosity can be adjusted by, for example, adding an additive (plasticizer or lubricant) to the refractive index matching agent.
  • it can also be carried out by emulsifying a resin having refractive index matching with water.
  • the liquid refractive index matching agent C1 is a material that solidifies after injection and is fixed to the connection portion of the optical fibers 10 and 11. Thereby, the connection part (between the end faces) of the optical fibers 10 and 11 is stably maintained, and a good connection state can be maintained for a long time.
  • the characteristics for solidifying after injection include a resin that cures by reacting with air and moisture, a volatile material, an ultraviolet curable resin, a thermoplastic resin, and a thermosetting resin. Note that any of the above-described polymer materials can have any of these characteristics depending on selection of a solvent or the like, and can function as an adhesive. However, when the liquid refractive index matching agent C1 is held in a stable state by surface tension, it does not necessarily have to be solidified.
  • the refractive index of the liquid refractive index matching agent C1 is set such that the refractive index difference between the optical fibers 10 and 11 is within ⁇ 0.1 in order to avoid Fresnel reflection at the end faces of the optical fibers 10 and 11. More desirably, the refractive index difference is adjusted to be within ⁇ 0.05.
  • the refractive index of the liquid refractive index matching agent C1 is different from the average value of the refractive indexes of the optical fibers 10 and 11 to be connected by ⁇ . It is desirable to be within 0.1.
  • the refractive index of the refractive index matching agent can be adjusted by changing the components and composition ratios contained in the refractive index matching agent.
  • the refractive index can be adjusted by mixing a low refractive index epoxy or acrylic polymer material with a high refractive index vinyl polymer material and adjusting the composition ratio.
  • the refractive index can also be adjusted by changing the sulfur content or fluorine content of the epoxy polymer material.
  • the liquid refractive index matching agent C1 is formed in the gap (gap 30C) between the base member 31 and the lid member 32. Is injected between the end faces of the optical fibers 10 and 11 (see FIGS. 4A to 4C). For this reason, according to the optical fiber connection method of the present embodiment, bubbles are not taken into the end face of the optical fiber 11 as in the comparative example (see FIG. 5B). Further, in the optical fiber connection method of the present embodiment, the liquid refractive index matching agent C1 permeates into a very small gap between the end faces of the optical fibers 10 and 11 by capillary action. The liquid refractive index matching agent C1 is easily filled in the gap, and bubbles are hardly formed on the end face of the optical fiber.
  • the liquid in the injection step S5, the liquid is made up to the gap 30D (the gap opposite to the side where the liquid refractive index matching agent is injected as viewed from the alignment groove 30A).
  • a refractive index matching agent is infiltrated (see FIG. 4C).
  • the optical fibers 10 and 11 are optically connected by the aligning member 30 of the optical fiber connector to constitute (manufacture) the optical fiber connection structure. According to such a method for manufacturing an optical fiber connection structure, since bubbles are hardly formed on the end face of the optical fiber, an optical fiber connection structure with reduced optical connection loss can be manufactured.
  • the connection portions of the optical fibers 10 and 11 are caused by deterioration with time of the liquid refractive index matching agent C1.
  • the gap can be filled by reinjecting the liquid refractive index matching agent C1 into the connection portion of the optical fibers 10 and 11.
  • the method of reinjecting the liquid refractive index matching agent C1 is the same as in the above embodiment.
  • the liquid refractive index matching agent C1 permeates through the gap 30C, and the optical fiber of the alignment groove 30A.
  • the liquid refractive index matching agent C1 is filled in the gap between the end surfaces 10 and 11 (the gap generated in the connection portion of the optical fibers 10 and 11 due to the deterioration of the liquid refractive index matching agent C1 over time). Thereby, the optical connection loss can be recovered. At this time, the liquid refractive index matching agent C1 may be injected while measuring the optical connection loss.
  • FIG. 6 is a top view of the base member 31 according to the second embodiment.
  • 7A and 7B are explanatory diagrams of the optical fiber connection method according to the second embodiment.
  • an alignment groove 31 is formed on the upper surface of the base member 31.
  • a housing groove 312 is formed on the upper surface of the base member 31 of the second embodiment.
  • the accommodation groove 312 accommodates a string-like wet member 35, and the wet member 35 is wetted with a liquid refractive index matching agent C1.
  • the accommodating groove 312 is a groove for accommodating the wetting member 35 and is a groove parallel to the alignment groove 31.
  • the housing groove 312 is formed at least in the vicinity of the end face of the internal optical fiber 10.
  • the wet member 35 wetted with the liquid refractive index matching agent C1 is also disposed in the vicinity of the end face of the internal optical fiber 10.
  • the storage groove 312 has a rectangular shape with a width of about 0.5 to 1.0 mm and a length of about 3 mm, for example, when viewed from above.
  • the depth of the accommodation groove 312 is shallower than the diameter of the wet member 35.
  • the wet member 35 has a diameter of about 1.0 mm, and the depth of the receiving groove 312 is about 0.8 mm.
  • the wetting member 35 is accommodated in the accommodating portion while protruding at least partially from the accommodating groove 312 (see FIG. 7A). That is, a part of the wet member 35 protruding from the housing groove 312 is disposed in the gap between the base member 31 and the lid member 32 (see FIG. 7A).
  • the insertion-side optical fiber 11 is inserted into the alignment groove 30A of the alignment member 30 (insertion step S2), and the end surface of the insertion-side optical fiber 11 is replaced with the end surface of the built-in side optical fiber 10.
  • the insertion member F is removed from the insertion recess 30B of the alignment member 30, and the connected optical fibers 10 and 11 are pressed and fixed to the alignment groove 30A (pressing step S4).
  • the gap between the base member 31 and the lid member 32 is narrowed, and the wet member 35 protruding from the housing groove 312 is pressed from the lid member 32 (see FIG. 7B). ).
  • the liquid refractive index matching agent C1 Since the liquid refractive index matching agent C1 is wetted in advance on the wet member 35, when the wet member 35 is pressed from the lid member 32, the liquid refractive index matching agent C1 is squeezed out of the wet member 35.
  • the liquid refractive index matching agent C1 is injected into the connection position of the optical fibers 10 and 11 (see FIG. 7B: injection step). Therefore, in the second embodiment, even if the operator does not inject the liquid refractive index matching agent C1 as in the first embodiment, if the pressing process is performed, the liquid is formed in the gap between the base member 31 and the lid member 32.
  • the refractive index matching agent C1 can be injected to fill the space between the end faces of the optical fibers 10 and 11 with the liquid refractive index matching agent C1.
  • the housing groove 312 and the wetting member 35 are preferably arranged on the side where the insertion member F is inserted as viewed from the alignment groove 30A.
  • the liquid refractive index matching agent C1 squeezed from the wet member 35 penetrates into the narrow gap side (left side in FIG. 7B) by capillary action, and the liquid refractive index matching agent C1 becomes the optical fibers 10 and 11. It becomes easy to be injected into the connection position.
  • the gap between the base member 31 and the lid member 32 in a state where the insertion member F is inserted is narrower than the outer diameter of the wet member 35.
  • a slip stopper is formed in the accommodation groove 312.
  • a plurality of convex portions 312A are formed on the bottom surface of the housing groove 312.
  • the wet member obtained by wetting the liquid refractive index matching agent has a string shape, but the wet member may be a rectangular parallelepiped sponge member, for example. Further, the wetting member 35 may be disposed not on the base member 31 side but on the lid member 32 side. Further, the wetting member 35 may be disposed between the base member 31 and the lid member 32 even if it is not housed in the housing groove 312.
  • FIG. 8A to 8D are explanatory views showing the functions of the liquid refractive index matching agent C1 and the solid refractive index matching material C2 of the third embodiment.
  • FIG. 8A shows the insertion step S2.
  • FIG. 8B shows the connection step S3.
  • FIG. 8C shows the implantation step S5.
  • FIG. 8D shows the solidification step S6.
  • a film-like solid refractive index matching material C2 is attached in advance to the end face of the built-in optical fiber 10 (FIG. 8A).
  • the end face of the optical fiber 11 on the insertion side comes into contact with the solid refractive index matching material C2, and the optical fibers 10 and 11 are connected via the solid refractive index matching material C2.
  • the solid refractive index matching material C2 functions as a stress relieving material when the insertion-side optical fiber 11 is inserted, and reduces the impact force on the end face of the built-in side optical fiber 10.
  • the solid refractive index matching material C2 is deformed so as to follow the shape of the end face of the optical fiber 11, and the optical fiber 11 Close contact with the end face. Even if the end face of the optical fiber 11 on the insertion side has fine irregularities, the solid refractive index matching material C2 is deformed according to the irregularities, so that the solid refractive index matching material C2 and the end face of the optical fiber 11 There is almost no gap (gas) between them.
  • the solid refractive index matching material C2 since the solid refractive index matching material C2 has a partial spherical shape with a protruding central portion, the solid refractive index matching material C2 is mainly composed of the central region (core) of the end face of the optical fiber 11. Layer 11a or mode field diameter portion). In this embodiment, the solid refractive index matching material C2 is in a state where the outer peripheral regions (cladding layers 10b and 11b) of the end faces of the optical fibers 10 and 11 are not in contact with each other.
  • the insertion member F is removed from the insertion recess 30B of the alignment member 30 (see FIG. 2B), and the optical fibers 10 and 11 are aligned by the lid members 32 and 33 with the alignment groove 30A. It is pressed and fixed inside.
  • the liquid refractive index matching agent C1 is injected from the insertion recess 30 from which the insertion member F has been removed (see FIG. 2C)
  • the liquid refractive index matching agent C1 is contained inside through the gap 30C.
  • the liquid refractive index matching agent C1 is filled in the gap between the end faces of the optical fibers 10 and 11 connected via the solid refractive index matching material C2 (FIG. 8C).
  • the liquid refractive index matching material C1 is filled between the solid refractive index matching material C2 attached to the end face of the built-in side optical fiber 10 and the end face of the optical fiber 11 on the insertion side.
  • the gap between the solid refractive index matching material C2 and the end face of the optical fiber 11 on the insertion side is fine, once the liquid refractive index matching agent C1 is filled, the liquid refractive index matching agent C1 is exposed to the surface. It becomes easy to be fixed in the gap by tension.
  • each of the liquid refractive index matching agent C1 and the solid refractive index matching material C2 functions as a refractive index matching agent in the connection portion of the optical fibers 10 and 11, and improves the connection characteristics.
  • liquid refractive index matching agent C1 the same material and characteristics as those described in the first embodiment can be used.
  • the solid refractive index matching material C2 is a member that deforms along the shape of the end face of the optical fibers 10 and 11 when the optical fibers 10 and 11 are abutted with each other, and reduces the gap at the connection portion of the optical fibers 10 and 11. It is.
  • the solid refractive index matching material C2 has refractive index matching (with a refractive index close to) the optical fibers 10 and 11 to be connected in the same manner as the liquid refractive index matching agent C1, thereby improving connection characteristics.
  • the solid refractive index matching material C2 may be a solid material (having a large viscosity) formed of the same material as the liquid refractive index matching agent C1 described above.
  • the solid refractive index matching material C2 is desirably an acrylic or silicone polymer material from the viewpoints of adhesion to an optical fiber and environmental resistance, and other materials such as epoxy, vinyl, and rubber.
  • High molecular weight materials such as polyurethane, methacrylic, nylon, bisphenol, diol, polyimide, fluorinated epoxy, and fluorinated acrylic, or combinations thereof can also be used.
  • the solid refractive index matching material C2 and the liquid refractive index matching agent C1 may be made of different materials or the same material as long as they can perform the functions described above.
  • the surface may be activated by performing UV irradiation, plasma treatment, or the like on the solid refractive index matching material C2.
  • the refractive index matching property of the solid refractive index matching material C2 is such that the difference in refractive index from the optical fibers 10 and 11 is within ⁇ 0.1, more preferably ⁇ 0, like the liquid refractive index matching agent C1. .05 or less.
  • FIG. 9 is an explanatory diagram of the relationship between the hardness and thickness of the solid refractive index matching material C2 of the third embodiment.
  • the horizontal axis indicates the thickness of the solid refractive index matching material C1
  • the vertical axis indicates the Shore hardness E (JIS K6253).
  • the solid refractive index matching material C2 those having hardness and thickness that become the R1 region and the R2 region (region surrounded by the thick line) in FIG. 9 can be suitably used.
  • the impact mitigating effect by the abutment of the optical fiber 11 cannot be sufficiently obtained.
  • the solid refractive index matching material C2 in the region R3 is used, the impact due to the abutment of the optical fiber 11 can be reduced as compared with the case where there is no solid refractive index matching material C2.
  • the hardness is too high, and the follow-up deformation with respect to the unevenness of the end face of the optical fiber 11 on the insertion side becomes insufficient.
  • the gap between the end faces of the optical fibers 10 and 11 can be made finer than in the case where there is no solid refractive index matching material C2.
  • the liquid refractive index matching agent C1 easily penetrates into the gap due to capillary action.
  • the region R5 region having a thickness smaller than 20 ⁇ m
  • the impact caused by the abutment of the optical fiber 11 can be reduced as compared with the case where there is no solid refractive index matching material C2.
  • the region R6 region where the thickness is larger than 60 ⁇ m
  • it is too thick so that the position of the end of the optical fiber 11 becomes difficult to stabilize, and the alignment accuracy may be lowered.
  • the region R7 region on the side thicker than the straight line LP connecting the points P1 and P2
  • the position of the end portion of the optical fiber 11 becomes difficult to stabilize, and the alignment accuracy may be lowered. is there.
  • the solid refractive index matching material C2 in the regions R6 and R7 is used, the gap between the end faces of the optical fibers 10 and 11 is made finer than in the case where there is no solid refractive index matching material C2.
  • the liquid refractive index matching agent C1 can easily penetrate into the gap due to capillary action.
  • the region R1 and the region R2 have appropriate hardness and thickness of the solid refractive index matching material C2. That is, the solid refractive index matching material C2 has (thickness 20 ⁇ m, Shore hardness E: 30), (thickness 20 ⁇ m, Shore hardness E: 85), (thickness 40 ⁇ m, Shore hardness E: 85), (thickness). Those within a range surrounded by four points of 60 ⁇ m and Shore hardness E: 30) can be suitably used.
  • the solid refractive index matching material C2 in the region R2 can be suitably used when the optical fiber 11 on the insertion side is an optical fiber with holes (for example, hole-assisted fiber: HAF).
  • HAF hole-assisted fiber
  • the insertion-side optical fiber 11 is a holey optical fiber
  • a hole is opened at the end face, and a solid refractive index matching material C2 enters the hole, whereby light on the insertion side with respect to the built-in side optical fiber 10 is inserted.
  • the position of the fiber 11 is stabilized, and the alignment accuracy is stabilized.
  • the solid refractive index matching material C2 in the region R2 can be suitably used.
  • the solid refractive index matching material C2 has a partially spherical shape protruding toward the tip side so that the top is formed on the extension of the optical axis of the optical fiber 10 on the built-in side (see FIG. 8A). ). Since the central portion protrudes so that the top of the solid refractive index matching material C2 is positioned on the optical axis of the optical fiber, the central region of the end surface of the solid refractive index matching material C2 and the optical fiber 11 on the insertion side (Core layer 11a or mode field diameter portion) can be brought into close contact with each other, and bubbles are hardly formed on the optical axis.
  • region (cladding layer 10b, 11b) of the end surface of the optical fibers 10 and 11 can be made not to contact by this, the edge which protruded sharply to the outer peripheral part of the end surface of the optical fiber 11 cut
  • the shape of the solid refractive index matching material C2 may be formed in a uniform film thickness instead of the partial spherical shape.
  • FIG. 10 is an explanatory diagram of a method of forming a solid refractive index matching material C2 according to the third embodiment.
  • the formation process of solid refractive index matching material C2 is a process performed not in the connection site of an optical fiber but in the manufacturing factory of an optical fiber connector.
  • a liquid refractive index matching agent is attached to the end of the built-in side optical fiber 10 before being accommodated in the aligning member 30, and the liquid refractive index matching agent is solidified, whereby the built-in side optical fiber is solidified.
  • a solid refractive index matching material C2 having a partially spherical shape can be formed at the end portion of 10. When bubbles are taken into the end face of the optical fiber 10 as shown in FIG.
  • the liquid refractive index matching agent when the liquid refractive index matching agent is attached to the end of the optical fiber 10, such a defect is caused. It is preferable to manufacture the optical fiber connector using only the optical fiber 10 with a normal solid refractive index matching material C2 having no bubbles and eliminating the optical fiber 10 in a quality inspection process or the like. Alternatively, a voltage may be applied between the optical fiber 10 and the liquid refractive index matching agent, and a liquid droplet of the liquid refractive index matching agent may be electrostatically adsorbed to the end of the built-in optical fiber 10.
  • the solid refractive index matching material C2 may be formed by other methods, for example, coating methods (printing, spray electrostatic coating, etc.), vapor deposition methods (chemical vapor deposition, physical vapor deposition, etc.), films You may use sticking etc. of.
  • the gap between the end faces of the optical fibers 10 and 11 can be reduced by the solid refractive index matching material C2.
  • the refractive index matching agent C1 is likely to penetrate between the end faces of the optical fibers 10 and 11 by capillary action.
  • optical fiber connection method manufactured method of the optical fiber connection structure
  • Alignment members 30 Alignment members 30.
  • FIG. 11 is a top view of the base member 31 according to the fourth embodiment.
  • the alignment groove 30A and the insertion recess 30B are formed on the upper surface of the base member 31 ′ of the fourth embodiment.
  • an injection groove 311 ′ is formed on the upper surface of the base member 31 ′.
  • the injection groove 311 ′ is a groove for guiding the liquid refractive index matching agent C1 (see FIG. 2C) injected into the insertion recess 30B to the joint portion of the optical fibers 10 and 11.
  • the injection groove 311 ′ is formed between the alignment groove 30A and the insertion recess 30B, and is formed in a direction parallel to the Y axis.
  • the injection groove 311 ′ is formed so as to match the position of the front end of the built-in optical fiber 10 (position of the connection position T). Specifically, the front end of the built-in optical fiber 10 is located between the front edge and the rear edge in the X-axis direction of the injection groove 311 ′.
  • the depth of the injection groove 311 ′ is shallower than the depth of the insertion recess 30 ⁇ / b> B formed on the upper surface of the base member 31. Therefore, the liquid refractive index matching agent C1 injected from the insertion recess 30B penetrates the gap 30C between the upper surface of the injection groove 311 ′ and the lower surface of the lid member 32 by capillary action, and the optical fiber 10, 11 is injected into the connecting portion.
  • optical fiber connection method (manufacturing method of the optical fiber connection structure) described in the above embodiment can be used for various types of optical fiber connectors (alignment members 30).
  • FIGS. 12A and 12B are explanatory views of the aligning member 30 ′′ of the fifth embodiment.
  • FIG. 12A shows the configuration of the aligning member 30 ′′ as viewed from above.
  • FIG. 12B shows a side view of the aligning member 30 ′′ cut at the position BB ′.
  • the optical fiber connector of the fifth embodiment is a so-called mechanical splice.
  • the optical fiber 10 is used.
  • the optical fibers 10 ′′ and 11 ′′ to be connected are not preliminarily built in the aligning member 30 ′′ and are aligned in the aligning groove 30A ′′. Can be inserted from both directions.
  • the alignment member 30 ′′ includes a base member 31 ′′, three lid members 32 ′′, and a clamp spring 34 ′′.
  • the alignment member 30 ′′ is formed by the base member 31 ′′ and the three lid members 32 ′′.
  • An insertion recess 30B ′′, a gap 30C ′′, and a gap 30D ′′ are formed.
  • the role and function of each member is the same as in the first embodiment.
  • the alignment groove 30A ′′ is linearly formed on the upper surface of the base member 31 ′′ so as to penetrate from the one side surface to the opposite side surface so that the optical fibers 10 ′′ and 11 ′′ can be inserted from both sides. . Then, the optical fiber 10 ′′ is inserted from one side of the alignment groove 30A ′′ penetrating linearly, and the optical fiber 11 ′′ is inserted from the other side so that the end faces of the optical fibers 10 ′′ and 11 ′′ are abutted.
  • the optical fibers 10 "and 11" are pressed and fixed in the aligning groove 30A ", the three cover members 32" are covered so as to cover the aligning groove 30A "of the base member 31". Is attached and clamped from above and below by a clamp spring 34 ". According to the alignment member 30 ′′, the optical fibers 10 ′′ and 11 ′′ that are not built in the ferrule can be connected to each other.
  • the alignment member 30 is configured such that the base member 31 and the lid members 32 and 33 are configured separately.
  • the alignment member 30 may be formed integrally with the base member 31 and the lid members 32 and 33.
  • the base member 31 and the lid members 32 and 33 are names referring to the roles of the members, and may be integrally formed of the same material.
  • the aspect which uses the clamp spring 34 as a structure for pressingly fixing an optical fiber with the base member 31 and the cover members 32 and 33 was shown.
  • the fixing method can be variously modified.
  • a plurality of pairs of optical fibers may be connected.
  • a plurality of alignment grooves 30A for connecting a plurality of pairs of optical fibers are formed on the aligning member, the end faces of the plurality of pairs of optical fibers are butted together, and the plurality of pairs of optical fibers are pressed.
  • a method of injecting a liquid refractive index matching agent C1 in a fixed state can be used. According to this method, it is possible to fill the gaps formed in the connecting portions of the plurality of pairs of optical fibers with the liquid refractive index matching agent C1 in a single process.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Mechanical Coupling Of Light Guides (AREA)

Abstract

La présente invention a trait à un procédé de connexion de fibres optiques qui comprend : une étape d'introduction consistant à introduire une première fibre optique entre un élément de base et un élément capot ; une étape de connexion consistant à abouter, dans une rainure de centrage de l'élément de base, une surface d'extrémité de la première fibre optique et une surface d'extrémité d'une seconde fibre optique différente de la première ; une étape de pressage consistant à presser et à fixer ladite première fibre optique et ladite seconde fibre optique dans la rainure de centrage au moyen de l'élément de base et de l'élément capot, dans un état où la surface d'extrémité de la seconde fibre optique différente de la première fibre optique est aboutée ; et une étape d'injection consistant à injecter un agent d'adaptation d'indice de réfraction sous la forme d'un liquide dans un espace entre ledit élément de base et ledit élément capot pour placer l'agent d'adaptation d'indice de réfraction sous la forme d'un liquide entre la surface d'extrémité de la première fibre optique et la surface d'extrémité de la seconde fibre optique.
PCT/JP2016/084108 2015-11-19 2016-11-17 Procédé de connexion de fibres optiques, et procédé de fabrication d'une structure de connexion de fibres optiques WO2017086388A1 (fr)

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JPH0315017A (ja) * 1990-05-24 1991-01-23 Furukawa Electric Co Ltd:The 光線路切替装置
JPH04116608A (ja) * 1990-09-07 1992-04-17 Sumitomo Electric Ind Ltd 光コネクタ
JPH1172641A (ja) * 1997-07-04 1999-03-16 Nippon Telegr & Teleph Corp <Ntt> メカニカルスプライス部品
JP2005250294A (ja) * 2004-03-05 2005-09-15 Chugoku Electric Power Co Inc:The 光ファイバ接続部分の補強部材及び光ファイバ接続部分の補強方法
JP2009204943A (ja) * 2008-02-28 2009-09-10 Active Inc 光ファイバ用スリーブ及びコアピン
JP2009216923A (ja) * 2008-03-10 2009-09-24 Hitachi Cable Ltd 光コネクタ
WO2010137375A1 (fr) * 2009-05-28 2010-12-02 コニカミノルタオプト株式会社 Connecteur optique et tomographe optique
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JPH0315017A (ja) * 1990-05-24 1991-01-23 Furukawa Electric Co Ltd:The 光線路切替装置
JPH04116608A (ja) * 1990-09-07 1992-04-17 Sumitomo Electric Ind Ltd 光コネクタ
JPH1172641A (ja) * 1997-07-04 1999-03-16 Nippon Telegr & Teleph Corp <Ntt> メカニカルスプライス部品
JP2005250294A (ja) * 2004-03-05 2005-09-15 Chugoku Electric Power Co Inc:The 光ファイバ接続部分の補強部材及び光ファイバ接続部分の補強方法
JP2009204943A (ja) * 2008-02-28 2009-09-10 Active Inc 光ファイバ用スリーブ及びコアピン
JP2009216923A (ja) * 2008-03-10 2009-09-24 Hitachi Cable Ltd 光コネクタ
WO2010137375A1 (fr) * 2009-05-28 2010-12-02 コニカミノルタオプト株式会社 Connecteur optique et tomographe optique
WO2015163348A1 (fr) * 2014-04-22 2015-10-29 株式会社フジクラ Structure de connexion de fibre optique

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