WO2005050273A1 - 光学接続構造および光学接続方法 - Google Patents
光学接続構造および光学接続方法 Download PDFInfo
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- WO2005050273A1 WO2005050273A1 PCT/JP2004/017065 JP2004017065W WO2005050273A1 WO 2005050273 A1 WO2005050273 A1 WO 2005050273A1 JP 2004017065 W JP2004017065 W JP 2004017065W WO 2005050273 A1 WO2005050273 A1 WO 2005050273A1
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- Prior art keywords
- optical
- adhesive
- connection
- optical fiber
- optical transmission
- Prior art date
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Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
-
- 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
- G02B6/3807—Dismountable connectors, i.e. comprising plugs
- G02B6/381—Dismountable connectors, i.e. comprising plugs of the ferrule type, e.g. fibre ends embedded in ferrules, connecting a pair of fibres
- G02B6/3818—Dismountable connectors, i.e. comprising plugs of the ferrule type, e.g. fibre ends embedded in ferrules, connecting a pair of fibres of a low-reflection-loss type
- G02B6/382—Dismountable connectors, i.e. comprising plugs of the ferrule type, e.g. fibre ends embedded in ferrules, connecting a pair of fibres of a low-reflection-loss type with index-matching medium between light guides
-
- 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
-
- 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
-
- 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
- G02B6/3628—Mechanical coupling means for mounting fibres to supporting carriers
- G02B6/3632—Mechanical coupling means for mounting fibres to supporting carriers characterised by the cross-sectional shape of the mechanical coupling means
- G02B6/3636—Mechanical coupling means for mounting fibres to supporting carriers characterised by the cross-sectional shape of the mechanical coupling means the mechanical coupling means being grooves
-
- 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
- G02B6/3628—Mechanical coupling means for mounting fibres to supporting carriers
- G02B6/3648—Supporting carriers of a microbench type, i.e. with micromachined additional mechanical structures
- G02B6/3652—Supporting carriers of a microbench type, i.e. with micromachined additional mechanical structures the additional structures being prepositioning mounting areas, allowing only movement in one dimension, e.g. grooves, trenches or vias in the microbench surface, i.e. self aligning supporting carriers
-
- 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
- G02B6/3807—Dismountable connectors, i.e. comprising plugs
- G02B6/3873—Connectors using guide surfaces for aligning ferrule ends, e.g. tubes, sleeves, V-grooves, rods, pins, balls
- G02B6/3874—Connectors using guide surfaces for aligning ferrule ends, e.g. tubes, sleeves, V-grooves, rods, pins, balls using tubes, sleeves to align ferrules
- G02B6/3877—Split sleeves
Definitions
- the present invention relates to an optical connection structure in which optical transmission media are connected to each other or an optical component and an optical component, and an optical connection method for forming the same.
- a method of connecting optical fibers a method of physically connecting optical fibers or ferrules into which optical fibers are inserted by abutting each other is generally used.
- Examples of such a case include mechanical splices and optical connectors.
- Mechanical splices are generally effective for permanent connections, and optical connectors are effective for frequent attachment and detachment. Have been.
- physical connection is made by applying an axial pressing force to the end face of the optical fiber.
- the optical fiber is generally brittle and weak, so the optical fiber is inserted into the ferrule. To provide physical contact at the end face of the optical fiber.
- the positioning accuracy and the end face shape of the optical fiber greatly affect the connection characteristics. For example, if the angle of the end face is misaligned or the end face shape is rough, air enters between the abutted ends of the optical fibers, and the Fresnel reflection at the connection end face increases, resulting in a large connection loss. There is.
- a silicone-based or paraffin-based liquid or Darrys-like material is generally used as the refractive index matching agent, so that it is fixed on the end face of the optical fiber having a very small area. It is difficult to apply an amount of refractive index matching agent. If the refractive index matching agent is applied excessively, there is a problem of contamination around the connection portion and adhesion of dust due to the contamination. Furthermore, since the refractive index matching agent used in this method generally has the property of flowing easily, it flows out of the connection portion, and it is difficult to obtain optical stability.
- the optical fiber is made detachable using a liquid or grease-like refractive index matching agent, it takes a lot of time because it is necessary to wipe off the refractive index matching agent and apply a predetermined amount again each time the optical fiber is attached or detached. And the work efficiency is poor.
- the liquid or grease-like refractive index matching agent and the solid refractive index matching member which are conventionally used do not maintain the fixed state at the time of connecting the optical fiber, so that the mechanical or thermal Due to physical factors, it was difficult to maintain a stable connection immediately after being affected by expansion and settlement. Specifically, the spacing between optical fibers changes minutely due to mechanical vibration and expansion and contraction. Therefore, when a liquid or grease-like refractive index matching agent is used, the refractive index matching agent also causes the gap force to flow out. Sometimes happened.
- the refractive index matching member and the end face of the optical fiber are easily separated from each other, so that air may enter the gap between the fibers and air bubbles may intervene, thereby deteriorating the optical characteristics. was there.
- Patent Document 4 a method has been proposed in which a dielectric film coated with an adhesive material is attached to one surface of a connection portion of an optical fiber.
- Patent Document 4 since one surface of the dielectric film has adhesiveness, it is possible to increase the adhesion and holding power to one side of the optical fiber, but the adhesion of the other surface is insufficient, as described above. The optical fiber may be damaged.
- the pressure-sensitive adhesive layer is a thin film, the strength of the surface of the pressure-sensitive adhesive layer is weak, and the end faces of the butted optical fibers and the burrs thereof are easily damaged by the burrs.
- Patent Document 1 Japanese Patent No. 2676705
- Patent Document 2 JP 2001-324641 A
- Patent Document 3 Japanese Patent Application Laid-Open No. 05-34532
- Patent Document 4 JP-A-55-153912
- Patent Document 5 Japanese Patent Application Laid-Open No. 05-157935.
- the present inventors have made it very easy to perform optical connection between optical transmission media such as optical fibers or between optical transmission media and optical components by using a solid adhesive connection member.
- the inventors have found that the present invention can be performed, and have completed the present invention.
- the optical connection structure of the present invention provides a solid adhesive connection having refractive index matching between end faces of an optical transmission medium facing each other or between an end face of an optical transmission medium and an optical component. It is characterized in that the members are closely interposed in a single layer state.
- solid adhesive connecting member means an adhesive connecting member that maintains a predetermined shape at room temperature without flowing in a static state.
- the thickness of the adhesive connection member at the connection portion after connection that is, between the end faces of the optical transmission medium facing each other, or between the end face of the optical transmission medium and the optical component.
- the thickness of the intervening adhesive connecting member is preferably 50 m or less.
- the adhesive holding distance of the adhesive connecting member is preferably 10 m or more.
- the adhesive connecting member is preferably made of silicone resin or acrylic resin.
- peripheral portion of the adhesive connection member may be supported by a support member.
- the optical connection structure has a refractive index between an optical transmission medium having a core facing each other or between an optical transmission medium having a core and an optical component.
- An adhesive connecting member consisting of a single layer with consistency is sandwiched between them.
- the minimum value of the distance from the center of the core of the optical transmission medium to the peripheral edge of the adhesive connecting member is D, and the maximum value is D.
- R is the radius of the optical transmission medium and ⁇ ⁇ is the radius of the core of the optical transmission medium.
- the optical connection structure has at least one optical fiber alignment hole, and a pair of optical fibers fixed in the optical fiber alignment hole.
- These ferrules or a pair of plugs including the ferrules are optically connected to each other by sandwiching a solid adhesive connecting member having a refractive index matching property and optically connected to each other. It is characterized by using a sheet-like adhesive composed of a single layer.
- a member for aligning the ferrules or the plugs may be provided.
- the member for positioning may be a split sleeve, and ferrules or plugs may be butted with the adhesive connecting member therebetween in the split sleeve.
- a member for positioning is a guide pin
- the ferrule or the plug has a guide pin hole
- a guide pin is provided in the opposite guide pin hole.
- the ferrule or plug may have been aligned by insertion.
- the ferrule or the plug is attached to an adapter, and the solid adhesive connecting member is held inside the adapter.
- the plugs may be optically connected by abutting the adhesive connection member inside the adapter.
- the adhesive connecting member may be held alone by the adapter, or one may be held by the adapter with the adhesive connecting member supported by the support member! / ,.
- the adhesive connection member may be supported by a support member, and the support member supporting the adhesive connection member may be provided in a split sleeve. It may be attached.
- the support member supporting the adhesive connection member is formed of a tubular member, the adhesive connection member is supported at one end of the tubular member, and the other end of the tubular member is fitted to the ferrule or the adapter. May be used.
- the optical connection structure has at least a pair of optical transmission media, an alignment member having an alignment groove, and refractive index matching.
- a solid adhesive connection member that is freely deformed, and a support member that supports the adhesive connection member, wherein at least one pair of end faces of the optical transmission medium face the alignment groove of the alignment member.
- a support member is placed above the alignment grooves between the optical transmission media, and at least a pair of optical transmission media are optically connected with the adhesive connecting member interposed therebetween.
- the alignment member may be provided with a groove for mounting a support member in a direction intersecting the alignment groove.
- the support member may have at least one protrusion
- the alignment member may have at least one hole. In this case, the projection of the support member is inserted and fixed in the hole of the alignment member, and the support member can be placed on the alignment groove.
- a first aspect of the optical connection method of the present invention is that the end faces of the optical transmission medium or the optical transmission medium are formed by using an optical transmission medium and a sheet-like adhesive connection member having refractive index matching with the optical component.
- the sheet-shaped adhesive connection member is attached to the optical transmission medium while the end face of the optical transmission medium is pressed against and adhered to the sheet-shaped adhesive connection member. Moving the optical transmission medium relatively in the axial direction to separate a part of the sheet-shaped adhesive connecting member while it is attached to the end face, and optical transmission with solid adhesive connecting material attached to the end face. A step of joining the medium to another optical transmission medium or optical component.
- the sheet-shaped viscous connection member may be supported by the end surface treatment member.
- the end face processing member may have a through hole for inserting an optical transmission medium, and a sheet-like adhesive connection member may be attached to one end of the end face processing member so as to cover the through hole.
- an optical transmission medium is used to cut and remove an end portion and cut the light.
- a fiber is used as an example.
- the optical fiber is moved relative to the sheet-shaped adhesive connection member until the end of the optical fiber comes into close contact with the sheet-shaped adhesive connection member.
- a part of the sheet-like adhesive connecting member is cut off while being attached to the end face of the optical fiber, and the adhesive connecting member is attached to the end face of the optical fiber.
- the end face of the optical fiber is processed.
- the adhesive connecting member can be easily attached to the end of the optical fiber only by moving the optical fiber, and it is not necessary to use a complicated device or expensive equipment. Subsequently, the optical fiber that has been subjected to the end face treatment is abutted against another optical fiber or other optical component and optically joined to produce an optical connection structure of the present invention.
- moving the sheet-shaped adhesive connection member relative to the optical transmission medium in the axial direction of the optical transmission medium means any of the adhesive connection member and the optical fiber. Means that you may move. The moving speed and moving distance may be appropriately selected and used.
- At least one pair of optical transmission media, an alignment member having an alignment groove, a freely deformable solid adhesive connection member having refractive index matching An optical connection method for forming an optical connection structure by using a supporting member for supporting the optical transmission medium, the method comprising: placing at least end faces of a pair of optical transmission media in an alignment groove of the alignment member so as to face each other; Placing a support member supporting a solid adhesive connecting member that is freely deformed on the alignment groove between the optical transmission media to be connected, and butting the opposing optical transmission medium with the adhesive connecting member interposed therebetween.
- optical transmission medium used in the present invention besides the above-mentioned optical fiber, an optical waveguide or the like can be used.
- the type of the power is not particularly limited, and any type of optical transmission medium may be used.
- the optical fiber is not limited at all, and may be appropriately selected according to its use. For example, an optical fiber having a material strength such as quartz or plastic can be used, and a holey fiber can also be used.
- As the optical waveguide a polyimide optical waveguide, a PMMA optical waveguide, an epoxy optical waveguide, or the like is used. Furthermore, the types of the two optical transmission media used are different.
- the present invention can be applied to optical transmission media having different outer diameters as long as the core diameter is the same.
- the number of optical fibers and the number of optical waveguides are not limited at all, and the use of an optical fiber tape consisting of a plurality of optical fibers is preferred.
- examples of the optical component that is optically connected to the optical transmission medium include an optical lens and a filter, and the type thereof is not particularly limited.
- examples of the optical lens include those having various shapes such as biconvex, biconcave, concave / convex, planoconvex, and aspherical surfaces, collimating lenses, rod lenses, and the like.
- Finters include, for example, filters for general optical communication, Examples include a multilayer filter and a polyimide filter.
- the solid adhesive connection member used in the present invention may be a member that comes into close contact with the end of the optical transmission medium with an appropriate tack when it comes into contact with the optical transmission medium or the optical component.
- an adhesive material that has desorption properties from the optical transmission medium, does not cause cohesive failure, and does not adhere to the removed optical transmission medium is used.
- polymer materials such as acrylinole, epoxy, vinylinole, silicone, rubber, urethane, methacrylate, nylon, bisphenol, diol, polyimide, and fluorinated epoxy
- a variety of adhesive materials such as a fluorinated acrylic material can be used.
- silicone-based and acrylic-based pressure-sensitive adhesives are particularly preferably used from the viewpoints of environmental resistance, adhesion, and other aspects.
- a porous structure may be formed depending on the material.
- the silicone-based pressure-sensitive adhesive used in the present invention means a pressure-sensitive adhesive in which the skeleton of the main chain has a Si-O-Si bond (siloxane bond), and is made of silicone rubber or silicone resin. They are applied and solidified or formed into a film in a dissolved state of an organic solvent.
- the main polymer of silicone rubber is a straight-chain polydimethylsiloxane, including those in which a part of a methyl group is substituted with a phenol group or a vinyl group. Silicone resin with a complex three-dimensional structure and a molecular weight of about 3,000 to 10,000 is used, and serves as an adhesion-imparting resin in rubber-based adhesives. It should be noted that the silicone-based pressure-sensitive adhesive has a crosslinking agent, a softener, Adjusting agents and other additives may be added to adjust the adhesive strength and wettability, or to impart water resistance and heat resistance.
- the silicone-based pressure-sensitive adhesive material has a feature that it has excellent heat-resistant holding power and excellent adhesive strength even in high-temperature and low-temperature environments. Therefore, in an optical connection structure in which a silicone-based adhesive is interposed between two optical transmission media or between an optical transmission medium and an optical component, the optical connection structure may be used in a high temperature environment (250 ° C) or a low temperature environment (150 ° C). (° C), the contact of the connection portion is maintained, and a stable connection state can be always maintained. In addition, even after a high temperature history, it does not harden or yellow, and can be peeled off better from the adherend.
- Silicone-based adhesives have excellent electrical insulation, chemical resistance, weather resistance, and water resistance, and are suitable for a wide range of materials, for example, plastic optical fibers made of fluororesin and cladding layers made of fluororesin. It can also be brought into close contact with an optical fiber coated with grease. Further, optical waveguides and optical components can be effectively used because they exhibit adhesiveness to fluororesin-based materials such as fluoropolyimide.
- the acrylic pressure-sensitive adhesive used in the present invention is a polymer whose basic structure is composed of a main monomer composed of an alkyl ester of acrylic acid having 2 to 12 carbon atoms or an alkyl ester of methacrylic acid having 4 to 12 carbon atoms.
- alkyl esters of acrylic acid such as ethyl acrylate, n-butyl acrylate, isobutyl acrylate, 2-ethylhexyl acrylate, lauryl acrylate, benzyl acrylate, and n-butyl.
- alkyl esters of methacrylic acid such as rumetharylate, isobutyl methacrylate, 2-ethylhexyl methacrylate, lauryl methacrylate, and benzyl methacrylate.
- monomers copolymerized with these main monomers include methyl acrylate, methyl methacrylate, ethyl methacrylate, propyl methacrylate, butyl acetate, acetic acid nitrile, methacrylic acid-tolyl, acrylamide, Styrene and the like.
- the acrylic adhesive in order to give a cohesive force necessary for bringing the optical adhesive into close contact with the optical transmission medium, the acrylic adhesive can have a crosslinked structure.
- a small amount of a monomer having a functional group such as acrylic acid, hydroxyshethyl methacrylate, or glycidyl methacrylate may be copolymerized.
- monomers having a functional group and Monocarboxylic acids such as acrylic acid and methacrylic acid
- polycarboxylic acids such as maleic acid, fumaric acid, citraconic acid, glutaconic acid, and itaconic acid
- carboxyl group-containing monomers such as acid anhydrides thereof
- Hydroxyl group-containing monomers such as 2-hydroxypropyl (meth) acrylate, 3-chloro- mouth, 2-hydroxypropyl (meth) acrylate, diethylene glycol mono (meth) acrylate, N-methylol acrylamide, and N-methylol methacrylamide
- amino group-containing monomers such as dimethylaminoethyl methacrylate, t-butylaminoethyl methacrylate, and attarylamide.
- Acrylic pressure-sensitive adhesives include emulsion-type pressure-sensitive adhesives that use water as a solvent during production and solvent-type pressure-sensitive adhesives that use organic solvents.
- solvent-type pressure-sensitive adhesives it is preferable to use solvent-type pressure-sensitive adhesives. This is because the solvent-based adhesive has excellent water resistance and forms a transparent adhesive film.
- Solvent-based pressure-sensitive adhesives are used in the form of monomers in organic solvents such as aromatic hydrocarbons such as toluene and xylene, esters such as ethyl acetate and butyl acetate, and ketones such as methyl ethyl ketone, methyl isobutyl ketone and cyclohexane. By radical polymerization or emulsion polymerization of an aqueous emulsion of monomers in the presence of an emulsifier.
- the acrylic adhesive Since it is important for optical connection parts that light passes through the connection part, the acrylic adhesive must be a material having excellent transparency, and the wavelength used, that is, visible light and visible light And the light transmittance in the near infrared region is preferably 85% or more.
- Acrylic adhesives are materials that can be relatively easily made transparent by adjusting the crosslinking agent and the curing agent. More preferably, the light transmittance at the wavelength used is 90% or more.
- the acrylic pressure-sensitive adhesive adheres well to glass, plastic, and the like, and also has excellent water resistance and chemical resistance.
- an optical connection structure in which this is interposed between two optical transmission media or between an optical transmission medium and an optical component, it is possible to keep the connection portion in close contact and to always maintain a stable connection state.
- it since it has excellent adhesive strength in the temperature range of 0 ° C to 80 ° C, it can be used without problems under normal ambient temperature environment.
- it has excellent weather resistance, and since it is difficult for rubber-based adhesives to easily undergo UV degradation, it does not harden or yellow during use. can do. More Another advantage is that it is inexpensive.
- the solid adhesive connecting member used in the present invention may be a sheet-like adhesive connecting member in which the above-mentioned adhesive material is formed into a film. Although it retains a predetermined shape, it may be freely deformed.
- the solid adhesive connecting member when the solid adhesive connecting member is a sheet-shaped adhesive connecting member, its shape is not particularly limited, and may be appropriately selected according to the environment and specifications around the connecting portion. For example, it may have a shape such as a circular shape, an elliptical shape, a square shape, and a triangular shape. The size of the sheet-like adhesive connecting member will be described later.
- the solid adhesive connecting member used in the present invention needs to have refractive index matching between optical transmission media and between the optical transmission medium and the optical component.
- the refractive index matching in this case refers to the degree of approximation between the refractive index of the adhesive connecting member and the refractive indexes of the optical transmission medium and the optical component.
- the refractive index of the adhesive connecting member used in the present invention is not particularly limited as long as it is close to the refractive indexes of the optical transmission medium and the optical component.However, from the viewpoint of transmission loss due to avoidance of Fresnel reflection, these are not considered. Are preferably within ⁇ 0.1, and those having a difference within ⁇ 0.05 are particularly preferably used.
- the average value of the refractive index of the optical transmission medium and the refractive index of the optical component and the refractive index of the adhesive connecting member fall within the above ranges.
- the thickness of the adhesive connection member interposed between the end faces of the optical transmission medium or between the end face of the optical transmission medium and the optical component depends on the pressing force at the time of abutting. It is preferably 50 ⁇ m or less, more preferably 20 ⁇ m or less. If the butted thickness is larger than 50 m, the distance between the butted optical transmission media is too large and the light loss increases, which may not be suitable as a connection structure for optical transmission. This is the same between the optical transmission medium and the optical component.
- the replacement of the adhesive connecting member may be appropriately performed, for example, when dust is present on the surface of the adhesive connecting member, or when dust is attached.
- a protective film may be attached to one or both sides of the adhesive connecting member in order to prevent foreign matter from entering before replacement. After the tip of the optical transmission medium is pressed or rubbed several times against the adhesive connecting member, dust and dirt adhering to the end of the optical transmitting medium are attached to the adhesive, and then the adhesive connecting member is removed. If exchanged, light transmission It can also be used as a means for cleaning the medium.
- the solid adhesive connection member since the solid adhesive connection member has a single layer structure, the structure is simple and no light reflection occurs. Adhesion of the refractive index matching agent into the hole of the holey fiber and the adverse effect on the optical fiber transmission characteristics, as seen with the liquid refractive index matching agent, are completely recognized by the adhesive connecting member. I can't.
- the adhesive connecting member since the adhesive connecting member is solid, it is difficult for contamination and dust to adhere by flowing around the connecting portion, thereby improving handling. Furthermore, since it can be brought into close contact only with the end face of the optical transmission medium, there is no contamination of the surroundings without contaminating the surroundings.
- the solid adhesive connecting member used in the present invention is attached to the end face of the optical transmission medium by contact, a simple support that does not require any special support means or a new structure for holding the adhesive connecting member is required. It can be supported by a member, and space can be saved.
- the solid adhesive connecting member is freely deformed inside, it is difficult for air to enter between the ends of the optical transmission medium, and connection can be made with low loss without requiring a polishing step. Optical connection can be repeated multiple times due to the restoring force of the member
- the distance between the end faces of the optical fibers can be made uniform and narrow, so that light loss can be reduced.
- the optical transmission medium can be deformed into a plane force wave shape while extending in the axial direction of the optical transmission medium, an excessive pressing force is not easily applied to the optical transmission medium, and the optical transmission medium is not damaged.
- even if a multi-core optical fiber tape is connected it can be easily connected. That is, since the adhesive connecting member is deformed in response to the abutment with respect to each of the plurality of optical fibers, the optical fibers are not damaged even when the protrusion amounts of the optical fibers vary. A stable optical connection can be made.
- the adhesive connection member when connecting a lens or a filter to an optical fiber, the adhesive connection member can be easily peeled off because it can be brought into close contact with a minimum area, and workability is improved. Further, when the adhesive connecting member is supported by the supporting member, the adhesive connecting member can be easily replaced by moving the supporting member when attaching and detaching the adhesive connecting member, thereby improving workability. It can be significantly improved. According to the optical connection method of the present invention, the adhesive connection member can be easily brought into close contact with the end face of the optical fiber only by relative movement of the optical fiber, and complicated devices and expensive equipment are used. In addition, there is no need to strictly set environmental conditions at the time of manufacturing.
- FIG. 1 is a plan view showing a basic example of the optical connection structure of the present invention.
- FIG. 2 is a plan view showing an example of the optical connection structure of the present invention.
- FIG. 3 is a plan view showing another example of the optical connection structure of the present invention.
- FIG. 4 is a plan view of a portion where the optical fiber and the sheet-shaped adhesive connecting member are adhered to each other in a direction perpendicular to the axis of the optical fiber in the optical connection structure of the present invention.
- FIGS. 5 (a) and 1 (e) are plan views showing the axial force of the optical fiber, showing a state in which sheet-shaped adhesive connecting members of various shapes are adhered to the end face of the optical fiber.
- FIG. 5 (f) is a plan view in the case where an adhesive connecting member is provided only on the end face of the optical fiber.
- FIG. 6 is a perspective view or a plan view showing a state in which the peripheral edge of the adhesive connection member used in the optical connection structure of the present invention is supported by various support members.
- FIG. 7 is a side sectional view showing an example of the optical connection structure of the present invention using a connection alignment member.
- FIG. 8 is a plan view showing an example of an optical connection structure of the present invention in which an optical fiber and an optical component are connected.
- FIG. 9 is a plan view showing another basic example of the optical connection structure of the present invention produced using a sheet-shaped adhesive connection member.
- FIG. 10 is a process chart of an example of a method for treating an end face of an optical transmission medium of the present invention for forming the optical connection structure of FIG. 9.
- FIG. 11 is a process chart of another example of the method for processing the end face of the optical transmission medium of the present invention for forming the optical connection structure of FIG. 9.
- FIG. 12 is a process diagram illustrating a preferred example of producing the optical connection structure of the present invention.
- FIG. 13 is a process chart of an example of a method for treating an end face of an optical transmission medium for producing an optical connection structure of the present invention.
- FIG. 14 is a process chart of an example of a method for treating an end face of an optical transmission medium for producing an optical connection structure of the present invention.
- FIG. 15 is a process diagram of an example of a method for processing an end face of an optical transmission medium for producing an optical connection structure of the present invention.
- FIG. 16 is a sectional view taken along line AA of FIG.
- FIG. 17 is a process drawing of an example of an optical connection method for forming an optical connection structure of the present invention.
- FIG. 18 is a side view of an MPO connector plug provided with an MT ferrule to which an optical fiber is connected.
- FIG. 19 is a perspective view of an example of an adapter for an MPO-type optical connector.
- FIG. 20 is a perspective view of another example of an adapter for an MPO-type optical connector.
- FIG. 21 is a schematic sectional view of an adapter applied to an FC type optical connector.
- FIG. 22 (a) is a plan view of a support member on which a sheet-like adhesive connection member is supported, and FIG.
- FIG. 2 (b) is a perspective view illustrating a state in which the support member of FIG. 22 (a) is mounted in the split sleeve.
- FIG. 23 is a cross-sectional view illustrating a case where failures are butted using the split sleeve of FIG. 22 (b).
- FIG. 24 is a process drawing of an example of forming the optical connection structure of the present invention.
- FIG. 25 is a diagram showing another example of the alignment member, which is a component constituting the optical connection structure of the present invention.
- FIG. 26 is a front view of a supporting member for supporting a freely deformable adhesive connecting member.
- FIG. 27 is a perspective view of components constituting the optical connection structure of the present invention.
- FIG. 28 is a cross-sectional view illustrating a state in which a freely deformable adhesive connection member is supported by a support member.
- FIG. 29 is a process drawing of one example of forming the optical connection structure of the present invention.
- FIG. 30 is an explanatory diagram for explaining a method of measuring an adhesive holding distance.
- FIG. 31 is a perspective view of FIG. 30 (a).
- FIG. 32 is an enlarged view of a part of FIG. 30.
- FIG. 33 is a process chart for forming the optical connection structure of Example 1.
- FIG. 34 is a plan view showing an optical connection structure of Example 3.
- FIG. 35 is a process chart for forming the optical connection structure of Example 4.
- FIG. 36 is a process diagram illustrating an end face processing according to the fifth embodiment.
- FIG. 37 is a view for explaining a connection alignment member used in Example 5, (a) is a side view, and (b) is a cross-sectional view taken along line BB.
- FIG. 38 is a process chart for forming the optical connection structure of Example 7.
- FIG. 39 is a process chart for forming an optical connection structure of Example 8.
- FIG. 40 is a diagram showing components of an optical connector
- FIG. 40 (b) is a diagram showing a connected state.
- FIG. 41 is a process chart for forming the optical connection structure of Example 9.
- FIG. 42 is a perspective view showing components of an optical connection structure according to Example 10.
- FIG. 43 is a diagram illustrating an optical connection structure of Example 10.
- FIG. 44 is a view showing a step of forming an optical connection structure of Example 11.
- FIG. 45 is a front view of a guide pin support member used for the optical connection structure in FIG. 44.
- FIG. 46 is a process chart for forming the optical connection structure of Example 12.
- FIG. 47 is a process chart for forming the optical connection structures of Examples 14 and 15.
- FIG. 48 is a process chart for forming the optical connection structure of Example 16.
- 10 (a, b): Optical fiber, 11 ⁇ 17 ⁇ Rod lens, 19...
- Optical lens 20 ⁇ Adhesive connecting member, 21 ⁇ Sheet adhesive connecting member, 25 ⁇ Adhesive connecting member, 31, 32, 34 ⁇ Supporting member, 40, 41, 42, 43, 44, 45, 46: Aligning member (aligning member for connection), 47 (a, b): Guide pin, 49 ⁇ Split sleeve, 50 ⁇ Adapter, 51 ⁇ ⁇ Adapter, 61, 62 ⁇ End treatment material, 71 (a, b) —MPO connector plug, 72 ⁇ ”FC connector plug, 75 (a, b) to MT ferrule, 76 ⁇ ” FC connector ferrule , 80 ... substrate (glass substrate).
- FIG. 1 is a plan view showing a basic example of the optical connection structure of the present invention using a sheet-shaped adhesive connection member, and uses an optical fiber as an optical transmission medium.
- a sheet-like adhesive connecting member 21 is interposed between the connecting end faces of the optical fibers 10a and 10b in a state where the sheet-like adhesive connecting member 21 is adhered.
- the two optical fibers 10a and 10b are abutted via a sheet-like adhesive connecting member 21, thereby forming a connection structure in which the optical fibers are optically connected.
- the two optical fibers 10a and 10b have a portion that is several tens of millimeters from the tip removed, and the tip is cut.
- the thickness t of the sheet-like adhesive connecting member before the optical components are optically connected to each other or between the end faces of the optical transmission medium is preferably in the range of 1 m ⁇ t ⁇ 150 m. If the thickness of the adhesive connecting member is less than 1 ⁇ m, handling becomes extremely difficult, and the flexibility cannot be maintained, so that the optical transmission medium or optical component is damaged by abutting the optical transmission medium. The likelihood increases. On the other hand, if the distance is 150 m or more, the distance between the end faces of the optical transmission medium or between the optical transmission medium and the optical component is too large even when the adhesive connecting member is deformed by abutting the optical transmission medium. As a result, the light loss increases. More preferably 2.5 ⁇ ⁇ 100 ⁇ ⁇ , even more preferably 5 / ⁇ ⁇ 1 ⁇ ; ⁇ 50; ⁇ ⁇ 1, especially! ! ! ⁇ ! ; ⁇ ! ! ! Duru.
- the sheet-like adhesive connecting member used in the present invention is composed of a single layer.
- the term “single layer” as used in the present invention means that there is no interface between different materials, such as a two-layer or three-layer structure, in the sheet-like adhesive connecting member. This does not preclude evenly mixed systems.
- the sheet-shaped adhesive connecting member used in the present invention has an extremely simple structure of a single layer having adhesiveness as described above. By using this single-layered sheet-shaped adhesive connection member, connection can be made without light reflection, and low-loss connection can be performed. Also, even if there is a burr on the end face of the optical fiber, it does not affect the adhesive sheet member in any way.
- the surface has wettability
- the end faces of two abutted optical fibers can be easily attached. Can be adhered to the optical fiber, and the adhesive strength can maintain the adhesion to the optical fiber. At the same time, it has refractive index matching, so that good optical connection can be made.
- the sheet-like adhesive connecting member does not need to be pressed excessively when mating optical fibers due to the wettability and adhesive strength of the surface. There is no danger. Further, since the sheet-shaped adhesive connecting member has removability as a property of the adhesive, it can be used repeatedly even if it is attached and detached a plurality of times.
- FIG. 2 is a plan view showing another example of the optical connection structure of the present invention when a sheet-shaped adhesive connection member is used.
- the connection end face between the optical fibers 10a and 10b has flexibility. This shows a state where the sheet-like adhesive connection member 21 is deformed due to the sheet-like adhesive connection member 21 having the shape.
- the flexible sheet-shaped adhesive connecting member 21 has a certain thickness, the two optical fibers can be brought close to each other by internally deforming the two optical fibers. Therefore, the thickness of the sheet-like adhesive connecting member can be increased, and the handling becomes very simple.
- the sheet-like adhesive connecting member is deformed while being in close contact with the end face of the optical fiber. Air does not easily enter between, and low-loss optical connection can be realized without using high-precision polishing technology.
- the optical fiber can be stably connected even if the optical fiber vibrates or changes in thermal shape.
- the sheet-shaped adhesive connecting member has a flexible surface, the handleability at the time of optical connection is very good because the end faces of the optical fibers are not damaged when they are abutted.
- the sheet-like adhesive connection member can be restored to its original state due to its flexibility, the detachment of the optical fiber from the optical connection structure is repeated using the sheet-like adhesive connection member a plurality of times. It becomes possible.
- FIG. 3 is a plan view showing another example of the optical connection structure of the present invention when a flexible sheet-shaped adhesive connection member is used.
- the positions of both ends of the sheet-shaped viscous connection member 21 are fixed by other components (not shown).
- the formation of the optical connection structure is performed as follows.
- Optical fiber 10a, 1 Ob and the sheet-like adhesive connecting member 21 are set at a fixed interval, and one optical fiber 10a is moved until its end face is in close contact with the sheet-like adhesive connecting member.
- the adhesive connecting member is moved while being deformed until it comes into close contact with the other optical fiber 10b.
- an optical connection structure in which the optical fibers 10a and 10b are mechanically optically connected is formed.
- the sheet-like adhesive connection member 21 is deformed, and the position of the butted optical fiber end surface is different from the position of the end surface of the sheet-like adhesive connection member before butting.
- the adhesive connecting member 21 is deformed into a flat plate waveform.
- the sheet-shaped adhesive connecting member is deformed while extending in the axial direction of the optical fiber, an excessive pressing force is exerted on the optical fiber, thereby preventing damage to the optical fiber.
- one optical fiber is fixed and the other optical fiber is moved as described above, there is no need to align the optical fiber, which requires delicate precision, and a more reliable optical connection in practical use
- the structure can be formed.
- the shape of the sheet-shaped adhesive connection member is flexible, so the shape returns to the shape before deformation, and the same sheet-shaped adhesive connection member must be used again. Can be.
- the sheet-like adhesive connecting member can be deformed into a planar shape and a waveform while flexibly extending. Therefore, attachment and detachment of the optical fiber can be performed repeatedly.
- the deformation in this case is a force that means that the sheet-shaped adhesive connecting member itself is deformed while being stretched.
- the sheet-shaped adhesive connecting member itself may be deformed by being compressed so as to be recessed inside as shown in FIG.
- FIG. 4 is a plan view of the connection portion between the optical fiber 10 and the sheet-shaped adhesive connection member 21 in the optical connection structure of the present invention, as viewed also in a direction force perpendicular to the axis of the optical fiber.
- D is the minimum value of the distance from the center 11 of the end face 10c of the optical transmission medium (optical fiber 10) in contact with the sheet-shaped adhesive connection member 21 to the peripheral edge 22 of the sheet-shaped adhesive connection member.
- R is the radius of the optical transmission medium.
- FIGS. 5 (a) to 5 (e) are diagrams for explaining the value of D for the sheet-shaped viscous connection members 21 of various shapes, and are plan views as viewed from the axial direction of the optical fiber. Fig. 5 (f) is described later.
- FIG. 6 is a plan view illustrating a state in which an adhesive connection member is provided only on the end face of the optical fiber to be used.
- 5 (a)-(e) 10a is an end face of the optical transmission medium in which the optical transmission medium (optical fiber 10) is in contact with the sheet-shaped adhesive connecting member 21, 11 is the center of the end face, and 22 is a sheet-shaped. The periphery of the adhesive connection member 21 is shown.
- a multi-core optical transmission medium is used as shown in Fig.
- D means the shortest distance between the contact position of the end of the adjacent optical transmission medium and the center of the optical fiber.
- the value of D excludes the portion where the supporting member or the fixing member comes into contact.
- the figure shows the shortest distance between the periphery of the section and the center of the optical fiber.
- the sheet-like adhesive connecting member comes into close contact when the optical fibers are butted, but the sheet-like adhesive connecting member cannot be deformed in a wavy shape.
- D is smaller than R, the sheet-shaped adhesive connecting member does not adhere to the entire surface of the optical fiber, so that the sheet comes into contact with air and light loss increases.
- the range of D is more preferably 2R ⁇ D ⁇ 30R.
- the means for fixing the sheet-like adhesive connection member is not particularly limited, but in the case of the optical connection structure shown in Figs. 1 to 3, the sheet-like adhesive connection member is used. It is preferable that the device is always used in a fixed state. For example, it is preferable to use a support member as shown below.
- FIG. 6 is an oblique view showing a state in which the peripheral edge of the sheet-shaped adhesive connection member used in the optical connection structure of the present invention is supported by various support members.
- FIG. 6 is a perspective view (FIGS. 6 (a)-(d) and (g)) and a plan view (FIGS. 6 (e) and (f)).
- the supporting member 31 can hold the sheet-shaped adhesive connecting member 21 and can fix at least both ends.
- the shape of the supporting member 31 can be a simple shape holding both ends as shown in FIG. Although it may be a U-shape with three directions fixed as shown in Fig. 6 (b), it can be stably gripped in the vertical and horizontal directions as shown in Fig. 6 (c). Is more preferable. Further, as shown in FIG. 6 (e) and FIG. 6 (f), the holding member 311 may be provided so as to easily hold the support member.
- the support member is inserted into the split sleeve while holding the holding portion, and is installed near the center. Is also possible.
- the number of members constituting the support member is not limited.
- the sheet-like adhesive connection member is sandwiched between two support members 3 la and 3 lb as shown in Fig. 6 (g). It may have a built-in structure.
- the size of the support member is not particularly limited, and may be appropriately selected and used according to the use environment and specifications. Also, regarding the material of the support member, metals, plastic materials, rubber materials, and the like may be appropriately selected and used. By fixing the sheet-like adhesive connection member with the support member, the sheet-like adhesive connection member can be flexibly deformed.
- the sheet-like adhesive connection member when the sheet-like adhesive connection member is fixed by the frame-like support member, it can be handled without contacting the sheet-like adhesive connection member during the installation work, and thus the sheet-like adhesive connection member surface can be handled. It can prevent contamination and dust adhesion. Therefore, the sheet-shaped adhesive connection member can be easily replaced.
- FIG. 7 is a side sectional view showing an example of the optical connection structure of the present invention using a connection alignment member as a positioning member.
- the structure comprises two optical fibers 10 a and 10 b, a connecting arrangement member 40, and a sheet-like adhesive connecting member 21 supported by a support member 31.
- the connection alignment member 40 has a groove 401 at the center, and a pair of through holes 402a, 402b for inserting an optical fiber or an optical fiber core on both sides of the groove 401. I have.
- FIG. 1 In the optical connection structure shown in FIG.
- the sheet-like adhesive connection member 21 is inserted into the groove 401 so as to be perpendicular to the through-hole, and then into the through-holes 402a and 402b of the connection alignment member 40, Insert the optical fiber core wires 10a and 10b whose ends are It can be formed by pressing the end face against the sheet-shaped adhesive connecting member 21.
- the alignment of the optical fibers can be easily performed by using the connection alignment member.
- the sheet-shaped adhesive connecting member can be stored in the connecting aligning member, which facilitates handling and adhesion of dust. The prevention effect can be improved.
- the means and method for positioning the optical fiber by the connection alignment member are not particularly limited as long as the optical fiber end faces are positioned coaxially.
- An optical fiber may be inserted using a through hole as shown in FIG. 7, or an optical fiber may be placed on an alignment groove such as a V-groove.
- the size of the connecting alignment member is not particularly limited, and the shape thereof is not particularly limited as long as it is appropriately selected according to the type or number of optical fibers. For example, a shape such as a semi-cylindrical shape or a rectangular parallelepiped shape may be used.
- the structure and shape of the through-hole are not particularly limited.
- connection alignment member a material having a low coefficient of friction such as polyacetal resin, a material having good mechanical properties such as being hardly thermally deformed, a stainless steel, It is preferable to use a non-corrosive material such as trifluoroethylene resin and tetrafluoroethylene resin, or a material having low reactivity to chemical substances and solvents.
- connection alignment member may have a large number of member strengths.
- the connection alignment member may have a structure in which a member having a groove for inserting an adhesive connection member and a member having a through hole are combined.
- the alignment members can be accurately aligned with each other.
- the end of the through hole may be processed into a cone shape to facilitate mounting of the optical fiber.
- the groove for the adhesive connecting member provided in the connecting alignment member may be any shape as long as the sheet-like adhesive connecting member can be inserted and fixed, and its shape, position, and number are not particularly limited.
- FIG. 8 is a plan view showing an example of an optical connection structure of the present invention in which an optical fiber and an optical component are connected.
- FIG. In the case of this figure, in the optical connection structure, the sheet-shaped adhesive connecting member 21 and the optical fiber 10 and the optical lens 19 are installed at regular intervals, and the end face of the optical fiber 10 is in close contact with the sheet-shaped adhesive connecting member 21. Then, the optical fiber 10 can be formed by moving the optical fiber 10 until the sheet-shaped adhesive connecting member 21 is deformed and comes into close contact with the optical lens 19.
- optical connection can be easily performed according to the present invention even for a convex optical component whose thickness gradually or continuously decreases from the center to the outer periphery as shown in FIG. it can.
- the adhesive connection member may be configured so that at least only the core of the optical fiber is in close contact with the optical lens. Therefore, it is possible to easily peel off the adhesive lens from the optical lens, and it is also possible to prevent the optical lens from being contaminated.
- FIG. 9 is a plan view showing another basic example of the optical connection structure of the present invention produced using a sheet-shaped adhesive connection member. That is, the two optical fibers 10a and 10b are put together via the adhesive connecting member 20, thereby forming an optical connection structure in which the optical fibers are optically connected.
- the two optical fibers have several tens of millimeters covered and removed from the tip, and the tip has been cut.
- the sheet-like adhesive connecting member is provided only on the end face of the optical fiber by the end face treatment method shown in FIGS. 10 and 11 described later.
- FIG. 9 in the case of the optical connection structure in which the adhesive connection member is provided only on the end face, it is preferable that D ⁇ r and D ⁇ 1.5R are satisfied.
- Fig. 5 (f) is a diagram explaining this case.
- D is the distance from the center 11 of the core of the optical fiber 10 composed of the core 13 and the clad 12 to the periphery of the adhesive connecting member 20, R is the radius of the optical fiber, and r is the radius of the core.
- the minimum value D of the distance D from the center 11 of the core of the optical fiber 10 to the periphery of the adhesive connecting member 20 is not less than the radius r of the core, and the maximum value D is ,
- the area occupied by the adhesive connecting member should be such that it can cover the entire area of the core 13 at the minimum and does not protrude more than 1.5 times from the end face of the optical fiber at the maximum. Accordingly, since the adhesive connecting member is present only at or near the end face of the optical transmission medium, contamination can be prevented, dust is less likely to occur, and handleability is improved. In addition, a very simple connection structure that does not require any special means or structure for holding the adhesive connection member is newly provided, and space can be saved.
- D is smaller than the radius r of the core of the optical fiber, there is a portion where the adhesive connecting member does not contact in the core portion where light is transmitted, and light loss occurs in that portion. Also D
- the adhesive connecting member is provided only at the end of the butted optical fiber, the adhesive connecting member has almost the same size as the diameter of the optical fiber, and the occupied area of the adhesive connecting member is extremely small. It is possible to design a very simple structure. In addition, since it does not come into contact with the surrounding trash, it does not pollute and does not flow out, so it does not pollute the surroundings.
- FIG. 10 and FIG. 11 are process diagrams of an example of the method for processing the end face of the optical transmission medium of the present invention for forming the optical connection structure of FIG. 9, in which the sheet-like adhesive connection member is attached only to the end face. It shows a basic example of wearing.
- an optical fiber is used as an optical transmission medium.
- a sheet-shaped adhesive connecting member 21 is provided on the side of the cut optical fiber 10 whose end is removed. The positions of both ends of the sheet-shaped adhesive connection member are fixed by other appropriate members (not shown).
- the optical fiber is moved relative to the sheet-like adhesive connecting member until the end face of the optical fiber 10 contacts the sheet-like adhesive connecting member 21.
- move the optical fiber further in the axial direction.
- a part of the sheet-like adhesive connecting member is cut off while being attached to the end face of the optical fiber, and the adhesive connecting member 20 can be provided on the end face of the optical fiber.
- the optical fiber is moved relative to the sheet-shaped adhesive connection member until the end of the optical fiber 10 contacts the sheet-shaped adhesive connection member 21. Then, by moving the optical fiber in the opposite direction, the adhesiveness of the adhesive connecting member is utilized, and a part of the sheet-like adhesive connecting member is cut off while being adhered to the end face of the optical fiber.
- An adhesive connecting member 20 can be provided on the end face. According to this method, since the moving range of the optical fiber can be made smaller than that of the method shown in FIG. 10, there is an advantage that the manufacturing space can be further reduced.
- FIG. 12 is a process diagram illustrating a preferred example of producing the optical connection structure of the present invention, and shows a case where the optical connection structure is formed using the connection alignment member. That is, as shown in FIGS. 10 and 11, the tip is covered and removed, the optical fiber 10a having the adhesive connection member 20 adhered to the end face is cut, and the connection alignment member having a through hole is used. 41 Insert into the through hole 411 (FIG. 12 (a)). Next, the optical connection is performed by inserting the cut optical fiber 10b with the tip removed from the through hole on the opposite side, and pressing the end face of the optical fiber against the adhesive connecting member (FIG. 12b). .
- the adhesive connecting member covers the end face of the optical fiber to the minimum necessary for connection, and therefore can be used even in an alignment member having a narrow through-hole.
- the optical fiber can be freely moved in the axial direction. Therefore, when mounting the optical component, the position of the optical fiber can be freely adjusted while maintaining the connection state.
- the adhesive connecting member can be accommodated in the connecting alignment member by using the connecting alignment member, the handleability and the effect of preventing adhesion of dust can be improved.
- FIG. 13 is a process diagram of another example of a method for processing an end face of an optical transmission medium for producing an optical connection structure of the present invention. This shows a case where the end face processing of the optical fiber is performed. That is, as shown in FIG. 13, the distal end is covered and removed, and the cut optical fiber ribbon 15 is moved in the axial direction of the optical fiber, and the end faces of the optical fibers 101 to 104 are supported by a support member (not shown). Supported sheet shape It is brought into contact with the adhesive connecting member 21 (FIG. 13 (a)).
- the connection member can be brought into close contact with each optical fiber in the same manner.
- the force indicating four optical fibers is not particularly limited.
- FIG. 14 is a process diagram of an example of a method for processing an end face of an optical transmission medium for producing the optical connection structure of the present invention, wherein an end face supporting a sheet-shaped adhesive connection member for end face treatment.
- the end face processing member 61 has one through hole 611, into which an optical fiber core or an optical fiber can be inserted.
- a sheet-like adhesive connection member 21 is attached to one surface of the end face processing member so as to cover the through hole.
- the tip of the optical fiber 10 with the coating removed is inserted into the through hole 611 (FIG. 14 (a)), and moved until the sheet-like adhesive connecting member and the end face of the optical fiber 10 come into contact (FIG.
- connection member 20 can be attached.
- Fig. 14 (c) In the case shown in this figure, by providing the end face processing member 61 that supports the sheet-shaped adhesive connection member 21, the sheet-shaped adhesive connection member can be separated according to the shape of the optical fiber. Therefore, processing can be performed with a good yield. Further, even if the end face of the optical fiber has a certain angle, the adhesive connecting member can be securely attached.
- FIG. 15 is a process diagram of an example of a method for processing an end face of an optical transmission medium for producing an optical connection structure of the present invention, in which an end face processing member that supports a sheet-like adhesive connection member is used. It shows the case where it is done.
- FIG. 16 is a sectional view taken along line AA of FIG.
- the end face processing member 62 has a structure in which an upper flat plate 623 such as glass is placed on a lower substrate 622 having a V-shaped alignment groove 621 for guiding an optical fiber. It can also be used as a positioning member. A through hole is formed by the alignment groove 621 and the upper flat plate 623.
- a sheet-like adhesive connecting member 2 1 is attached and fixed (Fig.
- the upper flat plate 623 can be placed on the lower substrate 622 (FIG. 15A). Then, the optical fiber 10 placed in the alignment groove is moved in the axial direction along the alignment groove so that the end face thereof is brought into contact with the sheet-like adhesive connecting member 21 (FIG. 15 (b)), and further moved. Then, the adhesive connecting member 20 can be attached to the end face (FIG. 15 (c)). By removing the upper flat plate 623 after penetrating the through hole, the optical fiber 10 provided with the adhesive connecting member can be easily taken out from above (FIG. 15 (d)).
- the optical fibers when forming the optical connection structure are connected to each other. Is not particularly limited as long as the optical fiber end faces are aligned coaxially.
- the size and shape of the end face processing member are not particularly limited, and are formed using the same material as the connection alignment member described in FIG.
- FIG. 17 is a process diagram of an example of an optical connection method for producing the optical connection structure of the present invention, and shows a case where a connection alignment member for supporting a sheet-shaped adhesive connection member is used.
- the connecting alignment member 40 has a deep groove 403 near the center for supporting the sheet-like adhesive connecting member, and a pair of coaxial through holes 402a, 402b on both sides of the deep groove. It has the function of aligning the optical fibers and the function of supporting the sheet-shaped adhesive connecting member at the same time (FIG. 17 (a)).
- the sheet-shaped adhesive connecting member 21 is inserted into the deep groove 403 so as to be perpendicular to the through-hole (FIG. 17 (b)).
- the coated and removed optical fiber 10a is inserted into the through hole 402a, the end face of the optical fiber is brought into contact with the sheet material in the through hole, the optical fiber is further moved, and inserted into the other through hole 402b. Let it. As a result, a part of the sheet-shaped adhesive connecting member is cut off, and the adhesive connecting member 20 is attached to the end of the optical fiber (FIG. 17 (c)). Next, another optical fiber 10b is inserted through the through hole on the other side and moved until it comes into close contact with the adhesive connecting member (FIG. 17 (d)). In the case shown in this figure, the position of the connection point of the optical fiber can be freely set, so that the handling and workability are significantly improved.
- the sheet-shaped adhesive connection member may be attached to an adapter. Further, it may be supported by the support member and mounted in the split sleeve. Figures 18 to 23 illustrate these cases.
- FIG. 18 is a diagram showing a state in which MPO connector plugs 71 a and 7 lb provided with MT ferrules for aligning and holding an optical fiber are connected via an adapter 50.
- the adapter for example, those shown in FIGS. 19 and 20 can be used.
- a sheet-shaped viscous connection member 21 that is gripped in a vertical direction by a suitable member is disposed near the center where the MT flutes abut in the adapter. That is, the sheet-like adhesive connecting member 21 is arranged on one of the two separated MPO adapters 511, and the other adhesive 512 is arranged inside by connecting the other one 512 with a screw or the like.
- An adapter is provided. In this way, if the connecting member made of a sheet-like adhesive is disposed in the adapter in advance, the connecting member is not contaminated with the surrounding environmental force or dust adheres thereto, and the connecting member is placed on the end face of the ferrule. It is preferable because it does not need to be used and the workability is improved.
- the MPO adapter 51 has a groove 513 whose upper part is open near the center where the MT ferrule meets. In this groove, a sheet-like adhesive connecting member gripped in the vertical direction as shown in FIG. 16 (c) is inserted.
- FIG. 21 is a side sectional view of an adapter that applies the present invention to an FC-type optical connector.
- a split sleeve 49 is attached to the adapter 52, and the sheet-shaped adhesive connecting member 21 is arranged near the center of the split sleeve.
- the adhesive connecting member a film-like material formed by pouring a curable adhesive material from a slit portion of a split sleeve and setting the same before attaching the split sleeve to the adapter is used.
- the connecting member can be securely placed on the ferrule end face, and workability is improved.
- the means for fixing the sheet-shaped adhesive connection member is not particularly limited, such as being fixed in the split sleeve by hardening as described above.
- a support member as described below, which is preferably used, may be used.
- FIG. 22 (a) is a view showing a state in which the sheet-like adhesive connecting member of the present invention is supported by a supporting member, and the supporting member 31 has a circular shape having the same cross-sectional shape as the ruler. In addition, the outer periphery of the sheet-shaped adhesive connection member 21 is gripped.
- FIG. 22 (b) is a perspective view illustrating a state where the sheet-like adhesive connection member supported by the support member shown in FIG. 22 (a) is mounted in the split sleeve.
- the sheet-like viscous connection member 21 supported by the support member 31 is placed vertically on the split sleeve 49, and is pushed into the split sleeve by a cylindrical pressing member 91 having the same diameter as the inner diameter of the split sleeve. And place it near the center.
- a cylindrical pressing member 91 having the same diameter as the inner diameter of the split sleeve. And place it near the center.
- FIG. 23 is a cross-sectional view illustrating a case where a fail is abutted using the split sleeve.
- a pair of ferrules 75a and 75b to which the optical fibers 10a and 10b are fixed are inserted into the split sleeve 49 to which the sheet-shaped adhesive connecting member 21 supported by the support member 31 is attached.
- the tips of these ferrules have a convex shape, and therefore, at the time of optical connection, a gap is formed between the abutting projections of the ferrule tips.
- the support member 31 is located in the gap between the formed ferrules so as not to obstruct the contact between the sheet-shaped adhesive connecting member 21 and the end face of the ferrule, thereby forming an optical connection structure. You.
- FIG. 24 is a process chart of an example of forming an optical connection structure using a freely deformable adhesive connection member.
- a pair of optical fibers 10a and 10b, an alignment member 42 having an inverted triangular V-shaped alignment groove 421, and a support member 34 are prepared.
- the supporting member 34 has a columnar shape, and a solid adhesive connecting member 25 having refractive index matching and freely deforming is attached to the lower outer peripheral portion (part of the outer periphery) by coating.
- Each of the optical fibers 10a and 10b has a cut end face from which the coating on the end is removed.
- FIG. 24A a pair of optical fibers 10a and 10b, an alignment member 42 having an inverted triangular V-shaped alignment groove 421, and a support member 34 are prepared.
- the supporting member 34 has a columnar shape, and a solid adhesive connecting member 25 having refractive index matching and freely deforming is attached to the lower outer peripheral portion (part of the outer periphery) by coating
- the pair of optical fibers 10a and 10b is placed in the V groove 421 of the alignment member 42 from above. In this case, the optical fibers are placed so that there is an appropriate space between them.
- the support member 34 is placed on the alignment member 42 so that the support member is located between the optical fiber 10a and the optical fiber 10b. Temporarily fix with wood. As a result, the adhesive connection member 25 applied to the lower outer peripheral portion of the support member 34 hangs inside the V-groove 421.
- FIG. 24 (d) the two optical fibers 10 a and 10 b are moved and butted below the support member 34.
- the optical fibers 10a and 10b are preferably fixed from above by plate-like pressing members 81a and 81b.
- the adhesive connecting member 25 is supported by the support member 34, the operator can handle the optical fibers 10a and 10b without directly contacting the adhesive connecting member 25. It becomes.
- the connecting member 25 can be attached only to the connection end faces of the optical fibers 10a and 10b, and the periphery of the connection portion can be attached. There is no influence of contamination or adhesion of dust.
- alignment can be performed on the V-groove 421, optical connection can be performed without causing a shift in the optical axis of the optical fibers 10a and 10b.
- the alignment member 42 may have a V-shaped groove 422 that is shallower than the depth of the alignment groove 421 in a direction intersecting with the alignment groove 421.
- the support member 34 on which the adhesive connecting member is supported can be placed on the V-groove 422, so that the position of the support member 34 can be easily fixed. it can.
- the material and shape of the support member for supporting the freely deformable adhesive connection member are not particularly limited.
- a support member 34 having a shape as shown in FIGS. 26A to 26F can be used. That is, a rod-shaped object (Fig. 26 (a)), an L-shaped or T-shaped object provided with one projection 341 (Fig. 26 (b), Fig. 26 (c)), two projections 341a, Various shapes such as the one with 341b (Fig. 26 (d) -Fig. 26 (f)) can be used. Wear.
- the cross-sectional shape may be a circle, an ellipse, or a polygon such as a triangle or a quadrangle.
- the material may be appropriately selected from metals, glasses, plastics, rubber materials and the like.
- the holding portions 342a and 342b are provided above as shown in FIG. 26 (f)
- the supporting member can be easily gripped, and the work efficiency when mounting the holding member is improved.
- the protrusion acts to stabilize the support member, which is preferably fitted into a hole provided in the alignment member. .
- FIG. 27 is a diagram illustrating a case where an optical connection structure is formed using the support member shown in FIG. 26 (e).
- the alignment member 42 is provided with a V-groove 421 and a pair of holes 423a and 423b on both sides thereof.
- the protrusions 341a and 341b 1S of the support member 34 holding the adhesive connecting member 25 are provided in the holes 423a and 423b. It is configured to be inserted.
- the support members 34 are placed on the alignment grooves 421 by inserting the protrusions 341a and 341b into the holes 423a and 423b, respectively, so that the positions of the support members 34 and the alignment members 42 can be easily adjusted.
- the alignment can be performed, and the position of the support member 34 can be stabilized at the time of optical connection.
- the position and method of providing the adhesive connecting member on the support member may be appropriately selected and used according to the properties of the adhesive connecting member to which the present invention is not limited.
- the adhesive connecting member may be attached to the entire outer peripheral portion of the support member 34, or may be provided in FIGS. ) May be attached in accordance with the position and size of the alignment groove, such as the one attached to the lower periphery of the support member 34 as shown in FIG.
- Examples of the method of providing the adhesive connecting member on the support member include a method of applying a liquid adhesive connecting member with a spray or a brush and solidifying it, and a method of forming the adhesive connecting member into a film and supporting it. It can be wound around the outer periphery of the member (Fig. 28 (d)) or attached to a part of the outer periphery (Fig. 28 (e)).
- the optical fibers 10a and 10b need not be connected directly below the support member 34.
- the end faces of the optical fibers may be connected at a position different from the position where the support member is placed.
- the optical fibers 10a and 10b are arranged in the alignment groove 421 of the alignment member 42 (FIG. 29 (a)), and the left optical fiber 10a is moved rightward, and the end face is provided on the support member 34. Contact the deformable adhesive connecting member 25, and further move the optical fiber 10a to the right.
- the optical fiber 10b on the left side as shown in FIG. 29 (b).
- the optical connection structure of the present invention in which the adhesive connection member 25 is interposed between the optical fibers 10a and 10b in a state of being in close contact with each other is formed.
- the optical fiber 10a can also be fixed by pressing down the support member 34 with the pressing member 81 downward.
- the size of the alignment member 42 is not particularly limited, and the shape of the alignment member 42 is not particularly limited if it is selected according to the type or number of optical fibers.
- the number of the alignment grooves 421 may be selected according to the number of optical fibers, and even if there are a plurality of optical fibers, the interval between the alignment grooves 421 may be appropriately selected according to specifications.
- the cross-sectional shape of the alignment groove 421 is not particularly limited, and may be an elliptical shape, a circular shape, a rectangular shape, or the like, in addition to a V-shape.
- the adhesive connecting member 25 when the adhesive connecting member 25 is deformed and connected, the protruding material spreads in the alignment groove space. Therefore, the distance between the optical fibers is reduced, and the optical loss is reduced. Further, since the adhesive connecting member is in close contact with the entire end face of the optical fiber, the optical connection of the optical fiber can be stabilized.
- the V-groove is the most suitable structure because the optical fiber can be easily placed and stabilized immediately.
- the material of the alignment member is not particularly limited, and the same materials as described with respect to the alignment member in FIG. 7 can be used.
- the adhesive holding distance of the adhesive connecting member is preferably 10 ⁇ m or more, but the adhesive holding distance of the adhesive connecting member is 23 ⁇ 1 ° C. and the humidity is 45 ° C. It is a value measured as follows under% conditions.
- FIG. 30 is an explanatory diagram for explaining a method of measuring the adhesive holding distance
- FIG. 31 is a perspective view of the MT ferrule with the adhesive connecting member attached thereto
- FIG. It is an enlarged view of the connection part of an optical fiber. As shown in Fig.
- an MT ferrule 75a (Hakusan Seisakusho, 8 cores, material PPS) is provided with a 50 m thick adhesive layer on the end face, and a 100 m thick plastic film 91 (9 la, 91b ) (Size 0.5mm x 7mm) is attached to the top and bottom of the through hole 75 la and 75 lb respectively, and the sheet-like adhesive connecting member 21 (size 2mm x 3mm x thickness) is connected to the center of the two films. 25 m) (Fig. 31).
- optical fiber 10b was inserted into the through hole of the other MT ferrule 75b, and the end face of the optical fiber 10b was moved until it came into contact with the adhesive connection member. This contact position is defined as the origin G. Furthermore, after moving the optical fiber 10b to a position where the distance between the origin G and the end face of the optical fiber 10b becomes 10 m (in the direction of the arrow), the optical fiber 10b is held for 2 seconds in that state (FIG. 30 (d Figure 32 (a)).
- the optical fiber 10b was gradually returned in the direction of the arrow at a speed of 10 mZsec (FIG. 30 (e)), and the optical fiber 10b was moved until the adhesive connecting member was peeled off the core. Then, the distance between the position where the adhesive connecting member was peeled off from the core and the origin G was measured, and this distance H was defined as the adhesive holding distance. (Fig. 32 (b))
- Additive type silicone adhesive coating solution that also has strong power (SD4590 is the main ingredient, BY24—741
- This additional silicone adhesive is coated on one side of a 100 ⁇ m-thick polyethylene terephthalate film coated with a release agent so that the film thickness after drying becomes 50 ⁇ m to form an additional silicone adhesive layer. A film was formed. In use, the film was peeled off from the polyethylene terephthalate film (sheet-shaped adhesive connecting member (2)).
- an optical connection structure was formed as shown in FIG.
- the V-groove cross sections of the two alignment members 43a and 43b (size 5 mm ⁇ 10 mm) having V-grooves were aligned with an optical microscope, and then a 0.05 mm slit 801 provided on the glass substrate 80 was used.
- the end of the V groove was aligned with the position of 2 mm, and the alignment member was fixed to the glass substrate 80 with an adhesive.
- the sheet-shaped viscous connection member 21 was inserted into a slit of the glass substrate and arranged vertically on the surface of the glass substrate.
- the optical fibers 10a and 10b were arranged in the V grooves of both the alignment members 43a and 43b.
- a quartz optical fiber core wire Fluorine-Field-Field-Field-Field-Field-Field-Field-Field-Field-Field-Field-Field-Field-Field-Field-Field-Field-Field-Field-Field-Field-Field-Field-Fieldс ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇
- connection loss of the connected optical fiber was measured at a wavelength of 1300 nm, it was less than 0.2 dB, and when the return loss was measured, it showed good optical characteristics of 50.3 dB.
- An optical connection structure was formed in the same manner as in Example 1 using the sheet-like adhesive connection member (2) obtained as described above.
- the splice loss of the connected optical fiber was measured and was 0.4 dB or less, indicating good optical characteristics. Further, a heat resistance test (conforming to JIS C 0021) in which the optical connection structure was left in an environment of 125 ⁇ 2 ° C., and a temperature cycle test of ⁇ 40 ° C. to 75 ° C. and 500 times were performed.
- the optical loss variation was 0.4 dB or less, and when the adhesive connection member was observed after detachment of the optical connection, no solidification or yellowing was observed, and it was found that the adhesive connection member could be sufficiently reused as an optical connection component.
- FIG. 34 is a plan view showing an optical connection structure in which four-core optical fiber ribbons are connected.
- two four-core optical fiber ribbons 15a (the optical fibers in this ribbon are 101-104) and 15b are fixed on the glass substrate 80.
- the connection operation was performed in the same manner as in Example 1 except that two alignment members 43a and 43b having four V-grooves were used.
- the fiber could be easily optically connected.
- the force sheet-shaped adhesive connecting member which had a variation of about 10 ⁇ m between the four optical fiber strands, was deformed flexibly and each optical fiber was deformed.
- FIG. 35 is a diagram showing a step of connecting an optical fiber and a rod lens.
- the optical fiber 10 was set in the V groove of the alignment member 43 on the glass substrate 80.
- the rod lens 17 (outside diameter 2 mm ⁇ , manufactured by mflends) is passed through the rod lens alignment member 44 (size 5 mm X 5 mm X 10 mm) having a through hole 441 of 2.lmm ⁇ , and the rod lens end face is used for the rod lens.
- the alignment member end face force is also positioned at an appropriate distance and fixed with an adhesive, so that the rod lens is aligned with the V-groove, and the alignment member 43 and the rod lens are positioned 0.05 mm from the slit 801 of the glass substrate 80.
- the alignment member 44 was fixed to the surface of the glass substrate with an adhesive.
- the sheet-shaped viscous connection member 21 was inserted and installed in the slit (FIG. 35 (a)).
- the optical fiber is moved so as to crawl in the V-groove, and the end face of the optical fiber is abutted against the sheet-like adhesive connecting member (FIG. 35 (b)), and further moved to remove the sheet-like adhesive connecting member.
- the optical fiber 10 was sandwiched between the flat plate 85 and the alignment member 43, and further, they were sandwiched and fixed by the optical fiber fixing jig 94 (FIG. 35 (c)).
- the lens and the sheet-shaped adhesive connecting member are deformed by pressing the optical fiber to deform the adhesive connecting member. Can be easily peeled off at the time of removal work because they adhere to each other with a minimum area
- the end face treatment of the optical fiber was performed as shown in FIG. That is, as the sheet-like adhesive connecting member 21 of the optical member, an acrylic adhesive material adjusted to a refractive index of 1.46 was formed into a sheet, and a sheet having a thickness of 25 ⁇ m and a size of 8 mm ⁇ 16 mm was used. This was attached to a U-shaped support member 31 of the same size as the sheet without wrinkles (FIG. 36 (a)). Next, the covering of one optical fiber 10 (made by Furukawa Electric, outer diameter 250 m, cladding diameter 125 m, core diameter 10 m) was removed by 20 mm from the end, the bare optical fiber was exposed, and the end was removed.
- one optical fiber 10 made by Furukawa Electric, outer diameter 250 m, cladding diameter 125 m, core diameter 10 m
- the optical fiber was cut at a distance of 10 mm from the center.
- the sheet material attached to the support member was placed in close contact with the end face of the optical fiber (FIG. 36 (b)).
- the optical fiber 10 was moved until the sheet-like adhesive connecting member that was in contact with and adhered to the optical fiber end face was cut off from the non-contact portion (FIG. 36 (c)).
- the optical fiber having the adhesive connecting member 20 adhered to the end face was moved upward, and the optical fiber was removed from the supporting member 31 supporting the sheet (FIG. 36 (d)).
- the peripheral portion of the adhesive connecting member on the surface in contact with the optical fiber was about 50 ⁇ m to 65 ⁇ m in the core, the force, and the like.
- the optical fiber 10a provided with the adhesive connecting member 20 was optically connected using an alignment member 45 as shown in FIG. That is, the tip is covered and removed in a V-shaped alignment groove of a lower substrate 452 (10 mm X 40 mm X 10 mm) having a V-shaped alignment groove 451 having a width of 250 / ⁇ and a height of 250 / zm at the center. Then, the cut optical fiber 10a was placed, while the similar optical fiber 10b was placed so as to face the same. The two optical fibers 10a and 10b were closely brought into contact with the adhesive connecting member 20 along the V-shaped alignment groove until they came into contact. In this state, an upper glass plate 453 made of glass was placed and fixed on a lower substrate 452 having V-shaped alignment grooves from above.
- the two optical fibers could be easily connected in the V-shaped alignment groove without causing surrounding contamination. Also, due to the flexibility of the adhesive connecting member, the degree of freedom around the end face of the optical fiber is increased, so that excessive pressing force is not applied to the optical fiber, and as a result, extremely good handling without breaking the optical fiber occurs.
- the optical connection was able to be made by the nature. In addition, since the end face of the optical fiber adhered due to the adhesiveness of the adhesive connecting member, the connection loss was as small as 0.3 dB. In the connection structure of the formed optical fiber, D was 50 m and D was 65 ⁇ m.
- connection member fixed to the support member can be easily attached to the end face of the optical fiber simply by moving the optical fiber, and the handling property is improved. It was good.
- the adhesive connecting member was attached to the end face of the optical fiber.
- the optical connection step when the end faces of the optical fiber and the optical fiber are abutted with each other via the adhesive connecting member, the optical fiber is pressed until the adhesive connecting member has a thickness of 10 m to be deformed internally.
- Optical fibers were optically connected in the same manner as in Example 1 except that the process was adopted. At this time, when the connection loss was measured, it was 0.2 dB.
- D was smaller than the fiber cladding diameter (unmeasurable), and D was about 85 m.
- connection alignment member 46 (size 10 mm ⁇ 20 mm ⁇ 40 mm) had a deep groove 461 having a width of 0.25 mm and a pair of through holes 462 a and 462 b at the center.
- the sheet-shaped adhesive connecting member 21 used in Example 1 was sandwiched between two transparent plastic resin supporting members 31a and 31b (2 mm square, 0.1 mm thick) having a cavity in the center, and the sheet-shaped adhesive connecting member 21 was sandwiched. A cartridge containing an adhesive connecting member was produced. This cartridge was mounted in the deep groove 461 of the connecting alignment member as shown in FIG.
- connection alignment member the sheet material of the adhesive connection member is included, and a part of the sheet-shaped adhesive connection member is cut off, and optical connection is directly performed.
- the bonding force of the adhesive connecting member can be connected to the optical fiber by one member.
- an optical connection that is structurally stable was made possible, and after the optical connection structure was manufactured, adhesion of dust and dirt to the adhesive connecting member could be prevented, and production efficiency was improved.
- D is smaller than the fiber cladding diameter (not measurable), and D is about 65 m.
- FIG. 39 is a view for explaining an example of the optical connection structure (optical connector) of the present invention when a single-core optical fiber is connected
- FIG. FIG. 39 (b) is a view showing a connected state.
- the end of the optical fiber 10 whose coating has been removed and creeped is inserted into the through hole 761 of the ferrule 76 of the FC connector provided in the FC connector plug 72 so that the ferrule end face 762 and the optical fiber end are almost aligned.
- Adjust the epoxy resin in the through hole as an adhesive (Epotech 35
- the optical fiber was fixed by pouring in 3) and thermosetting.
- a sheet-like adhesive connecting member 21 made of acrylic adhesive resin with a film thickness of 25 ⁇ m is placed on the ferrule end face in close contact with air so that air cannot enter.
- the ferrules were inserted into a split sleeve 49 having the same diameter, and the opposing ferrules were butted against each other to connect the ferrules to each other to form the optical connection structure of the present invention (FIG. 39 (b)).
- FIG. 40 is a view for explaining an example of the optical connection structure (optical connector) of the present invention when connecting a multi-core optical fiber
- FIG. 40 (a) shows the components of the optical connection structure.
- FIG. 40 (b) is a diagram showing a connected state.
- FIG. 41 (a)-(c) is an explanatory view showing a step of connecting the optical connector of FIG. 40. This figure shows a case where four optical fiber ribbons are used! /, But the number of optical fibers is not limited to this.
- the guide pins 47a and 47b were inserted into the two guide pin holes 751a and 751a of one MT ferrule, and the sheet-shaped adhesive connecting member 21 was placed on the end face 753 of the MT ferrule (see FIG. 41 (b)).
- the MT ferrule 75a was connected to the other MT ferrule 75b via the guide pins 47a and 47b to form the optical connection structure of the present invention (FIGS. 40 (b) and 41 (c)).
- the optical connection structure of the present invention can connect a plurality of optical fibers at once using a single sheet-like adhesive connection member. However, good optical connection can be achieved.
- the optical connection structure of the present invention can also be applied to a ferrule in which an end face of an optical fiber used for ordinary connector connection is polished.
- a ferrule in which an end face of an optical fiber used for ordinary connector connection is polished.
- FIG. 42 is a perspective view showing the components of the optical connection structure when the present invention is applied to an MPO-type optical connector.
- FIG. 43 is a diagram illustrating a connection state in the MPO-type optical connector of FIG. 42.
- FIG. 43 (a) is a plan view showing a state before connection
- FIG. 43 (b) is a plan view showing a state after connection. is there.
- the present invention is applicable to existing multi-core connectors such as MT-RJ, MPX, Mini-MT, Mini-MPO and other adapters and connector plugs that include MT ferrules. Is possible.
- the MPO-type optical connector includes a sheet-like adhesive connecting member 21, optical fiber tape cores 15a and 15b, MT ferrules 75a and 75b for aligning and holding optical fibers, and a push-pull. It is composed of MPO connector plugs 71a and 71b which also have a housing force for detachment by a mechanism, and a connection adapter 50 for connecting a pair of MPO connector plugs.
- the sheet-shaped adhesive connecting member 21 is placed on the end face of the MT ferrule 75a, and the guide pin is inserted into the guide pin hole on the end face of the MT ferrule 75a fixed to the MPO connector plug 71a. Insert 47a and 47b (Fig. 43 (a)). Then, the MPO connector plugs 71a and 71b are connected to the connection adapter 50 by the housing while aligning the MT ferrule 75b by inserting guide pins into the guide pin holes of the opposed MT ferrule 75b ( Figure 43 (b)). The end face of the MT ferrule may not be polished. At the time of optical connection, the MT ferrule end faces adhere to each other via the adhesive connection member inside the adapter, and an optical connection structure is formed.
- the optical connection structure of the present invention even when an MPO connector plug is used, low-loss connection can be performed without performing a polishing process.
- the MPO connector plug is a push-pull type, so it is easy to attach and detach.
- an adapter having a sheet-like adhesive connecting member arranged as shown in FIGS. 19 and 20 can be used as the adapter.
- FIG. 44 (a)-(d) shows an optical connection structure using an MT ferrule (optical connector) according to the present invention.
- FIG. 45 is an explanatory view showing a connection process when a sheet-shaped adhesive connection member provided with a support member is used in the case of (c), and
- FIG. 45 is a front view of the guide pin support member used in the connection process shown in FIG. FIG.
- the two guide pins 47a and 47b are gripped by the guide pin support member 57, and both ends of the sheet-shaped adhesive connection member 21 are connected to the respective guides. It is installed near the center of the pin, whereby the sheet-like adhesive connecting member 21 is supported by two guide pins 47a, 47b.
- FIG. 44 (a)-(d) shows an optical connection structure using an MT ferrule (optical connector) according to the present invention.
- FIG. 45 is an explanatory view showing a connection process when a sheet-shaped adhesive connection member provided with a support member is used in the case of (c)
- the guide pin support member 57 has two guide pin insertion grooves 571a and 571b, and the projection flat plates 95a and 95b slide into slit holes communicating with the guide pin insertion grooves from both sides. It is inserted freely.
- the protruding flat plate is pressed after the guide pin is placed in the guide pin insertion groove, the protruding flat plate is pushed into the guide pin insertion groove, and the groove is surrounded by the protruding flat plate, whereby the guide pin is gripped. Since the guide pin support member 57 has a cavity 572 inside, when the guide pin is placed, the sheet-like adhesive connection member comes to be located in the cavity, and the guide pin support member is connected to the connection member. None contact with,.
- both ends of the guide pin held by the guide pin support member are inserted into the guide pin insertion holes 75la, 751b of the pair of MT ferrules 75a, 75b to which the optical fibers 10a, 10b are fixed, respectively.
- Push the MT ferrule into contact with the pin support member 57 (Fig. 44 (b)).
- the opposed MT ferrules 75a and 75b are aligned by the guide pins, and the guide pin support member is released from the guide bin force by releasing the projecting flat plate of the guide pin support member (FIG. 44 (c)).
- Connect the ferrules together (Fig. 44 (d)).
- FIG. 46 (a)-(c) is a perspective view showing components and connection steps of an optical connector using the present invention for a 4-core MT fiber.
- the support member 32 is a cylindrical member having a frame-shaped cavity having substantially the same shape as the outer periphery of the MT ferrule, and has a width of 1. near the center of one end.
- a 5 mm sheet-like adhesive connecting member 21 is placed.
- the other end is an open end, the inside of the tubular member is hollow, and the optical fiber
- the sheet-shaped viscous connection member 21 is placed on the end surface of the MT ferrule 75a by fitting the MT ferrule 75a with the fixed to the cavity (FIG. 46 (b)).
- connection member can be easily attached to the MT rule, and after the connection is completed, the support member need only be removed from the MT ferrule cover. Can be detached.
- an alignment member 42 (size: 5 mm ⁇ 12 mm ⁇ 3 mm) having a regular triangular V-shaped alignment groove 421 having a side of 0.3 mm, a plate shape
- Two upper plates 81a, 81b (size 5mm X 5mm X 3mm), optical fiber cores (diameter 0.25mm) 10a, 10b whose ends have been stripped and cut, adhesive connection held by support member 34 Member 25 was prepared.
- the support member 34 uses a cylindrical pin having a diameter of 0.1 mm and a length of 3 mm.
- the adhesive connecting member 25 uses a urethane elastomer resin adjusted to a refractive index of 1.46.
- the connecting member was applied and attached so as to have a thickness of about 0.1 mm to 0.4 mm.
- the optical fibers 10a and 10b are placed in the alignment groove 421, and one optical fiber 10a is placed at a position about 2 mm away from the optical fiber 10b.
- the support member 34 was placed substantially at the center of the upper part of the alignment groove 421 of the alignment member 42 sandwiched between the end faces of the optical fibers 10a and 10b. At this time, although not shown, the support member 34 was lightly pressed by a spring from above so that the support member 34 was not easily lifted.
- the optical fibers 10a and 10b were moved inward, brought into contact with the adhesive connecting member 25, and further moved to optically connect the end faces of the optical fibers 10a and 10b.
- the adhesive connecting member 25 supported by the support member 34 on the optical axis adheres to the end faces of the optical fibers 10a and 10b, and further pushes the optical fibers 10a and 10b.
- the fibers 10a and 10b were connected to each other (see FIGS. 24 (a)-(d)).
- the optical transmission medium connection method of the present invention by mounting the support member 34 provided with the adhesive connection member 25 on the V-groove, the required amount of adhesive connection to the end faces of the optical fibers 10a and 10b. Parts could be supplied.
- the obtained optical connection structure is formed by placing the adhesive connecting member 25 on the upper side, so that the connection can be performed without performing a complicated operation such as coating when working on the substrate. did it.
- the adhesive connecting member 25 since only a necessary amount of the adhesive connecting member 25 is supplied into the alignment groove 421, light is not generated due to misalignment due to the adhesive connecting member which does not cause surrounding contamination.
- the work efficiency was improved by simply removing the supporting member. The connection loss at this time was less than 0.3 dB, and there was no problem with the optical characteristics.
- a regular triangular groove 422 having a length of 0.1 mm and intersecting the alignment groove 421 was used as the alignment member 42 used in Example 13.
- Example 13 was repeated except that one holding member 81 having a regular triangular groove with a piece of 0.2 mm at a position corresponding to the groove 422 of the alignment member 42 was used.
- Optical connection was performed using the same members as in.
- FIGS. 47 (a) and (b) In order to manufacture an optical connection structure using the above members, first, as shown in FIGS. 47 (a) and (b), the optical fibers 10a and 10b are Then, the support member 34 was placed in the groove 422 of the alignment member 42. Then, as shown in FIG. 47 (c), the pressing member 81 is placed from above so that the supporting member 34 fits into the groove so that the optical fibers 10a and 10b do not float.
- the optical fibers 10a and 10b were moved and brought into contact with the adhesive connecting member 25. Then, by pushing the optical fibers 10a and 10b, the adhesive connecting member 25 supported by the support member 34 on the optical axis adheres to the end faces of the optical fibers 10a and 10b, and as shown in FIG. As described above, the optical fibers 10a and 10b were further optically connected to each other via the adhesive connection member 25 by further pushing. At the same time, the support member 34 moved upward, and did not hinder the connection of the optical fibers 10a, 10b and did not damage the end faces of the optical fibers 10a, 10b.
- connection structure of the optical transmission medium of this embodiment the provision of the groove 422 crossing the alignment groove 421 in the alignment member 42 allows the support member 34 to be easily placed, and We were able to align.
- the supporting member 34 The work efficiency has been improved just by removing.
- the 1S optical fibers 10a and 10b that were connected 100 times repeatedly were not damaged.
- the connection loss at this time was 0.2 dB or less, and there was no problem with the optical characteristics.
- a member (length 3 mm) was prepared.
- the alignment member has two holes 423a and 423b (0.15mm in diameter and 3mm in depth) on both sides of the alignment groove, except that the projections 341a and 341b of the support member 34 can be inserted into these holes.
- Optical connection was performed using the same members as in Example 1.
- the material of the support member 34 was stainless steel.
- the adhesive connecting member 25 used in Example 1 was applied to the lower portion of the outer peripheral portion of the support member 34 by brush and attached thereto.
- the optical fibers 10a and 10b are placed with the end faces facing both sides of the support member 34 on the alignment groove 421, and then aligned.
- the protrusions 341a and 341b of the support member 34 having the adhesive connection member 25 are inserted into the two holes 423a and 423b of the member 42, and the support member 34 is placed on the alignment groove 421 of the alignment member 42 with respect to the alignment groove. They were placed so that they intersect.
- an upper plate (not shown) was placed on each of the optical fibers 10a and 10b to hold down each optical fiber.
- optical fibers 10a and 10b are moved inward, the tips of the optical fibers are brought into contact with the adhesive connecting member 25, and further moved to optically connect the end faces of the optical fibers 10a and 10b,
- the optical connection structure of the present invention was formed (see FIG. 27).
- the alignment member 42 and the support member 34 can be easily connected only by inserting the protrusions 341a and 341b of the support member 34 into the holes 423a and 423b provided in the alignment member 42.
- the connection loss at this time was less than 0.2 dB, and there was no problem with the optical characteristics.
- the optical connection structure was formed as shown in FIG. That is, first, using the support member 34 of Example 14, a film-shaped adhesive connection member 25 was wound around the outer periphery of the support member 34 within a range of 2 mm in width as shown in FIG. 28 (d). At the end of the circuit, the adhesive connecting members were put together, and the adhesive connecting member was suspended by about 0.2 mm below the outer periphery. Up Optical connection was performed using the same members as in Example 14 except that the support member 34 supporting the adhesive connection member 25 was used as described above. Further, as the film of the above-mentioned adhesive connecting member, an acrylic adhesive resin (refractive index: 1.467) which was made into a film and had a thickness of 25 / zm was used.
- the adhesive connection member 25 formed into a film as described above has a uniform thickness, it is uniformly pressed against the optical fibers 10a and 10b. As a result, a stable optical connection with an optical loss of 0.18 dB or less was achieved. In addition, the detachability of the adhesive connecting member 25 only requires peeling off the film, thus improving workability.
- the adhesive connecting member 25 is made of an adhesive resin, the adhesive connection member 25 easily comes into close contact with the end faces of the optical fibers 10a and 10b due to the wettability of the resin, and the adhesive force is appropriate due to the adhesive force.
- the adhesiveness between the optical fibers 10a and 10b and the adhesive connecting member 25 could be maintained with a moderate pressing force.
- the adhesive connecting member 25 is flexible, the optical connection can be performed with extremely good handling properties without breaking the end faces of the optical fibers 10a and 10b. Further, because of the re-peelability, the adhesive connecting member 25 attached to the V-groove and the optical fibers 10a and 10b can be easily peeled off, so that it can be replaced and re-connected.
- the optical connection structure shown in FIG. 48 includes optical fiber fixing members 86a and 86b, an alignment member 42, a pin-shaped support member 34, a pin-shaped introduction member 82, optical fibers 10a and 10b, and a pressing member.
- a member 87 is provided.
- the tip of the optical fiber 10a is fitted and held in the fixing portion 86la of one optical fiber fixing member 86a, and the tip of the optical fiber 10b is fixed to the fixing portion 861b of the other optical fiber fixing member 86b. And held.
- the end faces of the optical fibers 10a and 10b were made to protrude 1.1 mm from the end face of the fixed portion.
- An elastic body (acrylic adhesive) 95 was attached to a pressing projection 871 of a pressing member 87 for applying an upward force to the support member 34 and the pin-shaped introduction member 82.
- optical fiber connection members 86a and 86b holding the optical fibers 10a and 10b are mounted on the alignment member 42, and at this time, The optical fibers 10a and 10b were temporarily fixed so as to be placed in the alignment grooves 421 of the alignment member 42. This At this time, as shown in FIG. 48 (a), the tip of the optical fiber is placed in the alignment groove 421, but at the tip of the optical fiber 10b, it rises about 0.3 mm from the alignment groove 421. Was crouching.
- the pin-shaped introduction member 82 and the support member 34 are placed between the optical fiber fixing members 86a and 86b on the alignment member 42. did.
- the connecting member 25 made of adhesive resin was applied to the lower part of the outer peripheral portion of the supporting member 34.
- the latch portion 872 of the pressing member 87 is engaged with the engagement portion 424 of the alignment member 42, and the pressing member 87 is pressed against the alignment member 42 by an upward force, thereby forming a pin-shaped member.
- the introduction member 82 and the support member 34 were pressed onto the alignment groove 421.
- the leading end of the optical fiber 1 Oa protruding from the optical fiber fixing member 86a is pressed by the pin-shaped introduction member 82 into the alignment groove, and the leading end of the optical fiber 10b is moved from the right fiber fixing member 86b. It is in a state of protruding from the alignment groove 421.
- the tip of the optical fiber 10b comes into contact with the lower outer peripheral portion of the support member 34 and is introduced into the alignment groove 421 while being pressed downward by the lower outer peripheral portion.
- the adhesive connecting member 25 at the lower portion of the outer peripheral portion of the support member 34 came into contact with the end face of the optical fiber 10b, so that the adhesive connecting member was attached to the end face of the optical fiber.
- the optical fibers 10a and 10b were aligned with each other by pressing the optical fiber 10b downward.
- the ends of both optical fibers 10a and 10b were brought into contact and connected, whereby the optical connection structure of the present invention was produced.
- the support member 34 not only has the function of supporting the adhesive connection member 25 but also presses the support member 34 downward, thereby forming the optical fibers 10a and 10b. Positioning could also be performed.
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Abstract
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Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/579,459 US7422375B2 (en) | 2003-11-19 | 2004-11-17 | Optical connection structure and optical connection method |
EP04818916.1A EP1686402B1 (en) | 2003-11-19 | 2004-11-17 | Optical connection structure and optical connection method |
Applications Claiming Priority (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003-388707 | 2003-11-19 | ||
JP2003388707 | 2003-11-19 | ||
JP2004-086343 | 2004-03-24 | ||
JP2004086343A JP4043448B2 (ja) | 2004-03-24 | 2004-03-24 | 光学接続構造とその作製方法、および光伝送媒体の端面処理方法 |
JP2004170679A JP4109653B2 (ja) | 2004-06-09 | 2004-06-09 | 光コネクタ、およびそれに用いる接続用割スリーブ、支持部材およびアダプタ |
JP2004-170679 | 2004-06-09 | ||
JP2004-211337 | 2004-07-20 | ||
JP2004211337A JP3993590B2 (ja) | 2004-07-20 | 2004-07-20 | 光学接続構造とその作製方法、及びそれに用いる支持部材 |
Publications (1)
Publication Number | Publication Date |
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WO2005050273A1 true WO2005050273A1 (ja) | 2005-06-02 |
Family
ID=34623901
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/017065 WO2005050273A1 (ja) | 2003-11-19 | 2004-11-17 | 光学接続構造および光学接続方法 |
Country Status (6)
Country | Link |
---|---|
US (1) | US7422375B2 (ja) |
EP (4) | EP1686402B1 (ja) |
KR (4) | KR20080067015A (ja) |
CN (1) | CN102213801A (ja) |
HK (1) | HK1128332A1 (ja) |
WO (1) | WO2005050273A1 (ja) |
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US7742670B2 (en) | 2007-10-01 | 2010-06-22 | Corning Cable Systems Llc | Index-matching gel for nanostructure optical fibers and mechanical splice assembly and connector using same |
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-
2004
- 2004-11-17 CN CN2011101805926A patent/CN102213801A/zh active Pending
- 2004-11-17 KR KR1020087015579A patent/KR20080067015A/ko active Application Filing
- 2004-11-17 EP EP04818916.1A patent/EP1686402B1/en not_active Not-in-force
- 2004-11-17 EP EP11005822A patent/EP2392954A1/en not_active Withdrawn
- 2004-11-17 US US10/579,459 patent/US7422375B2/en active Active
- 2004-11-17 KR KR1020087002906A patent/KR100867261B1/ko active IP Right Grant
- 2004-11-17 WO PCT/JP2004/017065 patent/WO2005050273A1/ja active Application Filing
- 2004-11-17 KR KR1020097005174A patent/KR20090033279A/ko not_active Application Discontinuation
- 2004-11-17 EP EP11005824A patent/EP2400326A1/en not_active Withdrawn
- 2004-11-17 KR KR1020067012149A patent/KR100820524B1/ko active IP Right Grant
- 2004-11-17 EP EP11005823A patent/EP2418524A1/en not_active Withdrawn
-
2009
- 2009-06-26 HK HK09105776.0A patent/HK1128332A1/xx not_active IP Right Cessation
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Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7628548B2 (en) | 2007-10-01 | 2009-12-08 | Corning Cable Systems Llc | Index-matching gel for nanostructure optical fibers and mechanical splice assembly and connector using same |
US7742670B2 (en) | 2007-10-01 | 2010-06-22 | Corning Cable Systems Llc | Index-matching gel for nanostructure optical fibers and mechanical splice assembly and connector using same |
US8152387B2 (en) | 2007-10-01 | 2012-04-10 | Corning Cable Systems Llc | Index-matching gel for nanostructure optical fibers and mechanical splice assemble and connector using same |
WO2009123313A1 (ja) * | 2008-04-04 | 2009-10-08 | 住友電気工業株式会社 | 光モジュール及びその組立方法 |
JP2009251224A (ja) * | 2008-04-04 | 2009-10-29 | Sumitomo Electric Ind Ltd | 光モジュール及びその組立方法 |
WO2023176771A1 (ja) * | 2022-03-17 | 2023-09-21 | 住友電工オプティフロンティア株式会社 | 光ファイバ位置決め部品及び光ファイバ融着接続機 |
Also Published As
Publication number | Publication date |
---|---|
EP1686402A1 (en) | 2006-08-02 |
US7422375B2 (en) | 2008-09-09 |
US20070086707A1 (en) | 2007-04-19 |
KR100820524B1 (ko) | 2008-04-11 |
HK1128332A1 (en) | 2009-10-23 |
KR100867261B1 (ko) | 2008-11-06 |
KR20090033279A (ko) | 2009-04-01 |
EP2400326A1 (en) | 2011-12-28 |
EP2418524A1 (en) | 2012-02-15 |
KR20080021160A (ko) | 2008-03-06 |
EP2392954A1 (en) | 2011-12-07 |
EP1686402A4 (en) | 2010-09-01 |
EP1686402B1 (en) | 2013-07-24 |
CN102213801A (zh) | 2011-10-12 |
KR20060105786A (ko) | 2006-10-11 |
KR20080067015A (ko) | 2008-07-17 |
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