WO2006046391A1 - 充填剤組成物及びそれを使用した内部に空孔を有する光ファイバーの製造方法 - Google Patents
充填剤組成物及びそれを使用した内部に空孔を有する光ファイバーの製造方法 Download PDFInfo
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- WO2006046391A1 WO2006046391A1 PCT/JP2005/018513 JP2005018513W WO2006046391A1 WO 2006046391 A1 WO2006046391 A1 WO 2006046391A1 JP 2005018513 W JP2005018513 W JP 2005018513W WO 2006046391 A1 WO2006046391 A1 WO 2006046391A1
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- Prior art keywords
- optical fiber
- general formula
- filler composition
- compound represented
- holes
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/02—Optical fibres with cladding with or without a coating
- G02B6/02295—Microstructured optical fibre
- G02B6/02314—Plurality of longitudinal structures extending along optical fibre axis, e.g. holes
- G02B6/02342—Plurality of longitudinal structures extending along optical fibre axis, e.g. holes characterised by cladding features, i.e. light confining region
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F299/00—Macromolecular compounds obtained by interreacting polymers involving only carbon-to-carbon unsaturated bond reactions, in the absence of non-macromolecular monomers
- C08F299/02—Macromolecular compounds obtained by interreacting polymers involving only carbon-to-carbon unsaturated bond reactions, in the absence of non-macromolecular monomers from unsaturated polycondensates
- C08F299/026—Macromolecular compounds obtained by interreacting polymers involving only carbon-to-carbon unsaturated bond reactions, in the absence of non-macromolecular monomers from unsaturated polycondensates from the reaction products of polyepoxides and unsaturated monocarboxylic acids, their anhydrides, halogenides or esters with low molecular weight
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J163/00—Adhesives based on epoxy resins; Adhesives based on derivatives of epoxy resins
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J163/00—Adhesives based on epoxy resins; Adhesives based on derivatives of epoxy resins
- C09J163/10—Epoxy resins modified by unsaturated compounds
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/02—Optical fibres with cladding with or without a coating
- G02B6/02295—Microstructured optical fibre
- G02B6/02314—Plurality of longitudinal structures extending along optical fibre axis, e.g. holes
- G02B6/02342—Plurality of longitudinal structures extending along optical fibre axis, e.g. holes characterised by cladding features, i.e. light confining region
- G02B6/02376—Longitudinal variation along fibre axis direction, e.g. tapered holes
Definitions
- the present invention relates to a filler composition for filling a hole in an optical fiber having holes inside a photonic crystal fiber or the like, and more specifically, a fluorine having an acrylic group-containing specific structure.
- the present invention relates to a filler composition comprising a compound and a fluorine compound having a specific structure containing an epoxy group, a method for producing an optical fiber having pores therein, and an optical fiber having pores therein.
- An optical fiber is widely used for optical communication, optical application measurement, and the like.
- optical communication is being widely used in wide area or LAN optical communication networks, in-car communication, control of electrical products and industrial equipment.
- conventional optical fiber that forms a waveguide called a core by adding additives to silica glass In the one hand, it was pointed out that there was a limit in optical characteristics.
- an optical fiber having a new structure in which a hole cap and a shoe are provided in the cross section has been attracting attention.
- an optical fiber has a core part that forms a central part through which light passes and a clad part force that forms the periphery of the core part.
- the optical fiber having the new structure described above has a plurality of tubular holes extending along the axial direction of the optical fiber in the core portion and the Z or clad portion. A number of holes appear.
- Such an optical fiber has a regular arrangement and an irregular arrangement of holes in the cross section, and there are a so-called holey fiber and a photonic bandgap fiber. Some are also called photonic crystal fibers. Since the optical fiber having the above-mentioned new structure always has a uniform name, several names may be used in duplicate.
- index-guided photonic crystal fiber for example, index-guided photonic crystal fiber, air-clad fiber, hole-added fiber, and photonic band. These are the same as the gap-gap fibers, and all of them can be referred to as photonic crystal fibers, although the hole arrangement in the cross section is different.
- the photonic crystal fiber has a regular arrangement of holes in the cross section.
- an optical fiber having a hole in the inside thereof is indicated along the axial direction of the optical fiber in the core and Z or the clad as pointed out as the optical fiber having the new structure described above. It should be understood to include an optical fiber of any structure that has a plurality of elongated tubular cavities and in which a number of cavities appear in the cross-section when the optical fiber is cut.
- the arrangement of the holes in the plane can be either regular or irregular.
- Such optical fibers with holes inside, especially photonic crystal fibers are characterized by the ability to realize a single mode at an arbitrary wavelength, resistance to bending with a high refractive index ratio, and numerical aperture.
- the characteristics of the conventional optical fiber are unmatched, such as the large refractive index and the average refractive index can be changed depending on the size and arrangement of the holes, and the refractive index and polarization characteristics can be designed as desired. It has been pointed out.
- a filler for holes in the end face it is usual to arrange holes in the cladding, so that it can have a lower refractive index than that of the core and has good filling ability to the holes.
- it is required to be an optical resin that ensures properties required for an optical fiber, such as heat resistance in consideration of heat generation during polishing, and good end surface polishing processability.
- optical resin For example, a photopolymerizable composition having a specific epoxy-based fluorine compound power (see, for example, Patent Document 1), a photopolymerizable composition having a specific acrylate-based fluorine compound power (for example, Patent Document 2). , See Patent Document 3).
- these compositions generally have a refractive index of 1.45 or higher and are not low refractive indexes.
- an optical resin having an acrylic group or epoxy group-containing fluorine compound power for example, there is an optical thin film using a cured product of an epoxy compound having a fluorine-containing alkylene group (see, for example, Patent Document 4). ) 0
- This technology is intended to improve the performance of optical coatings, and although it is described that an optical thin film with excellent scratch resistance can be formed, it is exclusively used for antireflection coatings. It belongs to the technical field and is not related to the filler.
- connection problem peculiar to an optical fiber having a hole inside is a problem that does not exist in a conventional optical fiber.
- What is simply a technique for bonding a fiber and a connector with an adhesive ?
- the optically polished end faces of the connectors are fixed together so that they are end face processing problems.
- low viscosity, heat resistance, fillability, and polishing processability are required. It is necessary to satisfy all of the adhesive strength above the required level, and fillers that contribute to this are still known!
- Patent Document 1 Japanese Patent Application Laid-Open No. 2000-154233
- Patent Document 2 Japanese Patent Laid-Open No. 62-265248
- Patent Document 3 Japanese Patent Laid-Open No. 63-101409
- Patent Document 4 Japanese Patent Laid-Open No. 11-133207
- the present invention can achieve a low refractive index, and the pores are excellent in low viscosity, heat resistance, filling property, polishing workability, and adhesive strength. It is another object of the present invention to provide a method for manufacturing an optical fiber having holes therein and an optical fiber having holes therein.
- the present inventor has found that a specific structure containing an acrylic group.
- the inventors have found that the above object can be achieved by using a fluorine compound having a specific structure and a fluorine compound having a specific structure containing an epoxy group, thereby completing the present invention. That is, the present invention provides the above-described hole of an optical fiber having a hole inside, which contains a compound represented by the following general formula (I), a compound represented by the following general formula (II), and a photopolymerization initiator. It is a filler composition for filling.
- a plurality of a are the same and represent 0 or 1
- a plurality of b are the same and represent 0 or 1
- m is an integer of 4 to 12.
- Tfl represents a glycidyl group
- the present invention also includes the step of filling the filler composition into the pores in the end face of the optical fiber having pores therein, and the step of irradiating the filled filler composition with ultraviolet rays.
- the present invention further includes a step of filling the filler composition into the pores in the end face of the optical fiber having pores therein, and a step of irradiating the filled filler composition with ultraviolet rays. And a method of manufacturing an optical fiber having a hole in the polished end face including the step of polishing the end face after the ultraviolet irradiation step.
- the sealing method and the manufacturing method may further include a step of heat curing treatment after the ultraviolet irradiation step.
- the pores of the optical fiber having holes therein are filled with the filler composition, and the holes are in the longitudinal direction corresponding to the axial direction of the optical fiber. It is also an optical fiber having a hole in the inside that is partially sealed.
- the present invention satisfies all of low viscosity, heat resistance, fillability, polishing processability, and adhesive strength above the required level.
- the filler composition of the present invention can achieve a low refractive index due to the above-described configuration, and has a low viscosity and excellent heat resistance.
- the filler composition of the present invention has a refractive index at 25 ° C. measured in a liquid before curing (D-line refractive index, expressed as n in the present specification) according to the above-mentioned configuration. 1.34
- the filler composition of the present invention has a cured product having a Tg of 80-: L 10 ° C. and excellent heat resistance and polishing processability due to the above-described structure.
- the filler composition of the present invention has a viscosity of 10 to 500 mPa ′s at 25 ° C. and excellent filling properties due to the above-described configuration.
- the filler composition of the present invention achieves an adhesive strength of 4. ONZmm 2 or more and is excellent in filling processability due to the above-described configuration.
- the hole sealing method of the present invention has the above-described configuration, and seals the above-mentioned hole of the optical fiber having holes inside while ensuring heat resistance and polishing processability at a lower refractive index than the core part. can do.
- the manufacturing method of the present invention has a structure in which the pores in the end surface are filled with the filler composition and the end surface in which foreign matter such as polishing debris is prevented from entering the pores is polished inside.
- An optical fiber having a hole can be realized.
- the optical fiber according to the present invention has an inner surface in which the end surface is polished by the above-described configuration, in which the holes in the end surface are filled with the filler composition and foreign matter such as polishing dust is prevented from entering the holes.
- This is an optical fiber having a hole in the hole.
- the filler composition of the present invention comprises a compound represented by the above general formula (I), a compound represented by the general formula ( ⁇ ), and a photopolymerization initiator.
- a plurality of a's are the same and represent 0 or 1.
- a plurality of b's are the same and represent 0 or 1.
- a is 0, a is 1, and in each of these cases, b is 0 and b is 1.
- a, b, and m in formula (I) and a, b, and m in formula ( ⁇ ⁇ ⁇ ⁇ ) are independent of each other.
- m 2 m , —O (CH)-(CF)-(CH) O and the like.
- m is 4-12, preferably 6-10
- m is 4-12, preferably 6-1
- the compounding weight ratio of the compound represented by the general formula (I) and the compound represented by the general formula (II) is represented by the compound Z represented by the general formula (I) —general formula ( ⁇ ). It is preferable that the compound is 5Z95 to 95Z5 from the viewpoint of a balance of polishing processability, adhesiveness, and heat resistance.
- c represents 0 or 1.
- d represents an integer of 0-2.
- n represents an integer from 1 to L 1.
- Tf3 represents a glycidyl group or CH ⁇ CH—C (0).
- A represents H or F.
- Examples of the compound represented by the general formula ( ⁇ ) include 2, 2, 2 trifluoroethyl.
- the compounding amount of the compound represented by the general formula (III) is the compound represented by the general formula (I), the compound represented by the general formula (II), and the compound represented by the general formula (III).
- the total power of less than 50 parts by weight per 100 parts by weight also favors the viewpoints of the photopolymerizability and heat resistance of the composition. More preferably, it is less than 35 parts by weight.
- the method for producing the compound represented by the above general formula (I) and the compound represented by the general formula ( ⁇ ) takes, for example, a compound in which the terminal Tf is an epoxy group, for example, a perfluoro group-containing di- or di-
- the reaction can be carried out by reacting a monoalcohol with an epoxypropyl halide, or after reacting a perfluoro group-containing di- or monoalcohol with a gallic halide, followed by oxidation with a peracid such as formic acid, peracetic acid or perpropionic acid.
- acrylic acid may be ester-reacted with perfluoro group-containing di- or monoalcohol.
- a photoradical polymerization initiator and a photopower thione polymerization initiator are used in combination from the viewpoint of curability.
- photo radical polymerization initiators include acetophenones, aminoacetophenones, benzophenones, Michler ketones, benzyls, benzoins, benzoin ethers, benzyldimethylketals, and thixanthones.
- photopower thione polymerization initiator include diazo-um salt, sulfo-um salt, and ododonium salt.
- Photo-radical polymerization initiators such as trimethylbenzoyldiphenylphosphine oxide; benzenediazo-hexafluoroantimonate, benzenediazo-umhexafluorophosphate, benzenediazo-umhexafluoroborate , Aromatic diazo-um salt, diarylhodonium salt, tria Rylsulfo-um salt, triarylselenium salt, triallylpyrylium salt, benzylpyridium thiocyanate, dialkylphenacylsulfo-um salt, dialkylhydroxyphenylsulfo-um salt, meta-oxycene Light power thione polymerization initiators such as compounds Can be mentioned.
- radical photopolymerization initiators and photopower thione polymerization initiators can be used alone or in combination of two or more.
- sulfo-um salt sufficient hardness may not be obtained by UV irradiation alone.
- ododonium salt can be cured quickly by using alone or in combination with a sensitizer, and sufficient hardness can be obtained only by ultraviolet curing.
- the addition amount of the photopolymerization initiator is preferably 1 to L0 parts by weight, particularly preferably 0.5 to 5 parts by weight, with respect to 100 parts by weight of the photopolymerizable compound in the composition. It is.
- anthracene 9, 10-dimethoxyanthracene, 9, 10-dipropoxyanthracene, 9, 10-dibutoxyanthracene, 2-ethynole-9, 10- Dimethoxyanthracene, 2-ethyl-9,10-dibutoxyanthracene, 2-ethyl-9,10-dipropoxyanthracene and the like can be used.
- the addition amount of these sensitizers is preferably 1 to 200 parts by weight, particularly preferably 10 to L00 parts by weight with respect to 100 parts by weight of the photopolymerization initiator.
- additives may be used in the filler composition of the present invention as long as the object of the present invention is not impaired.
- additives include silane coupling agents, leveling agents, and antifoaming agents.
- silane coupling agent has the effect of improving the familiarity with inorganic optical fibers.
- silane coupling examples include ⁇ -glycidoxypropyltrimethoxysilane, ⁇ -glycidoxypropyltriethoxysilane, 13- (3,4-epoxycyclohexyl) ethyltrimethoxysilane, 13- ( 3, 4-Epoxycyclohexyl) ethyltriethoxysilane, vinyltrimethoxysilane, vinyltriethoxysilane and the like.
- Such other components can be used as long as the following properties such as refractive index, Tg, and viscosity are not impaired.
- the blending amount of the other additives is preferably 10 parts by weight or less, more preferably 5 parts by weight or less, in 100 parts by weight of the filler composition of the present invention.
- the refractive index at 25 ° C of the cured product after polymerization (n)
- the refractive index of the core Needs to be lower than the refractive index of the core. If the refractive index is higher than that of the core, the light confinement effect is lost, and light leaks toward the filler with a high refractive index. Since the refractive index (n) of quartz used for the core is 1. 452, the filler after polymerization The refractive index of the composition should be less than 1.452. Further, it is known that the refractive index of the cured product after polymerization is generally about 0.025 higher than the liquid refractive index. From this point of view, the refractive index (n) at 25 ° C measured in the liquid before curing is 1.34 ⁇
- the lower limit is not particularly defined from the viewpoint of the refractive index, but 1. It is technically difficult to achieve a value lower than 34 in view of the balance with the polymerizability. More preferably, 1.35 ⁇ : L40.
- the additive of the silane coupling agent exhibits an action of increasing the refractive index.
- the additive of the compound represented by the general formula ( ⁇ ) exhibits the effect of lowering the refractive index. Therefore, by appropriately using these components, the refractive index of the filler composition of the present invention can be adjusted to the above range.
- the filler composition of the present invention preferably has a Tg of 80 to 110 ° C of the cured product.
- Tg exceeds 110 ° C, it will be too hard and cracks will be generated in the pores during cutting. More preferably, it is 80 to 100 ° C.
- the filler composition of the present invention preferably has a viscosity at 25 ° C of from lOmPa's to 500mPa's. If the viscosity is lower than this range, if the fiber is placed sideways during UV irradiation, the filler will flow out, and it will be difficult to control the length to be filled. Conversely, if the viscosity is too high, the pores will be filled. It takes a long time. For example, if a 125 m diameter fiber (hole diameter 4.6 m) is used and the viscosity at 25 ° C is 2500 mPa's, it takes 1 hour or more to fill 5 mm. The upper limit is more preferably 200 mPa's or less, further preferably 10 mPa's or less, and still more preferably 50 mPa's or less.
- the filler composition of the present invention preferably has an adhesive strength of 4. ONZmm 2 or more after 6jZcm 2 UV irradiation and 80 ° C Zl time thermosetting treatment. If the adhesive strength is low, the filler is peeled off when polishing is performed, and the filler is even pushed by the polishing debris that has entered the pores. Furthermore, if the adhesive strength is lower than the shearing force at the time of cutting, the filler will come off. From this point of view, the above range is more preferable, more preferably 5. ONZmm 2 or more.
- the method for producing the filler composition of the present invention is not particularly limited, and the raw materials may be mixed so as to be mixed uniformly.
- an epoxy compound of the general formula (I), an acrylate compound of the general formula ( ⁇ ), an epoxy compound of the general formula (III) or an ataretoy compound for example, an epoxy compound of the general formula (I), an acrylate compound of the general formula ( ⁇ ), an epoxy compound of the general formula (III) or an ataretoy compound, a photopolymerization initiator, a coupling agent, Mix and mix other necessary components, and stir and mix in a conventional manner under heating and reduced pressure.
- the conditions are 40 to 80 ° C., 1 to 20 torr under reduced pressure, and 30 minutes and 2 hours of stirring and mixing.
- the filler composition of the present invention can be suitably cured by UV irradiation.
- the polymerizable is good, for example, 6. even irradiation of less than OjZcm 2 can be sufficiently cured is there.
- the epoxy compound of the general formula (I) and the epoxy compound of the general formula ( ⁇ ) also have good polymerizability, and can be sufficiently cured even with 6. OjZcm 2 irradiation.
- the curability can be further improved by using a thermosetting treatment in combination thereafter. In this case, for example, a thermosetting treatment of about 80 ° C. Zl hours can be used together if desired. .
- the compatibility of the components is excellent, the photoradical polymerization initiator component of the acrylic compound exhibits the catalytic action of the epoxy compound component, and the fast curability is high. Be expected. Therefore, a synergistic effect is exhibited by the combined use of the two, the heat resistance of the epoxy resin and the adhesiveness of the acrylic resin are demonstrated, and the hardness of the epoxy resin is relaxed by the softness of the acrylic resin. The force can also adjust the low refractive index.
- the optical fiber having pores in the inside where the filler composition of the present invention is applied is not particularly limited, but can be suitably applied to a photonic crystal fiber.
- the term “photonic crystal fiber” is referred to as the above-mentioned one having no hole in the core part and one having a hole in the core part, for example, a so-called photonic band gap fiber. It should be understood that both are included.
- the hole sealing method of the present invention includes a step of filling the above-described holes in the end face of the optical fiber having holes therein, a step of irradiating the filled filler composition with ultraviolet rays, and And a step of thermosetting as necessary.
- the blocking method can be suitably applied to the method for manufacturing the optical fiber of the present invention described in detail below.
- the filler composition is filled in the pores in the end face of the optical fiber having pores inside.
- the filler is applied from the end face by utilizing capillary action. May be introduced into the hole, for example, about several millimeters to several tens of millimeters. This filling can be performed in about 10 seconds, for example, and the work efficiency is good.
- irradiation with an irradiation energy of, for example, about 50 mW / cm 2 may be performed for about 60 seconds with a UV lamp or the like.
- the end face is optically polished through a thermosetting treatment of about 80 ° C. Zl hours, thereby preventing the entry of foreign matter into the pores, and the light having holes inside the polished end face.
- One fiber can be manufactured.
- An optical fiber having holes inside the present invention is filled with the filler composition, and the holes are arranged in the longitudinal direction corresponding to the axial direction of the optical fiber. Some are blocked.
- Such an optical fiber is preferably manufactured by the above manufacturing method.
- the resulting optical fiber has a force in which holes are filled with a filler at the end face.
- the core part has a higher refractive index than the filler, so even if the holes in the cladding part are blocked, the core part Light can be confined in the core, and the core portion can function as a light waveguide.
- the end faces of the optical fiber 1 whose end faces are sealed with the filler composition and polished in this way, the end faces of the optical fiber 1 having holes inside and the conventional optical fiber 1, or
- the end face of the optical fiber and the end face of the connector ferrule are fixed together so that the end faces closely contact each other, and the connection of the optical waveguide with the force can be achieved, so that light leaks from the connection part. Don't ask! / A good connection can be achieved.
- connection method between optical fibers or between an optical fiber and an optical connector may be any appropriate connection method, such as fusion, butting and fixing, adhesives, and the like. Adopt applicable methods out of the law.
- each component was mixed in the formulation (parts by weight) shown in Table 1, and the filler was mixed by a conventional method.
- surface is as follows.
- ART—3 Fluorine group-containing monofunctional attareito toy compound manufactured by Kyoeisha Chemical Industry Co., Ltd.
- IC651 Irgacure 651 (trade name), photo radical polymerization initiator manufactured by Ciba Specialty Chemicals
- IC 184 Irgacure 184 (trade name), photo radical polymerization initiator manufactured by Ciba Specialty Chemicals
- A2074 Photoinitiator No. 2074 (trade name), Rhodia'Japan photopower thione polymerization initiator
- Viscosity The viscosity of liquid fillers adjusted to 25 ° C was measured with an E-type (L type) rotary viscometer at a rotation speed of 5 rpm (mPa ⁇ s unit).
- Refractive index Measured using a digital refractometer RX-5000 manufactured by Atago Co., Ltd. at 25 ° C. using sodium D-line (589 nm).
- Tg Using a DMS manufactured by Seiko Instruments Inc., a 100 ⁇ m-thick test piece was made the peak value of Tan ⁇ using the shear mode.
- Adhesive strength Apply the filler to an alkali glass plate at a thickness of about 20 ⁇ m, combine them, and then irradiate with a UV lamp at an irradiation energy of 50 mWZcm 2 for 60 seconds, then 80 ° CZl Heat-treated for hours. Thereafter, the tensile shear bond strength (NZmm 2 ) of both was measured with a tensile tester.
- Filling time Photonic crystal fiber with a hole diameter of 4. and 1.2 m, with the end face cut perpendicularly, soaked in a filler, whether to fill the hole by capillary action, and filling time up to 10mm was measured. A filling time of 10 seconds or less was evaluated as ⁇ , 60 seconds or less as ⁇ , and 1 hour or more as X.
- Filling situation Filler was filled into photonic crystal fiber and UV cured. The fiber was cut leaving about 2 mm of the filling portion, and the filling state of the cut surface was observed with an optical microscope. The case where there was no peeling and no change in the shape of the filler was evaluated as ⁇ , the case where there was a slight gap at the interface with the pores, ⁇ , the case where it was not cut evenly or was broken, and was evaluated as X. Processing status: After attaching an optical connector to a photonic crystal fiber in which pores were filled with a filler and optically polishing, the state of the filler in the pores on the polished end face was evaluated by observing with an optical microscope. The case where a good flat surface was formed in the pore filling portion was evaluated as ⁇ , and the case where the flat surface was uneven was evaluated as X.
- Abrasion amount The abrasion amount of filler in the hole part of the fiber with respect to the ferrule was measured by interference fringes on the end face (unit: m). The evaluation of the numerical value is ⁇ for +0.1 to 1-05.111, and X for less than -0.05 m.
- Optical Z insertion loss Using photonic crystal fiber with a hole diameter of 9.3 m and using a filler filled in a hole of about 5 mm and complying with 6.1 of JIS C 5961 optical connector test method The insertion method (B) and insertion method (C) were measured (in dB). The acceptance criteria (standard) are 0.5 dB or less for the insertion method (B) and 1. OdB or less for the insertion method (C).
- the filler composition of the present invention has a low viscosity, a low refractive index and an appropriate Tg, and not only has excellent curability, but also has particularly high adhesive strength. It can be seen that it exhibits excellent performance that is well balanced in terms of processing conditions, amount of processing, and optical Z insertion loss.
- Comparative Example 1 which is a composition of acrylic resin has a low Tg, poor heat resistance, and insufficient filling property.
- Comparative Example 3 which is an acrylic resin has a low Tg, poor heat resistance, and insufficient filling properties. In all cases, although the viscosity is low, it cannot be used as a filler.
- the viscosity of a commonly used acrylic adhesive composition is typically about 2500 mPa's, Tg is, for example, about 56 ° C, and the adhesive strength is about the same as the above comparative example.
- the problem was that the viscosity was high.
- the viscosity is lowered, the adhesive strength and the like are lowered, and it has been difficult to ensure a balanced required performance.
- the composition of the present invention satisfies all necessary performances. Industrial applicability
- the filler composition of the present invention can be adjusted to a low refractive index, and the strength also satisfies various performances such as low viscosity, heat resistance, and adhesive strength. It is possible to process the end face of an optical fiber and to provide technologies essential for the construction of large-capacity, long-distance, and high-performance optical communication networks. Very useful.
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Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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US11/666,070 US7477821B2 (en) | 2004-10-25 | 2005-10-06 | Sealing composition and production method of optical fiber having air holes in the inside using the composition |
JP2006542318A JP4243296B2 (ja) | 2004-10-25 | 2005-10-06 | 充填剤組成物及びそれを使用した内部に空孔を有する光ファイバーの製造方法 |
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JP2004310141 | 2004-10-25 | ||
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WO2006046391A1 true WO2006046391A1 (ja) | 2006-05-04 |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007086536A (ja) * | 2005-09-22 | 2007-04-05 | Nagase Chemtex Corp | 充填剤組成物及びそれを使用したホールアシストファイバーの製造方法 |
JP2008292558A (ja) * | 2007-05-22 | 2008-12-04 | Hitachi Cable Ltd | 光ファイバ、光ファイバの接続構造および光コネクタ |
WO2009045339A1 (en) * | 2007-10-01 | 2009-04-09 | Corning Cable Systems Llc | Index-matching gel for nanostructure optical fibers and mechanical splice assembly and connector using same |
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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 |
US20140093690A1 (en) * | 2011-05-31 | 2014-04-03 | Nanoptics, Incorporated | Method and apparatus for lithographic manufacture of multi-component polymeric fiber plates |
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Cited By (4)
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JP2007086536A (ja) * | 2005-09-22 | 2007-04-05 | Nagase Chemtex Corp | 充填剤組成物及びそれを使用したホールアシストファイバーの製造方法 |
JP2008292558A (ja) * | 2007-05-22 | 2008-12-04 | Hitachi Cable Ltd | 光ファイバ、光ファイバの接続構造および光コネクタ |
WO2009045339A1 (en) * | 2007-10-01 | 2009-04-09 | 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 |
Also Published As
Publication number | Publication date |
---|---|
US7477821B2 (en) | 2009-01-13 |
US20080056655A1 (en) | 2008-03-06 |
JPWO2006046391A1 (ja) | 2008-05-22 |
JP4243296B2 (ja) | 2009-03-25 |
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