WO2021049157A1 - 光ファイバ整列方法、光ファイバ融着方法、コネクタ付き光ファイバテープの製造方法及び間欠連結型の光ファイバテープ - Google Patents
光ファイバ整列方法、光ファイバ融着方法、コネクタ付き光ファイバテープの製造方法及び間欠連結型の光ファイバテープ Download PDFInfo
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- WO2021049157A1 WO2021049157A1 PCT/JP2020/027217 JP2020027217W WO2021049157A1 WO 2021049157 A1 WO2021049157 A1 WO 2021049157A1 JP 2020027217 W JP2020027217 W JP 2020027217W WO 2021049157 A1 WO2021049157 A1 WO 2021049157A1
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- optical fiber
- holder
- fiber tape
- region
- optical fibers
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 590
- 238000000034 method Methods 0.000 title claims abstract description 42
- 238000004519 manufacturing process Methods 0.000 title claims description 9
- 239000000835 fiber Substances 0.000 claims abstract description 116
- 238000000576 coating method Methods 0.000 claims description 48
- 239000011248 coating agent Substances 0.000 claims description 43
- 238000007526 fusion splicing Methods 0.000 claims description 16
- 238000007500 overflow downdraw method Methods 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 20
- 239000010410 layer Substances 0.000 description 20
- 239000000463 material Substances 0.000 description 18
- 238000005452 bending Methods 0.000 description 17
- 230000004927 fusion Effects 0.000 description 14
- 239000011247 coating layer Substances 0.000 description 9
- 238000012986 modification Methods 0.000 description 8
- 230000004048 modification Effects 0.000 description 8
- 230000003287 optical effect Effects 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
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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
- G02B6/04—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings formed by bundles of fibres
- G02B6/06—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings formed by bundles of fibres the relative position of the fibres being the same at both ends, e.g. for transporting images
- G02B6/08—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings formed by bundles of fibres the relative position of the fibres being the same at both ends, e.g. for transporting images with fibre bundle in form of plate
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/255—Splicing of light guides, e.g. by fusion or bonding
- G02B6/2555—Alignment or adjustment devices for aligning prior to splicing
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/245—Removing protective coverings of light guides before coupling
-
- 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
- G02B6/25—Preparing the ends of light guides for coupling, e.g. cutting
-
- 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
- G02B6/255—Splicing of light guides, e.g. by fusion or bonding
- G02B6/2551—Splicing of light guides, e.g. by fusion or bonding using thermal methods, e.g. fusion welding by arc discharge, laser beam, plasma torch
-
- 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
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
-
- 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
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/4403—Optical cables with ribbon structure
-
- 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
- G02B6/46—Processes or apparatus adapted for installing or repairing optical fibres or optical cables
Definitions
- the present invention relates to an optical fiber alignment method, an optical fiber fusion method, a method for manufacturing an optical fiber tape with a connector, and an intermittent connection type optical fiber tape.
- Patent Document 1 describes that the outer diameter of an optical fiber is reduced from 250 ⁇ m to 200 ⁇ m, and an optical fiber tape having an outer diameter of 200 ⁇ m is arranged in parallel at a pitch of 250 ⁇ m to form an optical fiber tape. Further, Patent Document 1 describes an intermittently connected optical fiber tape in which a plurality of parallel optical fibers are intermittently connected.
- the 250 ⁇ m pitch optical fiber tapes are collectively fused with a 200 ⁇ m pitch fusion splicer, it is necessary to align the 250 ⁇ m pitch parallel optical fibers at a 200 ⁇ m pitch.
- the ends of the 250 ⁇ m pitch optical fiber tape have been single-core separated, and a plurality of separated single-core separated optical fibers are held in a holder for a 200 ⁇ m pitch.
- the optical fibers were aligned at a pitch of 200 ⁇ m.
- the work of holding a plurality of optical fibers separated into single cores in the holder is inconvenient to handle the optical fibers, and the workability is poor.
- An object of the present invention is to simplify the work of aligning optical fibers.
- the main invention for achieving the above object is to prepare an intermittently connected optical fiber tape provided with a plurality of optical fibers arranged in parallel at a first pitch wider than the fiber diameter, and to provide a non-connected region of the optical fiber tape.
- the width of the optical fiber tape is narrowed inside the holder, and in a state where the plurality of the optical fibers are held in the holder, the plurality of the optical fibers extending from the holder.
- This is an optical fiber alignment method in which a plurality of the optical fibers extending from the holder are aligned at a second pitch narrower than the first pitch by removing the connecting portion for connecting the optical fibers.
- the optical fiber alignment work is simplified.
- FIG. 1A and 1B are explanatory views of the optical fiber tape 1 of the first embodiment.
- FIG. 2A is a cross-sectional view of two optical fibers 2 connected by the connecting portion 11, and is a cross-sectional view of a portion where the connecting portion 11 is formed.
- FIG. 2B is an explanatory view of the connecting portion 11 of the first modification.
- FIG. 2C is an explanatory diagram of the connecting portion 11 of the second modification.
- FIG. 3 is an explanatory diagram of the relationship between the length of the unconnected region 30 of the optical fiber tape 1 and the holder 50.
- FIG. 4 is a flow chart of a process in which the 250 ⁇ m pitch optical fiber tape 1 is collectively fused by the 200 ⁇ m pitch fusion splicing device 40.
- FIG. 5A and 5B are explanatory views of a state in which the unconnected region 30 is sandwiched between the holders 50.
- FIG. 5B is an enlarged view of a cross section taken along the line BB of FIG. 5A.
- FIG. 5C is an explanatory view of the holder 50 of the modified example.
- FIG. 6A is an explanatory diagram of a state in which the coating of the optical fiber 2 is removed by the coating removing device 60.
- FIG. 6B is an explanatory view of the optical fiber tape 1 held in the holder 50 after the coating is removed.
- FIG. 7 is an explanatory diagram of a state at the time of fusion splicing.
- FIG. 8 is a model diagram of the curvature of the Nth fiber.
- FIG. 9A is an explanatory diagram of a modified example of the optical fiber tape 1 of the first embodiment.
- FIG. 9B is an explanatory diagram of how to use the mark 8.
- 10A and 10B are explanatory views of the optical fiber tape 1 of the second embodiment.
- 11A and 11B are explanatory views of the optical fiber tape 1 of the third embodiment.
- FIG. 12 is an explanatory view of a state in which the optical fiber tape 1 of the third embodiment is placed on the holder 50.
- FIG. 13A is an explanatory view showing a state in which the optical fiber tape 1 of the third embodiment is held by the holder 50.
- FIG. 13B is an enlarged view of a cross section of B'-B'in FIG. 13A.
- FIG. 13C is an explanatory view of the optical fiber tape 1 held in the holder 50 after the coating is removed.
- FIG. 14 is an explanatory diagram of the number of connecting portions 11 that can be tolerated in the second connected section 21B.
- 15A and 15B are explanatory views of the optical fiber tape 1 of the fourth embodiment.
- FIG. 16 is an enlarged view of the XX cross section of FIG. 15B.
- FIG. 17 is a flow chart of a manufacturing process of the optical fiber tape 1 with a connector.
- FIG. 18 is an explanatory diagram of the process of S106 of the fifth embodiment.
- an intermittently connected optical fiber tape provided with a plurality of optical fibers arranged in parallel at a first pitch wider than the fiber diameter, and by holding the non-connected region of the optical fiber tape with a holder, the inside of the holder.
- An optical fiber alignment method for aligning a plurality of the optical fibers extending from the holder at a second pitch narrower than the first pitch becomes clear. According to such an optical fiber alignment method, the optical fiber alignment work becomes simple.
- connection portion of the optical fiber tape can be removed and the coatings of the plurality of optical fibers can be removed at the same time, so that the optical fiber alignment work becomes simple.
- a mark is formed in the non-connected region, the optical fiber tape and the holder are aligned based on the position of the mark, and the non-connected region of the optical fiber tape is held by the holder. This facilitates the work of holding the unconnected region of the optical fiber tape in the holder.
- a connecting region is formed by intermittently arranging a plurality of connecting sections in which the connecting portions are arranged intermittently in the width direction of the optical fiber tape in the longitudinal direction, and the connecting section adjacent to the non-connecting region is formed. It is desirable that the number of the connecting portions arranged in is smaller than the number of the connecting portions arranged in the connecting section not adjacent to the non-connecting region. As a result, when the non-connecting region of the optical fiber tape is sandwiched between the holders, the influence of the connecting portion is reduced, so that the width of the optical fiber tape can be easily narrowed.
- a connecting region is formed by intermittently arranging a plurality of connecting sections in which the connecting portions are arranged intermittently in the width direction of the optical fiber tape in the longitudinal direction, and the connecting section adjacent to the non-connecting region is formed. It is desirable that the non-connecting portion is arranged outside the connecting portion arranged in the width direction. As a result, the optical fiber located at the end of the optical fiber tape is easily displaced inward, so that the distance between the optical fibers is easily narrowed inside the holder.
- the region where the holding portion of the holder holds the optical fiber tape is the unconnected region.
- the width of the optical fiber tape can be easily narrowed inside the holder.
- the region where the holding portion of the holder holds the optical fiber tape may include a part of the connecting region provided with the connecting portion.
- the connecting region is longitudinally composed of a plurality of first connecting sections in which the connecting portions are intermittently arranged in the width direction of the optical fiber tape and a second connecting section arranged adjacent to the non-connecting region. It is configured by intermittently arranging in the direction, and the distance between the first connected section and the second connected section in the longitudinal direction is the longitudinal distance between the first connected section and the first connected section.
- the second connecting section is included in the region where the sandwiching portion of the holder sandwiches the optical fiber tape, which is longer than the interval in the direction.
- An optical fiber fusion method in which a holder is set in a fusion splicing device and a plurality of the optical fibers aligned at the second pitch are fused using the fusion splicing device becomes clear. According to such an optical fiber fusion method, the optical fiber alignment work is simplified, so that the fusion work is also simplified.
- a plurality of the optical fibers extending from the holder are aligned at the second pitch narrower than the first pitch, and then the plurality of the optical fibers are held by the holder.
- the ends of the plurality of optical fibers extending from the holder and having the coating removed are cut to a predetermined length, and the plurality of the optical fibers are held in the holder.
- a method for manufacturing an optical fiber tape with a connector is clarified, in which a plurality of the optical fibers aligned at the second pitch are inserted into fiber holes of the ferrule, and the ends of the plurality of the optical fibers are attached to the ferrule. It becomes. According to such a method for manufacturing an optical fiber tape with a connector, the work of arranging the optical fibers is simplified, so that the work of manufacturing the optical fiber tape with a connector is also simplified.
- An intermittently connected optical fiber provided with a plurality of optical fibers arranged in parallel at a pitch wider than the fiber diameter and a plurality of connecting portions for connecting two adjacent optical fibers, and the plurality of the connecting portions are intermittently arranged.
- a plurality of the connecting portions are intermittently arranged to form the connecting portion between the connecting region in which the plurality of optical fibers are intermittently connected and the connecting region and the connecting region.
- An intermittently connected optical fiber tape characterized by having an unconnected region is revealed. According to such an optical fiber tape, the work of arranging a plurality of optical fibers parallel in parallel at a pitch wider than the fiber diameter at a narrow pitch becomes simple.
- a mark used for aligning the optical fiber tape and the holder holding the optical fiber tape is formed in the non-connecting region.
- the optical fiber tape and the holder can be aligned based on the position of the mark, and the non-connected region of the optical fiber tape can be held by the holder.
- the connecting region is configured by intermittently arranging a plurality of connecting sections in which the connecting portions are arranged intermittently in the width direction of the optical fiber tape in the longitudinal direction, and is adjacent to the non-connecting region. It is desirable that the number of the connecting portions arranged in the connecting section is smaller than the number of the connecting portions arranged in the connecting section not adjacent to the non-connecting region. As a result, when the non-connecting region of the optical fiber tape is sandwiched between the holders, the influence of the connecting portion is reduced, so that the width of the optical fiber tape can be easily narrowed.
- the connecting region is formed by intermittently arranging a plurality of connecting sections in which the connecting portions are arranged intermittently in the width direction of the optical fiber tape in the longitudinal direction, and is adjacent to the non-connecting region. It is desirable that the non-connecting portion is arranged outside the connecting portion arranged in the connecting section in the width direction. As a result, the optical fiber located at the end of the optical fiber tape is easily displaced inward, so that the width of the optical fiber tape is easily narrowed inside the holder.
- a plurality of first connecting sections in which the connecting portions are intermittently arranged in the width direction of the optical fiber tape and a second connecting section arranged adjacent to the non-connecting region are arranged in the longitudinal direction. It is configured by intermittently arranging, and the distance between the first connected section and the second connected section in the longitudinal direction is the longitudinal distance between the first connected section and the first connected section. It is desirable that it is longer than the interval.
- the second connected section sandwiched between the holders is arranged so as to be biased toward the non-connected region, so that the distance between the optical fibers not constrained by the connecting portion in the second connected section can be easily narrowed.
- FIG. 1A is an explanatory diagram of a connected region 20 and a non-connected region 30.
- FIG. 1B is an explanatory diagram of the connecting region 20.
- FIG. 1B shows the arrangement of the plurality of connecting portions 11 formed in the connecting region 20.
- each direction is defined as follows.
- the longitudinal direction of the optical fiber tape 1 is simply referred to as the "longitudinal direction".
- the direction parallel to the optical fiber 2 in a state (shown) in which a plurality of optical fibers 2 constituting the optical fiber tape 1 are arranged side by side on a plane so as to be substantially parallel is referred to as a "longitudinal direction”.
- the optical axis direction of the optical fiber 2 constituting the optical fiber tape 1 may be referred to as a "longitudinal direction”.
- the direction in which the plurality of optical fibers 2 are arranged in the illustrated state is referred to as a "width direction”.
- the direction perpendicular to the tape surface of the optical fiber tape 1 in the illustrated state is referred to as a "tape thickness direction”.
- the optical fiber tape 1 of the present embodiment is a so-called intermittently connected type (intermittently fixed type) optical fiber tape.
- the intermittently connected optical fiber tape 1 is an optical fiber tape in which a plurality of optical fibers 2 are connected in parallel and intermittently connected.
- the two adjacent optical fibers 2 are connected by a connecting portion 11.
- a plurality of connecting portions 11 for connecting the two adjacent optical fibers 2 are intermittently arranged in the longitudinal direction.
- the plurality of connecting portions 11 of the optical fiber tape 1 are arranged two-dimensionally intermittently in the longitudinal direction and the width direction.
- the connecting portion 11 is formed by applying an ultraviolet curable resin as an adhesive (tape material) and then irradiating with ultraviolet rays to solidify the connecting portion 11.
- the connecting portion 11 can also be made of a thermoplastic resin.
- the region other than the connecting portion 11 between the two adjacent optical fibers 2 is the non-connecting portion 13 (separated portion).
- the non-connecting portion 13 is arranged in the width direction of the connecting portion 11.
- the optical fiber tape 1 can be rolled into a tubular shape (bundle shape) or folded, and a large number of optical fibers 2 can be accommodated at a high density.
- the intermittently connected optical fiber tape 1 is not limited to the configuration shown in FIG. 1A.
- the number of cores of the optical fiber tape 1 (the number of optical fibers 2) may be changed.
- the arrangement of the connecting portion 11 may be changed within a range that does not deviate from the gist of the present application.
- a plurality of optical fibers 2 are arranged in parallel at intervals wider than the outer diameter of the optical fibers 2.
- the outer diameter (fiber diameter D) of the optical fiber 2 is 200 ⁇ m
- the interval in the width direction of the optical fiber 2 (first fiber pitch Pf1) is 250 ⁇ m.
- the outer diameter of the optical fiber 2 may be referred to as "fiber diameter D”.
- the interval in the width direction of the optical fiber 2 in the optical fiber tape 1 may be referred to as "first fiber pitch Pf1".
- the fiber diameter D is not limited to 200 ⁇ m, but may be 220 ⁇ m or less.
- the first fiber pitch Pf1 is not limited to 250 ⁇ m, but is 250 ⁇ 30 ⁇ m (within the range of 220 ⁇ m to 280 ⁇ m), and may be an interval at which a gap is formed between the two adjacent optical fibers 2. Just do it.
- the intermittently connected optical fiber tape 1 is provided with a connected region 20 and a non-connected region 30.
- the connecting region 20 is a region in which a plurality of connecting portions 11 are formed so as to connect all the optical fibers 2 (here, 12 optical fibers 2).
- the non-connected region 30 is a region between the connected region 20 and the connected region 20 without a connecting portion 11.
- the connected region 20 and the non-connected region 30 are formed alternately in the longitudinal direction.
- the unconnected region 30 is formed between the connected region 20 and the connected region 20, and the connected region 20 is formed between the unconnected region 30 and the unconnected region 30.
- the connecting regions 20 are repeatedly arranged at predetermined intervals P1 in the longitudinal direction. In the following description, the distance between the connecting regions 20 in the longitudinal direction may be referred to as "region pitch P1".
- a plurality of connected sections 21 are provided in the connected region 20.
- two connected sections 21 are provided in one connected area 20.
- 5 to 6 connecting portions 11 are formed intermittently in the width direction.
- the connected portion 11 and the non-connected portion 13 are alternately formed in the width direction.
- the positions of the connecting portions 11 in the respective connected sections 21 are different from each other.
- the plurality of connecting portions 11 in each connecting section 21 are arranged alternately in the width direction.
- the two adjacent optical fibers 2 are connected by at least one connecting portion 11 of the connecting region 20, and all the optical fibers 2 are intermittently connected by the plurality of connecting portions 11 belonging to one connecting region 20. Is connected to.
- i is not limited to 2
- i may be 3 or more (described later).
- j is not limited to 5 to 6, and may be another number (described later).
- a non-connected section 23 in which the connecting portion 11 does not exist in the width direction is provided between the connected section 21 and the connected section 21, a non-connected section 23 in which the connecting portion 11 does not exist in the width direction is provided.
- a plurality of (here, two) connecting sections 21 in the connecting region 20 are arranged at predetermined intervals P2 in the longitudinal direction.
- the interval in the longitudinal direction of the connected section 21 in the connected area 20 may be referred to as “section pitch P2”. Since the section pitch P2 is longer than the dimension in the longitudinal direction of the connecting portion 11, the unconnected section 23 is formed between the connected section 21 and the connected section 21.
- the length of the non-connected region 30 in the longitudinal direction is set longer than the section pitch P2.
- FIG. 2A is a cross-sectional view of two optical fibers 2 connected by the connecting portion 11, and is a cross-sectional view of a portion where the connecting portion 11 is formed.
- the optical fiber 2 has an optical fiber bare wire 4, a coating layer 5, and a colored layer 6.
- the optical fiber bare wire 4 is composed of a core and a clad.
- the coating layer 5 is a layer that covers the optical fiber bare wire 4.
- the coating layer 5 is composed of, for example, a primary coating layer (primary coat) and a secondary coating layer (secondary coat).
- the colored layer 6 is a layer formed on the surface of the coating layer 5.
- the colored layer 6 is formed by applying a colorant to the surface of the coating layer 5.
- the two adjacent optical fibers 2 are connected by a taped material (ultraviolet curable resin; connecting agent) constituting the connecting portion 11.
- a taped material layer 15 made of a taped material is formed on the entire circumference of the colored layer 6. Further, a taped material layer 15 made of a taped material is formed on the surface of the colored layer 6 over the entire area in the longitudinal direction of the optical fiber 2.
- the connecting portion 11 has a concave shape at an intermediate portion between the two optical fibers 2.
- FIG. 2B is an explanatory view of the connecting portion 11 of the first modification. As shown in the first modification, the connecting portion 11 does not have to be recessed in the intermediate portion between the two optical fibers 2.
- FIG. 2C is an explanatory diagram of the connecting portion 11 of the second modification. As shown in the second modification, the taped material layer 15 made of the taped material may not be formed on the entire circumference of the colored layer 6. According to the second modification, the diameter of the optical fiber 2 can be further reduced.
- the connecting portion 11 (or the taped material layer 15) is formed on both the upper side and the lower side of the line connecting the centers of the two adjacent optical fibers 2, and the two adjacent optical fibers
- the connecting portion 11 (or the taped material layer 15) may be formed only on one side of the upper side or the lower side of the line connecting the centers of 2. Further, the connecting portion 11 (or the taped material layer 15) may not be formed evenly on the upper and lower sides of the line connecting the centers of the two adjacent optical fibers 2.
- FIG. 3 is an explanatory diagram of the relationship between the length of the non-connecting region 30 of the optical fiber tape 1 and the holder 50.
- the holder 50 is a member that holds the optical fiber tape 1.
- the holder 50 has a base portion 51 and a lid portion 52.
- the base portion 51 is a member on which the optical fiber tape 1 is placed, and has a mounting surface 51A on which the optical fiber tape 1 is placed.
- a V-groove (see FIG. 5B) for aligning the optical fibers 2 at a predetermined pitch is formed on the mounting surface 51A.
- the lid portion 52 is a member that can be opened and closed with respect to the base portion 51.
- the optical fiber tape 1 is sandwiched (held) between the mounting surface 51A of the base portion 51 and the lid portion 52. Therefore, the mounting surface 51A of the base portion 51 and the lid portion 52 form a sandwiching portion for sandwiching the optical fiber tape 1.
- the longitudinal length Lh of the sandwiching portion is defined by the width (longitudinal dimension) of the lid portion 52.
- the length Lh in the longitudinal direction of the holding portion is not the width (dimension in the longitudinal direction) of the lid portion 52, but the length Lh in the longitudinal direction. It will be defined by the width of the pad (dimension in the longitudinal direction).
- the optical fiber 2 extends from both sides of the holder 50 (or the holding portion).
- the side on which the optical fiber 2 on the side to be processed later the side for removing or cutting the coating: the tip side of the optical fiber 2 extends. Is sometimes called the "processing side", and the opposite side is sometimes called the "base end side”.
- the length of the non-connecting region 30 of the optical fiber tape 1 is set to be longer than the width Lh (dimension in the longitudinal direction) of the sandwiching portion. Therefore, in the present embodiment, the sandwiching portion can sandwich the non-connecting region 30 of the optical fiber tape 1 (the holder 50 does not sandwich the region formed by the connecting portion 11 in the sandwiching portion). It is a configuration that can hold the optical fiber tape 1). As a result, as will be described later, when the optical fiber tape 1 is held by the holder 50, the gaps between the plurality of optical fibers 2 inside the holder 50 (holding portion) can be easily narrowed as compared with the first fiber pitch Pf1. The width of the optical fiber tape 1 can be easily narrowed (see FIG. 5B).
- the non-connecting region 30 of the optical fiber tape 1 extends from both sides of the sandwiching portion (see also FIG. 5A). ..
- the sandwiching portion sandwiches the non-connecting region 30 of the optical fiber tape 1
- the length of the non-connecting region 30 extending from the base end side (left side of FIG. 3 (or FIG. 5A)) of the sandwiching portion in the longitudinal direction.
- L1 be, and let L2 be the length of the unconnected region 30 extending from the processed side (right side in the drawing) of the holder 50 in the longitudinal direction.
- the length L1 is set so that the bending radius of the optical fiber 2 becomes longer than the allowable bending radius R when the holder 50 holds the optical fiber 2.
- the length L1 is preferably 9.42 mm or more.
- the length L2 is such that the pair of blades 61A of the coating removing device 60 can sandwich the portion of the non-connecting region 30.
- the length L2 is preferably 2 mm or more. Therefore, the length of the non-connecting region 30 of the optical fiber tape 1 is preferably longer than the length (Lh + L1 + L2) obtained by adding the length L1 and the length L2 to the width Lh of the sandwiching portion, and specifically, the length. It is desirable that the length is longer than the length (Lh + 11.42 mm) obtained by adding 11.42 mm to Lh.
- FIG. 4 is a flow chart of a process in which an optical fiber tape 1 in which optical fibers 2 having a fiber diameter of 200 ⁇ m are connected in parallel at a pitch of 250 ⁇ m and intermittently connected is collectively fused by a fusion splicer 40 for a pitch of 200 ⁇ m. ..
- a processing flow (S001 to S004) in which optical fibers 2 constituting an optical fiber tape 1 in which optical fibers 2 having a fiber diameter of 200 ⁇ m are connected in parallel at a pitch of 250 ⁇ m are aligned at a pitch of 200 ⁇ m. Is also included.
- the interval in the width direction of the optical fibers 2 for batch fusion in the fusion splicer 40 may be referred to as "second fiber pitch Pf2".
- the second fiber pitch Pf2 may be narrower than the first fiber pitch Pf1 and is not limited to 200 ⁇ m.
- the operator prepares a 250 ⁇ m pitch optical fiber tape 1 to be fused and connected and a holder 50 for a 200 ⁇ m pitch (S001).
- the operator prepares the optical fiber tape 1 having the first fiber pitch Pf1 and the holder 50 for the second fiber pitch Pf2.
- the operator prepares the optical fiber tape 1 shown in FIG. 1A as the optical fiber tape 1 having a pitch of 250 ⁇ m.
- the holder 50 for a 200 ⁇ m pitch is a holder for setting the optical fiber tape 1 in the fusion splicer 40 for a 200 ⁇ m pitch.
- a plurality of V-grooves are formed on the mounting surface 51A of the base portion 51 of the holder 50 of the present embodiment at a pitch of 200 ⁇ m (second fiber pitch Pf2).
- the operator places the non-connecting region 30 of the optical fiber tape 1 on the mounting surface 51A of the holder 50 (S002).
- the length of the non-connecting region 30 of the optical fiber tape 1 is set to be longer than the width Lh of the lid portion 52, and the operator is not in the optical fiber tape 1.
- the non-connecting region 30 of the optical fiber tape 1 is placed on the mounting surface 51A of the holder 50 so that the connecting region 30 faces the lid portion 52.
- the end portion (the portion on the right side in the drawing) of the optical fiber 2 extends outside the holder 50 (the right side in the drawing). It will be in the out state.
- a part of the non-connecting region 30 is outside the holder 50. It will be in a state of extending to (right side in the figure).
- the operator closes the lid 52 and causes the holder 50 to hold the optical fiber tape 1 (S003). Since the non-connecting region 30 of the optical fiber tape 1 is placed on the mounting surface 51A of the holder 50 so as to face the lid 52 in S002, when the lid 52 is closed in S003, the optical fiber tape 1 The unconnected region 30 is sandwiched between the mounting surface 51A of the base portion 51 and the lid portion 52. If necessary, the operator holds the optical fiber tape 1 while narrowing the non-connecting region 30 of the optical fiber tape 1 with a finger in the width direction (while narrowing the distance between the plurality of optical fibers 2 in the non-connecting region 30). It may be held at 50.
- FIG. 5A and 5B are explanatory views of a state in which the unconnected region 30 is sandwiched between the holders 50.
- FIG. 5B is an enlarged view of a cross section taken along the line BB of FIG. 5A.
- the connecting portion 11 is not formed in the non-connecting region 30 of the optical fiber tape 1, there is a non-connecting portion 13 (separation portion) between the respective optical fibers 2, and the optical fiber 2 is formed in the non-connecting region 30. They are not restrained from each other. Therefore, when the unconnected region 30 is sandwiched between the holders 50, the distance between the plurality of optical fibers 2 in the unconnected region 30 is narrowed according to the pitch of the V groove of the mounting surface 51A (second fiber pitch Pf2). Become.
- FIG. 5C is an explanatory view of the holder 50 of the modified example.
- a pair of stepped portions is formed on the mounting surface 51A of the holder 50 of the modified example, and the distance between the optical fibers 2 at both ends in the width direction is defined by the pair of stepped portions, whereby a plurality of lights are used.
- Fibers 2 are aligned at a pitch of 200 ⁇ m.
- the mounting surface 51A of the holder 50 for the 200 ⁇ m pitch is not limited to the one having the V groove of the 200 ⁇ m pitch, and may have other shapes. In other words, when the unconnected region 30 of the optical fiber tape 1 is held in the holder 50, it suffices that the gaps between the plurality of optical fibers 2 can be narrowed inside the holder 50 to narrow the width of the optical fiber tape 1.
- the optical fibers 2 extend from both sides of the sandwiched portion.
- a part of the non-connecting region 30 extends outward from the sandwiched portion.
- the non-connecting region 30 extends by the length L1 from the base end side of the holding portion, and the non-connecting region 30 extends by the length L2 from the processing side of the holder 50.
- a connecting portion 11 exists between the optical fibers 2 outside the lid portion 52 of the holder 50 (outside the sandwiching portion), and the optical fiber 2 is present at the connecting portion 11.
- the distance between them is restricted to 250 ⁇ m. Therefore, at the stage of S003, since the plurality of optical fibers 2 outside the lid portion 52 of the holder 50 (outside the holding portion) are affected by the connecting portion 11, they are arranged at substantially the first fiber pitch Pf1. There is.
- FIG. 6A is an explanatory diagram of a state in which the coating of the optical fiber 2 is removed by the coating removing device 60.
- the coating removing device 60 is a device that removes the coating of a plurality of optical fibers 2 constituting the optical fiber tape 1.
- the coating removing device 60 is a so-called hot jacket stripper.
- the coating removing device 60 has a main body portion 61 having a pair of blades 61A, and a gripping portion 62 for gripping the holder 50.
- the operator sets the holder 50 holding the optical fiber tape 1 on the grip portion 62 of the coating removing device 60, sandwiches the optical fiber 2 (optical fiber tape 1) with the pair of blades 61A of the main body portion 61, and the optical fiber 2 After making a notch in the coating of the optical fiber, the coating of the optical fiber 2 is pulled out by the pair of blades 61A by separating the main body portion 61 and the grip portion 62, thereby removing the coating of the optical fiber 2.
- a part of the non-connecting region 30 extends outward from the holder 50 (the right side in the drawing: the processing side), and the pair of blades 61A
- the optical fiber 2 (optical fiber tape 1) is sandwiched at the portion of the non-connecting region 30, and the coating of the optical fiber 2 on the end side of the sandwiched portion is removed.
- the connecting portion 11 exists between the plurality of optical fibers 2 extending from the holder 50 (see FIG. 5A). Since the connecting portion 11 is arranged outside the coating layer 5 of the optical fiber 2 (see FIG. 2A), when the coating of the optical fiber 2 is removed by the coating removing device 60, the optical fiber tape is combined with the coating of the optical fiber 2. The connecting portion 11 (tape material layer 15) of 1 is also removed. That is, when the coating of the optical fiber 2 is removed by the coating removing device 60, the plurality of optical fibers 2 (optical fiber bare wires 4) are single-core separated.
- FIG. 6B is an explanatory view of the optical fiber tape 1 held in the holder 50 after the coating is removed.
- a plurality of optical fibers 2 extend from the processing side (right side in the figure) of the holder 50.
- the removal of the connecting portion 11 eliminates the restraint of the optical fiber 2 by the connecting portion 11.
- the influence of the connecting portion 11 disappears on the processed side (right side in the drawing) of the holder 50, so that the distance between the plurality of optical fibers 2 (optical fiber bare wire 4) follows the pitch of the V groove of the mounting surface 51A.
- the optical fiber 2 (optical fiber bare wire 4) is aligned at the second fiber pitch Pf2 by removing the coating of the optical fiber 2 in S004 (note that the optical fiber bare wire 4) is aligned at the second fiber pitch Pf2.
- the optical fiber 2 is aligned at the first fiber pitch Pf1 on the base end side (left side in the drawing) of the holder 50 because it is affected by the connecting portion 11).
- the connecting portion 11 of the optical fiber tape is removed by removing the coatings of the plurality of optical fibers 2 extending from the processed side (right side in the drawing) of the holder 50, whereby the holder 50 A plurality of optical fibers on the processing side (right side in the drawing) are aligned at a second fiber pitch Pf2.
- the connecting portion 11 of the optical fiber tape 1 extending from the processed side (right side in the drawing) of the holder 50 is removed, the processed side of the holder 50 (in the figure).
- the plurality of optical fibers 2 extending from the right side) are separated from each other in a single core, and the plurality of optical fibers can be aligned at the second fiber pitch Pf2.
- the coating removing device 60 is used as in the present embodiment, the connection portion 11 of the optical fiber tape 1 can be removed and the coatings of the plurality of optical fibers 2 can be removed at the same time. Alignment work becomes easy.
- the length from the end of the holder 50 on the processed side to the edge of the coating is 2 mm.
- the pair of blades 61A of the coating removing device 60 sandwiches the portion of the non-connecting region 30 and corresponds to the portion where the coating is cut.
- the above-mentioned length L2 (see FIG. 5A: the longitudinal length of the unconnected region 30 extending from the processed side of the holder 50) is stripped from the end of the holder 50 on the processed side. It is desirable that the length is longer than the length to the edge (the portion where the pair of blades 61A of the coating removing device 60 makes a cut in the coating). That is, it is desirable that the length L2 is 2 mm or more.
- the operator cuts the end portion of the optical fiber 2 so that the bare optical fiber wire 4 has a predetermined length (S005). Normally, the holder 50 holding the optical fiber tape 1 is set in the fiber cutter, and the end portion of the optical fiber 2 is cut by using the fiber cutter.
- the operator makes a fusion splicing of a plurality of optical fibers 2 using the fusion splicing device 40 (S006).
- the operator sets the holder 50 holding the optical fiber tape 1 in the fusion splicing device 40, and uses the fusion splicing device 40 to fuse and connect the optical fibers 2 of the optical fiber tape 1.
- FIG. 7 is an explanatory diagram of the state at the time of fusion splicing.
- the fusion splicer 40 has an electrode portion 41 and a pair of holder set portions 42.
- the electrode portion 41 has a pair of electrodes for fusion-bonding the optical fibers 2.
- An arc discharge is generated in the electrode portion 41 to heat the tip portion of the optical fiber 2, and the tip portion of the optical fiber 2 is melted, so that the optical fibers 2 are fused and connected to each other.
- the holder set portion 42 is a portion (holder mounting portion) for setting the holder 50.
- the holder set portion 42 is configured to be movable in order to align the optical fibers 2 with each other at the time of fusion splicing.
- the operator sets the holder 50 in the holder set portion 42 in a state where the plurality of optical fibers 2 are held in the holder 50.
- the holders 50 are set in the pair of holder set portions 42, the end faces of the optical fibers 2 (optical fiber bare wires 4) extending from the processed side of the holder 50 are arranged to face each other in the electrode portion 41.
- the fusion splicer 40 of the present embodiment is a fusion splicer 40 for a 200 ⁇ pitch, and is configured to collectively fuse a plurality of optical fibers 2 aligned at a 200 ⁇ pitch.
- the optical fibers 2 (optical fiber bare wire 4) are aligned at the second fiber pitch Pf2. Therefore, the optical fiber tape 1 having a pitch of 250 ⁇ m can be collectively fused by the fusion splicing device 40 for a pitch of 200 ⁇ m.
- ⁇ About length L1> As shown in FIG. 5A, when the holder 50 sandwiches the unconnected region 30 of the optical fiber tape 1, a plurality of optical fibers 2 are arranged at the first fiber pitch Pf1 on the outside of the holder 50 (outside the sandwiched portion). On the other hand, inside the holder 50 (inside the sandwiching portion), the plurality of optical fibers 2 are arranged at a second fiber pitch Pf2. Therefore, when the holder 50 sandwiches the non-connecting region 30 of the optical fiber tape 1, the optical fiber 2 is curved in the vicinity of both ends of the holder 50 (holding portion).
- the bending radius of the optical fiber 2 is equal to or larger than the allowable bending radius.
- the curvature of the optical fiber 2 located at the end in the case of the N-core optical fiber tape 1, the first fiber or the Nth fiber
- the bending radius of the optical fiber 2 located at the end is equal to or larger than the allowable bending radius.
- the minimum value L0 of the length L1 required for the bending radius of the optical fiber to be allowed will be described.
- FIG. 8 is a model diagram of the curvature of the Nth fiber.
- the curved solid line in the figure indicates the center of the Nth fiber.
- the optical fiber 2 is curved from the position of the connecting portion 11 closest to the holding portion of the holder 50 to the end (end on the base end side) of the holding portion of the holder 50 (see FIG. 5A).
- Point A in FIG. 8 indicates the center position of the Nth fiber at the position in the longitudinal direction of the connecting portion 11 closest to the holding portion of the holder 50.
- the plurality of optical fibers 2 are arranged in parallel at the first fiber pitch Pf1.
- Point B in FIG. 8 indicates the center position of the Nth fiber at the end of the holding portion of the holder 50.
- the plurality of optical fibers 2 are arranged in parallel at the second fiber pitch Pf2.
- the optical fiber 2 is curved in an S shape.
- the point C is the center of the S-shaped curved portion.
- the optical fiber 2 is curved with an allowable bending radius R so that the upper side in the drawing is convex between A and C.
- Point O1 is the bending center of the optical fiber 2 curved between A and C. The point O1 is located at the position in the longitudinal direction of the connecting portion 11 closest to the holding portion of the holder 50.
- the optical fiber 2 is curved with an allowable bending radius R with the lower side in the drawing convex.
- the point O2 is the bending center of the optical fiber 2 curved between CB.
- Point O2 is located at the end of the holding portion of the holder 50.
- the intersection of the extension line of the center line of the Nth fiber when paralleled at the second fiber pitch Pf2 and the line connecting the point A and the point O1 is defined as the point D.
- the intersection of the extension line of the center line of the Nth fiber when paralleled at the second fiber pitch Pf2 and the line connecting the points O2 and O1 is defined as the point E.
- the length between O1 and D is y
- the length between O1 and E is x.
- Ls (Pf1-Pf2) ⁇ (N-1) / 2
- the first fiber pitch Pf1 and the second fiber pitch Pf2 in the above equation are known values. Further, N in the above equation is a known value because it is the number of cores of the optical fiber tape 1 (the number of optical fibers 2). Therefore, the shift amount Ls can be calculated by the above equation.
- the length y corresponds to the value obtained by subtracting the allowable bending radius R from the shift amount Ls (see FIG. 8).
- the length L0 required for the bending radius of the optical fiber 2 to be longer than the allowable bending radius R when the holder 50 holds the optical fiber 2 corresponds to the lengths DB in the figure. Can be indicated by, and can be calculated from R and x.
- the length of the non-connecting region 30 extending from the base end side (left side of FIG. 5A) of the sandwiching portion in the longitudinal direction. Is L1, and in order to set the length L1 so that the bending radius of the optical fiber 2 becomes longer than the allowable bending radius R when the holder 50 holds the optical fiber 2, the length L1 is longer than the length L0. Is desirable. Therefore, in the case of this embodiment, it is desirable that L1 is 9.42 mm or more.
- FIG. 9A is an explanatory diagram of a modified example of the optical fiber tape 1 of the first embodiment.
- the optical fiber tape 1 of the modified example shown in FIG. 9A is different from the optical fiber tape 1 shown in FIG. 1A in that it has a mark 8.
- the mark 8 is a mark formed in the unconnected region 30.
- the mark 8 is a mark indicating the position of the unconnected region 30.
- the mark 8 serves as a mark for aligning the optical fiber tape 1 and the holder 50.
- the marks 8 are formed in a band shape over the width direction of the optical fiber tape 1 by being formed at the same positions in the longitudinal direction of the plurality of optical fibers 2.
- the mark 8 may also serve as an identification function of the optical fiber tape 1.
- the mark 8 of the optical fiber tape 1 in the drawing is formed in a pattern indicating that it is the second tape, and has an identification function of the optical fiber tape 1.
- the mark 8 of the present embodiment is formed over the entire width direction of the optical fiber tape 1 by being formed on all the optical fibers 2 constituting the optical fiber tape 1.
- the mark 8 may be formed on a part of the optical fibers 2 among the plurality of optical fibers 2 constituting the optical fiber tape 1.
- the optical fiber 2 (No. 1 fiber or No. N) at least at the end in the width direction is used to facilitate the alignment with the holder 50. It is desirable that the mark 8 is formed on the fiber).
- FIG. 9B is an explanatory diagram of how to use the mark 8.
- An alignment mark (not shown) for aligning with the mark 8 of the optical fiber tape 1 may be formed on the mounting surface 51A of the holder 50. This facilitates the work of aligning the optical fiber tape 1 and the holder 50 based on the mark 8.
- the base end of the holding portion is held.
- a non-connecting region 30 having a predetermined length extends from the side, and a non-connecting region 30 having a predetermined length (length L2 described above) extends from the processing side of the holder 50.
- an intermittently connected optical fiber tape provided with a plurality of optical fibers 2 parallel to each other at a first fiber pitch Pf1 wider than the fiber diameter D. (S001 in FIG. 4), and the unconnected region 30 of the optical fiber tape 1 is held by the holder 50 to narrow the width of the optical fiber tape 1 inside the holder 50 (S003 in FIG. 4, FIG. See 5B). Then, in the present embodiment, by removing the connecting portion 11 of the optical fiber tape 1 extending from the holder 50, a plurality of optical fibers 2 (optical fiber bare wires 4) separated by a single core are separated by a second fiber pitch Pf2.
- the connecting portion 11 is left without separating the optical fiber 2 into pieces at the end portion (end portion on the processing side) of the optical fiber tape 1.
- a plurality of optical fibers 2 are connected to each other (see FIGS. 3 and 5A). Therefore, in the present embodiment, the handling of the plurality of optical fibers 2 is simplified as compared with the work of holding the plurality of optical fibers separated into single cores in the holder, and the plurality of optical fibers 2 are used in the holder 50. Workability to hold is improved. As a result, in the present embodiment, the alignment work of the optical fiber 2 becomes simple. Further, in the present embodiment, since the alignment work of the optical fibers 2 is simplified, the fusion work is also simplified.
- the above-mentioned optical fiber tape 1 includes a plurality of optical fibers arranged in parallel at a first fiber pitch Pf1 wider than the fiber diameter D, and a plurality of connecting portions 11, and the plurality of connecting portions 11 are intermittently arranged. It is an intermittently connected optical fiber tape.
- the intermittently connected optical fiber tape 1 of the present embodiment is connected to a connecting region 20 in which a plurality of connecting portions 11 are intermittently arranged and a plurality of optical fibers (N optical fibers) are intermittently connected. It has an unconnected region 30 in which a connecting portion 11 is not formed between the regions 20. According to such an intermittently connected optical fiber tape 1, the holder 50 for the second fiber pitch Pf2 holds the non-connected region 30 (see S003 and FIG.
- FIG. 10A and 10B are explanatory views of the optical fiber tape 1 of the second embodiment.
- FIG. 10B shows the arrangement of the plurality of connecting portions 11 formed in the connecting region 20 of the optical fiber tape 1 of the second embodiment.
- the optical fiber tape 1 of the second embodiment is also an intermittently connected optical fiber tape 1. Further, the optical fiber tape 1 of the second embodiment is also provided with a connecting region 20 and a non-connecting region 30. As shown in FIG. 10B, a plurality of connected sections 21 are also provided in the connected region 20 of the second embodiment. In the second embodiment, the number i of the connected sections 21 of one connected area 20 is increased as compared with the first embodiment, and four connected sections 21 are provided in one connected area 20. On the other hand, in the second embodiment, the number of connecting portions 11 in one connected section 21 is reduced as compared with the first embodiment, and the number j of the connecting portions 11 in one connected section 21 is 2 to 3.
- each connected section 21 three non-connected portions 13 are arranged between the connected portion 11 and the connected portion 11.
- the positions of the connecting portions 11 in the respective connected sections 21 are different from each other.
- the plurality of connecting portions 11 in each connecting section 21 are arranged alternately in the width direction.
- the two adjacent optical fibers 2 are connected by at least one connecting portion 11 of the connecting region 20, and all the optical fibers 2 are intermittently connected by the plurality of connecting portions 11 belonging to one connecting region 20. Is connected to.
- the number of connected portions 11 (here, 2) arranged in the connected section 21 (the rightmost connected section 21 in FIG. 10B) adjacent to the unconnected region 30 is adjacent to the unconnected region 30. It is less than the number of connected portions 11 (here, 3) arranged in the connected section 21 (for example, the second connected section 21 from the right in FIG. 10B).
- the width direction is outside (upper or lower in FIG. 10B) of the connecting portion 11 arranged in the connected section 21 (the rightmost connected section 21 in FIG. 10B) adjacent to the non-connected region 30.
- a non-connecting portion 13 is arranged (here, three non-connecting portions 13 are arranged).
- the sandwiching portion of the holder 50 sandwiches the non-connecting region 30 of the optical fiber tape 1 (the optical fiber tape is held in the holder 50 without sandwiching the region formed by the connecting portion 11 in the sandwiching portion. I was holding 1). However, the sandwiching portion of the holder 50 may sandwich a part of the connecting region 20 of the optical fiber tape 1.
- FIG. 11A and 11B are explanatory views of the optical fiber tape 1 of the third embodiment.
- FIG. 11B shows the arrangement of the plurality of connecting portions 11 formed in the connecting region 20 of the optical fiber tape 1 of the third embodiment.
- one connected area 20 is provided with three connected sections 21 (that is, i is 3).
- the two connected sections 21 on the left of the three connected sections 21 in the figure are referred to as the first connected section 21A, and the connected section 21 on the right side in the figure is referred to as the second connected section 21B. May be called.
- the second connected section 21B is a connected section 21 arranged adjacent to the non-connected area 30.
- the second connected section 21B is a connected section 21 arranged on the side of the sandwiched portion as compared with the first connected section 21A when the optical fiber tape 1 is sandwiched by the holder 50.
- a non-connected section 23 in which the connecting portion 11 does not exist in the width direction is provided between the connected section 21 and the connected section 21.
- the unconnected section 23 between the two first connected sections 21A may be referred to as the first unconnected section 23A.
- the unconnected section 23 between the first connected section 21A and the second connected section 21B may be referred to as a second unconnected section 23B.
- the length of the second unconnected section 23B in the longitudinal direction is longer than the length of the first unconnected section 23A in the longitudinal direction.
- the longitudinal distance between the first connected section 21A and the second connected section 21B (section pitch P2'in the figure)' is the longitudinal distance between the first connected section 21A and the first connected section 21A ( It is longer than the section pitch P2) in the figure. Therefore, the second connected section 21B (the rightmost connected section 21 in FIG. 11B) arranged adjacent to the non-connected area 30 is arranged so as to be biased from the first connected section 21A toward the non-connected area 30. Has been done.
- FIG. 12 is an explanatory view of a state in which the optical fiber tape 1 of the third embodiment is placed on the holder 50.
- FIG. 13A is an explanatory view showing a state in which the optical fiber tape 1 of the third embodiment is held by the holder 50.
- FIG. 13B is an enlarged view of a cross section of B'-B'in FIG. 13A.
- the holder 50 is sandwiched.
- the second connected section 21B may be included in the region sandwiched between the portions (here, the mounting surface 51A of the base portion 51 and the lid portion 52).
- the connecting portion 11 may be included in the region sandwiched by the sandwiching portion (here, the mounting surface 51A and the lid portion 52 of the base portion 51) of the holder 50.
- the non-connecting region 30 of the optical fiber tape 1 is placed on the mounting surface 51A of the holder 50 so as to face the lid 52 (see FIG. 12), the lid of the holder 50 When the 52 is closed, the non-connecting region 30 of the optical fiber tape 1 is sandwiched between the mounting surface 51A of the base portion 51 and the lid portion 52. Since the optical fibers 2 are not constrained in the unconnected region 30, even in the third embodiment, when the unconnected region 30 is sandwiched between the holders 50, the distance between the plurality of optical fibers 2 in the unconnected region 30 is increased. It narrows according to the pitch of the V-groove of the mounting surface 51A (second fiber pitch Pf2).
- the second connected section 21B sandwiched between the holders 50 is arranged so as to be biased toward the non-connected region 30, the light that is not constrained by the connecting portion 11 in the second connected section 21B.
- the distance between the fibers 2 is more likely to be narrower than that of the first fiber pitch Pf1.
- the width direction dimension of the optical fiber tape 1 in the second connected section 21B is narrower than that before being held by the holder 50.
- FIG. 13C is an explanatory view of the optical fiber tape 1 held in the holder 50 after the coating is removed.
- the connecting portion 11 when the connecting portion 11 is removed on the processed side (right side in the drawing) of the holder 50, the restraint of the optical fiber 2 by the connecting portion 11 is removed, and a plurality of optical fibers 2 (optical fiber bare wires) are removed.
- FIG. 14 is an explanatory diagram of the number of connecting portions 11 that can be tolerated in the second connected section 21B.
- a plurality of optical fibers 2 in the second connected section 21B are shown.
- the operator holds the optical fiber tape 1 in the holder 50 while narrowing the second connected section 21B of the optical fiber tape 1 with a finger in the width direction. Therefore, the optical fiber tape 1 in the drawing is narrowed in the width direction.
- the non-connecting portion 13 two adjacent optical fibers 2 are in contact with each other.
- the connecting portion 11 since the two adjacent optical fibers 2 are restrained by the connecting portion 11, they are separated by the amount (width C) of the connecting portion 11.
- a V groove formed on the mounting surface 51A of the holder 50 is shown.
- the operator aligns the optical fiber 2 (here, the first fiber) at one end of the optical fiber tape 1 with the V-groove, and then connects the plurality of optical fibers 2 in the second connected section 21B.
- the other optical fibers 2 are aligned with the V-grooves while narrowing the interval. Therefore, the center position of the V-groove (V-groove for the first fiber) at the left end in the drawing is shown so as to match the position of the optical fiber 2 (No. 1 fiber) at the left end in the drawing.
- the center position of the optical fiber 2 at the other end (Nth fiber at the right end in the figure). Is outside the V-groove, and the optical fiber 2 may not be arranged in the V-groove. Therefore, when the distance between the plurality of optical fibers 2 in the second connected section 21B is narrowed, the center position of the optical fiber 2 (here, the Nth fiber) at the other end of the optical fiber tape 1 is the Nth fiber. It is desirable to be located above the V-groove for light.
- the distance between the centers of the optical fibers 2 (No. 1 fiber and No. N fiber) at both ends when the distance between the plurality of optical fibers 2 in the second connected section 21B is narrowed is defined as Wt.
- Wt the distance between the centers of the optical fibers 2 (No. 1 fiber and No. N fiber) at both ends when the distance between the plurality of optical fibers 2 in the second connected section 21B is narrowed.
- the number n of the connecting portions 11 of the second connected section 21B is set to such an extent that the above relationship (W1 ⁇ Wt ⁇ W2) can be established.
- the pitch of the V-groove corresponds to the above-mentioned second fiber pitch Pf2.
- the number of V-grooves is N, which is the same as the number of optical fibers 2 constituting the optical fiber tape 1.
- Wv the width from the center position of the V-groove for the 1st fiber (or for the N-fiber) to the inner mountain portion constituting the V-groove for the N-fiber.
- W1 Pf2 ⁇ (N-1)-(Wv / 2)
- W2 Pf2 ⁇ (N-1) + (Wv / 2)
- FIG. 16 is an enlarged view of the XX cross section of FIG. 15B.
- the optical fiber tape 1 is an optical fiber tape in which a plurality of optical fibers 2 are connected in parallel and intermittently connected.
- the tape-forming material is applied in a strip shape to the tape surface (plane parallel to the longitudinal direction and the width direction) of the optical fiber tape 1, and the tape-forming material is cured to form a strip-shaped tape-forming material layer 15. Is formed.
- a connecting portion 11 is formed between the two optical fibers 2 by applying and curing the taped material between the two optical fibers 2. Also in the fourth embodiment, a plurality of connecting portions 11 are intermittently arranged in the longitudinal direction between the two adjacent optical fibers 2.
- a non-connecting portion 13 (separated portion) is formed between the connecting portion 11 and the connecting portion 11 intermittently formed in the longitudinal direction.
- the strip-shaped tape layer 15 is arranged obliquely with respect to the width direction.
- the non-connecting portion 13 is arranged in the width direction of the connecting portion 11 composed of the taped material layer 15.
- a plurality of optical fibers 2 are arranged in parallel at intervals wider than the outer diameter of the optical fiber 2.
- the outer diameter (fiber diameter D) of the optical fiber 2 is 200 ⁇ m
- the interval in the width direction of the optical fiber 2 (first fiber pitch Pf1) is 250 ⁇ m. Therefore, also in the fourth embodiment, a gap is formed between the two adjacent optical fibers 2.
- the intermittently connected optical fiber tape 1 is provided with a connected region 20 and a non-connected region 30, and the connected region 20 and the non-connected region 30 are alternately formed in the longitudinal direction.
- the connecting region 20 all the optical fibers 2 (here, 12 optical fibers 2) are connected by a plurality of connecting portions 11.
- the connecting portion 11 is not formed in the non-connecting region 30.
- the connecting regions 20 are repeatedly arranged in the longitudinal direction at predetermined intervals P1.
- a plurality of connected sections 21 are provided in the connected area 20.
- two connected sections 21 are provided in one connected area 20.
- i is not limited to 2
- i may be 1 or 3 or more.
- the holder 50 for the second fiber pitch Pf2 holds the unconnected region 30 (see S003 in FIG. 4 and FIG. 5B), and the plurality of optical fibers 2 extending from the holder 50 By removing the coating, a plurality of optical fibers 2 can be aligned at the second fiber pitch Pf2 (see S004 and FIG. 6B in FIG. 4). Therefore, even in the intermittently connected optical fiber tape 1 of the fourth embodiment, the work of aligning a plurality of optical fibers 2 parallel at the first fiber pitch Pf1 to the second fiber pitch Pf2 (optical fiber alignment work) is performed. It will be simple.
- the method of aligning the optical fibers 2 parallel to each other at a pitch of 250 ⁇ m at a pitch of 200 ⁇ m has been used as the fusion connection method of the optical fibers 2.
- the method of aligning the optical fibers 2 in this case may be used for other than the fusion splicing of the optical fibers 2.
- FIG. 17 is a flow chart of a manufacturing process of the optical fiber tape 1 with a connector.
- a processing flow (S001 to S004) in which optical fibers 2 constituting an optical fiber tape 1 in which optical fibers 2 having a fiber diameter of 200 ⁇ m are connected in parallel at a pitch of 250 ⁇ m are aligned at a pitch of 200 ⁇ m.
- the distance between the plurality of fiber holes formed in the connector (specifically, the ferrule 70 shown in FIG. 18) may be referred to as "second fiber pitch Pf2".
- the second fiber pitch Pf2 may be narrower than the first fiber pitch Pf1 and is not limited to 200 ⁇ m.
- S001 to S005 in the figure are the same as the processes of S001 to S005 in FIG. 4 described above.
- the description of S001 to S005 will be omitted.
- FIG. 18 is an explanatory diagram of the process of S106 of the fifth embodiment.
- the ferrule 70 in the figure is an optical connector (MT ferrule) defined in JIS C 5981 (F12 type multi-core optical fiber connector).
- MT ferrule optical connector
- JIS C 5981 F12 type multi-core optical fiber connector
- the optical connector attached to the end of the optical fiber 2 is not limited to this ferrule 70 (MT ferrule), and may be another optical connector (for example, a lens ferrule having a lens formed on the end face).
- a plurality of fiber holes are formed in the ferrule 70 with a second fiber pitch Pf2.
- the operator aligns and extends the plurality of optical fibers 2 from the processing side of the holder 50 at the second fiber pitch Pf2 ( An optical fiber bare wire 4) is inserted into each fiber hole of the ferrule 70.
- the operator fills the adhesive filling window 71 of the ferrule 70 with an adhesive, and adheres and fixes the optical fiber 2 to the ferrule 70. As a result, the end portion of the optical fiber 2 is attached to the ferrule 70.
- an intermittently connected optical fiber tape having a plurality of optical fibers 2 parallel to each other at a first fiber pitch Pf1 wider than the fiber diameter D is prepared (S001), and the optical fiber tape 1 is not connected.
- the width of the optical fiber tape 1 is narrowed inside the holder 50 (see S003, FIG. 5B). Therefore, also in the fifth embodiment, the plurality of optical fibers 2 (optical fiber bare wires 4) separated by a single core are seconded by removing the connecting portion 11 of the optical fiber tape 1 extending from the holder 50. It can be aligned at the fiber pitch Pf2 (see S004, FIG. 6B).
- the optical fiber 2 when the optical fiber tape 1 is held by the holder 50, the optical fiber 2 is connected at the end portion (end portion on the processing side) of the optical fiber tape 1 without being separated into single cores. A plurality of optical fibers 2 are connected to each other, leaving the portion 11 (see FIGS. 3 and 5A). Therefore, as compared with the work of holding the plurality of optical fibers separated into single cores in the holder, the handling of the plurality of optical fibers 2 becomes easier even in the fifth embodiment, and the plurality of optical fibers 2 are held in the holder. The workability of holding the 50 is improved. As a result, in the fifth embodiment, the alignment work of the optical fiber 2 becomes simple. Further, in the fifth embodiment, since the optical fiber alignment work is simplified, the manufacturing work of the optical fiber tape with a connector is also simplified.
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Abstract
Description
しかし、バラバラに単心分離された複数の光ファイバをホルダに保持させる作業は、光ファイバの取り扱いが不便であり、作業性が悪い。なお、このような作業性の問題は、250μmピッチの光ファイバテープの複数の光ファイバを200μmピッチに整列させる場合に限られるものではなく、また、一括融着接続する場合に限られるものでもなく、或るピッチ(第1ピッチ)で並列する光ファイバテープの複数の光ファイバを別のピッチ(第2ピッチ)に整列する際に生じ得る問題である。
<光ファイバテープ1の構造>
図1A及び図1Bは、第1実施形態の光ファイバテープ1の説明図である。図1Aは、連結領域20と非連結領域30の説明図である。図1Bは、連結領域20の説明図である。図1Bには、連結領域20に形成されている複数の連結部11の配置が示されている。
図2Cは、第2変形例の連結部11の説明図である。第2変形例に示すように、着色層6の全周にテープ化材によるテープ化材層15が形成されていなくても良い。第2変形例によれば、更に光ファイバ2の細径化を図ることができる。
なお、隣接する2本の光ファイバ2の中心を結ぶ線の上側及び下側の両側に連結部11(又はテープ化材層15)が形成されていなくても良く、隣接する2本の光ファイバ2の中心を結ぶ線の上側又は下側の片側だけに連結部11(又はテープ化材層15)が形成されても良い。また、隣接する2本の光ファイバ2の中心を結ぶ線に対して上下均等に連結部11(又はテープ化材層15)が形成されていなくても良い。
図4は、ファイバ径200μmの光ファイバ2を250μmピッチで並列して間欠的に連結した光ファイバテープ1を200μmピッチ用の融着接続装置40で一括融着させる場合の処理のフロー図である。なお、図中には、200μmのファイバ径の光ファイバ2を250μmピッチで並列して間欠的に連結した光ファイバテープ1を構成する光ファイバ2を200μmピッチに整列させる処理フロー(S001~S004)も含まれている。以下の説明では、融着接続装置40で一括融着させるための光ファイバ2の幅方向の間隔のことを「第2ファイバピッチPf2」と呼ぶことがある。なお、第2ファイバピッチPf2は、第1ファイバピッチPf1よりも狭ければ良く、200μmに限られるものではない。
図5Aに示すように、ホルダ50が光ファイバテープ1の非連結領域30を挟持したとき、ホルダ50の外側(挟持部の外側)では、複数の光ファイバ2は第1ファイバピッチPf1で配列されているのに対し、ホルダ50の内部(挟持部の内部)では、複数の光ファイバ2は第2ファイバピッチPf2で配列されている。このため、ホルダ50が光ファイバテープ1の非連結領域30を挟持したとき、ホルダ50(挟持部)の両端近傍において、光ファイバ2が湾曲することになる。特に、挟持部の基端側では、光ファイバ2が長時間にわたって湾曲し続けることになるため、光ファイバ2の曲げ半径を許容曲げ半径以上にすることが望ましい。また、光ファイバテープ1を構成する複数の光ファイバ2のうち、最も端に位置する光ファイバ2(N心光ファイバテープ1の場合、1番ファイバ又はN番ファイバ)の湾曲が最も急峻になるので、最も端に位置する光ファイバ2の曲げ半径を許容曲げ半径以上にすることが望ましい。ここでは、光ファイバの曲げ半径が許容されるのに必要な長さL1の最小値L0について説明する。
Ls = (Pf1-Pf2)×(N-1)/2
図9Aは、第1実施形態の光ファイバテープ1の変形例の説明図である。図9Aに示す変形例の光ファイバテープ1は、図1Aに示す光ファイバテープ1と比べると、マーク8を有する点で異なっている。
上記の本実施形態の光ファイバ整列方法(若しくは融着接続方法)によれば、ファイバ径Dよりも広い第1ファイバピッチPf1で並列する複数の光ファイバ2を備えた間欠連結型の光ファイバテープを準備し(図4のS001)、光ファイバテープ1の非連結領域30をホルダ50で保持することによって、ホルダ50の内部において光ファイバテープ1の幅を狭めている(図4のS003、図5B参照)。そして、本実施形態では、ホルダ50から延び出た光ファイバテープ1の連結部11を除去することによって、単心分離させた複数の光ファイバ2(光ファイバ裸線4)を第2ファイバピッチPf2で整列させることができる(図4のS004、図6B参照)。本実施形態では、光ファイバテープ1をホルダ50に保持させるとき、光ファイバテープ1の端部(加工側の端部)で光ファイバ2をバラバラに単心分離せずに、連結部11を残して複数の光ファイバ2が連結された状態である(図3、図5A参照)。このため、バラバラに単心分離された複数の光ファイバをホルダに保持させる作業と比べると、本実施形態では、複数の光ファイバ2の取り扱いが簡易になり、複数の光ファイバ2をホルダ50に保持させる作業性が向上する。この結果、本実施形態では、光ファイバ2の整列作業が簡易になる。また、本実施形態では、光ファイバ2の整列作業が簡易になるため、融着作業も簡易になる。
1つの連結領域20における連結区間21の数をiとしたとき、第1実施形態では、iは2であった。但し、iは2に限られるものではなく、他の数でも良い。また、1つの連結区間21における連結部11の数をjとしたとき、第1実施形態では、jは5~6であった。但し、jは5や6に限られるものではなく、他の数でもよい。
前述の実施形態では、ホルダ50の挟持部が光ファイバテープ1の非連結領域30を挟持していた(連結部11の形成された領域を挟持部に挟持させずに、ホルダ50に光ファイバテープ1を保持させていた)。但し、ホルダ50の挟持部が光ファイバテープ1の連結領域20の一部を挟持しても良い。
図14は、第2連結区間21Bにおいて許容可能な連結部11の数の説明図である。
W1 < Wt <W2
Wt = D×(N-1)+C×n
W1 = Pf2×(N-1)-(Wv/2)
W2 = Pf2×(N-1)+(Wv/2)
図15A及び図15Bは、第4実施形態の光ファイバテープ1の説明図である。図16は、図15BのX-X断面の拡大図である。
前述の実施形態では、250μmピッチで並列する光ファイバ2を200μmピッチに整列させる方法は、光ファイバ2の融着接続方法に用いられていた。但し、本件の光ファイバ2の整列方法は、光ファイバ2の融着接続以外のものに用いられても良い。
上記の実施形態は、本発明の理解を容易にするためのものであり、本発明を限定して解釈するためのものではない。本発明は、その趣旨を逸脱することなく、変更・改良され得ると共に、本発明には、その等価物が含まれることは言うまでもない。
4 光ファイバ裸線、5 被覆層、
6 着色層、8 マーク、
11 連結部、13 非連結部、15 テープ化材層、
20 連結領域、21 連結区間、
21A 第1連結区間、21B 第2連結区間、
23 非連結区間、
23A 第1非連結区間、23B 第2非連結区間、
30 非連結領域、
40 融着接続装置、
41 電極部、42 ホルダセット部、
50 ホルダ、51 ベース部、51A 載置面、
52 蓋部、
60 被覆除去装置、61 本体部、61A 刃、
62 把持部、
70 フェルール、71 接着剤充填窓
Claims (15)
- ファイバ径よりも広い第1ピッチで並列する複数の光ファイバを備えた間欠連結型の光ファイバテープを準備すること、
前記光ファイバテープの非連結領域をホルダで保持することによって、前記ホルダの内部において前記光ファイバテープの幅を狭めること、及び、
複数の前記光ファイバを前記ホルダに保持させた状態で、前記ホルダから延び出た複数の前記光ファイバを連結する連結部を除去することによって、前記ホルダから延び出た複数の前記光ファイバを前記第1ピッチよりも狭い第2ピッチで整列させること
を行う光ファイバ整列方法。 - 請求項1に記載の光ファイバ整列方法であって、
複数の前記光ファイバを前記ホルダに保持させた状態で、前記ホルダから延び出た複数の前記光ファイバの被覆を除去することによって、前記連結部を除去することを特徴とする光ファイバ整列方法。 - 請求項1又は2に記載の光ファイバ整列方法であって、
前記非連結領域にマークが形成されており、
前記マークの位置に基づいて前記光ファイバテープと前記ホルダとを位置合わせして、前記光ファイバテープの非連結領域をホルダで保持することを特徴とする光ファイバ整列方法。 - 請求項1~3のいずれかに記載の光ファイバ整列方法であって、
前記光ファイバテープの幅方向に間欠的に前記連結部を配置した連結区間が長手方向に間欠的に複数配置することによって、連結領域が構成されており、
前記非連結領域に隣接する前記連結区間に配置されている前記連結部の数は、前記非連結領域に隣接しない前記連結区間に配置されている前記連結部の数よりも少ないことを特徴とする光ファイバ整列方法。 - 請求項1~4のいずれかに記載の光ファイバ整列方法であって、
前記光ファイバテープの幅方向に間欠的に前記連結部を配置した連結区間が長手方向に間欠的に複数配置することによって、連結領域が構成されており、
前記非連結領域に隣接する前記連結区間に配置されている前記連結部よりも前記幅方向の外側に、非連結部が配置されていることを特徴とする光ファイバ整列方法。 - 請求項1~5のいずれかに記載の光ファイバ整列方法であって、
前記ホルダの挟持部が前記光ファイバテープを挟持する領域は、前記非連結領域であることを特徴とする光ファイバ整列方法。 - 請求項1~5のいずれかに記載の光ファイバ整列方法であって、
前記ホルダの挟持部が前記光ファイバテープを挟持する領域に、前記連結部が設けられている連結領域の一部が含まれていることを特徴とする光ファイバ整列方法。 - 請求項7に記載の光ファイバ整列方法であって、
前記連結領域は、前記光ファイバテープの幅方向に間欠的に前記連結部を配置した複数の第1連結区間と、前記非連結領域に隣接して配置した第2連結区間とを長手方向に間欠的に配置することによって、構成されており、
前記第1連結区間と前記第2連結区間との前記長手方向の間隔は、前記第1連結区間と前記第1連結区間との前記長手方向の間隔よりも長くなっており、
前記ホルダの前記挟持部が前記光ファイバテープを挟持する領域に、前記第2連結区間が含まれていることを特徴とする光ファイバ整列方法。 - 請求項1に記載の光ファイバ整列方法によって、前記ホルダから延び出た複数の前記光ファイバを前記第1ピッチよりも狭い前記第2ピッチで整列させた後、
複数の前記光ファイバを前記ホルダに保持させた状態で、前記ホルダから延び出ており前記被覆の除去された複数の前記光ファイバの端部を所定長さにカットすること、及び、
複数の前記光ファイバを前記ホルダに保持させた状態で、前記ホルダを融着接続装置にセットして、前記第2ピッチで整列された複数の前記光ファイバを前記融着接続装置を用いて融着すること
を行う光ファイバ融着方法。 - 請求項1に記載の光ファイバ整列方法によって、前記ホルダから延び出た複数の前記光ファイバを前記第1ピッチよりも狭い前記第2ピッチで整列させた後、
複数の前記光ファイバを前記ホルダに保持させた状態で、前記ホルダから延び出ており前記被覆の除去された複数の前記光ファイバの端部を所定長さにカットすること、及び、
複数の前記光ファイバを前記ホルダに保持させた状態で、前記第2ピッチで整列された複数の前記光ファイバをフェルールのファイバ穴に挿入して、複数の前記光ファイバの端部を前記フェルールに取り付けること
を行うコネクタ付き光ファイバテープの製造方法。 - ファイバ径よりも広いピッチで並列する複数の光ファイバと、
隣接する2本の光ファイバを連結する複数の連結部と
を備え、複数の前記連結部を間欠的に配置した間欠連結型の光ファイバテープであって、
複数の前記連結部を間欠的に配置させて、前記複数の光ファイバを間欠的に連結させた連結領域と、
前記連結領域と前記連結領域との間に前記連結部の形成されていない非連結領域と
を有することを特徴とする間欠連結型の光ファイバテープ。 - 請求項11に記載の間欠連結型の光ファイバテープであって、
前記非連結領域に、前記光ファイバテープと、当該光ファイバテープを保持するホルダとの位置合わせに用いられるマークが形成されていることを特徴とする間欠連結型の光ファイバテープ。 - 請求項11又は12に記載の間欠連結型の光ファイバテープであって、
前記連結領域は、前記光ファイバテープの幅方向に間欠的に前記連結部を配置した連結区間が長手方向に間欠的に複数配置されることによって、構成されており、
前記非連結領域に隣接する前記連結区間に配置されている前記連結部の数は、前記非連結領域に隣接しない前記連結区間に配置されている前記連結部の数よりも少ないことを特徴とする間欠連結型の光ファイバテープ。 - 請求項11~13のいずれかに記載の間欠連結型の光ファイバテープであって、
前記連結領域は、前記光ファイバテープの幅方向に間欠的に前記連結部を配置した連結区間が長手方向に間欠的に複数配置されることによって、構成されており、
前記非連結領域に隣接する前記連結区間に配置されている前記連結部よりも前記幅方向の外側に、非連結部が配置されていることを特徴とする間欠連結型の光ファイバテープ。 - 請求項11~14のいずれかに記載の間欠連結型の光ファイバテープであって、
前記連結領域は、前記光ファイバテープの幅方向に間欠的に前記連結部を配置した複数の第1連結区間と、前記非連結領域に隣接して配置された第2連結区間とを長手方向に間欠的に配置することによって、構成されており、
前記第1連結区間と前記第2連結区間との前記長手方向の間隔は、前記第1連結区間と前記第1連結区間との前記長手方向の間隔よりも長くなっていることを特徴とする間欠連結型の光ファイバテープ。
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JP2022183873A (ja) * | 2021-05-31 | 2022-12-13 | 住友電気工業株式会社 | 光ファイバリボン |
AU2022310612A1 (en) | 2021-07-13 | 2024-01-18 | Fujikura Ltd. | Optical fiber ribbon |
WO2023058566A1 (ja) | 2021-10-04 | 2023-04-13 | 株式会社フジクラ | 光ファイバテープ心線 |
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- 2020-07-13 KR KR1020217039981A patent/KR20220004209A/ko not_active Application Discontinuation
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JP7157026B2 (ja) | 2022-10-19 |
CN114041075A (zh) | 2022-02-11 |
AU2020347613B2 (en) | 2023-06-22 |
US20240168230A1 (en) | 2024-05-23 |
JP2021043363A (ja) | 2021-03-18 |
TWI761890B (zh) | 2022-04-21 |
AU2023229611A1 (en) | 2023-10-05 |
KR20220004209A (ko) | 2022-01-11 |
US20220317375A1 (en) | 2022-10-06 |
EP4030207A4 (en) | 2023-09-13 |
AU2020347613A1 (en) | 2022-03-24 |
CA3149724A1 (en) | 2021-03-18 |
EP4030207A1 (en) | 2022-07-20 |
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US11927803B2 (en) | 2024-03-12 |
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