WO2015174182A1 - Âme enroulée et câble optique - Google Patents

Âme enroulée et câble optique Download PDF

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Publication number
WO2015174182A1
WO2015174182A1 PCT/JP2015/061346 JP2015061346W WO2015174182A1 WO 2015174182 A1 WO2015174182 A1 WO 2015174182A1 JP 2015061346 W JP2015061346 W JP 2015061346W WO 2015174182 A1 WO2015174182 A1 WO 2015174182A1
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WO
WIPO (PCT)
Prior art keywords
optical fiber
coating
core wire
tape core
cores
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Application number
PCT/JP2015/061346
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English (en)
Japanese (ja)
Inventor
木村　豊明
美昭 長尾
健太 土屋
山本　圭吾
隆郎 平間
裕 橋本
武田　健太郎
吉田　亨
藤井　隆志
茂久 石上
Original Assignee
住友電気工業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 住友電気工業株式会社 filed Critical 住友電気工業株式会社
Priority to KR1020167028429A priority Critical patent/KR102422348B1/ko
Publication of WO2015174182A1 publication Critical patent/WO2015174182A1/fr

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/44—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
    • G02B6/02—Optical fibres with cladding with or without a coating
    • G02B6/02042—Multicore optical fibres

Definitions

  • the present invention relates to a tape core having a plurality of optical fiber cores.
  • the present invention also relates to an optical cable including a plurality of tape core wires.
  • a plurality of parallel optical fiber core wires are collectively covered with a resin coating member.
  • Each of the plurality of optical fiber cores includes an optical fiber and a coating that covers the outer peripheral surface of the optical fiber.
  • a part of the outer peripheral surface of the coating in the longitudinal direction is marked.
  • the lateral pressure applied to the optical fiber differs between the marked part and the non-marked part. Therefore, microbending loss may occur in the longitudinal direction of the optical fiber, and transmission loss may increase.
  • a resin coating member such as the tape core described in Patent Document 1
  • the first object of the present invention is to suppress an increase in transmission loss of a tape core having a configuration in which a plurality of optical fiber cores with markings are collectively covered with a covering member.
  • a second object of the present invention is to suppress an increase in transmission loss of an optical cable including a tape core having a configuration in which a plurality of optical fibers subjected to marking are collectively covered with a covering member.
  • a first aspect that the present invention can take is a tape core, A plurality of optical fiber cores arranged in parallel; A coating member that collectively coats the plurality of optical fiber core wires; With Each of the plurality of optical fiber cores is Optical fiber, A coating covering the periphery of the optical fiber; Markings applied to the outer peripheral surface of the coating; With The thickness of the covering member is determined so that the dimension in the direction orthogonal to the parallel direction and the longitudinal direction of the plurality of optical fiber core wires is 0.32 mm or less.
  • a second aspect that the present invention can take is an optical cable, A spacer having a plurality of slots; Multiple tape cores, With Each of the plurality of tape cores is A plurality of optical fiber cores arranged in parallel; A coating member that collectively coats the plurality of optical fiber core wires; With Each of the plurality of optical fiber cores is Optical fiber, A coating covering the periphery of the optical fiber; Markings applied to the outer peripheral surface of the coating; With In the first portion in the longitudinal direction of each of the plurality of slots, the plurality of tape cores are stacked and arranged in a direction perpendicular to the parallel direction and the longitudinal direction of the plurality of optical fiber cores, In the second portion in the longitudinal direction of each of the plurality of slots, the stacked arrangement is not maintained.
  • the configuration according to the first aspect it is possible to suppress an increase in transmission loss of a tape core having a configuration in which a plurality of optical fiber cores with markings are collectively covered with a covering member.
  • the cross-sectional area of the covering member can be made as small as possible, it is possible to further reduce the force generated by thermal shrinkage during processing of the resin forming the covering member. Further, since the flexibility of the entire tape core can be improved, bending stress generated when the tape core is wound around a bobbin can be reduced. Therefore, an increase in transmission loss of the tape core wire can be suppressed.
  • bending stress generated when the tape core is wound around a bobbin can be dispersed by displacing a part of each optical fiber. Therefore, an increase in transmission loss of the tape core wire can be suppressed.
  • the side pressure applied to the optical fiber through the marking can be reduced as much as possible.
  • the increase in the microbend loss of the optical fiber core wire due to the force generated by the thermal contraction at the time of processing the resin forming the covering member can be suppressed. Therefore, an increase in transmission loss of the tape core wire can be suppressed.
  • the tape core wire according to any one of (1) to (4),
  • the plurality of optical fiber cores include a plurality of optical fiber cores having different marking positions in the longitudinal direction of the optical fiber core.
  • the contraction force applied from the covering member that collectively coats the plurality of optical fiber cores is made different in the longitudinal direction of the tape core wire from the position applied to the optical fiber via the marking. Can do.
  • the lateral pressure applied to the optical fiber via the marking can be dispersed in the longitudinal direction of the tape core wire, and local concentration of stress can be avoided. Therefore, an increase in transmission loss of the tape core wire can be suppressed.
  • the tape core wire according to any one of (1) to (5), The coating is A primary coating for coating the optical fiber; A secondary coating for coating the primary coating; Contains The Young's modulus of the primary coating is 0.8 MPa or less.
  • the lateral pressure applied to the optical fiber through the marking can be effectively reduced. Therefore, an increase in the transmission loss of the tape core due to the microbend loss of the optical fiber core can be suppressed.
  • Optical cable (1) to the tape core wire according to any one of (6); A tube containing the tape core, A jacket covering the periphery of the tube; It has.
  • An optical cable A spacer having a plurality of slots; Multiple tape cores, With Each of the plurality of tape cores is A plurality of optical fiber cores arranged in parallel; A coating member that collectively coats the plurality of optical fiber core wires; With Each of the plurality of optical fiber cores is Optical fiber, A coating covering the periphery of the optical fiber; Markings applied to the outer peripheral surface of the coating; With In the first portion in the longitudinal direction of each of the plurality of slots, the plurality of tape cores are stacked and arranged in a direction perpendicular to the parallel direction and the longitudinal direction of the plurality of optical fiber cores, In the second portion in the longitudinal direction of each of the plurality of slots, the stacked arrangement is not maintained.
  • the direction of the stress applied to the plurality of tape cores accommodated in each slot is likely to be uneven in the longitudinal direction of the optical cable. Therefore, stress accumulation in one direction, such as when the optical cable is wound around the drum, can be more reliably eliminated, and an increase in transmission loss of each tape core and, in turn, the optical cable can be suppressed.
  • the optical cable according to (8) or (9), The thickness of the covering member is determined so that each dimension of the plurality of tape core wires in the parallel direction and the direction orthogonal to the longitudinal direction is 0.32 mm or less.
  • the cross-sectional area of the covering member can be made as small as possible, the shrinkage force of the resin forming the covering member can be further reduced. Further, the flexibility of the entire tape core can be improved. Therefore, an increase in the transmission loss of the tape core can be suppressed, and consequently an increase in the transmission loss of the optical cable can be suppressed.
  • the bending stress generated in the tape core can be dispersed by displacing a part of each optical fiber. Therefore, an increase in the transmission loss of the tape core can be suppressed, and consequently an increase in the transmission loss of the optical cable can be suppressed.
  • the side pressure applied to the optical fiber through the marking can be reduced as much as possible.
  • the increase in the microbend loss of the optical fiber core wire due to the contraction force of the covering member can be suppressed. Therefore, an increase in the transmission loss of the tape core can be suppressed, and consequently an increase in the transmission loss of the optical cable can be suppressed.
  • the coating is A primary coating for coating the optical fiber;
  • a secondary coating for coating the primary coating; Contains The Young's modulus of the primary coating is 0.8 MPa or less.
  • the lateral pressure applied to the optical fiber through the marking can be effectively reduced. Therefore, an increase in the transmission loss of the tape core due to the microbend loss of the optical fiber can be suppressed, and consequently an increase in the transmission loss of the optical cable can be suppressed.
  • FIG. 1 is a diagram showing the configuration of the optical fiber core wire 1.
  • FIG. 1A shows an appearance of a part of two optical fiber cores 1 viewed from a direction orthogonal to the longitudinal direction.
  • FIG. 1B shows a cross section taken along line IB-IB in FIG. 1A for one optical fiber core wire 1.
  • the “cross section” means a section viewed from the longitudinal direction of the optical fiber core wire 1.
  • the optical fiber core wire 1 includes an optical fiber 1a.
  • the optical fiber 1a is made of, for example, quartz glass or plastic.
  • the optical fiber 1a includes a core and a clad.
  • the core is disposed at the center in the radial direction and has a first refractive index.
  • the clad covers the periphery of the core and has a second refractive index lower than the first refractive index.
  • the optical fiber core wire 1 includes a primary coating 1b (an example of a coating).
  • the primary coating 1b covers the optical fiber 1a.
  • the primary coating 1b is made of, for example, an ultraviolet curable resin.
  • the optical fiber core wire 1 includes a secondary coating 1c (an example of a coating).
  • the secondary coating 1c covers the primary coating 1b.
  • the secondary coating 1c is made of, for example, an ultraviolet curable resin that is harder than the primary coating 1b.
  • the optical fiber core 1 includes a colored ink layer 1d (an example of a coating).
  • the colored ink layer 1d covers the periphery of the secondary coating 1c.
  • the colored ink layer 1d is formed to exhibit a predetermined color in order to identify the plurality of optical fiber cores 1 from each other.
  • the colored ink layer 1 d is formed over the entire longitudinal direction of the optical fiber core wire 1.
  • the colored ink layer 1d can be omitted as necessary.
  • the optical fiber core wire 1 is provided with a marking 1e.
  • the marking 1e is applied to a part in the longitudinal direction of the optical fiber core wire 1 so as to exhibit a predetermined color.
  • the size of each marking 1e along the longitudinal direction of the optical fiber core 1 is visually recognized by forming discretely or continuously dots having a diameter of 0.2 to 0.4 mm that exhibit a predetermined color. Is 20 to 40 mm.
  • the marking 1e is applied between the secondary coating 1c and the colored ink layer 1d so as to cover a part of the outer peripheral surface of the secondary coating 1c.
  • the marking 1e may be applied so as to cover a part of the outer peripheral surface of the colored ink layer 1d.
  • the marking 1e may be applied between the primary coating 1b and the secondary coating 1c so as to cover a part of the outer peripheral surface of the primary coating 1b.
  • the marking 1e is applied to identify the plurality of optical fiber cores 1 in addition to or instead of the colored ink layer 1d.
  • two optical fiber cores 1 are distinguished by the number of markings 1e.
  • the plurality of optical fiber cores 1 can be distinguished from each other by at least one of the number, the color, the position, and the length of the optical fiber core 1 in the longitudinal direction.
  • FIG. 2 shows a cross section of the tape core wire 10 according to the first embodiment.
  • the tape core wire 10 includes a plurality of optical fiber core wires 1.
  • Each of the plurality of optical fiber cores 1 is the same as that described with reference to FIG. 1, but the illustration of the colored ink layer 1d is omitted.
  • the plurality of optical fiber cores 1 are juxtaposed in a direction orthogonal to the respective longitudinal directions.
  • the diameter d of each optical fiber core wire 1 is, for example, 0.25 mm.
  • the four optical fiber cores 1 are arranged in parallel, but the number of the optical fiber cores 1 provided in the tape core wire 10 can be appropriately determined to be two or more.
  • the tape core wire 10 includes a covering member 2.
  • the covering member 2 covers a plurality of optical fiber cores 1 at once.
  • the covering member 2 is made of, for example, any one of an ultraviolet curable resin, a thermoplastic resin, and a thermosetting resin.
  • the inventors examined the cause of the significant increase in transmission loss in the optical fiber core with a marking on the optical fiber, and the force generated by thermal contraction during processing of the resin forming the covering member ( Hereinafter, it was considered that the contraction force acts on the marking to increase the microbend loss of the optical fiber. Therefore, the inventors considered that the appropriate selection of the thickness of the covering member contributes to the suppression of the increase in the microbend loss, and measured the contraction force of the covering member and the transmission loss of the tape core wire while changing the thickness of the covering member. As a result of repeated studies, a thickness of a covering member capable of suppressing an increase in transmission loss has been found, and will be described below.
  • the shrinkage force of the covering member was determined as the product of the cross-sectional area of the covering member, the Young's modulus of the resin forming the covering member, the linear expansion coefficient of the resin, and the temperature difference between the processing temperature and room temperature.
  • the Young's modulus was 910 MPa
  • the linear expansion coefficient was 1.5 ⁇ 10 ⁇ 4
  • the processing temperature was 45 ° C. (the difference from the normal temperature was 22 ° C.).
  • FIG. 3 shows a cross section of the tape core wire 10X according to the comparative example.
  • the tape core wire 10X includes a plurality of optical fiber core wires 1 arranged in parallel.
  • the structure of each optical fiber core wire 1 is the same as that described with reference to FIG.
  • the tape core wire 10 ⁇ / b> X includes a covering member 2 ⁇ / b> X that collectively covers the plurality of optical fiber core wires 1.
  • the thickness of the covering member 2X is determined so that the dimension T0 of the tape core wire 10X in the direction perpendicular to the parallel direction and the longitudinal direction of the plurality of optical fiber core wires 1 is 0.40 mm. Yes.
  • the covering member 2 is formed such that the dimension T1 of the tape core wire 10 in the direction orthogonal to the parallel direction and the longitudinal direction of the plurality of optical fiber cores 1 is 0.32 mm. Thickness is defined.
  • an increase in transmission loss of the tape core wire 10 in which the marking 1e is applied to the optical fiber core wire 1 can be suppressed. It is considered that the microbend loss of the optical fiber core wire 1 is suppressed by reducing the contraction force of the resin forming the covering member 2, which contributes to the suppression of the increase in transmission loss of the tape core wire 10.
  • FIG. 4 shows a cross section of the tape core wire 10A according to the second embodiment. Elements that are the same as or equivalent to elements included in the tape core wire 10 according to the first embodiment are given the same reference numerals, and repeated descriptions are omitted.
  • the tape core wire 10A includes a covering member 2A.
  • the covering member 2A covers a plurality of optical fiber cores 1 arranged in parallel.
  • the thickness of the covering member 2A is determined so that the dimension T2 of the tape core wire 10A in the direction orthogonal to the parallel direction and the longitudinal direction of the plurality of optical fiber cores 1 is 0.29 mm.
  • FIG. 5 shows a cross section of the tape core wire 10B according to the third embodiment. Elements that are the same as or equivalent to elements included in the tape core wire 10 according to the first embodiment are given the same reference numerals, and repeated descriptions are omitted.
  • the tape core wire 10B includes a covering member 2B.
  • the covering member 2B collectively covers a plurality of optical fiber cores 1 arranged in parallel.
  • the thickness of the covering member 2B is determined so that the dimension T3 of the tape core wire 10B in the direction orthogonal to the parallel direction and the longitudinal direction of the plurality of optical fiber cores 1 is 0.28 mm. Further, a part of the covering member 2 ⁇ / b> B located between a plurality of adjacent optical fiber cores 1 is recessed along the outer peripheral surface of each optical fiber core wire 1.
  • the cross-sectional area of the covering member 2B can be made as small as possible, an increase in the microbend loss of the optical fiber core wire 1 due to the contraction stress can be suppressed.
  • the flexibility of the entire tape core 10B can be improved. Thereby, the bending stress produced when the tape core wire 10B is wound around the bobbin can be reduced, and an increase in transmission loss of the tape core wire 10B can be suppressed.
  • FIG. 6 shows a tape core wire 10C according to the fourth embodiment.
  • FIG. 6A shows an external appearance of a part of the tape core wire 10C as viewed from a direction orthogonal to the longitudinal direction.
  • FIG. 6B shows a cross section taken along line VIB-VIB in FIG.
  • Elements that are the same as or equivalent to elements included in the tape core wire 10B according to the third embodiment are given the same reference numerals, and repeated descriptions are omitted.
  • the plurality of optical fiber cores 1 that are collectively covered with the covering member 2B are intermittently separated in the longitudinal direction. That is, a part of each optical fiber core wire 1 can be relatively displaced with respect to the other optical fiber core wires 1.
  • the bending stress generated when the tape core wire 10C is wound around the bobbin can be dispersed by displacing a part of each optical fiber core wire 1. Therefore, an increase in transmission loss of the tape core wire 10C can be suppressed.
  • the thickness of the marking 1e is 5 ⁇ m or less.
  • the side pressure applied to the optical fiber 1a via the marking 1e can be reduced as much as possible.
  • the increase in the microbend loss of the optical fiber core wire 1 resulting from the shrinkage stress of the covering member 2 (2A, 2B) can be suppressed. Therefore, an increase in transmission loss of the tape core wire 10 (10A, 10B, 10C) can be suppressed.
  • a plurality of optical fiber cores 1 are arranged in parallel as shown in FIG.
  • the markings 1e are collectively applied to the plurality of optical fiber cores 1 arranged in parallel.
  • the position where the marking 1e is applied is the same in the longitudinal direction of each optical fiber core wire 1.
  • the plurality of optical fiber cores 1 to which the marking 1e is applied are collectively covered with the covering member 2 (2A, 2B). According to such a method, the marking 1e can be efficiently applied.
  • the position where the marking 1e is applied may be made different in the longitudinal direction of each optical fiber core wire 1.
  • the position where the contraction stress applied from the covering member 2 (2A, 2B) covering the plurality of optical fiber cores 1 at once is applied to the optical fiber 1a via the marking 1e
  • the longitudinal direction of the core wire 10 (10A, 10B, 10C) can be different.
  • the lateral pressure applied to the optical fiber 1a via the marking 1e can be distributed in the longitudinal direction of the tape core wire 10 (10A, 10B, 10C), and local concentration of stress can be avoided. Therefore, an increase in transmission loss of the tape core wire 10 (10A, 10B, 10C) can be suppressed.
  • the positions of the markings 1e do not have to be different for all the optical fiber cores 1 included in the tape core wire 10 (10A, 10B, 10C). It is only necessary that at least one set of the plurality of optical fiber cores 1 whose positions of the markings 1e in the longitudinal direction are different is included in the tape core wire 10 (10A, 10B, 10C).
  • the Young's modulus of the primary coating 1b is 0.8 MPa or less.
  • the lateral pressure applied to the optical fiber 1a via the marking 1e can be effectively reduced. Therefore, an increase in transmission loss of the tape core wire 10 (10A, 10B, 10C) due to the microbend loss of the optical fiber core wire 1 can be suppressed.
  • the bending loss that increases with each winding on a bobbin having a diameter of 15 mm in the tape core wire 10 (10A, 10B, 10C) according to each of the above embodiments is set to 0.01 dB or less.
  • the change in the transmission loss value of light having a wavelength of 1550 nm is before the immersion in water. The value is set to 0.1 dB / km or less.
  • FIG. 8 shows a cross section of the optical cable 20 including the tape core wire 10 according to the first embodiment.
  • the optical cable 20 includes a tube 21 and a jacket 22.
  • the tube 21 extends along the longitudinal direction of the optical cable 20 and accommodates the tape core wire 10.
  • the tube 21 is made of, for example, polyethylene or polybutyl terephthalate. In the illustrated example, five tape cores 10 are accommodated in the tube 21, but the number of tape cores 10 can be arbitrarily determined according to the specifications of the optical cable 20.
  • any one of the tape core wires 10 ⁇ / b> A, 10 ⁇ / b> B, and 10 ⁇ / b> C may be accommodated in the tube 21.
  • the gap 23 between the tape core wire 10 and the tube 21 may be filled with a filler such as resin or gel.
  • the jacket 22 extends along the longitudinal direction of the optical cable 20 and covers the periphery of the tube 21.
  • the jacket 22 is made of, for example, polyvinyl chloride or polyethylene.
  • FIG. 9 shows a cross section of the optical cable 30 including the tape core wire 10 according to the first embodiment.
  • the optical cable 30 includes a spacer 31 and a jacket 32.
  • the spacer 31 extends along the longitudinal direction of the optical cable 30 and has a plurality of slots 31a.
  • the plurality of slots 31 a are formed on the outer peripheral surface of the spacer 31 along the longitudinal direction of the optical cable 30.
  • a plurality of tape core wires 10 are accommodated in each slot 31a.
  • the jacket 32 extends along the longitudinal direction of the optical cable 30 and covers the periphery of the spacer 31.
  • the jacket 32 is made of, for example, polyvinyl chloride or polyethylene.
  • the plurality of tape cores 10 are oriented in a direction orthogonal to the parallel direction and the longitudinal direction of the plurality of optical fiber cores 1. They are stacked.
  • the “stacked and arranged” state means a state in which both ends of the plurality of optical fiber cores 1 in the plurality of optical fiber cores 10 are aligned.
  • the state where “laminated arrangement is not maintained” means a state in which the both ends of the plurality of tape cores 10 are not aligned.
  • the optical cable 30 When the optical cable 30 is wound around a drum, stress continues to be applied in one direction to the plurality of laminated tape cores. When this stress acts on the optical fiber 1a as a lateral pressure, the transmission loss of each tape core wire 10, and consequently the optical cable 30, may increase. However, as in this example, in a part of the optical cable 30 in the longitudinal direction, the stacking arrangement of the plurality of tape cores 10 is positively broken, so that the directions of stress applied to the tape cores 10 in the part are uneven. it can. Therefore, the accumulation of stress in one direction, such as when the optical cable 30 is wound around a drum, is eliminated, and an increase in transmission loss of each tape core wire 10 and thus the optical cable 30 can be suppressed.
  • the tape core wire 10 accommodated in each slot 31a may be replaced with any one of the above-described tape core wires 10A, 10B, and 10C. Further, from the viewpoint of suppressing an increase in transmission loss of the entire optical cable 30, instead of the tape core wire 10, the tape core wire 10X according to the comparative example shown in FIG. 3 may be accommodated in each slot 31a.
  • each slot 31 a extends in a spiral shape along the longitudinal direction of the spacer 31 and forms a unidirectional twist.
  • each slot 31 a may extend along the longitudinal direction of the spacer 31 so as to form a so-called SZ twist.
  • the direction of the stress applied to the plurality of tape cores accommodated in each slot 31a is likely to be uneven in the longitudinal direction of the optical cable 30. Therefore, the accumulation of stress in one direction, such as when the optical cable 30 is wound around a drum, is more reliably eliminated, and an increase in transmission loss of each tape core wire 10 and thus the optical cable 30 can be suppressed.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)

Abstract

L'invention concerne un élément de revêtement (2) qui couvre collectivement une pluralité d'âmes de fibre optique (1) agencées en parallèle. Chaque âme de fibre optique de la pluralité d'âmes de fibre optique (1) comprend une fibre optique (1a), un enrobage (1c) et un marquage (1e). L'enrobage (1c) recouvre la périphérie de la fibre optique (1a). Le marquage (1e) est formé sur la surface périphérique externe de l'enrobage (1c). L'épaisseur de l'élément de revêtement (2) est déterminée de telle sorte que sa taille (T1) dans la direction orthogonale à la direction d'agencement en parallèle et à la direction longitudinale de la pluralité d'âmes de fibre optique (1) soit égale ou inférieure à 0,32 mm.
PCT/JP2015/061346 2014-05-16 2015-04-13 Âme enroulée et câble optique WO2015174182A1 (fr)

Priority Applications (1)

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KR1020167028429A KR102422348B1 (ko) 2014-05-16 2015-04-13 테이프 심선 및 광 케이블

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JP2014-102393 2014-05-16
JP2014102393A JP6248798B2 (ja) 2014-05-16 2014-05-16 テープ心線、および光ケーブル

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EP3404460A4 (fr) * 2016-01-13 2019-08-21 Sumitomo Electric Industries, Ltd. Âme de ruban de fibre optique de type à connexion intermittente, câble optique, et procédé de fabrication d'âme de ruban de fibre optique de type à connexion intermittente
US20210364724A1 (en) * 2018-10-25 2021-11-25 Sterlite Technologies Limited Method of ring marking of an optical fiber and optical fiber thereof
WO2023032999A1 (fr) * 2021-08-31 2023-03-09 住友電気工業株式会社 Fibre optique

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JP2017219691A (ja) * 2016-06-07 2017-12-14 旭硝子株式会社 プラスチック光ファイバリボン
JP6808686B2 (ja) * 2018-06-27 2021-01-06 株式会社フジクラ 間欠連結型光ファイバテープ、及び間欠連結型光ファイバテープの製造方法
JP6855519B2 (ja) 2019-02-08 2021-04-07 株式会社フジクラ 光ファイバユニット及び光ファイバユニットの加工方法
AU2019472715B2 (en) * 2019-10-30 2022-11-03 Fujikura Ltd. Intermittently connected optical fiber ribbon and method for manufacturing intermittently connected optical fiber ribbon
TWI739195B (zh) * 2019-11-04 2021-09-11 日商藤倉股份有限公司 間斷連結型光纖膠帶，及間斷連結型光纖膠帶的製造方法

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