WO2013121494A1 - 光ファイバ心線、光ファイバテープ心線および光ケーブル - Google Patents

光ファイバ心線、光ファイバテープ心線および光ケーブル Download PDF

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Publication number
WO2013121494A1
WO2013121494A1 PCT/JP2012/008037 JP2012008037W WO2013121494A1 WO 2013121494 A1 WO2013121494 A1 WO 2013121494A1 JP 2012008037 W JP2012008037 W JP 2012008037W WO 2013121494 A1 WO2013121494 A1 WO 2013121494A1
Authority
WO
WIPO (PCT)
Prior art keywords
coating layer
optical fiber
primary coating
core wire
water
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/JP2012/008037
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
稔 笠原
稔 齋藤
悦宏 新子谷
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Furukawa Electric Co Ltd
Original Assignee
Furukawa Electric Co Ltd
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 Furukawa Electric Co Ltd filed Critical Furukawa Electric Co Ltd
Priority to BR112014019240A priority Critical patent/BR112014019240A8/pt
Priority to EP12868568.2A priority patent/EP2816384A4/en
Priority to CN201280069889.8A priority patent/CN104115049B/zh
Priority to IN4882CHN2014 priority patent/IN2014CN04882A/en
Publication of WO2013121494A1 publication Critical patent/WO2013121494A1/ja
Priority to US14/296,003 priority patent/US9846292B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
    • G02B6/4401—Optical cables
    • G02B6/4429—Means specially adapted for strengthening or protecting the cables
    • G02B6/44384—Means specially adapted for strengthening or protecting the cables the means comprising water blocking or hydrophobic materials
    • 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
    • G02B6/02395—Glass optical fibre with a protective coating, e.g. two layer polymer coating deposited directly on a silica cladding surface during fibre manufacture
    • 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
    • G02B6/44—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
    • G02B6/4404—Multi-podded

Definitions

  • the present invention relates to an optical fiber core wire, an optical fiber tape core wire, and an optical cable excellent in water resistance.
  • An exemplary optical fiber core used in such an optical fiber includes a glass fiber, a primary coating layer coated on the outer periphery of the glass fiber, and a secondary coating layer coated on the outer periphery of the primary coating layer. And a colored layer coated on the outer periphery of the secondary coating layer.
  • Patent Document 1 a material used for a primary coating layer of an optical fiber core wire is coated on a glass plate and immersed in warm water, and then the material is peeled off at an angle of 90 degrees from the glass plate. Measure the peel force when It is disclosed that the use of a material adjusted so that the peeling force has a predetermined value as the primary coating layer suppresses the generation of large water bubbles during immersion in warm water and reduces the increase in transmission loss.
  • Patent Document 2 discloses that by adjusting the glass transition temperatures of the primary coating layer and the secondary coating layer of the optical fiber core wire to predetermined values, generation of large water bubbles during hot water immersion is suppressed. It is disclosed that an increase in transmission loss is reduced.
  • the present inventor has intensively researched that the distribution of water bubbles formed in the primary coating layer during water immersion is non-uniform, resulting in an increase in transmission loss and separation of the interface between the glass fiber and the primary coating layer. I found a new cause. Therefore, in the present invention, rather than suppressing the formation of water bubbles in the primary coating layer at the time of water immersion, rather than improving the water resistance by uniformly forming water bubbles in the primary coating layer, Takes a different approach.
  • the object of the present invention is to generate water bubbles uniformly in the primary coating layer during water immersion, thereby suppressing the separation of the interface between the glass fiber and the primary coating layer and reducing the increase in transmission loss. It is providing the optical fiber core wire excellent in property.
  • the optical fiber core wire 100 includes an optical fiber including a glass fiber 101, a primary coating layer 102 coated on the outer periphery of the glass fiber 101, and a secondary coating layer 103 coated on the outer periphery of the primary coating layer 102.
  • a strand 100a and a colored layer 104 coated on the outer periphery of the optical fiber strand 100a are provided.
  • the primary coating layer 102 becomes a soft buffer layer, and the secondary coating layer 103 functions as a hard protective layer, thereby increasing transmission loss even when an external force is applied to the optical fiber 100a. Can be suppressed.
  • the elastic modulus of the primary coating layer 102 is 0.2 to 3 MPa
  • the elastic modulus of the secondary coating layer 103 is 500 to 1200 MPa
  • the elasticity of the colored layer 104 is The rate is preferably 100 to 2000 MPa.
  • the coating material of the colored layer 104 is colored with a dye or a pigment for visual recognition.
  • the colored layer 104 is not necessarily colored, and may be a non-colored tertiary coating layer for maintaining strength or the like.
  • the primary coating layer 102 or the secondary coating layer 103 is colored with a dye or a pigment and the colored layer 104 is not provided is becoming widespread.
  • the collective coating layer used to form an optical fiber tape core by arranging a plurality of optical fiber cores in parallel and coating them together acts as a tertiary coating layer. To do.
  • this invention presupposes the structure by which the tertiary coating layer whose elasticity modulus is 100 Mpa or more is coat
  • the colored layer acts as a semipermeable membrane, and osmotic pressure is generated due to a difference in the concentration of the aqueous solution at the delamination portion and the water outside the color layer, and water is further separated from the delamination portion. Delamination may grow by moving to. Therefore, especially in an optical fiber having a colored layer, the transmission loss may be remarkably increased.
  • the glass fiber 101 has a diameter of 90 to 150 ⁇ m, preferably about 125 ⁇ m, and the primary coating layer 102 and the secondary coating layer 103 each have a thickness of 10 to 60 ⁇ m, preferably 20 to 50 ⁇ m. The thickness is 5 to 20 ⁇ m.
  • the size of each layer is not limited to these values and can be arbitrarily changed.
  • a plurality of optical fiber core wires 100 may be combined into a tape shape.
  • a schematic diagram of the optical fiber ribbon 200 thus configured is shown in FIG.
  • the optical fiber ribbon 200 has a configuration in which a batch coating layer 201 covers the outside of a plurality of optical fibers 100 arranged in parallel.
  • the elastic modulus of the collective coating layer 201 is preferably 100 to 2000 MPa from the viewpoint of maintaining the strength.
  • the size of the optical fiber ribbon 200 is about 320 ⁇ m thick and about 1.1 mm wide.
  • the size of the optical fiber ribbon 200 and the number of the optical fibers 100 are not limited to these values and can be arbitrarily changed.
  • an optical fiber 100a may be used instead of the optical fiber 100.
  • the outer side of the secondary coating layer 103 of the optical fiber 100a is configured to cover the collective coating layer 201 as a tertiary coating layer.
  • the optical fiber cable 300 is, for example, a 40-core SZ cable.
  • the optical fiber cable 300 includes a spacer 301 having a five-groove SZ slot 302. In each SZ slot 302, two optical fiber ribbons 200 are accommodated.
  • a presser winding tape 303 is wound around the spacer 301, and the outer side of the presser winding tape 303 is covered with a sheath 304.
  • a tension member 305 is provided at the center of the cross section of the spacer 301.
  • a tracer mark 306 is provided on the outer periphery of the spacer 301, and a tear string 307 is provided on a part of the outer periphery of the presser winding tape 303.
  • the SZ slot 302 is not limited to the five-groove type, and the number of grooves can be selected as appropriate. Further, the number of the optical fiber ribbons 200 in the SZ slot 302 is not limited to two, and the number can be selected as appropriate. Further, an S slot may be used instead of the SZ slot.
  • An elastic modulus (also called Young's modulus) is used as an index representing the hardness of each coating layer.
  • the elastic modulus is measured for each coating layer after fabrication of the optical fiber.
  • a specific method for measuring the elastic modulus a known method may be used.
  • the limit adhesion is an index representing the adhesion at the interface between the glass fiber and the primary coating layer under wet heat.
  • the limit adhesion is defined as follows. Note that the definition of the limit adhesion is based on the description in Patent Document 3.
  • An optical fiber core wire is prepared by cutting all the circumference of the coating layer so as to leave only the glass fiber at a position 10 mm away from one end, and the coating layer in the range of 10 mm from the one end of the optical fiber core wire is bonded. Fix to sandpaper with agent. In an atmosphere of a temperature of 60 ° C.
  • the load test apparatus 900 includes a stage 901 on which the optical fiber 100 to be measured is placed, a load portion 902 that can adjust the magnitude of a load that is provided apart from the stage 901, and a load portion 902.
  • the rod 903 is provided so as to be perpendicular to the longitudinal direction of the optical fiber core 100 placed on the stage 901 and parallel to the surface of the stage 901.
  • the rod 903 and the stage 901 sandwich the optical fiber core wire 100, and the load portion 902 applies a load to one point B on the optical fiber core wire 100. Thereafter, when a predetermined time elapses, the drive unit 904 moves the load unit 902 and the rod 903 away from the optical fiber core wire 100, and the load unit 902 does not apply a load to the optical fiber core wire 100.
  • the start and end of load application may be controlled by the user's hand, or may be performed automatically by providing a control unit. Any measuring device may be used as long as a predetermined load can be applied to one point B of the optical fiber core 100 from a direction perpendicular to the longitudinal direction of the optical fiber core for a predetermined time.
  • the optical fiber core wire 100 to be measured is fixed to the load test apparatus 900. Then, a predetermined load is applied at a certain point for 4.5 seconds, and the load is repeatedly applied to 30 points at intervals of about 6 mm. Thereafter, using an optical microscope, the presence or absence of delamination or tear at each point is observed. Further, the load is increased, and each time the load application and observation at 30 points different from the previous observation are repeated. This creates a plot of load magnitude versus delamination or number of tears. Note that the number of points to which the load is applied is not limited to 30. The minimum load when delamination or tear is observed at 50% or more of the total number of points to which the load is applied is defined as D50 and T50, respectively.
  • the elastic modulus of the primary coating layer In order to make delamination difficult to occur (that is, to increase D50), it is only necessary to lower the elastic modulus of the primary coating layer and increase the elastic modulus of the secondary coating layer to alleviate the external force transmitted to the glass primary interface. .
  • an additive such as a silane coupling agent may be added to the primary coating layer material to increase the adhesion between the surface of the glass fiber and the primary coating layer.
  • the elastic modulus of the primary coating layer may be lowered, that is, the crosslinking density of the primary coating layer may be lowered.
  • a hydrophobic oligomer such as polytetramethylene glycol (PTMG) is used as a primary coating layer material to prevent local water bubbles from being generated, and acrylamide
  • PTMG polytetramethylene glycol
  • the water absorption can be adjusted by adding a hydrophilic monomer such as. Therefore, the material of each coating layer is adjusted so that D50 and T50 become predetermined values, and the mixing ratio of the hydrophobic substance and hydrophilic substance of the primary coating layer material is adjusted so that water bubbles are evenly distributed.
  • Examples 1 to 4 and Comparative Examples 1 to 3 are prepared, which are optical fiber tapes having the configuration shown in FIG. 2 and are optical fiber tapes having various properties of each coating layer.
  • the optical fiber core wire was taken out from the fiber tape core wire, and the above-mentioned elastic modulus, D50, T50, and critical adhesion were measured.
  • the transmission loss before warm water immersion was measured using the optical fiber ribbon.
  • the observation of the water bubble and the measurement of the transmission loss were performed. The results are shown in Table 1.
  • the presence / absence of delamination was determined to be present if at least one delamination of the glass primary interface occurred at any of the six observation locations, and absent if none occurred.
  • the largest number of micro bubbles represents the number of the most observed water bubbles among the six observation points. Further, the minimum number of microbubbles represents the smallest number of water bubbles observed among the six observation locations. When the number of water bubbles is more than 10, “> 10” is indicated.
  • the maximum diameter of the microbubbles represents the diameter of the largest water bubble among the six observation points. When the shape of the water bubbles is elliptical, the longest distance passing through the center of the water bubbles is defined as the diameter of the water bubbles. When the diameter of the water bubbles is larger than 10 ⁇ m, “> 10” is indicated.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
  • Surface Treatment Of Glass Fibres Or Filaments (AREA)
PCT/JP2012/008037 2012-02-17 2012-12-17 光ファイバ心線、光ファイバテープ心線および光ケーブル Ceased WO2013121494A1 (ja)

Priority Applications (5)

Application Number Priority Date Filing Date Title
BR112014019240A BR112014019240A8 (pt) 2012-02-17 2012-12-17 Fibra óptica revestida, fita de fibras ópticas, e, cabo óptico
EP12868568.2A EP2816384A4 (en) 2012-02-17 2012-12-17 OPTIC FIBER C UR YARN, OPTICALLY FIBER C UR CABLE YARN AND OPTICAL CABLE
CN201280069889.8A CN104115049B (zh) 2012-02-17 2012-12-17 涂覆光学纤维、光学纤维带及光缆
IN4882CHN2014 IN2014CN04882A (https=) 2012-02-17 2012-12-17
US14/296,003 US9846292B2 (en) 2012-02-17 2014-06-04 Coated optical fiber, optical fiber ribbon, and optical cable

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2012033088A JP5465741B2 (ja) 2012-02-17 2012-02-17 光ファイバ心線、光ファイバテープ心線および光ケーブル
JP2012-033088 2012-02-17

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US14/296,003 Continuation US9846292B2 (en) 2012-02-17 2014-06-04 Coated optical fiber, optical fiber ribbon, and optical cable

Publications (1)

Publication Number Publication Date
WO2013121494A1 true WO2013121494A1 (ja) 2013-08-22

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Country Status (7)

Country Link
US (1) US9846292B2 (https=)
EP (1) EP2816384A4 (https=)
JP (1) JP5465741B2 (https=)
CN (1) CN104115049B (https=)
BR (1) BR112014019240A8 (https=)
IN (1) IN2014CN04882A (https=)
WO (1) WO2013121494A1 (https=)

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Publication number Priority date Publication date Assignee Title
JP6569429B2 (ja) * 2015-09-25 2019-09-04 住友電気工業株式会社 光ファイバテープ心線
KR102325812B1 (ko) * 2016-09-30 2021-11-11 가부시키가이샤후지쿠라 광섬유 착색 심선, 광섬유 케이블 및 광섬유 착색 심선의 제조 방법
JP6841837B2 (ja) 2016-09-30 2021-03-10 株式会社フジクラ 光ファイバリボンの製造方法および光ファイバケーブルの製造方法
US10451795B2 (en) 2017-11-16 2019-10-22 Ofs Fitel, Llc Optical fiber for applications requiring high system optical signal-to-noise ratio performance and low degradation from nonlinear impairments
WO2019139018A1 (ja) * 2018-01-10 2019-07-18 住友電気工業株式会社 光ファイバケーブルおよび光ファイバケーブルの製造方法
JP7331960B2 (ja) * 2020-02-13 2023-08-23 日本電信電話株式会社 光ファイバのマイクロベンドを検知する装置及び方法
EP4231073B1 (en) * 2020-10-19 2026-01-28 Sumitomo Electric Industries, Ltd. Optical fiber ribbon
US20230236356A1 (en) * 2022-01-25 2023-07-27 Corning Research & Development Corporation Single-mode optical fiber with dyed thin coating

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See also references of EP2816384A4

Also Published As

Publication number Publication date
JP5465741B2 (ja) 2014-04-09
CN104115049B (zh) 2018-01-02
IN2014CN04882A (https=) 2015-09-18
US9846292B2 (en) 2017-12-19
BR112014019240A8 (pt) 2017-07-11
US20150293325A1 (en) 2015-10-15
EP2816384A1 (en) 2014-12-24
EP2816384A4 (en) 2015-11-11
CN104115049A (zh) 2014-10-22
JP2013171072A (ja) 2013-09-02
BR112014019240A2 (https=) 2017-06-20

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