WO2023075483A1 - 광케이블 - Google Patents
광케이블 Download PDFInfo
- Publication number
- WO2023075483A1 WO2023075483A1 PCT/KR2022/016643 KR2022016643W WO2023075483A1 WO 2023075483 A1 WO2023075483 A1 WO 2023075483A1 KR 2022016643 W KR2022016643 W KR 2022016643W WO 2023075483 A1 WO2023075483 A1 WO 2023075483A1
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- WIPO (PCT)
- Prior art keywords
- optical
- cable
- tube member
- sectional area
- units
- Prior art date
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- 230000003287 optical effect Effects 0.000 title claims abstract description 367
- 239000013307 optical fiber Substances 0.000 claims abstract description 147
- 239000000463 material Substances 0.000 claims description 30
- 238000004519 manufacturing process Methods 0.000 claims description 25
- 239000011248 coating agent Substances 0.000 claims description 13
- 238000000576 coating method Methods 0.000 claims description 13
- 238000004078 waterproofing Methods 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 8
- 230000003014 reinforcing effect Effects 0.000 claims description 7
- 229920005672 polyolefin resin Polymers 0.000 claims description 6
- KAATUXNTWXVJKI-UHFFFAOYSA-N cypermethrin Chemical compound CC1(C)C(C=C(Cl)Cl)C1C(=O)OC(C#N)C1=CC=CC(OC=2C=CC=CC=2)=C1 KAATUXNTWXVJKI-UHFFFAOYSA-N 0.000 claims description 5
- 235000015110 jellies Nutrition 0.000 claims description 5
- 239000008274 jelly Substances 0.000 claims description 5
- 239000000843 powder Substances 0.000 claims description 5
- 230000001788 irregular Effects 0.000 claims description 4
- 239000003063 flame retardant Substances 0.000 claims description 3
- DXZMANYCMVCPIM-UHFFFAOYSA-L zinc;diethylphosphinate Chemical compound [Zn+2].CCP([O-])(=O)CC.CCP([O-])(=O)CC DXZMANYCMVCPIM-UHFFFAOYSA-L 0.000 claims description 3
- 230000004931 aggregating effect Effects 0.000 claims description 2
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- 230000000052 comparative effect Effects 0.000 description 15
- 230000015572 biosynthetic process Effects 0.000 description 8
- 229920002430 Fibre-reinforced plastic Polymers 0.000 description 3
- 238000004891 communication Methods 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 3
- 239000011151 fibre-reinforced plastic Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000000835 fiber Substances 0.000 description 2
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Images
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
- G02B6/44—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
-
- 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
- G02B6/441—Optical cables built up from sub-bundles
-
- 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
- G02B6/4479—Manufacturing methods of optical cables
- G02B6/448—Ribbon 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
- G02B6/4479—Manufacturing methods of optical cables
- G02B6/449—Twisting
-
- 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
- G02B6/443—Protective covering
- G02B6/4432—Protective covering with fibre reinforcements
- G02B6/4433—Double reinforcement laying in straight line with optical transmission element
Definitions
- the present invention relates to an optical cable. More specifically, the present invention secures waterproof performance while minimizing optical loss or degradation of optical properties when an optical cable is bent, compressed, or externally impacted, accommodates a plurality of optical fibers to minimize the outer diameter, and is variable in shape to drop droplets. It relates to an optical unit including a tube member capable of optimizing a rate and an optical cable having the optical unit.
- optical cable-based communication networks are also continuously increasing.
- the optical cable has a large bandwidth and a small weight and volume compared to the existing copper cable, so it is very advantageous in constructing a high-speed transmission network.
- an optical cable may include a plurality of optical units inside a cable jacket, and each optical unit may include a tube member in which a plurality of optical fibers are accommodated.
- Each optical unit accommodates a plurality of optical fibers inside the tube member included in the optical unit, and the plurality of optical fibers may be accommodated in the tube member in the form of individual optical fibers, but adjacent optical fibers of the plurality of optical fibers arranged side by side in the longitudinal direction.
- a structure in which a plurality of rollable optical fiber ribbons having a structure capable of being rolled in the width direction by combining at least a portion of the ribbons between them with a bonding material is accommodated in one tube member is also possible.
- the outer diameter of the large-capacity optical cable may eventually be determined according to the space ratio of the optical fiber inside the optical unit of the large-capacity optical cable.
- Increasing the space ratio inside the tube member of the optical unit can contribute to reducing the overall outer diameter of the optical cable. It is difficult to sufficiently secure waterproof performance, and in the case of bending, compression, or external impact of an optical cable, optical loss may increase or optical characteristics may deteriorate.
- the waterproofing performance is reduced because the waterproofing material does not sufficiently cover the empty space or gap inside the tube member, and the outer diameter of the optical cable increases.
- an optical cable capable of minimizing optical loss or deterioration of optical properties, securing waterproof performance of each optical unit, and minimizing an increase in the outer diameter of the optical cable is required.
- the present invention secures waterproof performance while minimizing optical loss or deterioration of optical properties when an optical cable is bent, compressed, or subjected to external impact, accommodates a plurality of optical fibers to minimize the outer diameter, and is variable in shape to optimize the occupancy rate.
- An object to be solved is to provide an optical cable having an optical unit including a tube member that can be configured.
- the present invention provides a plurality of optical units including a plurality of optical fibers and a tube member in which the optical fibers are accommodated; an optical cable core including; A cable jacket surrounding the optical cable core, wherein the tube member changes shape when accommodated in the cable jacket while the plurality of optical fibers are accommodated in the tube member, and the plurality of optical fibers have a length of 6 or more optical fibers A pair of adjacent optical fibers arranged side by side in the direction of each other are arranged in an optical fiber ribbon shape in which at least a portion thereof is bonded with a coupling material, and at least one or more of the optical fiber ribbons are disposed in a curved shape based on the cable cross section and accommodated in the tube member,
- Each of the plurality of optical units may provide an optical cable characterized in that the optical fiber inside the tube member has a spot rate of 68% to 83%.
- the optical fiber's occupancy rate may be 53% to 75%.
- the shape of the tube member of the light unit may be changed into an irregular shape corresponding to the shape of a space disposed in contact with the cable jacket.
- an empty space may be formed between a plurality of optical units in the cable jacket or between the cable jacket and the optical unit.
- each of the plurality of light units may have a different cross-sectional area.
- the tube member of the optical unit may be a shape-changing circular, elliptical or polygonal pipe, having a thickness of 0.1 mm to 0.5 mm, and a polyolefin-based resin material having a Shore D hardness of 20 to 40.
- the hardness of the sheath may be higher than that of the tube member.
- the elastic modulus of the sheath may be greater than the elastic modulus of the tube member.
- a waterproofing material may be included in the tube member of the light unit.
- a waterproofing material may be included between the cable jacket and the optical unit.
- the waterproof material may be one or more of waterproof powder, waterproof yarn, and waterproof jelly.
- a halogen-free flame retardant may be added to the polyolefin-based resin.
- the core may be formed by twisting a plurality of optical units at a predetermined pitch.
- the core may be configured by binding a plurality of light units with a binding member.
- a rip cord may be disposed between the inner circumferential surface of the cable jacket and the outer circumferential surface of the core.
- a plurality of reinforcing members in the form of wires made of FRP material may be embedded in the cable jacket at spaced apart or symmetrical positions in the longitudinal direction.
- the number of optical fibers accommodated in the tube member of one light unit may be 100 to 400.
- the number of optical units constituting the optical cable may be 20 or less.
- the optical fibers accommodated in the tube member of the optical unit may be a plurality of rollable optical fiber ribbons each composed of a plurality of optical fibers.
- the plurality of optical units may be bound with a binding member to constitute the optical cable core.
- the present invention includes a plurality of optical units including a tube member in which a plurality of optical fiber ribbons in which a plurality of optical fibers are intermittently bonded are accommodated; a cable jacket surrounding the plurality of optical units;
- the optical fiber spot rate of the optical unit before the cable jacket covers the plurality of optical units is 53% to 75%, and the optical fiber spot rate of the optical unit after the cable jacket wraps the plurality of optical units is 68% to 75%. It is possible to provide an optical cable characterized in that 83%.
- Optical fiber occupancy rate of optical unit Sum of cross-sectional areas of all optical fibers in tube member / Internal cross-sectional area of tube member * 100%
- the present invention includes a plurality of optical units including a tube member in which a plurality of optical fiber ribbons in which a plurality of optical fibers are intermittently bonded are accommodated; a cable jacket surrounding the plurality of optical units;
- the optical cable according to claim 1 wherein the deformation rate of the internal cross-sectional area of the tube member after the cable jacket wraps the plurality of optical units is 7% to 41% compared to the internal cross-sectional area of the tube member before the cable jacket wraps the plurality of optical units.
- the present invention comprises a rollable optical fiber ribbon manufacturing step of bonding a plurality of optical fibers side by side by forming a plurality of junctions at spaced positions between a plurality of adjacent optical fibers;
- the shape of the tube member constituting the optical unit is deformed so that the optical fiber inside the tube member may have a spot ratio of 68% to 83%.
- the shape of the tube member constituting the light unit is deformed, and the deformation rate of the cross-sectional area inside the light unit may be 7% to 41%.
- the optical cable core forming step may be formed by twisting and assembling the plurality of optical units at a predetermined pitch.
- the core forming step may be formed by assembling the plurality of optical units through a binding member.
- the present invention provides an optical unit manufacturing step of manufacturing individual optical units by extruding a tube member accommodating a plurality of optical fibers to have an internal spot rate of 53% to 75%;
- the shape of the tube member constituting the optical unit is deformed so that the optical fiber inside the tube member may have a spot ratio of 68% to 83%.
- the shape of the tube member constituting the light unit is deformed, and the deformation rate of the cross-sectional area inside the light unit may be 7% to 41%.
- the optical cable core is configured to include a plurality of optical units, and the diameter of the optical cable can be minimized by limiting the optical fiber spot rate to an appropriate range while the optical unit is accommodated in the optical cable.
- the optical cable according to the present invention it is possible to provide sufficient waterproof performance while preventing excessive use of a waterproofing material by limiting the space ratio of the optical unit included in the optical cable core to an appropriate range.
- the space ratio of the optical unit included in the optical cable core is changed to an appropriate range, so that when the optical cable is bent, compressed, or an external impact is applied, optical loss or optical characteristic deterioration can be minimized.
- FIG. 1 is a cross-sectional view of an optical unit in which tube member tubing is completed in a process of manufacturing an optical unit of an optical cable according to the present invention.
- FIG. 2 is a cross-sectional view of one embodiment of an optical cable constructed by accommodating the optical unit shown in FIG. 1 inside a cable jacket.
- FIG. 3 shows a cross-sectional view of another embodiment of an optical cable according to the present invention.
- FIG. 1 shows a cross-sectional view of an optical unit 10' in which tube member tubing is completed in the process of manufacturing an optical unit of an optical cable according to the present invention
- FIG. 2 shows the optical unit 10 shown in FIG. It shows a cross-sectional view of one embodiment of an optical cable configured as follows.
- the optical cable 100 relates to a large-capacity optical cable having, for example, 864, 1728, 3456 or 6912 optical fibers 11, and when bending, compression or external impact is applied, optical loss or optical It is characterized by having a structure capable of securing waterproof performance while minimizing deterioration of properties and minimizing the outer diameter.
- a plurality of optical units 10 each containing a plurality of optical fibers 11 are configured, and the plurality of optical units 10 are assembled again. and cover the cable jacket 80 to configure the optical cable 100.
- the optical cable 100 includes a plurality of optical units 10 composed of a plurality of optical fibers 11 and a tube member 20 in which the optical fibers 11 are accommodated; an optical cable core including (C ); and a cable jacket 80 surrounding the optical cable core, and the length of the tube member 20 when placed inside the cable jacket 80 in a state where the plurality of optical fibers 11 are accommodated in the tube member 20
- the shape of the cross section is changed in the direction and the spot ratio of the optical fiber 11 inside the tube member 20 of the optical unit 10 is changed.
- 144 optical fibers 11 are accommodated in a circular tube member 20, and the 144 optical fibers 11 are composed of 12 optical fibers 11 and can roll in the width direction. It can be composed of 12 rollable ribbons, and the number of optical fibers 11 constituting one rollable optical fiber ribbon 15 accommodated inside the tube member 20 constituting the optical unit 10 or optical unit The number of (10) can be increased or decreased. Preferably, the number of optical fibers 11 constituting one rollable optical fiber ribbon 15 is 6 or more.
- the rollable optical fiber ribbon 15 since the rollable optical fiber ribbon 15 is configured to be rolled in the width direction, it may be disposed in a curved shape based on the cable cross section and accommodated in the tube member 20 . As shown in FIG. 1, when the center of each adjacent optical fiber included in the rollable optical fiber ribbon 15 is connected based on the cable cross section, a curve (CV) form is formed, thereby reducing empty space in the tube member 20 and providing a plurality of The rollable optical fiber ribbon 15 can be accommodated, and thus the optical fiber spot rate of the optical unit can be smoothly controlled.
- CV curve
- the optical unit 10' is manufactured through an optical unit manufacturing step of manufacturing individual optical units by extruding a tube member so that each rollable optical fiber ribbon 15 is accommodated therein and the internal occupancy rate is 53% to 75%. can be manufactured.
- each optical unit 10 may constitute an optical unit 10 by including one or more rollable optical fiber ribbons 15, and each rollable optical fiber ribbon 15 includes a plurality of optical fibers 11 It refers to an assembly of optical fibers 11 that are joined side by side in the width direction but are configured to be rolled in the width direction, and the optical units 10 constitute a large-capacity optical cable 100 because the optical fibers 11 are not separated even in a rolled state. It can be applied to increase the space rate of
- the rollable optical fiber ribbon 15 is a roller for bonding a plurality of optical fibers side by side by forming a plurality of junctions at spaced positions between a plurality of adjacent optical fibers 11 through a bonding material such as UV curable acrylate resin. It can be manufactured through a black optical fiber ribbon manufacturing step.
- each optical unit 10 can be increased or decreased, and the optical unit 10 accommodates or collects a general optical fiber ribbon or a plurality of optical fibers other than the rollable ribbon in a collecting means.
- the tube member 20 of the light unit 10 is formed in the form of a circular, elliptical or polygonal pipe with a thickness of 0.1 millimeter (mm) to 0.5 millimeter (mm) in the tubing step of a plurality of optical fibers, and the tube member 20 ) may be a polyolefin-based resin material that is lightweight while having heat resistance and can provide transparency as needed, and is composed of a material having a hardness of about 20 to 40 Shore D, so that when an external force or compressive force is applied, the shape is not broken It can be made of this variable material.
- flame retardancy may be reinforced by adding a halogen-free flame retardant to the polyolefin-based resin.
- a waterproof material such as waterproof powder, waterproof yarn, or waterproof jelly may be added to the inside of the tube member 20 constituting the light unit 10' to provide waterproof performance.
- Such an optical unit 10' may have a spot ratio of about 53% to 75% in a state where the optical fiber 11 is accommodated therein.
- the space ratio inside the optical unit 10 'manufactured through the tube member tubing process in the optical unit manufacturing step is the space ratio before the optical cable core formation step through the assembly of a plurality of optical units, and there is a relatively empty space inside the tube member. Since it is formed leisurely, an empty space can be provided in which a waterproofing material or the like can be evenly applied to the inside of the tube member during the tubing process of the tube member.
- the optical unit 10' may be configured to include a plurality of rollable optical fiber ribbons, or may be configured in such a way that a plurality of optical fibers are accommodated inside a tube member. Even in this case, it is the same that the plurality of optical fibers accommodated inside the tube member are configured to have a spot rate of 53% to 75%.
- such an area ratio can be prepared for shape changes such as compression or crushing of a tube member of a circular pipe-shaped optical unit by a compressive force applied in an optical cable core forming step or a cable jacket covering step. That is, the light unit may be manufactured by reflecting in advance a decrease in the space factor generated in the process of changing the shape of the tube member in the light unit manufacturing step.
- the state of the tube member of the optical unit is defined as a state in which the shape is not changed before the optical cable core forming step, and a state in which the shape is changed after the cable jacket coating step through the core forming step.
- the spotting ratio increases, and thus increasing the spotting ratio inside the tube member 20 of the optical unit 10 can contribute to reducing the overall outer diameter of the optical cable 100.
- waterproof materials such as waterproof powder, waterproof yarn, or waterproof jelly filled in the tube member 20 for waterproofing are not evenly distributed between the optical fibers 11, so it is difficult to sufficiently secure waterproof performance when moisture penetrates In the case of bending, compression, or external impact of the optical cable 100, optical loss may increase or optical characteristics may be deteriorated.
- the empty space inside the tube member 20 is excessive, so that the waterproofing material injected into the tube member 20 sufficiently fills the empty space or gap inside the tube member 20. It is the same that the waterproof performance is lowered because the cover is not covered, and the outer diameter of the optical cable 100 is increased as described above.
- the optical cable 100 according to the present invention has a longitudinal direction when the tube member 20 of the optical unit 10 is accommodated inside the cable jacket 80 in a state where a plurality of optical fibers 11 are accommodated inside the tube member 20.
- the shape of the cross-sectional area is changed, and accordingly, the spot ratio of the optical fiber 11 inside the tube member 20 of the optical unit 10 is changed.
- the optical cable 100 according to the present invention shown in FIG. 2 shows an optical cable 100 in which one optical unit 10 is disposed in the center of the optical cable 100 and five optical units 10 are disposed around the periphery. .
- the optical cable 100 according to the present invention when the optical unit 10 shown in FIG. 1 is accommodated inside the cable jacket 80 to form the optical cable 100, is determined by the shape of the space on the inner surface of the cable jacket 80.
- the shape of the tube member 20 may be changed.
- the cross-sectional shape is changed in the longitudinal direction, and the optical unit 10 ) has a feature that the spot ratio of the optical fiber 11 inside the tube member 20 is changed.
- the 'spot rate' inside the optical unit 10 means the ratio (%) of the total area of the optical fibers included inside the tube member 20 to the cross-sectional area inside the tube member 20 .
- the tube member 20 constituting the optical unit 10 may remain circular in a tubing state in which an optical fiber ribbon 15 or the like is accommodated, but if the thickness is thin or the sheath It is made of a material with low hardness, low modulus of elasticity, or flexibility, and can be varied in shape to an irregular shape corresponding to the shape of a space disposed in contact with the cable jacket 80.
- An optical cable core is formed through an optical cable core forming step of twisting and assembling a plurality of optical units 10′ shown in FIG. 1 at a predetermined pitch, an optical cable core is supplied, and a cable jacket coating step of covering the cable jacket is performed.
- An optical cable can be manufactured.
- the shape can be deformed into an irregular shape corresponding to the shape of the space in contact with it.
- the tube members 20 of the six light units 10 shown in FIG. 2 are naturally distorted and changed in shape due to interference with surrounding objects according to their respective positions, and the optical fibers inside the light unit 10 at that time ( 11) The drop rate increases.
- the optical fiber 11 may have an area occupancy rate in the range of 68% to 83%.
- the diameter or thickness of the tube member 20 was determined so that the occupancy rate was in the range of 68% to 83% after the optical unit 10 was accommodated inside the optical cable jacket 80 and the shape was changed. .
- the shape of the tube member constituting the optical unit is deformed so that the deformation rate of the internal cross-sectional area of the optical unit may be 7% to 41%.
- the strain of the cross-sectional area inside the light unit can be calculated as follows.
- the deformation rate of the internal cross-sectional area of the optical unit is the same both when the rollable optical fiber ribbon is accommodated in the tube member constituting the optical unit and when a plurality of optical fibers are accommodated.
- the tube member 20 constituting the optical unit 10 is thin or made of a flexible material compared to the sheath.
- the optical unit 10 is accommodated inside the optical cable 100.
- the diameter and thickness of the tube member 20 are set to increase, the shape naturally changes according to the shape of the space allocated to the optical unit 10 among the empty spaces inside the cable jacket 80, and the optical fiber inside ( 11) The drop rate may increase.
- the size of the tube member 20 is set so that the occupancy rate of the light unit 10 shown in FIG. 1, that is, the occupancy rate in the tubing step before the shape is changed inside the cable jacket 80 is 68% to 83%
- the space rate becomes 83% or more, so that the waterproofing material is not evenly distributed, and light loss during bending of the cable occurs. may occur.
- the light unit 10 is configured such that the internal occupancy rate of the light unit 10 is 68% to 83% for waterproof performance or light characteristics during bending, but the shape of the tube member 20 is not changed, the light Problems such as deterioration of characteristics or deterioration of waterproof performance do not occur, but the outer diameter of the cable greatly increases, making it impossible to reduce the diameter of the optical cable.
- the plurality of light units 10 as described above may be twisted at a predetermined pitch or assembled through a binding tape 50 as a binding member or binder to form a cable core C.
- the binding member may be in the form of a tape or a binding yarn.
- the core C of the optical cable 100 may be coated with a cable jacket 80 to form the optical cable 100 .
- a rip cord 60 for removing the cable jacket 80 may be provided between the binding tape 50 and the cable jacket 80 .
- the rip cord 60 may be provided to escape the cable jacket 80 when the optical cable 100 is connected.
- the rip cord 60 may be configured in the form of a fiber, and may be provided in one location or a pair in a symmetrical position as shown in FIG. 2 .
- At least one reinforcing member 70 for rigidity reinforcement may be provided inside the cable jacket 80 to reinforce tensile strength or tensile strength of the optical cable 100 .
- the reinforcing member 70 may be configured in the form of a wire made of a material such as fiber-reinforced plastic (FRP), and when the cable jacket 80 is extruded, the length direction of the optical cable 100 is adjusted so as to be buried inside the cable jacket 80. may be provided accordingly.
- FRP fiber-reinforced plastic
- Such an optical cable includes a rollable optical fiber ribbon manufacturing step of bonding a plurality of optical fibers side by side by forming a plurality of junctions at spaced positions between a plurality of adjacent optical fibers; An optical unit manufacturing step of manufacturing individual optical units by extruding a tube member so that a plurality of rollable optical fiber ribbons are accommodated therein and an internal occupancy rate is 53% to 75%; An optical cable core forming step of twisting and gathering a plurality of optical units at a predetermined pitch; It may be manufactured through an optical cable manufacturing method including a cable jacket coating step of supplying the optical cable core formed in the optical cable core forming step and covering the cable jacket.
- the shape of the tube member constituting the optical unit is deformed so that the occupancy rate of the optical fiber inside the tube member can be 68% to 83%, and the deformation rate of the internal cross-sectional area of the optical unit is 7%. to 41% as described above.
- optical cable 100 shown in FIG. 2 12 optical fiber ribbons 15 composed of 12 optical fibers 11 constitute one optical unit 10, and 6 optical units 10 constitute one optical cable 100.
- 6 optical units 10 constitute one optical cable 100.
- a high-capacity optical cable having various number of cores can be configured as follows.
- the number of cores of optical fibers accommodated in one optical unit and the number of optical units constituting one optical cable can be increased or decreased.
- FIG. 3 shows a cross-sectional view of another embodiment of an optical cable 100 according to the present invention.
- 12 optical fiber ribbons 15 composed of 12 optical fibers 11 constitute one optical unit 10
- 6 optical units 10 constitute one optical cable 100.
- 16 optical fiber ribbons 15 composed of 12 optical fibers 11 constitute one optical unit 10
- 4 optical units 10 are placed in the center of the optical unit ( 10)
- the internal space of the optical cable 100 is divided into four parts and provided in one optical cable 100 constitutes a large-capacity optical cable 100 with a total of 768 core wires is shown.
- the reinforcing members 70 provided in the cable jacket 80 are provided at opposite positions, unlike the reinforcing members 70 in the embodiment shown in FIG. 2 . In this way, it is possible to provide sufficient tensile force while minimizing the thickness occupied by the reinforcing member by adjusting the number and diameter.
- the number of optical units constituting the optical cable and the number of optical fibers or optical fiber ribbons accommodated in each optical unit are configured in various combinations to form a large-capacity optical cable.
- the optical cable 100 according to the present invention shown in FIGS. 2 and 3 having such a structure has waterproof performance while minimizing light loss or deterioration of optical properties when bending, compression, or external impact of the optical cable 100 is applied. , accommodates a plurality of optical fibers 11 so as to minimize the outer diameter, and is variable in shape, thereby optimizing the spot ratio.
- Table 1 below shows the change rate of the internal cross-sectional area of the optical unit according to the change of the optical fiber occupancy rate (%) inside the optical unit before and after the core formation of various examples and comparative examples, and the waterproof characteristics and optical characteristics test results.
- the optical characteristics evaluation in Table 1 is an optical signal loss test at 1550 nm wavelength at room temperature (23 ° C) after core formation (shape change). was performed, and the quality was judged by evaluating whether the loss value was 0.35 dB/km or less.
- optical fiber occupancy rate inside the optical unit after core formation (shape change) [% ] was measured as 68[%], 75[%], and 83[%], respectively, and the optical fiber occupancy ratio inside the optical unit after the above-mentioned core formation satisfies the range of 68% to 83%, so both waterproof and optical characteristics are good. was able to confirm that
- Comparative Example 3 and Comparative Example 4 the light unit occupancy rate before the shape change was within the normal range, but in Comparative Example 3, the light unit occupancy rate after the shape change was 65[%], which was lower than the proper occupancy rate, and the empty space inside the tube member was too large.
- the waterproof performance was poor because the space that the waterproof material could not cover was large, and in Comparative Example 4, the occupancy rate was higher than the proper occupancy rate after the shape change, so that the optical properties of the optical fiber accommodated inside the tube member were deteriorated due to pressure from the tube member or between the optical fibers.
- Comparative Examples 5 and 6 the light unit occupancy ratio before and after the shape change was within the normal range, but in Comparative Example 5, the change rate of the internal cross-sectional area before and after the shape change was lower than the normal range, between the jacket and the light unit or between the light units.
- the waterproof properties were unsatisfactory due to the wide empty space formed by insufficient waterproof members, and in Comparative Example 6, the change rate of the internal cross-sectional area before and after the shape change was higher than the normal range, so that the tube member was greatly deformed from the original shape, and the optical properties were deteriorated by pressing the optical fiber. Confirmed.
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Abstract
Description
실시 예1 |
실시예2 | 실시 예3 |
비교예1 | 비교예2 | 비교예3 | 비교예4 | 비교예5 | 비교예6 | |
코어 형성 전 광유닛 내부 광섬유 점적율 [%] | 53 |
64 |
75 |
49 |
77 |
58 |
70 |
74 |
55 |
코어 형성 후 광유닛 내부 광섬유 점적율 [%] | 68 |
75 |
83 |
67 |
84 |
65 |
86 |
79 |
78 |
광유닛 내부 단면적 변화율 [%] | 28.3 |
17.2 |
10.7 |
36.7 |
9.1 |
12.1 |
22.9 |
6.8 |
41.8 |
방수특성 | O | O | O | X | X | X | O | X | O |
광특성 | O | O | O | O | X | O | X | O | X |
Claims (30)
- 복수 개의 광섬유 및 상기 광섬유가 수용되는 튜브부재를 포함하는 복수 개의 광유닛;을 포함하는 광케이블 코어; 및,상기 광케이블 코어를 감싸는 케이블 자켓;을 포함하고,상기 튜브부재는 상기 튜브부재 내부에 복수 개의 광섬유가 수용된 상태로 케이블 자켓 내부에 수용 시 형상이 변경되며,상기 복수 개의 광섬유는 6개 이상의 광섬유가 길이방향으로 나란히 배치되어 각각 인접한 한 쌍의 광섬유가 결합 물질로 적어도 일부분이 접합된 광섬유 리본 형상을 포함하고,상기 튜브부재 내에 적어도 하나 이상의 상기 광섬유 리본이 케이블 단면 기준으로 곡선 형태로 배치되어 수용되고,상기 복수 개의 광유닛 각각은 튜브부재 내부의 광섬유의 점적율이 68% 내지 83%인 것을 특징으로 하는 광케이블.
- 제1항에 있어서,상기 광유닛의 형상 변경 전 광섬유의 점적율은 53% 내지 75%인 것을 특징으로 하는 광케이블.
- 제1항에 있어서,상기 광유닛의 튜브부재는 상기 케이블 자켓 내에서 접하여 배치되는 공간의 형상에 대응하여 부정형 형상으로 형상이 변경되는 것을 특징으로 하는 광케이블.
- 제1항에 있어서,상기 케이블 자켓 내 복수개의 광유닛 사이 또는 상기 케이블 자켓과 상기 광유닛 사이에 빈 공간이 형성되는 것을 특징으로 하는 광케이블.
- 제1항에 있어서,상기 복수개의 광유닛는 각각 단면적이 상이한 것을 특징으로 하는 광케이블.
- 제1항에 있어서,상기 광유닛의 튜브부재는 형상 가변전 원형, 타원형 또는 다각형 파이프 형태로 두께는 0.1 밀리미터 내지 0.5 밀리미터이며, 쇼어 D 경도 20 내지 40인 폴리올레핀계 수지 재질인 것을 특징으로 하는 광케이블.
- 제1항에 있어서,상기 시스의 경도가 상기 튜브부재의 경도 보다 높은 것을 특징으로 하는 광케이블.
- 제1항에 있어서,상기 시스의 탄성계수가 상기 튜브부재의 탄성계수 보다 큰 것을 특징으로 하는 광케이블.
- 제1항에 있어서,상기 광유닛의 튜브부재 내에 방수재가 포함되는 것을 특징으로 하는 광케이블.
- 제1항에 있어서,상기 케이블 자켓과 상기 광유닛 사이에 방수재가 포함되는 것을 특징으로 하는 광케이블.
- 제9항 또는 제10항에 있어서,상기 방수재는 방수 파우더, 방수 얀, 방수 젤리 중 하나 이상인 것을 특징으로 하는 광케이블.
- 제6항에 있어서,상기 폴리올레핀계 수지는 할로겐 프리 난연재가 첨가되는 것을 특징으로 하는 광케이블.
- 제1항에 있어서,상기 코어는 복수개의 광유닛을 미리 결정된 피치로 꼬아 형성하는 것을 특징으로 하는 광케이블.
- 제1항에 있어서,상기 코어는 복수개의 광유닛을 바인딩 부재로 바인딩하여 구성하는 것을 특징으로 하는 광케이블.
- 제1항에 있어서,상기 케이블 자켓 내주면 및 상기 코어 외주면 사이에 립코드가 배치되는 것을 특징으로 하는 광케이블.
- 제1항에 있어서,상기 케이블 자켓 내부에 길이 방향으로 FRP 재질의 와이어 형태의 복수 개의 보강부재가 이격된 또는 대칭되는 위치에 매립되는 것을 특징으로 하는 광케이블.
- 제1항에 있어서,하나의 광유닛의 튜브부재에 수용된 광섬유는 100개 내지 400개인 것을 특징으로 하는 광케이블.
- 제17항에 있어서,상기 광케이블을 구성하는 광유닛의 개수는 20개 이하인 것을 특징으로 하는 광케이블.
- 제17항에 있어서,상기 광유닛의 튜브부재에 수용되는 광섬유는 각각 복수 개의 광섬유로 구성되는 복수 개의 롤러블 광섬유 리본인 것을 특징으로 하는 광케이블.
- 제1항에 있어서,복수 개의 광유닛은 바인딩 부재로 바인딩되어 상기 광케이블 코어를 구성하는 것을 특징으로 하는 광케이블.
- 복수개의 광섬유가 간헐적으로 접합된 복수 개의 광섬유 리본이 수용되는 튜브부재를 포함하는 복수 개의 광유닛; 및,상기 복수개의 광유닛을 감싸는 케이블 자켓;을 포함하고,상기 케이블 자켓이 상기 복수개의 광유닛을 감싸기 이전의 광유닛의 광섬유 점적율은 53% 내지 75% 이고,상기 케이블 자켓이 상기 복수개의 광유닛을 감싼 이후의 광유닛의 광섬유 점적율은 68% 내지 83%인 것을 특징으로 하는 광케이블.- 광유닛의 광섬유 점적율 = 튜브부재 내 모든 광섬유의 단면적의 합 / 튜브부재 내부 단면적 * 100%
- 복수개의 광섬유가 간헐적으로 접합된 복수 개의 광섬유 리본이 수용되는 튜브부재를 포함하는 복수 개의 광유닛; 및,상기 복수개의 광유닛을 감싸는 케이블 자켓;을 포함하고,상기 케이블 자켓이 상기 복수개의 광유닛을 감싸기 이전의 튜브부재 내부 단면적 대비 상기 케이블 자켓이 상기 복수개의 광유닛을 감싼 이후의 튜브부재 내부 단면적의 변형율은 7% 내지 41%인 것을 특징으로 하는 광케이블.- 광유닛 내부 단면적의 변형율 = (|케이블 자켓이 감싼 후 튜브부재 내부 단면적 - 케이블 자켓이 감싸기 전 튜브부재 내부 단면적|) / 케이블 자켓이 감싸기 전 튜브부재 내부 단면적 * 100%
- 복수의 인접한 광섬유 사이의 이격된 위치에 다수의 접합부를 형성하는 방법으로 복수 개의 광섬유를 나란하게 접합하는 롤러블 광섬유 리본 제조단계;복수 개의 롤러블 광섬유 리본이 내부에 수용되고 내부 점적율이 53% 내지 75%이 되도록 튜브부재를 압출하여 개별 광유닛을 제조하는 광유닛 제조단계;복수 개의 광유닛을 집합하는 광케이블 코어 형성단계; 및,상기 광케이블 코어 형성단계에서 형성된 광케이블 코어를 공급하며 케이블 자켓을 피복하는 케이블 자켓 피복단계;를 포함하는 광케이블 제조방법.
- 제23항에 있어서,상기 케이블 자켓 피복단계에서 상기 광유닛을 구성하는 튜브부재가 형상이 변형되어 튜브부재 내부의 광섬유의 점적율이 68% 내지 83% 인 것을 특징으로 하는 광케이블 제조방법.
- 제23항에 있어서,상기 케이블 자켓 피복단계에서 상기 광유닛을 구성하는 튜브부재가 형상이 변형되어 광유닛 내부 단면적의 변형율은 7% 내지 41%인 것을 특징으로 하는 광케이블 제조방법.- 광유닛 내부 단면적의 변형율 = (변형전 광유닛 내부 단면적 - 변형후 광유닛 내부 단면적) / 변형전 광유닛 내부 단면적 * 100%
- 제23항에 있어서,상기 광케이블 코어 형성단계는 상기 복수 개의 광유닛을 미리 결정된 피치로 꼬아 집합하여 형성하는 것을 특징으로 하는 광케이블 제조방법.
- 제23항에 있어서,상기 코어 형성단계는 상기 복수 개의 광유닛을 바인딩 부재를 통해 집합하여 형성하는 것을 특징으로 하는 광케이블 제조방법.
- 복수의 광섬유를 내부 점적율이 53% 내지 75%이 되도록 수용하는 튜브부재를 압출하여 개별 광유닛을 제조하는 광유닛 제조단계;복수 개의 광유닛을 미리 결정된 피치로 꼬아 집합하는 광케이블 코어 형성 단계; 및,상기 광케이블 코어 형성단계에서 형성된 광케이블 코어를 공급하며 케이블 자켓을 피복하는 케이블 자켓 피복단계;를 포함하는 광케이블 제조방법.
- 제28항에 있어서,상기 케이블 자켓 피복단계에서 상기 광유닛을 구성하는 튜브부재가 형상이 변형되어 튜브부재 내부의 광섬유의 점적율이 68% 내지 83% 인 것을 특징으로 하는 광케이블 제조방법.
- 제28항에 있어서,상기 케이블 자켓 피복단계에서 상기 광유닛을 구성하는 튜브부재가 형상이 변형되어 광유닛 내부 단면적의 변형율은 7% 내지 41%인 것을 특징으로 하는 광케이블 제조방법.- 광유닛 내부 단면적의 변형율 = (변형전 광유닛 내부 단면적 - 변형후 광유닛 내부 단면적) / 변형전 광유닛 내부 단면적 * 100%
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Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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KR20120081817A (ko) * | 2011-01-12 | 2012-07-20 | 엘에스전선 주식회사 | 공기압 포설용 다심 광케이블 |
JP2015517679A (ja) * | 2012-05-02 | 2015-06-22 | エーエフエル・テレコミュニケーションズ・エルエルシー | リボン型光ファイバー構造体を有する円形で小径の光ケーブル |
KR20190018704A (ko) * | 2016-08-04 | 2019-02-25 | 가부시키가이샤후지쿠라 | 광섬유 케이블 |
KR20210014166A (ko) * | 2018-10-11 | 2021-02-08 | 가부시키가이샤후지쿠라 | 광섬유 케이블 |
KR20210086206A (ko) * | 2019-12-31 | 2021-07-08 | 대한광통신 주식회사 | 롤러블 리본 광섬유 및 그 제조방법 |
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KR20120081817A (ko) * | 2011-01-12 | 2012-07-20 | 엘에스전선 주식회사 | 공기압 포설용 다심 광케이블 |
JP2015517679A (ja) * | 2012-05-02 | 2015-06-22 | エーエフエル・テレコミュニケーションズ・エルエルシー | リボン型光ファイバー構造体を有する円形で小径の光ケーブル |
KR20190018704A (ko) * | 2016-08-04 | 2019-02-25 | 가부시키가이샤후지쿠라 | 광섬유 케이블 |
KR20210014166A (ko) * | 2018-10-11 | 2021-02-08 | 가부시키가이샤후지쿠라 | 광섬유 케이블 |
KR20210086206A (ko) * | 2019-12-31 | 2021-07-08 | 대한광통신 주식회사 | 롤러블 리본 광섬유 및 그 제조방법 |
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