WO2022270706A1 - 광케이블 - Google Patents
광케이블 Download PDFInfo
- Publication number
- WO2022270706A1 WO2022270706A1 PCT/KR2022/001031 KR2022001031W WO2022270706A1 WO 2022270706 A1 WO2022270706 A1 WO 2022270706A1 KR 2022001031 W KR2022001031 W KR 2022001031W WO 2022270706 A1 WO2022270706 A1 WO 2022270706A1
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- WIPO (PCT)
- Prior art keywords
- optical fiber
- optical
- fiber bundle
- tube member
- optical cable
- Prior art date
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- 230000003287 optical effect Effects 0.000 title claims abstract description 112
- 239000013307 optical fiber Substances 0.000 claims abstract description 255
- 238000001125 extrusion Methods 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 230000004931 aggregating effect Effects 0.000 claims description 2
- 238000005452 bending Methods 0.000 abstract description 19
- 230000006378 damage Effects 0.000 abstract description 5
- 230000035882 stress Effects 0.000 abstract 1
- 238000004891 communication Methods 0.000 description 6
- 239000000835 fiber Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 230000014509 gene expression Effects 0.000 description 2
- 239000011247 coating layer Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 239000007779 soft material Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—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
- G02B6/4434—Central member to take up tensile loads
-
- 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
- G02B6/441—Optical cables built up from sub-bundles
- G02B6/4413—Helical 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
- G02B6/4479—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
Definitions
- the present invention relates to an optical cable.
- the present invention is an optical cable in which an optical fiber bundle in which a plurality of optical fibers are aggregated or bundled is accommodated in a tube member, and the optical fiber bundle is formed by modeling considering the bending characteristics of the optical cable or the lossless radius of curvature of the optical fibers constituting the optical fiber bundle. It relates to an optical cable having an excess group length (EGL) of an optical fiber capable of minimizing stress, damage or light loss of an optical fiber.
- ETL excess group length
- FIG. 1 shows a cross-sectional view of one example of an optical cable having a plurality of tube members 20 in which a plurality of optical fibers 11 are accommodated
- FIG. 2 shows a tube member 20′ in which a plurality of optical fibers 11 are accommodated.
- a cross-sectional view of another example of the provided optical cable is shown.
- the large-capacity multi-core optical cable is composed of a plurality of optical units 15 and 15' configured by receiving a plurality of optical fibers 11 inside tube members 20 and 20'. It can be.
- a plurality of light units 15 and 15' may be provided in the cable jacket 50, and may be arranged in a circumferential direction along the circumference of the central tension line 30 as shown in FIGS. 1 and 2. , the central tension line may be omitted.
- the central tension line 30 may include a core 31 made of glass-reinforced fibers and a coating layer 33 surrounding the core.
- the optical unit may include tube members 20 and 20' and a plurality of optical fibers 11 inside the tube members 20 and 20', respectively. The number of optical fibers constituting each optical unit may reach hundreds. A plurality of optical fibers constituting each of the optical units 15 and 15' may constitute an aggregated or bundled bundle (hereinafter referred to as 'bundle 10').
- the plurality of optical units 15 and 15' are assembled with the binding tape 40 and covered with the cable jacket 50 to provide a large-capacity optical cable.
- the tube member 20 constituting the optical cable shown in FIG. 1 is made of a relatively hard material and has a sufficient thickness to protect the optical fiber, so that the shape of the tube member maintains a circular shape.
- the tube member 20' of the optical cable shown in Fig. 2 may be made of a relatively soft material in order to increase the occupancy rate inside the optical cable and facilitate cutting of the tube member in connection work. Therefore, the tube view material of the optical cable shown in FIG. 2 is deformed into a trapezoidal or fan-shaped shape inside the cable jacket, and the empty space inside the optical cable can be reduced.
- the optical fiber bundles are straight inside the tube members 20 and 20'. It is not arranged, but is provided longer than or equal to the length of the tube member to secure bending characteristics and prevent damage to the optical fiber, and is arranged in a spiral or curved shape inside the tube member. Due to such a structure, the optical cable has excellent bending characteristics and optical signal transmission characteristics can be secured
- the excess length (EGL) of the optical fiber bundle is longer than the appropriate excess length, the optical fiber bundle is excessively pressurized and accommodated in the tube member constituting the optical unit, and stress is applied to the optical fiber, thereby deteriorating the optical communication characteristics. A deterioration problem may occur.
- the excess length (EGL) of the optical fiber bundle relative to the length of the tube member constituting the optical cable is required, but needs to be set within an appropriate range.
- the present invention is an optical cable in which an optical fiber bundle in which a plurality of optical fibers are aggregated or bundled is accommodated in a tube member, and the optical fiber bundle is formed by modeling considering the bending characteristics of the optical cable or the lossless radius of curvature of the optical fibers constituting the optical fiber bundle.
- An object to be solved is to provide an optical cable having an optimized excess group length (EGL) of an optical fiber capable of minimizing stress, damage or light loss of the constituting optical fiber.
- the present invention is a plurality of optical fibers; and a tube member accommodating an optical fiber bundle formed by aggregating a plurality of the optical fibers, wherein a length of the optical fibers constituting the optical fiber bundle is greater than or equal to the length of the tube member, and the length of the tube member of the optical cable is The ratio ( ⁇ ) of the excess length of the optical fibers constituting the optical fiber bundle satisfies the following equation,
- R is the lossless radius of curvature of the optical fiber
- H is the reference diameter of the cross-sectional area of the optical cable of the spiral trajectory of the central point of the optical fiber bundle modeled in a circular cross section.
- a jacket surrounding the tube member may be additionally provided.
- the lossless radius of curvature of the optical fiber may be the maximum value among the lossless radius of curvature of the plurality of types of optical fibers.
- the plurality of optical fibers constituting the optical fiber bundle may include one or more rollable optical fiber ribbons.
- the number of tube members may be two or more.
- the plurality of tube members may be additionally provided with a central tension line in contact with and surrounding the outer circumferential surface.
- a binding member binding the plurality of tube members may be further provided, and the binding member may be disposed between the plurality of tube members and the jacket.
- the optical fibers constituting the rollable optical fiber ribbon may include one or more of G.652.D, G.657.A1, G.657.A2 and G.657.B3 optical fibers.
- the present invention is a central tension line; a plurality of optical fiber bundles formed by assembling a plurality of rollable optical fiber ribbons having a plurality of optical fibers; a plurality of tube members disposed around the central tension line and accommodating the optical fiber bundles; And, a jacket surrounding the plurality of the tube member; includes,
- R is the lossless radius of curvature of the optical fiber
- H can provide an optical cable characterized in that the cross-section is a reference diameter of the cross-sectional area of the optical cable of the spiral trajectory of the central point of the optical fiber bundle modeled in a circular cross-section.
- R is 40 mm when the type of optical cable constituting the rollable optical fiber ribbon is G.652.D, 30 mm when G.657.A1, 25 mm when G.657.A2, and G.657.B3. In this case, it may be 20 mm.
- the present invention is a method for manufacturing a multi-core optical cable, comprising the steps of assembling a plurality of rollable optical fiber ribbons to form an optical fiber bundle; forming a tube member surrounding the optical fiber bundle using a first extrusion molding device; Forming a light unit assembly by repeatedly twisting and collecting a plurality of tube members in the SZ direction around the central tension line using an assembly device and binding them with a binding member; forming a jacket covering the light unit assembly using a second extrusion molding device; Including, in the case of the pull-in speed V1 of the optical fiber bundle and the tube member extrusion speed V2 in the tube member forming step, the following equation is satisfied,
- R is the lossless radius of curvature of the optical fiber
- H is the reference diameter of the cross-sectional area of the optical cable of the spiral trajectory of the central point of the optical fiber bundle modeled in a circular cross section.
- the excess length (EGL) of the optical fiber bundle that can secure good optical communication characteristics from the bending radius of the optical fiber bundle derived through the three-dimensional space modeling of the optical fiber bundle spirally disposed on the inner circumferential surface of the tube member range can be determined.
- optical cable it is possible to determine the range of the optimal overlength of the optical fiber bundle according to the type of optical fibers constituting the optical fiber bundle.
- optical cable good bending characteristics and tensile characteristics of the optical cable can be secured by configuring the length of the optical fiber bundle disposed inside the tube member in an appropriate range compared to the length of the tube member constituting the optical cable.
- FIG. 1 shows a cross-sectional view of one example of an optical cable having a tube member accommodating a plurality of optical fibers
- FIG. 2 shows a cross-sectional view of another example of an optical cable having a tube member accommodating a plurality of optical fibers.
- FIG 3 shows a method for deriving the outer diameter of an optical fiber bundle according to the present invention.
- FIG. 4 shows a cross-sectional view of one example of an optical cable according to the present invention.
- FIG. 5 shows a perspective view of the optical cable shown in FIG. 3 in a perspective state.
- FIG. 6 shows a spiral laying trajectory (l) of the central point of an optical fiber when modeling in which an optical fiber bundle according to the present invention is spirally laid inside a tube member.
- FIG. 3 shows a method for deriving the outer diameter of an optical fiber bundle according to the present invention
- FIG. 4 shows a cross-sectional view of one example of an optical cable according to the present invention
- FIG. 5 is a perspective view of the optical cable shown in FIG. show
- an optical fiber bundle 10 configured by assembling a plurality of optical fibers 11 or optical fiber ribbons may be accommodated inside a tube member.
- a plurality of optical fibers 11 may be assembled in a bundle or bundled manner to form an optical fiber bundle 10, wherein the optical fiber bundle 10 has a flexible connection portion connecting a plurality of optical fibers forming a ribbon. It may be composed of a set of a plurality of rollable optical fiber ribbons formed of a material or structure capable of being rolled in the width direction of the ribbon.
- the rollable optical fiber ribbon may structurally have a characteristic of being rolled in the width direction by intermittently forming a connecting portion between optical fibers or forming a non-balanced coupling portion on one side of a plurality of optical fibers.
- Such an optical fiber bundle 10 is accommodated inside the tube member 20, and a curve that is not straight inside the tube member 20 to secure the bending characteristics of the optical cable 100 and prevent stress or optical loss of the optical fiber. It can be arranged or laid in a shape or spiral.
- the optical fiber bundle 10 may be composed of a plurality of optical fibers or optical fiber ribbons.
- the optimal range of the excess length (EGL) of the optical fiber bundle in a state where the optical fiber bundle 10 is accommodated inside the tube member may be determined according to the laying trajectory of the optical fiber bundle in the tube member, hereinafter, a larger than the outer diameter of the optical fiber bundle It is derived by modeling a shape in which an optical fiber bundle is laid inside a tube member having an inner diameter.
- the outer diameter D of the optical fiber bundle may be derived in the same manner as shown in FIG. 3 .
- the optical fiber bundle 10 when the optical fiber bundle 10 is composed of n individual optical fibers having an outer diameter d, the area of n squares having a side length d can be simplified to nd 2 , and the optical fiber bundle is a circular shape having an outer diameter D. If it is composed of ⁇ D 2 /4, the area of the circular optical fiber bundle can be determined as an area equivalent to the area of n optical fibers described above.
- Equation 1 the outer diameter D of the optical fiber bundle 10 can be simplified to Equation 1 below. That is, Equation 1 below can be derived from modeling in which an optical fiber bundle is formed in a circular shape and its area ( ⁇ D 2 /4) is equal to the sum of the areas of n squares each having a side length of d.
- the diameter (D) of the optical fiber bundle is derived from the diameter (d) of each optical fiber 11 and the number (n) of the optical fibers 11 constituting the optical fiber bundle, as shown in FIGS. 4 and 5 Similarly, modeling is performed by assuming that the optical fiber bundle 10 is laid inside the tube member 20 having an inner diameter ID.
- the spiral laying trajectory of the optical fiber bundle 10 inside the tube member 20 shown in FIGS. 4 and 5 is a spiral where the center point o of the cross section of the optical fiber bundle 10 is indicated by a circular arrow, as shown in FIG. It can be assumed that it is arranged along the laying trajectory, and the diameter of the cross-sectional spiral laying trajectory (hereinafter referred to as 'spiral diameter') of the optical fiber bundle 10 at this time is indicated as H, as shown in FIG. It can be.
- the spiral diameter may have a size equal to the difference between the inner diameter of the tube member 20 and the outer diameter of the optical fiber bundle 10 (ID-D).
- the length of the optical fiber bundle 10 should be longer than or equal to the length of the tube member 20, but should be considered to determine the optimal range.
- the longer the excess length of the optical fiber bundle 10 may be advantageous, but when the excess length of the optical fiber bundle 10 increases, the tube member ( 20) The radius of curvature of the spiral laying trajectory from the inside is reduced.
- the radius of curvature of the spiral laying trajectory of the optical fiber bundle 10 is reduced inside the tube member 20, when it is smaller than the minimum bending radius (MBR) of each optical fiber constituting the optical fiber bundle 10, the light Since loss and stress may be induced, the radius of curvature of the spiral laying trajectory inside the tube member 20 should not be smaller than the allowable radius of curvature R_min.
- FIG. 6 shows a spiral laying trajectory (l) of the center point of the optical fiber bundle when the optical fiber bundle 10 according to the present invention is spirally laid inside the tube member 20.
- the spiral diameter of the spiral laying trajectory l at the center point of the optical fiber is denoted by H as described above, and the period or pitch of the spiral laying trajectory l at the center point of the optical fiber at this time may be denoted by p.
- the radius of curvature of the spiral laying trajectory of the optical fiber bundle can be derived as shown in Equation 2 below by applying a vector function widely used to derive the radius of curvature of the spiral trajectory on a cylinder.
- Equation 2 shows that the length (L) of one cycle arc of the spiral laying trajectory (l) is a right triangle composed of the period (p) of the spiral laying trajectory (l) and the circumferential length ( ⁇ H) of the cylinder shown in FIG. It can be derived by assuming the length of the long side of
- the ratio ( ⁇ ) of the excess length in one cycle of the optical fiber bundles 10 spirally laid inside the tube member 20 may be defined by the fourth equation below.
- the length of the tube member 20 may correspond to the cycle p of the spiral laying trajectory l
- the ratio of the excess length of the optical fiber bundle 10 of one cycle spirally laid of the optical fiber bundle 10 ( ⁇ ) can be defined as the deviation of the length (L) of one cycle arc of the spiral laying trajectory (l) and the period (p) of the spiral laying trajectory (l) with respect to the period (p) of the spiral laying trajectory (l) .
- the period (p) of the spiral laying trajectory (l) is derived by converting the above Equation 1 into the 5th Equation below,
- Equation 6 the ratio ( ⁇ ) of the excess length to the length of the tube member 20 of the optical fiber bundle 10 can be organized by Equation 6 below, and the ratio ( ⁇ ) of the excess length in Equation 5 below is It can be confirmed that it can be organized into two variables: the radius of curvature (R) of (10) and the spiral diameter (H) of the spiral laying trajectory (l).
- the ratio of the excess length is proportional to the entire range of the optical cable 100, it is possible to determine the additional length of the optical fiber bundle 10 relative to the length of the tube member 20 constituting the optical cable 100.
- the radius of curvature R of the optical fiber bundle 10 is three-dimensional Although derived as a vector formula, since the radius of curvature R of the optical fiber bundle 10 can be limited to the allowable radius of curvature R_min of the optical fibers constituting the optical fiber bundle 10, the ratio of the excess length ⁇ is eventually It can be used as a criterion for determining the maximum value of the excess length of an optical fiber bundle. That is, when the radius of curvature R of the optical fiber is the allowable radius of curvature (R_min) of the optical fiber, the sixth equation is relationship must be satisfied.
- the maximum value of the ratio ⁇ of the excess length to the length of the tube member 20 of the optical fiber bundle 10 is the radius of curvature R of the optical fiber bundle 10 of the optical fibers constituting the optical fiber bundle 10. It may be determined as a value obtained by substituting the allowable radius of curvature (R_min).
- the present invention derived the allowable radius of curvature (R_min) of various optical fibers capable of constituting an optical fiber bundle through the following experiments.
- Table 1 shows that after winding an optical fiber 1000 times on a bobbin whose diameter is reduced in increments of 5 mm, an optical signal of 1625 nm wavelength from a light source is applied with a specific optical power at one end of the optical fiber, and the attenuation of the optical power is 0.0001 dB as a boundary
- the allowable radius of curvature was derived. Since it can be considered that optical loss does not occur due to optical fiber bending up to 0.0001 dB of optical power attenuation, the allowable radius of curvature can also be understood as a lossless radius of curvature.
- each allowable radius of curvature (R_min) according to the type of optical fibers constituting the rollable optical fiber ribbon or optical fiber bundle is 40 mm when the optical fiber is G.652.D and 40 mm when the optical fiber is G.657.A1. 30 mm for G.657.A2, 25 mm for G.657.A2, and 20 mm for G.657.B3.
- the excess length of the optical fiber bundle based on the largest lossless radius of curvature.
- the spiral diameter (H) of the spiral laying trajectory (l) may be the difference between the outer diameter (D) of the optical fiber bundle 10 in the inner diameter (ID) of the tube member 20 shown in FIG. same.
- Table 2 below is an example of deriving the maximum value of the excess length ratio ( ⁇ ) of an optical fiber bundle using Equation 6 when a G652.D optical fiber 288 core is spirally laid inside a tube member 20 having an inner diameter of 5 mm. .
- the maximum value of the ratio ( ⁇ ) of the excess length of the optical fiber bundle calculated through the above equation is 0.073%.
- the length of the optical fiber bundle requires an additional length of 0 to 730 mm, , In this case, if the optical fiber bundle has an excess length longer than 730 mm, it means that stress or light loss of the optical fiber may be caused rather due to the limitation of the allowable radius of curvature (R_min) of the optical fiber.
- the present invention can secure good bending characteristics, tensile characteristics and optical communication characteristics of the optical cable by configuring the length of the optical fiber bundle in an appropriate range relative to the length of the tube member constituting the optical cable.
- an optical unit may be configured to have a ratio of the excess length of the optical fiber bundle, and an optical cable as shown in FIGS. 1 and 2 may be configured.
- the present invention as shown in Figures 1 and 2, the central tension line; a plurality of optical units composed of an optical fiber bundle formed by assembling a plurality of rollable optical fiber ribbons having a plurality of optical fibers and a plurality of tube members and arranged around the central tension line; and a cable jacket surrounding the tube members of the plurality of optical units, wherein the ratio ( ⁇ ) of the excess length of the rollable optical fiber ribbon constituting the optical fiber bundle to the length of the tube members of the optical cable is Equation is satisfied, where R is the allowable radius of curvature (R_min) of the optical fiber, and H is the reference diameter of the optical cable cross-section area of the spiral trajectory of the central point of the optical fiber bundle modeled in a circular cross section (see FIG. 4) to provide an optical cable.
- R the allowable radius of curvature (R_min) of the optical fiber
- H is the reference diameter of the optical cable cross-section area of the spiral trajectory of the central point of the optical fiber bundle modeled in a circular cross section (see
- the present invention is a method for manufacturing a multi-core optical cable for manufacturing the above-described optical cable, comprising the steps of forming an optical fiber bundle by assembling a plurality of rollable optical fiber ribbons (S100); Extruding a tube member surrounding the optical fiber bundle using a first extrusion molding device (S200); Forming a light unit assembly by repeatedly twisting and collecting a plurality of tube members in the SZ direction around the central tension line using an assembly device and binding them with a binding member (S300); Forming a cable jacket covering the optical unit assembly by using a second extrusion molding device (S400); and extruding a tube member outside the optical fiber bundle (S200) at a pulling speed V1 of the optical fiber bundle.
- the tube member extrusion rate V2 the following equation 8 is satisfied,
- R is the allowable radius of curvature (R_min) of the optical fiber
- H may be the reference diameter of the cross-sectional area of the optical cable of the spiral trajectory of the central point of the optical fiber bundle modeled in a circular cross section.
- the optical cable according to the present invention may include a plurality of optical units as shown in FIGS. 1 and 2, and each optical unit has an excess length (EGL) of the optical fiber bundle inside the tube member. ) can be configured to have.
- ETL excess length
- an optical fiber bundle is first formed through a step of forming an optical fiber bundle by assembling a plurality of optical fibers, for example, a rollable optical fiber ribbon (S100), and a tube member is formed on the outside of the optical fiber bundle.
- An extruding step (S200) may be performed.
- the optical fiber bundle disposed in the tube member of the optical unit must have an excess length, which means that the length of the incoming optical fiber bundle must be longer than the length of the tube member, so extruding the tube member ( In S200), since the pull-in speed V1 of the optical fiber bundle must be greater than or equal to the tube member extrusion speed V2
- the relationship is established, and by the above equations 4 and 6
- the relationship is established, and at this time, when an optical fiber bundle of length L is introduced into the tube member of length p during ⁇ t time, Since the relationship of is established, the ratio ( ⁇ ) of the excess length to the length of the tube member 20 of the optical fiber bundle 10 in Expressions 4 and 6 is the pull-in speed V1 of the optical fiber bundle with respect to the extrusion speed V2 of the tube member It can be converted into Equation 9 below, which is a ratio.
- the allowable radius of curvature (R_min) according to the type of optical fibers constituting the rollable optical fiber ribbon or optical fiber bundle is 65 mm when the optical fiber is G.652.D, 50 mm when the optical fiber is G.657.A1, and G.657. 50mm for A2 and 35mm for G.657.B3 are the same as the description referring to Table 1.
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Abstract
Description
Claims (11)
- 제1항에 있어서,상기 튜브부재를 감싸는 자켓을 추가로 구비하는 것을 특징으로 하는 광케이블.
- 제1항에 있어서,상기 광섬유 번들이 복수 종류의 광섬유로 구성되는 경우, 상기 광섬유의 무손실 곡률반경은 복수 종류의 광섬유의 무손실 곡률 반경들 중 최대값인 것을 특징으로 하는 광케이블.
- 제1항에 있어서,상기 광섬유 번들을 구성하는 상기 복수 개의 광섬유는 하나 이상의 롤러블 광섬유 리본을 포함하는 것을 특징으로 하는 광케이블.
- 제2항에 있어서,상기 튜브부재는 2개 이상인 것을 특징으로 하는 광케이블.
- 제2항에 있어서,상기 복수개의 튜브부재가 외주면에 접하며 둘러싸는 중심인장선을 추가로 구비하는 것을 특징으로 하는 광케이블.
- 제6항에 있어서,상기 복수개의 튜브부재를 바인딩 하는 바인딩 부재가 추가로 구비되고,상기 바인딩 부재는 상기 복수개의 튜브부재와 상기 자켓 사이에 배치되는 것을 특징으로 하는 광케이블.
- 제4항에 있어서,상기 롤러블 광섬유 리본을 구성하는 광섬유는 G.652.D, G.657.A1, G.657.A2 및 G.657.B3 광섬유 중 하나 이상을 포함하는 것을 특징으로 하는 광케이블.
- 중심인장선;복수개의 광섬유를 구비하는 복수개의 롤러블 광섬유 리본을 집합하여 구성된 복수 개의 광섬유 번들;상기 중심인장선을 둘레에 배치되며, 각각 상기 광섬유 번들이 수용되는 복수 개의 튜브부재; 및,복수의 상기 튜브부재를 감싸는 자켓;을 포함하고,상기 광케이블의 튜브부재의 길이에 대한 상기 광섬유 번들을 구성하는 롤러블 광섬유 리본의 초과 길이의 비율(ε은 아래의 식을 만족하며,상기 식에서 R은 상기 광섬유의 무손실 곡률 반경이며,H는 단면이 원형으로 모델링 된 상기 광섬유 번들 중심점의 나선 궤적의 광케이블 단면적 기준 직경인 것을 특징으로 하는 광케이블.
- 제9항에 있어서,상기 R은 상기 롤러블 광섬유 리본을 구성하는 광케이블의 종류가 G.652.D일 경우 40mm, G.657.A1일 경우 30mm, G.657.A2일 경우 25mm, G.657.B3일 경우 20mm 인 것을 특징으로 하는 광케이블.
- 다심 광케이블의 제조방법으로서,복수개의 롤러블 광섬유 리본을 집합하여 광섬유 번들을 형성하는 단계;제1 압출 성형 장치를 사용하여 상기 광섬유 번들을 감싸는 튜브부재를 형성하는 단계;집합장치를 사용하여 중심인장선을 중심으로 복수개의 튜브부재가 SZ 방향으로 반복적으로 꼬이며 집합하고 바인딩 부재로 바인딩하여 광유닛 집합체를 형성하는 단계;제2 압출 성형 장치를 사용하여 상기 광유닛 집합체를 피복하는 자켓을 형성하는 단계; 를 포함하고,상기 튜브부재 형성 단계에서 광섬유 번들의 인입속도 V1, 튜브부재 압출속도 V2인 경우 아래 식을 만족하며,상기 식에서 R은 상기 광섬유의 무손실 곡률 반경이며,H는 단면이 원형으로 모델링 된 상기 광섬유 번들 중심점의 나선 궤적의 광케이블 단면적 기준 직경인 것을 특징으로 하는 다심 광케이블의 제조방법.
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Publication number | Priority date | Publication date | Assignee | Title |
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KR880000810A (ko) * | 1986-06-27 | 1988-03-29 | 엘리 와이스 | 응집된 클래딩 광섬유 케이블 |
KR20030068735A (ko) * | 2002-02-16 | 2003-08-25 | 삼성전자주식회사 | 광섬유 번들을 포함하는 광섬유 케이블 |
KR20120025163A (ko) * | 2010-09-07 | 2012-03-15 | 주식회사 옵토매직 | 공기압 포설용 광케이블의 방수 구조 |
KR101389592B1 (ko) * | 2012-11-16 | 2014-05-07 | 케이유피피(주) | 광케이블 보호관 |
KR20160092667A (ko) * | 2015-01-28 | 2016-08-05 | 엘에스전선 주식회사 | 리본 튜브형 광케이블 |
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Publication number | Priority date | Publication date | Assignee | Title |
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KR880000810A (ko) * | 1986-06-27 | 1988-03-29 | 엘리 와이스 | 응집된 클래딩 광섬유 케이블 |
KR20030068735A (ko) * | 2002-02-16 | 2003-08-25 | 삼성전자주식회사 | 광섬유 번들을 포함하는 광섬유 케이블 |
KR20120025163A (ko) * | 2010-09-07 | 2012-03-15 | 주식회사 옵토매직 | 공기압 포설용 광케이블의 방수 구조 |
KR101389592B1 (ko) * | 2012-11-16 | 2014-05-07 | 케이유피피(주) | 광케이블 보호관 |
KR20160092667A (ko) * | 2015-01-28 | 2016-08-05 | 엘에스전선 주식회사 | 리본 튜브형 광케이블 |
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