KR101134939B1 - Optical fiber for solar light transfer, its production method and optical cable using the same - Google Patents

Abstract

The present invention is a core made of pure silica; A primary cladding layer covering the outer side of the core and having a refractive index of 1.40 to 1.41 or a glass compound doped with a high concentration of fluorine or boron; And a secondary cladding layer of synthetic resin (resin) having a refractive index of 1.50 to 1.51, wherein the core diameter is a1, the diameter of the primary cladding layer is a2, and the diameter of the secondary cladding layer is a3. When a2 / a1 = 1.1 to 1.13, a3 / a2 = 1.09 to 1.12, and a3 / a1 = 1.15 to 1.25, the difference in refractive index between the core and the primary cladding layer is 2.5 to 3.5% Disclosed is an optical fiber for solar transmission having a numerical aperture of 0.3 to 0.45.

Silica, core, refractive index, light receiving angle, sunlight

Description

Optical fiber for solar transmission, its manufacturing method and optical cable using the same {OPTICAL FIBER FOR SOLAR LIGHT TRANSFER, ITS PRODUCTION METHOD AND OPTICAL CABLE USING THE SAME}

The present invention relates to a solar light transmitting optical fiber and a method for manufacturing the same, and an optical cable using the same, and more particularly, to a solar light transmitting optical fiber, a method for manufacturing the same, and an optical cable using the same.

In the prior art, a solar condensing and receiving device using a plastic optical fiber is mainly used to transmit solar lighting. Quartz-based glass optical fibers with diameters of 0.77 to 2.3 mm are used as single or multi-cores. In contrast, plastic optical fibers have a diameter of 10 to 20 mm, but are advantageous in terms of curvature in terms of raw materials.

However, in the case of using the plastic optical fiber, the transmission characteristics and efficiency are more expensive than the quartz glass optical fiber, and the transmission efficiency is not good because the loss in the short wavelength is high due to the Rayleigh scattering.

In addition, there is a problem that the color rendering is poor when transmitting the sunlight 20m or more using a plastic optical fiber. Color rendering refers to a property of a light source that determines the color of the object by a light source, and it can be said that color rendering is inferior as the color is different from the color of sunlight.

In addition, in the case of plastic optical fiber, there is a problem that the optical fiber end portion is deformed by the high temperature due to the solar light concentration.

SUMMARY OF THE INVENTION An object of the present invention is to provide a solar transmission optical fiber, a method of manufacturing the same, and an optical cable using the same, which has an increased light receiving angle of sunlight and improved transmission efficiency to improve transmittance.

Another object of the present invention is to provide an optical fiber for transmitting sunlight, a method of manufacturing the same, and an optical cable using the same, which improves heat resistance with respect to heat generated when the solar light is collected and transmitted.

It is still another object of the present invention to provide a method for manufacturing a solar transmission optical fiber and an optical cable composed of a large diameter core composed of pure silica and a cladding having a low refractive index difference.

The above object is a core made of pure silica; A primary cladding layer covering the outer side of the core and having a refractive index of 1.40 to 1.41 or a glass compound doped with a high concentration of fluorine or boron; And a secondary cladding layer of synthetic resin (resin) having a refractive index of 1.50 to 1.51, wherein the core diameter is a1, the diameter of the primary cladding layer is a2, and the diameter of the secondary cladding layer is a3. When a2 / a1 = 1.1 to 1.13, a3 / a2 = 1.09 to 1.12, and a3 / a1 = 1.15 to 1.25, the difference in refractive index between the core and the primary cladding layer is 2.5 to 3.5% A numerical aperture is achieved by solar transmission optical fibers with 0.3 to 0.45.

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In addition, the above object is the first step of producing a core soot (soot) by depositing pure silica on the core; A second step of carrying out a dehydration process using an chlorine (Cl ₂ ) gas into an electric furnace to remove OH ions remaining in the core chute; A third step of heating and stretching in the electric furnace to vitrify the core chute to produce a glass sintered body; And a fourth step of drawing the optical fiber by drawing the glass sintered body, wherein the outer diameter of the core chute is 160 to 170 mm in the first step, and the outer diameter of the glass sintered body is 30 It is achieved by the manufacturing method of the optical fiber for photovoltaic transmission extending to ˜40 mm.

According to the configuration described above, pure silica is used as the core, and due to the inherent characteristics of silica, the transmission efficiency of solar light is superior to 30 to 40% of the conventional plastic optical fiber at 60 to 70% or more at a transmission length of 20 to 30 m.

In addition, in order to prevent the deformation of the end of the optical fiber due to the high temperature due to the solar light condensation, using a low refractive index heat-resistant resin or a silica layer doped with a high concentration of fluorine-based or boron-based doping layer up to 200 ℃ or more There is an effect that can be improved.

In addition, the large diameter pure silica core manufactured by VAD (Vapour phase Axial Deposition) method is easier to work when polishing the cross-section than the other optical fiber manufactured by the other method and can realize a low reflectance.

In addition, when 100m is transmitted using the optical fiber of the present invention, there is an advantage that the color rendering is maintained even though the transmittance is reduced.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a cross-sectional view showing an optical fiber according to an embodiment of the present invention.

The optical fiber 10 includes a core 11 made of pure silica (SiCl ₄ ), a synthetic resin (resin) layer having a low refractive index of 1.40 to 1.41, or a primary cladding layer made of a glass compound doped with a high concentration of fluorine or boron. 12) and a secondary cladding layer 13 made of a synthetic resin (resin) layer having a refractive index of 1.50 to 1.51. At this time, the core made of silica manufactured a core soot having an outer diameter of 160 to 170 mm composed of pure silica, and then subjected to dehydration by adding 700 to 900 cc of chlorine (Cl ₂ ) at a temperature of 1,050 to 1,150 ° C. For the vitrification, it is prepared by flame hydrolysis by VAD (Vapour phase Axial Deposition) method sintered at 1,500 ~ 1,600 ℃. As such, when the core of the optical fiber is pure silica, the transmittance is excellent and the reflected light is small, so it is excellent as the optical fiber. There is an effect that can lower the refractive index of. In addition, the light receiving angle that receives light is related to the numerical aperture, and the larger the difference in refractive index, the larger the light receiving angle.

On the other hand, if the diameter of the core 11 is a1, the diameter of the primary cladding layer 12 is a2, and the diameter of the secondary cladding layer 13 is a3, a2 / a1 = 1.1 to 1.13, a3 / a2 = 1.09 to 1.12, and a3 / a1 = 1.15 to 1.25, and the refractive index difference between the core 11 and the primary cladding layer 12 is 2.5 to 3.5%, and the numerical aperture is 0.3 to 0.45. Can be. At this time, the larger the diameter of the core, the greater the amount of sunlight incident into the optical fiber, but if it is too large, it is difficult to bend due to the nature of the glass.

On the other hand, the diameter of the core is 0.7 ~ 2.0mm, the diameter of the primary and secondary cladding layer is preferably 0.77 ~ 2.3mm. In this case, if the diameter is large, the curvature of the cable is limited, so when using single core, the outer diameter is mainly 1.4 ~ 2.0 mm, and when used as a multi-core optical cable, 0.7 ~ 1.4 mm is mainly used for smooth handling. It is preferable to use.

The optical fiber according to the present invention has a loss value of 13 dB / km or less at a wavelength of 850 nm, and has a maximum temperature at the end portion of the optical fiber which is in contact with the concentrated solar heat by using a low refractive index resin or a silica layer doped with a high concentration of fluorine or boron. There is no change in properties at 200 ° C.

On the other hand, by using the optical fiber according to the present invention can be produced in 6-core, 8-core, and 10-core optical cable. In other words, in order to reinforce the tensile force during laying, using a central tensile line (FRP) and the optical fiber is arranged around it, and the tape taping with the bound yarn with a stranding pitch of 0 ~ 1700mm polyethylene or polyvinyl chloride An optical cable is manufactured by final coating with (PVC).

In addition, it is possible to manufacture a lighting solar cable using the optical fiber according to the present invention.

As shown in FIG. 2, the single-core solar cable is an optical cable used when a single core and a two-core optical fiber for transmitting light are required to be reinforced by tensile force and an external environment, and the like, and polyvinyl chloride outside the optical fiber 51. It is prepared by primary coating using a coating material 52, etc., putting aramid yarn 53 in order to enhance tensile strength, and finally coating the flame retardant polyethylene or polyvinyl chloride 54. These single-core solar cables are mainly used for areas where cable laying is exposed to the outside, wet areas underground, signboards and small lighting.

As shown in FIG. 3, the two-core optical cable using the solar fiber for lighting is manufactured as a double-plex optical cable by bonding between single-core cables having the same structure as in FIG. 2 during an adhesive or coating operation. easy.

On the other hand, as shown in Figure 4, the 6-core, 8-core, 12-core solar cable for multi-core lighting, such as glass fiber reinforcement plastic 42 on the outside of the optical fiber and the optical fiber 41 is disposed around the PET tape It is produced by taping with 43 and wrap tape 44 and final coating with flame retardant polyethylene or polyvinyl chloride 45.

And, as shown in Figure 5, the optical, all composite cable is installed in the center of the power supply line cross-linked polyethylene insulation vinyl sheathed cable (CV line, 61) of 1 ~ 4 mm diameter, the optical fiber around the power line in the center (62) is placed, taped with PET yarn (63), taped (64), and finally coated with flame retardant polyethylene or polyvinyl chloride (65). The power supply line located at the center of the optical and all-complex cables can be located outside in the form of eight-character processing, and can also be located at the outside when the external cable type is applied.

In addition, the optical, all composite cable is placed in the optical fiber around the center tension line and wrap taped with PET yarn to be primarily coated with flame-retardant polyethylene or polyvinyl chloride, and to place the shock absorber on the outer peripheral surface of the coating, It can be manufactured by providing an insulated power supply line and secondary coating with flame retardant polyethylene or polyvinyl chloride. At this time, the impact inhibitor is a wire, taping, aluminum steel wire is used.

When the illumination lamp 66 is installed at the ends of the optical and all composite cables, and the illumination intensity of the solar light becomes less than a certain illumination intensity, the illumination lamp 66 is lighted by receiving power from a power line inside the optical cable. The abnormality is maintained. That is, as shown in FIG. 6, when the light and all composite cables are collected through the condenser 71 and the solar light 72 transmitted through the optical fiber 61 is weak or absent, the optical cable for solar transmission Power may be supplied through the mounted power supply line 75 to illuminate the lighting lamp 66. Accordingly, when the sunlight is weak or no, the power of the lamp can be supplied by the power line in the cable, there is an advantage that the light can be brightened by using the lamp without a separate power supply line. On the other hand, the illumination lamp is preferably an LED lamp.

(Example 1)

After preparing a core soot having an outer diameter of 160 to 170 mm made of pure silica, 700 to 900 cc of chlorine (Cl ₂ ) is added at a temperature of 1,050 to 1,150 ° C., followed by a dehydration process, and 1,500 to 1,600 for vitrification. Sintering is carried out at ° C to obtain a glass sintered body having an outer diameter of 70 to 80 mm.

Then, the film is drawn to an optical fiber 30 to 50 mm in diameter and drawn to an optical fiber. The drawing temperature of 2,000 to 2,100 ° C. is drawn at a working flux of 2 to 10 mpm. In this case, the diameter of the core was 1.5 mm, the diameter of the primary cladding layer was 1.65 mm, and the diameter of the secondary cladding layer was 1.8 mm.

In the case of a general optical fiber, the numerical aperture is 0.12, whereas the numerical aperture of the optical fiber manufactured by the above process is 0.36 to 0.37, and the light receiving angle refers to the maximum angle of incidence at the incidence end for transmitting light into the core. (acceptance angle) is 42.2 ~ 44 degrees and the loss value at 850nm was measured as 11.5㏈ / km.

In order to measure the illuminance of the light transmitted through one strand of the optical fiber, the light emitted from the halogen lamp connected to the power supply device was spaced 10 mm apart and incident on 20 m of optical fiber having a diameter of 1.5 to 1.8 mm to measure the illuminance through a spectrometer. As shown in FIG. 7, the resulting roughness of 37,000 lx, 45,000 lx, and 50,000 lx was measured depending on the fiber size.

In addition, 6-core, 8-core, and 10-core optical cables were manufactured using the prepared optical fiber. In order to reinforce the tensile force during installation, use a central tensile line (FRP) and place the optical fiber around it, and tape taping with bind yarn with a stranding pitch of 0 to 1,700 mm to polyethylene or polyvinyl chloride (PVC). ) Was finally coated to prepare an optical cable. The final outer diameters of the 6-core, 8-core, and 10-core optical cables were about 8.4 mm, 10.2 mm, and 11.8 mm, respectively. The allowable tensile strengths for the installation were 50 kgf, 100 kgf, and 180 kgf.

In addition, a solar cable for one-core and two-core lighting using the manufactured optical fiber was manufactured. It is a structure that can be first coated with a coating material such as polyvinyl chloride on the outside of the optical fiber, aramid yarn can be added to reinforce the tensile strength, and the structure is secondly coated with flame retardant polyethylene or polyvinyl chloride. It is mainly used for wet section of underground, sign board and small lighting. In general, one core has an outer diameter of 3.8 to 5 mm and a two core optical cable bonded to one core has 8 to 11 mm, and the allowable tensile strength is 2 to 10 kgf.

In addition, using the manufactured optical fiber, optical and all composite cables are installed in the center with a 1-4 mm diameter crosslinked polyethylene insulated vinyl sheathed cable (CV line, 61), and the optical fiber ( 62) is placed and taped with PET yarn 63 and lap taping 64, and finally coated with flame-retardant polyethylene or polyvinyl chloride 65, and when the roughness is below a certain roughness, the tape is wrapped by the illuminance sensor. The power is applied from the power line inside the taping 64 so that the LED lamps can be automatically emitted. The power supply line located at the center of the optical and all-complex cables can be located outside in the form of eight-character processing, and can also be located at the outside when the external cable type is applied.

(Example 2)

After preparing a core soot having an outer diameter of 160 to 170 mm made of pure silica, 700 to 900 cc of chlorine (Cl ₂ ) is added at a temperature of 1,050 to 1,150 ° C., followed by a dehydration process, and 1,500 to 1,600 for vitrification. Sintering is carried out at ° C to obtain a glass sintered body having an outer diameter of 70 to 80 mm.

Then, stretched to a diameter of 20 ~ 50㎜ and inserted into a tube doped with a high concentration of fluorine or boron of 1.40 ~ 1.42 level to join the glass sintered body and the tube through the collapsing (collapse) process. The inner diameter of the tube is 20.5 ~ 51㎜, the outer diameter is 22 ~ 56.5㎜ and contains a high concentration of fluorine-based or boron-based to reduce the flame intensity of the Collabs process up to 5 ~ 20% compared to the existing work.

Then, it is placed in a drawing furnace and drawn out by an optical fiber, which is coated with a general secondary coating resin having a refractive index of 1.502 while drawing at a working speed of 2 to 10mpm at a drawing temperature of 1,900 to 2,050 ° C. In this case, the diameter of the core was 1.45 mm, the diameter of the primary cladding layer was 1.61 mm, and the diameter of the secondary cladding layer was 1.82 mm.

The numerical aperture was 0.35 to 0.38, the acceptance angle was 41 to 47 degrees, and the loss value at 850 nm was measured to be 10.2 dB / km.

The difference from Example 1 is that a primary cladding layer composed of a glass compound doped with a high concentration of fluorine or boron is applied to silica instead of a primary cladding layer using a resin. There is a big advantage to withstand. This is because the primary cladding layer is glass, so that even if high temperature condensed sunlight is incident on the optical fiber, it can withstand the inherent properties of the glass.

<Experimental Results>

8 shows the refractive index distribution of the optical fiber manufactured in Example 1. FIG. The refractive index of the core made of silica (SiCl ₄ ) is 1.457, the refractive index of the primary cladding layer 13 is 1.41, and the refractive index of the secondary cladding layer 13 is higher than that of the primary cladding layer 13.

9 is a spectral characteristic after passing through the optical fiber 2m in the visible light region of 400 ~ 800nm used for illumination. The light was made into a halogen lamp, and 300 mm apart, the light was incident on a 2 m optical fiber having a core of 1.2 mm in diameter, and then the spectra were measured by using light emitted through the optical fiber in front of 2 mm.

10 is a spectral characteristic after passing through the optical fiber 35m in the visible light region of 400 ~ 800nm used for illumination, the configuration is the same as FIG.

11 is a spectral characteristic after passing through optical fibers 85m, 200m, and 300m in the visible light region of 400-800 nm used for illumination, respectively, and the configuration is the same as FIG.

12 is a configuration diagram for measuring the transmittance of light transmitted through an optical fiber. The light emitted from the halogen lamp 31 to which the power supply device 32 is connected is spaced 10 mm, and an optical fiber 33 having a core diameter of 1.2 mm and a cladding diameter of 1.5 mm is disposed to measure transmittance through the spectrometer 34.

FIG. 13 is a graph measuring transmittance according to transmission length by transmitting light focused on an optical fiber having a cladding diameter of 1.8 mm manufactured in Example 1 for high efficiency long-range solar transmission. The transmittance is 92% at 20m transmission length, 80% at 50m length, 62% at 100m, 48% at 200m, 32% at 300m, and 500m combined with 200m and 300m optical fibers, and then transmittance is 15%. Was measured. The transmission length is adjusted according to the transmission length according to the transmission length to transmit the light through the optical fiber and the transmission length is more than 90% at 20m, more than 75% at 50m, more than 57% at 100m, at least 45% at 200m, and at 300m It may have a transmittance of 27% or more.

In the above description, the embodiment of the present invention has been described, but various changes can be made at the level of those skilled in the art. Therefore, the scope of the present invention should not be construed as limited to the above embodiments, it should be interpreted by the claims described below.

1 is a cross-sectional view showing a solar fiber for illumination according to Example 1 of the present invention.

2 is a cross-sectional view of a one-core optical fiber cable using the optical fiber manufactured in Example 1. FIG.

3 is a cross-sectional view of a two-core optical fiber cable using the optical fiber manufactured in Example 1. FIG.

4 is a cross-sectional view of an eight-core optical fiber cable using the optical fiber manufactured in Example 1. FIG.

Fig. 5 is a sectional view of the optical and all composite cables using the first embodiment.

FIG. 6 is a diagram illustrating light incident on the optical and power cables of FIG. 5.

FIG. 7 is a spectrum analysis diagram obtained by using a spectrometer to measure light passing through an optical fiber 10m using a halogen lamp as a light source.

8 shows the refractive index distribution of the optical fiber.

FIG. 9 is a spectrum analysis diagram obtained by using a spectrometer to measure light passing through an optical fiber 2m using a halogen lamp as a light source.

FIG. 10 is a spectrum analysis diagram obtained by using a spectrometer to measure light passing through an optical fiber 35m using a halogen lamp as a light source.

FIG. 11 is a spectrum analysis diagram obtained by using a spectrometer to measure light passing through optical fibers 85, 200 and 300 m using a halogen lamp as a light source.

12 is a configuration diagram for measuring the transmittance of light transmitted through an optical fiber.

Figure 13 is a graph showing the efficiency according to the length of light transmitted through the manufactured solar fiber for illumination.

Claims (18)

delete A core made of pure silica; A primary cladding layer covering the outer side of the core and having a refractive index of 1.40 to 1.41 or a glass compound doped with a high concentration of fluorine or boron; And a secondary cladding layer of synthetic resin (resin) having a refractive index of 1.50 to 1.51, If the diameter of the core is a1, the diameter of the primary cladding layer is a2, and the diameter of the secondary cladding layer is a3, a2 / a1 = 1.1 to 1.13, a3 / a2 = 1.09 to 1.12, and a3 / a1 = 1.15 to 1.25, the difference in refractive index of the core and the primary cladding layer is 2.5 to 3.5%, the numerical aperture of the solar transmission quartz-based optical fiber, characterized in that 0.3 to 0.45. A core made of pure silica; A primary cladding layer covering the outer side of the core and having a refractive index of 1.40 to 1.41 or a glass compound doped with a high concentration of fluorine or boron; And a secondary cladding layer of synthetic resin (resin) having a refractive index of 1.50 to 1.51, The diameter of the core is 0.7 ~ 2.0mm, the diameter of the primary and secondary cladding layer is 0.77 ~ 2.3mm, characterized in that the quartz optical fiber for solar transmission. A core made of pure silica; A primary cladding layer covering the outer side of the core and having a refractive index of 1.40 to 1.41 or a glass compound doped with a high concentration of fluorine or boron; And a secondary cladding layer of synthetic resin (resin) having a refractive index of 1.50 to 1.51, When the primary cladding layer is a synthetic resin, the loss value at the wavelength of 850 nm is 13 ㎞ / km or less, the temperature of the end of the optical fiber in contact with the concentrated solar heat is characterized in that there is no change in characteristics at up to 200 ℃ Quartz-based optical fiber for transmission. A core made of pure silica; A primary cladding layer covering the outer side of the core and having a refractive index of 1.40 to 1.41 or a glass compound doped with a high concentration of fluorine or boron; And a secondary cladding layer of synthetic resin (resin) having a refractive index of 1.50 to 1.51, When the primary cladding layer is a glass compound doped with a high concentration of fluorine or boron, the loss value at a wavelength of 850 nm is 13 mW / km or less, and the temperature of the end portion of the optical fiber in contact with the concentrated solar heat is at a maximum of 600 ° C. Quartz-based optical fiber for solar transmission, characterized in that there is no change. A core made of pure silica; A primary cladding layer covering the outer side of the core and having a refractive index of 1.40 to 1.41 or a glass compound doped with a high concentration of fluorine or boron; And a secondary cladding layer of synthetic resin (resin) having a refractive index of 1.50 to 1.51, Light transmission through the optical fiber, so that the transmission length has a transmittance of more than 90% at 20m, at least 75% at 50m, at least 57% at 100m, at least 45% at 200m, and at least 27% at 300m Quartz optical fiber. A core made of pure silica; A primary cladding layer covering the outer side of the core and having a refractive index of 1.40 to 1.41 or a glass compound doped with a high concentration of fluorine or boron; And a secondary cladding layer of synthetic resin (resin) having a refractive index of 1.50 to 1.51, A quartz-based optical fiber for solar transmission, characterized in that the illuminance after passing 20 m of the optical fiber 10 mm apart from the halogen lamp light source is 37,000 to 50,000 lx. delete delete Depositing pure silica on the core to produce a core soot; A second step of carrying out a dehydration process using an chlorine (Cl ₂ ) gas into an electric furnace to remove OH ions remaining in the core chute; A third step of heating and stretching in the electric furnace to vitrify the core chute to produce a glass sintered body; And a fourth step of drawing the optical fiber by drawing the glass sintered body, In the first step, the outer diameter of the core chute is manufactured to be 160 to 170 mm, and in the third step, the outer diameter of the glass sintered body is stretched to be 30 to 40 mm. Way. Depositing pure silica on the core to produce a core soot; A second step of carrying out a dehydration process using an chlorine (Cl ₂ ) gas into an electric furnace to remove OH ions remaining in the core chute; A third step of heating and stretching in the electric furnace to vitrify the core chute to produce a glass sintered body; And a fourth step of drawing the optical fiber by drawing the glass sintered body, In the second step, the core chute is heated at 1,050 ~ 1,150 ℃, in the third step, the core chute is heated at 1,500 ~ 1,600 ℃ manufacturing method of the optical fiber for solar transmission. Preparing a glass base material deposited with pure silica; A dehydration step of removing OH groups remaining in the glass base material; A sintering step of vitrifying the glass base material; An stretching step of stretching the glass sintered body to 20 to 50 mm; And And inserting the stretched base material into a tube containing a large amount of fluorine or boron, and bonding the glass sintered body and the tube through a collapsing process. . The center tension line is made of glass fiber reinforced plastic (FRP), and around 1-100 strands of the optical fiber of Claim 2 are mounted around it, and the stranding pitch is 0-1,700 mm, and PET tape and a lap taping outside are wrapped (lap) Optical fiber cable for solar transmission, characterized in that the coating by flame retardant polyethylene or polyvinyl chloride (PVC). The optical fiber cable for solar transmission, characterized in that the first coating using a coating material containing polyvinyl chloride on the outer side of the optical fiber of claim 2 and the final coating with aramid yarn to strengthen the tensile strength and finally coated with flame retardant polyethylene or polyvinyl chloride. An optical and all-complex cable comprising an insulated power line in the center, the optical fiber of claim 2 arranged around the power line in the center, and taped with PET yarn and finally coated with flame retardant polyethylene or polyvinyl chloride. Placing the optical fiber of claim 2 around the center tensile wire and wrap-tapping with PET yarn, which is finally coated with flame retardant polyethylene or polyvinyl chloride, and has an insulated power line attached to an outer side of the cable. Composite cable. Place the optical fiber of claim 2 around the center tensile wire and wrap taped with PET yarn to be first coated with flame retardant polyethylene or polyvinyl chloride, to place an impact inhibitor on the outer circumferential surface of the sheath, and to be insulated on the impact inhibitor. Optical fiber, all composite cable characterized in that the secondary coating with flame retardant polyethylene or polyvinyl chloride. An optical, all-complex cable, characterized in that an illumination lamp is formed at the end of the optical, all-complex cable of any one of claims 15 to 17.

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