Reflective optical fiber ribbon, preparation method thereof, optical device and ribbon cable

Abstract

The present invention discloses a reflective optical fiber ribbon, a preparation method thereof, an optical device, and a ribbon cable. The optical fiber ribbon comprises a plurality of optical fibers arranged side by side, a ribbon resin coating the surface of the optical fibers, and a reflective layer inlaid and bonded with the ribbon resin; the reflective layer extends axially along the optical fiber ribbon; the reflective layer is formed by curing a UV-curable resin containing a reflective agent, the content of the reflective agent is 2 to 10 wt%, and the thickness of the reflective layer is 10 to 20 um. The reflective optical fiber ribbon provided by the present invention can reflect light, and under weak lighting conditions in the laying and application environment, its reflective characteristics can improve the recognizability, and the optical fiber ribbon can be quickly positioned without relying on a completely dark environment or short afterglow. The preparation method of the reflective optical fiber ribbon provided by the present invention can not only firmly bond the reflective layer and the ribbon resin layer, but also the secondary coating and curing can minimize the influence of the reflective agent on the curing efficiency and curing quality.

Description

Technical Field

[0001] The present invention belongs to the field of optical communications, and more particularly, relates to a reflective optical fiber ribbon, a preparation method thereof, an optical device, and a ribbon cable. Background Art

[0002] Fiber-optic communication, with its advantages of high transmission capacity and excellent confidentiality, has become one of the primary communication methods today. With years of development, fiber optics have gradually entered thousands of households. Integrated optical devices, with fiber as one of their core components, are widely used in communications, medicine, national defense, and other fields, including all-optical networks, security monitoring, and optical imaging.

[0003] With the advancement of information technology, optical cables and components, centered around high-efficiency, high-density fiber ribbons, are being used in integrated cabling systems in locations such as large data centers, subway tunnels, and high-rise buildings. These locations often face poor lighting conditions during installation and operation, which often impacts splicing efficiency and subsequent maintenance and repair work. Therefore, the visibility of optical cables, especially ribbon cables, has long been a desired performance characteristic within the industry.

[0004] Chinese patent document CN206649195U provides a flame-retardant fluorescent optical cable, which effectively improves the recognizability of the optical cable by setting fluorescent color strips on the outer surface of the optical cable and utilizing fluorescent afterglow. Fluorescent materials generally enter an excited state after absorbing light energy, and then emit the energy in the form of light, thereby achieving a luminous effect. This type of fluorescent material generally has the characteristics of a short service life, a limited duration of afterglow, the luminous brightness decays over time, and the intensity of the excitation light source affects the fluorescent luminescence characteristics. Once the lighting conditions in the place where the optical fiber ribbon is used are poor, the absorbed light energy is limited, which will directly affect the recognition effect of the optical fiber ribbon in this scene. In addition, there are also technologies that apply the reflection principle and combine the luminescence and reflection principles to improve the recognizability of optical cables, such as Chinese patent document CN107728273A.

[0005] Existing technologies all aim to improve the visibility of the outer sheath of the optical cable. However, relatively speaking, the visibility of the outer sheath is significantly stronger than that of the optical fiber ribbon. What really affects the efficiency of fusion splicing and subsequent maintenance and repair work is the visibility of the optical fiber ribbon. Summary of the Invention

[0006] In response to the above-mentioned defects or improvement needs of the prior art, the present invention provides a reflective optical fiber ribbon, a preparation method thereof, an optical device, and a ribbon cable. The purpose of the present invention is to firmly attach a reflective layer to the outside of the optical fiber ribbon, thereby making the optical fiber ribbon as a whole or in part have outstanding glossiness, and improving the recognizability under poor lighting conditions, thereby solving the technical problem that the existing ribbon cables have low recognition when used in devices or high-density optical cables, which is not conducive to improving welding efficiency and maintenance work.

[0007] To achieve the above objectives, according to one aspect of the present invention, a reflective optical fiber ribbon is provided, comprising a plurality of optical fibers arranged side by side, a ribbon resin coating the surfaces of the optical fibers, and a reflective layer embedded and bonded to the ribbon resin; the reflective layer extends axially along the optical fiber ribbon;

[0008] The reflective layer is formed by curing a UV curable resin containing a reflective agent. The content of the reflective agent is 2-10 wt %, and the thickness of the reflective layer is 10-20 μm.

[0009] Preferably, the reflective layer matrix resin of the reflective optical fiber ribbon is the same type of resin as the ribbon resin, and the resin curing degree is between 80% and 95%.

[0010] Preferably, the reflective layer of the reflective optical fiber ribbon is an outer wrapped structure or a light strip structure;

[0011] When the reflective layer is a reflective strip structure, its width is 30% to 60% of the width of the optical fiber ribbon.

[0012] Preferably, the reflective agent of the reflective optical fiber ribbon is sericite powder, and the particle size is preferably 1 to 5 μm.

[0013] Preferably, the reflective optical fiber ribbon, wherein the UV curable resin containing the reflective agent is an epoxy acrylate resin, and preferably further contains 0.5-1 wt.% of a dispersant, 0-0.5 wt.% of a pigment, and / or 0.3-1.5 wt.% of an auxiliary agent;

[0014] The dispersant is a combination of one or more of ammonium salt, modified trimethoxysilane, polyamide, polyglycol ether, and polydimethylsiloxane;

[0015] The auxiliary agent includes a defoaming agent.

[0016] Preferably, the reflective optical fiber ribbon, the ribbon resin is formed by curing a UV-curable resin, the thickness of which is 20 to 40 μm, preferably an epoxy acrylate resin, the Young's modulus of the ribbon resin is between 300 and 1000 MPa, and the elongation at break must be greater than 5%; the reflective layer is formed by coating the surface of the UV-initiated ribbon resin and curing it by UV initiation.

[0017] According to another aspect of the present invention, a method for preparing the reflective optical fiber ribbon is provided, characterized in that it comprises the following steps:

[0018] Pre-curing: coating the outer sides of the optical fibers arranged side by side with a UV curable resin for forming a ribbon resin, and UV initiating the UV curable resin to obtain a pre-cured optical fiber ribbon;

[0019] Reflective layer coating: Coat the pre-cured optical fiber ribbon with UV curing resin containing reflective agent at the preset position and wait for it to level to obtain the optical fiber ribbon preform;

[0020] Curing: The optical fiber ribbon preform is subjected to UV initiation and cured to obtain the reflective optical fiber ribbon.

[0021] Preferably, in the preparation method of the reflective optical fiber ribbon, the UV curable resin containing the reflective agent is uniformly dispersed, preferably continuously stirred for more than 2 hours, the stirring temperature is 40-55° C., and the coating thickness is controlled at 10-20 μm, preferably 10-15 μm;

[0022] The reflective layer coating step occurs when the curing degree of the UV curable resin used to form the tape resin does not exceed 45%; the curing step occurs when the curing degree of the UV curable resin used to form the tape resin does not exceed 60%.

[0023] According to another aspect of the present invention, there is provided an application of the reflective optical fiber ribbon, which is applied to the production of optical devices, such as optoelectronic integrated circuit board connectors and optical connectors.

[0024] According to another aspect of the present invention, a ribbon cable is provided, comprising the reflective optical fiber ribbon.

[0025] In general, the above technical solutions conceived by the present invention can achieve the following beneficial effects compared with the prior art:

[0026] The reflective optical fiber ribbon provided by the present invention can reflect light. Under weak lighting conditions in the laying and application environment, its reflective characteristics can improve the recognizability, and the optical fiber ribbon can be quickly positioned without relying on a completely dark environment or short afterglow.

[0027] In a preferred embodiment, the reflective material provided is mica, which has good weather and corrosion resistance. By adding different colored pigments to the fiber ribbon resin, the fiber ribbon can reflect different colors of light, making it easier to distinguish multiple fiber ribbons in the same optical cable or device.

[0028] The preparation method of the reflective optical fiber ribbon provided by the present invention can not only firmly combine the reflective layer and the ribbon resin layer, but also the secondary coating and curing can maximally avoid the influence of the reflective agent on the curing efficiency and curing quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 Schematic diagram of the reflective optical fiber ribbon structure provided by Example 1 of the present invention;

[0030] Figure 2 Schematic diagram of the reflective optical fiber ribbon structure provided by Example 2 of the present invention;

[0031] Figure 3 Schematic diagram of the reflective optical fiber ribbon cable structure provided by this embodiment of the present invention.

[0032] In all the drawings, the same reference numerals are used to denote the same elements or structures, wherein: 1 is optical fiber, 2 is ribbon resin, 3 is reflective layer, 4 is reflective optical fiber ribbon, 5 is outer sheath, 6 is loose tube, 7 is water-blocking yarn, 8 is aramid, 9 is water-blocking yarn, and 10 is open cable. DETAILED DESCRIPTION

[0033] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely for the purpose of explaining the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

[0034] Since the solution to improve the identifiability of optical cables based on the principle of fluorescence is difficult to effectively improve the identifiability of optical cables in an environment with certain lighting conditions that are not sufficient to clearly distinguish the optical cables, it is difficult to effectively improve the identifiability of optical cables in an environment with certain lighting conditions that are not sufficient to clearly distinguish the optical cables. The optical cables cannot emit light on their own without being stimulated, the afterglow time is short, and the materials inevitably attenuate and age. The solution to improve the identifiability of optical cables based on the principle of reflection is more suitable for dim scenes with certain lighting conditions, such as flashlights, computer room lighting, etc., and is more in line with the actual application needs of inspection and maintenance.

[0035] The present invention provides a reflective optical fiber ribbon, comprising a plurality of optical fibers arranged side by side, a ribbon resin coating the surfaces of the optical fibers, and a reflective layer inlaid and bonded with the ribbon resin; the inlaid bonding refers to the close bonding between the interfaces to form an integrated structure without the presence of structural gaps.

[0036] The reflective layer is formed by curing a UV-curable resin containing a reflective agent. Preferably, the ribbon resin is the same as the matrix resin, with a curing degree of 80% to 95%. The reflective layer extends axially along the optical fiber ribbon. The reflective layer can be wrapped around the outside, suitable for optical fiber ribbons used in optical devices such as optoelectronic integrated circuit board connectors and optical connectors. Alternatively, the reflective layer can be constructed as a reflective strip, with a width ranging from 30% to 60% of the ribbon width, suitable for densely packed optical fiber ribbon arrays, such as ribbon cables. Due to the dense arrangement of optical fiber ribbons, a reflective layer that is too wide or too narrow is not conducive to improving legibility.

[0037] The addition of reflective agent to the reflective layer makes the reflective layer brighter as a whole. When light shines on the reflective layer, it brings a mirror reflection effect, which is clearly different from the rest of the optical fiber ribbon. It can significantly improve the recognizability of the optical fiber ribbon, especially when used in the production of optical fiber devices, and has both improved recognizability and aesthetic decorative effects.

[0038] The reflective agent content is 2-10 wt%, preferably sericite powder, with a particle size of 1-5 μm. Sericite powder is a scaly crystal with a fine texture and a large aspect ratio, resulting in excellent reflective properties. It also exhibits outstanding gloss and high visibility under dim light sources at night or indoors. Sericite powder also offers the advantages of strong tensile strength, radiation protection, and resistance to UV aging, making it particularly suitable for use in optical fiber ribbons exposed to the outside world. This improves both visibility and the service life of the ribbons. Furthermore, the mica surface contains a small amount of active hydroxyl groups, enabling it to be more stably dispersed in the resin.

[0039] Considering the adverse effects of reflective agents on curing speed, the thickness of the reflective layer should be controlled within 10-20 μm, preferably within 15 μm. Therefore, the mica powder particle size must be adjusted to the thickness of the reflective layer to ensure the leveling properties of the UV-curable resin and avoid uneven fiber ribbon surfaces caused by the addition of mica powder.

[0040] The UV-curable resin containing the reflective agent is preferably an epoxy acrylate resin, and more preferably further contains 0.5-1 wt.% of a dispersant, 0-0.5 wt.% of a pigment, and / or 0.3-1.5 wt.% of an auxiliary agent. The dispersant is a combination of one or more of ammonium salts, modified trimethoxysilanes, polyamides, polyglycol ethers, and polydimethylsiloxanes. The dispersant is used to reduce the agglomeration of small aggregates and primary microcrystalline particles formed after the large aggregates are broken, and can prevent the reflective agent, pigment, and other components from settling, thereby making the dispersion of the reflective agent and pigment more uniform. The auxiliary agents include but are not limited to defoaming agents. The pigment is added according to actual use requirements to make it recognizable at night and to give the resin a corresponding color.

[0041] The tape resin is formed by curing with UV-curable resin, with a thickness of 20 to 40 μm, preferably epoxy acrylate resin. The Young's modulus of the tape resin is between 300 and 1000 MPa, and the elongation at break is greater than 5%. Preferably, the reflective layer is formed by coating the surface of the UV-cured tape resin and then curing it.

[0042] Unlike sheaths made of thermoplastic polymers, fiber optic ribbons are generally formed from a light-curing resin. The reflective layer is also made of a light-curing resin to ensure a tight bond with the ribbon. However, the addition of a reflective agent, due to its specular reflection, inevitably affects UV light absorption, thus affecting curing efficiency. This effect is more pronounced with thicker resin coatings. Therefore, we first reduce the thickness of the reflective layer, embedding it within the ribbon resin layer. It only needs to provide a clear marking effect. At the same time, excessively thin reflective agent will prevent the granular reflective agent from forming a smooth surface. The reflective layer thickness is controlled between 10 and 20 μm. Secondly, the reflective agent content needs to significantly enhance the reflective layer's visibility while minimizing its impact on curing efficiency and quality. More importantly, to address the issue of poor reflection caused by reflective agents, the present invention first explores the reflective agent content, then forms the tape resin and the reflective layer through two curing steps. The UV-curable resin forming the reflective layer is immediately applied after UV initiation. On the one hand, the good fluidity of the UV-curable resin before curing allows the reflective layer to be smoothly interlocked with the single-layer resin after coating, ensuring a smooth appearance after the single-layer resin has been applied. On the other hand, due to the chain reaction of UV curing, the pre-cured tape resin polymerizes with the UV-curable resin of the reflective layer, which not only firmly bonds the reflective layer to the single-layer resin but also improves the curing efficiency of the reflective layer. This is comparable to the existing optical fiber ribbon manufacturing process, and there is no need to adjust the entire production line to accommodate the curing of the single-layer resin.

[0043] The optical fiber ribbon provided by the present invention not only enables rapid location and identification during tunnel repairs and nighttime inspections due to its reflective properties, but can also serve as an optical fiber ribbon marker. When multiple optical fiber ribbons are required in an optical cable or optical device, the use of continuous reflective color strips or colored reflective optical fiber ribbons can achieve effective identification. Furthermore, the reflective optical fiber ribbon or reflective layer is highly solvent-resistant, making it suitable for use in more complex environments.

[0044] The method for preparing the reflective optical fiber ribbon provided by the present invention comprises the following steps:

[0045] Pre-curing: coating the outer sides of the optical fibers arranged side by side with a UV curable resin for forming a ribbon resin, and UV initiating the UV curable resin to obtain a pre-cured optical fiber ribbon;

[0046] Reflective layer coating: Coat a UV curable resin containing a reflective agent at a preset position of the pre-cured optical fiber ribbon and wait for leveling to obtain an optical fiber ribbon preform; the UV curable resin containing the reflective agent is evenly dispersed, preferably continuously stirred for more than 2 hours, the stirring temperature is 40-55°C, and the coating thickness is controlled at 10-20um, preferably 10-15um.

[0047] Curing: The optical fiber ribbon preform is subjected to UV initiation and cured to obtain the reflective optical fiber ribbon.

[0048] The reflective layer coating step occurs when the curing degree of the UV curable resin used to form the tape resin does not exceed 45%; the curing step occurs when the curing degree of the UV curable resin used to form the tape resin does not exceed 60%.

[0049] The optical fiber ribbon provided by the present invention is used in the production of optical devices, and the optical devices are typically optoelectronic integrated circuit board connectors and optical connectors.

[0050] The ribbon cable provided by the present invention comprises a cable core made of the reflective optical fiber ribbon provided by the present invention.

[0051] The following are examples:

[0052] Example 1: Externally wrapped reflective layer

[0053] The cross-sectional structure of the optical fiber ribbon provided in this embodiment is as follows: Figure 1 As shown in the figure, taking a 12-core optical fiber ribbon as an example, the optical fiber ribbon contains 12 optical fibers, which are coated with resin and wrapped with a reflective layer on the outside of the resin. The reflective layer is used to make the optical fiber ribbon reflective in dim light or indoor light, making it easy to identify.

[0054] The optical fiber cladding roundness (%) is ≤1.0%, the core cladding concentricity error (um) is ≤0.5%, the cladding diameter is about 80-125um, and the coating diameter after coloring is 160-250um.

[0055] The thickness of the tape resin is 10 μm, and the formula of the tape resin is: 20 to 70 parts of epoxy acrylate resin, 1 to 18 parts of photoinitiator and 0 to 12 parts of auxiliary agent.

[0056] The curing degree of the reflective layer resin is 80%, and the resin formula is: 94wt.% of acrylic optical fiber ribbon resin, 5wt.% of reflective agent, and 1wt.% of dispersant polyamide and polyglycol ether (1:4).

[0057] The method for manufacturing the reflective optical fiber ribbon provided in this embodiment includes the following steps:

[0058] Pre-curing: 12 optical fibers are released from the pay-off rack and enter the pressure coating mold after passing through the collection wheel. The mold is filled with coating resin. The optical fibers are wrapped with resin and enter the first curing furnace. The resin is UV-triggered using an LED-UV light source.

[0059] Reflective layer coating: When the curing degree of the ribbon resin does not exceed 45%, the optical fiber ribbon wrapped with the ribbon resin enters the next coating process. The surface of the optical fiber ribbon is evenly coated with a layer of UV curing resin containing a reflective agent with a thickness of 10μm to obtain an optical fiber ribbon preform;

[0060] Curing: Immediately enter the second curing oven, use LED-UV light source to perform secondary curing on the resin, and the produced reflective optical fiber ribbon is wound on the take-up rack to produce the reflective optical fiber ribbon.

[0061] Example 2: Reflective strip structure reflective optical fiber ribbon and ribbon cable

[0062] The cross-sectional structure of the optical fiber ribbon provided in this embodiment is as follows: Figure 2 As shown in the figure, taking a 12-core optical fiber ribbon as an example, there are 12 optical fibers in the optical fiber ribbon, which are coated with resin. A reflective layer with a reflective strip is embedded on the outside of the resin. The reflective layer is used to make the optical fiber ribbon reflective in dim light or indoor light, which facilitates identification. The width of the reflective layer is 50% of the width of the optical fiber ribbon.

[0063] The optical fiber cladding roundness (%) is ≤1.0%, the core cladding concentricity error (um) is ≤0.5%, the cladding diameter is about 80-125um, and the coating diameter after coloring is 160-250um.

[0064] The thickness of the tape resin is 30 μm, and the formula of the tape resin is: 20 to 70 parts of epoxy acrylate resin, 1 to 18 parts of photoinitiator and 0 to 12 parts of auxiliary agent.

[0065] The cured resin for the tape and reflective strip has a curing degree of 85%. The resin formula is: the curing degree of the reflective layer is 80%. The resin formula is: acrylic fiber tape resin 94wt.%, reflective agent 5wt.%, dispersant polyamide and polyglycol ether (1:4) 1wt.%. The reflective strip is embedded and has a thickness of 10μm.

[0066] The method for manufacturing the reflective optical fiber ribbon provided in this embodiment includes the following steps:

[0067] Pre-curing: 12 optical fibers are released from the pay-off rack and enter the pressure coating mold after passing through the collection wheel. The mold is filled with coating resin. The optical fibers are wrapped with resin and enter the first curing furnace. The resin is UV-triggered using an LED-UV light source.

[0068] Reflective strip coating: When the curing degree of the ribbon resin does not exceed 45%, the optical fiber ribbon wrapped with the ribbon resin enters the next coating process. The surface of the optical fiber ribbon is evenly coated with a reflective strip and a resin layer of the ribbon resin, which is evenly wrapped around the pre-cured optical fiber ribbon. The width of the reflective strip is 50% of the width of the optical fiber ribbon. The thickness of the reflective strip and the second resin layer is 10 μm, and the optical fiber ribbon preform is obtained.

[0069] Curing: The optical fiber ribbon embedded with the reflective strip enters the second curing furnace, where the resin is cured for the second time using an LED-UV light source. The produced reflective optical fiber ribbon is then rewound by a take-up rack to produce a reflective optical fiber ribbon.

[0070] The reflective fiber ribbon cable is made by using the produced optical fiber ribbon coated with the reflective layer. The structure is as follows: Figure 3 As shown. The cable type is a central tube optical cable, including a reflective optical fiber ribbon, fiber paste, loose tube, aramid non-metallic reinforcement layer and outer sheath. The reflective optical fiber ribbon is arrayed in the loose tube, which is composed of 8 12-core reflective optical fiber ribbons stacked together. The optical fiber ribbons are stacked in sequence and then pass through a fiber paste filling device. The fiber paste is filled outside the optical fiber ribbon bundle, and a small amount flows into the gap of the optical fiber ribbon. The filled optical fiber ribbon bundle is then passed through an extruder and a mold, and the extruded loose tube is then shaped after water cooling. The outer sheath is provided with two open cables. Depending on the situation, metal armor can be provided outside the aramid non-metallic reinforcement layer to improve the strength of the optical fiber.

[0071] It will be easily understood by those skilled in the art that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A reflective optical fiber ribbon, characterized in that: The optical fiber ribbon comprises a plurality of optical fibers arranged side by side, a ribbon resin covering the surface of the optical fibers, and a reflective layer embedded and combined with the ribbon resin; the reflective layer extends along the axial direction of the optical fiber ribbon; The reflective layer is formed by curing a UV curable resin containing a reflective agent, wherein the content of the reflective agent is 2-10 wt %, and the thickness of the reflective layer is 10-20 μm; the reflective agent is sericite powder with a particle size of 1-5 μm; When light shines on the reflective layer, it creates a mirror-like reflection effect, which is clearly different from the rest of the optical fiber ribbon.

2. The reflective optical fiber ribbon according to claim 1, wherein: The reflective layer matrix resin is the same type of resin as the tape resin, and the resin curing degree is between 80% and 95%.

3. The reflective optical fiber ribbon according to claim 1, wherein: The reflective layer is a structure wrapped around the outside or a light strip structure; When the reflective layer is a reflective strip structure, its width is 30% to 60% of the width of the optical fiber ribbon.

4. The reflective optical fiber ribbon according to claim 1, wherein: The UV curable resin containing the reflective agent is epoxy acrylate resin.

5. The reflective optical fiber ribbon according to claim 1, wherein: Contains 0.5-1 wt.% of dispersant, 0-0.5 wt.% of pigment, and / or 0.3-1.5 wt.% of additives; The dispersant is a combination of one or more of ammonium salt, modified trimethoxysilane, polyamide, polyglycol ether, and polydimethylsiloxane; The auxiliary agent includes a defoaming agent.

6. The reflective optical fiber ribbon according to claim 1, wherein: The strip resin is formed by curing a UV curable resin, and its thickness is 20-40 μm.

7. The reflective optical fiber ribbon according to claim 1, wherein: The strip resin is an epoxy acrylate resin, the Young's modulus of the strip resin is between 300 and 1000 MPa, and the elongation at break needs to be greater than 5%; the reflective layer is formed by coating the surface of the UV-initiated strip resin and UV-initiated curing.

8. The method for preparing the reflective optical fiber ribbon according to any one of claims 1 to 7, wherein: The following steps are involved: Pre-curing: coating the outer sides of the optical fibers arranged side by side with a UV curable resin for forming a ribbon resin, and UV initiating the UV curable resin to obtain a pre-cured optical fiber ribbon; Reflective layer coating: Coat the pre-cured optical fiber ribbon with UV curing resin containing reflective agent at the preset position and wait for it to level to obtain the optical fiber ribbon preform; Curing: The optical fiber ribbon preform is subjected to UV initiation and cured to obtain the reflective optical fiber ribbon.

9. The method for preparing the reflective optical fiber ribbon according to claim 8, wherein: The UV curable resin containing the reflective agent is evenly dispersed, and the coating thickness is controlled to be 10-20 μm; The reflective layer coating step occurs when the curing degree of the UV curable resin used to form the tape resin does not exceed 45%; the curing step occurs when the curing degree of the UV curable resin used to form the tape resin does not exceed 60%.

10. The method for preparing the reflective optical fiber ribbon according to claim 9, wherein: The stirring is continued for more than 2 hours at a stirring temperature of 40-55° C. to uniformly disperse the UV curable resin containing the reflective agent.

11. The method for preparing the reflective optical fiber ribbon according to claim 9, wherein: The coating thickness is controlled at 10~15um.

12. An optical device, characterized in that: The reflective optical fiber ribbon comprises the reflective optical fiber ribbon according to any one of claims 1 to 7, wherein the optical device is typically a connector of an optoelectronic integrated circuit board or an optical connector.

13. A ribbon cable, characterized in that: The reflective optical fiber ribbon comprises the reflective optical fiber ribbon according to any one of claims 1 to 7.

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