High-reliability optical fiber array

Abstract

The utility model discloses a high-reliability optical fiber array, the high-reliability optical fiber array comprises a substrate, a cover plate and a plurality of optical fibers, the substrate is provided with a plurality of first V-shaped grooves, one side, close to the substrate, of the cover plate is provided with a concave structure matched with the first V-shaped grooves, and the plurality of optical fibers are fixed through the first V-shaped grooves and the concave structure. The span of the first V-shaped groove is larger than the diameter of the optical fiber. The concave structure abuts against the optical fiber, stress is dispersed, single-point stress of contact between the cover plate and the optical fiber is improved, deformation of the cover plate after stress can be reduced, the thickness of an adhesive layer between the cover plate and the substrate is reduced, meanwhile, the span of the first V-shaped groove is larger than the diameter of the optical fiber, the sharp corner position of the substrate is made to avoid the optical fiber, and the stability of the optical fiber is improved. And adverse problems caused by stress concentration are avoided.

Description

Technical Field

[0001] This application relates to the field of optical fiber technology, and more specifically, to a high-reliability optical fiber array. Background Technology

[0002] As optical networks and data centers develop towards ultra-high speed, larger capacity, and integration, optical transceiver modules are also adopting solutions with smaller size and higher integration, and the demand for high-speed optical components with parallel transceiver capabilities is growing rapidly.

[0003] Fiber Arrays (FAs), due to their extremely high requirements for materials and processing technology, have become more expensive and have not seen widespread application in 10G speeds. However, with the rapid advancement of high-speed transmission such as 400G and 800G, high-density, small-volume FAs are arguably the most ideal solution. FA products are most commonly used in the packaging of planar optical waveguide splitters (PLCs) and arrayed waveguide gratings (AWGs). With the explosive growth of data traffic, the demand for fiber optic arrays in data centers and 5G commercialization is increasing rapidly, and FAs are also finding wider applications in MEMS systems, sensors, silicon photonics, and other fields.

[0004] A fiber optic array (FA) is an array formed by mounting a bundle of optical fibers or a strip of optical fibers at specified intervals on a V-groove substrate. The fabrication process involves placing the bare fiber portion (with the fiber coating removed) into the V-groove, pressing the cover plate (LID) with a pressure device, bonding it with adhesive, and finally grinding and polishing the surface to the required coupling angle and precision.

[0005] However, in actual production, the drawback of FA is that the cover plate is usually set as a flat surface. Figure 1 As shown in the figure, the cover plate and the substrate are bonded together with glue. After the cover plate and the substrate are combined, the cover plate is pressurized by the pressure device. The two points between the optical fiber and the V groove are fixed and the pressure is dispersed. However, the cover plate and the optical fiber are subjected to single-point force, which is prone to stress concentration and deformation.

[0006] Therefore, existing technologies need to be improved. Utility Model Content

[0007] The purpose of this application is to provide a high-reliability fiber optic array, which aims to solve the technical problem of how to prevent deformation of the cover plate and the optical fiber in the prior art.

[0008] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0009] This application provides a high-reliability fiber optic array, comprising:

[0010] A substrate, wherein the substrate is provided with a plurality of first V-grooves;

[0011] A cover plate, wherein the cover plate has a concave structure on the side near the substrate that mates with the first V-groove;

[0012] A plurality of optical fibers are fixed by the first V-groove and the concave structure, and the span of the first V-groove is greater than the diameter of the optical fiber.

[0013] In one embodiment, the concave structure includes a second V-groove, which is connected to the first V-groove to fix the optical fiber.

[0014] In one embodiment, the opening angle of the second V-groove is greater than the opening angle of the first V-groove.

[0015] In one embodiment, the second V-groove includes:

[0016] V-groove body, the V-groove body being used to connect with the optical fiber;

[0017] A V-groove extension body extends outward from the V-groove body so that the V-groove apex of the cover plate avoids the optical fiber.

[0018] In one embodiment, the concave structure includes an arc-shaped concave structure that is connected to the first V-groove to fix the optical fiber.

[0019] In one embodiment, the concave arc structure includes:

[0020] An arc-shaped body, which is used to connect with the optical fiber;

[0021] An arc-shaped extension extends outward from the arc-shaped body so that the sharp corners of the concave arc-shaped structure avoid the optical fiber.

[0022] In one embodiment, a plurality of the first V-grooves are arranged side by side.

[0023] In one embodiment, a plurality of the first V-grooves are arranged at equal intervals.

[0024] In one embodiment, the first V-groove is set to 2, 4, 8, 16, or 32.

[0025] In one embodiment, the optical fiber includes an optical fiber core and a coating layer wrapped around the optical fiber core, and the optical fiber inside the first V-groove and the concave structure is an optical fiber core without the coating layer.

[0026] In one embodiment, an adhesive layer is provided between the cover plate and the substrate, the adhesive layer being used to fix the optical fiber between the first V-groove and the concave structure.

[0027] In one embodiment, the distance between the substrate and the cover plate is 0.01-0.03 mm.

[0028] The beneficial effects of the high-reliability fiber optic array provided in this application are at least as follows:

[0029] This application discloses a high-reliability fiber optic array, comprising a substrate, a cover plate, and a plurality of optical fibers. The substrate has a plurality of first V-grooves, and the cover plate has a concave structure on the side near the substrate that mates with the first V-grooves. The optical fibers are fixed by the first V-grooves and the concave structure, and the span of the first V-grooves is greater than the diameter of the optical fibers. In this application, the concave structure abuts against the optical fibers, dispersing the force and improving the single-point force on the contact between the cover plate and the optical fibers. This reduces the deformation of the cover plate after being stressed and reduces the thickness of the adhesive layer between the cover plate and the substrate. At the same time, the span of the first V-grooves is greater than the diameter of the optical fibers, ensuring that the sharp corners of the substrate avoid the optical fibers, preventing stress concentration and potential problems. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of a specific embodiment of a fiber optic array in the prior art;

[0032] Figure 2 This is a schematic diagram of the structure of a high-reliability fiber optic array provided in an embodiment of this application;

[0033] Figure 3 This is a schematic diagram of the connection structure between the first V-groove and the second V-groove provided in an embodiment of this application;

[0034] Figure 4 A schematic diagram of a specific embodiment of the high-reliability fiber optic array provided in this application;

[0035] Figure 5 A schematic diagram of the connection structure between the first V-groove and the concave arc structure provided in the embodiments of this application.

[0036] The following are the labeling elements in the figure:

[0037] 100, Substrate; 200, Cover plate; 300, Optical fiber; 400, Adhesive layer; 110, First V-groove; 210, Concave structure; 220, Second V-groove; 230, Arc-shaped concave structure; 221, V-groove body; 222, V-groove extension; 223, Sharp corner; 231, Arc-shaped body; 232, Arc-shaped extension; θ1, Opening angle of the first V-groove; θ2, Opening angle of the second V-groove. Detailed Implementation

[0038] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0039] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it may be directly or indirectly located on that other component. When a component is referred to as "connected to" another component, it may be directly or indirectly connected to that other component. The terms "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate orientations or positions based on the accompanying drawings, and are for ease of description only, and should not be construed as limiting the technical solution. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. "A plurality" means two or more, unless otherwise explicitly defined.

[0040] Please see Figure 2 This embodiment provides a high-reliability fiber optic array, which includes: a substrate 100, a cover plate 200 and a plurality of optical fibers 300. The substrate 100 is provided with a plurality of first V-grooves 110. The cover plate 200 is provided with a concave structure 210 that cooperates with the first V-grooves 110 on the side near the substrate 100. The plurality of optical fibers 300 are fixed by the first V-grooves 110 and the concave structure 210, and the span of the first V-grooves 110 is greater than the diameter of the optical fiber 300.

[0041] In this embodiment, a concave structure 210 is provided on the side of the cover plate 200 near the substrate 100. The concave structure 210 matches the first V-groove 110 on the substrate 100 to form a fixed space for accommodating the optical fiber 300. The concave structure 210 abuts against the top of the optical fiber 300, thus dispersing and stabilizing the force, improving the single-point force on the contact between the cover plate 200 and the optical fiber 300, and reducing the deformation of the cover plate 200 after being stressed. In addition, the span of the first V-groove 110 is greater than the diameter of the optical fiber 300, that is, the position where the first V-groove 110 abuts against the optical fiber 300 is located inside the first V-groove 110, preventing the sharp corner 223 of the first V-groove 110 from avoiding the optical fiber 300, and avoiding stress concentration that could cause adverse problems. For example, in the fabrication process of an optical fiber array, the bare portion of the optical fiber 300, after the coating has been removed, is placed in a V-groove. The cover plate 200 (LID) is pressurized by a pressurizing device and bonded with an adhesive. Finally, the surface is ground and polished to the required coupling angle and precision. By preventing the sharp corner 223 of the first V-groove 110 from aligning with the optical fiber 300, it is possible to avoid problems arising from concentrated stress on the sharp corner 223 during the pressurization process.

[0042] Since the cover plate 200 has a recessed structure 210 on the side close to the substrate 100, some of the optical fibers 300 are housed inside the recessed structure 210. This reduces the distance between the cover plate 200 and the substrate 100. The cover plate 200 and the substrate 100 are bonded and fixed by this structural adhesive, which reduces the thickness of the adhesive layer between the cover plate 200 and the substrate 100, improves the effect of thermal stress caused by the difference in thermal expansion coefficients between the adhesive and the cover plate 200, and improves the temperature resistance of the product.

[0043] Furthermore, the concave structure 210 provides a clearly distinguishable adhesive surface, which improves adhesive performance.

[0044] Therefore, in this embodiment, the concave structure 210 abuts against the optical fiber 300, which disperses the force and improves the single-point force of the contact between the cover plate 200 and the optical fiber 300. This reduces the deformation of the cover plate 200 after being stressed and reduces the thickness of the adhesive layer between the cover plate 200 and the substrate 100. At the same time, the span of the first V-groove 110 is greater than the diameter of the optical fiber 300, so that the sharp corner 223 of the substrate 100 avoids the optical fiber 300, thus avoiding stress concentration and causing adverse problems.

[0045] Specifically, please refer to Figure 2 and Figure 3 The concave structure 210 includes a second V-groove 220, which is connected to the first V-groove 110 to fix the optical fiber 300.

[0046] In this embodiment, the concave structure 210 can be a second V-groove 220, that is, a second V-groove 220 is opened on the side of the cover plate 200 near the substrate 100, and the second V-groove 220 cooperates with the first V-groove 110 to restrict and fix the optical fiber 300.

[0047] Specifically, please refer to Figure 3 The opening angle θ2 of the second V-groove is greater than the opening angle θ1 of the first V-groove.

[0048] In this embodiment, since the span of the first V-groove 110 is greater than the diameter of the optical fiber 300, that is, the lower half of the optical fiber 300 is entirely placed in the first V-groove 110, and a portion of the upper half of the branch optical fiber 300 is also placed in the first V-groove 110, and the opening angle θ2 of the second V-groove is greater than the opening angle θ1 of the first V-groove, this ensures that the plane of the cover plate 200 near the substrate 100 is located on the substrate 100, avoiding the plane of the cover plate 200 near the substrate 100 from being inserted into the first V-groove 110, causing hard interference.

[0049] Specifically, please refer to Figure 3 The second V-groove 220 includes a V-groove body 221 and a V-groove extension 222. The V-groove body 221 is used to connect with the optical fiber 300. The V-groove extension 222 extends outward from the V-groove body 221 so that the V-groove tip 223 of the cover plate 200 avoids the optical fiber 300. In this embodiment, the V-groove extension 222 extends outward from the V-groove body 221. It can be understood that the V-groove extension 222 is the extension after the V-groove body 221 abuts against the optical fiber 300. The V-groove extension 222 can ensure that the V-groove tip 223 of the cover plate 200 avoids the optical fiber 300, thus preventing stress concentration and potential problems.

[0050] Specifically, please refer to Figure 4 and Figure 5 The concave structure 210 includes an arc concave structure 230, which is connected to the first V-groove 110 to fix the optical fiber 300.

[0051] In this embodiment, the concave structure 210 can be an arc groove, i.e., an arc concave structure 230. The arc concave structure 230 matches the first V groove 110 on the substrate 100. The arc concave structure 230 can abut against the optical fiber 300 through its own arc segment, which disperses the force and improves the single-point force of the contact between the cover plate 200 and the optical fiber 300, thereby reducing the deformation of the cover plate 200 after being subjected to force.

[0052] Specifically, please refer to Figure 5The concave arc structure 230 includes an arc body 231 and an arc extension 232. The arc body 231 is used to connect with the optical fiber 300. The arc extension 232 extends outward from the arc body 231 so that the sharp corner 223 of the concave arc structure 230 avoids the optical fiber 300.

[0053] In this embodiment, the arc-shaped extension 232 extends outward from the arc-shaped body 231. It can be understood that the arc-shaped extension 232 is the extension after the arc-shaped body 231 abuts against the optical fiber 300. The arc-shaped extension 232 allows the sharp corner 223 on the cover plate 200 to avoid the optical fiber 300, preventing stress concentration and potential problems. It should be understood that the arc-shaped extension 232 can be an arc-shaped groove, or it can be a straight planar groove; the specific structure of the arc-shaped extension 232 is not limited.

[0054] Specifically, please refer to Figure 2 Several first V slots 110 are arranged side by side.

[0055] Specifically, please refer to Figure 2 Several first V-grooves 110 are set at equal intervals.

[0056] Specifically, the number of first V-grooves 110 can be set to 1, 2, 4, 8, or 32. Correspondingly, the cover plate 200 is provided with a recessed structure 210 that matches the substrate 100 to achieve different application scenarios.

[0057] Specifically, please combine Figure 2 As shown, the optical fiber 300 includes an optical fiber 300 core and a coating layer wrapped around the optical fiber 300 core, and the optical fiber 300 inside the first V-groove 110 and the concave structure 210 is an optical fiber 300 core without the coating layer.

[0058] Specifically, please refer to Figure 2 An adhesive layer 400 is provided between the cover plate 200 and the substrate 100. The adhesive layer 400 is used to fix the optical fiber 300 between the first V-groove 110 and the concave structure 210. For example, the cover plate 200 and the substrate 100 can be bonded together with adhesive. Since the cover plate 200 has a concave structure 210, the upper half of the optical fiber 300 can be partially embedded in the concave structure 210, thereby reducing the adhesive layer 400 between the cover plate 200 and the substrate 100.

[0059] Optionally, please combine Figure 2 As shown, the distance between the substrate 100 and the cover plate 200 is 0.01-0.03 mm.

[0060] For example, the distance between the substrate 100 and the cover plate 200 is 0.01-0.03 mm. Here, the distance between the substrate 100 and the cover plate 200 can be understood as the thickness of the adhesive layer 400. For example, the distance between the substrate 100 and the cover plate 200 can be 0.01 mm, or the distance between the substrate 100 and the cover plate 200 can be 0.015 mm, or the distance between the substrate 100 and the cover plate 200 can be 0.02 mm, or the distance between the substrate 100 and the cover plate 200 can be 0.025 mm.

[0061] It is worth noting that by creating a recessed structure 210 in the cover plate 200, the thickness of the adhesive layer 400 between the substrate 100 and the cover plate 200 can be as low as 0.01 mm. This can greatly reduce the thickness of the adhesive layer, mitigate the impact of thermal stress caused by the difference in thermal expansion coefficients between the adhesive and the cover plate 200, and improve the product's temperature resistance.

[0062] In summary, this application discloses a high-reliability fiber optic array, comprising a substrate, a cover plate, and a plurality of optical fibers. The substrate has a plurality of first V-grooves, and the cover plate has a concave structure on the side near the substrate that mates with the first V-grooves. The optical fibers are fixed by the first V-grooves and the concave structure, and the span of the first V-grooves is greater than the diameter of the optical fibers. In this application, the concave structure abuts against the optical fibers, dispersing the force and improving the single-point force on the contact between the cover plate and the optical fibers. This reduces the deformation of the cover plate after being stressed and decreases the thickness of the adhesive layer between the cover plate and the substrate. Simultaneously, the span of the first V-grooves being greater than the diameter of the optical fibers ensures that the sharp corners of the substrate avoid the optical fibers, preventing stress concentration and potential problems.

[0063] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A high-reliability fiber optic array, characterized in that, include: A substrate, wherein the substrate is provided with a plurality of first V-grooves; A cover plate, wherein the cover plate has a concave structure on the side near the substrate that mates with the first V-groove; A plurality of optical fibers are fixed by the first V-groove and the concave structure, and the span of the first V-groove is greater than the diameter of the optical fiber.

2. The high-reliability fiber optic array as described in claim 1, characterized in that, The concave structure includes a second V-groove, which is connected to the first V-groove to fix the optical fiber.

3. The high-reliability fiber optic array as described in claim 2, characterized in that, The opening angle of the second V-groove is greater than that of the first V-groove.

4. The high-reliability fiber optic array as described in claim 2, characterized in that, The second V-groove includes: V-groove body, the V-groove body being used to connect with the optical fiber; V-groove extension body, the V-groove extension body extending outward from the V-groove body, so that the V-groove tip of the cover plate avoids the optical fiber.

5. The high-reliability fiber optic array as described in claim 1, characterized in that, The concave structure includes an arc-shaped concave structure, which is connected to the first V-groove to fix the optical fiber.

6. The high-reliability fiber optic array as described in claim 5, characterized in that, The concave arc structure includes: An arc-shaped body, which is used to connect with the optical fiber; An arc-shaped extension extends outward from the arc-shaped body so that the sharp corners of the concave arc-shaped structure avoid the optical fiber.

7. The high-reliability fiber optic array as described in claim 1, characterized in that, Several of the first V-grooves are arranged side by side.

8. The high-reliability fiber optic array as described in claim 1, characterized in that, The optical fiber includes an optical fiber core and a coating layer wrapped around the optical fiber core, and the optical fiber inside the first V-groove and the concave structure is an optical fiber core without the coating layer.

9. The high-reliability fiber optic array as described in claim 1, characterized in that, An adhesive layer is provided between the cover plate and the substrate, and the adhesive layer is used to fix the optical fiber between the first V-groove and the concave structure.

10. The high-reliability fiber optic array as described in claim 1, characterized in that, The distance between the substrate and the cover plate is 0.01-0.03 mm.

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