Tail fiber structure and optical fiber collimator

Abstract

The tail fiber structure comprises a capillary tube, an optical fiber and a glue injection groove, a mounting hole is arranged in the capillary tube in a penetrating manner, the optical fiber is arranged in the mounting hole, a laser cutting surface is arranged at one end of the optical fiber, and the laser cutting surface is formed at one end of the optical fiber through laser cutting so as to replace a grinding surface formed by grinding. The laser cutting face protrudes out of the side wall of the capillary tube, a glue injection groove is further formed in the side, away from the laser cutting face, of the capillary tube, and glue is injected into the glue injection groove and wraps the optical fiber so that the optical fiber can be connected with the capillary tube. By arranging the laser cutting surface at one end of the optical fiber, the installation of the optical fiber in the capillary tube is more convenient, and compared with the prior art of manufacturing an optical fiber grinding surface through a grinding process, the arrangement of the laser cutting surface is simpler and more convenient, the manufacturing process is effectively reduced, and the productivity is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pigtails, in particular to a pigtail structure and an optical fiber collimator. Background Art

[0002] Fiber collimators are key components in fiber-optic communication systems, converting diverging beams into parallel ones. Their primary function is to improve fiber transmission efficiency, reduce signal loss, and ensure stable transmission of optical signals. The performance of fiber collimators directly impacts the overall performance of fiber-optic communication systems, thus playing a crucial role in the field.

[0003] A fiber collimator is a device that precisely positions a fiber pigtail and a lens. It can convert the transmitted light in an optical fiber into collimated light (parallel light), or couple parallel (nearly parallel) light from the outside into a single-mode optical fiber.

[0004] Currently, the pigtail of a fiber collimator is generally ground by rotation or vibration through the contact between the grinding disc and the fiber end. The grinding process includes steps such as degumming, clamping, coarse grinding, fine grinding and polishing. The process also requires the use of grinding paper and grinding fluid of different particle sizes, and different grinding fixtures are required for different angles. This leads to the problems of cumbersome pigtail production process, high control difficulty and low productivity.

[0005] In view of this, the existing technology still needs to be improved and developed. Utility Model Content

[0006] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a pigtail structure and an optical fiber collimator, aiming to solve the problems of the existing pigtail structure in that the manufacturing process is complicated, the control is difficult and the yield is low.

[0007] The technical solutions adopted by the present invention to solve the technical problems are as follows:

[0008] A pigtail structure, comprising:

[0009] A capillary tube having a mounting hole extending therethrough;

[0010] An optical fiber is disposed in the mounting hole; one end of the optical fiber is provided with a laser cutting surface, and the laser cutting surface protrudes from the side wall of the capillary;

[0011] The glue injection groove is arranged on a side of the capillary away from the laser cutting surface; the glue injection groove is provided with adhesive for wrapping the optical fiber to connect the optical fiber to the capillary.

[0012] Furthermore, the inclination angle of the laser cutting surface is 0°-8°.

[0013] Furthermore, an opening is provided on one side of the glue injection groove, and a side of the glue injection groove opposite to the opening is an arc-shaped surface.

[0014] Furthermore, the glue injection groove is coaxially arranged with the mounting hole.

[0015] An optical fiber collimator, comprising the above-mentioned pigtail structure, further comprising:

[0016] A glass tube; the capillary tube and the optical fiber are arranged inside the glass tube and located at one end of the glass tube;

[0017] The lens is arranged inside the glass tube and located at an end of the glass tube away from the pigtail; a gap is provided between the lens and the capillary tube, and the laser cutting surface of the optical fiber is located in the gap.

[0018] Furthermore, one end of the glass tube where the capillary is located is provided with a bonding portion to connect the capillary, the optical fiber and the glass tube.

[0019] Furthermore, one end of the capillary tube away from the lens protrudes from the glass tube to form a step at one end of the glass tube.

[0020] Furthermore, the bonding portion is tapered.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] In the present invention, a mounting hole is provided through the interior of the capillary, an optical fiber is provided in the mounting hole, and a laser cutting surface is provided at one end of the optical fiber. The laser cutting surface is formed by laser cutting at one end of the optical fiber to replace the polished surface formed by grinding, and the laser cutting surface protrudes from the side wall of the capillary. A glue injection groove is also provided on the side of the capillary away from the laser cutting surface, and glue is injected into the glue injection groove. The glue wraps the optical fiber to connect the optical fiber with the capillary; by providing a laser cutting surface at one end of the optical fiber, the installation of the optical fiber in the capillary is more convenient, and compared with the prior art of producing the optical fiber polished surface through a grinding process, the laser cutting surface provided in the present application is simpler and more convenient, effectively reducing the production process and improving productivity. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the capillary and optical fiber structure of the utility model.

[0024] Figure 2 This is a schematic diagram of the capillary structure of the utility model.

[0025] Figure 3 This is a structural diagram of the optical fiber collimator of the utility model.

[0026] The numbers in the figure indicate: 1, capillary; 11, mounting hole; 12, glue injection groove; 2, optical fiber; 21, laser cutting surface; 3, glass tube; 4, lens; 5, gap; 6, bonding part. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and effect of the present invention more clear and explicit, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0028] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0029] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0030] In the prior art, the portion of the optical fiber 2 located in the capillary 1 is the core with the outer sheath removed, and the core is generally made of glass. The grinding process generally involves rotating or vibrating the grinding disc and one end of the core. During the grinding process, the core is subjected to the force caused by the grinding, and when the end of the core protrudes too long from the capillary 1, it is easy to break during grinding. When the end of the core is located in the capillary 1, the grinding requires a longer process, so the head position of the core needs to be coordinated with the capillary 1 to facilitate subsequent grinding and ensure smooth grinding, which will also result in more complicated steps during assembly. At the same time, when the core is ground, the capillary 1 will also be ground, and the debris produced by the grinding of the capillary 1 will also affect the judgment and viewing of the core end face during grinding, which will also cause the fiber pigtail production process to take a long time.

[0031] In view of the shortcomings of the existing technology, this embodiment provides a pigtail structure and a fiber collimator, which can be specifically described as follows:

[0032] As attached Figure 1 and attached Figure 2 As shown, a pigtail structure includes a capillary 1, an optical fiber 2 and a glue injection groove 12. The capillary 1 is made of resin and is cylindrical. A mounting hole 11 is provided in the center thereof. The mounting hole 11 is coaxially arranged with the capillary 1. The optical fiber 2 is placed in the mounting hole 11 of the capillary 1. A laser cutting surface 21 is provided at one end of the optical fiber 2. The laser cutting surface 21 is an end face formed after cutting by a laser device. The optical performance requirements of the end face are consistent with the optical performance requirements of the end face formed by the grinding process. The laser cutting surface 21 protrudes from the side wall of the capillary 1 to facilitate laser cutting. A glue injection groove 12 is provided on the side of the capillary 1 away from the laser cutting surface 21. Glue is provided inside the glue injection groove 12, and part of the optical fiber 2 is also located in the glue injection groove 12. The adhesive in the adhesive groove 12 wraps the optical fiber 2 and solidifies it, thereby connecting the optical fiber 2 to the capillary 1 to form a new pigtail structure; the pigtail structure is more convenient for the installation of the optical fiber 2 in the capillary 1 by setting a laser cutting surface 21 at one end of the optical fiber 2, and compared with the prior art that uses a grinding process to make the polished surface of the optical fiber 2, the present application only needs to use a laser equipment to laser cut one end of the optical fiber 2, and the processing method and process are simpler and more convenient, effectively reducing the production process and improving productivity; at the same time, compared with the assembly method of the pigtail structure in the prior art, the optical fiber 2 of the present application only needs to protrude one end of the optical fiber 2 from the side wall of the capillary 1 by a certain distance, thereby simplifying the assembly process between the optical fiber 2 and the capillary 1 and improving assembly efficiency.

[0033] Furthermore, the optical fiber 2 protruding from one end of the capillary 1 is the core without the outer sheath, and the core is located in the mounting hole 11 and partially located in the glue injection groove 12. The glue injection groove 12 contains the core with the outer sheath partially removed and the optical fiber 2 with the outer sheath not removed.

[0034] Furthermore, the diameter of the mounting hole 11 is the same as the core diameter of the optical fiber 2 , that is, the optical fiber 2 with the outer sheath cannot penetrate into the mounting hole 11 , thereby avoiding malfunctions during pigtail assembly.

[0035] In this application, an embodiment is shown in the attached Figure 1 As shown, the laser cutting surface 21 is a bevel, and the inclination angle is 0°-8°; the laser cutting surface 21 is formed by laser cutting. By adjusting the laser equipment, the end face of the optical fiber 2 can be cut at a required angle, and the optical performance requirements equivalent to the grinding process can also be achieved.

[0036] Furthermore, the assembly efficiency of the pigtail can be improved by setting a laser cutting surface 21; specifically, a certain length of optical fiber 2 can be cut and removed by the laser cutting equipment, and the part of the optical fiber 2 protruding from the capillary 1 can be cut and trimmed. At the same time, there is no need to worry about the optical fiber 2 breaking, thereby improving the assembly efficiency of the pigtail.

[0037] In this embodiment, an opening is provided on one side of the glue injection groove 12, which facilitates the injection of glue into the glue injection groove 12; and the side of the glue injection groove 12 opposite to the opening is an arc-shaped surface, and the top of the arc-shaped surface cooperates with the mounting hole 11. Through the setting of the arc-shaped surface, the optical fiber 2 can be conveniently inserted into the mounting hole 11.

[0038] In this embodiment, the glue injection groove 12 is a cylindrical groove, and one side of the curved surface in the glue injection groove 12 is shaped like a "bullet head". The glue injection groove 12 is coaxially arranged with the mounting hole 11, which can effectively improve the stability between the capillary 1 and the optical fiber 2.

[0039] As attached Figure 3 As shown, the present application also provides a fiber collimator, including the pigtail structure as described above, and also including a glass tube 3 and a lens 4; the capillary 1 and the optical fiber 2 are arranged inside the glass tube 3 and located at one end of the glass tube 3, the outer diameter of the capillary 1 is the same as the inner diameter of the glass tube 3, and the two cooperate with each other; the inner principle of the glass tube 3 is provided with a lens 4 on one side of the capillary 1, and a gap 5 is provided between the lens 4 and the capillary 1, and the laser cutting surface 21 of the optical fiber 2 is located in the gap 5.

[0040] In this embodiment, the lens 4 and the glass tube 3 are both conventional technologies.

[0041] In this embodiment, the end of the glass tube 3 where the capillary 1 is provided is provided with an adhesive portion 6 , which covers the capillary 1 , the optical fiber 2 and the end of the glass tube 3 to fix the capillary 1 , the optical fiber 2 and the glass tube 3 .

[0042] In this embodiment, one end of the capillary 1 away from the lens 4 protrudes from the glass tube 3 to form a step at one end of the glass tube 3. The bonding portion 6 is arranged on the side wall of the glass tube 3 and wraps around the crooked capillary 1 that protrudes from the glass tube 3. Through this step structure, the stability between the capillary 1 and the glass tube 3 can be effectively reinforced.

[0043] Furthermore, the bonding portion 6 is formed by curing glue and has a cone shape, which not only improves the aesthetics of the optical fiber collimator but also reduces the use of materials while ensuring the overall stability of the optical fiber collimator.

[0044] In summary, the present application provides a pigtail structure and an optical fiber collimator, wherein the pigtail structure includes a capillary tube 1 and an optical fiber 2, and the optical fiber collimator includes a glass tube 3, a pigtail structure, and a lens 4. Specifically, the optical fiber 2 is first stripped of its outer sheath, and then the optical fiber 2 without the outer sheath is inserted into the mounting hole 11, with the portion protruding from the side wall of the capillary tube 1. Then, adhesive is injected into the adhesive injection groove 12 to fix the optical fiber 2 to the capillary tube 1. Then, a laser cutting device is used to cut the optical fiber 2 protruding from the capillary tube 1, so as to form a laser cutting surface 21 at one end of the optical fiber 2, thereby completing the processing of the pigtail structure.

[0045] After the pigtail structure is completed, the pigtail structure can be placed in the glass tube 3 and sealed and fixed by the adhesive part 6. Then, the lens 4 is placed at the other end of the glass tube 3, and a gap 5 is set between the lens 4 and the pigtail structure. The laser cutting surface 21 of the optical fiber 2 is located in the gap 5. Then, the lens 4 and the glass tube 3 are sealed and fixed to complete the assembly of the optical fiber collimator.

[0046] Those skilled in the art will readily conceive of other embodiments of the present invention after considering the specification and practicing the embodiments disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention that adhere to the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered as exemplary only; the true scope and spirit of the invention are indicated by the claims.

Claims

1. A pigtail structure, characterized in that: include: A capillary tube having a mounting hole extending therethrough; An optical fiber is disposed in the mounting hole; one end of the optical fiber is provided with a laser cutting surface, and the laser cutting surface protrudes from the side wall of the capillary; The glue injection groove is arranged on a side of the capillary away from the laser cutting surface; the glue injection groove is provided with adhesive for wrapping the optical fiber to connect the optical fiber to the capillary.

2. A pigtail structure according to claim 1, characterized in that: The inclination angle of the laser cutting surface is 0°-8°.

3. A pigtail structure according to claim 1, characterized in that: An opening is provided on one side of the glue injection groove, and a side of the glue injection groove opposite to the opening is an arc-shaped surface.

4. A pigtail structure according to claim 3, characterized in that: The glue injection groove is coaxially arranged with the mounting hole.

5. An optical fiber collimator, comprising a pigtail structure according to any one of claims 1 to 4, characterized in that: Also includes: A glass tube; the capillary tube and the optical fiber are arranged inside the glass tube and located at one end of the glass tube; The lens is arranged inside the glass tube and located at an end of the glass tube away from the pigtail; a gap is provided between the lens and the capillary tube, and the laser cutting surface of the optical fiber is located in the gap.

6. The optical fiber collimator according to claim 5, characterized in that: One end of the glass tube where the capillary is provided is provided with a bonding portion to connect the capillary, the optical fiber and the glass tube.

7. The optical fiber collimator according to claim 6, characterized in that: One end of the capillary tube away from the lens protrudes from the glass tube to form a step at one end of the glass tube.

8. The optical fiber collimator according to claim 6, characterized in that: The bonding portion has a tapered shape.

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