A high-power fiber array and fiber capillary assembly
By introducing first and second glass structures into the fiber array and capillary assembly, combined with adhesive bonding and perforation design, the problem of fiber end face ablation under high power was solved, achieving efficient optical coupling and low loss, simplifying the manufacturing process, and facilitating mass production.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- VLINK OPTICS CORPORATION
- Filing Date
- 2026-05-14
- Publication Date
- 2026-07-03
AI Technical Summary
Traditional fiber arrays and capillaries are prone to fiber end face ablation and carbonization under high power conditions, resulting in reduced coupling efficiency and increased insertion loss. Moreover, their manufacturing process is complex and difficult to scale up.
The first and second glass structures are used and are fixed to the end face of the fiber array or capillary with adhesive. Perforations are made in the glass to avoid adhesive in the optical path. Combined with an anti-reflection film to reduce reflection loss, the optical path can be made adhesive-free.
It effectively prevents fiber end face burn-out, improves coupling efficiency, reduces light loss, simplifies manufacturing process, and facilitates mass production.
Smart Images
Figure CN224457096U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of optical fiber technology, specifically to a high-power optical fiber array and an optical fiber capillary assembly. Background Technology
[0002] As optical communication networks evolve towards higher speeds, larger capacities, and lower power consumption, co-packaged optoelectronics (CPO) technology has become an important solution in the industry. In CPO applications, to achieve high-density, high-efficiency optoelectronic integration, fiber arrays (FAs) or fiber capillary assemblies are typically used as optical interfaces, with internal optical power reaching 200mW to 1000mW or even higher.
[0003] In traditional fiber optic arrays or fiber capillaries, the transmission fiber is typically fixed within a mounting base or capillary, and the end face of the mounting base or capillary is directly used for optical coupling after grinding and polishing. However, under actual high-power, long-term operating conditions, due to the high optical power density at the fiber end face, the polished surface is highly susceptible to ablation, carbonization, or even permanent damage caused by localized overheating. This damage not only severely reduces optical coupling efficiency and increases insertion loss but may also cause device failure, becoming a key bottleneck limiting the reliability of CPOs and high-power optical modules.
[0004] A high-power multi-fiber head is currently available, in which the ends of multiple optical fibers are flush with the capillary end face, and a separate fused silica sheet is bonded together using a deep-bonding optical adhesive. This structure solves the problems of decreased coupling efficiency and increased insertion loss to some extent. However, the fabrication process of this multi-fiber head is complex and difficult to operate. In particular, the deep-bonding optical adhesive has extremely high barriers to entry in ultra-precision optical manufacturing, requiring strict operating environment and bonding equipment, and is highly dependent on the operator's experience and skills, thus limiting its widespread application in actual production. Utility Model Content
[0005] The primary objective of this invention is to provide a high-power fiber array that is easy to manufacture, readily scalable, and effectively prevents the polished surface from burning under high-power light radiation.
[0006] The second objective of this invention is to provide an optical fiber capillary assembly that is easy to manufacture, readily scalable, and effectively prevents the polished surface from burning under high-power light radiation.
[0007] To achieve the aforementioned first objective, this utility model provides a high-power fiber optic array, comprising a mounting base, an optical fiber, a first glass, and a second glass. The mounting base is provided with a mounting hole and a first end face. The optical fiber includes a bare fiber portion, which is disposed within the mounting hole and extends towards the first end face of the mounting base. The end face of the bare fiber portion is flush with the first end face. The first glass is bonded to the first end face with adhesive. The first glass has a through-hole, which corresponds to the bare fiber portion. The diameter of the through-hole is larger than the diameter of the mounting hole, and the adhesive is located on the outer periphery of the through-hole. The second glass is disposed on the side of the first glass facing away from the mounting base, and the second glass seals the through-hole.
[0008] As can be seen from the above scheme, by setting a first glass and a second glass, it is beneficial to avoid the burning of the polished surface of the fiber array under high-power light radiation, thereby ensuring coupling efficiency; by using adhesive to bond the first glass and the fixing base, the operation is simple and convenient, and it is easier to implement on a large scale; by making a perforation in the first glass and placing the adhesive on the outer periphery of the perforation, the optical signal transmitted by the optical fiber passes through the perforation and penetrates the second glass, thereby realizing an adhesive-free optical path and avoiding the adhesive being burned by high power.
[0009] A further option is to provide anti-reflective coatings on both opposite sides of the second glass, with one side of the anti-reflective coating covering the perforation.
[0010] As can be seen from the above scheme, the above settings are beneficial to reducing the output loss and end-face reflection of the fiber array.
[0011] A further option is to fix the first and second glass panes together with adhesive or a light adhesive.
[0012] A further solution is to have the perforation and mounting hole coaxially aligned and connected.
[0013] A further option is that both the first and second glass panes are arranged parallel to the first end face.
[0014] To achieve the second objective mentioned above, this utility model provides an optical fiber capillary assembly, including a capillary, an optical fiber, a first glass, and a second glass. The capillary has a central hole and a second end face. The optical fiber includes a bare fiber portion, which is disposed in the center and extends towards the second end face. The end face of the bare fiber portion is flush with the second end face. The first glass is bonded to the second end face with adhesive. The first glass has a through hole, which is corresponding to the bare fiber portion. The diameter of the through hole is larger than the diameter of the central hole, and the adhesive is located on the outer periphery of the through hole. The second glass is disposed on the side of the first glass facing away from the capillary, and the second glass seals the through hole.
[0015] As can be seen from the above scheme, by setting a first glass and a second glass, it is beneficial to avoid the burning phenomenon of the second end face of the capillary under high-power light radiation, thereby ensuring coupling efficiency; by bonding the first glass and the capillary with glue, the operation is simple and convenient, and it is easier to implement on a large scale; by opening a perforation in the first glass and placing the glue on the outer periphery of the perforation, the optical signal transmitted by the optical fiber passes through the perforation and penetrates into the second glass, thereby realizing glue-free optical path and avoiding high power burning of the glue.
[0016] A further option is to provide anti-reflective coatings on both opposite sides of the second glass, with one side of the anti-reflective coating covering the perforation.
[0017] As can be seen from the above scheme, the above settings are beneficial to reducing the light output loss and end-face reflection of the fiber capillary assembly.
[0018] A further option is to fix the first and second glass panes together with adhesive or a light adhesive.
[0019] A further proposed solution is to have the perforation and the center hole coaxially aligned and connected.
[0020] A further option is that both the first and second glass panes are arranged parallel to the second end face. Attached Figure Description
[0021] Figure 1 This is a structural diagram of an embodiment of the high-power fiber optic array of this utility model.
[0022] Figure 2 This is an exploded view of an embodiment of the high-power fiber optic array of this utility model.
[0023] Figure 3 This is a top view of an embodiment of the high-power fiber optic array of this utility model.
[0024] Figure 4 yes Figure 3 Sectional view at point AA.
[0025] Figure 5 This is a structural diagram of an embodiment of the optical fiber capillary assembly of this utility model.
[0026] Figure 6 This is an exploded view of an embodiment of the optical fiber capillary assembly of this utility model.
[0027] Figure 7 This is a top view of an embodiment of the optical fiber capillary assembly of this utility model.
[0028] Figure 8 yes Figure 7 Sectional view at point BB.
[0029] Explanation of reference numerals in the attached figures:
[0030] 1-Fixed base, 11-Mounting hole, 12-First end face;
[0031] 2-Fiber optic cable, 21-Bare fiber section;
[0032] 3-First glass, 31-Perforation;
[0033] 4-Second glass, 41-Antireflective coating;
[0034] 5-Capillary tube, 51-Central hole, 52-Second end face.
[0035] The present invention will be further described below with reference to the accompanying drawings and embodiments. Detailed Implementation
[0036] High-power fiber optic array examples:
[0037] See Figures 1 to 4 This embodiment provides a high-power fiber optic array, including a mounting base 1, an optical fiber 2, a first glass 3, and a second glass 4.
[0038] The mounting base 1 is provided with a mounting hole 11 and a first end face 12. The first end face 12 is located on the front side of the mounting base 1. The mounting hole 11 extends through the mounting base 1 in the front-back direction and exits from the first end face 12. In one embodiment, the mounting base 1 can be integrally formed; in another embodiment, the mounting base includes a base and a cover plate, with the cover plate disposed on the base.
[0039] The optical fiber 2 includes a bare fiber portion 21 disposed at its front end, the bare fiber portion 21 having the outer cladding layer removed from the outer periphery of the optical fiber 2. The length of the bare fiber portion 21 is greater than the length of the mounting hole 11. The bare fiber portion 21 is inserted into the mounting hole 11 from the rear side of the mounting base 1 and extends towards the first end face 12 of the mounting base 1, the end face of the bare fiber portion 21 being flush with the first end face 12. The optical fiber 2 is fixed to the rear side of the mounting base 1 with adhesive, the adhesive being wrapped around the outer periphery of the cladding layer of the optical fiber 2 and / or the bare fiber portion 21.
[0040] The first glass 3 is bonded to the first end face 12 with adhesive, and the first glass 3 is arranged parallel to the first end face 12. The first glass 3 can be polygonal or circular, and in this embodiment, it is preferably rectangular. The size of the first glass 3 is slightly smaller than the size of the first end face 12. A through hole 31 is formed in the center of the first glass 3, and the through hole 31 extends through the thickness direction of the first glass 3. The through hole 31 is correspondingly arranged with the bare fiber portion 21. Specifically, the through hole 31 is coaxially arranged and connected with the mounting hole 11. The diameter of the through hole 31 is larger than the diameter of the mounting hole 11, that is, the diameter of the through hole 31 is larger than the diameter of the bare fiber portion 21, so that the adhesive between the first glass 3 and the first end face 12 is located on the outer periphery of the through hole 31, thereby ensuring that there is no adhesive in the optical path of the optical fiber 2 and avoiding the high-power optical signal from burning the adhesive.
[0041] The second glass 4 is disposed on the side of the first glass 3 facing away from the fixing base 1, and is parallel to the first glass 3. The shape and size of the second glass 4 match the shape and size of the first glass 3, and the thickness of the second glass 4 is greater than or equal to the thickness of the first glass 3. No holes are required in the second glass 4 to block the perforation 31 of the first glass 3. The optical signal transmitted by the optical fiber 2 can penetrate the second glass 4 after passing through the perforation 31.
[0042] To reduce light loss and end-face reflection in the fiber optic array, this embodiment provides anti-reflection coatings 41 on both opposite sides of the second glass 4, specifically on both the side of the second glass 4 facing the first glass 3 and the side facing away from the first glass 3. The anti-reflection coating 41 on the side facing the first glass 3 at least covers the perforation 31. Preferably, the entire side surface of the second glass 4 is coated with the anti-reflection coating 41, meaning the anti-reflection coating 41 covers the entire side surface of the second glass 4.
[0043] The first glass 3 and the second glass 4 are fixed by adhesive bonding or by using a gluing method. When adhesive bonding is used, the adhesive is located on the outer periphery of the perforation 31.
[0044] In this embodiment, the first glass 3 and the second glass 4 are first fixed together with glue or adhesive, and then the first glass 3 is bonded to the first end face 12.
[0045] In other embodiments, the first glass 3 is first bonded to the first end face 12, and then the second glass 4 is fixed to the side of the first glass 3 facing away from the first end face 12 by means of glue or adhesive.
[0046] exist Figure 4 In the process, the first end face 12 is inclined. Preferably, the first end face 12 intersects the bottom surface of the fixing base 1 at an acute angle, and the first end face 12 is the polished surface of the fiber array.
[0047] Example of an optical fiber capillary assembly:
[0048] See Figures 5 to 8 This embodiment provides an optical fiber capillary assembly, including a capillary tube 5, an optical fiber 2, a first glass 3, and a second glass 4.
[0049] A central hole 51 is provided inside the capillary tube 5, and the central hole 51 extends through the capillary tube 5 along the axial direction of the capillary tube 5. A second end face 52 is provided at the front end of the capillary tube 5, and one end of the central hole 51 extends out of the second end face 52. The second end face 52 is perpendicular to the axial direction of the capillary tube 5, or the second end face 52 intersects the axial direction of the capillary tube 5 at an acute angle. This embodiment takes the former as an example.
[0050] The optical fiber 2 includes a bare fiber portion 21 disposed at its front end. The bare fiber portion 21 is disposed within the central hole 51 and extends towards the second end face 52, with the end face of the bare fiber portion 21 being flush with the second end face 52. The optical fiber 2 is fixed to the rear end of the capillary tube 5 by adhesive.
[0051] The first glass 3 is bonded to the second end face 52 with adhesive, and the first glass 3 is parallel to the second end face 52. The first glass 3 can be polygonal or circular, and in this embodiment, it is preferably rectangular. The size of the first glass 3 is less than or equal to the outer diameter of the capillary 5. A through hole 31 is formed in the center of the first glass 3, and the through hole 31 extends through the thickness direction of the first glass 3. The through hole 31 is correspondingly arranged with the bare fiber portion 21. Specifically, the through hole 31 is coaxially arranged and connected with the central hole 51. The diameter of the through hole 31 is larger than the diameter of the central hole 51, that is, the diameter of the through hole 31 is larger than the diameter of the bare fiber portion 21, so that the adhesive between the first glass 3 and the second end face 52 is located on the outer periphery of the through hole 31, thereby ensuring that there is no adhesive in the optical path of the optical fiber 2 and avoiding the high-power optical signal from burning the adhesive.
[0052] The second glass 4 is disposed on the side of the first glass 3 facing away from the capillary 5, and both the first glass 3 and the second glass 4 are parallel to the second end face 52. The shape and size of the second glass 4 match the shape and size of the first glass 3, and the thickness of the second glass 4 is greater than or equal to the thickness of the first glass 3. No openings are needed in the second glass 4 to seal the perforation 31 of the first glass 3. The optical signal transmitted by the optical fiber 2 passes through the perforation 31 and then through the second glass 4.
[0053] To reduce light emission damage and end-face reflection in the fiber optic capillary assembly, an anti-reflection coating 41 is provided on both opposite sides of the second glass 4, that is, an anti-reflection coating 41 is provided on both the side of the second glass 4 facing the first glass 3 and the side facing away from the first glass 3. The anti-reflection coating 41 on the side facing the first glass 3 at least covers the perforation 31. Preferably, the anti-reflection coating 41 is coated on the entire side surface of the second glass 4, that is, the anti-reflection coating 41 covers the entire side surface of the second glass 4.
[0054] The first glass 3 and the second glass 4 are fixed by adhesive bonding or by using a gluing method. When adhesive bonding is used, the adhesive is located on the outer periphery of the perforation 31.
[0055] In this embodiment, the first glass 3 and the second glass 4 are first fixed together with glue or adhesive, and then the first glass 3 is bonded to the second end face 52.
[0056] In other embodiments, the first glass 3 is first bonded to the second end face 52, and then the second glass 4 is fixed to the side of the first glass 3 facing away from the second end face 52 by means of glue or adhesive.
[0057] In summary, this invention, by setting a first glass and a second glass, helps to avoid the burning of the polished surface of the fiber array under high-power light radiation, thereby ensuring coupling efficiency; the first glass and the fixing base are bonded with adhesive, which is simple and convenient to operate and easier to implement on a large scale; by opening a perforation in the first glass and placing the adhesive on the outer periphery of the perforation, the optical signal transmitted by the optical fiber passes through the perforation and penetrates the second glass, thereby achieving an adhesive-free optical path and avoiding the adhesive being burned by high power.
[0058] Finally, it should be emphasized that the above are only preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A high power fiber array comprising a holder and a fiber, the holder being provided with a mounting hole and a first end face, the fiber comprising a bare fiber portion, the bare fiber portion being arranged within the mounting hole and extending towards the first end face of the holder, an end face of the bare fiber portion being flush with the first end face, characterized in that, Also includes: A first glass element is bonded to the first end face with adhesive. The first glass element has a through hole, which is corresponding to the bare fiber portion. The diameter of the through hole is larger than the diameter of the mounting hole, and the adhesive is located on the outer periphery of the through hole. A second glass pane is disposed on the side of the first glass pane facing away from the mounting base, and the second glass pane blocks the perforation.
2. The high-power fiber optic array according to claim 1, characterized in that: An anti-reflective film is provided on both opposite sides of the second glass, with one side of the anti-reflective film covering the perforation.
3. The high-power fiber optic array according to claim 1, characterized in that: The first glass and the second glass are fixed by adhesive or gluing.
4. The high-power fiber optic array according to claim 1, characterized in that: The perforation is coaxially arranged and connected with the mounting hole.
5. The high-power fiber optic array according to any one of claims 1 to 4, characterized in that: Both the first glass and the second glass are arranged parallel to the first end face.
6. An optical fiber capillary assembly, comprising a capillary and an optical fiber, wherein the capillary has a central hole and a second end face, and the optical fiber includes a bare fiber portion disposed within the central hole and extending towards the second end face, the end face of the bare fiber portion being flush with the second end face, characterized in that, Also includes: A first glass element is bonded to the second end face with adhesive. The first glass element has a through hole, which is corresponding to the bare fiber portion. The diameter of the through hole is larger than the diameter of the central hole, and the adhesive is located on the outer periphery of the through hole. A second glass is disposed on the side of the first glass facing away from the capillary, and the second glass blocks the perforation.
7. The fiber optic capillary assembly according to claim 6, characterized in that: An anti-reflective film is provided on both opposite sides of the second glass, with one side of the anti-reflective film covering the perforation.
8. The fiber optic capillary assembly according to claim 6, characterized in that: The first glass and the second glass are fixed by adhesive or gluing.
9. The fiber optic capillary assembly according to claim 6, characterized in that: The perforation is coaxially arranged with and connected to the central hole.
10. The fiber optic capillary assembly according to any one of claims 6 to 9, characterized in that: Both the first glass and the second glass are arranged parallel to the second end face.