Subminiature double-core connection interface for optical module and optical module

Abstract

The utility model provides a subminiature double-core connection interface for an optical module and the optical module. The subminiature double-core connection interface comprises an alignment metal piece, a ceramic insertion core, a ceramic sleeve, an insertion core metal piece and a limiting buckle, wherein an optical fiber is embedded in the ceramic insertion core, and the ceramic sleeve wraps the ceramic insertion core. Wherein the optical fiber penetrates through the limiting buckle and the ferrule metal piece and then is embedded into the ceramic ferrule, the ceramic sleeve wraps the ceramic ferrule and is embedded into the alignment metal piece, a groove is formed in one end of the ferrule metal piece, the ferrule metal piece and the ceramic ferrule are riveted and fixed through the groove, the other end of the ferrule metal piece is sleeved with the spring, and a groove is formed in one end of the alignment metal piece. And the groove is locked with the limiting buckle. According to the utility model, ultrahigh-density connection can be realized, so that the optical module is miniaturized, the butt joint loss of optical fibers can be reduced, and materials and labor are saved.

Description

Technical Field

[0001] The utility model relates to the technical field of optical communication optical module active connection, in particular to a super-small dual-core connection interface for an optical module and an optical module. Background Art

[0002] In recent years, with the rapid development of cloud servers and AI, the rate of optical modules has increased from 10G to the current highest 1.6T, and the corresponding data centers are getting larger and larger. As the core infrastructure of modern information technology, the data center undertakes the tasks of massive data storage, processing and transmission, and is an important support for information transformation in all walks of life. Therefore, how to meet the requirements of higher-density connector assembly and smaller size of optical modules has become an urgent problem to be solved.

[0003] At present, the optical transmission of optical modules mainly adopts single-channel Receptacle or multi-channel MT connection methods. Among them, the single-channel Receptacle connects to an LC connector, and the ferrule pitch of the LC connector is 6.25mm, which cannot achieve ultra-high-density connection. For the integrated multi-channel MT connection, in the production process, there are differences in each optical fiber, and the butt joint loss is also 1 time higher than that of a single connector. The internal of the existing Receptacle connectors are all fixed by riveting. When docking, it completely relies on the spring retraction inside the LC connector, which makes the optical fiber surface easy to be damaged. And after the damage, the Receptacle cannot be disassembled and the optical fiber cannot be repaired, resulting in waste of materials and labor, and also increasing the attenuation of the transmission link, thus affecting the stability of the communication system. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is: to provide a small dual-core connection interface for an optical module, which solves the problems in the prior art that the connector cannot simultaneously meet ultra-high-density connection and low butt joint loss, and the repair operation is relatively complicated after the optical fiber in the connector is damaged.

[0005] To solve the above problems, the technical solution proposed by the utility model is: a small dual-core connection interface for an optical module, including an alignment metal part, a ceramic ferrule with an optical fiber embedded inside, a ceramic sleeve wrapped outside the ceramic ferrule, a ferrule metal part and a limit buckle. Among them: the optical fiber passes through the limit buckle and the ferrule metal part and then is embedded into the ceramic ferrule; the ceramic sleeve wraps the ceramic ferrule and is embedded into the alignment metal part; one end of the ferrule metal part is provided with a groove and is riveted and fixed to the ceramic ferrule through the groove, and a spring is sleeved on the other end; one end of the alignment metal part is provided with a groove and is locked with the limit buckle through the groove.

[0006] Further, the alignment metal part is an oval structure with planes on both sides, and there are two circular hole shafts with adjustable axial distances inside. The ceramic ferrule and the ceramic sleeve are assembled inside the circular hole shafts. One end of the alignment metal part is provided with a platform, and grooves adapted to the limit buckles are respectively arranged on two side surfaces of the platform.

[0007] Further, the ceramic ferrule includes an inner hole for embedding an optical fiber and one end is provided with a chamfered structure.

[0008] Further, the ceramic sleeve is a C-shaped open structure, includes an inner hole for embedding the ceramic ferrule, and the inner diameter of the inner hole is smaller than the outer diameter of the ceramic ferrule.

[0009] Further, the ferrule metal part is a structure of two coaxial cylindrical hollow bodies, and its cross-section is T-shaped. A groove for riveting and fixing with the ceramic ferrule is arranged at the horizontal end of the T-shape, and the outer diameter size of the vertical end of the T-shape is the size that restricts the spring to move only axially.

[0010] Further, one end of the spring abuts against the ferrule metal part, and the other end abuts against the limit buckle.

[0011] Further, the ceramic ferrule and the optical fiber are fixedly bonded by glue embedded inside the ceramic ferrule; the ferrule metal part and the optical fiber are fixedly bonded by glue embedded at the tail of the ferrule metal part.

[0012] Further, it further includes a dust cap. The dust cap is a structure of two coaxial cylinders, and its cross-section is T-shaped. One of the cylinders is hollow, and reinforcing ribs are arranged around it, which is adapted to the alignment metal part.

[0013] Further, the limit buckle is equipped with a corresponding fixture for opening the buckle that locks the limit buckle and the alignment metal part.

[0014] Another aspect of the present utility model provides an optical module including a plurality of ultra-small dual-core connection interfaces. The optical module includes a plurality of the ultra-small dual-core connection interfaces, and the housing is provided with grooves corresponding to the ultra-small dual-core connection interfaces. The number of grooves is preset according to actual application requirements.

[0015] Advantages of the present utility model: An ultra-small dual-core connection interface for an optical module provided by the present utility model mainly includes an alignment metal part, a ceramic ferrule, a ceramic sleeve, a ferrule metal part and a spring, which can realize ultra-high density connection of optical fibers and reduce the butt joint loss of optical fibers, and can also conveniently repair damaged optical fibers, thereby reducing the waste of materials and labor during optical fiber butt joint.

[0016] Further, the planes on both sides of the alignment metal part can increase the stability during butt joint;

[0017] Furthermore, the axial distance between the axes of the two circular holes of the alignment metal part is precisely adjustable, with a minimum of 3.1 mm, which can not only ensure the accuracy of the insertion position of the ceramic ferrule but also meet the requirements of ultra-high-density connections;

[0018] Furthermore, a chamfer is provided at one end of the ceramic ferrule, which can achieve precise docking of the inner hole during docking;

[0019] Furthermore, the ceramic sleeve adopts a C-shaped opening structure, has a certain toughness, and the inner diameter is smaller than the outer diameter of the ceramic ferrule. There is a certain retraction when the ceramic ferrule is embedded, which can achieve a very good wrapping effect;

[0020] Furthermore, the structure of the present utility model can be axially flipped and docked by 180°;

[0021] Furthermore, the dust cap is provided with a ribbed structure, which can avoid the influence of dust entering the fiber end face on fiber transmission due to excessive internal air pressure of the dust cap when the alignment metal part is inserted into the dust cap. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a sectional view structure diagram of the product of the present utility model;

[0023] Figure 2 It is an exploded view of the connector of the present utility model;

[0024] Figure 3 It is a schematic diagram of the locking of the alignment metal part and the limit buckle in an embodiment of the present utility model;

[0025] Figure 4 It is a schematic diagram of the axial distance of the ceramic ferrule in an embodiment of the present utility model;

[0026] Figure 5 It is a schematic diagram of the tail of the connection interface in an embodiment of the present utility model;

[0027] Figure 6 It is a schematic diagram of a dual-row four-channel optical module in an embodiment of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] In order to make the objectives, technical solutions, and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0029] It should be noted that the illustrations provided in the embodiments of the present utility model only schematically illustrate the basic concept of the present utility model. Therefore, only the components related to the present utility model are shown in the drawings, rather than being drawn according to the number, shape, and size of the components in actual implementation. The type, quantity, and proportion of each component in actual implementation can be arbitrarily changed, and the component layout type may also be more complex.

[0030] In the present utility model, it should also be noted that when terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application. In addition, when terms such as "first" and "second" appear, they are only used for descriptive and differentiating purposes, and cannot be construed as indicating or implying relative importance.

[0031] The ultra-small dual-core connection interface of the present utility model can achieve ultra-high density connection by adjusting the core pitch. At the same time, the spring and limit buckle device in the structure can effectively reduce the butt joint loss of the optical fiber, saving materials and labor.

[0032] Embodiment 1

[0033] This embodiment provides an ultra-small dual-core connection interface for an optical module, as Figure 2 shown, including an alignment metal part 1, a ceramic ferrule 2, a ceramic sleeve 3, a ferrule metal part 4, a spring 5, a limit buckle 6, an optical fiber 7, glue 8, and a dust cap 9.

[0034] Specifically, the positional relationship of each component is as Figure 1 shown: The optical fiber 7 passes through the limit buckle 6, and the ferrule metal part 4 is embedded inside the ceramic ferrule 2. Among them, the ceramic ferrule 2 and the optical fiber 7 are bonded and fixed by the glue 8 embedded inside the ceramic ferrule 2, and the ferrule metal part 4 and the optical fiber 7 are bonded and fixed by the glue 8 embedded at the tail of the ferrule metal part 4; the ceramic sleeve 3 wraps the ceramic ferrule 2 and is embedded inside the alignment metal part 1; one end of the ferrule metal part 4 is riveted and fixed to the ceramic ferrule 2, and the other end is sleeved with a spring 5; one end of the spring 5 abuts against the ferrule metal part 4, and the other end abuts against the limit buckle 6; one end of the alignment metal part 1 is locked with the limit buckle 6 through a groove, and the other end is fitted with a dust cap 9.

[0035] Specifically, the alignment metal part 1 has an oval shape with flat surfaces on both sides, which can increase stability and wear resistance during butt joint. One end of the alignment metal part 1 is provided with a platform, and the side of the platform is provided with a groove that can be locked with the limit buckle 6.

[0036] Specifically, there are two round hole shafts with adjustable axle distances inside the alignment metal part 1. When the axle distance is adjusted to 3.1 mm, it is the minimum axle distance, and a dual-core SN connector is used for docking; when the axle distance is adjusted to 6.25 mm, a dual-core LC connector is used for docking. Controlling the axle distance can also limit the axial movement of the ceramic sleeve 3 during the plugging and unplugging process.

[0037] Specifically, the ceramic ferrule 2 is an LC ferrule with an outer diameter of 1.249 ± 0.0005 mm and an inner diameter of 0.1255 - 0.1265 mm. The structure with a 30° chamfer at the front end can play the role of accurate guiding and precise docking.

[0038] Specifically, the ceramic sleeve 3 adopts a C-shaped open structure and has a certain toughness. During docking, the ceramic ferrule 2 and the ceramic sleeve 3 have a certain amount of retraction, which can reduce the risk of damage to the optical fiber end face of the ceramic ferrule 2. The inner diameter of the ceramic sleeve 3 is set to 1.246 - 1.248 mm, which can play a better alignment and wrapping role when the ceramic ferrule 2 is inserted.

[0039] Specifically, the cross-section of the ferrule metal part 4 is T-shaped. The outer diameter of the horizontal end of the T shape is 2.3 mm, and it has a groove structure, which can be riveted and fixed with the ceramic ferrule 2. The outer diameter of the vertical end of the T shape is set to 1.9 mm, which restricts the movement of the spring 5 only in the axial direction. The inner diameter of the vertical end of the T shape is set to 0.6 mm, which plays a role in fixing the optical fiber.

[0040] Specifically, the spring 5 is sleeved on the ferrule metal part 4. When the limit buckle 6 is locked with the grooves on both sides of the alignment metal part 1, one end of the spring 5 abuts against the limit buckle 6, and the other end abuts against the ferrule metal part 4, elastically pushing the ferrule metal part 4 to move towards the alignment metal part 1 during docking.

[0041] Specifically, when the alignment metal part 1 and the limit buckle are locked as Figure 3 shown, the docking process is as follows: the limit buckle 6 approaches the grooves of the alignment metal part 1, the limit buckle 6 expands slightly outwards until the front end of the limit buckle 6 falls into the front groove of the alignment metal part 1, and the expansion of the limit buckle 6 resets, clamping both sides of the alignment metal part 1 to complete the locking.

[0042] Specifically, the dust cap 9 is composed of two coaxial cylinder structures with a T-shaped cross-section. There are four reinforcing ribs around the ellipse to prevent dust from entering the optical fiber end face due to excessive internal air pressure in the dust cap 9 when the alignment metal part 1 is inserted into the dust cap, which affects the transmission of light.

[0043] Specifically, the compression and stretching of the spring 5 can relieve the extrusion suffered by the ceramic ferrule 2 during docking, thereby reducing the docking damage to the optical fiber 8 embedded therein.

[0044] Specifically, the buckle of the limit buckle 6 can be opened through a corresponding fixture, so as to repair the damaged end face of the optical fiber 8 inside in time.

[0045] Embodiment 2

[0046] This embodiment provides an assembly method for a super-small dual-core connection interface for an optical module. Components such as Figure 2 as shown, including an alignment metal part 1, a ceramic ferrule 2, a ceramic sleeve 3, a ferrule metal part 4, a spring 5, a limit buckle 6, an optical fiber 7, glue 8, and a dust cap 9, specifically including the following steps:

[0047] Step 1: Bond the optical fiber 7 and the ceramic ferrule 2 with glue 8 and heat-cure them. Polish the end face of the optical fiber 7 and check for damage.

[0048] Step 2: Put the ceramic sleeve 3 on the outer cylinder of the ceramic ferrule 2 and place the whole into the inner hole of the alignment metal part 1.

[0049] Step 3: Pass the optical fiber 7 through the ferrule metal part 4, and rivet and fix the ferrule metal part 4 and the ceramic ferrule 2. After completion, bond and fix the optical fiber 7 and the ferrule metal part 4 with glue 8.

[0050] Step 4: Put the spring 5 on one end of the ferrule metal part 4.

[0051] Specifically, the outer diameter of the ferrule metal part 4 restricts the spring to move only axially.

[0052] Step 5: Lock the limit buckle 6 and the alignment metal part 1, as Figure 3 shown.

[0053] Specifically, the groove of the alignment metal part 1 and the buckle of the limit buckle 6 cooperate with each other, that is, the limit buckle 6 expands slightly outwards until the buckle falls into the groove of the alignment metal part 1, and the expansion of the limit buckle 6 resets, and the buckle locks the groove.

[0054] Specifically, after the limit buckle 6 and the alignment metal part 1 are locked, the spring 5 is compressed, with one end pressing against the ferrule metal part 4 and the other end pressing against the limit buckle 6.

[0055] Step 6: Put the dust cap 9 on one end of the alignment metal part 1 to complete the assembly of the super-small dual-core connection interface.

[0056] Specifically, the dust cap 9 is put on the end of the alignment metal part 1 where no optical fiber protrudes.

[0057] Embodiment 3

[0058] This embodiment provides a dual-row four-channel optical module, as Figure 6 shown.

[0059] Specifically, the optical module in this embodiment adopts the ultra-small dual-core connection interface for the optical module described in Embodiment 1. The optical module housing reserves two groups of grooves at specified positions. By placing two ultra-small dual-core connection interfaces for the optical module into the grooves, a double-row four-channel arrangement can be achieved. It should be noted that in this embodiment, there can be multiple groups of grooves reserved in the optical module housing, and multiple dual-core connectors can be placed into the grooves.

[0060] An ultra-small dual-core connection interface for an optical module proposed by the present utility model mainly includes an alignment metal part, a ceramic ferrule, a ceramic sleeve, a ferrule metal part, a spring, and a limit buckle. The optical fiber passes through the limit buckle, and the ferrule metal part is embedded in the ceramic ferrule. The ceramic sleeve wraps the ceramic ferrule and is embedded in the alignment metal part. The axial distance of the ceramic ferrule is adjustable, enabling ultra-high density connection. The spring compresses when the limit buckle is locked with the alignment metal part, playing a role in protecting the optical fiber. At the same time, the limit buckle can be opened through a corresponding fixture when the optical fiber is damaged, realizing convenient optical fiber repair.

[0061] It should be understood that for those of ordinary skill in the art, improvements or transformations can be made according to the above description, and all such improvements and transformations should fall within the protection scope of the appended claims of the present utility model.

Claims

1. An ultra-small dual-core connection interface for an optical module, characterized in that: It comprises an alignment metal part (1), a ceramic ferrule (2) with an optical fiber (7) embedded therein, a ceramic sleeve (3) wrapped outside the ceramic ferrule (2), a ferrule metal part (4) and a limit buckle (6); wherein: The optical fiber (7) passes through the limiting buckle (6) and the ferrule metal part (4) and is then embedded in the ceramic ferrule (2); the ceramic sleeve (3) wraps the ceramic ferrule (2) and is embedded in the alignment metal part (1); one end of the ferrule metal part (4) is provided with a groove and is riveted and fixed to the ceramic ferrule (2) through the groove, and the other end is sleeved with a spring (5); one end of the alignment metal part (1) is provided with a groove and is locked with the limiting buckle (6) through the groove.

2. The ultra-small dual-core connection interface for an optical module according to claim 1, characterized in that: The alignment metal part (1) is an elliptical structure with flat surfaces on both sides, and has two circular hole shafts with adjustable wheelbase inside. The ceramic ferrule (2) and the ceramic sleeve (3) are assembled in the circular hole shafts. A platform is provided at one end of the alignment metal part (1), and grooves adapted to the limit buckle (6) are respectively provided on two side surfaces of the platform.

3. The ultra-small dual-core connection interface for an optical module according to claim 1, characterized in that: The ceramic ferrule (2) comprises an inner hole in which the optical fiber (7) is embedded and one end of the ceramic ferrule (2) is provided with a chamfered structure.

4. The ultra-small dual-core connection interface for an optical module according to claim 1, characterized in that: The ceramic sleeve (3) is a C-shaped opening structure, comprising an inner hole embedded in the ceramic insert (2), and the diameter of the inner hole is smaller than the outer diameter of the ceramic insert (2).

5. The ultra-small dual-core connection interface for an optical module according to claim 1, characterized in that: The ferrule metal part (4) is a structure of two coaxially arranged cylindrical hollow bodies, and has a T-shaped cross section. The horizontal end of the T is provided with a groove for riveting and fixing the ceramic ferrule (2), and the outer diameter of the vertical end of the T is such that the spring (5) is limited to move in the axial direction only.

6. The ultra-small dual-core connection interface for an optical module according to claim 1, characterized in that: One end of the spring (5) is pressed tightly against the insert metal piece (4), and the other end is pressed tightly against the limit buckle (6).

7. The ultra-small dual-core connection interface for an optical module according to claim 1, characterized in that: The ceramic ferrule (2) and the optical fiber (7) are bonded and fixed by means of glue (8) embedded in the ceramic ferrule (2); the ferrule metal part (4) and the optical fiber (7) are bonded and fixed by means of glue (8) embedded in the tail of the ferrule metal part (4).

8. The ultra-small dual-core connection interface for an optical module according to claim 1, characterized in that: It comprises a dust cap (9), which is two coaxially arranged cylindrical structures with a T-shaped cross-section, one of the cylinders is hollow and has reinforcing ribs arranged around it, and is adapted to the alignment metal piece (1).

9. The ultra-small dual-core connection interface for an optical module according to claim 1, characterized in that: The limiting buckle (6) is equipped with a corresponding clamp for opening the buckle that locks the limiting buckle (6) and the alignment metal part (1).

10. An optical module using the ultra-small dual-core connection interface according to any one of claims 1 to 9, characterized in that: The optical module includes a plurality of the ultra-small dual-core connection interfaces, and the housing is provided with grooves corresponding to the ultra-small dual-core connection interfaces, and the number of the grooves is preset according to actual application requirements.

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