Optical transmitter subassembly with mounting structure

Abstract

This utility model discloses a light-emitting sub-module assembly with an installation structure, including an adapter, a sleeve, and a laser connected in sequence. The adapter, sleeve, and laser all have circular cross-sections. The outer diameter of the laser is larger than the outer diameter of the sleeve. A positioning sleeve is provided on the outer circumference of the sleeve. The positioning sleeve includes a circular inner groove for bonding to the outer wall of the sleeve with adhesive. One end of the circular inner groove has a first limiting ring with a reduced diameter, and the other end has a second limiting ring with a larger diameter. The first limiting ring fits into the expanding diameter ring on the outer circumference of the adapter, and the second limiting ring fits into the bottom surface of the laser. The bottom surface of the laser is also connected to the end face of the sleeve. This utility model achieves precise connection between the adapter and the laser at both ends of the sleeve through the positioning sleeve structure and the adhesive bonding, combined with the first and second limiting rings, preventing loosening.

Description

Technical Field

[0001] This application relates to the field of optical communication device technology, and more specifically, to an optical emission submodule assembly with an installation structure. Background Technology

[0002] The Optical Transmitter Submodule (TOSA), as the core component of the optical transmission module, plays a crucial role in converting electrical signals into optical signals. Its typical structure consists of an adapter, a sleeve, and a laser: the adapter acts as the fiber optic interface to achieve optical path coupling; the sleeve is used for the precision assembly of the laser and the optical fiber; and the laser completes the electro-optic conversion through coaxial encapsulation. In existing technologies, because the adapter, sleeve, and laser are all independent circular cross-section components, assembly relies solely on simple mechanical fit, resulting in significant technical drawbacks: First, the diameter difference between the laser and the sleeve leads to unstable axial positioning, easily causing displacement under vibration; second, the lack of an effective radial constraint mechanism allows for relative rotation between components; and third, the overall installation process relies on manual alignment, making it impossible to achieve rapid positioning through mechanical structures and ensuring repeatable assembly accuracy. These problems directly result in low component yield and limited production efficiency. Especially in mass production scenarios, the positioning defects of traditional structures significantly increase debugging time and scrap costs. Currently, the industry urgently needs an integrated solution that can simultaneously address axial positioning, radial constraint, and rapid assembly issues. Existing technologies urgently need improvement to address these problems. Utility Model Content

[0003] The purpose of this application is to provide a light-emitting sub-module assembly with an installation structure, which has the advantages of improving axial positioning stability, enhancing radial constraint capability, and enabling rapid assembly.

[0004] This application provides a light-emitting sub-module assembly with an installation structure, including an adapter, a sleeve, and a laser connected in sequence. The adapter, sleeve, and laser all have circular cross-sections. The laser's outer diameter is larger than the sleeve's outer diameter. The sleeve has a positioning sleeve on its outer periphery. The positioning sleeve includes a circular inner groove that is glued to the outer wall of the sleeve. One end of the circular inner groove has a first limiting ring with a reduced diameter, and the other end has a second limiting ring with a larger diameter. The first limiting ring fits into the expanding diameter ring on the outer periphery of the adapter, and the second limiting ring fits into the bottom surface of the laser. The bottom surface of the laser is also connected to the end face of the sleeve.

[0005] The positioning sleeve has an integrally extended mounting piece along the outer periphery of the second limiting ring, and positioning holes are provided on both sides of the mounting piece.

[0006] The inner side of the first limiting ring is provided with a through hole for the adapter to pass through, and the inner diameter of the through hole is adapted to the outer diameter of the adapter.

[0007] The diameter of the expanding ring is larger than the inner diameter of the through hole.

[0008] As can be seen from the above, the optical emission sub-module assembly with an installation structure provided in this application achieves axial fixation and radial constraint between the laser and the sleeve through the circular inner groove of the positioning sleeve and the cooperation structure of the first limiting ring and the second limiting ring. At the same time, the size matching between the expansion ring and the through hole ensures the installation accuracy of the adapter. It has the advantages of improving axial positioning stability, enhancing radial constraint capability and realizing rapid assembly. Attached Figure Description

[0009] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0010] Figure 1 This is a three-dimensional structural diagram of a light-emitting sub-module assembly with an installation structure according to the present invention;

[0011] Figure 2 This is a three-dimensional structural diagram of the optical emission sub-module component in this utility model;

[0012] Figure 3 This is a schematic diagram of the three-dimensional structure of the positioning sleeve in this utility model. Detailed Implementation

[0013] The following will refer to the appendix to this application. Figure 1-3 The technical solutions in this application are clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. The components of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application. It should be noted that similar reference numerals and letters in the following drawings indicate similar items; therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0014] In existing technologies, the optical emission submodule assembly, as the core component of the optical transmission module, includes an optical fiber interface component, a sleeve, and a laser. Due to the lack of an effective positioning structure between the components, positional misalignment or loosening can easily occur during assembly, leading to reduced optical path coupling efficiency. Especially in high-precision assembly scenarios, existing technologies rely on repeated manual adjustments of component positions, which is not only time-consuming and labor-intensive but also prone to optical power loss or wavelength shift due to assembly errors.

[0015] To address these issues, researchers discovered that the lack of axial positioning between components was a key factor leading to assembly instability. Analysis revealed that the diameter difference between the sleeve and the laser was not being effectively utilized, and the contact surface between the adapter and the sleeve lacked a reliable limiting structure. Based on this, the research team proposed adding a positioning sleeve with a double-limiting structure to the outside of the sleeve. This utilizes the diameter difference to form a stepped mating surface, while simultaneously achieving dual axial positioning through a limiting ring.

[0016] Therefore, this application proposes a light-emitting sub-module assembly with an installation structure, including an adapter 6, a sleeve 9, and a laser 8 connected in sequence. The adapter 6, sleeve 9, and laser 8 all have circular cross-sections. The outer diameter of the laser 8 is larger than the outer diameter of the sleeve 9. A positioning sleeve 5 is provided on the outer periphery of the sleeve 9. The positioning sleeve 5 includes a circular inner groove 3 that is glued to the outer wall of the sleeve 9. One end of the circular inner groove 3 is provided with a necked first limiting ring 12, and the other end is provided with an expanded diameter second limiting ring 13. The first limiting ring fits and connects to the expanded diameter ring 10 on the outer periphery of the adapter, and the second limiting ring 13 fits and connects to the bottom surface of the laser. The bottom surface of the laser is also connected to the end face of the sleeve.

[0017] The circular inner groove refers to an annular groove that matches the shape of the outer wall of the sleeve, and is fixedly connected to the sleeve by filling it with epoxy resin. The first limiting ring is the reduced-diameter structure at the axial end of the inner groove, used to form a surface contact with the expanding-diameter ring of the adapter. The second limiting ring is the expanding-diameter structure at the other end of the inner groove, which can be formed into an annular step by a flanging process to support the bottom surface of the laser. The expanding-diameter ring is an annular boss extending outward from the outer circumference of the adapter, which can be formed by turning, and its diameter is larger than the inner diameter of the through hole to ensure limiting contact.

[0018] Specifically, during assembly, the positioning sleeve is radially fixed by adhesive bonding between its inner groove and the outer wall of the sleeve. After the first limiting ring contacts the adapter's expanding ring, it restricts the axial displacement of the adapter towards the laser. After the second limiting ring contacts the bottom surface of the laser, it restricts the axial displacement of the laser towards the adapter. The direct contact between the sleeve end face and the bottom surface of the laser forms a third positioning point; together, these three elements constitute the axial positioning system. When subjected to vibration or temperature changes, the cooperation between the double limiting rings and the expanding ring effectively disperses stress and prevents relative displacement between components.

[0019] Compared to existing technologies, traditional structures rely on a single contact surface between the sleeve and the adapter for positioning, lacking constraint on the bottom surface of the laser. This solution utilizes a double-limiting structure of the positioning sleeve to create two independent constraint surfaces axially, which, combined with the diameter difference between the laser and the sleeve, forms a self-centering effect. This design not only eliminates manual adjustments during assembly but also enhances the structural stability of the component under complex operating conditions through a three-point positioning system.

[0020] Through the above technical solution, this application achieves rapid and precise assembly of the optical emission sub-module assembly, effectively preventing axial movement of components under vibration. The double-limiting structure, with end-face contact between the laser and the sleeve, ensures optical axis alignment accuracy and reduces optical power loss due to assembly errors. The adhesive bonding method between the positioning sleeve and the sleeve enhances the overall structural rigidity and avoids stress concentration problems that may occur with traditional threaded connections.

[0021] The positioning sleeve 5 is provided with an integrally extended mounting piece 7 along the outer periphery of the second limiting ring 13, and the mounting piece 7 is provided with positioning holes 4 on both sides.

[0022] The mounting plate refers to a plate-shaped extension component that forms a continuous structure with the positioning sleeve. It can be formed simultaneously with the positioning sleeve using a metal stamping process. Its function is to provide an external fixing point for the entire component. The positioning hole refers to a circular hole that passes through both sides of the mounting plate. It can be processed using drilling or punching processes and is used to form a rigid connection with the external fixing bracket through bolts.

[0023] Specifically, the outer surface of the second limiting ring of the positioning sleeve extends integrally to form a mounting plate. Positioning holes on both sides of the mounting plate engage with positioning pins on the external mounting substrate. During assembly, the mounting plate connects to external clamps or fixing brackets through the positioning holes, ensuring the optical emission submodule assembly maintains spatial stability during welding or potting processes. The integrated structure of the mounting plate and positioning sleeve avoids the assembly gaps present in traditional separate mounting components, ensuring the coaxiality of the laser, sleeve, and adapter.

[0024] Through the above technical solution, this application solves the problem of missing positioning reference during the installation of optical emission sub-module components. The fixed interface formed by the mounting plate and the positioning hole can be directly connected to automated equipment to achieve precise alignment between the fiber optic interface component and the laser, while improving the assembly consistency during mass production.

[0025] The first limiting ring 12 has a through hole 11 on its inner side for the adapter 6 to pass through, and the inner diameter of the through hole 11 is adapted to the outer diameter of the adapter 6. The diameter of the expanding ring 10 is larger than the inner diameter of the through hole 11.

[0026] The through hole refers to the through structure located inside the first limiting ring. Its inner diameter matches the outer diameter of the adapter. This can be achieved through precision machining to ensure a tight fit when the adapter passes through. The expansion ring refers to the radial protrusion structure formed on the outer circumference of the adapter. It can be formed by metal stamping or injection molding and forms an axial limit through the difference in size between the expansion ring and the inner diameter of the through hole.

[0027] Specifically, when the adapter passes through the through hole, its outer surface forms a surface contact with the inner wall of the through hole. The outer diameter of the expanding ring is larger than the inner diameter of the through hole, causing the adapter to be blocked by the expanding ring during axial movement. This structure forms a fixed connection between the adapter and the positioning sleeve, preventing lateral displacement during assembly. The gap between the inner wall of the through hole and the outer wall of the adapter can be controlled within the micrometer range.

[0028] Compared to existing technologies, traditional optical emission sub-modules lack a rigid positioning structure between the adapter and the sleeve, relying solely on manual calibration for fixation. This makes them prone to optical path misalignment due to assembly errors. This solution utilizes a through-hole that aligns with the adapter's dimensions to form a mechanical limiting structure, allowing the adapter to automatically correct its position during installation without requiring additional adjustments.

[0029] Through the above technical solution, this application achieves rapid and accurate positioning of the adapter and the positioning sleeve, eliminating positional deviations caused by manual assembly. The fit between the expansion ring and the through hole effectively restricts the axial movement of the adapter, preventing loosening of the connection due to vibration or temperature changes, thereby improving optical signal coupling efficiency and long-term stability of the component.

[0030] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A light-emitting submodule assembly with an installation structure, comprising an adapter (6), a sleeve (9), and a laser (8) connected in sequence, wherein the adapter (6), sleeve (9), and laser (8) all have circular cross-sections, characterized in that: The outer diameter of the laser (8) is larger than the outer diameter of the sleeve (9). The outer circumference of the sleeve (9) is provided with a positioning sleeve (5). The positioning sleeve (5) includes a circular inner groove (3) that is glued to the outer wall of the sleeve (9). One end of the circular inner groove (3) is provided with a first limiting ring (12) with a reduced diameter, and the other end is provided with a second limiting ring (13) with an expanded diameter. The first limiting ring is fitted to the expanding diameter ring (10) on the outer circumference of the adapter, and the second limiting ring (13) is fitted to the bottom surface of the laser. The bottom surface of the laser is also connected to the end face of the sleeve.

2. The optical emission submodule assembly with mounting structure according to claim 1, characterized in that: The positioning sleeve (5) has an integrally extended mounting piece (7) along the outer periphery of the second limiting ring (13), and the mounting piece (7) has positioning holes (4) on both sides.

3. The optical emission sub-module assembly with mounting structure according to claim 1, characterized in that: The first limiting ring (12) has a through hole (11) for the adapter (6) to pass through, and the inner diameter of the through hole (11) is adapted to the outer diameter of the adapter (6).

4. The optical emission submodule assembly with mounting structure according to claim 1, characterized in that: The diameter of the expansion ring (10) is larger than the inner diameter of the through hole (11).

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