Receptacle and box coupling welding apparatus and method for polarization maintaining optical fiber

Abstract

This invention relates to the field of optical communication device packaging technology, and discloses a polarization-maintaining fiber receptacle and box coupling welding equipment and method, including a fixture module, a polarization-maintaining fiber vision module, and a lens coupling module, a receptacle coupling module, and a welding module distributed around the fixture module. This layout makes the coupling welding equipment more compact, reduces its space occupation, and improves the production efficiency of coupling welding, ensuring the product quality of optical module products. By first coupling the lens and receptacle inside the box simultaneously and then completing the welding of the receptacle to the box, the coupling optical power value is higher and the optical loss is lower, which can meet the mass production of optical module products with transmission rates of 400G and above, significantly improving the overall production yield and efficiency, and reducing costs.

Description

Technical Field

[0001] This invention relates to the field of optical communication device packaging technology, specifically to a device and method for coupling and bonding a Receptacle with polarization-maintaining fiber to a Box. Background Technology

[0002] In the optical communication industry, passive welding is commonly used for welding Receptacle (optical socket / receiver) and Box (optical module housing / box). When Receptacle is configured with LC, FC and other types of pigtail connectors, optical power coupling calibration is usually performed on both before welding is carried out.

[0003] However, this coupling welding process is only suitable for optical module products with a transmission rate of 400G and below. For high-speed optical modules above 400G, the requirements for the precision of the coupled optical power are higher, and the control standards for optical loss are more stringent. Using the existing process will result in a significantly lower product yield, making it difficult to meet the needs of large-scale mass production.

[0004] Meanwhile, for Receptacle with polarization-maintaining fiber, the extinction ratio (PER) needs to be automatically coupled and tested during the production process, a technical requirement that cannot be met by existing equipment. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a device and method for coupling and welding a receptacle with polarization-maintaining fiber to a box. First, the lens and receptacle inside the box are coupled simultaneously through a lens coupling module and a receptacle coupling module, and then the welding module is used to complete the welding of the receptacle to the box. Compared with the original production process of first mounting the lens inside the box and then coupling and welding the receptacle to the box, the coupling optical power value is higher and the optical loss is lower, so as to meet the mass production of optical module products with transmission rates of 400G and above.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] In a first aspect, the present invention proposes a Receptacle and Box coupling welding device with polarization-maintaining fiber, including a fixture module. A Lens coupling module, a Receptacle coupling module and a welding module are arranged around the periphery of the fixture module. A polarization-maintaining fiber vision module is arranged on the side of the fixture module close to the Receptacle coupling module. The polarization-maintaining fiber vision module is used to perform fiber optic cat's eye recognition on the Receptacle.

[0008] The welding module includes a laser welding gun for welding the contact position of the receptacle and the box; the fixture module includes a box clamping assembly for clamping the box; the receptacle coupling module includes a receptacle clamp for holding the receptacle; and the lens coupling module includes a lens gripper assembly for holding the lens. A side-view camera assembly for identifying the laser in the lens and the box is also provided on one side of the lens gripper assembly.

[0009] First, the Lens and Receptacle inside the Box are coupled simultaneously using the Lens coupling module and the Receptacle coupling module, respectively. Then, the Receptacle is welded to the Box using the welding module.

[0010] Optionally, the Box clamp assembly and the Lens gripper assembly can move synchronously in the horizontal direction, and the rear ends of the Box clamp assembly and the Lens gripper assembly are respectively provided with a first drive adjustment component and a second drive adjustment component that are independent of each other.

[0011] Optionally, the fixture module and the Lens coupling module are mounted on the same base, and a horizontal transfer shaft capable of driving the base to move in the horizontal direction is provided below the base.

[0012] Optionally, the first drive adjustment component includes a pose adjustment component mounted on the base, the output end of the pose adjustment component is connected to the Box clamp assembly, and the pose adjustment component is used to adjust the pose of the Box clamp assembly relative to the base.

[0013] Optionally, the second drive adjustment component includes a coupling transfer axis mounted on the base, the output end of the coupling transfer axis is connected to a coupling angle axis, the output end of the coupling angle axis is connected to the Lens gripper assembly, and the coupling transfer axis and the coupling angle axis work together to adjust the position of the Lens gripper assembly relative to the base.

[0014] Optionally, the Receptacle coupling module further includes a horizontal transfer module, the output end of which is connected to a Z-axis transfer module, the output end of which is equipped with a support plate, and the Receptacle fixture passes through the support plate and can rotate around its own axis.

[0015] Optionally, the bottom of the laser welding gun is provided with a third drive adjustment component for adjusting its position and posture, and the laser welding gun is tilted.

[0016] Optionally, multiple sets of welding modules are provided, and the multiple sets of welding modules, along with the Lens coupling module and the Receptacle coupling module, are alternately distributed around the periphery of the fixture module.

[0017] Optionally, the polarization-maintaining fiber optic vision module includes an industrial camera, a magnification-adjustable eyepiece, and an objective lens connected in sequence. The industrial camera is located between the Receptacle coupling module and the fixture module, and the objective lens is located on top of the magnification-adjustable eyepiece.

[0018] Secondly, a method for coupling and welding a receptacle with polarization-maintaining fiber to a box is proposed, using the receptacle and box coupling and welding equipment with polarization-maintaining fiber described in the first aspect, including the following steps:

[0019] S1. Power the optical module product and determine whether the laser of the optical module product is normal through current feedback;

[0020] S2. After the laser of the optical module product is normal, the side-view camera component on the Lens coupling module takes pictures and identifies the laser in the Lens and Box in sequence. At the same time, the Receptacle is moved above the polarization-maintaining fiber vision module through the Receptacle coupling module to perform fiber optic cat's eye recognition and adjust the angle of the Receptacle.

[0021] S3. Grab the Lens using the Lens gripper component on the Lens coupling module and move it to the initial coupling position in the Box. At the same time, move the Receptacle to the initial coupling position using the Receptacle fixture on the Receptacle coupling module.

[0022] S4, Lens, and Receptacle are coupled simultaneously and the optical power is coupled to the acceptable value. Then, the angle of Receptacle is rotated to couple the extinction ratio to the acceptable value.

[0023] S5. Multiple sets of welding module moving laser welding guns perform multi-angle and position welding at the contact position between Receptacle and Box to fix Receptacle and Box together, completing the coupling welding of the optical module product.

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0025] (1) In this invention, the Lens coupling module, Receptacle coupling module and welding module are distributed around the jig module, making the structure of the coupling welding equipment more compact and reducing its occupation of installation space. The Lens and Receptacle inside the Box are coupled simultaneously by the Lens coupling module and Receptacle coupling module before the welding module is used to complete the welding of the Receptacle to the Box. Compared with the original production process, its coupling optical power value is higher and the optical loss is lower, which can meet the mass production of optical module products with a transmission rate of 400G or higher. This process equipment can significantly improve the overall production yield and efficiency and reduce costs. This equipment can be widely promoted and is convenient for mass production in enterprises.

[0026] (2) In this invention, for the case where the extinction ratio of the Receptacle with polarization-maintaining fiber needs to be coupled, the position and angle of the cat's eye in the polarization-maintaining fiber are identified by the polarization-maintaining fiber vision module and then the Receptacle coupling module is used to realize the automatic coupling of the extinction ratio of the product, which helps customers complete the development and mass production of new product processes. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of the Receptacle and Box coupling welding device with polarization-maintaining fiber in an embodiment of the present invention;

[0028] Figure 2 This is a schematic diagram of the structure of the fixture module and the Lens coupling module in an embodiment of the present invention;

[0029] Figure 3 This is a schematic diagram of the Receptacle coupling module in an embodiment of the present invention;

[0030] Figure 4 This is a schematic diagram of the welding module in an embodiment of the present invention;

[0031] Figure 5 This is a schematic diagram of the polarization-maintaining fiber optic vision module in an embodiment of the present invention;

[0032] Among them, 100 is the jig module; 101 is the pose adjustment component; and 102 is the Box fixture component.

[0033] 200. Lens coupling module; 201. Coupled transfer axis; 202. Coupled angle axis; 203. Lens gripper assembly; 204. Side-view camera assembly;

[0034] 300. Receptacle coupling module; 301. Horizontal transfer module; 302. Z-axis transfer module; 303. Support plate; 304. Receptacle fixture; 305. Rotary axis; 306. Optical power meter;

[0035] 400. Welding module; 401. Support; 402. Sliding plate; 403. Mounting plate; 404. Transfer assembly; 405. Laser welding gun;

[0036] 500. Polarization-maintaining fiber optic vision module; 501. Industrial camera; 502. Magnification-adjustable eyepiece; 503. Objective lens;

[0037] 600, horizontal transfer shaft; 700, base. Detailed Implementation

[0038] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. These drawings are simplified schematic diagrams, which are only used to illustrate the basic structure of the present invention and therefore only show the components relevant to the present invention.

[0039] Example 1, as Figure 1 As shown, a receptacle coupled to a box with polarization-maintaining fiber is provided for welding. The receptacle includes a fixture module 100, a lens coupling module 200, a receptacle coupling module 300, a welding module 400, and a polarization-maintaining fiber vision module 500. The fixture module 100 is used to clamp the box. The lens coupling module 200 is used to couple the lens to the box. The receptacle coupling module 300 is used to couple the receptacle to the box. The welding module 400 is used to weld the receptacle and the box at multiple angles. The polarization-maintaining fiber vision module 500 is used to identify the position and angle of the fiber optic peephole of the receptacle with polarization-maintaining fiber. In conjunction with the receptacle coupling module 300, the extinction ratio of the product is automatically coupled.

[0040] As described above, the Lens coupling module 200, Receptacle coupling module 300, and welding module 400 are distributed around the periphery of the fixture module 100, with the fixture module 100 located at the center. The polarization-maintaining fiber vision module 500 is positioned on the side of the fixture module 100 closest to the Receptacle coupling module 300. This layout makes the coupling welding equipment more compact, reduces its space requirements, and improves the production efficiency of coupling welding, ensuring the product quality of the optical module.

[0041] Specifically, the Lens and Receptacle inside the Box are first coupled simultaneously using Lens coupling module 200 and Receptacle coupling module 300, and then the Receptacle is welded to the Box using welding module 400. Compared with the original production process, this process has a higher coupling optical power value and lower optical loss, which can meet the mass production requirements of optical module products with a transmission rate of 400G or higher. This process equipment can significantly improve the overall production yield and efficiency, and reduce costs. This equipment can be widely promoted and is convenient for mass production in enterprises.

[0042] like Figure 1 and Figure 2 As shown, the jig module 100 includes a Box clamp assembly 102 for clamping the Box, and the Lens coupling module 200 includes a Lens gripper assembly 203 for holding the Lens. A side-view camera assembly 204 for identifying the Lens and the laser in the Box is also provided on one side of the Lens gripper assembly 203. The jig module 100 and the Lens coupling module 200 are mounted on the same base 700. A horizontal transfer shaft 600 that can drive the base 700 to move in the horizontal direction is provided below the base 700.

[0043] As described above, the Box clamp assembly 102 and the Lens gripper assembly 203 can move synchronously in the horizontal direction, and the rear ends of the Box clamp assembly 102 and the Lens gripper assembly 203 are respectively provided with a first drive adjustment component and a second drive adjustment component that are independent of each other. The first drive adjustment component is used to adjust the pose of the Box clamp assembly 102, and the second drive adjustment component is used to adjust the pose of the Lens gripper assembly 203, thereby realizing the adjustment of the pose of the Box and the Lens when they are coupled.

[0044] For ease of description, with the jig module 100 as the center, the annular path distributed around each module illustrates the direction of horizontal movement of each module, including radial movement along the annular path (moving closer to or away from the jig module 100) and tangential direction perpendicular to the radial direction. Furthermore, the front end of the Box clamp assembly 102 is designated as the end for clamping the Box, and the front end of the Lens gripper assembly 203 is designated as the end for grasping or sucking up the Lens.

[0045] The horizontal transfer axis 600 uses a combination of two existing linear modules, which can drive the base 700 to move horizontally in the radial and tangential directions. This allows the jig module 100 and the Lens coupling module 200 to have the same reference datum, reducing the difficulty of motion control in coupling welding. Furthermore, the synchronous movement of the two modules can better adjust their relative position with the Receptacle coupling module 300, thereby improving the efficiency of coupling welding.

[0046] Specifically, the first drive adjustment assembly includes a pose adjustment assembly 101 mounted on the base 700. The output end of the pose adjustment assembly 101 is connected to the Box clamp assembly 102, and the pose adjustment assembly 101 is used to adjust the pose of the Box clamp assembly 102 relative to the base 700. The pose adjustment assembly 101 is prior art, which can drive the Box clamp assembly 102 to translate radially and tangentially, and rotate about itself in the radial, tangential, and vertical directions (Z-axis), thereby realizing the adjustment of position and posture.

[0047] The second drive adjustment assembly includes a coupling transfer shaft 201 mounted on the base 700. The output end of the coupling transfer shaft 201 is connected to a coupling angle shaft 202, and the output end of the coupling angle shaft 202 is connected to the Lens gripper assembly 203. The coupling transfer shaft 201 and the coupling angle shaft 202 work together to adjust the position and orientation of the Lens gripper assembly 203 relative to the base 700. Both the coupling transfer shaft 201 and the coupling angle shaft 202 are prior art. The former is used to drive the coupling angle shaft 202 and the Lens gripper assembly 203 to translate in the radial, tangential, and Z-axis directions to achieve position adjustment, while the latter is used to drive the Lens gripper assembly 203 to rotate around the radial, tangential, and Z-axis to achieve posture adjustment.

[0048] like Figure 1 and Figure 3 As shown, the Receptacle coupling module 300 includes a horizontal transfer module 301, a Z-axis transfer module 302, a support plate 303, and a Receptacle fixture 304. The Receptacle fixture 304 is mounted on the support plate 303, which is installed at the output end of the Z-axis transfer module 302. The Z-axis transfer module 302 is installed at the output end of the horizontal transfer module 301. The output end of the horizontal transfer module 301 can move radially along the annular distribution path, and the output end of the Z-axis transfer module 302 can move up and down along the Z-axis. Therefore, under the action of the horizontal transfer module 301 and the Z-axis transfer module 302, the support plate 303 can drive the Receptacle fixture 304 to move radially and along the Z-axis to adapt to the fixture module 100 and the Lens coupling module 200 to realize the coupling operation of the Receptacle and the Lens on the Box.

[0049] The Receptacle clamp 304 is used to hold the Receptacle with polarization-maintaining fiber and can rotate relative to the support plate 303 around its own axis to cooperate with the polarization-maintaining fiber vision module 500 to achieve automatic coupling of the product's extinction ratio. Specifically, a rotating shaft 305 is installed on the support plate 303 to drive the Receptacle clamp 304 to rotate. The rotating shaft 305 includes a motor and a synchronous belt drive assembly. The synchronous belt drive assembly connects the output end of the motor to the Receptacle clamp 304. The Receptacle clamp 304 is rotatably mounted on the support plate 303. When the motor starts, it can drive the Receptacle clamp 304 to rotate through the synchronous belt drive assembly.

[0050] In addition, an optical power meter 306 is installed on the side of the support plate 303 near the Receptacle clamp 304 so that the optical power value can be detected in real time during the coupling process.

[0051] like Figure 1 and Figure 4 As shown, the welding module 400 includes a laser welding gun 405 and a third drive adjustment component for adjusting the position and orientation of the laser welding gun 405. Multiple sets of welding modules 400 are provided, and the multiple sets of welding modules 400 are alternately distributed around the periphery of the fixture module 100 along with the Lens coupling module 200 and the Receptacle coupling module 300. For example, if three sets of welding modules 400 are provided, the three sets of welding modules 400 are distributed in a circular array along the periphery of the fixture module 100. At this time, the Lens coupling module 200 and the Receptacle coupling module 300 are respectively arranged between two adjacent welding modules 400.

[0052] Multiple welding modules 400 are set here. Through their own third drive adjustment components, the laser welding gun 405 can drive the contact position between the Receptacle and the Box to perform multi-angle and position welding to fix the Receptacle and the Box together. In order to facilitate the welding of the contact position between the Receptacle and the Box by the laser welding gun 405, the laser welding gun 405 can be tilted so that the gun head tilts downward toward the target to be welded.

[0053] The third drive adjustment assembly includes a fixedly mounted support 401, on which a sliding plate 402 movable in the radial and Z-axis directions is provided. A mounting plate 403 movable in the tangential direction is provided on the sliding plate 402, and the laser welding torch 405 is tilted and fixed on the mounting plate 403. Specifically, a transfer assembly 404 is provided between the support 401 and the sliding plate 402. The transfer assembly 404 employs existing technologies such as cylinders, slide rails, and sliders, which, when combined, enable the sliding plate 402 to move relative to the support 401 in the radial and Z-axis directions. The mounting plate 403 is tangentially slidably mounted on top of the sliding plate 402, allowing for tangential adjustment of the position of the mounting plate 403 relative to the sliding plate 402. This, in turn, enables the laser welding torch 405 to move in the radial, tangential, and Z-axis directions, improving the welding quality at the contact point between the receptacle and the box and increasing the fitting range.

[0054] like Figure 1 and Figure 5 As shown, the polarization-maintaining fiber optic vision module 500 includes an industrial camera 501 (ultra-high resolution), a magnification-adjustable eyepiece 502 (high-definition magnification), and an objective lens 503 connected sequentially from bottom to top. The industrial camera 501 is located between the Receptacle coupling module 300 and the fixture module 100, and the objective lens 503 is located on top of the magnification-adjustable eyepiece 502. The polarization-maintaining fiber optic vision module 500 includes a high-magnification ultra-high-definition microscopic vision system. Combined with the high-definition industrial camera 501 that can be connected to the software system, a high-magnification ultra-high-definition microscopic vision system is formed. By identifying the position and angle of the cat's eye in the polarization-maintaining fiber and cooperating with the Receptacle coupling module 300, the automatic coupling of the product's PER value can be realized.

[0055] In summary, the receptacle and box coupling welding device with polarization-maintaining fiber proposed in this invention mainly includes a coaxial laser welding gun 405 module (i.e., welding module 400), a lens coupling module 200, a receptacle coupling module 300, a fixture module 100, and a polarization-maintaining fiber vision module 500. The coupling welding of the fiber-supported receptacle and box is achieved through the cooperation between the functional modules.

[0056] Specifically, the welding module 400 is configured with three sets, each equipped with a third drive adjustment component and a laser welding gun 405, enabling coaxial welding of the Receptacle and the Box from multiple angles and positions; the Lens coupling module 200 includes a 4-axis coupling mechanism, a lens gripper mechanism, and a vision system to recognize the laser and lens on the Box, ultimately completing the coupling of the Lens; the Receptacle coupling module 300 includes an automatic 3-axis mechanism and an automatic Receptacle fixture, which, together with the fixture module 100, enables the coupling of the Receptacle and the Box; the fixture module 100 includes a Box fixture and an automatic 5-axis mechanism, which, together with the Receptacle coupling module 300, enables the coupling of the Receptacle and the Box.

[0057] Example 2: Based on Example 1, this aspect also proposes a method for coupling and welding a Receptacle with a polarization-maintaining fiber to a Box, including the following steps: First, power supply is used to check that the laser is normal. Then, the Lens and laser are identified and the Receptacle angle is pre-adjusted through a vision system. After moving the Lens and Receptacle to the initial coupling position, the optical power is synchronously coupled to the qualified level. The Receptacle is rotated to adjust the extinction ratio to the qualified level. Finally, multiple welding modules are used to fix the Receptacle and Box by laser welding at more than 400 angles.

[0058] Before the equipment is put into operation, manually place the Box and Receptacle on the corresponding fixtures and clamp them in place. For example, clamp the Box on the Box fixture, clamp the Receptacle on the Receptacle fixture 304, put the Lens into the Lens tray (not shown in the figure), insert the Receptacle pigtail into the optical power meter 306 and the PER measuring instrument, check the equipment and press the start button.

[0059] First, power is supplied to the optical module product, and the laser of the optical module product is judged to be normal through current feedback. When the laser of the optical module product is normal, the vision system completes the identification of the lens and laser and the pre-adjustment of the receptacle angle. Specifically, the side-view camera component 204 on the lens coupling module 200 takes pictures and identifies the laser in the lens and box in sequence. At the same time, the receptacle is moved above the polarization-maintaining fiber vision module 500 through the receptacle coupling module 300 to perform fiber optic cat-eye identification and adjust the angle of the receptacle.

[0060] Subsequently, the Lens and Receptacle are moved to the initial coupling position and the optical power is synchronously coupled to the acceptable level. The Lens is gripped by the Lens gripper assembly 203 on the Lens coupling module 200 and moved to the initial coupling position in the Box. At the same time, the Receptacle is moved to the initial coupling position by the Receptacle clamp 304 of the Receptacle coupling module 300. The Lens and Receptacle are coupled simultaneously and the optical power is coupled to the acceptable value. Then, the angle of the Receptacle is rotated to adjust its coupling extinction ratio to the acceptable value.

[0061] Finally, multiple welding modules 400 are used to fix the Receptacle and Box at multiple angles using laser welding. The multiple welding modules 400 move the laser welding gun 405 to perform multi-angle and position welding on the contact position of the Receptacle and Box, so that the Receptacle and Box are fixed together, completing the coupling welding of the optical module product.

[0062] After the optical module products are coupled and soldered, all modules are reset, and the manufactured products are removed to prepare for the next production run. This method first couples the Lens and Receptacle inside the Box simultaneously using Lens coupling module 200 and Receptacle coupling module 300, and then uses soldering module 400 to solder the Receptacle to the Box. Compared with the original production process, it has a higher coupled optical power value and lower optical loss, which can meet the mass production requirements of optical module products with transmission rates of 400G and above. This process equipment can significantly improve the overall production yield and efficiency, and reduce costs. This equipment can be widely promoted and is convenient for mass production in enterprises.

[0063] In summary, this invention proposes a coupling and welding device and method for receptacles and boxes with polarization-maintaining fibers. It is equipped with two independent coupling axis systems: one for coupling the receptacle and the other for coupling the lens. Through synchronous coupling, higher optical power products are produced, while significantly improving product yield and reducing costs and labor, helping customers achieve mass production of this type of 400G and above optical module products. Furthermore, a newly developed polarization-maintaining fiber vision system, in conjunction with the device's coupling system, achieves PER coupling between the receptacle and the box, assisting customers in developing and mass-producing new product processes.

[0064] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many improvements and modifications under the guidance of the present invention without departing from the spirit and scope of the claims. These improvements and modifications should also be considered within the scope of protection of the present invention.

[0065] In the description of this invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0066] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0067] Furthermore, the terms "first," "second," etc., 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 indicated. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

Claims

1. A method for coupling and welding a receptacle with polarization-maintaining fiber to a box, characterized in that, Includes the following steps: S1. Power the optical module product and determine whether the laser of the optical module product is normal through current feedback; S2. After the laser of the optical module product is normal, the side-view camera component on the Lens coupling module takes pictures and identifies the laser in the Lens and Box in sequence. At the same time, the Receptacle is moved above the polarization-maintaining fiber vision module through the Receptacle coupling module to perform fiber optic cat's eye recognition and adjust the angle of the Receptacle. S3. Grab the Lens using the Lens gripper component on the Lens coupling module and move it to the initial coupling position in the Box. At the same time, move the Receptacle to the initial coupling position using the Receptacle fixture on the Receptacle coupling module. S4, Lens, and Receptacle are coupled simultaneously and the optical power is coupled to the acceptable value. Then, the angle of Receptacle is rotated to couple the extinction ratio to the acceptable value. S5. Multiple sets of welding module moving laser welding guns perform multi-angle and position welding at the contact position between Receptacle and Box to fix Receptacle and Box together, completing the coupling welding of the optical module product; The welding equipment used includes a fixture module, around which a Lens coupling module, a Receptacle coupling module, and a welding module are arranged. A polarization-maintaining fiber optic vision module is arranged on the side of the fixture module closest to the Receptacle coupling module. The polarization-maintaining fiber optic vision module is used to perform fiber optic cat-eye recognition on the Receptacle. The welding module includes a laser welding gun for welding the contact position of the receptacle and the box; the fixture module includes a box clamping assembly for clamping the box; the receptacle coupling module includes a receptacle clamp for holding the receptacle; and the lens coupling module includes a lens gripper assembly for holding the lens. A side-view camera assembly for identifying the laser in the lens and the box is also provided on one side of the lens gripper assembly. First, the Lens and Receptacle inside the Box are coupled simultaneously using the Lens coupling module and the Receptacle coupling module, respectively. Then, the Receptacle is welded to the Box using the welding module.

2. The method of claim 1, wherein the method further comprises: The Box clamp assembly and the Lens gripper assembly can move synchronously in the horizontal direction, and the rear ends of the Box clamp assembly and the Lens gripper assembly are respectively provided with a first drive adjustment component and a second drive adjustment component that are independent of each other.

3. The method of claim 2, wherein the method further comprises: The fixture module and the Lens coupling module are mounted on the same base, and a horizontal transfer shaft capable of driving the base to move in the horizontal direction is provided below the base.

4. The method of claim 3, wherein the method further comprises: The first drive adjustment component includes a pose adjustment component mounted on the base. The output end of the pose adjustment component is connected to the Box clamp assembly, and the pose adjustment component is used to adjust the pose of the Box clamp assembly relative to the base.

5. The method of claim 4, wherein the method further comprises: The second drive adjustment component includes a coupling transfer axis mounted on the base, the output end of the coupling transfer axis is connected to a coupling angle axis, the output end of the coupling angle axis is connected to the Lens gripper assembly, and the coupling transfer axis and the coupling angle axis work together to adjust the position of the Lens gripper assembly relative to the base.

6. The method of claim 1, wherein the method further comprises: The Receptacle coupling module also includes a horizontal transfer module, the output end of which is connected to a Z-axis transfer module. The output end of the Z-axis transfer module is equipped with a support plate, and the Receptacle fixture passes through the support plate and can rotate around its own axis.

7. The method of claim 1, wherein the method further comprises: The bottom of the laser welding gun is provided with a third drive adjustment component for adjusting its position and posture, and the laser welding gun is tilted.

8. The method of claim 7, wherein the method further comprises: The welding module is provided in multiple sets, and the multiple sets of welding modules, Lens coupling module and Receptacle coupling module are alternately distributed around the periphery of the fixture module.

9. The method of claim 1, wherein the method further comprises: The polarization-maintaining fiber optic vision module includes an industrial camera, a magnification-adjustable eyepiece, and an objective lens connected in sequence. The industrial camera is located between the Receptacle coupling module and the fixture module, and the objective lens is located on top of the magnification-adjustable eyepiece.

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