Pluggable optical fiber FA-CPO interface packaging structure and method

Abstract

The invention provides a pluggable optical fiber FA-CPO interface packaging structure and method. The packaging structure comprises a base, an optical fiber array, PINs and a collimating lens. The base is made of a glass material, and a first positioning groove is formed in the top surface of the base; the optical fiber array comprises a pressing block and a plurality of optical fibers, the pressing block is provided with a mounting groove and a second positioning groove, and the plurality of optical fibers are assembled in the mounting groove and bonded through an adhesive; the PIN needle is fixedly installed on the base and is in butt joint with the pressing block. Or the PINs are fixedly mounted on the pressing blocks and are connected with the base in a pluggable manner; the collimating lens is mounted on the base and coupled with the plurality of optical fibers. Through the first positioning groove and the second positioning groove, one of the first positioning groove and the second positioning groove is fixedly connected with the PIN, and the other of the first positioning groove and the second positioning groove is connected with the PIN in a pluggable mode, so that coupling of the optical fiber and the collimating lens is achieved, the problem that an insertion hole enough for containing the PIN in length cannot be directly machined in the glass base is solved, and meanwhile the position precision of the PIN can be guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of communication technology, in particular to a pluggable fiber FA-CPO interface packaging structure and method. BACKGROUND

[0002] In the field of optical communication, the traditional connection method is called pluggable. The optical engine is a pluggable optical module. After the optical fiber comes, it is inserted into the optical module, and then sent to the network switching chip through the SerDes (SERializer (serializer) / DESerializer (deserializer) channel. CPO, the full name of English Co-Packaged Optics, is a co-packaged optical / electro-optical co-packaged, which is to assemble the network switching chip and the optical engine together in the same Socketed (socket), forming a co-packaged chip and module. MPO, the full name of English Multi-fiber Push On, is a multi-fiber push-on connector composed of multiple optical fibers.

[0003] The traditional MPO / CPO interface uses a plastic base or a glass base. When combined, the PIN pin needs to be connected with the FA (the full name of English Fiber Array). However, the plastic base is not resistant to high temperature, which causes the position precision between the insertion holes of the plastic base carrying the PIN pin to change when heated. When the fiber array FA and the PIN pin are configured on the glass base, the glass is resistant to high temperature but is brittle, and cannot directly process insertion holes that can accommodate the length of the PIN pin. SUMMARY

[0004] Therefore, the present application provides a pluggable fiber FA-CPO interface packaging structure and method to solve the technical problems that the plastic base is not resistant to high temperature, which causes the position precision between the insertion holes of the plastic base carrying the PIN pin to change when heated; and the glass base is resistant to high temperature but is brittle, and cannot directly process insertion holes that can accommodate the length of the PIN pin.

[0005] The technical scheme of the present application is as follows: In a first aspect, the present application provides a pluggable fiber FA-CPO interface packaging structure, comprising a base, a fiber array, a PIN pin and a collimating lens, wherein: The base is made of glass material, and a first positioning groove is arranged on the top surface of the base; The fiber array comprises a pressing block and a plurality of optical fibers, the pressing block is provided with a mounting groove and a second positioning groove, and the plurality of optical fibers are assembled in the mounting groove and are bonded by an adhesive; The PIN pin is fixedly installed on the base and is in butt joint with the pressing block; or the PIN pin is fixedly installed on the pressing block and is in pluggable connection with the base; The first positioning slot and the second positioning slot, one of which is used for fixed connection with the PIN needle, and the other is used for pluggable connection with the PIN needle; The collimating lens is mounted on the base and coupled with the plurality of optical fibers.

[0006] On the basis of the above technical scheme, preferably, the PIN needle is fixedly installed in the first positioning slot of the base, the PIN needle is inserted into the second positioning slot, and the pressing block is coveringly installed on the base so that the inner wall of the second positioning slot abuts and presses the PIN needle.

[0007] On the basis of the above technical scheme, preferably, a cover plate is further included, the cover plate is provided with a third positioning slot, the cover plate is coveringly installed on the base, the third positioning slot is oppositely arranged with the first positioning slot to form a clamping hole for clamping and fixing the PIN needle, and the PIN needle is used for pluggable connection with the clamping hole. The optical fiber array further includes a base, the base is provided with a fourth positioning slot, the PIN needle is fixedly installed in the fourth positioning slot of the base, the pressing block is connected with the base, and the second positioning slot is oppositely arranged with the fourth positioning slot so that the inner wall of the second positioning slot abuts and presses the PIN needle.

[0008] On the basis of the above technical scheme, preferably, the diameter accuracy of the PIN needle is within ±0.1 um, the position accuracy of the PIN needle is within ±3 um, and the position accuracy of the optical fiber needs to be within ±0.5 um.

[0009] On the basis of the above technical scheme, preferably, the coupling of the collimating lens and the optical fiber needs to satisfy that the offset amount of the light beam center position in the X direction and the offset amount in the Y direction are both within ±5 um.

[0010] On the basis of the above technical scheme, preferably, the cross sections of the first positioning slot, the third positioning slot, the fourth positioning slot and the second positioning slot are V-shaped or semicircular.

[0011] On the basis of the above technical scheme, preferably, the cross section of the mounting slot is V-shaped or semicircular.

[0012] On the basis of the above technical scheme, preferably, a converging lens is further included, the converging lens is mounted on the base and coupled with the plurality of optical fibers, and the converging lens is located on the side of the collimating lens away from the base.

[0013] On the basis of the above technical scheme, preferably, an adhesive part is arranged at the end of the top surface of the base away from the cover plate, and the adhesive part is used for bonding a PIC chip.

[0014] In a second aspect, the application provides a pluggable optical fiber FA-CPO interface packaging method using the pluggable optical fiber FA-CPO interface packaging structure as described in the first aspect, comprising: mounting the collimating lens on the base; assembling the plurality of optical fibers in the mounting groove and bonding by adhesive; fixedly mounting the PIN pin in one of the first positioning groove and the second positioning groove; inserting the PIN pin into the other of the first positioning groove and the second positioning groove to enable the collimating lens to be coupled with the optical fiber.

[0015] The pluggable optical fiber FA-CPO interface packaging structure and method of the application have the following beneficial effects over the prior art: (1) The base is made of glass, the top surface of the base is provided with a first positioning groove, the pressing block is provided with a mounting groove and a second positioning groove, the plurality of optical fibers are assembled in the mounting groove and bonded by adhesive, one of the first positioning groove and the second positioning groove is used for fixed connection with the PIN pin, and the other is used for pluggable connection with the PIN pin, thereby enabling the optical fiber to be coupled with the collimating lens on the base, solving the problem that the length of the PIN pin cannot be directly accommodated in the hole on the glass base, and ensuring the positional accuracy of the PIN pin; (2) The PIN pin is fixedly mounted in the first positioning groove of the base, the PIN pin is inserted into the second positioning groove, and the pressing block is covered and mounted on the base, so that the inner wall of the second positioning groove presses and tightens the PIN pin, enabling the base to be positioned and connected with the optical fiber array, thereby enabling the optical fiber to be coupled with the collimating lens on the base; (3) The PIN pin is fixedly mounted in the fourth positioning groove of the base, the pressing block is connected with the base, the inner wall of the second positioning groove contacts and tightens the PIN pin, enabling the PIN pin to be fixed; the cover plate is fixedly connected with the base, forming the clamping hole, the PIN pin is inserted into the clamping hole, enabling the base to be positioned and connected with the optical fiber array, thereby enabling the optical fiber to be coupled with the collimating lens on the base; (4) The diameter accuracy of the PIN pin is within ±0.1 um, the positional accuracy of the PIN pin is within ±3 um, and the positional accuracy of the optical fiber needs to be within ±0.5 um, thereby ensuring that the coupling of the collimating lens and the optical fiber meets the accuracy requirement after the PIN pin is connected with the base and the optical fiber array; (5) The cross-sections of the first positioning groove, the second positioning groove, the third positioning groove, and the fourth positioning groove are V-shaped or semicircular, which facilitates the tightening of the PIN pin and facilitates the grooving on the glass base, thereby improving the processing convenience of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 A three-dimensional diagram of a pluggable optical fiber FA-CPO interface packaging structure according to an embodiment of the present invention; Figure 2 An exploded view of a pluggable optical fiber FA-CPO interface packaging structure according to an embodiment of the present invention; Figure 3 For the present invention Figure 1 Schematic diagram of the structure of the base; Figure 4 For the present invention Figure 1 Schematic diagram of the structure of the optical fiber array in FIG; Figure 5 A three-dimensional diagram of another pluggable optical fiber FA-CPO interface packaging structure in an embodiment of the present invention; Figure 6 An exploded view of another pluggable optical fiber FA-CPO interface packaging structure in an embodiment of the present invention; Figure 7 A schematic diagram of another installation method of a pluggable optical fiber FA-CPO interface packaging structure in an embodiment of the present invention; Figure 8 For the present invention Figure 5 A perspective view of the base in Figure 9 For the present invention Figure 5 A perspective view of the cover plate in FIG. Figure 10 For the present invention Figure 5 A schematic diagram of the structure of the base; Figure 11 For the present invention Figure 5 Schematic diagram of the structure of the briquette; Figure 12 For the present invention Figure 11 A partial enlarged view of part A in the middle; Figure 13A flowchart of a pluggable optical fiber FA-CPO interface packaging method in the embodiment of the present application is shown.

[0018] Marked with reference numerals: 1 - base, 2 - cover plate, 3 - optical fiber array, 4 - PIN needle, 5 - collimating lens, 6 - converging lens; 100 - clamping hole; 11 - first positioning groove, 12 - bonding part; 21 - third positioning groove; 31 - pressing block, 311 - mounting groove, 312 - second positioning groove, 32 - optical fiber, 33 - base, 331 - fourth positioning groove. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be clearly and completely described in combination with the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0020] Reference Figures 1-12 As shown in the drawings, the first aspect embodiment of the present application proposes a pluggable optical fiber FA-CPO interface packaging structure, which comprises a base 1, an optical fiber array 3, a PIN needle 4 and a collimating lens 5, wherein: The base 1 is made of glass material, and a first positioning groove 11 is arranged on the top surface of the base 1. The first positioning groove 11 can be a V-shaped groove, which facilitates grooving on the glass material base 1 and improves the processing convenience of the device; A third positioning groove 21 is arranged on the cover plate 2, which can be a V-shaped groove. The cover plate 2 is mounted on the base 1, and the third positioning groove 21 is arranged opposite to the first positioning groove 11 to form a clamping hole 100 for clamping and fixing the PIN needle 4. The cover plate 2 is inverted U-shaped and can accommodate the collimating lens 5 inside; The optical fiber array 3 comprises a pressing block 31 and a plurality of optical fibers 32. The pressing block 31 is provided with a mounting groove 311 and a second positioning groove 312, and the second positioning groove 312 can be a V-shaped groove. The pressing block 31 is connected to the base 33 in a covering manner, and the plurality of optical fibers 32 are assembled in the mounting groove 311 and are bonded by an adhesive. The mounting groove 311 can be a V-shaped groove; The PIN needle 4 is fixedly installed on the base 1 and is in butt joint with the pressing block 31; or the PIN needle 4 is fixedly installed on the pressing block 31 and is in pluggable connection with the base 1; One of the first positioning groove 11 and the second positioning groove 312 is used for fixed connection with the PIN pin 4, and the other is used for pluggable connection with the PIN pin 4, the PIN pin 4 is in a cylindrical shape, there are two PIN pins 4, the two PIN pins 4 are arranged in parallel, and both of the two PIN pins 4 are used for fixed connection at one end and used for pluggable connection at the other end; The collimating lens 5 is installed on the base 1 and is coupled with the plurality of optical fibers 32.

[0021] The pluggable optical fiber FA-CPO interface packaging structure provided in the embodiment is characterized in that the base 1 is made of glass, the first positioning groove 11 is arranged on the top surface of the base 1, the mounting groove 311 and the second positioning groove 312 are arranged on the pressing block 31, the plurality of optical fibers 32 are assembled in the mounting groove 311 and are bonded by an adhesive, one of the first positioning groove 11 and the second positioning groove 312 is used for fixed connection with the PIN pin 4, and the other is used for pluggable connection with the PIN pin 4, the coupling between the optical fiber 32 and the collimating lens 5 on the base 1 is realized, and the problem that a hole with a length sufficient to accommodate the PIN pin 4 cannot be directly machined on the glass base 1 is solved, and the position accuracy of the PIN pin 4 can be ensured.

[0022] In some embodiments, in combination with Figures 1-4 As shown, the PIN pin 4 is fixedly installed in the first positioning groove 11 of the base 1, the first positioning groove 11 bears the PIN pin 4, the PIN pin 4 is inserted into the second positioning groove 312, and the pressing block 31 is covered and installed on the base 1, so that the inner wall of the second positioning groove 312 abuts and presses the PIN pin 4. After the PIN pin 4 is assembled in the base 1 to form an assembly one, the assembly one is connected with the assembled optical fiber array 3, the bottom surface of the pressing block 31 is attached to the top surface of the base 1, the PIN pin 4 is inserted into the second positioning groove 312, and after being inserted to a specified depth, the positioning and connection between the base 1 and the optical fiber array 3 are realized, so that the coupling between the optical fiber 32 and the collimating lens 5 on the base 1 is realized.

[0023] In some other embodiments, in combination with Figures 5-12As shown, the pluggable optical fiber FA-CPO interface package structure further comprises a cover plate 2, the cover plate 2 is provided with a third positioning groove 21, the third positioning groove 21 can be a V-shaped groove, the cover plate 2 is covered and mounted on the base 1, and the third positioning groove 21 is arranged opposite to the first positioning groove 11 to form a clamping hole 100 for clamping and fixing the PIN needle; the cover plate 2 is inverted U-shaped, and the inside can accommodate the collimating lens 5; the PIN needle 4 is used for pluggable connection with the clamping hole 100; the optical fiber array 3 further comprises a base 33, the base 33 is provided with a fourth positioning groove 331, the fourth positioning groove 331 can be a V-shaped groove, the PIN needle 4 is fixedly installed in the fourth positioning groove 331 of the base 33, the fourth positioning groove 331 bears the PIN needle 4, the pressing block 31 is connected with the base 33, the inner wall of the second positioning groove 312 contacts and compresses the PIN needle 4, the PIN needle 4 is fixed by an adhesive, and the PIN needle 4 extends out of the fourth positioning groove 331 by a distance; the cover plate 2 is fixedly connected with the base 1 to form the clamping hole 100, and the PIN needle 4 is inserted into the clamping hole 100. After the PIN needle 4 is assembled in the base 33 and the pressing block 31 to form the optical fiber array 3, the assembly two formed by the fixed connection of the cover plate 2 and the base 1 is butted against the assembled optical fiber array 3, the PIN needle 4 is inserted into the clamping hole 100, the positioning and connection of the base 1 and the optical fiber array 3 are realized, and thus the coupling of the collimating lens 5 on the base 1 and the optical fiber 32 is realized.

[0024] In some embodiments, the diameter accuracy of the PIN needle 4 is within ±0.1 um, the position accuracy of the PIN needle 4 is within ±3 um, and the position accuracy of the optical fiber 32 needs to be within ±0.5 um. Through the accuracy setting of the PIN needle 4 and the optical fiber 32, it can be ensured that the coupling of the collimating lens 5 and the optical fiber 32 after the PIN needle 4 connects the base 1 and the optical fiber array 3 meets the accuracy requirement. The insertion loss of the PIN needle 4 is not more than 0.25 dB. The pitch tolerance of the optical fiber array 3 and the PIN needle 4 is ≤±3 um.

[0025] In some embodiments, the end face angle tolerance of the end face of the base 33 and the end face of the end of the base 1 is ≤±0.5°. Through the above setting, it is ensured that after the end face of the base 33 is in contact with the base 1, the butt joint of the PIN needle 4 will not cause angle error, and the coupling accuracy of the collimating lens 5 and the optical fiber 32 is improved.

[0026] In some embodiments, the mounting groove 311 is cut by a high-precision dicing machine in a V-shaped groove, and the mounting groove 311 needs to meet the following requirements: X-axis adjacent tolerance ≤ ± 0.5 um, X-axis cumulative tolerance ≤ ± 1 um, length-width-height tolerance ≤ ± 0.05 um. The X-axis adjacent tolerance refers to the tolerance band relationship of adjacent dimensions (or features) on the same shaft part. The X-axis cumulative tolerance refers to the cumulative error of each measurement value or calculation result in the X-axis direction.

[0027] In some embodiments, the coupling of the collimating lens 5 and the optical fiber 32 needs to meet the requirements that the offset amount of the beam center position in the X direction and the offset amount in the Y direction are both within the range of ± 5 um. By setting the above offset amount, the coupling accuracy of the collimating lens 5 and the optical fiber 32 is improved, and the collimating effect of the collimating lens 5 on the optical fiber 32 is better, thereby improving the accuracy and reliability of data transmission of the optical fiber 32.

[0028] In some embodiments, the cross section of the first positioning groove 11, the third positioning groove 21, the fourth positioning groove 331, and the second positioning groove 312 can also be a semicircle or a small semicircle of a poor arc, and the diameter is the same as or slightly larger than the diameter of the PIN pin 4. When the cross section is a semicircle, the clamping hole 100 is a complete circular hole; when the cross section is a small semicircle of a poor arc, the clamping hole 100 formed by the first positioning groove 11 and the third positioning groove 21 is an incomplete circular hole.

[0029] In some embodiments, the cross section of the mounting groove 311 can also be a semicircle, and the diameter of the mounting groove 311 is the same as the diameter of the optical fiber 32, which is convenient for supporting the optical fiber 32. In actual design, the diameter of the mounting groove 311 can be slightly larger than the diameter of the optical fiber 32, which is convenient for fixing the optical fiber 32 with adhesive.

[0030] In some embodiments, the pluggable optical fiber FA-CPO interface package structure further comprises a converging lens 6, which is installed on the base 1 and coupled with the plurality of optical fibers 32. The converging lens 6 is located on the side of the collimating lens 5 away from the base 33. After the PIN pin 4 is positioned and connected to the base 1 and the optical fiber array 3, the optical fiber 32 can be coupled with the converging lens 6 by installing the converging lens 6 on the base 1. The function of the converging lens 6 is that when light passes through the converging lens, the refractive index of the lens material is different from the surrounding environment, and the light will be refracted, so that the originally dispersed light can be concentrated.

[0031] In some embodiments, the top surface of the base 1 is provided with an adhesive part 12 at one end away from the cover plate 2, which is used for bonding a PIC chip. PIC is the abbreviation of Photonic Integrated Circuit, which is a microchip containing two or more photonic elements forming a functional circuit. PIC chip uses photons (or particles of light) instead of electrons to transmit information. Since photons move at the speed of light, they have a wide bandwidth and minimal energy loss, so PIC chips can transmit data quickly and are highly energy-efficient. It can be used to create faster, more energy-efficient devices and can sense with the highest precision, making it very effective in processing and transmitting data.

[0032] Based on the same concept, referring to Figure 13 The second aspect of the present application is a pluggable fiber FA-CPO interface packaging method using the pluggable fiber FA-CPO interface packaging structure as described in the first aspect, which comprises the following steps: Step S101: mounting the collimating lens 5 on the base 1; After the collimating lens 5 is pre-coupled with the optical fiber 32, it is fixed by adhesive at the corresponding position of the base 1; Step S102: assembling a plurality of optical fibers 32 in the mounting groove 311 and bonding them by adhesive; Step S103: fixing and mounting the PIN pin 4 in one of the first positioning groove 11 and the second positioning groove 312; Step S104: inserting the PIN pin 4 into the other one of the first positioning groove 11 and the second positioning groove 312, so that the collimating lens 5 is coupled with the optical fiber 32.

[0033] In some embodiments, in step S103, the PIN pin 4 is fixedly mounted in one of the first positioning groove 11 and the second positioning groove 312, specifically comprising: placing the PIN pin 4 in the first positioning groove 11 of the base 1, fixing the PIN pin 4 by adhesive, inserting the PIN pin 4 into the second positioning groove 312, and covering the mounting block 31 on the base 1, so that the inner wall of the second positioning groove 312 abuts and compresses the PIN pin 4.

[0034] In some other embodiments, in step S103, the PIN needle 4 is fixedly installed in one of the first positioning groove 11 and the second positioning groove 312, specifically including: placing the PIN needle 4 in the fourth positioning groove 331, the pressing block 31 being connected with the base 33, the inner wall of the second positioning groove 312 being in contact with the PIN needle 4 to press the PIN needle 4, the PIN needle 4 being fixed by adhesive, and the PIN needle 4 extending out of the fourth positioning groove 331 by a distance; and the PIN needle 4 being inserted into the clamping hole 100.

[0035] The above merely describes the preferred embodiments of the present application and is not used to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. Pluggable optical fiber FA-CPO interface packaging structure, characterized in that: It includes a base, an optical fiber array, a PIN needle and a collimating lens, wherein: The base is made of glass, and a first positioning groove is provided on the top surface of the base; The optical fiber array includes a pressing block and a plurality of optical fibers, wherein the pressing block is provided with a mounting groove and a second positioning groove, and the plurality of optical fibers are assembled in the mounting grooves and bonded by an adhesive; The PIN pin is fixedly mounted on the base and docked with the pressing block; or the PIN pin is fixedly mounted on the pressing block and is pluggable with the base; One of the first positioning groove and the second positioning groove is used to be fixedly connected to the PIN pin, and the other is pluggably connected to the PIN pin; The collimating lens is mounted on the base and coupled with the plurality of optical fibers.

2. The pluggable optical fiber FA-CPO interface packaging structure according to claim 1, characterized in that: The PIN needle is fixedly installed in the first positioning groove of the base, and the PIN needle is inserted into the second positioning groove. The pressing block is covered and installed on the base so that the inner wall of the second positioning groove contacts and presses the PIN needle.

3. The pluggable optical fiber FA-CPO interface packaging structure according to claim 1, characterized in that: The cover is further provided with a third positioning groove, the cover is mounted on the base, the third positioning groove is arranged opposite to the first positioning groove to form a clamping hole for clamping and fixing the PIN needle, and the PIN needle is used to be pluggable and connected to the clamping hole; The optical fiber array also includes a base, which is provided with a fourth positioning groove. The PIN needle is fixedly installed in the fourth positioning groove of the base. The pressure block is connected to the base. The second positioning groove is arranged opposite to the fourth positioning groove so that the inner wall of the second positioning groove contacts and presses the PIN needle.

4. The pluggable optical fiber FA-CPO interface packaging structure according to claim 1, characterized in that: The diameter accuracy of the PIN needle is within the range of ±0.1um, the position accuracy of the PIN needle is within the range of ±3um, and the position accuracy of the optical fiber must be within the range of ±0.5um.

5. The pluggable optical fiber FA-CPO interface packaging structure according to claim 1, characterized in that: The coupling between the collimating lens and the optical fiber must satisfy the requirement that the offset of the center position of the light beam in the X direction and the offset in the Y direction are both within the range of ±5 μm.

6. The pluggable optical fiber FA-CPO interface packaging structure according to claim 3, characterized in that: The cross sections of the first positioning groove, the third positioning groove, the fourth positioning groove and the second positioning groove are V-shaped or semicircular.

7. The pluggable optical fiber FA-CPO interface packaging structure according to claim 1, characterized in that: The cross section of the installation groove is V-shaped or semicircular.

8. The pluggable optical fiber FA-CPO interface packaging structure according to claim 3, characterized in that: The invention also includes a converging lens, which is installed on the base and coupled with the multiple optical fibers. The converging lens is located on a side of the collimating lens away from the base.

9. The pluggable optical fiber FA-CPO interface packaging structure according to claim 3, characterized in that: An adhesive portion is provided at one end of the top surface of the base away from the cover plate, and the adhesive portion is used for adhering the PIC chip.

10. A pluggable optical fiber FA-CPO interface packaging method, using the pluggable optical fiber FA-CPO interface packaging structure according to any one of claims 1 to 9, characterized in that: include: Install the collimating lens on the base; Installing the plurality of optical fibers in the installation grooves and bonding them with adhesive; Fixing the PIN pin in one of the first positioning groove and the second positioning groove; Insert a PIN needle into the other of the first positioning groove and the second positioning groove to couple the collimating lens with the optical fiber.

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