Polarization maintaining optical fiber array assembling equipment and polarization maintaining optical fiber array assembling method

Abstract

The invention discloses polarization maintaining optical fiber array assembling equipment and a polarization maintaining optical fiber array assembling method.The polarization maintaining optical fiber array assembling equipment comprises a connector support, a fiber arrangement jig, a detection component and an alignment tool, and the alignment tool comprises a rotating base, a plurality of rotating rods and a fixing plate; the polarization maintaining optical fiber array assembling method comprises the following steps: assembling the polarization maintaining optical fiber array assembling equipment; the substrate is placed on a fiber arrangement jig, and the rear end of the polarization maintaining fiber is placed in a V-shaped groove in the substrate; a product connector is placed on a connector support; respectively placing each polarization maintaining optical fiber in the positioning groove of each rotating rod, and respectively fixing the polarization maintaining optical fibers with the corresponding rotating rods; sequentially rotating each rotating rod according to real-time monitoring information of the detection part until the polarization-maintaining angle of each polarization-maintaining optical fiber is adjusted to a standard value; and fixing the substrate and the polarization maintaining optical fiber. According to the invention, accurate alignment and assembly of the polarization maintaining optical fiber array can be realized, and the yield of the obtained product is high.

Description

Technical Field

[0001] The present invention relates to the technical field of polarization-maintaining optical fiber product production, in particular to a polarization-maintaining optical fiber array assembly device and a polarization-maintaining optical fiber array assembly method. Background Art

[0002] A polarization-maintaining optical fiber is a special optical fiber. Compared with ordinary optical fibers, the polarization-maintaining optical fiber can effectively prevent the polarization state of an optical signal from changing, and has wide applications in the fields of optical communication, lasers, optical sensing, etc. A polarization-maintaining optical fiber array (Fiber Array, FA) is a key component in optical communication. It uses a substrate with V-grooves (i.e., V-grooves, V-Grooves) to install a bundle of polarization-maintaining optical fibers on the substrate at a specified interval and form an array.

[0003] The existing assembly method is to place the polarization-maintaining optical fiber into the V-groove of the substrate, manually hold a single polarization-maintaining optical fiber and rotate it, detect the alignment through a Charge Coupled Device (CCD), and sequentially complete the rotational alignment of each optical fiber. After adjusting the polarization-maintaining angle of each optical fiber to the standard value, the substrate and the optical fiber are fixed with glue. However, in the actual operation process, due to the small diameter of the optical fiber, the adjustment of the polarization-maintaining angle is difficult, and it is easy to cause product scrapping. Summary of the Invention

[0004] The present invention aims to at least solve one of the technical problems existing in the prior art. For this purpose, the present invention provides a polarization-maintaining optical fiber array assembly device and a polarization-maintaining optical fiber array assembly method.

[0005] The solution of the present invention to solve its technical problems is as follows: In a first aspect, a polarization-maintaining optical fiber array assembly device is provided, including a connector bracket, a fiber arranging fixture, a detection component, and an alignment tooling. The connector bracket and the fiber arranging fixture are respectively arranged on the front and rear sides of the alignment tooling, and the detection component is arranged on the rear side of the fiber arranging fixture and faces the fiber arranging fixture; the alignment tooling includes a rotating seat, a plurality of rotating rods, and a fixing plate. The rotating seat is provided with a plurality of upward-opening rotating grooves, the rotating rods are respectively arranged in the rotating grooves and rotatably connected to the groove walls of the rotating grooves. The rotating grooves penetrate through the front and rear ends of the rotating seat. The rotating rods extend in the front-rear direction and extend out of the front and rear ends of the rotating grooves. The rotating rods are provided with positioning grooves, and the positioning grooves penetrate through the front and rear ends of the rotating rods. The fixing plate is movably connected to the rotating seat to open or close the rotating grooves.

[0006] The present invention has at least the following beneficial effects: When in use, place the product connector of the polarization maintaining fiber array product on the connector bracket, place the polarization maintaining fiber in the positioning groove, place the substrate at the fiber arranging fixture, and arrange the rear ends of the polarization maintaining fibers in the V-grooves on the substrate in sequence. The polarization maintaining fiber can rotate in the V-groove. The operator can rotate the rotating rod by means of hand-held control to realize the rotation of the polarization maintaining fiber. Cooperate with the use of the detection component to monitor the polarization maintaining angle of the polarization maintaining fiber. When the angle is adjusted to the required value, it is determined that the polarization maintaining fiber rotates in place. Since the diameter of the rotating rod is larger than that of the polarization maintaining fiber, it is beneficial for the operator to hold and rotate, which can greatly reduce the difficulty of rotating the polarization maintaining fiber. Moreover, since the rotating rod provides protection for the polarization maintaining fiber, the situation of damage to the polarization maintaining fiber can be avoided, and the yield of the product can be improved.

[0007] In a second aspect, a method for assembling a polarization maintaining fiber array is proposed. Use the polarization maintaining fiber array assembling device as described in the above technical solution to assemble a polarization maintaining fiber array product. The polarization maintaining fiber array product includes a product connector, a substrate, and a polarization maintaining fiber. The front end of the polarization maintaining fiber is connected to the product connector. Multiple V-grooves are provided on the substrate. The method for assembling the polarization maintaining fiber array includes the following steps: Assemble the polarization maintaining fiber array assembling device; Place the substrate on the fiber arranging fixture and place the rear end of the polarization maintaining fiber in the V-groove on the substrate; Place the product connector on the connector bracket; Place each polarization maintaining fiber in the positioning groove of each rotating rod respectively, and fix each polarization maintaining fiber to the corresponding rotating rod respectively; Rotate each rotating rod in sequence according to the real-time monitoring information of the detection component until the polarization maintaining angle of each polarization maintaining fiber is adjusted to the standard value; Fix the substrate and the polarization maintaining fiber.

[0008] Using the polarization maintaining fiber array assembling device and assembling the polarization maintaining fiber array through the above steps can avoid the situation of damage to the polarization maintaining fiber and improve the yield of the product.

[0009] As a further improvement of the above technical solution, the step of assembling the polarization maintaining fiber array assembling device includes: Prepare an installation platform, a connector bracket, a fiber arranging fixture, a detection component, and an alignment tooling; Install the connector bracket, the alignment tooling, the fiber arranging fixture, and the detection component on the installation platform in sequence from front to back; Fine-tune the position of the rotating seat to make the central axes of the rotating seat and the fiber arranging fixture coincide.

[0010] As a further improvement of the above technical solution, the fiber arranging fixture includes a placing table, a cover plate and a pressing member; the step of placing the substrate on the fiber arranging fixture and placing the rear end of the polarization maintaining optical fiber in the V-groove on the substrate includes: Place the substrate on the placing table, so that the V-groove of the substrate extends in the front-rear direction and opens upward; Place the rear ends of the polarization maintaining optical fibers in the V-grooves respectively; Place the cover plate on the substrate and cover the V-groove; Apply pressure to the cover plate with the pressing member and ensure that the polarization maintaining optical fiber can rotate in the V-groove.

[0011] As a further improvement of the above technical solution, the step of respectively placing each polarization maintaining optical fiber in the positioning groove of each rotating rod and respectively fixing the polarization maintaining optical fiber to the corresponding rotating rod includes: Open the fixing plate to expose the rotating groove; Place the polarization maintaining optical fiber in the positioning groove; Fix the front and rear ends of the polarization maintaining optical fiber to the rotating rod; After each polarization maintaining optical fiber is respectively fixed to the rotating rod, cover the fixing plate.

[0012] As a further improvement of the above technical solution, each rotating rod respectively includes a rod body and two fixing blocks, the two fixing blocks are respectively arranged at the front and rear ends of the rod body, and the rotating groove is arranged on the rod body; the step of fixing the polarization maintaining optical fiber to the front and rear ends of the rotating rod is: fixing the polarization maintaining optical fiber to the two fixing blocks respectively with paraffin.

[0013] As a further improvement of the above technical solution, the alignment tooling further includes a locking bolt, the locking bolt penetrates through the fixing plate in the up-down direction and is threadedly connected to the fixing plate; the step of sequentially rotating each rotating rod according to the real-time monitoring information of the detection component until the polarization maintaining angle of each polarization maintaining optical fiber is adjusted to the standard value includes: Grip a single rotating rod and rotate the rotating rod according to the real-time monitoring information; After the polarization maintaining optical fiber corresponding to the rotating rod is adjusted in place, rotate the locking bolt so that the lower end surface of the locking bolt abuts against the side wall of the rotating rod; Fix the polarization maintaining optical fiber to the fiber arranging fixture with paraffin; Repeat the above steps to adjust and fix each polarization maintaining optical fiber in sequence.

[0014] As a further improvement of the above technical solution, the alignment tooling is provided with two layers of rotating seats and two layers of fixing plates. The rotating seats and the fixing plates are arranged in one-to-one correspondence. The rotating seat located in the upper layer is connected to the fixing plate located in the lower layer. The rotating rods are respectively arranged in the rotating grooves of each layer of the rotating seats. In the step of respectively placing each polarization-maintaining optical fiber into the positioning grooves of each rotating rod and respectively fixing the polarization-maintaining optical fiber to the corresponding rotating rod, first place the polarization-maintaining optical fiber into the positioning groove of the rotating rod located in the lower layer. After the positioning grooves of the rotating rods in the lower layer are filled with the polarization-maintaining optical fibers, then put the remaining polarization-maintaining optical fibers into the positioning grooves located in the upper layer.

[0015] As a further improvement of the above technical solution, after completing the step of fixing the substrate and the polarization-maintaining optical fiber, remove the polarization-maintaining optical fiber from the alignment tooling in the order of first the upper layer and then the lower layer.

[0016] As a further improvement of the above technical solution, the step of fixing the substrate and the polarization-maintaining optical fiber is: bonding the substrate and the polarization-maintaining optical fiber with glue. Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly describe the drawings required for the description of the embodiments. Obviously, the described drawings are only a part of the embodiments of the present invention, rather than all the embodiments. Without creative efforts, those skilled in the art can also obtain other design solutions and drawings based on these drawings.

[0018] Figure 1 is the flowchart of the method for assembling a polarization-maintaining optical fiber array according to an embodiment of the present invention; Figure 2 is Figure 1 the detailed flowchart of step S100 in Figure 3 is Figure 1 the detailed flowchart of step S200 in Figure 4 is Figure 1 the detailed flowchart of step S400 in Figure 5 is Figure 1 the detailed flowchart of step S500 in Figure 6 is the overall structural schematic diagram of the polarization-maintaining optical fiber array assembling device according to an embodiment of the present invention; Figure 7 is the overall structural schematic diagram of the alignment tooling according to an embodiment of the present invention; Figure 8 is the structural schematic diagram of the alignment structure according to an embodiment of the present invention; Figure 9 is a schematic structural view of the adjustment structure according to an embodiment of the present invention; Figure 10 is a schematic structural view of the rotating rod according to an embodiment of the present invention; Figure 11 is a schematic structural view of the rotating seat according to an embodiment of the present invention; Figure 12 is a schematic structural view of the fiber arranging jig according to an embodiment of the present invention.

[0019] Reference numerals: 101, product joint; 102, substrate; 103, glue; 201, joint bracket; 301, alignment tooling; 302, rotating rod; 3021, rod body; 3022, positioning groove; 3023, fixing block; 3024, hand-held block; 3025, limiting block; 303, rotating seat; 3031, rotating groove; 3032, limiting groove; 3033, locking member; 304, fixing plate; 305, locking bolt; 306, first adjustment structure; 3061, first slider; 3062, first adjustment block; 3063, first adjustment bolt; 3064, first sliding groove; 3065, first locking groove; 307, second adjustment structure; 3071, second slider; 3072, second adjustment block; 3073, second adjustment bolt; 3074, second locking groove; 308, third adjustment structure; 3081, base; 3082, third adjustment bolt; 401, fiber arranging jig; 402, placing table; 4021, front and rear driving member; 4022, left and right driving member; 403, cover plate; 404, pressing needle; 405, tension spring; 406, pressing needle bracket; 4061, pressing needle rotating shaft; 407, control screw; 408, clamping jaw; 409, slide rail; 4091, slide rail driving member; 501, detection component; 601, installation platform. Detailed implementation manners

[0020] [[ID=3***]]The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described by referring to the drawings are exemplary only for explaining the present invention and should not be construed as a limitation to the present invention.

[0021] In the description of the present invention, the orientation descriptions, such as the upper, lower, front, rear, left, right, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention 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 invention.

[0022] In the description of the present invention, "several" means one or more, "multiple" means more than two, and understandings such as "greater than", "less than", "exceeding", etc. do not include the present number, and understandings such as "above", "below", "within", etc. include the present number. If there is a description of "first" and "second", it is only for the purpose of distinguishing technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0023] In the description of the present invention, unless otherwise clearly defined, words such as "set", "installed", "connected", etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

[0024] Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without creative efforts all fall within the scope of protection of the present invention. Each technical feature in the present invention can be combined interactively on the premise of not conflicting with each other.

[0025] Theoretically speaking, optical fibers do not produce birefringence, and moreover, the polarization state of optical fibers does not change during the propagation process. However, in practice, during the production process of ordinary optical fibers, due to external force effects and other reasons, the optical fiber may be uneven in thickness or bent, etc., which will cause the birefringence phenomenon. When the optical fiber is affected by any external disturbances, such as factors like wavelength, curvature, temperature, etc., the polarization state of light will become chaotic when transmitted in ordinary optical fibers. The application of polarization-maintaining optical fibers can solve this problem of polarization state change. By designing the geometric dimensions of the optical fiber, stronger birefringence is generated to eliminate the influence of stress on the polarization state of the incident light.

[0026] Common polarization-maintaining optical fibers are realized by adding stress rods with two improved glass components on both sides of the fiber core. Stress-type polarization-maintaining optical fibers mainly rely on the difference in the thermal expansion coefficients of the embedded stress rods and the fiber core to generate thermal stress. Under the action of thermal stress, the refractive index of the material changes, thereby generating the birefringence effect.

[0027] Polarization-maintaining optical fibers work by inducing a difference in the speed of light in two perpendicular polarizations passing through the fiber. This birefringence creates two main transmission axes within the fiber, known as the fast axis and the slow axis of the fiber, respectively. Among them, the fast axis is the direction with a small refractive index, where the light transmission speed is relatively fast, and it perpendicularly passes through the midpoint of the line connecting the centers of the two stress rods; the slow axis is an optical axis passing through the centers of the two stress rods, which is the direction with a large refractive index, and the light transmission speed is relatively slow.

[0028] The FA is a key component in optical communication. It uses a substrate 102 with V-grooves to install a bundle of polarization-maintaining optical fibers on the substrate 102 at a specified interval to form an array. When producing FA products, it is necessary to align the polarization-maintaining optical fibers, rotate the polarization-maintaining optical fibers, and calibrate the slow axis or fast axis of the polarization-maintaining optical fibers to minimize the angular error. In this embodiment, the angular error should be maintained within the range of 0 ± 3°.

[0029] The existing assembly process for FA products is as follows: Place the polarization-maintaining optical fibers into the V-grooves of the substrate 102, rotate a single polarization-maintaining optical fiber manually by hand, align it through a CCD, and then fix it with paraffin. After sequentially completing the rotation and alignment of each polarization-maintaining optical fiber and adjusting the polarization-maintaining angle of each optical fiber to the standard value, fix the substrate 102 and the optical fibers with glue 103. However, in the actual operation process, due to the small diameter of the optical fiber, for example, a polarization-maintaining optical fiber with a diameter of 0.25 mm, it is difficult to rotate by hand, and it is difficult to adjust to the required value. Moreover, it is difficult to control the rotation force by hand, which is easy to damage the optical fiber and cause product scrapping.

[0030] Refer to Figures 6 to 12 , an embodiment of the present invention proposes an assembly device for a polarization-maintaining optical fiber array, which includes a connector bracket 201, a fiber arranging fixture 401, a detection component 501, and an alignment tooling 301. The connector bracket 201 and the fiber arranging fixture 401 are respectively arranged on the front and rear sides of the alignment tooling 301, and the detection component 501 is arranged on the rear side of the fiber arranging fixture 401 and is oriented towards the fiber arranging fixture 401.

[0031] In this embodiment, the alignment tooling 301 can assist the operator in rotating the polarization-maintaining optical fiber, solve the problem of difficult rotation caused by the small diameter of the polarization-maintaining optical fiber, and moreover, can protect the polarization-maintaining optical fiber, reduce the situation of damage to the polarization-maintaining optical fiber, and improve the yield of the product.

[0032] Refer to Figure 7 and Figure 8 , the alignment tooling 301 includes a rotating seat 303, a rotating rod 302, and a fixing plate 304. Among them, a plurality of rotating grooves 3031 are provided on the rotating seat 303. Refer to Figure 11, the rotating base 303 corresponds to a plurality of rotating rods 302. The rotating rods 302 are arranged in one-to-one correspondence with the rotating grooves 3031. The rotating grooves 3031 open upward and extend in the front-rear direction. The rotating grooves 3031 penetrate through the front and rear end faces of the rotating base 303. The rotating rods 302 are respectively arranged in the rotating grooves 3031 and are rotatably connected to the groove walls of the rotating grooves 3031. The rotating rods 302 extend in the front-rear direction, and the front and rear ends of the rotating rods 302 respectively extend out of the rotating grooves 3031. Refer to Figure 10 , the rotating rod 302 is provided with a positioning groove 3022 which penetrates through the front and rear ends of the rotating rod 302. During use, the polarization-maintaining optical fiber is placed into the positioning groove 3022. The fixing plate 304 is movably connected to the rotating base 303. The fixing plate 304 is used to open or close the rotating groove 3031. When the fixing plate 304 closes the rotating groove 3031, it can block the upper part of the rotating rod 302 to prevent the rotating rod 302 from disengaging from the upper part of the rotating groove 3031, further improving the stability and accuracy of the rotation of the rotating rod 302.

[0033] It can be understood that the polarization-maintaining optical fiber array product includes a product connector 101, a substrate 102, and a polarization-maintaining optical fiber. The front end of the polarization-maintaining optical fiber is connected to the product connector 101. The polarization-maintaining optical fiber array assembly device of this embodiment is used to assist in the connection between the substrate 102 and the polarization-maintaining optical fiber. When using the polarization-maintaining optical fiber array assembly device of this embodiment, place the product connector 101 of the polarization-maintaining optical fiber array product on the connector bracket 201, place the substrate 102 at the fiber arranging jig 401, arrange the rear ends of the polarization-maintaining optical fibers in the V-grooves on the substrate 102 in sequence, and the polarization-maintaining optical fibers can rotate in the V-grooves. Place the middle part of the polarization-maintaining optical fiber into the positioning groove 3022 of the rotating rod 302, fix the polarization-maintaining optical fiber to the rotating rod 302, use the fixing plate 304 to close the rotating groove 3031, and the operator rotates the rotating rod 302 by hand-held or robot-controlled means to realize the rotation of the polarization-maintaining optical fiber. Use the detection component 501 to monitor the polarization-maintaining angle of the polarization-maintaining optical fiber. When the angle is adjusted to the required value, it is determined that the polarization-maintaining optical fiber rotates in place. Rotate the polarization-maintaining optical fibers in sequence. After all the polarization-maintaining optical fibers are adjusted in place, use the glue 103 to bond the polarization-maintaining optical fibers to the substrate 102 to complete the assembly of the polarization-maintaining optical fiber array product.

[0034] It can be understood that the operator can hold the rotating rod 302 by hand and rotate the rotating rod 302 to realize the rotation of the polarization-maintaining optical fiber. Since the diameter of the rotating rod 302 is larger than that of the polarization-maintaining optical fiber, it is beneficial for the operator to hold and rotate, which can greatly reduce the difficulty of rotating the polarization-maintaining optical fiber. Moreover, since the rotating rod 302 provides protection for the polarization-maintaining optical fiber, it can avoid the situation of damage to the polarization-maintaining optical fiber and improve the yield of the product.

[0035] In this embodiment, the positioning groove 3022 is a V-shaped groove, which can more conveniently place the polarization-maintaining optical fiber. The fixation of the polarization-maintaining optical fiber to the rotating rod 302 can be achieved through paraffin. After the assembly is completed, the separation between the polarization-maintaining optical fiber and the rotating rod 302 can be achieved by removing the paraffin.

[0036] In a second aspect, an embodiment of the present invention further provides a method for assembling a polarization-maintaining optical fiber array, which uses the polarization-maintaining optical fiber array assembly device proposed in any one of the embodiments in the first aspect to assemble a polarization-maintaining optical fiber array product. It can be understood that the polarization-maintaining optical fiber array product includes a product connector 101, a substrate 102, and a polarization-maintaining optical fiber. Among them, the front end of the polarization-maintaining optical fiber is connected to the product connector 101. The polarization-maintaining optical fiber array assembly method in this embodiment can realize the connection between the polarization-maintaining optical fiber and the substrate 102.

[0037] In this embodiment, the polarization-maintaining optical fiber array assembly method includes step S100, step S200, step S300, step S400, step S500, and step S600. Refer to Figure 1 。

[0038] Step S100: Assemble the polarization-maintaining optical fiber array assembly device. Before assembling the polarization-maintaining optical fiber array product, it is necessary to assemble the polarization-maintaining optical fiber array assembly device, place the connector bracket 201, the alignment tooling 301, the fiber arranging fixture 401, and the detection component 501 in sequence from front to back, and fix them stably respectively, to prevent the displacement of each component during the process of assembling the polarization-maintaining optical fiber array product, which may affect the detection and calibration.

[0039] Step S200: Place the substrate 102 on the fiber arranging fixture 401 and place the rear end of the polarization-maintaining optical fiber in the V-groove on the substrate 102.

[0040] In this embodiment, the substrate 102 is provided with a fixing area and a placing area. Among them, the upper surface of the placing area is slightly higher than the upper surface of the fixing area. The V-groove is arranged in the placing area, and the front and rear ends of the V-groove respectively penetrate through the placing area. When placing the polarization-maintaining optical fiber, the rear end of the polarization-maintaining optical fiber is in a bare wire state, and the bare wire part is placed in the V-groove and extends to the middle position of the fixing area. Since the height of the fixing area is slightly lower than that of the placing area, when the part of the polarization-maintaining optical fiber with the outer shell is placed on the fixing area, the bare wire part can extend along the front and rear directions into the placing area, and the placing area can support the bare wire part to prevent the polarization-maintaining optical fiber from being bent at the connection between the fixing area and the placing area. When using glue 103 to fix the polarization-maintaining optical fiber and the substrate 102 later, the glue 103 is set on the fixing area and completely covers the upper surface of the fixing area. Since the polarization-maintaining optical fiber at the fixing area is not bent, the bonding strength with the substrate 102 can be improved.

[0041] Step S300: Place the product connector 101 onto the connector bracket 201. In this embodiment, the connectors are placed in the grooves on the connector bracket 201 in the order required by the product drawing. It can be understood that the connector bracket 201 can provide support for the connectors, preventing the front end of the polarization-maintaining optical fiber from bending due to the weight of the connectors, better protecting the polarization-maintaining optical fiber, and also being more conducive to subsequent alignment adjustment operations.

[0042] Step S400: Place each polarization-maintaining optical fiber into the positioning groove 3022 of each rotating rod 302, and fix each polarization-maintaining optical fiber to the corresponding rotating rod 302 respectively. After placing the polarization-maintaining optical fiber into the positioning groove 3022 and fixing it to the rotating rod 302, the polarization-maintaining optical fiber and the corresponding rotating rod 302 form an integral body. The rotating rod 302 can protect the polarization-maintaining optical fiber, preventing it from being damaged during subsequent rotation, and also making it more convenient for the operator to rotate the polarization-maintaining optical fiber.

[0043] Step S500: Rotate each rotating rod 302 in sequence according to the real-time monitoring information of the detection component 501 until the polarization angle of each polarization-maintaining optical fiber is adjusted to the standard value. The operator can hold the rotating rod 302 by hand and rotate it to achieve the rotation of the polarization-maintaining optical fiber, and monitor the polarization-maintaining optical fiber through the detection component 501. Since the diameter of the rotating rod 302 is larger than that of the polarization-maintaining optical fiber, it is beneficial for the operator to hold and rotate, which can greatly reduce the difficulty of rotating the polarization-maintaining optical fiber. Moreover, since the rotating rod 302 protects the polarization-maintaining optical fiber, it can prevent the polarization-maintaining optical fiber from being damaged and improve the yield of the product.

[0044] In this embodiment, the detection component 501 is a CCD. The alignment of the polarization-maintaining optical fiber is achieved through the CCD. The operator refers to the information presented by the CCD to learn the alignment situation of the polarization-maintaining optical fiber and adjusts the polarization-maintaining optical fiber within the range of the standard value, that is, the alignment of one polarization-maintaining optical fiber is completed.

[0045] Step S600: Fix the substrate 102 and the polarization-maintaining optical fiber. In this embodiment, glue 103 is used in this step to bond the substrate 102 and the polarization-maintaining optical fiber. At this time, the polarization angle of each polarization-maintaining optical fiber is within the range of the standard value, and the polarization-maintaining optical fiber array product formed by bonding the polarization-maintaining optical fiber and the substrate 102 has a high yield.

[0046] In some embodiments, step S100 includes step S110, step S120, and step S130. Refer to Figure 2 。

[0047] Step S110, prepare the installation platform 601, the joint bracket 201, the fiber arranging fixture 401, the detection component 501 and the alignment tooling 301. In this embodiment, the detection component 501 is a CCD. A plurality of installation holes are provided on the installation platform 601, and a plurality of grooves for placing the product joint 101 are provided on the joint bracket 201.

[0048] Step S120, install the joint bracket 201, the alignment tooling 301, the fiber arranging fixture 401 and the detection component 501 on the installation platform 601 in sequence from front to back. In this embodiment, referring to Figure 6 , the joint bracket 201, the fiber arranging fixture 401, the detection component 501 and the alignment tooling 301 are respectively fixed on the installation platform 601 through screws and installation holes, and the relative positions of each component can be flexibly adjusted.

[0049] Step S130, finely adjust the position of the rotating seat 303 to make the central axes of the rotating seat 303 and the fiber arranging fixture 401 coincide.

[0050] In some embodiments, the alignment tooling 301 further includes an adjustment structure. Referring to Figure 7 and Figure 9 , the position of the rotating seat 303 in the front - rear direction, left - right direction and up - down direction can be adjusted to realize the fine adjustment of the position of the rotating seat 303. In this embodiment, the adjustment structure includes a first adjustment structure 306, a second adjustment structure 307 and a third adjustment structure 308. Among them, the first adjustment structure 306 is used to adjust the left - right position of the rotating seat 303, the second adjustment structure 307 is used to adjust the up - down height position of the rotating seat 303, and the third adjustment structure 308 is used to adjust the front - rear position of the rotating seat 303. By adjusting the rotating seat 303 through the first adjustment structure 306, the second adjustment structure 307 and the third adjustment structure 308, the central axis of the rotating seat 303 can be kept on the same straight line as that of the fiber arranging fixture 401, so as to facilitate the subsequent alignment and adhesion of the polarization - maintaining optical fiber.

[0051] In this embodiment, the first adjustment structure 306 is used to adjust the position of the rotating seat 303 in the left - right direction to make the center line of the rotating seat 303 as consistent as possible with that of other fixtures. The first adjustment structure 306 includes a first slider 3061, a first adjustment block 3062 and a first adjustment bolt 3063. The first adjustment block 3062 is provided with a first chute 3064 and a first locking groove 3065. The first chute 3064 is arranged on the upper wall surface of the first adjustment block 3062. The first chute 3064 and the first locking groove 3065 extend along the left - right direction respectively, and the first chute 3064 and the first locking groove 3065 are communicated with each other.

[0052] In this embodiment, the first adjustment groove is provided on the front wall surface of the first adjustment block 3062. The first slider 3061 is slidably connected in the first chute 3064 and is connected to the rotating base 303. The first adjustment bolt 3063 passes through the first locking groove 3065 and is threadedly connected to the first slider 3061. The head of the first adjustment bolt 3063 abuts against the front side wall of the first adjustment block 3062.

[0053] It can be understood that after moving the first slider 3061 to an appropriate position in the first chute 3064 and aligning the rotating base 303 with the center line of the fiber arranging jig 401, by rotating the first adjustment bolt 3063, the position locking between the first adjustment block 3062 and the first slider 3061 can be achieved through the abutting action between the first adjustment bolt 3063 and the first adjustment block 3062.

[0054] The second adjustment structure 307 is used to adjust the height of the rotating base 303 to adapt to the heights of the joint bracket 201 and the fiber arranging jig 401. The second adjustment structure 307 includes a second slider 3071, a second adjustment block 3072, and a second adjustment bolt 3073. The second adjustment block 3072 is provided with a second chute and a second locking groove 3074. The second chute and the second locking groove 3074 extend in the up and down directions respectively, and the second chute and the second locking groove 3074 communicate with each other.

[0055] In this embodiment, the rotating base 303 is provided on the left side of the second adjustment block 3072. The second chute is provided on the left side wall surface of the second adjustment block 3072, while the second locking groove 3074 is provided on the right side wall surface of the second adjustment block 3072. The second slider 3071 is connected to the first adjustment block 3062 and inserted into the second locking groove 3074. The second slider 3071 can slide along the extending direction of the second locking groove 3074 to adjust the height of the first adjustment block 3062, thereby adjusting the height of the rotating base 303. The second adjustment bolt 3073 passes through the second locking groove 3074 and is threadedly connected to the second slider 3071. The second adjustment bolt 3073 extends in the left and right directions, and its head is provided at the right end. The left side wall surface of the head of the second adjustment bolt 3073 abuts against the right side wall surface of the second adjustment block 3072.

[0056] After moving the second slider 3071 to an appropriate position in the second chute and matching the height of the rotating base 303 with that of other jigs, by rotating the second adjustment bolt 3073, the position locking between the second adjustment block 3072 and the second slider 3071 can be achieved through the abutting action between the second adjustment bolt 3073 and the second adjustment block 3072.

[0057] The third adjustment structure 308 is used to adjust the position of the rotating base 303 in the front - rear direction to adapt to the front - rear positions of the fiber - arranging jig 401 and the joint bracket 201. The third adjustment structure 308 includes a base 3081, a third slider, and a third adjustment bolt 3082. The base 3081 is provided with a third chute and a third locking groove. The third chute and the third locking groove extend in the front - rear direction and communicate with each other. In this embodiment, the third chute opens downward, and the third locking groove opens upward. The third slider is slidably connected to the third chute. The third adjustment bolt 3082 passes through the second adjustment block 3072 and the third locking groove from top to bottom and is threadedly connected to the third slider. The head of the third adjustment bolt 3082 abuts against the second adjustment block 3072.

[0058] After moving the second adjustment block 3072 to a suitable position, rotate the third adjustment bolt 3082. Through the abutting action between the lower wall surface of the head of the third adjustment bolt 3082 and the second adjustment block 3072, the head of the third adjustment bolt 3082 and the third slider can provide a clamping force to the second adjustment block 3072 and the base 3081, and the position locking between the second adjustment block 3072 and the base 3081 can be achieved.

[0059] In this embodiment, referring to Figure 12 , the fiber - arranging jig 401 includes a placement table 402, a cover plate 403, and a pressing member. The placement table 402 is used to place the substrate 102, and the pressing member is used to apply pressure to the cover plate 403. After the rear end of the polarization - maintaining optical fiber is placed on the substrate 102, the cover plate 403 is used to cover the upper end of the V - groove to prevent the polarization - maintaining optical fiber located in the V - groove from jumping out of the V - groove and affecting the alignment of the CCD.

[0060] In some embodiments, step S200 includes step S210, step S220, step S230, and step S240. Referring to Figure 3 .

[0061] Step S210: Place the substrate 102 on the placement table 402 so that the V - groove of the substrate 102 extends in the front - rear direction and opens upward. In some embodiments, the placement table 402 includes a placement main body and a gasket. The rear end of the placement main body is provided with a gasket groove opening upward, and the gasket is detachably installed in the gasket groove by screws. The substrate 102 is placed above the gasket. It can be understood that the placement main body extends forward to provide a supporting force for the polarization - maintaining optical fiber.

[0062] Step S220: Place the rear ends of the polarization - maintaining optical fibers into the V - grooves respectively. The operator places the polarization - maintaining optical fibers in the V - grooves in an orderly manner according to the drawing design for subsequent adjustment operations.

[0063] Step S230: Place the cover plate 403 on the substrate 102 and cover the V-groove. The cover plate 403 covers the upper part of the V-groove, which can prevent the polarization-maintaining optical fiber from jumping out of the V-groove during the processing and affecting the alignment.

[0064] Step S240: Apply pressure to the cover plate 403 with a pressing component and ensure that the polarization-maintaining optical fiber can rotate within the V-groove.

[0065] In this embodiment, referring to Figure 12 , the pressing component includes a pressing needle 404, a tension spring 405, a control screw 407, a pressing needle bracket 406, and a pressing needle rotating shaft 4061. The pressing needle bracket 406 is connected to the side of the placement table 402 and is vertically arranged. The pressing needle 404 is rotatably connected to the pressing needle bracket 406 through the pressing needle rotating shaft 4061. The pressing needle rotating shaft 4061 extends in the front-rear direction. The pressing needle 404 can rotate around the pressing needle rotating shaft 4061. The two ends of the pressing needle 404 located at the left and right ends of the pressing needle rotating shaft 4061 are a contact end and a control end respectively. The tension spring 405 is installed on the pressing needle bracket 406. The lower end of the tension spring 405 is connected to the control end, and the upper end of the tension spring 405 is connected to the pressing needle bracket 406. The tension spring 405 can provide a force for the pressing needle 404 to rotate around the pressing needle rotating shaft 4061, so that the contact end can contact the cover plate 403 and apply a certain pressure to the cover plate 403, enabling the cover plate 403 to stably cover the V-groove.

[0066] The control screw 407 extends in the up-down direction and is threadedly connected to the pressing needle bracket 406. The lower end of the control screw 407 abuts against the upper surface of the control end. It can be understood that the contact between the control screw 407 and the control end can limit the upward rotation height of the control end, thereby restricting the magnitude of the pressure applied by the contact end to the cover plate 403 and preventing the polarization-maintaining optical fiber under the cover plate 403 from being damaged due to excessive pressure. It can be understood that by rotating the control screw 407, the height of the control bolt can be adjusted, thereby adjusting the upward rotation height of the control end and controlling the magnitude of the pressure applied to the cover plate 403 to ensure that the polarization-maintaining optical fiber located in the V-groove can rotate within the V-groove.

[0067] In some embodiments, the fiber arranging fixture 401 further includes clamping jaws 408 and a slide rail 409. There are two clamping jaws 408. The slide rail 409 extends in the left - right direction. The lower ends of the clamping jaws 408 are slidably connected to the slide rail 409. The two clamping jaws 408 can move along the extending direction of the slide rail 409 and are locked to the slide rail 409 by bolts. During use, the substrate 102 is placed between the two clamping jaws 408. The clamping jaws 408 move closer to each other and clamp the substrate 102. The clamping jaws 408 are locked with bolts to prevent the clamping jaws 408 from moving on the slide rail 409, so as to position the substrate 102 and avoid the situation of the substrate 102 shifting during the processing. It can be understood that the clamping jaws 408 can also be controlled by driving components such as air cylinders to realize the actions of moving closer to each other or moving away from each other.

[0068] In some embodiments, the fiber arranging fixture 401 further includes a position adjusting assembly, which can adjust the position of the placing table 402 in the front - rear direction or the left - right direction, or adjust the left - right position of the slide rail 409 relative to the placing table 402. In this embodiment, the position adjusting assembly includes a front - rear driving component 4021, a left - right driving component 4022, and a slide - rail driving component 4091. The output end of the front - rear driving component 4021 is connected to the body of the left - right driving component 4022. The output end of the left - right driving component 4022 is connected to the placing table 402. The body of the slide - rail driving component 4091 is installed on the side of the placing table 402, and the output end of the slide - rail driving component 4091 is drivingly connected to the slide rail 409. The front - rear driving component 4021, the left - right driving component 4022, and the slide - rail driving component 4091 can be air cylinders, electric cylinders, etc., and are not specifically limited herein.

[0069] In some embodiments, step S400 includes step S410, step S420, step S430, and step S440. Refer to Figure 4 .

[0070] Step S410, open the fixing plate 304 to expose the rotating groove 3031. In this embodiment, refer to Figure 8 and Figure 11 , one end of the rotating seat 303 in the left - right direction is provided with a locking member 3033. The locking member 3033 is detachably connected to the side wall surface of the fixing plate 304. The other end of the rotating seat 303 in the left - right direction is hinged to the fixing plate 304. The fixing plate 304 can be turned upward around the hinge point with the rotating seat 303 to open the rotating groove 3031.

[0071] Step S420, place the polarization - maintaining optical fiber into the positioning groove 3022.

[0072] Step S430: Fix the polarization-maintaining optical fiber to the front and rear ends of the rotating rod 302. It can be understood that the fixation in step S430 is temporary. By using materials such as paraffin to achieve a temporary connection between the polarization-maintaining optical fiber and the rotating rod 302, the polarization-maintaining optical fiber and the rotating rod 302 can be temporarily integrated. When the rotating rod 302 is rotated, the polarization-maintaining optical fiber can be rotated to adjust and calibrate the polarization angle.

[0073] In some embodiments, referring to Figure 10 , each rotating rod 302 includes a rod body 3021 and two fixing blocks 3023. The two fixing blocks 3023 are respectively arranged at the front and rear ends of the rod body 3021, and a rotating groove 3031 is arranged on the rod body 3021. Step S430 specifically is: Fix the polarization-maintaining optical fiber to the two fixing blocks 3023 respectively by using paraffin. It can be understood that the fixing blocks 3023 provide space for fixing the polarization-maintaining optical fiber, and fixing by paraffin is also beneficial for separating the polarization-maintaining optical fiber from the rotating rod 302 subsequently.

[0074] In some embodiments, referring to Figure 10 and Figure 11 , a limiting block 3025 is arranged on the outer periphery of the rod body 3021, and a limiting groove 3032 is arranged on the rotating seat 303. The limiting groove 3032 is located at the front and rear ends of the rotating groove 3031, and the limiting groove 3032 and the limiting block 3025 match each other. When the rod body 3021 is placed into the rotating groove 3031, the limiting block 3025 is located in the limiting groove 3032. Since the diameter of the limiting block 3025 is larger than the diameter of the rod body 3021, the limiting block 3025 and the groove wall of the limiting groove 3032 restrict each other, which can avoid the situation that the rotating rod 302 moves in the front and rear directions, further ensure the accuracy of the alignment of the polarization-maintaining optical fiber, and further improve the yield of the product.

[0075] Step S440: After each polarization-maintaining optical fiber is fixed to the rotating rod 302 respectively, cover the fixing plate 304. It can be understood that when the locking member 3033 is connected to the side wall surface of the fixing plate 304, the fixing plate 304 and the rotating seat 303 are locked to each other, and the fixing plate 304 cannot be opened automatically.

[0076] It can be understood that the locking member 3033 can be a screw, a buckle, etc. In this embodiment, a locking bolt is used as the locking member 3033. The fixing plate 304 is provided with a locking block extending downward. The locking block extends to the side of the rotating seat 303. The locking block is provided with a downward-opening bayonet. The locking bolt passes through the bayonet and is threadedly connected to the side of the rotating seat 303. Rotate the locking bolt until the head of the locking bolt abuts against the side wall of the locking block to lock the locking block.

[0077] In some embodiments, anti-slip grooves are provided on the outer periphery of the head of the locking bolt, which can increase the friction between the surface of the head of the locking bolt and the operator's hand, so as to facilitate the operator to hold the head of the locking bolt and rotate the locking bolt.

[0078] In some embodiments, referring to Figure 8 , the alignment tooling 301 further includes a locking bolt 305. The locking bolt 305 extends in the up and down direction. The locking bolt 305 passes through the fixing plate 304 and is threadedly connected to the fixing plate 304. When the locking bolt 305 is tightened, the lower end surface of the locking bolt 305 can abut against the rod body 3021 located in the rotating groove 3031.

[0079] It can be understood that after the operator rotates the rotating rod 302 with the polarization-maintaining optical fiber placed thereon to the required angle, by rotating the locking bolt 305, the lower end surface of the locking bolt 305 can be made to abut against the rod body 3021 of the rotating rod 302, thereby locking the angle of the rotating rod 302 and preventing the rotated rod 302 that has been adjusted from rotating during subsequent operations and affecting the angle of the polarization-maintaining optical fiber, further improving the yield of the product. Specifically, referring to Figure 5 , step S500 includes step S510, step S520, and step S530.

[0080] Step S510, hold the single rotating rod 302 and rotate the rotating rod 302 according to the real-time monitoring information. It can be understood that by rotating the rotating rod 302, the corresponding polarization-maintaining optical fiber can be rotated. Since the rotating rod 302 is provided and the diameter of the rotating rod 302 is much larger than that of the polarization-maintaining optical fiber, it is easier for the operator to hold and rotate during the rotation. In some embodiments, a hand-held block 3024 is provided at the front end or the rear end of the rod body 3021. The hand-held block 3024 is located on the outer periphery of the rod body 3021 and its diameter is larger than that of the rod body 3021. When the operator holds it, the holding part is at the hand-held block 3024, which can further facilitate the rotation.

[0081] Step S520, after the polarization-maintaining optical fiber corresponding to the rotating rod 302 is adjusted in place, rotate the locking bolt 305 to make the lower end surface of the locking bolt 305 abut against the side wall of the rotating rod 302. The lower end surface of the locking bolt 305 can abut against the rod body 3021 located in the rotating groove 3031, which can prevent the rotating rod 302 from automatically rotating in the rotating groove 3031, thereby locking the angle of the polarization-maintaining optical fiber that has completed the angle adjustment.

[0082] Step S530: Fix the polarization-maintaining optical fiber to the fiber arranging fixture 401 using paraffin. It can be understood that the polarization-maintaining optical fiber is connected to the placement body of the fiber arranging fixture 401 using paraffin. The placement body can provide sufficient fixing space for the polarization-maintaining optical fiber. After being fixed with paraffin, it is convenient for the operator to adjust other polarization-maintaining optical fibers, avoiding the influence on the already adjusted polarization-maintaining optical fiber during the adjustment of other polarization-maintaining optical fibers. After the assembly of the polarization-maintaining optical fiber array product is completed, the paraffin can be removed, and it is also convenient for the polarization-maintaining optical fiber to be separated from the fiber arranging fixture 401.

[0083] It can be understood that in step S500, steps S510, S520, and S530 need to be repeated to adjust and fix each polarization-maintaining optical fiber in turn until each polarization-maintaining optical fiber is adjusted.

[0084] In some embodiments, referring to Figure 7 and Figure 8 , the alignment tooling 301 is provided with two layers of rotating seats 303 and two layers of fixing plates 304. The rotating seats 303 and the fixing plates 304 are arranged in one-to-one correspondence. Rotating rods 302 are respectively arranged in the rotating grooves 3031 of the rotating seats 303 of each layer. The mutually corresponding rotating seats 303, fixing plates 304, and the rotating rods 302 placed in the corresponding rotating grooves 3031 together form a set of alignment structures, that is, the alignment tooling 301 of this embodiment is provided with two sets of alignment structures.

[0085] It can be understood that the two sets of alignment structures are arranged in the up-down direction, and the rotating seat 303 on the upper side is connected to the fixing plate 304 on the lower layer by screws. With such a setting, a larger number of polarization-maintaining optical fibers can be placed to adapt to the assembly and processing of more specifications of polarization-maintaining optical fiber array products.

[0086] In this embodiment, in step S400, first place the rotating rod 302 on the lower layer, and place the polarization-maintaining optical fibers in the positioning grooves 3022 of the rotating rod 302 on the lower layer in the order from left to right. After the positioning grooves 3022 of the rotating rod 302 on the lower layer are filled with polarization-maintaining optical fibers, place the remaining polarization-maintaining optical fibers in the positioning grooves 3022 of the rotating rod 302 on the upper layer.

[0087] In this embodiment, the placement of the polarization-maintaining optical fibers on the upper layer and the placement of the polarization-maintaining optical fibers on the lower layer are respectively carried out according to steps S410, S420, S430, and S440.

[0088] It should be noted that in this embodiment, the alignment structure is provided with two layers. The bolt hole corresponding to the locking bolt 305 of the alignment structure located in the lower layer penetrates upward through the rotating seat 303 and the fixing plate 304 of the alignment structure located in the upper layer, and avoidance holes are formed on the rotating seat 303 and the fixing plate 304 of the upper layer. Moreover, the rotating grooves 3031 provided on the rotating seats 303 of the alignment structures of the upper and lower layers are arranged staggeredly. The locking bolt 305 installed in the lower layer can be directly inserted into the fixing plate 304 of the lower layer through the avoidance hole and abuts against the rotating rod 302 of the alignment structure located in the lower layer, so as to lock the rotating rod 302 of the alignment structure in the lower layer.

[0089] In this embodiment, the head of the locking bolt 305 is provided with an internal hexagonal hole. By using a hexagonal wrench, the rotation of the locking bolt 305 can be realized, so as to lock the rotating rod 302. When locking the rotating rod 302 located in the lower layer in step S520, a hexagonal wrench can be directly inserted into the avoidance hole and contacted with the locking bolt 305 located in the lower layer to drive the locking bolt 305 in the lower layer to rotate and lock.

[0090] In this embodiment, the adjustment and fixation of the polarization-maintaining optical fiber in the lower layer are completed first, and then the adjustment and fixation of the polarization-maintaining optical fiber in the upper layer are carried out.

[0091] After all the polarization-maintaining optical fibers are adjusted and fixed, the substrate 102 is bonded to the polarization-maintaining optical fiber with glue 103. After the product is firmly bonded, the polarization-maintaining optical fiber is removed from the alignment tooling 301 in the order of the upper layer first and then the lower layer. The paraffin connecting the polarization-maintaining optical fiber and the rotating rod 302 is removed, and the paraffin connecting the polarization-maintaining optical fiber and the fiber arranging jig 401 is removed, and then the assembled polarization-maintaining optical fiber array product can be taken out from the polarization-maintaining optical fiber array assembling device, and the obtained product has a high yield.

[0092] The preferred embodiments of the present invention have been specifically described above, but the present invention is not limited to the above embodiments. Those skilled in the art can also make various equivalent variations or substitutions without departing from the spirit of the present invention, and these equivalent variations or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A polarization-maintaining fiber array assembly device, characterized in that It includes a joint bracket, a fiber arranging fixture, a detection component and an alignment tooling. The joint bracket and the fiber arranging fixture are respectively arranged on the front and rear sides of the alignment tooling, and the detection component is arranged on the rear side of the fiber arranging fixture and faces the fiber arranging fixture; the alignment tooling includes a rotating seat, a plurality of rotating rods and a fixing plate. The rotating seat is provided with a plurality of upward-opening rotating grooves. The rotating rods are respectively arranged in the rotating grooves and are rotatably connected to the groove walls of the rotating grooves. The rotating grooves penetrate through the front and rear ends of the rotating seat. The rotating rods extend in the front-rear direction and extend out of the front and rear ends of the rotating grooves. The rotating rods are provided with positioning grooves that penetrate through the front and rear ends of the rotating rods. The fixing plate is movably connected to the rotating seat to open or close the rotating grooves.

2. A method for assembling a polarization-maintaining fiber array, characterized in that, When assembling a polarization-maintaining fiber array product using the polarization-maintaining fiber array assembling device as claimed in claim 1, the polarization-maintaining fiber array product includes a product joint, a substrate and polarization-maintaining fibers. The front end of the polarization-maintaining fiber is connected to the product joint. The substrate is provided with a plurality of V-grooves. The method for assembling the polarization-maintaining fiber array includes the following steps: Assemble the polarization-maintaining fiber array assembling device; Place the substrate on the fiber arranging fixture and place the rear end of the polarization-maintaining fiber into the V-groove on the substrate; Place the product joint on the joint bracket; Place each polarization-maintaining fiber into the positioning groove of each rotating rod respectively, and fix each polarization-maintaining fiber to the corresponding rotating rod respectively; Rotate each rotating rod in sequence according to the real-time monitoring information of the detection component until the polarization-maintaining angle of each polarization-maintaining fiber is adjusted to the standard value; Fix the substrate and the polarization-maintaining fibers.

3. The polarization-maintaining optical fiber array assembly method according to claim 2, wherein The step of assembling the polarization-maintaining fiber array assembling device includes: Prepare an installation platform, a joint bracket, a fiber arranging fixture, a detection component and an alignment tooling; Install the joint bracket, the alignment tooling, the fiber arranging fixture and the detection component on the installation platform in sequence from front to back; Fine-tune the position of the rotating seat to make the central axes of the rotating seat and the fiber arranging fixture coincide.

4. The polarization maintaining fiber array assembling method according to claim 2, wherein The fiber arranging fixture includes a placement table, a cover plate and a pressing component; the step of placing the substrate on the fiber arranging fixture and placing the rear end of the polarization-maintaining fiber into the V-groove on the substrate includes: Place the substrate on the placement table so that the V-groove of the substrate extends in the front-rear direction and opens upward; Place the rear ends of the polarization-maintaining fibers into the V-grooves respectively; Place the cover plate on the substrate and cover the V-grooves; Apply pressure to the cover plate with the pressing component and ensure that the polarization-maintaining fibers can rotate in the V-grooves.

5. The assembling method of the polarization-maintaining optical fiber array according to claim 2, characterized in that, The step of placing each polarization-maintaining fiber into the positioning groove of each rotating rod respectively and fixing each polarization-maintaining fiber to the corresponding rotating rod respectively includes: Open the fixing plate to expose the rotating groove; Place the polarization-maintaining fiber into the positioning groove; Fix the polarization-maintaining fiber to the front and rear ends of the rotating rod; After each polarization-maintaining fiber is fixed to the rotating rod respectively, cover the fixing plate.

6. The method for assembling a polarization maintaining fiber array according to claim 5, wherein, Each of the rotating rods includes a rod body and two fixing blocks. The two fixing blocks are respectively arranged at the front and rear ends of the rod body, and the rotating groove is arranged on the rod body. The step of fixing the polarization-maintaining optical fiber to the front and rear ends of the rotating rod is: using paraffin to fix the polarization-maintaining optical fiber to the two fixing blocks respectively.

7. The method for assembling a polarization-maintaining fiber array according to claim 2, wherein The alignment tooling further includes a locking bolt. The locking bolt is arranged vertically through the fixing plate and is threadedly connected to the fixing plate. The steps of sequentially rotating each rotating rod according to the real-time monitoring information of the detection component until the polarization-maintaining angle of each polarization-maintaining optical fiber is adjusted to the standard value include: Grasp a single rotating rod and rotate the rotating rod according to the real-time monitoring information. After the polarization-maintaining optical fiber corresponding to the rotating rod is adjusted in place, rotate the locking bolt so that the lower end surface of the locking bolt abuts against the side wall of the rotating rod. Use paraffin to fix the polarization-maintaining optical fiber to the fiber arranging fixture. Repeat the above steps to adjust and fix each polarization-maintaining optical fiber in turn.

8. The assembling method of the polarization maintaining fiber array according to claim 2, characterized in that The alignment tooling is provided with two layers of rotating seats and two layers of fixing plates. The rotating seats and the fixing plates are arranged in one-to-one correspondence. The rotating seat located in the upper layer is connected to the fixing plate located in the lower layer. Each rotating rod is arranged in the rotating groove of each rotating seat. In the step of respectively placing each polarization-maintaining optical fiber into the positioning groove of each rotating rod and respectively fixing the polarization-maintaining optical fiber to the corresponding rotating rod, first place the polarization-maintaining optical fiber into the positioning groove of the rotating rod located in the lower layer. After the positioning grooves of the rotating rods in the lower layer are filled with the polarization-maintaining optical fibers, then place the remaining polarization-maintaining optical fibers into the positioning grooves in the upper layer.

9. The method for assembling a polarization-maintaining fiber array according to claim 8, wherein After completing the step of fixing the substrate and the polarization-maintaining optical fiber, remove the polarization-maintaining optical fiber from the alignment tooling in the order of first the upper layer and then the lower layer.

10. The method for assembling a polarization-maintaining optical fiber array according to claim 2, wherein The step of fixing the substrate and the polarization-maintaining optical fiber is: using glue to bond the substrate and the polarization-maintaining optical fiber.

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