Optical path structure and optical module

Abstract

The present invention discloses an optical path structure and an optical module, which comprises a PCB board, the PCB board is detachably connected with a slotted magnetic ring, the slotted magnetic ring is provided with a first mounting groove and a second mounting groove which are interconnected, an isolator is provided in the first mounting groove, and the optical fiber array fixing fixture is fixed in the second mounting groove. The present invention can effectively reduce the influence of temperature changes on the position of optical parts, reduce the risk of isolators falling off, and improve the overall stability and reliability of the optical module.

Description

Technical Field

[0001] The invention relates to an optical path structure, belonging to the technical field of optical modules, and in particular to an optical path structure and an optical module. Background Art

[0002] With the advent of the digital age, the Internet industry is booming, which has directly led to the continued growth in demand for network communication equipment. As an important part of network communication equipment, optical modules are also constantly innovating and developing to meet the growing market demand. At the same time, the rapid rise of new-generation information technologies such as cloud computing, artificial intelligence, and big data has greatly increased the demand for computing power, thereby accelerating the construction of cloud computing infrastructure. This trend has led to an increasing demand for high-speed optical modules such as 200G, 400G, 800G, and even 1.6T.

[0003] At present, the mainstream manufacturing method of optical modules is to fix LED lasers and passive devices together with structural adhesives. Specifically, the common practice is to use glue to bond a single free-space isolator to a fiber array (FA). However, this method has some significant technical defects. First, optical parts bonded with glue are prone to large positional displacement when the temperature rises, which will directly affect the performance stability of the optical module. Secondly, multiple bonding operations will increase the risk of isolators falling off, which will lead to increased signal attenuation and ultimately affect the stability of the entire communication system.

[0004] In view of the above situation, the industry urgently needs to develop a new optical path structure to solve the above defects in the prior art. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide an optical path structure and an optical module in response to the technical defects existing in the prior art, which can effectively reduce the impact of temperature changes on the position of optical parts, reduce the risk of isolators falling off, and improve the overall stability and reliability of the optical module; at the same time, the present invention has the technical advantages of facilitating component replacement and reducing maintenance costs.

[0006] The technical solution adopted by the present invention to solve its technical problem is: the present invention discloses an optical path structure including a PCB board, the PCB board is detachably connected with a slotted magnetic ring, the slotted magnetic ring is provided with a first mounting groove and a second mounting groove that are interconnected, an isolator is provided in the first mounting groove, and a fiber optic array fixing fixture is fixed to the second mounting groove.

[0007] In a preferred embodiment of the present invention, an isolator positioning seat is arranged in the first installation groove, and an isolator is arranged on the isolator positioning seat.

[0008] In a preferred embodiment of the present invention, a positioning buckle is fixedly connected to the PCB board, a pair of symmetrically arranged claws are provided at one end of the positioning buckle, a PIN needle fixing block is connected to the positioning buckle through the claws, a slot magnetic ring mounting hole for installing a slot magnetic ring is provided on the PIN needle fixing block, and a PIN needle is connected to the axial limit of the end of the PIN needle fixing block.

[0009] In a preferred embodiment of the present invention, the positioning buckle is provided with positioning pins, and the PCB board is provided with positioning holes corresponding to the positioning pins one by one.

[0010] In a preferred embodiment of the present invention, a PIN needle limiting plate is arranged between the clamping jaw and the PIN needle fixing block, a PIN needle limiting hole is arranged on the PIN needle limiting plate, and the width of the PIN needle limiting hole is smaller than the diameter of the PIN needle.

[0011] In a preferred embodiment of the present invention, the PIN pin is provided with an axial positioning ring groove for cooperating with the PIN pin limiting hole, and the positioning ring groove is arranged in a one-to-one correspondence with the PIN pin limiting hole.

[0012] In a preferred embodiment of the present invention, the thickness of the PIN needle limiting plate is not greater than the distance between the clamping jaw and the PIN needle fixing block.

[0013] In a preferred embodiment of the present invention, the isolator includes a first polarizer, a Faraday rotator and a second polarizer, the first polarizer and the second polarizer are right-angled trapezoids, the Faraday rotator is a cube, and the first polarizer and the second polarizer are glued to both sides of the Faraday rotator in a 180° rotational symmetric manner.

[0014] In a preferred embodiment of the present invention, the isolator includes a first polarizer, a Faraday rotator and a second polarizer, a first glass strip and a second glass strip are arranged between the first polarizer and the second polarizer, the Faraday rotator is arranged between the first glass strip and the second glass strip, the first polarizer and the second polarizer are right-angled trapezoids, the first glass strip, the second glass strip and the Faraday rotator are all cubes, and the first polarizer and the second polarizer are glued to both sides of the Faraday rotator in a 180° rotational symmetric manner.

[0015] The invention also discloses an optical module, which comprises an optical path structure.

[0016] The beneficial effects of the present invention are as follows: the present invention effectively solves the problems of stability, reliability and maintenance cost existing in the prior art through innovative structural design, and provides a more efficient, reliable and economical solution for the field of high-speed optical communication. This new structure not only improves the stability and reliability of the optical module under different environmental conditions, but also lays a solid foundation for the development of future optical communication technology. Further, the optical part structure of the present invention is a replaceable structure, which saves the time of curing glue, simplifies the coupling process, and reduces the difficulty of the packaging process, so it effectively solves the problem of waste of raw materials, reduces manufacturing costs, maintenance costs, and improves production capacity. When an optical device in the optical module is abnormal, only the passive device needs to be replaced through the structure of the present invention. Because the angle of the polarizer is realized by grinding, the angle of the polarizer can be flexibly adjusted according to different application requirements. At the same time, the present invention can greatly reduce the angle tolerance by more than ten times; further, the present invention overcomes the technical defect of using glue to directly stick the isolator to the module in the prior art: when the isolator component is damaged or defective, it cannot be repaired and disassembled, resulting in the scrapping of the entire product. By using the technical solution of the present invention, this technical problem can be effectively overcome, and components can be replaced quickly and conveniently, reducing maintenance costs.

[0017] First, the present invention significantly improves the flexibility and maintainability of the optical path structure by adopting a detachably connected slotted magnetic ring design. The first mounting groove and the second mounting groove provided on the slotted magnetic ring are used to install the isolator and the optical fiber array fixing fixture respectively. This modular design allows each optical element to be replaced or adjusted independently, greatly reducing the maintenance cost and difficulty. At the same time, the isolator is no longer glued to the front end of the optical channel of the array FA, ​​thereby solving the problem of increased optical path attenuation due to excessive temperature and the risk of the glue-bonded isolator falling off.

[0018] Secondly, the present invention introduces an innovative positioning and connection mechanism. By setting positioning buckles and positioning holes on the PCB board, and coordinating the design of the PIN pin fixing block and the PIN pin limiting plate, the precise positioning and stable connection of the components of the optical path structure are achieved. In particular, the use of a double PIN pin connection method not only improves the assembly accuracy, but also significantly simplifies the coupling process, improves production efficiency, and effectively reduces production costs. This design not only reduces the position offset caused by temperature changes, but also greatly improves the performance stability of the optical module.

[0019] The optical path structure provided by the present invention has the following significant advantages and beneficial effects:

[0020] First, the present invention significantly improves the flexibility and maintainability of the optical path structure by adopting a detachably connected slotted magnetic ring design. The first mounting groove and the second mounting groove provided on the slotted magnetic ring are used to install the isolator and the optical fiber array fixing fixture respectively. This modular design not only enables each optical element to be replaced or adjusted independently, greatly reducing the maintenance cost and difficulty, but also solves the demagnetization problem caused by temperature changes when the free space isolator is working. The structure of the slotted magnetic ring ensures that the isolator can maintain stable magnetic properties under various temperature conditions, thereby improving the long-term reliability of the optical module.

[0021] Secondly, the present invention introduces an innovative positioning and connection mechanism. By setting positioning buckles and positioning holes on the PCB board, and coordinating the design of the PIN pin fixing block and the PIN pin limiting plate, the precise positioning and stable connection of the components of the optical path structure are achieved. In particular, the use of a double PIN pin connection method not only improves the assembly accuracy, but also significantly simplifies the coupling process, improves production efficiency, and effectively reduces production costs. This design not only reduces the position offset caused by temperature changes, but also greatly improves the performance stability of the optical module.

[0022] Furthermore, the present invention realizes glue-free connection at the front end of the optical channel of the array FA through the ingenious design of the isolator positioning seat. This innovation effectively solves the problem of increased attenuation caused by the traditional glue fixing method in a high temperature environment, and also eliminates the risk of the glue-bonded isolator falling off. This glue-free connection method not only improves the stability of optical performance, but also significantly extends the service life of the optical module, and at the same time lays the foundation for the application of the present invention in high-power scenarios.

[0023] In addition, the present invention optimizes the design of the isolator structure. The present invention uses a combination of a right-angle trapezoidal polarizer and a cubic rotator / crystal, which not only improves the transmission quality of the optical signal, but also enhances the anti-seismic performance of the overall structure.

[0024] Finally, the positioning buckle of the present invention adopts an innovative buckle structure on both sides, which makes it easy to replace an optical component when it fails. This not only reduces the maintenance difficulty of the optical module, but also significantly reduces the waste of the entire module being scrapped due to a single component failure, thereby further reducing the overall operating cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0026] Figure 1 is a schematic diagram of the optical path structure of the present invention;

[0027] Figure 2 It is a schematic diagram of a PCB board and a positioning buckle of the optical path structure of the present invention;

[0028] Figure 3 It is a side view of the PCB board and the positioning buckle of the optical path structure of the present invention;

[0029] Figure 4 It is a schematic diagram of the installation of the positioning buckle and the PIN needle fixing block of the optical path structure of the present invention;

[0030] Figure 5 is a schematic diagram of a PIN needle of the optical path structure of the present invention;

[0031] Figure 6 It is a schematic diagram of the installation of the PIN needle and the PIN needle limiting plate of the optical path structure of the present invention;

[0032] Figure 7 yes Figure 6 AA section view;

[0033] Figure 8 is a schematic diagram of a slot magnetic ring of the present invention;

[0034] Fig. 9 is a schematic diagram of a first isolator of the present invention;

[0035] Fig.10 is a top view of a first isolator of the present invention;

[0036] Fig.11 is a top view of a first isolator of the present invention;

[0037] Fig.12 is a schematic diagram of a second isolator of the present invention;

[0038] Fig.13 It is a schematic diagram of a second isolator of the present invention. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0040] Example 1

[0041] like Figure 1-7 As shown, this embodiment provides an optical path structure, which is mainly composed of a PCB board, a slotted magnetic ring, an isolator, an optical fiber array fixing fixture, a positioning clip, a PIN needle fixing block and a PIN needle. Reliable connection and precise positioning are achieved between the components through precise design.

[0042] First, the basis of the entire optical path structure is the PCB board 6. As the main carrier, the PCB board 6 not only carries other components, but also provides necessary circuit connections. On the PCB board 6, a detachable slot magnetic ring 5 is designed. This detachable design increases the flexibility of the structure and facilitates later maintenance and replacement.

[0043] The slotted magnetic ring 5 is one of the core components of the present structure, and is provided with two interconnected mounting grooves: a first mounting groove 5.1 and a second mounting groove 5.2. The first mounting groove 5.1 is mainly used to accommodate the isolator, while the second mounting groove 5.2 fixes the optical fiber array fixing fixture 1. This design makes the installation and adjustment of optical components more convenient.

[0044] In the first mounting groove 5.1, an isolator positioning seat 7 is provided. The main function of the isolator positioning seat 7 is to accurately position and fix the isolator. In this way, the isolator can be stably installed in a predetermined position to ensure its normal operation.

[0045] A positioning buckle 8 is also fixed to the PCB board 6. A pair of symmetrically arranged clamping claws 8.1 are provided at one end of the positioning buckle 8. The design of the pair of clamping claws 8.1 increases the stability of the structure and also provides connection points for other components. The positioning buckle 8 is connected to the PIN pin fixing block 9 through the clamping claws 8.1.

[0046] The PIN pin fixing block 9 is another important component. The PIN pin fixing block 9 not only realizes the axial limit of the PIN pin, but also accurately ensures the axial center distance of the two PIN pins. A slot magnetic ring mounting hole 9.1 for mounting the slot magnetic ring 5 is provided on the PIN pin fixing block 9. This design ensures that the slot magnetic ring 5 can be firmly installed in the predetermined position. In addition, the end of the PIN pin fixing block 9 is also axially limited to connect the PIN pin 11. The PIN pin 11 plays a key role in electrical connection and positioning in the entire structure.

[0047] In order to further improve the positioning accuracy, a positioning pin is provided on the positioning buckle 8, and a positioning hole is provided on the PCB board 6 corresponding thereto. This pin-hole matching design ensures accurate alignment between the components.

[0048] A PIN stop plate 10 is provided between the clamping jaw 8.1 and the PIN fixing block 9. A PIN stop hole 10.1 is provided on the PIN stop plate 10, and its width is carefully designed to be smaller than the diameter of the PIN 11. This design can effectively limit the movement of the PIN 11 and improve the stability of the overall structure.

[0049] In order to achieve more accurate positioning, an axial positioning annular groove is provided on the PIN needle 11. The annular groove is arranged in a one-to-one correspondence with the PIN needle limiting hole 10.1, and through this correspondence, the accurate positioning of the PIN needle 11 in the axial direction can be ensured.

[0050] It is worth noting that the thickness design of the PIN stop plate 10 has also been carefully considered. Its thickness is not greater than the distance between the clamping jaw 8.1 and the PIN fixing block 9. This design ensures that the PIN stop plate 10 can be installed smoothly without affecting the normal operation of other components.

[0051] Through the above design, the optical path structure of this embodiment realizes accurate positioning and reliable connection between various components. This structure not only improves the assembly accuracy, but also enhances the overall stability. At the same time, the detachable design also facilitates later maintenance and replacement, and increases the service life of the product.

[0052] In addition, this structure also solves some problems existing in traditional optical path structures. For example, mechanical connection instead of glue bonding effectively avoids the problem of positional displacement of optical parts in high temperature environments. At the same time, the modular design also makes it easy to replace an optical part when it fails, reducing maintenance costs.

[0053] The optical path structure provided in this embodiment achieves the characteristics of high precision, high stability and easy maintenance through carefully designed components and their connection methods, and provides new technical support for the development of high-speed optical modules.

[0054] Example 2

[0055] like Figure 8-11 As shown, the isolator of this embodiment is mainly composed of a slotted magnetic ring 5, an optical fiber array fixing fixture 1 and an integrated isolator. This design aims to improve the stability, reliability and performance of the optical module and simplify the assembly process.

[0056] The slotted magnetic ring 5 is the core supporting component of the entire structure. Two key mounting slots are designed inside it: the first mounting slot 5.1 and the second mounting slot 5.2. The first mounting slot 5.1 is used to fix the isolator, while the second mounting slot 5.2 is used to fix the optical fiber array fixing fixture 1. The two mounting slots are connected to form a complete optical path system. It is worth noting that the width of the first mounting slot 5.1 is greater than the width of the second mounting slot 5.2. This design takes into account the different size requirements of the isolator and the optical fiber array fixing fixture 1, ensuring that each component can be accurately positioned and fixed.

[0057] The integrated isolator consists of three main parts: the first polarizer 2, the Faraday rotator 3 and the second polarizer 4. The integrated design of these three parts greatly improves the stability and reliability of the isolator. Specifically, the first polarizer 2 and the second polarizer 4 are both right-angled trapezoids, while the Faraday rotator 3 is a cube. The widths of these three components are the same, ensuring the consistency and stability of the optical path.

[0058] In terms of assembly, the first polarizer 2 and the second polarizer 4 are arranged 180° rotationally symmetrically relative to the Faraday rotator 3. This symmetrical design not only optimizes the optical path, but also improves the transmission quality of the optical signal. The first polarizer 2 and the second polarizer 4 are respectively glued to the two sides of the Faraday rotator 3 to form a stable whole. The two rectangular planes of the Faraday rotator 3 correspond to the rectangular planes of the first polarizer 2 and the second polarizer 4 in shape. This precise geometric matching further improves the stability and optical performance of the assembly.

[0059] The design of the slotted magnetic ring 5 also takes into account the installation requirements of the isolator. The width of the first installation slot 5.1 is greater than the width of the first polarizer 2. This design provides sufficient space for the installation and adjustment of the isolator, which is conducive to precise positioning and fixing.

[0060] The optical fiber array fixing fixture 1 is an important component for connecting the optical fiber array and the isolator. It is installed in the second installation groove 5.2 of the slot magnetic ring 5 to ensure the precise alignment between the optical fiber array and the isolator.

[0061] The design of this optical path structure reflects several important technical considerations. First, the design of the integrated isolator reduces the relative displacement that may occur in traditional multi-component isolators and improves overall stability. Secondly, the design of the slotted magnetic ring 5 not only provides a stable support, but also achieves precise positioning of each component through a reasonable slot layout. Furthermore, the design of the first mounting slot 5.1 being wider than the width of the isolator facilitates the installation and adjustment of the isolator and helps improve assembly efficiency and accuracy.

[0062] In general, this optical path structure effectively solves the problems of stability, reliability and assembly difficulty in traditional optical modules through innovative design and precise geometric configuration. It not only simplifies the production process, but also improves product performance, providing an optimized solution for the field of high-speed optical communications.

[0063] Specifically, the right-angled trapezoidal design of the first polarizer 2 and the second polarizer 4, combined with the cubic shape of the Faraday rotator 3, forms a geometrically perfectly matched whole. This design not only ensures the accuracy of the optical path, but also increases the stability of the overall structure. The same width design of the first polarizer 2, the Faraday rotator 3, and the second polarizer 4 further ensures the consistency and stability of the optical signal during transmission.

[0064] The connection design of the first mounting groove 5.1 and the second mounting groove 5.2 inside the slot magnetic ring 5 provides a continuous and stable channel for the transmission of optical signals. The design that the width of the first mounting groove 5.1 is greater than the width of the second mounting groove 5.2 not only meets the different size requirements of the isolator and the optical fiber array fixing fixture 1, but also provides a larger operating space for the installation and adjustment of the isolator.

[0065] This optical path structure is expected to play an important role in practical applications and promote the further development of optical communication technology. It provides a stable and efficient basic component for high-speed and high-reliability optical communication systems, helping to meet the growing demand for data transmission.

[0066] Example 3

[0067] Based on Example 2, this example further optimizes the optical path structure, which is mainly reflected in the design of the isolator positioning seat. This improvement is intended to improve the positioning accuracy and stability of the isolator, thereby further improving the overall performance of the optical module.

[0068] Specifically, a special isolator positioning seat is provided in the first mounting slot 5.1 of the slotted magnetic ring 5. The design and material selection of this positioning seat have been carefully considered. The positioning seat can be processed with glass or ceramic materials, both of which have excellent thermal stability and mechanical strength, and can maintain a stable shape in various working environments, thereby ensuring the precise positioning of the isolator.

[0069] Four grooves are machined on the upper surface of the isolator positioning seat, which is a key innovation of this embodiment. The design of these four grooves is not random, but is precisely calculated and positioned. Through this structural design, the center distance of the isolator can be accurately controlled to ensure that the relative positions of multiple isolators in the horizontal direction remain stable. At the same time, this design can also accurately control the angle between the isolator and the transmitted light, which is crucial to ensuring the transmission quality of the optical signal.

[0070] In practical applications, the integrated isolator (consisting of the first polarizer 2, the Faraday rotator 3 and the second polarizer 4) can be firmly mounted on this positioning seat. The design of the four grooves provides a clear installation position for the isolator, greatly reducing human operation errors and improving assembly accuracy and consistency.

[0071] This improved design solves the problem of inaccurate isolator positioning in traditional optical modules. The position and angle of the isolator can remain stable under temperature changes or external vibrations, which is important for maintaining the long-term reliability of the optical module.

[0072] In addition, the use of the isolator locating seat also simplifies the maintenance and replacement process. If the isolator needs to be replaced, just remove the old isolator from the locating seat and install the new isolator into the preset groove without complicated adjustment process.

[0073] The improved design of this embodiment further improves the performance and reliability of the optical path structure by precisely controlling the position and angle of the isolator. It not only improves the transmission quality of the optical signal, but also enhances the stability of the entire optical module under various working conditions, providing more reliable technical support for the development of high-speed optical communication systems.

[0074] Example 4

[0075] like Figure 12-13 As shown, this embodiment provides another isolator structure, in which the first polarizer 2 and the second polarizer 4 are arranged at intervals along the X-axis direction, which are respectively located at the two ends of the structure, and functionally form the starting point and the end point of the optical signal processing. Between the first polarizer 2 and the second polarizer 4, two glass strips are arranged at intervals along the Z-axis direction. The first glass strip 12 is close to the polarizer, and the second glass strip 13 is close to the analyzer. The Faraday rotator 3, which is the core of the structure, is precisely placed between the two glass strips and is located at the center of the entire structure. The material of the Faraday rotator 3 can be selected from garnet crystals.

[0076] The first polarizer 2 and the second polarizer 4 are both designed with a right-angled trapezoidal body, which is not only conducive to the processing of optical signals, but also convenient for the assembly and fixation of the entire structure. More noteworthy is that the first polarizer 2 and the second polarizer 4 are 180° rotationally symmetrical relative to the Y axis. This symmetrical design not only enhances the stability of the structure, but also helps to improve the consistency and reliability of optical signal processing. Although there are differences in function, the shapes of the first polarizer 2 and the second polarizer 4 can be exactly the same, which simplifies the manufacturing process and helps to reduce production costs.

[0077] In terms of material selection and shape design, the first glass strip 12, the second glass strip 13 and the Faraday rotator 3 are all in a cubic shape. This regular geometric shape facilitates precise processing and assembly, ensuring the stability and reliability of the entire structure. It is particularly worth mentioning that the thickness of the first glass strip 12 is optimized to be twice that of the second glass strip 13. This asymmetric thickness design is based on optical principles and practical application requirements, and helps to optimize the transmission and processing of optical signals.

[0078] When the optical signal enters the isolator structure, it first passes through the first polarizer 2, where the optical signal is adjusted to a specific polarization state. Then, the optical signal passes through the first glass strip 12, the Faraday rotator 3 and the second glass strip 13 in sequence. In this process, the Faraday rotator 3 plays a key role, which uses the Faraday effect to change the polarization direction of the optical signal. Finally, the optical signal reaches the second polarizer 4, where the final signal processing is completed. Throughout the process, the precise arrangement and specific design of each component ensure that the optical signal can be transmitted in the best state, while effectively blocking any possible reverse signal interference. In a preferred embodiment of the present invention, the isolator includes a first polarizer 2, a Faraday rotator 3 and a second polarizer 4, the first polarizer 2 and the second polarizer 4 are right-angled trapezoids, the Faraday rotator 3 is a cube, and the first polarizer 2 and the second polarizer 4 are 180° rotationally symmetrically glued to both sides of the Faraday rotator 3.

[0079] In a preferred embodiment of the present invention, the isolator includes a first polarizer 2, a Faraday rotator 3 and a second polarizer 4, a first glass strip 12 and a second glass strip 13 are arranged between the first polarizer 2 and the second polarizer 4, a Faraday rotator 3 is arranged between the first glass strip 12 and the second glass strip 13, the first polarizer 2 and the second polarizer 4 are right-angled trapezoids, the first glass strip 12, the second glass strip 13 and the Faraday rotator 3 are all cubes, and the first polarizer 2 and the second polarizer 4 are glued to both sides of the Faraday rotator 3 in a 180° rotational symmetric manner.

[0080] Example 5

[0081] This example describes the manufacturing steps of the optical path structure in detail, showing the entire process from a single optical component to a complete optical module. This manufacturing process reflects the characteristics of precision optical manufacturing and emphasizes the importance of each step and its impact on the performance of the final product.

[0082] Step 1: Assembly of the One-Piece Isolator

[0083] First, the first polarizer 2 and the second polarizer 4 are respectively attached to the two sides of the Faraday rotator 3 to form an integrated structure. This step requires highly precise alignment and a stable bonding process to ensure the perfect combination of the three components. During the bonding process, the thickness of the adhesive layer needs to be controlled to be uniform to avoid stress, thereby ensuring optical performance.

[0084] Step 2: Particle separation in the separator

[0085] Use a precision cutter to granulate the large piece of separator. This step requires the cutter to have high precision and good stability to ensure that each separator after granulation is of uniform size, with smooth edges and no cracks. The cutting speed and cooling need to be controlled during the cutting process to avoid the influence of thermal stress on the performance of the separator.

[0086] Step 3: Grinding of the Isolator

[0087] The two sides of the isolator after granulation are precisely ground to the specified angle to form an integrated free space isolator. This step directly affects the optical performance of the isolator and requires the use of high-precision grinding equipment and processes. The angle and surface quality need to be strictly controlled during the grinding process to ensure that the incident and exit angles of light meet the design requirements.

[0088] Step 4: Assembly of the Fiber Array

[0089] First, process the front end of the optical fiber, and then use a special assembly fixture to fix the V-groove substrate. Then put the processed optical fibers in order, and then place the glass cover plate on the optical fiber to ensure that the front end of the V-groove substrate is flush with the front end of the glass cover plate. Finally, apply UV optical glue and cure it to firmly bond the three parts. This step requires a high degree of precision and stability to ensure the correct positioning and fixation of the optical fiber in the V-groove.

[0090] Step 5: Fiber array end face processing

[0091] Grind and polish the assembled array FA front-end optical fiber. This step directly affects the transmission quality of the optical signal, and requires the use of precise grinding and polishing equipment to control the polishing pressure, speed and time to obtain the ideal end face quality.

[0092] Step 6: Final Assembly and Debugging

[0093] First, UV glue is added to the rear end of the slot magnetic ring 5, and then the array FA is placed in the rear end of the slot magnetic ring 5, and the integrated isolator is placed in the front end of the slot magnetic ring 5. Precise debugging is performed under the coupling machine until the qualified indicators are met. Finally, the glue is cured to fix all optical parts in the correct position. This step requires high-precision coupling equipment and skilled operating skills to ensure that the optical performance of the final product meets the design requirements.

[0094] It should be understood that the size of the serial numbers of the steps in the above embodiments does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0095] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the appended claims of the present invention.

Claims

1. An optical path structure, characterized in that: The invention comprises a PCB board (6), the PCB board (6) being detachably connected to a slotted magnetic ring (5), the slotted magnetic ring (5) being provided with a first mounting groove (5.1) and a second mounting groove (5.2) which are interconnected, the first mounting groove (5.1) being provided with an isolator, and the second mounting groove (5.2) being fixed with an optical fiber array fixing fixture (1); a positioning buckle (8) being fixedly connected to the PCB board (6), one end of the positioning buckle (8) being provided with a pair of symmetrically arranged clamping claws (8.1), the positioning buckle (8) being connected to a PIN pin fixing block (9) via the clamping claws (8.1), the PIN pin fixing block (9) being provided with a slotted magnetic ring mounting hole (9.1) for mounting the slotted magnetic ring (5), and the end of the PIN pin fixing block (9) being axially limited and connected with a PIN pin (11).

2. The optical path structure according to claim 1, characterized in that: An isolator positioning seat (7) is arranged in the first installation groove (5.1), and an isolator is arranged on the isolator positioning seat (7).

3. The optical path structure according to claim 1, characterized in that: The positioning buckle (8) is provided with a positioning pin, and the PCB board (6) is provided with positioning holes corresponding one to one to the positioning pins.

4. The optical path structure according to claim 1, characterized in that: A PIN pin limiting plate (10) is provided between the clamping jaw (8.1) and the PIN pin fixing block (9), and a PIN pin limiting hole (10.1) is provided on the PIN pin limiting plate (10), wherein the width of the PIN pin limiting hole (10.1) is smaller than the diameter of the PIN pin (11).

5. The optical path structure according to claim 4, characterized in that: The PIN needle (11) is provided with an axial positioning ring groove for cooperating with the PIN needle limiting hole (10.1), and the positioning ring groove and the PIN needle limiting hole (10.1) are arranged in a one-to-one correspondence.

6. The optical path structure according to claim 4, characterized in that: The thickness of the PIN needle limiting plate (10) is no greater than the distance between the clamping jaw (8.1) and the PIN needle fixing block (9).

7. The optical path structure according to claim 1, characterized in that: The isolator comprises a first polarizer (2), a Faraday rotator (3) and a second polarizer (4); the first polarizer (2) and the second polarizer (4) are right-angled trapezoidal bodies; the Faraday rotator (3) is a cube; the first polarizer (2) and the second polarizer (4) are glued to two sides of the Faraday rotator (3) in a 180° rotationally symmetrical manner.

8. The optical path structure according to claim 1, characterized in that: The isolator comprises a first polarizer (2), a Faraday rotator (3) and a second polarizer (4); a first glass strip (12) and a second glass strip (13) are arranged between the first polarizer (2) and the second polarizer (4); the Faraday rotator (3) is arranged between the first glass strip (12) and the second glass strip (13); the first polarizer (2) and the second polarizer (4) are right-angled trapezoidal bodies; the first glass strip (12), the second glass strip (13) and the Faraday rotator (3) are all cubes; and the first polarizer (2) and the second polarizer (4) are glued to two sides of the Faraday rotator (3) in a 180° rotationally symmetrical manner.

9. An optical module, characterized in that: Comprising the optical path structure as described in any one of claims 1-8.

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