A preform fiber ferrule design method for secondary wiring

Abstract

The application discloses a prefabricated optical fiber ferrule design method for secondary wiring, and relates to the field of power transmission and transformation engineering design. The prefabricated optical fiber ferrule design method comprises the following steps: identifying loss influencing factors of an optical fiber connector, and calculating optical fiber misalignment loss and optical fiber tilt connection loss based on the loss influencing factors; designing an optical ferrule body and a PIN guide needle of the optical fiber connector based on the calculation results of the optical fiber loss, so as to obtain an optical fiber ferrule design scheme; and predicting performance of the optical fiber connector in environmental and mechanical scenes in combination with the optical fiber ferrule design scheme, and optimizing the optical fiber ferrule design scheme based on the performance. The application realizes loss reduction when the optical fiber is inserted and connected in pair by designing the ferrule with the PIN guide needle and the guide hole, and by adopting the ferrule end face and the ferrule core inclination angle grinding and the alignment accuracy compensation mode, so that the transmission loss of the optical signal is minimized, and the reliability and performance of the communication system are improved.

Description

Technical Field

[0001] This invention relates to the field of power transmission and transformation engineering design, and more specifically, to a design method for prefabricated fiber optic ferrules for secondary wiring. Background Technology

[0002] A fiber optic connector is a device used to connect fiber optic cables to achieve precise transmission of optical signals. It makes connecting and disconnecting optical fibers more convenient while maintaining high efficiency and low loss in signal transmission. Fiber optic connectors are designed to minimize optical loss during insertion, which is an important indicator for evaluating connector performance. High-quality connectors can maintain low loss and high performance even after multiple insertion and removal operations.

[0003] Prefabricated fiber optic connectors play a crucial role in optical communication systems. Their design aims to meet the ever-increasing demands for connection density, improve connector performance, reduce physical space footprint, and optimize the maintainability and reliability of fiber optic networks. With the continuous expansion of data centers and communication networks, the demand for high-density connector layouts is constantly increasing. The design of prefabricated fiber optic ferrules focuses on optimizing optical performance, including reducing insertion loss and improving return loss. By precisely controlling the manufacturing process of optical components, using high-quality materials, and conducting precise optical simulations, it is ensured that the connectors maintain excellent optical performance even in high-density layouts, meeting the requirements of long-term use and frequent connections, and delaying issues such as optical component aging.

[0004] No effective solutions have yet been proposed to address the problems in the relevant technologies. Summary of the Invention

[0005] In view of the problems in related technologies, this invention proposes a design method for prefabricated fiber optic ferrules for secondary wiring, so as to overcome the above-mentioned technical problems existing in the existing related technologies.

[0006] Therefore, the specific technical solution adopted by the present invention is as follows:

[0007] A prefabricated fiber optic ferrule design method for secondary wiring, the prefabricated fiber optic ferrule design method comprising:

[0008] S1. Identify the loss factors of fiber optic connectors and calculate fiber misalignment loss and fiber tilt connection loss based on the loss factors.

[0009] S2. Based on the fiber loss calculation results, the optical ferrule and PIN guide of the optical fiber connector are designed respectively, and the optical ferrule design scheme is obtained.

[0010] S3. Combine the fiber optic ferrule design scheme to predict the performance of the fiber optic connector in environmental and mechanical scenarios, and optimize the fiber optic ferrule design scheme based on the performance.

[0011] Preferably, the factors affecting the loss of the fiber optic connector include the quality of the fiber end face, the mating accuracy of the fiber optic connector, the type of fiber, the usage conditions, and environmental factors; the type of fiber includes single-mode fiber and multimode fiber.

[0012] Preferably, the calculation of fiber misalignment loss and fiber tilt connection loss based on loss influencing factors includes:

[0013] The misalignment loss of single-mode fiber and multimode fiber is calculated separately, and the misalignment state of the fiber in the horizontal and vertical directions is controlled based on the misalignment loss calculation results to compensate for the mating accuracy of the fiber optic connector.

[0014] The fiber core tilt connection loss of single-mode fiber and multimode fiber is calculated separately, and the fiber tilt angle is controlled within a preset range based on the fiber core tilt connection loss.

[0015] Preferably, the formula for calculating the misalignment loss of a single-mode fiber is:

[0016]

[0017] The formula for calculating the misalignment loss of multimode optical fiber is:

[0018]

[0019] In the formula, L d L represents the misalignment loss of a single-mode fiber. n K represents the misalignment loss of multimode fiber; d d represents the fiber misalignment loss coefficient; d represents the radial or lateral misalignment distance between two fibers; a represents the fiber mode field radius.

[0020] Preferably, the fiber optic ferrule design scheme includes a ferrule end face angle polishing design scheme, a fiber core tilt angle grinding design scheme, and an alignment offset error compensation design scheme.

[0021] Preferably, the polishing design scheme for the end face angle of the ferrule includes:

[0022] Calculate the return loss of the fiber optic ferrule, and polish the fiber optic ferrule at a preset tilt angle based on the calculation results to reduce Fresnel reflection in the fiber optic ferrule connection.

[0023] The refractive index of the external medium is kept consistent with that of the fiber optic ferrule, and the end face angle of the fiber optic ferrule is controlled within a preset range.

[0024] Preferably, the refractive index of the external medium is kept consistent with that of the fiber optic ferrule, which is 1.445-1.465; and the end face angle of the fiber optic ferrule is controlled within a preset range, which is 7.0°-8.0°.

[0025] Preferably, the formula for calculating the return loss of the fiber optic ferrule is:

[0026] RL = -10 × log 10 (R);

[0027]

[0028] In the formula, RL represents the return loss of the fiber optic ferrule; R in λ represents the Fresnel reflection coefficient under perpendicular incidence; R represents the Fresnel reflection coefficient; n² represents the refractive index of the external medium of the optical fiber; λ represents the wavelength of the optical fiber; e represents the base of the natural logarithm. This indicates the diameter of the fiber mode field.

[0029] This invention reduces fiber optic insertion loss by designing a ferrule with PIN guide pins and guide holes, and by using ferrule end face and fiber core tilt angle grinding and alignment accuracy compensation methods. This minimizes optical signal transmission loss, improves the reliability and performance of the communication system, and also reduces errors during installation and maintenance, lowers the maintenance cost of fiber optic connectors, and ensures the long-term stable operation of optical communication and data transmission systems.

[0030] Preferably, predicting the performance of the fiber optic connector in environmental scenarios by combining the fiber optic ferrule design scheme, and optimizing the fiber optic ferrule design scheme based on the performance performance includes:

[0031] Based on the design scheme of fiber optic ferrule, the behavior and response characteristics of fiber optic connectors under different environmental conditions were simulated using finite element analysis technology.

[0032] Historical performance data of fiber optic connectors are obtained to establish a performance prediction model. Behavioral response characteristics are used as input to predict the performance of fiber optic connectors under different environmental conditions.

[0033] Analyze the performance of fiber optic connectors to determine the design parameters that have the greatest impact on performance, and optimize the fiber optic ferrule design based on the analysis results.

[0034] Preferably, the behavioral response characteristics of the fiber optic connector under different environmental conditions, based on the fiber optic ferrule design and using finite element analysis technology, include:

[0035] The design scheme of the fiber optic ferrule is extracted and a three-dimensional geometric model of the fiber optic connector is established using finite element analysis technology. Material properties are set for each component in the three-dimensional geometric model.

[0036] The three-dimensional geometric model is meshed and boundary environmental conditions, including fixed support points, load types, and load regions, are applied.

[0037] The behavior response of the 3D geometric model under different boundary conditions is solved using a pre-configured solver, and the solver configuration is adjusted to ensure that the solution process converges.

[0038] The response results of the three-dimensional geometric model under different boundary environmental conditions are obtained, and the response results are fused to obtain the behavioral response characteristics of the fiber optic connector.

[0039] The beneficial effects of this invention are as follows: By designing a ferrule with PIN guide pins and guide holes, and by using ferrule end face and ferrule core tilt angle grinding and alignment accuracy compensation methods, this invention reduces the loss during fiber insertion and docking, minimizes the transmission loss of optical signals, and improves the reliability and performance of the communication system. At the same time, this design can also reduce errors in the installation and maintenance process, reduce the maintenance cost of fiber optic connectors, and provide a guarantee for the long-term stable operation of optical communication and data transmission systems. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0041] Figure 1 This is a flowchart of a prefabricated fiber optic ferrule design method for secondary wiring according to an embodiment of the present invention;

[0042] Figure 2 This is a schematic diagram of the lateral misalignment of optical fiber connections in a prefabricated optical fiber ferrule design method for secondary wiring according to an embodiment of the present invention.

[0043] Figure 3 This is a schematic diagram of radial misalignment of optical fiber connection in a prefabricated optical fiber ferrule design method for secondary wiring according to an embodiment of the present invention.

[0044] Figure 4 This is a schematic diagram of a single-mode end-face connection type MT ferrule in a prefabricated fiber optic ferrule design method for secondary wiring according to an embodiment of the present invention.

[0045] Figure 5 This is a schematic diagram of a multimode end-face connection type MT ferrule in a prefabricated fiber optic ferrule design method for secondary wiring according to an embodiment of the present invention.

[0046] Figure 6 This is one of the schematic diagrams of a prefabricated fiber optic ferrule with PIN guide pins and guide holes in a design method for secondary wiring according to an embodiment of the present invention;

[0047] Figure 7 This is a second schematic diagram of a prefabricated fiber optic ferrule with PIN guide pins and guide holes in a design method for secondary wiring according to an embodiment of the present invention.

[0048] Figure 8 This is a schematic diagram of the MT ferrule PIN guide pin design structure in a prefabricated fiber optic ferrule design method for secondary wiring according to an embodiment of the present invention. Detailed Implementation

[0049] To further illustrate the various embodiments, the present invention provides accompanying drawings, which are part of the disclosure of the present invention. These drawings are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these drawings, those skilled in the art should be able to understand other possible implementation methods and the advantages of the present invention.

[0050] According to an embodiment of the present invention, a prefabricated fiber optic ferrule design method for secondary wiring is provided.

[0051] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments, such as... Figure 1 As shown, according to an embodiment of the present invention, a prefabricated fiber optic ferrule design method for secondary wiring includes:

[0052] S1. Identify the factors affecting the loss of the fiber optic connector, and calculate the fiber misalignment loss and fiber tilt connection loss based on the factors affecting the loss.

[0053] The factors affecting the loss of fiber optic connectors include fiber end face quality, connector mating accuracy, fiber type, usage conditions, and environmental factors; fiber types include single-mode fiber and multimode fiber.

[0054] The calculation of fiber misalignment loss and fiber tilt connection loss based on loss influencing factors includes:

[0055] The misalignment loss of single-mode fiber and multimode fiber is calculated separately, and the misalignment state of the fiber in the horizontal and vertical directions is controlled based on the misalignment loss calculation results to compensate for the mating accuracy of the fiber optic connector.

[0056] The fiber core tilt connection loss of single-mode fiber and multimode fiber is calculated separately, and the fiber tilt angle is controlled within a preset range based on the fiber core tilt connection loss.

[0057] Among fiber optic connectors, single-mode fiber (SMF) and multi-mode fiber (MMF) are two main types of optical fiber. Their main differences lie in core diameter, number of modes, transmission distance, and data transmission rate. Single-mode fiber typically has a core diameter between 8.3 μm and 10 μm. Due to its small core diameter, it only allows one mode, i.e., one light propagation path, to pass through. Multi-mode fiber typically has a core diameter between 50 μm and 62.5 μm. Its larger core diameter allows multiple modes to pass through. Fiber optic connectors are widely used in power and communication engineering, and their connection insertion must meet transmission performance requirements, as shown in Table 1.

[0058] Table 1: Transmission Performance of Multimode / Singlemode Fiber Optic Connectors

[0059] Project Name Performance requirements Insertion loss 4 / 8 core: ≤0.6dB; 12 / 24 core: ≤0.8dB

[0060] It should be noted that the main factors affecting fiber optic connector loss include fiber end-face quality, connector mating accuracy, fiber type, connector usage, and environmental factors. Fiber end-face quality and connector mating accuracy can be improved through manufacturing processes. Fiber end-face quality factors refer to the fact that poor end-face quality, such as contamination, scratches, unevenness, etc., will increase insertion loss. Connector mating accuracy includes the perpendicularity of the end face and the alignment of the fiber core.

[0061] Poor alignment accuracy leads to increased optical transmission loss. Misalignment loss is caused by reduced alignment accuracy due to axial or radial misalignment at the ends of the two optical fibers. Figure 2 The image shows the lateral misalignment of the optical fiber core. Figure 3 This refers to the radial misalignment of the fiber core. The formula for calculating the misalignment loss in single-mode fiber is:

[0062]

[0063] The formula for calculating the misalignment loss of multimode optical fiber is:

[0064]

[0065] In the formula, L d L represents the misalignment loss of a single-mode fiber. n K represents the misalignment loss of multimode fiber; d d represents the fiber misalignment loss coefficient; d represents the radial or lateral misalignment distance between two fibers; a represents the fiber mode field radius.

[0066] It should be noted that when designing prefabricated fiber optic connectors, skewed fiber end faces can also lead to decreased transmission efficiency of optical signals at non-ideal positions on the connector contact surface, resulting in increased insertion loss. This loss caused by fiber tilt is due to the offset of the optical signal transmission path on the connector contact surface caused by the tilt angle of the fiber end face during connector insertion. The resulting reflection and scattering increase insertion loss, and the tilt angle also reduces the mode coupling efficiency of the fiber, preventing some optical signals from being effectively transmitted to the receiving end. The formulas for calculating the connection loss of single-mode and multimode prefabricated fiber core tilt are as follows:

[0067]

[0068] In the formula, L q Indicates the tilted connection loss of the single-mode prefabricated fiber core; L m Indicates the core tilt connection loss of multimode prefabricated fiber; α represents the core tilt angle on the male and female plug faces when the prefabricated fiber pluggable connector is connected; K α The loss coefficient represents the tilt angle; Δ represents the refractive index coefficient of the optical fiber.

[0069] It should be noted that, as shown in the calculation formulas for tilted connection loss of single-mode and multimode prefabricated fiber cores, the loss is directly proportional to the square of the tilt angle. The larger the tilt angle α of the fiber end face, the greater the loss. 2 A larger / Δ value leads to increased loss, and the core tilt loss of single-mode fiber is far more affected by the tilt angle than that of multimode fiber. Therefore, controlling the fiber tilt angle within a reasonable range is crucial for ensuring low-loss connections in fiber optic connector design.

[0070] S2. Based on the fiber loss calculation results, the optical ferrule and PIN guide of the optical fiber connector are designed respectively, and the optical ferrule design scheme is obtained.

[0071] It should be noted that using a crimp-type ferrule results in low insertion loss, allows for a large number of ferrules to be inserted, and facilitates subsequent maintenance. The designed ferrule consists of a male connector with pre-formed PIN guides, a female connector with guide holes on the end face, and an adapter for connecting the connectors. Inside the connector, the optical fiber is fixed in the fiber aperture of the MT (Mechanically Transferable) sleeve. When one connector is connected to another, precise positioning between the two connectors is achieved by aligning the PIN guides and guide holes with the corresponding MT sleeves. The arranged optical fibers are aligned with the two guide holes with sub-micron accuracy, and each fiber protrudes from the MT sleeve end face by no more than 6 micrometers.

[0072] The fiber optic ferrule design scheme includes a ferrule end face angle polishing design scheme, a fiber core tilt angle grinding design scheme, and an alignment offset error compensation design scheme.

[0073] The ferrule end face angle polishing design scheme includes:

[0074] The return loss of the fiber optic ferrule is calculated, and the fiber optic ferrule is polished at a preset tilt angle based on the calculation results to reduce Fresnel reflection in the fiber optic ferrule connection.

[0075] To reduce Fresnel reflections in fiber optic ferrules with vertically polished ends, the ferrule body needs to be polished at a certain tilt angle, and the end face needs to be ground using a precision polishing machine. For single-mode fiber ferrules, the return loss must be greater than 40dB. The formula for calculating the return loss of a fiber optic ferrule is as follows:

[0076] RL = -10 × log 10 (R);

[0077]

[0078] In the formula, RL represents the return loss of the fiber optic ferrule; R in λ represents the Fresnel reflection coefficient under perpendicular incidence; R represents the Fresnel reflection coefficient; n2 represents the refractive index of the external medium of the optical fiber; λ represents the wavelength of the optical fiber; e represents the base of the natural logarithm, approximately equal to 2.71828. This indicates the diameter of the fiber mode field.

[0079] The refractive index of the external medium is kept consistent with that of the fiber optic ferrule, and the end face angle of the fiber optic ferrule is controlled within a preset range.

[0080] Among them, the refractive index of the external medium is kept consistent with that of the fiber ferrule, which is 1.445-1.465, and the wavelength of 1310nm is more suitable for single-mode fiber. The preset range of the end face angle of the fiber ferrule is 7.0°-8.0°.

[0081] It should be noted that the fiber core tilt grinding design includes:

[0082] In calculating the connection loss caused by the core tilt angle of prefabricated optical fibers for single-mode and multimode applications, the maximum core tilt angle is controlled to not exceed 0.4°, which ensures that the connection loss does not exceed 0.1dB.

[0083] It should be noted that the alignment offset error compensation design includes:

[0084] Because the gap-based MT connection structure is more complex than conventional fiber optic connectors, the core wire position in the short sleeve axis can shift when the MT sleeve is in place. Besides this shift caused by the mating force, the gap between the PIN and the guide hole also contributes to this shift, and this misalignment increases connection loss, as shown in the calculation formulas for misalignment loss in single-mode and multimode fibers. Therefore, this invention designs a ferrule that can compensate for shift errors occurring during the guiding of the mating ferrule, and compensates for the short sleeve axis error in the design of dimensions such as the guide hole diameter, guide hole spacing, and PIN diameter.

[0085] Specifically, taking the design of a multimode 12-core ferrule as an example, with an insertion loss not exceeding 0.8dB, a typical fiber mode field radius of 31.25μm is selected. Based on the misalignment loss formula for multimode fiber, the core misalignment should be less than 8.2583μm. Core misalignment is often caused by the connector's guiding mechanism, with lateral offset being the main component. By combining the eccentricity of each fiber in each connector, the lateral offset between each paired fiber pair can be obtained. The formula for calculating the lateral offset between the i-th pair of mating fibers is:

[0086]

[0087] In the formula, x Δi For the short sleeve direction offset, y Δi This is due to the offset in the direction of the long sleeve.

[0088] An alignment offset error compensation amount is added to the design in the axial direction. Thus, the offset calculation in the axial direction consists of three parts: plug guide mechanism offset, fiber optic eccentricity vector offset, and alignment error compensation.

[0089] Therefore, two types of ferrules were designed: single-mode and multi-mode fiber ferrules. Their specific design dimensions and structures are detailed below. Figures 4-5 As shown, the schematic diagram of the insert body structure with PIN guide pins and guide holes is as follows: Figure 6-7 As shown (where A represents the guide hole and B represents the PIN pin), in addition, Figure 8 The specific design parameters and structure of the MT ferrule PIN are shown in further detail.

[0090] Figures 4-5 The values ​​marked in the table are the diameter and tolerance of the ferrule PIN pins and PIN pin holes, as well as the inner diameter and tolerance of the fiber optic hole. Taking a single-row 12-core array as an example, the dimensions with tolerance values ​​required for precision manufacturing were designed, and the ferrule PIN pin design parameters are shown in Table 2.

[0091] Table 2: MT ferrule PIN guide pin parameters

[0092] mark Minimum value (mm) Maximum value (mm) A 0.6985 0.6990 C 4.5995 4.6005 D 6.3 6.5 U 2.4 2.5 BA 0.2 0.4 BB 0.2 0.5 BC 6.0 6.5

[0093] S3. Combine the fiber optic ferrule design scheme to predict the performance of the fiber optic connector in environmental and mechanical scenarios, and optimize the fiber optic ferrule design scheme based on the performance.

[0094] This includes predicting the performance of fiber optic connectors in environmental scenarios by combining fiber optic ferrule design schemes, and optimizing fiber optic ferrule design schemes based on performance performance, including:

[0095] Based on the design scheme of fiber optic ferrules, the behavioral response characteristics of fiber optic connectors under different environmental conditions were simulated using finite element analysis technology.

[0096] Among them, the behavioral response characteristics of fiber optic connectors under different environmental conditions, based on the fiber optic ferrule design scheme and using finite element analysis technology, include:

[0097] The design scheme of the fiber optic ferrule is extracted and a three-dimensional geometric model of the fiber optic connector is established using finite element analysis. Material properties are set for each component in the three-dimensional geometric model. The three-dimensional geometric model is meshed and boundary environmental conditions, including fixed support points, load types, and load regions, are applied. The behavior response of the three-dimensional geometric model under different boundary conditions is solved using a pre-configured solver, and the solver configuration is adjusted to ensure convergence of the solution process. The response results of the three-dimensional geometric model under different boundary environmental conditions are obtained, and the response results are fused to obtain the behavior response characteristics of the fiber optic connector.

[0098] Historical performance data of fiber optic connectors are obtained to establish a performance prediction model. Behavioral response characteristics are used as input to predict the performance of fiber optic connectors under different environmental conditions.

[0099] Analyze the performance of fiber optic connectors to determine the design parameters that have the greatest impact on performance, and optimize the fiber optic ferrule design based on the analysis results.

[0100] It should be noted that the performance of prefabricated fiber optic connectors is particularly important under different environments, such as long-term application in actual engineering, long-distance transportation, or accidental drop and impact. To evaluate the performance of the connectors under different environments, mechanical performance and environmental tests were conducted, as shown in Table 3. The test environment was an indoor environment with a temperature of (19–26)℃ and a relative humidity of (30–35)%. The main instrument used for testing was an optical patch cord testing system (MAP-230B model). Temperature testing was achieved using several instruments, including a (GTH-408-60-CP) constant temperature test chamber, a (GTH-150-60-CP-SD) constant temperature and humidity test chamber, a (MHU-225SR) constant temperature and humidity test chamber, and a constant temperature and humidity chamber (ETH-408-40-CP-SD). Impact and vibration tests were conducted using a (CP-100) impact test bench and an electric vibration test system (D-600-5 / super).

[0101] Table 3: Influence of Light Source Test Wavelength on Loss of Prefabricated Fiber Optic Connectors by Mechanical and Environmental Factors

[0102]

[0103] Specifically, as shown in Table 3, the mechanical performance and environmental test results reveal that, in the mechanical performance tests, the mechanical repeatability durability test results indicate that the connector (850nm prefabricated fiber connector) performance remains stable during multiple insertion and removal processes, with no significant increase in insertion loss. Furthermore, the end-face coating material exhibits good adhesion and abrasion resistance under repeated insertion and removal and mechanical vibration conditions, ensuring that the fiber end face remains smooth and intact during long-term use, further reducing fluctuations in insertion loss. The vibration test simulates the vibration environment of the connector during transportation and actual use, with results ranging from 0.05 to 0.17 dB. Although there are some variations, the overall increase in loss is within an acceptable range. The impact test results show that, compared to other mechanical performance tests, impact and collision cause a larger change in connector loss. However, the maximum increase in connector loss is still within a controllable range. In temperature and humidity-related tests, the connector maintains good performance, with smaller changes compared to the mechanical performance tests.

[0104] In summary, by utilizing the above-mentioned technical solutions of this invention, the present invention reduces the loss during fiber insertion and mating by designing a ferrule with PIN guide pins and guide holes, and by employing ferrule end face and ferrule core tilt angle grinding and alignment accuracy compensation methods. This minimizes the transmission loss of optical signals, improves the reliability and performance of the communication system, and at the same time, this design can also reduce errors during installation and maintenance, lower the maintenance cost of fiber optic connectors, and provide a guarantee for the long-term stable operation of optical communication and data transmission systems.

[0105] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A design method for prefabricated fiber optic ferrules for secondary wiring, characterized in that, The prefabricated fiber optic ferrule design method includes: S1. Identify the loss factors of fiber optic connectors and calculate fiber misalignment loss and fiber tilt connection loss based on the loss factors. S2. Based on the fiber loss calculation results, the optical ferrule and guide pin of the optical fiber connector are designed respectively, and the optical ferrule design scheme is obtained. S3. Combine the fiber optic ferrule design scheme to predict the performance of the fiber optic connector in environmental and mechanical scenarios, and optimize the fiber optic ferrule design scheme based on the performance. S3 includes: Based on the design scheme of fiber optic ferrule, the behavior and response characteristics of fiber optic connectors under different environmental conditions were simulated using finite element analysis technology. Historical performance data of fiber optic connectors are obtained to establish a performance prediction model. Behavioral response characteristics are used as input to predict the performance of fiber optic connectors under different environmental conditions. Analyze the performance of fiber optic connectors to determine the design parameters that have the greatest impact on performance, and optimize the fiber optic ferrule design based on the analysis results.

2. The prefabricated fiber optic ferrule design method for secondary wiring according to claim 1, characterized in that, The factors affecting the loss of the fiber optic connector include the quality of the fiber end face, the mating accuracy of the fiber optic connector, the type of fiber, the usage conditions, and environmental factors. The fiber types include single-mode fiber and multimode fiber.

3. The prefabricated fiber optic ferrule design method for secondary wiring according to claim 2, characterized in that, The calculation of fiber misalignment loss and fiber tilt connection loss based on loss influencing factors includes: The misalignment loss of single-mode fiber and multimode fiber is calculated separately, and the misalignment state of the fiber in the horizontal and vertical directions is controlled based on the misalignment loss calculation results to compensate for the mating accuracy of the fiber optic connector. The fiber core tilt connection loss of single-mode fiber and multimode fiber is calculated separately, and the fiber tilt angle is controlled within a preset range based on the fiber core tilt connection loss.

4. A prefabricated fiber optic ferrule design method for secondary wiring according to claim 3, characterized in that, The formula for calculating the misalignment loss of the single-mode fiber is as follows: ； The formula for calculating the misalignment loss of the multimode optical fiber is as follows: ； In the formula, L d This indicates the misalignment loss of a single-mode fiber. L n This indicates the misalignment loss of multimode fiber; K d This represents the fiber misalignment loss coefficient. d This indicates the radial or lateral misalignment distance between two optical fibers; a This indicates the radius of the fiber mode field.

5. A prefabricated fiber optic ferrule design method for secondary wiring according to claim 4, characterized in that, The fiber optic ferrule design scheme includes a ferrule end face angle polishing design scheme, a fiber core tilt angle grinding design scheme, and an alignment offset error compensation design scheme.

6. A prefabricated fiber optic ferrule design method for secondary wiring according to claim 5, characterized in that, The polishing design scheme for the end face angle of the ferrule includes: Calculate the return loss of the fiber optic ferrule, and polish the fiber optic ferrule at a preset tilt angle based on the calculation results to reduce Fresnel reflection in the fiber optic ferrule connection. The refractive index of the external medium is kept consistent with that of the fiber optic ferrule, and the end face angle of the fiber optic ferrule is controlled within a preset range.

7. A prefabricated fiber optic ferrule design method for secondary wiring according to claim 6, characterized in that, The refractive index of the external medium, which is kept consistent with that of the fiber optic ferrule, is 1.445-1.

465. The preset range for controlling the end face angle of the fiber optic ferrule within a preset range is 7.0°-8.0°.

8. A prefabricated fiber optic ferrule design method for secondary wiring according to claim 7, characterized in that, The formula for calculating the return loss of the optical fiber ferrule is as follows: ； ； In the formula, RL This indicates the return loss of the fiber optic ferrule; R in This represents the Fresnel reflection coefficient under perpendicular incidence. R Indicates the Fresnel reflection coefficient; n 2 Represents the refractive index of the external medium of the optical fiber; λ Indicates the wavelength of the optical fiber; e The base of the natural logarithm; This indicates the diameter of the fiber mode field.

9. A prefabricated fiber optic ferrule design method for secondary wiring according to claim 1, characterized in that, The fiber optic ferrule-based design scheme and the finite element analysis technique used to simulate the behavioral response characteristics of the fiber optic connector under different environmental conditions include: The design scheme of the fiber optic ferrule is extracted and a three-dimensional geometric model of the fiber optic connector is established using finite element analysis technology. Material properties are set for each component in the three-dimensional geometric model. The three-dimensional geometric model is meshed and boundary environmental conditions, including fixed support points, load types, and load regions, are applied. The behavior response of the 3D geometric model under different boundary conditions is solved using a pre-configured solver, and the solver configuration is adjusted to ensure that the solution process converges. The response results of the three-dimensional geometric model under different boundary environmental conditions are obtained, and the response results are fused to obtain the behavioral response characteristics of the fiber optic connector.

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