Efficient plugging type micro-connection structure system of multi-core optical fiber and connection method thereof

Abstract

The invention relates to the technical field of multi-core optical fiber connection, and provides a multi-core optical fiber high-efficiency plugging type micro-connection structure system and a connection method thereof.The system comprises a multi-core optical fiber connector body, an optical fiber plugging terminal, an optical fiber alignment auxiliary terminal and an optical fiber dynamic correction terminal; the multi-core optical fiber connector body is used for being connected with an optical fiber core of a multi-core optical fiber; the optical fiber plugging and unplugging terminal is used for realizing plugging and unplugging operation of the multi-core optical fiber connector body and the butt joint seat and simultaneously realizing mechanical alignment of the multi-core optical fiber connector body and the butt joint seat; the optical fiber alignment auxiliary terminal is used for assisting the multi-core optical fiber to realize micron-order alignment in the connection process through positioning and dynamic adjustment; the optical fiber dynamic correction terminal is used for correcting optical fiber connection offset caused by temperature change, stress and manufacturing errors in real time and maintaining the stability of the system. The method has the effect of improving the connection quality of the multi-core optical fiber.

Description

Technical Field

[0001] The present invention relates to the technical field of multi-core optical fiber connection, and in particular to a high-efficiency plug-in type micro-connection structure system of multi-core optical fibers and a connection method thereof. Background Art

[0002] Multi-core optical fiber is a new type of optical fiber characterized by the presence of multiple independent cores in a common cladding region. These cores can transmit optical signals independently, so multi-core optical fiber can transmit multiple signals at the same time, significantly improving the transmission capacity, and is suitable for application scenarios that require high bandwidth and low latency, such as data center interconnection, high-performance computing, and sensor networks. The design of multi-core optical fiber enables it to achieve low-crosstalk space-division multiplexing optical signal transmission over long distances. By adopting a fluorine-doped cladding refractive index profile structure, multi-core optical fiber can reduce the crosstalk between adjacent cores, thereby improving the stability and reliability of communication. In addition, multi-core optical fiber has typical application prospects in the field of optical fiber communications. The multi-core optical fiber plug-in connection structure belongs to an optical fiber connector and is a multi-core, multi-channel plug-in connector.

[0003] Now many multi-core optical fiber connection structures have been developed. After a lot of searching and reference, we found that the multi-core optical fiber connection structures in the prior art are such as the multi-core optical fiber connection structures disclosed in the publication numbers CN118915240A, CN116088103A, CN106033139A, EP4047402A1, and US20180231720A1. These multi-core optical fiber connection structures generally include: a multi-core optical fiber connector body and an adjustment module; the multi-core optical fiber connector body is used to connect all the optical fiber cores of the multi-core optical fiber, so that the multi-core optical fiber can be connected to the optical fiber hole of the equipment, and the adjustment module is used to adjust the connection state between the optical fiber core and the multi-core optical fiber connector body. Since the adjustment mode of the above-mentioned multi-core optical fiber connection structure is relatively single and lacks more sophisticated monitoring and adjustment, it is not conducive to the use scenarios with higher precision requirements, resulting in the defect of reduced efficiency of the use of multi-core optical fibers. Summary of the invention

[0004] The object of the present invention is to propose a high-efficiency pluggable micro-connection structure system and a connection method for multi-core optical fibers in view of the shortcomings of the above-mentioned multi-core optical fiber connection structure.

[0005] The present invention adopts the following technical solution:

[0006] An efficient pluggable micro-connection structure system for multi-core optical fibers, comprising a multi-core optical fiber connector body, an optical fiber plug-in terminal, an optical fiber alignment auxiliary terminal and an optical fiber dynamic correction terminal; the multi-core optical fiber connector body is used to connect to the optical fiber cores of the multi-core optical fiber; the optical fiber plug-in terminal is used to realize the plug-in and pull-out operation of the multi-core optical fiber connector body and the docking seat, and at the same time realize the mechanical alignment of the multi-core optical fiber connector body and the docking seat; the optical fiber alignment auxiliary terminal is used to assist the multi-core optical fiber in realizing micron-level alignment during the connection process through positioning and dynamic adjustment; the optical fiber dynamic correction terminal is used to correct the optical fiber connection offset caused by temperature changes, stress, and manufacturing errors in real time to maintain the stability of the system;

[0007] The fiber optic plug-in terminal includes a plug-in connection module and a guide locking module; the plug-in connection module is used to complete the mechanical plug-in and pull-out operation of the multi-core fiber optic connector body and the docking seat; the guide locking module is used to guide the multi-core fiber optic connector body during the plug-in and pull-out process and provide a stable mechanical locking function.

[0008] Optionally, the optical fiber alignment auxiliary terminal includes a flexible positioning module, a dynamic adjustment module and an error detection module; the flexible positioning module is installed in the multi-core optical fiber connector body, and is used to buffer and support the position of the optical fiber core of the multi-core optical fiber through a flexible positioning spring; the dynamic adjustment module is installed in the multi-core optical fiber connector body, and is used to adjust the micron-level position of the optical fiber core in the multi-core optical fiber connector body in real time according to the offset between the optical fiber core and the corresponding optical fiber jack of the docking seat; the error detection module is installed in the docking seat, and is used to detect the alignment error of the optical fiber core during the connection process, and feed back the deviation information to the dynamic adjustment module.

[0009] Optionally, the optical fiber dynamic correction terminal includes a thermal expansion correction module and a stress distribution adjustment module; the thermal expansion correction module is used to adjust in real time the optical fiber connection angle deviation of each optical fiber core caused by temperature changes; the stress distribution adjustment module is used to correct the stress error caused by stress in the connection structure.

[0010] Optionally, the dynamic adjustment module includes an error feedback submodule, an adjustment offset value calculation submodule and a position correction submodule; the error feedback submodule is used to read the real-time error feedback of the error detection module; the adjustment offset value calculation submodule is used to calculate the adjustment offset value parameters of each optical fiber core according to the offset of each optical fiber core in the error feedback provided by the error feedback submodule; the position correction submodule is used to adjust the position of the corresponding optical fiber core in the multi-core optical fiber connector body according to the calculation result of the adjustment offset value parameters, so as to complete the micron-level position correction.

[0011] Optionally, the thermal expansion correction module includes a correction angle analysis submodule and a correction angle output submodule; the correction angle analysis submodule is used to analyze the optical fiber connection angle deviation caused by the thermal expansion effect caused by temperature change; the correction angle output submodule is used to output the corresponding correction angle according to the analysis result of the optical fiber connection angle deviation; the stress distribution adjustment module includes a nonlinear angle analysis submodule, a nonlinear correction degree output submodule and a comprehensive angle correction execution submodule; the nonlinear angle analysis submodule is used to analyze the stress error caused by uneven stress or nonlinear behavior of the material; the nonlinear correction degree output submodule is used to output the nonlinear correction degree according to the analysis result of the stress error; the comprehensive angle correction execution submodule is used to send the corresponding dynamic correction instruction to the position correction submodule according to the correction angle and the nonlinear correction degree; the dynamic correction instruction is used to drive the position correction submodule to adjust the angle of the optical fiber core to complete the dynamic correction.

[0012] The efficient plug-in type micro-connection method of multi-core optical fiber is applied to the efficient plug-in type micro-connection structure system of the multi-core optical fiber as described above, and the efficient plug-in type micro-connection method of the multi-core optical fiber comprises:

[0013] S1, realizing the plugging and unplugging operation of the multi-core optical fiber connector body and the docking seat, and realizing the mechanical alignment of the multi-core optical fiber connector body and the docking seat;

[0014] S2, through positioning and dynamic adjustment, assists multi-core optical fibers to achieve micron-level alignment during the connection process;

[0015] S3, real-time correction of fiber connection deviation caused by temperature change, stress, and manufacturing error to maintain system stability.

[0016] The beneficial effects achieved by the present invention are:

[0017] 1. By setting up a multi-core optical fiber connector body, an optical fiber plug-in terminal, an optical fiber alignment auxiliary terminal and an optical fiber dynamic correction terminal, the efficient plug-in micro-connection structure system of the multi-core optical fiber can realize the optimization of the whole process from plug-in to long-term stability, which is beneficial to improve the plug-in alignment accuracy and connection stability of the optical fiber core, thereby solving the micron-level offset problem of multi-core optical fiber during connection and use, improving the use efficiency of multi-core optical fiber, and thus helping to improve the reliability and transmission efficiency of optical fiber communication.

[0018] 2. Through the setting of flexible positioning module, dynamic adjustment module and error detection module, the fiber alignment auxiliary terminal can assist in micron-level alignment of the optical fiber core during the plugging and unplugging process through flexible positioning buffer and real-time error detection, thereby avoiding signal loss caused by mechanical errors during the plugging and unplugging process of the optical fiber, which is beneficial to ensure the accuracy of the optical fiber connection and the convenience of the connection operation.

[0019] 3. Through the setting of thermal expansion correction module and stress distribution adjustment module, the optical fiber dynamic correction terminal can correct the optical fiber core connection deviation caused by temperature change and uneven stress distribution in real time, which is beneficial to dynamically compensate for the influence of environmental and mechanical factors during the use of optical fiber, thereby maintaining the long-term stability of multi-core optical fiber connection, which is beneficial to improve the reliability and efficiency of multi-core optical fiber system.

[0020] 4. Through the setting of the error feedback submodule, the adjustment offset value calculation submodule and the position correction submodule, the dynamic adjustment module can realize the collection and processing of real-time error feedback, which is conducive to accurately calculating the adjustment offset value parameters of the optical fiber core, and then driving the position correction submodule to complete the micron-level correction of the optical fiber core, which is conducive to improving the alignment accuracy of the multi-core optical fiber plug-in and unplug ends.

[0021] 5. Through the setting of the correction angle analysis submodule and the correction angle output submodule, the thermal expansion correction module can output correction instructions according to the angle deviation caused by temperature changes, which is conducive to dynamically adjusting the connection angle of the optical fiber core, thereby compensating for the influence of thermal expansion effect on the optical fiber connection; through the setting of the nonlinear angle analysis submodule, the nonlinear correction degree output submodule and the comprehensive angle correction execution submodule, the stress distribution adjustment module can analyze the stress error in real time and output the correction degree, which is conducive to dynamic adjustment through comprehensive correction, thereby improving the stability and accuracy of the optical fiber connection in complex environments.

[0022] 6. Through the setting of the correction angle analysis submodule, the correction angle output submodule and the nonlinear correction module, the optical fiber dynamic correction terminal can accurately analyze the nonlinear effects of thermal expansion and stress distribution, which is conducive to outputting comprehensive correction instructions to drive the position correction submodule to adjust the angle of the optical fiber core, thereby realizing dynamic correction and real-time compensation, which is conducive to improving the environmental adaptability and long-term stability of the multi-core optical fiber connection system.

[0023] 7. By adjusting the setting of the offset value algorithm, the algorithm combines the actual offset of the optical fiber core, the friction correction parameters and the nonlinear compensation model, and can accurately calculate the adjusted offset value of each optical fiber core in the multi-core optical fiber connector, which is beneficial to perform micron-level correction of the optical fiber core position during the plugging and unplugging process, thereby reducing the impact of mechanical errors and plugging and unplugging errors on the optical fiber connection accuracy, which is beneficial to achieve high-precision alignment of multi-core optical fibers and stable optical signal transmission.

[0024] 8. Through the setting of the comprehensive angle correction value algorithm, the algorithm combines the thermal expansion correction value caused by temperature changes and the nonlinear angle correction value caused by stress distribution, and can accurately calculate the dynamic comprehensive correction angle of the optical fiber core, which is conducive to real-time analysis and compensation of the impact of ambient temperature and stress changes on the optical fiber connection angle, thereby ensuring that the multi-core optical fiber maintains alignment accuracy during long-term use, which is conducive to improving the environmental adaptability of the optical fiber connection system and the stability of long-term transmission.

[0025] To further understand the features and technical contents of the present invention, please refer to the following detailed description and drawings of the present invention. However, the drawings provided are only for reference and description and are not intended to limit the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 It is a schematic diagram of the relationship between the optical fiber plug-in terminal, the multi-core optical fiber connector body and the docking seat of the present invention;

[0028] Figure 3 It is a structural schematic diagram of the dynamic adjustment module in the present invention;

[0029] Figure 4 It is a statistical diagram of the adjusted offset values ​​of all optical fiber cores of the multi-core optical fiber in the present invention;

[0030] Figure 5 It is a structural schematic diagram of the thermal expansion correction module in the present invention;

[0031] Figure 6 It is a schematic diagram of the method flow of the efficient plug-in micro-connection method of multi-core optical fibers in the present invention;

[0032] Figure 7 It is a structural schematic diagram of a correction angle output submodule in another embodiment of the present invention;

[0033] Figure 8 It is a statistical schematic diagram of the comprehensive angle correction values ​​of all optical fiber cores of a multi-core optical fiber in another embodiment of the present invention;

[0034] Fig. 9 It is a schematic diagram of the multi-core optical fiber connector body of the present invention. DETAILED DESCRIPTION

[0035] The following is an explanation of the embodiments of the present invention through specific embodiments. Those skilled in the art can understand the advantages and effects of the present invention from the contents disclosed in this specification. The present invention can be implemented or applied through other different specific embodiments, and the details in this specification can also be modified and changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. In addition, the drawings of the present invention are only simple schematic illustrations and are not depicted according to actual dimensions. It is stated in advance. The following embodiments will further explain the relevant technical contents of the present invention in detail, but the disclosed contents are not intended to limit the scope of protection of the present invention.

[0036] Embodiment 1: This embodiment provides a highly efficient pluggable micro-connection structure system for multi-core optical fibers. Figure 1 As shown, a high-efficiency pluggable micro-connection structure system for multi-core optical fibers comprises a multi-core optical fiber connector body, an optical fiber plug-in terminal, an optical fiber alignment auxiliary terminal and an optical fiber dynamic correction terminal; the multi-core optical fiber connector body is used to connect to the optical fiber cores of the multi-core optical fiber; Figure 2 As shown, the optical fiber plugging and unplugging terminal is used to realize the plugging and unplugging operation of the multi-core optical fiber connector body and the docking seat, and at the same time realize the mechanical alignment of the multi-core optical fiber connector body and the docking seat; the optical fiber alignment auxiliary terminal is used to assist the multi-core optical fiber to achieve micron-level alignment during the connection process through positioning and dynamic adjustment; the optical fiber dynamic correction terminal is used to correct the optical fiber connection deviation caused by temperature change, stress, and manufacturing error in real time to maintain the stability of the system;

[0037] The fiber optic plug-in terminal includes a plug-in connection module and a guide locking module; the plug-in connection module is used to complete the mechanical plug-in and pull-out operation of the multi-core fiber optic connector body and the docking seat; the guide locking module is used to guide the multi-core fiber optic connector body during the plug-in and pull-out process and provide a stable mechanical locking function.

[0038] Optionally, the optical fiber alignment auxiliary terminal includes a flexible positioning module, a dynamic adjustment module and an error detection module; Fig. 9 As shown, the flexible positioning module is used to buffer and support the position of the optical fiber core of the multi-core optical fiber in the multi-core optical fiber connector body; the dynamic adjustment module is used to adjust the micron-level position of the optical fiber core in the multi-core optical fiber connector body in real time according to the offset between the optical fiber core and the corresponding optical fiber jack of the docking seat; the error detection module is installed in the docking seat, and is used to detect the alignment error of the optical fiber core during the connection process, and feed back the deviation information to the dynamic adjustment module.

[0039] Optionally, the optical fiber dynamic correction terminal includes a thermal expansion correction module and a stress distribution adjustment module; the thermal expansion correction module is used to adjust in real time the optical fiber connection angle deviation of each optical fiber core caused by temperature changes; the stress distribution adjustment module is used to correct the stress error caused by stress in the connection structure.

[0040] Optional, combined Figure 3 As shown, the dynamic adjustment module includes an error feedback submodule, an adjustment offset value calculation submodule and a position correction submodule; the error feedback submodule is used to read the real-time error feedback of the error detection module; the adjustment offset value calculation submodule is used to calculate the adjustment offset value parameter of each optical fiber core according to the offset of each optical fiber core in the error feedback provided by the error feedback submodule; the position correction submodule is used to adjust the position of the corresponding optical fiber core in the multi-core optical fiber connector body according to the calculation result of the adjustment offset value parameter, so as to complete the micron-level position correction.

[0041] Specifically, when the adjustment offset value calculation submodule works, the following formula is satisfied:

[0042]

[0043] Among them, ΔX represents the adjustment offset value of the corresponding optical fiber core; k represents the adjustment coefficient. The longer the service life of the multi-core optical fiber connector body is, the larger the adjustment coefficient is. The value range is between 1 and 1.5, and the specific value is set by the administrator based on experience; (x1, y1) represents the end face coordinates of the plug-in end of the corresponding optical fiber core in the multi-core optical fiber connector body; (x2, y2) represents the coordinates of the corresponding optical fiber hole of the docking seat; in this embodiment, the multi-core optical fiber connector body is set in a box shape to provide installation space for various positioning structures and sensors, and the coordinate information is obtained by high-precision cameras and image analysis recognition; α represents the friction weight coefficient, which ranges from 0.1 to 0.9. The greater the weight of the position correction submodule in the multi-core optical fiber connector body, the greater the friction weight coefficient is. The specific value is set by the administrator based on experience; the part of the position correction submodule used to adjust the optical fiber core offset can be, but is not limited to: a combination mechanism of a stepper motor and a precision screw. F m It represents the historical maximum static friction force during the matching process between the optical fiber core plug-in end and the optical fiber hole, which is measured through previous measurement experiments; θ represents the small tilt angle when the optical fiber core plug-in end is inserted into the optical fiber hole in the initial state, which is measured using an optical fiber end face tilt angle measuring instrument; K sIt indicates the anti-slip coefficient of the optical fiber material, and its value range is between 2 and 2.5. The thicker the optical fiber core, the greater the anti-slip coefficient. The specific value is set by the administrator based on experience. β indicates the curvature factor, which is generally 0.5. Δd indicates the instantaneous distance between the plug-in end of the optical fiber core and the optical fiber hole during the matching process, that is, at the moment of calculation, the distance between the center of the end face of the plug-in end of the optical fiber core and the center axis of the optical fiber hole is measured by the displacement sensor, which is generally between 2μm and 2.5μm. Since (x1, y1) and (x2, y2) can be directly measured, after calculating the adjustment offset value ΔX of the corresponding optical fiber core, the direction is determined by calculating the coordinate offset vector and its unit vector, and then the micron-level position adjustment is performed based on the adjustment offset value ΔX.

[0044] The following is an implementation example of the calculation process of the adjustment offset value ΔX of the optical fiber core.

[0045] It is known that the end face coordinates of the plug-in end of the optical fiber core during the connection process are (x1, y1) = (5.2, 3.8), and the coordinates of the optical fiber hole corresponding to the docking seat are (x2, y2) = (0.0, 0.0); k = 1.2, F m =0.08N, α=0.85, θ=0.01rad, K s =2.5, Δd=2.3μm, β=0.5, then:

[0046] Coordinate deviation calculation:

[0047] Friction correction term:

[0048] Adjust the offset value ΔX: ΔX = 1.2·6.18 + 0.021 ≈ 7.437 μm;

[0049] The position correction submodule corresponding to the optical fiber core during the plugging and unplugging process will automatically adjust the position of the plugging and unplugging end of the optical fiber core according to the result. Based on the accuracy of the position correction submodule, the number of decimal places of the offset value ΔX can be adjusted. In this embodiment, 7.437μm needs to be changed to 7.4μm to match the accuracy of the position correction submodule.

[0050] Combination Figure 4 As shown, Figure 4 This is a statistical chart of the adjustment offset values ​​of all optical fiber cores of a multi-core optical fiber. The following is a sample program code for calculating the adjustment offset values ​​of the optical fiber cores:

[0051]

[0052] #Calculate friction correction

[0053] friction_correction=(F*math.cos(alpha)) / K_z*(1 / (1+math.exp(-beta*

[0054] delta)))

[0055] #Calculate total adjustment offset

[0056] delta_X=k*coordinate_offset+friction_correction

[0057] return delta_X

[0058] #Example parameters

[0059] x1,x2=5.2,0.0#x-coordinates(μm)

[0060] y1,y2=3.8,0.0#y-coordinates(μm)

[0061] k=1#Constant

[0062] F=0.08#Force in N

[0063] alpha=0.85#Friction coefficient correction factor

[0064] K_z=2.5#Stiffness coefficient

[0065] beta=0.85#Exponential coefficient

[0066] delta=2.3#Offset parameter(μm)

[0067] #Calculate adjustment offset

[0068] adjustment_offset=calculate_adjustment_offset(x1,x2,y1,y2,k,F,alpha,K_z,beta,delta)

[0069] print(f"Adjustment offset(ΔX):{adjustment_offset:.3f}μm").

[0070] Optional, combined Figure 5 As shown, the thermal expansion correction module includes a correction angle analysis submodule and a correction angle output submodule; the correction angle analysis submodule is used to analyze the optical fiber connection angle deviation caused by the thermal expansion effect caused by temperature change; the correction angle output submodule is used to output the corresponding correction angle according to the analysis result of the optical fiber connection angle deviation; the stress distribution adjustment module includes a nonlinear angle analysis submodule, a nonlinear correction degree output submodule and a comprehensive angle correction execution submodule; the nonlinear angle analysis submodule is used to analyze the stress error caused by uneven stress or nonlinear behavior of the material; the nonlinear correction degree output submodule is used to output the nonlinear correction degree according to the analysis result of the stress error; the comprehensive angle correction execution submodule is used to send the corresponding dynamic correction instruction to the position correction submodule according to the correction angle and the nonlinear correction degree; the dynamic correction instruction is used to drive the position correction submodule to adjust the angle of the optical fiber core to complete the dynamic correction.

[0071] The high-efficiency plug-in type micro-connection method of multi-core optical fiber is applied to the high-efficiency plug-in type micro-connection structure system of the multi-core optical fiber as mentioned above, combined with Figure 6 As shown, the efficient plug-in micro-connection method of the multi-core optical fiber includes:

[0072] S1, realizing the plugging and unplugging operation of the multi-core optical fiber connector body and the docking seat, and realizing the mechanical alignment of the multi-core optical fiber connector body and the docking seat;

[0073] S2, through positioning and dynamic adjustment, assists multi-core optical fibers to achieve micron-level alignment during the connection process;

[0074] S3, real-time correction of fiber connection deviation caused by temperature change, stress, and manufacturing error to maintain system stability.

[0075] In summary, by setting up a multi-core fiber optic connector body, a fiber plug-in terminal, a fiber alignment auxiliary terminal and a fiber dynamic correction terminal, the efficient plug-in micro-connection structure system of multi-core optical fibers can achieve full-process optimization from plug-in to long-term stability, which is beneficial to improving the plug-in alignment accuracy and connection stability of the optical fiber core, thereby solving the micron-level offset problem of multi-core optical fibers during connection and use, and improving the use efficiency of multi-core optical fibers; through the setting of a flexible positioning module, a dynamic adjustment module and an error detection module, the fiber alignment auxiliary terminal can be flexible. Positioning buffer and real-time error detection are beneficial to assist the micron-level alignment of the optical fiber core during the plug-in process, thereby Avoid signal loss caused by mechanical errors during fiber plugging and unplugging; through the settings of the thermal expansion correction module and the stress distribution adjustment module, the optical fiber dynamic correction terminal can correct the optical fiber core connection deviation caused by temperature changes and uneven stress distribution in real time, which is conducive to dynamically compensating for the influence of environmental and mechanical factors during the use of optical fibers, thereby maintaining the long-term stability of multi-core optical fiber connections; through the settings of the error feedback submodule, the adjustment offset value calculation submodule and the position correction submodule, the dynamic adjustment module can realize the collection and processing of real-time error feedback, which is conducive to accurately calculating the adjustment offset value parameters of the optical fiber core, and then driving the position correction submodule to complete the optical fiber. micron-level correction of the core; through the setting of the correction angle analysis submodule and the correction angle output submodule, the thermal expansion correction module can output correction instructions according to the angle deviation caused by temperature change, which is conducive to dynamically adjusting the connection angle of the optical fiber core, thereby compensating for the influence of thermal expansion effect on the optical fiber connection; through the setting of the nonlinear angle analysis submodule, the nonlinear correction degree output submodule and the comprehensive angle correction execution submodule, the stress distribution adjustment module can analyze the stress error in real time and output the correction degree, which is conducive to dynamic adjustment through comprehensive correction; through the setting of the correction angle analysis submodule, the correction angle output submodule and the nonlinear correction module, the optical fiber dynamic correction terminal can accurately analyze the nonlinear influence of thermal expansion and stress distribution, which is conducive to outputting comprehensive correction instructions to drive the position correction submodule to adjust the angle of the optical fiber core, thereby realizing dynamic correction and real-time compensation; through the setting of the adjustment offset value algorithm, the algorithm combines the actual offset of the optical fiber core, the friction correction parameter and the nonlinear compensation model, and can accurately calculate the adjustment offset value of each optical fiber core in the multi-core optical fiber connector, which is conducive to micron-level correction of the optical fiber core position during the plugging and unplugging process, thereby reducing the influence of mechanical error and plugging and unplugging error on the optical fiber connection accuracy, thereby facilitating the high-precision alignment of multi-core optical fibers and stable optical signal transmission. Embodiment 2: This embodiment includes all the contents of embodiment 1, and provides a high-efficiency plug-in type micro-connection structure system for multi-core optical fibers, combined with Figure 7As shown, the correction angle output submodule includes a correction angle calculation unit and a correction angle output unit; the correction angle calculation unit is used to calculate the correction angle of the plug-in and unplug end of the optical fiber core according to the analysis results of the optical fiber connection angle deviation; the correction angle output unit is used to output the correction angle.

[0076] After the plug-in end of the optical fiber core is connected to the corresponding optical fiber hole, the correction angle calculation unit starts to work and satisfies the following formula:

[0077]

[0078] Among them, Δθ x Indicates the correction angle of the plug-in end of the corresponding optical fiber core; E represents the material characteristic constant, that is, the elastic modulus of the material, also known as Young's modulus, which is an important physical quantity to measure the material's ability to resist deformation when stretched or compressed. It is obtained by performing a tensile test and calculation on the plug-in end material of the optical fiber core. In this embodiment, E=70Gpa; the part of the position correction submodule that adjusts the plug-in end angle of the optical fiber core can be, but is not limited to, a combination of a dual-axis rotating platform, a three-axis rotating platform, a piezoelectric driver, and a flexible hinge; I represents the moment of inertia, which is generally 0.02; L represents the influence length of the plug-in end of the optical fiber core, which is generally 20mm; k e It represents the dynamic correction coefficient, which ranges from 1 to 1.5 and is generally 1. ΔT represents the temperature change after the plug-in end of the optical fiber core is connected to the corresponding optical fiber hole until the correction angle is calculated.

[0079] The nonlinear correction output submodule includes a nonlinear correction calculation unit and a nonlinear correction output unit; the nonlinear correction calculation unit is used to calculate the nonlinear correction of the plug-in and unplug ends of the optical fiber core according to the analysis results of the stress error; the nonlinear correction output unit is used to output the nonlinear correction.

[0080] The nonlinear correction calculation unit starts working and satisfies the following formula:

[0081]

[0082] Among them, Δθ fIndicates the nonlinear correction degree of the plug-in and unplug-in end of the corresponding optical fiber core; γ indicates the nonlinear correction factor, which ranges from 1 to 1.5. The longer the length of the optical fiber core segment in the multi-core optical fiber connector body, the larger the nonlinear correction factor. The specific value is set by the administrator based on experience. τ indicates the surface stress of the part of the position correction submodule that adjusts the plug-in and unplug-in end angle of the optical fiber core, that is, the ratio of the shear force on the plug-in and unplug-in end of the optical fiber core to the force-bearing area during the adjustment process, which is obtained through stress sensors and calculations. The shear force on the plug-in and unplug-in end of the optical fiber core indicates the shear force applied to the surface of the optical fiber core by the position correction submodule during the adjustment process; ΔT indicates the temperature change after the plug-in and unplug-in end of the optical fiber core is connected to the corresponding optical fiber hole until the calculation of the nonlinear correction degree begins; μ s represents the sliding friction coefficient of the plug-in end of the optical fiber core at the optical fiber hole. In this embodiment, μ s =0.05; φ represents the deformation angle of the portion of the position correction submodule that adjusts the angle of the plug-in and unplug-out ends of the optical fiber core, which is measured by an angle sensor.

[0083] The comprehensive angle correction execution submodule includes a comprehensive angle correction value calculation unit and a dynamic correction instruction generation unit; the comprehensive angle correction value calculation unit is used to calculate the comprehensive angle correction value according to the correction angle and the nonlinear correction degree; the dynamic correction instruction generation unit is used to generate and send the corresponding dynamic correction instruction to the position correction submodule according to the comprehensive angle correction value.

[0084] When the comprehensive angle correction value calculation unit is working, the following formula is satisfied:

[0085] Δθ Z =Δθ X +Δθ f ;

[0086] Wherein, ΔθZ represents the comprehensive angle correction value of the plug-in and unplug-out ends of the corresponding optical fiber core; the following is an implementation example of the calculation process of the comprehensive angle correction value of the optical fiber core.

[0087] It is known that after the connection is completed, E = 70Gpa, I = 0.02, ΔT = 5°C, γ = 1.1, τ = 15Mpa, μ s =0.05,

[0088] φ=0.03rad、L=20mm、k e =1, then:

[0089]

[0090] Δθ Z =Δθ X +Δθ f =36.5+590=626.5μrad;

[0091] After calculating the comprehensive angle correction value, the rotation axis is determined according to the offset vector between the actual position of the plug-in and unplug-out end of the optical fiber core and the target position, thereby driving the position correction submodule to complete the corresponding adjustment; in this embodiment, in order to meet the accuracy requirements of the adjustment, a piezoelectric driver is preferably used as a small angle adjustment mechanism.

[0092] Combination Figure 8 As shown, Figure 8 The following is a statistical diagram of the comprehensive angle correction values ​​of all optical fiber cores of a multi-core optical fiber. The following is a sample program code for calculating the comprehensive angle correction values ​​of the optical fiber cores:

[0093]

[0094]

[0095]

[0096] In summary, through the setting of the comprehensive angle correction algorithm, the algorithm combines the thermal expansion correction value caused by temperature changes and the nonlinear angle correction value caused by stress distribution, and can accurately calculate the dynamic comprehensive correction angle of the optical fiber core, which is conducive to real-time analysis and compensation of the influence of ambient temperature and stress changes on the optical fiber connection angle, thereby ensuring that the multi-core optical fiber maintains alignment accuracy during long-term use, which is conducive to improving the environmental adaptability of the optical fiber connection system and the stability of long-term transmission.

[0097] The contents disclosed above are only preferred feasible embodiments of the present invention, and do not limit the protection scope of the present invention. Therefore, all equivalent technical changes made using the contents of the present invention description and drawings are included in the protection scope of the present invention. In addition, the elements therein can be updated as technology develops.

Claims

1. An efficient plug-in micro-connection structure system for multi-core optical fibers, characterized in that: It includes a multi-core optical fiber connector body, an optical fiber plug-in terminal, an optical fiber alignment auxiliary terminal and an optical fiber dynamic correction terminal; the multi-core optical fiber connector body is used to connect with the optical fiber core of the multi-core optical fiber; the optical fiber plug-in terminal is used to realize the plug-in and pull-out operation of the multi-core optical fiber connector body and the docking seat, and realize the mechanical alignment of the multi-core optical fiber connector body and the docking seat; the optical fiber alignment auxiliary terminal is used to assist the multi-core optical fiber to achieve micron-level alignment during the connection process through positioning and dynamic adjustment; the optical fiber dynamic correction terminal is used to correct the optical fiber connection deviation caused by temperature change, stress, and manufacturing error in real time to maintain the stability of the system; The fiber optic plug-in terminal includes a plug-in connection module and a guide locking module; the plug-in connection module is used to complete the mechanical plug-in and pull-out operation of the multi-core fiber optic connector body and the docking seat; the guide locking module is used to guide the multi-core fiber optic connector body during the plug-in and pull-out process and provide a stable mechanical locking function.

2. The high-efficiency pluggable micro-connection structure system for multi-core optical fibers according to claim 1, characterized in that: The optical fiber alignment auxiliary terminal includes a flexible positioning module, a dynamic adjustment module and an error detection module; the flexible positioning module is installed in the multi-core optical fiber connector body, and is used to buffer and support the position of the optical fiber core of the multi-core optical fiber through a flexible positioning spring; the dynamic adjustment module is installed in the multi-core optical fiber connector body, and is used to adjust the micron-level position of the optical fiber core in the multi-core optical fiber connector body in real time according to the offset between the optical fiber core and the corresponding optical fiber jack of the docking seat; the error detection module is installed in the docking seat, and is used to detect the alignment error of the optical fiber core during the connection process, and feed back the deviation information to the dynamic adjustment module.

3. The high-efficiency pluggable micro-connection structure system of multi-core optical fiber according to claim 2, characterized in that: The optical fiber dynamic correction terminal includes a thermal expansion correction module and a stress distribution adjustment module; the thermal expansion correction module is used to adjust the optical fiber connection angle deviation of each optical fiber core caused by temperature change in real time; the stress distribution adjustment module is used to correct the stress error caused by stress in the connection structure.

4. The high-efficiency pluggable micro-connection structure system for multi-core optical fibers according to claim 3, characterized in that: The dynamic adjustment module includes an error feedback submodule, an adjustment offset value calculation submodule and a position correction submodule; The error feedback submodule is used to read the real-time error feedback of the error detection module; The adjustment offset value calculation submodule is used to calculate the adjustment offset value parameter of each optical fiber core according to the offset of each optical fiber core in the error feedback provided by the error feedback submodule; The position correction submodule is used to adjust the position of the corresponding optical fiber core in the multi-core optical fiber connector body according to the calculation result of the adjustment offset value parameter, so as to complete the micron-level position correction.

5. The high-efficiency pluggable micro-connection structure system of multi-core optical fiber according to claim 4, characterized in that: The thermal expansion correction module includes a correction angle analysis submodule and a correction angle output submodule; the correction angle analysis submodule is used to analyze the optical fiber connection angle deviation caused by the thermal expansion effect caused by temperature change; the correction angle output submodule is used to output the corresponding correction angle according to the analysis result of the optical fiber connection angle deviation; The stress distribution adjustment module includes a nonlinear angle analysis submodule, a nonlinear correction output submodule and a comprehensive angle correction execution submodule; the nonlinear angle analysis submodule is used to analyze stress errors caused by uneven stress or nonlinear behavior of materials; The nonlinear correction output submodule is used to output the nonlinear correction according to the analysis result of the stress error; The comprehensive angle correction execution submodule is used to send corresponding dynamic correction instructions to the position correction submodule according to the correction angle and the nonlinear correction degree; The dynamic correction instruction is used to drive the position correction submodule to adjust the angle of the optical fiber core to complete the dynamic correction.

6. An efficient plug-in micro-connection method for multi-core optical fibers, applied to an efficient plug-in micro-connection structure system for multi-core optical fibers as claimed in any one of claims 1 to 5, characterized in that: The efficient plug-in micro-connection method for multi-core optical fibers comprises: S1, realizing the plugging and unplugging operation of the multi-core optical fiber connector body and the docking seat, and realizing the mechanical alignment of the multi-core optical fiber connector body and the docking seat; S2, through positioning and dynamic adjustment, assists multi-core optical fibers to achieve micron-level alignment during the connection process; S3, real-time correction of fiber connection deviation caused by temperature change, stress, and manufacturing error to maintain system stability.

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