All-fiber output stable performance interference module integration method

Abstract

The invention relates to the technical field of optical fiber interference, and discloses an all-optical fiber output stable performance interference module integration method, which comprises the following steps of S1, designing an all-optical fiber module structure, optimizing an optical fiber connection mode, and reducing optical path loss and fluctuation; s2, selecting an optical fiber material, ensuring high refractive index stability, low dispersion and low loss of the optical fiber material, and ensuring stable signal transmission; s3, light beam input and output stability is controlled, a precise light beam alignment and adjustment mechanism is adopted, and stable light beam transmission is ensured; and S4, carrying out assembly, debugging and performance evaluation on the module to ensure accurate matching of the components, and verifying the stability through a test. Through all-fiber design and an accurate fiber connection mode, stability and high efficiency of optical signal transmission are achieved, and compared with complex fiber and metal connection points and easy generation of reflection and signal loss in the prior art, the design of the invention reduces connection nodes and fiber bending, and effectively reduces signal attenuation and fluctuation.

Description

Technical Field

[0001] The present invention relates to the field of optical fiber interference technology, and in particular to an interference module integration method with all-optical fiber output stability performance. Background Art

[0002] In the field of fiber optic interferometry, traditional fiber optic module designs usually use the connection method of optical fiber and metal or other non-fiber optic materials. These modules are widely used in optical communications, sensing, and optical measurement. Generally speaking, existing fiber optic interferometry modules can meet basic signal transmission needs through standard optical fiber materials combined with common beam alignment technology. Many modules use manual adjustment of beams and optical fibers to achieve signal input and output. In addition, these modules often use traditional fiber optic connectors and relatively simple optical testing methods in production to ensure the basic functions of the modules.

[0003] However, with the growing demand for high-precision, high-stability fiber optic interference modules, the performance limitations of existing technologies have gradually become apparent. Existing fiber optic connection methods often rely on metal or other non-fiber optic connection materials, which to a certain extent leads to signal loss and reflection, affecting the stability and transmission accuracy of the module. In addition, existing materials often lack sufficient environmental adaptability, which can easily lead to unstable fiber performance in environments with large changes in temperature and humidity. Traditional beam input and output adjustment technologies also have the problem of insufficient accuracy, often relying on manual adjustment or low-precision automatic control, which can easily cause beam deviation or vibration, thereby affecting the quality of the interference signal. During the assembly and testing of fiber optic modules, due to the lack of long-term environmental adaptability verification, the modules often show performance degradation in actual applications and cannot meet the long-term stability requirements of high-precision applications. These problems limit the application of existing technologies in some high-precision fields. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides an interference module integration method with all-fiber output stability performance, which solves the deficiencies in signal stability, environmental adaptability and long-term reliability of the existing fiber interference modules.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: A method for integrating interference modules with all-fiber output stability performance, comprising the following steps: S1. Design a fully optical fiber module structure to reduce the loss and fluctuation in the optical path by optimizing the optical fiber connection method, arrangement and precise docking of connectors; S2. Select optical fiber materials to ensure that they have high refractive index stability, low dispersion and low loss to ensure the transmission stability of optical signals; S3. Control the stability of the beam input and output, and use high-precision beam alignment and adjustment mechanisms to ensure that the beam stably enters and outputs the optical fiber module to avoid interference signal fluctuations caused by vibration and offset; S4. Assemble, debug and evaluate the performance of the module to ensure the precise fit of all components and the stability of the system. Optimize the optical path through optical testing and conduct long-term stability testing to verify the performance of the module under different environmental conditions.

[0006] Preferably, in the step S1, the all-fiber module structure reduces the loss in the optical path and optimizes the number of connection points and the bending radius of the fiber connection through precise fiber arrangement and connection method.

[0007] Preferably, in step S2, the refractive index of the optical fiber material is between 1.45 and 1.46, the loss coefficient is less than 0.2 dB / km, and the dispersion coefficient is between 0.1 ps / nm·km and 0.5 ps / nm·km.

[0008] Preferably, in the step S3, the light beam input and output control adjusts the polarization state of the light beam through a polarization controller to ensure stable transmission of the light beam and avoid signal fluctuations caused by unstable polarization.

[0009] Preferably, in step S3, the module structure design includes optimizing the connection mode between the optical fiber and the interference module, the accuracy of the optical fiber interface is not less than 0.1 mm, and the connection error does not exceed 1 μm.

[0010] Preferably, in the step S3, the light beam alignment and adjustment mechanism adjusts the incident angle and alignment accuracy of the light beam through a precise electric adjustment device to ensure that the light beam is transmitted along the most stable path.

[0011] Preferably, in the step S4, the debugging process includes debugging the module using optical testing equipment to optimize the input and output angles and polarization angles of the light beams in the optical path to ensure the best interference effect.

[0012] Preferably, in the step S4, when assembling the modules, the installation accuracy of all optical fiber components and beam control devices is required to be within 0.1 mm to ensure precise matching of the components.

[0013] Preferably, in step S4, the long-term stability test simulates different environmental conditions, including changes in temperature and humidity, and performs a continuous operation test on the module for at least 48 hours to ensure that it can still operate stably under changing environmental conditions.

[0014] Preferably, in the step S4, the performance evaluation includes testing the stability of the module under high-frequency signal transmission to ensure that it can continuously and stably output in high-precision applications.

[0015] The present invention provides an interference module integration method with all-fiber output stability performance. It has the following beneficial effects: 1. The present invention adopts a full-fiber design and precise fiber connection method to achieve stability and high efficiency in optical signal transmission. Compared with the complex fiber and metal connection points in the prior art, which are prone to reflection and signal loss, the design of the present invention reduces connection nodes and fiber bending, effectively reducing signal attenuation and fluctuation.

[0016] 2. The present invention adopts optical fiber materials with high refractive index stability, low dispersion and low loss to ensure the stable transmission of optical signals under different environmental conditions. Compared with the optical fiber materials in the prior art which have large limitations in material selection and are easily affected by the environment, the optical fiber materials of the present invention can effectively reduce the interference of temperature changes and humidity on the signal, thereby improving the reliability of the system.

[0017] 3. The present invention achieves stable light beam transmission through precise light beam input and output control and polarization adjustment, avoiding the influence of external vibration and offset on the interference signal. Compared with the signal fluctuation problem caused by inaccurate light beam alignment or unstable polarization in traditional technology, the present invention has significant advantages in improving signal stability and interference accuracy.

[0018] 4. The present invention ensures the high stability and long-term reliable operation of the module through strict module assembly, optical path debugging and long-term stability testing. In the prior art, due to the lack of complete system testing and environmental adaptability verification, the module often has performance degradation problems during long-term operation. The present invention effectively solves this problem and ensures stability in various complex environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The figure is a flow chart of the method steps of the present invention. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the specification of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Please see attached Figure 1 The embodiment of the present invention provides an interference module integration method for all-fiber output stability performance, comprising the following steps: S1. Design a fully optical fiber module structure to reduce the loss and fluctuation in the optical path by optimizing the optical fiber connection method, arrangement and precise docking of connectors; S2. Select optical fiber materials to ensure that they have high refractive index stability, low dispersion and low loss to ensure the transmission stability of optical signals; S3. Control the stability of the beam input and output, and use high-precision beam alignment and adjustment mechanisms to ensure that the beam stably enters and outputs the optical fiber module to avoid interference signal fluctuations caused by vibration and offset; S4. Assemble, debug and evaluate the performance of the module to ensure the precise fit of all components and the stability of the system. Optimize the optical path through optical testing and conduct long-term stability testing to verify the performance of the module under different environmental conditions.

[0022] Specifically, in step S1 of this embodiment, the design of the all-fiber module structure is achieved in the following ways: First, by precisely arranging the optical fiber components, ensure that the optical fiber path is as short as possible and has no unnecessary bends or connection points. This design principle helps to reduce the loss in the optical path and ensure the stable transmission of the optical signal. Specifically, the number of optical fiber connection points should be reduced as much as possible, and the bending radius of the optical fiber connection is required to meet the requirements of optical fiber transmission. The bending of the optical fiber will cause the attenuation of the optical signal. Therefore, it is necessary to ensure that when designing the optical fiber path, the bending radius is not less than the minimum bending radius of the optical fiber to avoid excessive attenuation of the signal.

[0023] In one possible implementation, the optical fiber is connected through a high-precision optical fiber connector, and the error of each connection point should be strictly controlled within 1μm. This is because a small connection error may cause the optical signal to reflect or attenuate, thereby affecting the performance of the entire interference module. Through high-precision connectors, the stable connection of optical fiber components can be ensured, reducing the loss of optical signals.

[0024] As an option, the fiber layout design should fully consider the rational use of the module's internal space to avoid overly complex cross-connections or unnecessary fiber redundancy. The fiber path design needs to be compact and efficient to ensure that the signal transmission path from the input end to the output end is the shortest and most stable. Especially when the signal is transmitted through multiple fiber optic components, the stability of each connection may have a significant impact on the quality of the signal. Therefore, optimizing the connection method and reducing unnecessary connection nodes are the key to improving system stability.

[0025] In some embodiments, the design may also involve analysis of optical reflection and loss of optical fibers. Using the reflection loss that may occur in optical fiber connections, the loss model of the optical path can be further derived. In these models, the loss L of the optical fiber path can usually be calculated using the following formula: Where L is the optical path loss, P in is the optical power at the input end, P outis the optical power at the output end. By optimizing the optical fiber path design, P out With P in The gap between them can reduce loss and improve signal stability.

[0026] When designing the module structure, special attention should be paid to the connection between the optical fiber interface and other components. The interface design should ensure that the contact surface between the optical fiber and other components in the module is flat and stable, and can withstand the temperature and mechanical stress of normal operation to avoid instability of the optical signal during transmission. The matching accuracy of the optical fiber interface should not be less than 0.1mm, and the error of the interface connection should not exceed 1μm to ensure interference-free signal transmission.

[0027] In general, the fiber layout design should follow standard optical design principles, and the location and path of the fiber should be designed to minimize beam deviation and interference. When implementing a full fiber design, it is necessary to balance the signal stability and the compactness of the module structure according to actual application requirements.

[0028] In addition, the optimal design of the module structure not only depends on the precise arrangement of the optical fiber, but also includes the consideration of the adaptability of the optical fiber components in the module and the external environment. In the design process of the module, the influence of external factors such as ambient temperature and humidity on the performance of the optical fiber must be considered. Therefore, adding appropriate temperature control devices or protective designs to the module structure is an effective means to maintain the stability of the optical fiber.

[0029] In step S2 of this embodiment, the selection of optical fiber materials first requires that the optical fiber has high refractive index stability, which can ensure that the change of refractive index under different environmental conditions is minimal. Secondly, the material should have low dispersion, that is, optical signals of different wavelengths maintain a consistent propagation speed during transmission, thereby reducing signal distortion caused by dispersion. Finally, the optical fiber material should have low loss characteristics to reduce the loss of signals caused by the attenuation of the optical fiber itself during transmission.

[0030] Specifically, when selecting optical fiber materials, the material used in the present invention is mainly quartz optical fiber, which has good optical properties, especially in high-precision, long-distance optical signal transmission. The refractive index of quartz optical fiber is usually between 1.45 and 1.46, which ensures good light conductivity during signal transmission. Within this refractive index range, quartz optical fiber can ensure stable propagation of optical signals and effectively avoid signal fluctuations caused by unstable refractive index.

[0031] As an option, the loss coefficient of the optical fiber material should not be greater than 0.2dB / km to ensure that the signal transmission in the optical fiber will not be excessively attenuated. The value of the loss coefficient is based on many years of research and experimental results, aiming to ensure that in practical applications, the transmission of optical signals can meet the standards of long-term and high stability. In some embodiments, the optical fiber loss coefficient used can be even further reduced to meet more stringent application requirements.

[0032] In addition, the dispersion coefficient is another key parameter. In the present invention, the dispersion coefficient of the selected optical fiber material is usually 0.1ps / nm·km~0.5ps / nm·km, which ensures that the relative propagation speed difference between wavelengths during signal transmission is minimal and can effectively reduce signal distortion caused by dispersion. Controlling within this range can not only improve transmission accuracy, but also maintain efficient operation of the interference module.

[0033] In one possible implementation, in order to further optimize the performance of the optical fiber, the present invention also considers the temperature stability of the optical fiber. In some embodiments, the temperature change of the selected material has a minimal effect on the refractive index of the optical fiber, which helps to ensure that the module can still work stably in an environment with large temperature changes. This temperature adaptability is an important characteristic that optical fibers must have in practical applications, especially in environments with large temperature fluctuations.

[0034] In general, the use of optical fiber materials with high refractive index stability, low dispersion and low loss can effectively reduce transmission loss, enhance signal stability, and significantly improve the overall performance of the interference module. The selection of optical fiber materials has a significant impact on the accuracy, reliability and long-term stability of the module. In this embodiment, by strictly selecting optical fiber materials that meet these characteristics, it is ensured that the module involved in the present invention can work stably under various conditions and meet the requirements of high-precision applications.

[0035] Furthermore, the quality control of optical fiber is also very important. Selecting the right optical fiber supplier and strict production process ensures that the optical fiber used is strictly controlled during the production process to avoid defects or flaws in the optical fiber material, so as to ensure that the performance of the material fully meets the design requirements. High quality standards can not only ensure the stability of the signal, but also effectively avoid problems such as optical signal attenuation and reflection caused by material defects.

[0036] In step S3 of this embodiment, the input and output stability of the light beam is achieved through precise light beam alignment and adjustment mechanisms. These mechanisms can ensure that the light beam is transmitted at the optimal angle and state when entering and exiting the optical fiber module, thereby ensuring the integrity of the signal. Specifically, the polarization controller is an important tool for controlling the stability of the light beam. The polarization controller adjusts the polarization direction of the light beam to ensure that the light beam remains stable during transmission and avoids interference signal fluctuations caused by polarization instability.

[0037] As an option, the role of the polarization controller is not only to adjust the direction of the light beam, but also to fine-tune the phase of the light beam. Through precise phase adjustment, the interference effect between multiple light beams can be ensured to reach the optimal state, thereby enhancing the accuracy and stability of the system. In some embodiments, an electro-optic modulator is used to adjust the polarization state to make it more refined to adapt to more complex application scenarios.

[0038] In general, in order to further reduce the impact of external factors (such as vibration and temperature changes) on the light beam, the stability control of the light beam input and output also needs to be achieved through a precise mechanical structure. Usually, a precise electric adjustment device can dynamically adjust the incident angle and alignment accuracy of the light beam. Through these adjustment devices, the light beam can always be transmitted along the most stable path. The electric adjustment device continuously adjusts the position of the light beam through real-time feedback signals to ensure the accuracy of the light beam input and output.

[0039] Specifically, the beam alignment and adjustment mechanism have high precision requirements. In practical applications, the interface between the beam and the optical fiber must be very precisely connected, and the error of the interface must not exceed 0.1mm. The precision requirements for the optical fiber connection part are also relatively strict, and the connection error is usually controlled within 1μm. These precision requirements can ensure that the beam and the optical fiber are not offset, thereby ensuring that the optical signal can be transmitted stably.

[0040] In one possible implementation, the stability control of the beam input and output may involve multi-dimensional adjustments. For example, in addition to adjusting the angle of the beam, it may also be necessary to adjust the intensity and direction of the beam to ensure stable transmission of the optical signal throughout the optical path. In this case, the control device used needs to consider not only the adjustment of the physical position, but also the energy distribution of the beam to optimize the performance of the interference module.

[0041] In some embodiments, the stability control of the beam input and output may also be further optimized through an optical feedback system. The optical feedback system can detect the state of the beam in real time. If the beam deviates, the system will automatically adjust to ensure that the beam re-enters the fiber module. Such feedback mechanisms can effectively avoid beam deviation caused by improper manual adjustment, further improving the automation level and accuracy of the system.

[0042] In step S4 of this embodiment, the assembly of the module first involves the precise installation of each fiber optic component, beam control device and other related electronic equipment. In this process, it is extremely important to ensure the installation accuracy of all components. Generally, the installation error of the fiber optic component and the beam control device shall not exceed 0.1mm to ensure the stability of the fiber optic path and accurate beam calibration. For each fiber optic connection point, the error is strictly controlled within 1μm. In this way, signal loss and instability caused by poor connection or slight deviation can be avoided.

[0043] Specifically, during the assembly process, special attention should be paid to the connection of optical fibers and other optical components. The installation of all connection points must be precisely debugged to ensure that there is no poor contact or asymmetry. The contact surface of each connection part should be kept flat to avoid optical loss caused by poor contact. In order to further improve the stability of the connection, high-precision fiber optic connectors are used to ensure the stable fixation of the optical fiber in the module.

[0044] As an option, during the module debugging phase, the optical path is carefully adjusted using optical test equipment. For example, the intensity and wavelength of the light beam are monitored in real time using a power meter and a spectrometer to ensure that the optical signal output by the module reaches the required power level and wavelength range. A key step in debugging is to optimize the input and output angles and polarization angles of the light beam to ensure that the light beam is transmitted along the most stable path and is not disturbed by the external environment.

[0045] In some embodiments, the debugging of the optical path also includes fine-tuning the refraction angle, incident angle, and propagation path of the optical fiber. These adjustment steps ensure that the propagation of the optical signal from the input end to the output end does not deviate and avoid signal distortion. During the debugging process, the system will adjust various parameters in real time through the feedback mechanism to ensure that the module can operate stably under various working conditions.

[0046] After the module is assembled and debugged, performance evaluation is a key step to verify whether the module meets the design requirements. Performance evaluation includes testing the stability of the module under different environmental conditions, especially its performance under high-frequency signal transmission. Specifically, the evaluation includes long-term operation test, temperature and humidity change test, and light beam interference stability test.

[0047] As an option, in the long-term stability test, the module is usually tested for at least 48 hours of continuous operation in a simulated environment. This test process ensures the stability of the module in long-term use and verifies its adaptability to different temperature and humidity conditions. During the test, the fluctuation amplitude of the optical signal should be kept within 1% to ensure the high-precision output of the system.

[0048] In some embodiments, the performance evaluation also includes verifying the advantages of the present invention by comparing the performance of different modules. By comparing with traditional fiber interference modules, the advantages of the present invention in reducing signal loss and improving optical signal stability are verified. These test results can effectively support the technical advantages of the present invention and ensure its reliability in practical applications.

[0049] In step S1, the all-fiber module structure reduces the loss in the optical path and optimizes the number of connection points and the bending radius of the fiber connection through precise fiber arrangement and connection. In step S2, the refractive index of the fiber material is between 1.45 and 1.46, the loss coefficient is less than 0.2dB / km, and the dispersion coefficient is between 0.1ps / nm·km and 0.5ps / nm·km. In step S3, the beam input and output control adjusts the polarization state of the beam through a polarization controller to ensure stable transmission of the beam and avoid signal fluctuations caused by unstable polarization. In step S3, the module structure design includes optimizing the connection method between the optical fiber and the interference module. The accuracy of the fiber interface is not less than 0.1mm, and the connection error does not exceed 1μm. In step S3, the beam alignment and adjustment mechanism is controlled by precise electrical The dynamic adjustment device adjusts the incident angle and alignment accuracy of the light beam to ensure that the light beam is transmitted along the most stable path. Step S4: The debugging process includes using optical testing equipment to debug the module and optimize the input and output angles and polarization angles of the light beam in the optical path to ensure the best interference effect. Step S4: When assembling the module, the installation accuracy of all optical fiber components and beam control devices must be within 0.1mm to ensure precise matching of the components. Step S4: Long-term stability test simulates different environmental conditions, including changes in temperature and humidity, and conducts continuous operation tests on the module for at least 48 hours to ensure that it can still operate stably under changing environmental conditions. Step S4: Performance evaluation includes stability testing of the module under high-frequency signal transmission to ensure that it can continuously and stably output in high-precision applications.

[0050] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for integrating interference modules with all-fiber output stability performance, characterized in that: The following steps are involved: S1. Design a fully optical fiber module structure to reduce the loss and fluctuation in the optical path by optimizing the optical fiber connection method, arrangement and precise docking of connectors; S2. Select optical fiber materials to ensure that they have high refractive index stability, low dispersion and low loss to ensure the transmission stability of optical signals; S3. Control the stability of the beam input and output, and use high-precision beam alignment and adjustment mechanisms to ensure that the beam stably enters and outputs the optical fiber module to avoid interference signal fluctuations caused by vibration and offset; S4. Assemble, debug and evaluate the performance of the module to ensure the precise fit of all components and the stability of the system. Optimize the optical path through optical testing and conduct long-term stability testing to verify the performance of the module under different environmental conditions.

2. The interference module integration method for all-fiber output stability performance according to claim 1, characterized in that: In the step S1, the all-fiber module structure reduces the loss in the optical path and optimizes the number of connection points and the bending radius of the fiber connection through precise fiber arrangement and connection method.

3. The interference module integration method for all-fiber output stability performance according to claim 1, characterized in that: In the step S2, the refractive index of the optical fiber material is between 1.45 and 1.46, the loss coefficient is less than 0.2 dB / km, and the dispersion coefficient is between 0.1 ps / nm·km and 0.5 ps / nm·km.

4. The interference module integration method for all-fiber output stability performance according to claim 1, characterized in that: In the step S3, the beam input and output control adjusts the polarization state of the beam through a polarization controller to ensure stable transmission of the beam and avoid signal fluctuations caused by unstable polarization.

5. The interference module integration method for all-fiber output stability performance according to claim 1, characterized in that: In the step S3, the module structure design includes optimizing the connection method between the optical fiber and the interference module, the accuracy of the optical fiber interface is not less than 0.1 mm, and the connection error does not exceed 1 μm.

6. The interference module integration method for all-fiber output stability performance according to claim 1, characterized in that: In the step S3, the beam alignment and adjustment mechanism adjusts the incident angle and alignment accuracy of the beam through a precise electric adjustment device to ensure that the beam is transmitted along the most stable path.

7. The interference module integration method for all-fiber output stability performance according to claim 1, characterized in that: In the step S4, the debugging process includes debugging the module using optical testing equipment to optimize the input and output angles and polarization angles of the light beams in the optical path to ensure the best interference effect.

8. The interference module integration method for all-fiber output stability performance according to claim 1, characterized in that: In the above-mentioned step S4, when assembling the module, the installation accuracy of all optical fiber components and beam control devices is required to be within 0.1 mm to ensure the precise matching of the components.

9. The interference module integration method for all-fiber output stability performance according to claim 1, characterized in that: In the S4 step, the long-term stability test simulates different environmental conditions, including changes in temperature and humidity, and performs a continuous operation test on the module for at least 48 hours to ensure that it can still operate stably under changing environmental conditions.

10. The interference module integration method for all-fiber output stability performance according to claim 1, characterized in that: In the S4 step, the performance evaluation includes testing the stability of the module under high-frequency signal transmission to ensure that it can continuously and stably output in high-precision applications.

Images