Optoisolator coupling control method and system for keeping light polarization state stable

Abstract

The invention relates to the technical field of optics, and provides an optical isolator coupling control method and system for keeping the light polarization state stable. The method comprises the steps that light polarization states are classified according to light polarization inducements, and polarization categories are divided; according to the polarization type, a modulation decision module is built, and the output end of the modulation decision module is in communication connection with an electro-optical modulator; and the control module is used for identifying a light scene, triggering the detection equipment group, detecting the operation process of the optoisolator, judging whether to activate the modulation decision module or not according to a triggering condition, determining a polarization modulation strategy, and responding to the electro-optical modulator to carry out light modulation driving control. The technical problem that the isolation performance of the optical isolator is reduced due to the fact that the light polarization state is prone to instability in a dynamic environment is solved, and the technical effect of achieving high-precision, real-time and stable optical isolation control through self-adaptive polarization modulation is achieved.

Description

Technical Field

[0001] This application relates to the field of optical technology, specifically to a method and system for controlling the coupling of an optical isolator to maintain a stable optical polarization state. Background Technology

[0002] With the rapid development of optical communication technology, the requirements for optical signal transmission quality and system stability are becoming increasingly stringent. Optical isolators, as key components ensuring unidirectional optical transmission, directly impact the reliability of the entire optical system. Traditional optical isolators face significant challenges in complex application scenarios: when the optical path traverses a mechanically vibrating environment, the micro-displacement of optical components caused by vibration leads to uncontrollable polarization axis shifts; in operating scenarios with severe temperature fluctuations, the birefringence effect caused by thermal expansion and contraction of optical materials disrupts the uniformity of polarization states; and in high-speed optical modulation applications, polarization disturbances caused by transient electro-optic effects directly lead to signal distortion. However, existing optical isolators mostly employ static compensation structures or open-loop control methods, making it difficult to track polarization disturbance characteristics in complex environments in real time. Especially under multi-physics coupling, they lack differentiated response mechanisms for polarization axis shifts caused by mechanical vibrations, birefringence effects caused by temperature gradients, and transient modulation interference, resulting in limited system stability. Summary of the Invention

[0003] This application provides a method and system for controlling the coupling of an optical isolator to maintain a stable optical polarization state, aiming to solve the technical problem that the optical polarization state is prone to instability in dynamic environments, leading to a decrease in the isolation performance of the optical isolator.

[0004] The first aspect disclosed in this application provides a coupling control method for an optical isolator to maintain a stable optical polarization state. The method includes: classifying the optical polarization state based on optical polarization causes and dividing it into polarization categories; constructing a modulation decision module according to the polarization categories, wherein the output of the modulation decision module is communicatively connected to an electro-optic modulator; identifying an optical scene and triggering a detection device group to detect the operation process of the optical isolator; determining whether to activate the modulation decision module according to the triggering conditions; determining a polarization modulation strategy; and performing optical modulation drive control in response to the electro-optic modulator.

[0005] Another aspect of this application discloses an optical isolator coupling control system for maintaining stable optical polarization states. The system includes: a polarization classification unit for classifying optical polarization states based on optical polarization causes and dividing them into polarization categories; a modulation decision module construction unit for constructing a modulation decision module based on the polarization categories, wherein the output of the modulation decision module is communicatively connected to an electro-optic modulator; and an optical modulation drive control unit for identifying the optical scene and triggering a detection device group to detect the operation progress of the optical isolator, determining whether to activate the modulation decision module based on triggering conditions, determining a polarization modulation strategy, and responding to the electro-optic modulator to perform optical modulation drive control.

[0006] One or more technical solutions provided in this application have at least the following technical effects or advantages: The aforementioned optical isolator coupling control method for maintaining stable optical polarization states analyzes the causes of optical polarization and categorizes optical polarization states into different types. Then, based on these categories, a modulation decision module is established, whose output is connected to an electro-optic modulator. Next, the operation of the optical isolator is monitored by identifying the current optical scene and triggering corresponding detection devices to determine whether the modulation decision module needs to be activated. Then, based on the detected triggering conditions, it is decided whether to initiate a polarization modulation strategy and adjust the polarization state of the optical signal through the electro-optic modulator, thereby achieving stable control of the optical polarization state.

[0007] The above description is merely an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, specific embodiments of this application are given below. Attached Figure Description

[0008] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying 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.

[0009] Figure 1 This is a flowchart illustrating an optical isolator coupling control method for maintaining stable optical polarization state in one embodiment.

[0010] Figure 2 This is a schematic diagram of an optical isolator coupling control system architecture used to maintain stable optical polarization state in one embodiment.

[0011] Figure labeling: Polarization classification unit 11, modulation decision module construction unit 12, optical modulation drive control unit 13. Detailed Implementation

[0012] This application provides a method and system for controlling the coupling of an optical isolator to maintain a stable optical polarization state, thereby solving the technical problem that the optical polarization state is prone to instability in dynamic environments, leading to a decrease in the isolation performance of the optical isolator.

[0013] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0014] It should be noted that the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or server that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or modules that are not explicitly listed or that are inherent to such process, method, product, or device.

[0015] Example 1, as Figure 1 As shown, this application provides a method for controlling the coupling of an optical isolator to maintain a stable optical polarization state, the method comprising: Based on the causes of light polarization, the polarization state is classified and polarization categories are defined.

[0016] In this embodiment, the optical polarization state is categorized by identifying different causes of optical polarization. These causes may include factors such as mechanical vibration, temperature changes, or high-speed modulation, each affecting the polarization state of light in different ways. Specifically, mechanical vibration may cause a shift in the polarization axis of light, affecting the propagation direction and intensity of light, thus impacting the performance of the optical isolator. Temperature changes may cause birefringence, leading to changes in the polarization state of light, especially when the material undergoes thermal expansion and refractive index changes, potentially disrupting the stability of the polarization state. High-speed modulation may subject the polarization state of the optical signal to transient disturbances, typically occurring under high-frequency operation, where the polarization state may change drastically within a short period. By analyzing the causes of the polarization, the optical polarization state is classified into different polarization categories, such as the first polarization category corresponding to mechanical vibration and the second polarization category corresponding to temperature changes, providing a more accurate basis for subsequent optical modulation decisions.

[0017] Furthermore, this application provides that the optical polarization state is divided into a first polarization class, a second polarization class, and a third polarization class; wherein, the first polarization class is the polarization axis shift caused by mechanical vibration, the second polarization class is the birefringence effect caused by temperature change, and the third polarization class is the transient polarization disturbance under high-speed modulation.

[0018] Preferably, the optical polarization state is divided into three polarization categories: a first polarization category, a second polarization category, and a third polarization category. The first polarization category involves polarization axis shift caused by mechanical vibration. Typically, this is monitored in real-time using a polarization detector or spectrometer to detect changes in the polarization angle and direction of the light. The vibration information is then correlated with changes in the optical polarization state. If the changes in vibration data are synchronized with changes in the optical polarization state (such as a shift in the polarization angle), it can be identified as a polarization category caused by mechanical vibration. The second polarization category involves birefringence caused by temperature changes. Typically, a temperature sensor monitors the temperature of the optical isolator or optical system in real-time. When the temperature change exceeds a predetermined range, the impact of temperature on the optical materials is analyzed to assess whether the change in polarization state is due to birefringence. If the temperature change is significant, it can be identified as a polarization category caused by temperature changes. The third polarization category involves transient polarization disturbances under high-speed modulation. Typically, transient polarization disturbances can be detected by monitoring changes in the optical signal. These disturbances usually manifest as fluctuations in light intensity and rapid changes in polarization direction, especially at higher modulation frequencies. Based on the characteristics of the modulation frequency and polarization changes, it can be identified as a polarization category caused by high-speed modulation. By classifying the polarization state of light into these three categories, we can adopt corresponding adjustment strategies for different polarization change causes, thereby maintaining the stability of the polarization state of light.

[0019] Based on the polarization category, a modulation decision module is constructed, wherein the output of the modulation decision module is communicatively connected to the electro-optic modulator.

[0020] In one embodiment, based on different optical polarization categories, the corresponding triggering conditions and modulation methods are identified, and a modulation decision region is constructed for each optical polarization category. These modulation decision regions are processed in parallel to build a modulation decision module, enabling appropriate responses to various polarization changes. The function of this modulation decision module is to automatically select a suitable modulation method and generate a control signal based on the detected polarization change category, thereby ensuring the stability of the optical polarization state. Furthermore, the output of the modulation decision module is connected to an electro-optic modulator. This means that the control signal generated by the decision module directly drives the electro-optic modulator to perform optical modulation operations to achieve the desired optical effects and ensure that the optical polarization state remains stable under different working environments and disturbances.

[0021] Furthermore, this application provides a modulation decision module built based on the polarization category, including: For the first polarization class, a first trigger condition-modulation mode is identified, and a first modulation decision region is established; for the second polarization class, a second trigger condition-modulation mode is identified, and a second modulation decision region is established; for the third polarization class, a third trigger condition-modulation mode is identified, and a third modulation decision region is established; the first modulation decision region, the second modulation decision region, and the third modulation decision region are established in parallel to create a modulation decision module.

[0022] Optionally, firstly, for the first polarization category (i.e., polarization axis shift caused by mechanical vibration), the first polarization category is used as an index. Combined with the specific application scenario of the optical isolator (e.g., whether it is in a high-vibration environment, whether there are specific equipment influences, etc.), constraints are applied to the optical scenario to determine which specific mechanical vibration environments and operating conditions may lead to changes in the optical polarization state. After determining the application scenario constraints, historical data or existing polarization modulation records are retrieved based on these conditions. This historical data reflects the changes in polarization state and the modulation measures taken under similar mechanical vibration conditions. By mining the retrieved historical data, specific triggering conditions and corresponding modulation methods are identified, and a first modulation decision region is established. This decision region is responsible for automatically initiating the corresponding optical modulation process when the triggering conditions are met, ensuring that the polarization state is stabilized and adjusted. Subsequently, the same method is used to mine and analyze the triggering conditions and modulation methods for the second polarization category (i.e., birefringence effect caused by temperature changes) and the third polarization category (i.e., transient polarization disturbances under high-speed modulation), respectively, to establish the second and third modulation decision regions. Finally, the first modulation decision area, the second modulation decision area, and the third modulation decision area are configured in parallel to form an integrated modulation decision module. Each decision area works independently according to different polarization categories, while also working collaboratively. It makes judgments based on real-time sensing data to select the most suitable polarization modulation strategy, uniformly coordinate the operation of the electro-optic modulator, and ensure the stability of the optical polarization state.

[0023] Furthermore, this application provides a method for mining the first trigger condition-modulation mode for the first polarization class, including: Using the first polarization class as an index and the application based on optical isolators as an optical scene constraint, polarization modulation records are retrieved and determined; based on the polarization modulation records, the first trigger condition - modulation mode is extracted.

[0024] Optionally, the first polarization class can be used as an index to filter out all data and records related to polarization changes caused by mechanical vibration. During the secondary screening of the initially selected records, the specific application scenarios of the optical isolator are introduced, such as communication, laser processing, and optical measurement. These applications may have different operating conditions and interference sources. Based on the characteristics of these application scenarios, corresponding optical scenario constraints are set. For example, in some scenarios, the operating environment of the optical isolator may have stronger mechanical vibration or more stringent temperature control requirements. Therefore, by applying these constraints to the initially screened records, the search scope can be narrowed, focusing on polarization changes that may occur in specific scenarios. This allows for the identification of polarization modulation records more closely related to mechanical vibration. These records include modulation methods triggered by mechanical vibration in similar application scenarios in the past, such as modulation frequency, modulation amplitude, and timing adjustments, providing data support for subsequent decision-making. Subsequently, after retrieving the relevant polarization modulation records, the first triggering condition and modulation mode will be further analyzed and mined based on these records. In this process, the polarization modulation records will be traversed, triggering conditions will be mined based on the largest proportion, and modulation modes will be mined based on the polarization modulation modes under the increasing mechanical vibration, thereby forming the first polarization class of triggering condition-modulation mode pairing, providing a basis for subsequent modulation decisions and ensuring the stability of the light polarization state.

[0025] Furthermore, this application provides a method for mining a first trigger condition—modulation mode—based on the polarization modulation record, including: Traverse the polarization modulation records and mine the critical mechanical vibration vector that triggers modulation with the largest proportion as the first trigger condition; use the critical mechanical vibration vector as the initial value to mine the polarization modulation mode under the mechanical vibration increment and construct the linear first modulation mode; use the first trigger condition and the first modulation mode as the benchmark to perform sample-driven training until convergence and generate the first modulation decision region.

[0026] Optionally, the previously collected polarization modulation records are first traversed. These records contain changes in the optical polarization state and their corresponding modulation methods under different mechanical vibration conditions. For each record, analysis is performed based on parameters such as vibration amplitude, frequency, and duration to identify the most common, i.e., the most prevalent vibration conditions. These vibration conditions reflect the key points of change in the optical polarization state and are the main factors triggering polarization modulation. Subsequently, the critical mechanical vibration vector is extracted from the most prevalent vibration conditions. The critical vibration vector reflects the mechanical vibration conditions under which the optical polarization state will change significantly and requires modulation control. This vector will serve as the first trigger condition; polarization modulation will only be initiated when the mechanical vibration reaches this trigger condition. Then, starting from the critical mechanical vibration vector, the vibration amplitude is gradually increased, and the most common polarization modulation method for each vibration increment is obtained from the polarization modulation records. For example, under slight vibration, only a slight adjustment of the modulation frequency of the electro-optic modulator may be needed; while under larger vibration, a significant adjustment of the modulation depth or frequency may be required to ensure the stability of the polarization state. By linearly arranging the discovered modulation schemes according to their vibration increments, a linear first modulation scheme is constructed. This linear relationship facilitates the dynamic adjustment of the optical modulation strategy based on the real-time detected mechanical vibration intensity in practical applications. Then, the modulation strategy is continuously optimized through sample-driven training. This step can be achieved using machine learning algorithms, training an accurate polarization modulation model using historical data. During training, the parameters of the modulation scheme are adjusted according to actual changes in optical polarization state and vibration conditions until the modulation strategy can effectively cope with different mechanical vibration situations. Training can be performed through iterative optimization, allowing the modulation scheme to gradually converge to the optimal solution. Once training is complete, the current polarization modulation model is output as the first modulation decision region. This first modulation decision region can automatically determine whether modulation control is needed based on real-time vibration conditions and select an appropriate modulation scheme. This decision region will serve as the basis for subsequent modulation decision modules, helping to adjust the polarization state in real time and ensuring that the optical polarization state remains stable under the influence of mechanical vibration.

[0027] The system identifies the light scene and triggers the detection device group to detect the operation process of the optical isolator. Based on the triggering conditions, it determines whether to activate the modulation decision module, determines the polarization modulation strategy, and responds to the electro-optic modulator to perform optical modulation drive control.

[0028] In one embodiment, the current optical scene is first identified, i.e., the working environment and optical characteristics of the optical isolator are determined. Based on different optical scenes, it is possible to identify whether there are any abnormalities in the optical isolator's operation or any conditions affecting its normal operation. If the polarization state of the optical isolator is detected to be unsatisfactory, a detection device group is triggered to monitor the optical isolator's operating status in real time. Subsequently, based on the data provided by the detection device, by analyzing the triggering conditions (such as vibration amplitude, temperature changes, or optical transmission conditions), it is determined whether the modulation decision module needs to be activated. If the triggering conditions indicate that the polarization state of the optical isolator is disturbed or has changed, and has not been effectively adjusted to the expected state, the modulation decision module is activated, and a polarization modulation strategy is executed. This polarization modulation strategy is designed to compensate for the shortcomings of the optical isolator itself. Although the optical isolator can permanently change the polarization state of light through its built-in polarizer, this polarization change is fixed and cannot be dynamically adjusted. Therefore, the optical isolator cannot precisely and in real time adjust its polarization state, which may lead to poor performance due to changes in the external environment or fluctuations in system load. To solve this problem, an electro-optic modulator or other modulation components are introduced to work together to improve the ability to adjust the optical polarization. When an optical isolator cannot independently achieve precise polarization adjustment, an electro-optic modulator can adjust the abnormal polarization state of the optical isolator during operation, achieving dynamic and adjustable polarization control. The modulation decision module drives the electro-optic modulator to perform corresponding modulation operations based on the real-time monitored abnormal polarization state. In this way, it ensures that the optical isolator maintains stable polarization state and optimal performance regardless of external factors (such as mechanical vibration, temperature changes, etc.) that cause polarization state changes during operation, thereby improving the working efficiency and reliability of the optical isolator.

[0029] Furthermore, this application provides a set of detection equipment groups, wherein the detection equipment group performs a first detection based on mechanical vibration, a second detection based on ambient temperature, and a third detection based on step modulation at the same frequency, and the detection equipment group responds during the operation of the optical isolator.

[0030] Optionally, a detection equipment group can be set up, consisting of multiple sensors and detection modules, responsible for real-time monitoring of the optical isolator's operating status. Each detection module within the group is responsible for different types of detection tasks to ensure comprehensive monitoring of the optical isolator's operating environment and factors that may affect its polarization state. This detection equipment group includes three detection methods. The first is a primary detection method based on mechanical vibration. This method specifically monitors the mechanical vibration around the optical isolator, focusing primarily on the amplitude and frequency of the vibration. Mechanical vibration can cause changes in the position of optical components, thus affecting the polarization state of light. Therefore, the sensors acquire vibration data in real time to detect whether vibrations exceed the normal range. If the vibration reaches a certain level, a polarization modulation strategy may need to be activated to correct the polarization change. The second is a secondary detection method based on ambient temperature. This method specifically monitors the impact of ambient temperature changes on the optical isolator's performance. Temperature fluctuations may cause changes in the refractive index of optical materials, thereby affecting the polarization state of light. The temperature sensor continuously monitors the ambient temperature and determines whether there are any abnormal fluctuations to ensure that its performance is not affected. The third method is based on step modulation detection. This method specifically monitors changes in the modulation signal within the optical isolator, particularly transient polarization disturbances that may be caused by high-speed modulation signals. Step modulation typically causes the system to adjust its operating parameters instantaneously, potentially leading to short-term fluctuations in the polarization state. By monitoring changes in the modulation signal, it promptly identifies any disturbances and adjusts the optical polarization state based on the detection results. The detection modules corresponding to these three methods will operate synchronously, monitoring the optical isolator's operating environment and polarization state in real time. This ensures that the equipment can respond promptly to any anomalies or disturbances that may occur during operation, maintaining the stability of the optical polarization state.

[0031] Furthermore, this application provides a method for identifying light scenes, and if there is light path transmission and the optical isolator is pre-triggered, triggering the detection device group.

[0032] Optionally, the optical scene is first identified, that is, the current working environment of the optical isolator and whether there is light transmission in the optical path. In practical applications, the operation of the optical isolator is based on the transmission of light in the optical path. Therefore, when an optical signal is detected passing through the optical isolator, it indicates that the optical path is in working condition, and the optical isolator needs to be monitored and controlled. Once it is confirmed that an optical signal is passing through the optical isolator, the activation of the optical isolator is determined according to predetermined conditions or triggering mechanisms. Pre-triggering can be based on changes in the environment (such as mechanical vibration, temperature changes, etc.) or control signals. When the optical signal passes through and factors that may affect the polarization state are detected, triggering will occur automatically. If the triggering conditions are met, the previously set detection equipment group will be activated, that is, the detection modules for mechanical vibration, temperature change, and modulation disturbance will be started. The detection equipment group begins to monitor the working status of the optical isolator in real time to ensure that any abnormalities or factors affecting polarization are detected in a timely manner. Once a change in polarization state or an abnormal environmental factor is detected, corresponding polarization modulation adjustments will be made to ensure that the optical isolator is always in a stable working state.

[0033] Furthermore, this application provides a method for determining whether to activate the modulation decision module based on triggering conditions, including: For the optical isolation process, the detection equipment group detects and determines a first vibration vector, a second temperature vector, and a third step vector; determines whether the first vibration vector satisfies the first triggering condition, and if so, triggers the first modulation decision region; determines whether the second temperature vector satisfies the second triggering condition, and if so, triggers the second modulation decision region; determines whether the third step vector satisfies the third triggering condition, and if so, triggers the third modulation decision region.

[0034] Optionally, the detection equipment group acquires environmental data of the optical isolator through sensors, including a first vibration vector, a second temperature vector, and a third step vector. The first vibration vector is determined by analyzing the amplitude, frequency, and direction of the vibration, reflecting mechanical vibration in the optical isolator or its surrounding environment. The second temperature vector is determined by temperature data, representing the amplitude and trend of temperature changes. The third step vector is determined by analyzing transient changes in the optical signal, such as rapid signal fluctuations due to modulation rate changes during optical modulation, reflecting transient changes during modulation. Subsequently, it checks whether the first vibration vector meets preset first triggering conditions, such as vibration amplitude and frequency thresholds. If the first vibration vector meets the triggering conditions, it is determined that the optical polarization state may be affected by mechanical vibration, requiring modulation adjustment. At this time, the first modulation decision region is triggered to reduce the impact of vibration on optical polarization. Simultaneously, it also checks whether the second temperature vector meets the second triggering condition and whether the third step vector meets the third triggering condition. If they do, the corresponding modulation decision regions, such as the second and third modulation decision regions, are triggered to ensure that the optical isolator maintains its optimal performance under various complex environments.

[0035] Furthermore, this application provides a method to determine the polarization modulation strategy by superimposing the outputs of each modulation decision region; and to drive the electro-optic modulator to perform polarization modulation control according to the communication connection.

[0036] Optionally, after triggering multiple modulation decision zones and obtaining the modulation strategy (such as modulation frequency, amplitude, timing, etc.) for each zone, the output signals from each zone are integrated. That is, the polarization modulation parameters output from each zone are weighted and superimposed to obtain a comprehensive polarization modulation strategy, ensuring that all environmental factors (such as vibration, temperature, and modulation disturbances) are effectively regulated. Subsequently, through a communication connection with the electro-optic modulator, the comprehensive polarization modulation strategy is transmitted to the electro-optic modulator as a control signal. Upon receiving the control signal, the electro-optic modulator makes corresponding adjustments according to the specified modulation parameters, changing the polarization state of the optical signal. The electro-optic modulator is typically controlled by electronic signals, changing the polarization direction and intensity of the light wave through the action of an electric field. According to the given modulation strategy, the modulator adjusts the polarization state of the light, thereby compensating for the influence of the external environment on polarization, ensuring that the optical signal can adapt to different environmental changes and maintaining the stable performance of the optical isolator.

[0037] In summary, the embodiments of this application have at least the following technical effects: This application first classifies optical polarization states based on optical polarization causes, dividing them into polarization categories. Then, based on these polarization categories, a modulation decision module is constructed, wherein the output of the modulation decision module is communicatively connected to an electro-optic modulator. Finally, an optical scene is identified and a detection device group is triggered to monitor the operation progress of the optical isolator. Based on the triggering conditions, it is determined whether to activate the modulation decision module, thereby determining the polarization modulation strategy and responding to the electro-optic modulator for optical modulation drive control. These technical effects collectively solve the technical problem of optical polarization states being prone to instability in dynamic environments, leading to a decrease in the isolation performance of optical isolators. This achieves the technical effect of high-precision, real-time, and stable optical isolation control through adaptive polarization modulation.

[0038] Example 2, based on the same inventive concept as the optical isolator coupling control method used in the foregoing examples to maintain stable optical polarization states, such as... Figure 2 As shown, this application provides an optical isolator coupling control system for maintaining stable optical polarization state. The system includes: a polarization classification unit 11: classifying optical polarization state based on optical polarization causes and dividing polarization categories; a modulation decision module construction unit 12: constructing a modulation decision module according to the polarization categories, wherein the output of the modulation decision module is communicatively connected to an electro-optic modulator; and an optical modulation drive control unit 13: identifying the optical scene and triggering a detection device group to detect the operation process of the optical isolator, determining whether to activate the modulation decision module according to the triggering conditions, determining the polarization modulation strategy, and responding to the electro-optic modulator to perform optical modulation drive control.

[0039] Furthermore, the polarization classification unit 11 is also configured to perform the following method: The optical polarization state is divided into a first polarization class, a second polarization class, and a third polarization class; wherein, the first polarization class is the polarization axis shift caused by mechanical vibration, the second polarization class is the birefringence effect caused by temperature change, and the third polarization class is the transient polarization disturbance under high-speed modulation.

[0040] Furthermore, the modulation decision module building unit 12 is also used to perform the following method: For the first polarization class, a first trigger condition-modulation mode is identified, and a first modulation decision region is established; for the second polarization class, a second trigger condition-modulation mode is identified, and a second modulation decision region is established; for the third polarization class, a third trigger condition-modulation mode is identified, and a third modulation decision region is established; the first modulation decision region, the second modulation decision region, and the third modulation decision region are established in parallel to create a modulation decision module.

[0041] Furthermore, the modulation decision module building unit 12 is also used to perform the following method: Using the first polarization class as an index and the application based on optical isolators as an optical scene constraint, polarization modulation records are retrieved and determined; based on the polarization modulation records, the first trigger condition - modulation mode is extracted.

[0042] Furthermore, the modulation decision module building unit 12 is also used to perform the following method: Traverse the polarization modulation records and mine the critical mechanical vibration vector that triggers modulation with the largest proportion as the first trigger condition; use the critical mechanical vibration vector as the initial value to mine the polarization modulation mode under the mechanical vibration increment and construct the linear first modulation mode; use the first trigger condition and the first modulation mode as the benchmark to perform sample-driven training until convergence and generate the first modulation decision region.

[0043] Furthermore, the optical modulation drive control unit 13 is also used to perform the following method: A detection equipment group is set up, wherein the detection equipment group performs a first detection based on mechanical vibration, a second detection based on ambient temperature, and a third detection based on step modulation at the same frequency, and the detection equipment group responds during the operation of the optical isolator.

[0044] Furthermore, the optical modulation drive control unit 13 is also used to perform the following method: If an optical scene is identified and an optical path is transmitted and the optical isolator is pre-triggered, the detection device group is triggered.

[0045] Furthermore, the optical modulation drive control unit 13 is also used to perform the following method: For the optical isolation process, the detection equipment group detects and determines a first vibration vector, a second temperature vector, and a third step vector; determines whether the first vibration vector satisfies the first triggering condition, and if so, triggers the first modulation decision region; determines whether the second temperature vector satisfies the second triggering condition, and if so, triggers the second modulation decision region; determines whether the third step vector satisfies the third triggering condition, and if so, triggers the third modulation decision region.

[0046] Furthermore, the optical modulation drive control unit 13 is also used to perform the following method: The polarization modulation strategy is determined by superimposing the outputs of each modulation decision region; and the electro-optic modulator is driven to perform polarization modulation control according to the communication connection.

[0047] It should be noted that the order of the embodiments described above is merely for descriptive purposes and does not represent the superiority or inferiority of the embodiments. Furthermore, the above description focuses on specific embodiments of this specification. The processes depicted in the accompanying drawings do not necessarily require a specific or sequential order to achieve the desired results. In some implementations, multitasking and parallel processing are possible or may be advantageous.

[0048] The above description is only a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

[0049] This specification and accompanying drawings are merely illustrative examples of this application and are intended to cover any and all modifications, variations, combinations, or equivalents within the scope of this application. Clearly, those skilled in the art can make various alterations and modifications to this application without departing from its scope. Therefore, if such modifications and modifications fall within the scope of this application and its equivalents, this application intends to include such modifications and modifications.

Claims

1. A method for controlling the coupling of an optical isolator to maintain a stable optical polarization state, characterized in that, The method includes: Based on the causes of light polarization, the polarization state is classified and polarization categories are defined; Based on the polarization category, a modulation decision module is constructed, wherein the output of the modulation decision module is communicatively connected to the electro-optic modulator; The system identifies the light scene and triggers the detection device group to detect the operation process of the optical isolator. Based on the triggering conditions, it determines whether to activate the modulation decision module, determines the polarization modulation strategy, and responds to the electro-optic modulator to perform optical modulation drive control.

2. The optical isolator coupling control method for maintaining stable optical polarization state as described in claim 1, characterized in that, The optical polarization states are divided into a first polarization class, a second polarization class, and a third polarization class; Among them, the first polarization category is the polarization axis shift caused by mechanical vibration, the second polarization category is the birefringence effect caused by temperature change, and the third polarization category is the transient polarization disturbance under high-speed modulation.

3. The optical isolator coupling control method for maintaining stable optical polarization state as described in claim 2, characterized in that, Based on the polarization category, a modulation decision module is constructed, including: For the first polarization class, the first trigger condition - modulation mode is explored, and the first modulation decision region is constructed; For the second polarization class, the second triggering condition - modulation mode - is explored, and a second modulation decision region is constructed; For the third polarization class, a third triggering condition—modulation mode—is explored, and a third modulation decision region is constructed; A modulation decision module is established by parallelizing the first modulation decision area, the second modulation decision area, and the third modulation decision area.

4. The optical isolator coupling control method for maintaining stable optical polarization state as described in claim 3, characterized in that, For the first polarization class, the first trigger condition - modulation mode is extracted, including: Using the first polarization class as an index and the application based on optical isolators as an optical scene constraint, polarization modulation records are retrieved and determined. Based on the polarization modulation record, the first trigger condition - modulation mode - is extracted.

5. The optical isolator coupling control method for maintaining stable optical polarization state as described in claim 4, characterized in that, Based on the polarization modulation record, the first trigger condition - modulation mode - is extracted, including: Traverse the polarization modulation record and extract the critical mechanical vibration vector triggered by modulation with the largest proportion as the first triggering condition; Using the critical mechanical vibration vector as the initial value, the polarization modulation mode mining under the mechanical vibration increment is performed to construct a linear first modulation mode; Based on the first triggering condition and the first modulation method, sample-driven training is performed until convergence, generating the first modulation decision region.

6. The optical isolator coupling control method for maintaining stable optical polarization state as described in claim 3, characterized in that, A detection equipment group is set up, wherein the detection equipment group performs a first detection based on mechanical vibration, a second detection based on ambient temperature, and a third detection based on step modulation at the same frequency, and the detection equipment group responds during the operation of the optical isolator.

7. The optical isolator coupling control method for maintaining stable optical polarization state as described in claim 6, characterized in that, If an optical scene is identified and an optical path is transmitted and the optical isolator is pre-triggered, the detection device group is triggered.

8. The optical isolator coupling control method for maintaining stable optical polarization state as described in claim 7, characterized in that, Determining whether to activate the modulation decision module based on triggering conditions includes: For the optical isolation process, the detection equipment group detects and determines a first vibration vector, a second temperature vector, and a third step vector; Determine whether the first vibration vector satisfies the first triggering condition; if it does, trigger the first modulation decision region. Determine whether the second temperature vector satisfies the second triggering condition; if so, trigger the second modulation decision region. Determine whether the third step vector satisfies the third triggering condition; if so, trigger the third modulation decision region.

9. The optical isolator coupling control method for maintaining stable optical polarization state as described in claim 1, characterized in that, The polarization modulation strategy is determined by superimposing the outputs of each modulation decision region. Based on the communication connection, the electro-optic modulator is driven to perform polarization modulation control.

10. An optical isolator coupling control system for maintaining stable optical polarization state, characterized in that, For implementing the optical isolator coupling control method for maintaining stable optical polarization state according to any one of claims 1-9, the system comprises: Polarization classification unit: Based on the causes of light polarization, classify the polarization state of light and divide it into polarization categories; Modulation decision module building unit: Based on the polarization category, a modulation decision module is built, wherein the output of the modulation decision module is communicatively connected to the electro-optic modulator; Optical modulation drive control unit: identifies the optical scene and triggers the detection device group to detect the operation process of the optical isolator, determines whether to activate the modulation decision module according to the triggering conditions, determines the polarization modulation strategy, and performs optical modulation drive control in response to the electro-optic modulator.

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