CN-121995658-A - Optical isolator coupling control method and system for keeping stable optical polarization state

CN121995658ACN 121995658 ACN121995658 ACN 121995658ACN-121995658-A

Abstract

The application relates to the technical field of optics, and provides an optical isolator coupling control method and system for keeping stable optical polarization state. The method comprises the steps of classifying light polarization states by light polarization inducements, classifying the light polarization states, constructing a modulation decision module according to the polarization types, wherein the output end of the modulation decision module is in communication connection with an electro-optical modulator, identifying light scenes and triggering a detection equipment group, detecting the operation progress of an optical isolator, judging whether the modulation decision module is activated or not according to triggering conditions, determining a polarization modulation strategy, and responding to the electro-optical modulator to carry out light modulation driving control. The application solves the technical problem that the isolation performance of the optical isolator is reduced due to the fact that the optical polarization state is easy to be unstable in a dynamic environment, and achieves the technical effect of realizing high-precision and real-time stable optical isolation control through adaptive polarization modulation.

Inventors

LI JIAYU
LU SICHENG
YAN HUIMIN

Assignees

武汉驿路通科技股份有限公司

Dates

Publication Date: 20260508
Application Date: 20260224

Claims (10)

1. An optical isolator coupling control method for maintaining stable optical polarization states, the method comprising: Classifying the light polarization states by light polarization inducements, and classifying polarization categories; Constructing a modulation decision module according to the polarization category, wherein the output end of the modulation decision module is in communication connection with the electro-optical modulator; and identifying an optical scene, triggering a detection equipment group, detecting the operation progress of the optical isolator, judging whether to activate the modulation decision module according to the triggering condition, determining a polarization modulation strategy, and responding to the electro-optical modulator to carry out light modulation driving control.
2. The optical isolator coupling control method for maintaining a stable optical polarization state as claimed in claim 1, wherein the optical polarization state is divided into a first polarization class, a second polarization class, and a third polarization class; The first polarization class is polarization axis deviation caused by mechanical vibration, the second polarization class is a double refraction effect caused by temperature change, and the third polarization class is transient polarization disturbance under high-speed modulation.
3. The method for coupling control of an optical isolator for maintaining stable optical polarization state according to claim 2, wherein constructing a modulation decision module according to the polarization class comprises: Aiming at the first polarization class, a first triggering condition-modulation mode is excavated, and a first modulation decision area is built; Aiming at the second polarization class, a second triggering condition-modulation mode is excavated, and a second modulation decision area is built; Aiming at the third polarization class, a third triggering condition-modulation mode is excavated, and a third modulation decision area is built; And establishing a modulation decision module by parallel connection of the first modulation decision area, the second modulation decision area and the third modulation decision area.
4. An optical isolator coupling control method for maintaining a stable optical polarization state as claimed in claim 3, wherein mining a first trigger condition-modulation scheme for the first polarization class comprises: Taking the first polarization class as an index, taking the application based on the optical isolator as an optical scene constraint, and searching and determining a polarization modulation record; and mining a first trigger condition-modulation mode according to the polarization modulation record.
5. The method for optical isolator coupling control for maintaining stable optical polarization state as claimed in claim 4, wherein mining the first trigger condition-modulation scheme based on the polarization modulation record comprises: traversing the polarization modulation record, and mining a critical mechanical vibration vector triggered by modulation with the maximum duty ratio to serve as a first trigger condition; Taking the critical mechanical vibration vector as an initial value, executing polarization modulation mode excavation under mechanical vibration increment, and constructing a linear first modulation mode; And executing sample driving training to converge by taking the first triggering condition and the first modulation mode as references, and generating the first modulation decision area.
6. An optical isolator coupling control method for maintaining a stable optical polarization state as claimed in claim 3, wherein a detection device group is set, wherein the detection device group performs a first detection based on mechanical vibration at the same frequency, a second detection based on ambient temperature, a third detection based on step modulation, and the detection device group responds during an optical isolator operation.
7. An optical isolator coupling control method for maintaining a stable optical polarization state as claimed in claim 6, wherein an optical scene is identified, and the group of detection devices is triggered if there is optical path transfer and the optical isolator is pre-triggered.
8. The method for optical isolator coupling control for maintaining stable optical polarization state as claimed in claim 7, wherein determining whether to activate the modulation decision module according to a trigger condition comprises: For the light isolation process, the detection equipment group detects and determines a first vibration vector, a second temperature vector and a third step vector; judging whether the first vibration vector meets the first triggering condition, and if so, triggering the first modulation decision area; Judging whether the second temperature vector meets the second triggering condition, and if so, triggering the second modulation decision area; And judging whether the third step vector meets the third triggering condition, and if so, triggering the third modulation decision area.
9. The method for optical isolator coupling control for maintaining stable optical polarization state as claimed in claim 1, wherein the polarization modulation strategy is determined by superimposing the outputs of the modulation decision regions; and driving the electro-optical modulator to perform polarization modulation control according to the communication connection.
10. An optical isolator coupling control system for maintaining the stability of the polarization state of light, characterized in that it is used to implement the optical isolator coupling control method for maintaining the stability of the polarization state of light according to any one of claims 1 to 9, said system comprising: the polarization classification unit classifies the polarization states of the light according to the polarization inducements of the light and classifies the polarization categories; a modulation decision module construction unit for constructing a modulation decision module according to the polarization category, wherein the output end of the modulation decision module is in communication connection with the electro-optical modulator; And the light modulation driving control unit is used for identifying the light scene, triggering the detection equipment group, detecting the operation progress of the optical isolator, judging whether the modulation decision module is activated or not according to the triggering condition, determining the polarization modulation strategy and responding to the electro-optical modulator to carry out light modulation driving control.

Description

Optical isolator coupling control method and system for keeping stable optical polarization state Technical Field The application relates to the technical field of optics, in particular to an optical isolator coupling control method and system for keeping stable optical polarization state. Background Under the background of rapid development of optical communication technology, the requirements on optical signal transmission quality and system stability are increasingly stringent, and the performance of an optical isolator is used as a key device for guaranteeing unidirectional transmission of an optical path and directly influences the reliability of the whole optical system. The traditional optical isolator has remarkable challenges in coping with complex application scenes, namely uncontrollable deflection of a polarization axis can be caused by micro-displacement of an optical element caused by vibration when an optical path passes through a mechanical vibration environment, and in a working scene with severe temperature fluctuation, uniformity of a polarization state can be damaged by a double refraction effect of an optical material caused by expansion and contraction, and signal distortion can be directly caused by polarization disturbance caused by transient electro-optic effect in the face of a high-speed light modulation application scene. However, the existing optical isolator mostly adopts a static compensation structure or an open loop control mode, so that it is difficult to track the polarization disturbance characteristics in a complex environment in real time, and especially under the action of multi-physical field coupling, a differential response mechanism for polarization axis deflection caused by mechanical vibration, a birefringence effect caused by temperature gradient and transient modulation interference is lacked, so that the stability of the system is limited. Disclosure of Invention The application provides an optical isolator coupling control method and an optical isolator coupling control system for keeping the light polarization state stable, and aims to solve the technical problem that the light polarization state is easy to be unstable in a dynamic environment, so that the isolation performance of an optical isolator is reduced. In a first aspect of the disclosure, an optical isolator coupling control method for maintaining stable optical polarization states is provided, the method comprising classifying the optical polarization states by an optical polarization cause, classifying the polarization categories; and identifying an optical scene, triggering a detection equipment group, detecting the operation progress of the optical isolator, judging whether the modulation decision module is activated or not according to triggering conditions, determining a polarization modulation strategy, and performing light modulation driving control in response to the electro-optical modulator. The application discloses another aspect of the optical isolator coupling control system for keeping the stable optical polarization state, which comprises a polarization classification unit, a modulation decision module building unit, an optical modulation driving control unit and a light modulation driving control unit, wherein the polarization classification unit classifies the optical polarization state by an optical polarization inducement, classifies the optical polarization state into polarization categories, the modulation decision module building unit builds a modulation decision module according to the polarization categories, wherein the output end of the modulation decision module is in communication connection with an electro-optical modulator, the optical modulation driving control unit identifies an optical scene and triggers a detection equipment group to detect the operation progress of the optical isolator, judges whether the modulation decision module is activated according to trigger conditions, determines a polarization modulation strategy and responds to the electro-optical modulator to carry out optical modulation driving control. One or more technical schemes provided by the application have at least the following technical effects or advantages: The optical isolator coupling control method for keeping the light polarization state stable divides the light polarization state into different categories by analyzing the inducement of the light polarization. Based on these categories, a modulation decision module is then created, the output of which is connected to the electro-optic modulator. And then, monitoring the working process of the optical isolator by identifying the current light scene and triggering corresponding detection equipment, and judging whether the modulation decision module needs to be activated or not. Then, according to the detected triggering condition, whether to start the polarization modulation strategy is determined, and the polarization state of the opt