External field driving and control circuit of topological optical fiber memory

Abstract

The application discloses an external force field driving and control circuit of a topological optical fiber memory. The circuit comprises a control interface module, a reference signal generation module, a driving signal generation module, a driving output module, a feedback acquisition module, a stability determination module, a closed-loop control module, a multi-channel expansion module and a power management module. The driving signal generation module calculates a driving deviation according to a target number and a current number, and generates a driving signal; the feedback acquisition module acquires topological state parameters in real time; the stability determination module determines storage state stability according to a topological stability criterion; and the closed-loop control module generates an adjustment signal to adjust driving parameters when the criterion is not satisfied. The application realizes high-precision external force field driving and closed-loop stability control of the topological optical fiber memory, has the outstanding advantages of high precision, fast response and multi-channel independent regulation and control, and can be applied to the topological optical fiber memory and a distributed optical fiber storage network.

Description

Technical Field

[0001] This invention relates to the fields of optical storage drive control technology and topological photonics technology, specifically to an external force field drive and control circuit for a topological fiber optic memory. This invention can be applied to fields such as topological fiber optic memories, optical communication buffers, quantum information storage, and distributed fiber optic storage networks, and is particularly suitable for drive control scenarios requiring precise control of the Chern number state of topological materials to achieve topologically protected storage of optical signals. Background Technology

[0002] Topological fiber optic memory utilizes the fiber structure of topological materials to achieve topologically protected storage of optical signals. Its core mechanism involves using an external force field to modulate the topological Chern number of the topological material, thereby bringing the optical signal into a topologically protected state. The external force field driving and control circuit is the key component for realizing this modulation, and its performance directly affects the reliability and accuracy of the storage. Existing external force field driving and control technologies mainly suffer from the following problems: (a) Insufficient driving precision Existing driving circuits are mainly designed for general electro-optic devices. The accuracy and stability of the output voltage / current are difficult to meet the high-precision requirements of topology Chern number control (ΔC≤0.01), resulting in large topology state control errors. (ii) Lack of closed-loop control with topological stability criteria The existing drive circuit is an open-loop design, which only outputs drive signals according to preset parameters. It lacks real-time feedback control capability based on topology stability criteria and cannot dynamically adjust drive parameters according to the actual state of the stored state. (iii) Weak independent regulation capability across multiple channels In distributed fiber optic storage networks, each storage node requires independent Chern number control. Existing drive circuits are mostly single-channel designs, resulting in large crosstalk and poor synchronization when expanding to multiple channels. (iv) Slow drive response speed Topology number control requires a fast drive response (response time ≤ 1μs), and the response speed of existing drive circuits is difficult to meet the requirements of high-speed memory systems. (v) Lack of a unified driving architecture for multiple external force fields Topological Chern number control can be achieved through various means such as electric field, magnetic field, optical field or stress field. Existing driving circuits usually only support a single driving method and lack a unified driving architecture. To address the above problems, this invention provides an external force field driving and control circuit for a topological fiber optic memory. Summary of the Invention

[0003] (a) Purpose of the invention This invention aims to solve the technical problems in existing external force field driving and control circuits, such as insufficient driving accuracy, lack of closed-loop control, weak multi-channel independent control capability, slow response speed, and lack of unified driving architecture for multiple external force fields, and provides an external force field driving and control circuit for a topological fiber optic memory. (II) Technical Solution This invention provides an external force field driving and control circuit for a topological fiber optic memory, characterized in that it includes: A control interface module is used to receive drive instructions from a host computer or network control center. The drive instructions include target topology values, drive mode, and drive parameters. A reference signal generation module is connected to the control interface module and is used to generate a reference signal according to the drive command. The reference signal includes at least one of voltage reference, current reference, frequency reference or phase reference. A drive signal generation module is connected to the reference signal generation module and is used to generate a drive signal according to the reference signal. The drive signal includes at least one of a voltage drive signal, a current drive signal, an optical drive signal, or a stress drive signal. A drive output module is connected to the drive signal generation module and the topology optical fiber, and is used to apply the drive signal to the topology optical fiber to adjust the topological Chern number of the topology material; A feedback acquisition module is connected to the optical fiber of the topology structure for real-time acquisition of the topological state parameters of the optical signal in the optical fiber of the topology structure. A stability determination module, connected to the feedback acquisition module, is used to determine whether the current storage state is in a stable topological state based on the topological stability criterion. A closed-loop control module is connected to the stability determination module and the drive signal generation module, and is used to generate an adjustment signal to adjust the parameters of the drive signal when the criterion is not met. A multi-channel expansion module is connected to the control interface module to support independent control and synchronous output of multiple drive channels; A power management module is connected to the above modules to provide stable operating voltage and current. The correspondence between driving methods and Chern number control: The drive output module supports at least one of the following drive methods: Electric field driving: Applying an electric field to the topological fiber changes the Chern number through the quantum Stark effect or band modulation. Magnetic field drive: Applying a magnetic field to the topological optical fiber changes the topological Chern number through the quantum Hall effect. Optical driving: Applying pump light of a specific wavelength to an optical fiber with a specific topology changes the Chern number through an optically induced topological phase transition. Stress-driven: Applying mechanical stress to the fiber optic topology alters the Chern number through lattice distortion. Core mathematical framework: The drive signal generation module calculates the drive bias based on the target topology Chern value C_target and the current topology Chern value C_current: The mapping relationship between the driving signal strength and the Chern number deviation is as follows: Where V_drive is the driving voltage, and K_p, Ki, and K_d are the proportional, integral, and derivative control parameters, respectively. The stability determination module determines whether the storage state is stable based on the following criteria: Where γ is the photon loss rate. denoted as the rate of change of the projection angle, C as the topological Chern number, k as the restitution coefficient, and h as Planck's constant. When the criterion is met, the storage state is in a stable topology state, and the driver maintains the current parameters; when the criterion is not met, closed-loop adjustment is triggered. The closed-loop control module generates an adjustment signal based on the deviation of the stability criterion: Where Δθ is the projection angle deviation. Let α be the rate of change of the projection angle, and β be the control parameters. Multi-channel independent control: The multi-channel expansion module supports N independent drive channels, where N≤128. Each channel has independent drive signal generation, drive output, and feedback acquisition capabilities, with inter-channel crosstalk ≤-60dB and synchronization accuracy ≤1ns. (III) Beneficial Effects High-precision drive: Employs PID closed-loop control, with a drive accuracy ΔC ≤ 0.01, meeting the accuracy requirements of topology Chern number control. Closed-loop stability control: Real-time feedback control based on topology stability criteria to ensure that the storage state is always in a stable topology state. Multi-channel independent control: Supports up to 128 independent drive channels, each channel is controlled independently, and the synchronization accuracy is ≤1ns. Unified architecture with multiple driving modes: Supports four driving modes: electric field, magnetic field, optical field, and stress field, suitable for different topological materials and different control requirements. Fast response: Drive response time ≤ 1μs, meeting the requirements of high-speed storage systems. Low power consumption design: Employs a high-efficiency power management module, with standby power consumption ≤10mW. Attached Figure Description

[0004] Figure 1 A schematic diagram of the overall structure of the external force field driving and control circuit of the topological fiber optic memory provided in an embodiment of the present invention. Figure 2 The flowchart for closed-loop control and stability determination provided in the embodiments of the present invention is shown. Figure 3 This is a schematic diagram of a multi-channel independent driving architecture provided in an embodiment of the present invention. Figure 4 This is a schematic diagram showing the correspondence between the driving method and the Chern number control provided in an embodiment of the present invention. Detailed Implementation

[0005] Example 1: Electric Field Drive Circuit Based on PID Closed-Loop Control Step 1: Configure the control interface and reference signal The control interface module receives drive commands from the host computer, with the target topology value C_target=1, the drive method being electric field drive, and the drive voltage range being 0-10V. The reference signal generation module generates a voltage reference signal V_ref=5V based on the drive commands. Step 2: Drive signal generation and output The drive signal generation module generates a voltage drive signal based on the reference signal, which is then applied to the electrode array of the optical fiber topology via the drive output module. The initial drive voltage V_drive = 5V. Step 3: Topological state monitoring and feedback acquisition The feedback acquisition module acquires the projection angle θ and its rate of change of the optical signal in the optical fiber in real time. Sampling rate 1MHz, acquisition accuracy δθ≤10⁻ 6 rad. Step 4: Stability determination The stability determination module determines stability based on the criteria. Determine if the storage state is stable. Step 5: Closed-loop adjustment When the criterion is not met, the closed-loop control module generates an adjustment signal based on the deviation to adjust the drive voltage. The PID control parameters are K_p=2.0, Ki=0.5, and K_d=0.1, and the drive voltage adjustment accuracy is ΔV≤0.01V. Step 6: Lock Confirmation When the stability criterion is met, it is confirmed that the Chern number has been locked to the target value, and the drive circuit enters the holding state to maintain the current drive parameters. Example 2: Multi-channel independent drive control Step 1: Configure the multi-channel expansion module The drive circuitry was expanded to eight channels, each connected to one of the eight storage nodes in the distributed fiber optic storage network. The target cadmium values ​​for each channel were independently allocated by the network control center. Step 2: Independent drive output Each channel independently generates and outputs a drive signal based on the assigned target value. Channel 1 has target C=1, Channel 2 has target C=-1, and Channel 3 has target C=2. The drive parameters for each channel are configured independently. Step 3: Independent Feedback and Closed-Loop Control Each channel independently performs topological state monitoring and stability determination. When the criteria for any channel are not met, only the closed-loop adjustment is performed on that channel without affecting other channels. Step 4: Synchronization Performance Verification 8-channel synchronous output, synchronization accuracy ≤1ns, inter-channel crosstalk ≤-60dB. Example 3: Multi-drive compatibility design Step 1: Select Driver Method The driving method is selected based on the type and material properties of the optical fiber topology. Electric field driving is used for topological insulator-core fibers, while magnetic field driving is used for topological photonic crystal cladding fibers. Step 2: Configure driver parameters Electric field drive mode: Output voltage 0-10V, output current ≤100mA. Magnetic field drive mode: Output current 0-1A, driving an electromagnetic coil to generate a magnetic field. Step 3: Switching the driver mode The system switches between electric field drive and magnetic field drive via the drive mode selection command of the control interface module, with a switching time ≤1μs. Terminology Explanation

[0006] Terminology Meaning External force field driven: Applying external excitation to the topological material through electric field, magnetic field, light field or stress field to control its topological Chern number. Closed-loop control: A control method that adjusts drive parameters in real time based on feedback signals. Driving bias (ΔC): The difference between the target topology Chern value and the current topology Chern value. PID control: Proportional-Integral-Derivative control, which achieves precise adjustment through three control parameters. Multi-channel expansion: Supports parallel control capability of multiple independent drive channels. Topological parameters: physical quantities that describe the characteristics of the topological state, including the projection angle θ and its rate of change θ̇.

Claims

1. An external force field driving and control circuit for a topological fiber optic memory, characterized in that, include: A control interface module is used to receive drive instructions, which include target topology values, drive mode, and drive parameters; A reference signal generation module is connected to the control interface module and is used to generate a reference signal according to the drive command; A drive signal generation module is connected to the reference signal generation module and is used to generate a drive signal based on the reference signal. A drive output module is connected to the drive signal generation module and the topology optical fiber, and is used to apply the drive signal to the topology optical fiber to adjust the topological Chern number of the topology material; A feedback acquisition module is connected to the optical fiber of the topology structure for real-time acquisition of the topological state parameters of the optical signal in the optical fiber of the topology structure. A stability determination module, connected to the feedback acquisition module, is used to determine whether the current storage state is in a stable topological state based on the topological stability criterion. A closed-loop control module is connected to the stability determination module and the drive signal generation module, and is used to generate an adjustment signal to adjust the parameters of the drive signal when the criterion is not met. A multi-channel expansion module is connected to the control interface module to support independent control and synchronous output of multiple drive channels; A power management module is connected to the above modules to provide stable operating voltage and current.

2. The circuit according to claim 1, characterized in that: The driving signal includes at least one of voltage driving signal, current driving signal, light driving signal or stress driving signal; the driving method includes at least one of electric field driving, magnetic field driving, light driving or stress driving.

3. The circuit according to claim 1, characterized in that: The drive signal generation module calculates the drive deviation ΔC = C_target - C_current based on the target topology Chern value C_target and the current topology Chern value C_current. The mapping relationship between the drive signal strength and the Chern deviation is as follows: Where V_drive is the driving voltage, and K_p, Ki, and K_d are the proportional, integral, and derivative control parameters, respectively.

4. The circuit according to claim 1, characterized in that: The stability determination module determines whether the storage state is stable based on the following criteria: Where γ is the photon loss rate. denoted as the rate of change of the projection angle, C as the topological Chern number, k as the restitution coefficient, and h as Planck's constant.

5. The circuit according to claim 1, characterized in that: The closed-loop control module generates an adjustment signal based on the deviation of the stability criterion: Where Δθ is the projection angle deviation. Let α be the rate of change of the projection angle, and β be the control parameters.

6. The circuit according to claim 1, characterized in that: The sampling rate of the feedback acquisition module is ≥1MHz, and the acquisition accuracy δθ≤10⁻ 6 rad.

7. The circuit according to claim 1, characterized in that: The multi-channel expansion module supports N independent drive channels, N≤128, crosstalk between channels≤-60dB, and synchronization accuracy≤1ns.

8. The circuit according to claim 1, characterized in that: The drive output module has a drive response time ≤1μs and a drive voltage regulation accuracy ΔV ≤0.01V.

9. The circuit according to claim 1, characterized in that: The power management module supports multiple independent power supplies, with a standby power consumption of ≤10mW.

10. A method for driving and controlling an external force field in a topological fiber optic memory, characterized in that, Includes the following steps: (1) Receive driving instructions and determine the target topology values, driving mode and driving parameters; (2) Generate a reference signal according to the driving instruction, and generate a driving signal according to the reference signal; (3) Apply the driving signal to the optical fiber of the topology structure to adjust the topological Chern number of the topological material; (4) Real-time acquisition of topological state parameters of optical signals in the optical fiber of the aforementioned topology; (5) Determine whether the current storage state is in a stable topological state based on the topological stability criterion; (6) When the criterion is not met, an adjustment signal is generated to adjust the parameters of the driving signal; (7) Repeat steps (3) to (6) until the storage state enters a stable topological state.

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