CN-122027037-A - Cooperative control method of variable optical attenuator and related equipment

CN122027037ACN 122027037 ACN122027037 ACN 122027037ACN-122027037-A

Abstract

The invention relates to a cooperative control method of a variable optical attenuator and related equipment. The method comprises the steps of storing target attenuation values corresponding to variable optical attenuators in a shared configuration unit for read-write access by a plurality of control units working cooperatively in a system, acquiring the target attenuation values from the shared configuration unit by a target control unit executing quantum task operation before executing one quantum task operation of a coherent optical quantum computing system, carrying out suitability verification on the target attenuation values based on system physical constraints associated with quantum task stages to which the quantum task operation belongs, executing the quantum task operation according to the target attenuation values by the target control unit if verification is passed, suspending or stopping the quantum task operation if verification is not passed, and triggering a preset protection mechanism. The method at least partially solves the problems of poor cooperative control effect and poor control method adaptability in the related technology.

Inventors

WEN KAI
MA YIN
WEI HAI
WANG YONG
Pei Fumeng

Assignees

北京玻色量子科技有限公司

Dates

Publication Date: 20260512
Application Date: 20260214

Claims (10)

1. A cooperative control method of a variable optical attenuator, applied to a coherent optical quantum computing system including an optical parametric oscillator, the variable optical attenuator being disposed in an injection optical path of the system for adjusting an optical power injected into the optical parametric oscillator, the method comprising: Storing a target attenuation value corresponding to the variable optical attenuator in a shared configuration unit so as to enable a plurality of control units working cooperatively in the system to perform read-write access; Before executing one quantum task operation of the coherent light quantum computing system, acquiring the target attenuation value from the shared configuration unit by a target control unit executing the quantum task operation, and performing suitability verification on the target attenuation value based on a system physical constraint associated with a quantum task stage to which the quantum task operation belongs, wherein the system physical constraint comprises one or more of a coherence time requirement of a quantum bit, a threshold characteristic of the optical parametric oscillator and a signal-to-noise ratio requirement of system measurement feedback; If the suitability check is passed, executing the quantum task operation according to the target attenuation value through the target control unit; if the suitability check is not passed, suspending or stopping the quantum task operation, and triggering a preset protection mechanism.
2. The method of claim 1, wherein when the quantum task operation is a system initialization operation, the step of the target control unit performing the quantum task operation according to the target attenuation value comprises: before the system initialization operation is started, the variable optical attenuator is configured into a first configuration state, wherein the optical attenuation corresponding to the first configuration state is smaller than the optical attenuation corresponding to the target attenuation value, and the first configuration state is a state of enabling injected light to pass through without attenuation or approximately without attenuation; The system initialization operation is executed, wherein the total duration from the configuration of the first configuration state to the execution of the system initialization operation is controlled within a preset time threshold; After the system initialization operation is completed, the variable optical attenuator is configured back to a second configuration state corresponding to the target attenuation value.
3. The method of claim 1, wherein when the quantum task operation involves adjusting the injection optical power to a target optical power value, the step of the target control unit performing the quantum task operation in accordance with the target attenuation value comprises: The actual attenuation value of the variable optical attenuator is regulated, the actual optical power is obtained after each regulation is completed until the difference value between the actual optical power and the target optical power value meets a preset difference value threshold, and the regulation is stopped and the current actual attenuation value is obtained; and sending the current actual attenuation value to the shared configuration unit so as to update the stored target attenuation value.
4. The method of claim 1, wherein the step of suitability checking comprises: determining whether the target attenuation value is within a predefined static safety range or, And judging whether the target attenuation value meets a dynamic safety range determined based on the system physical constraint, wherein the dynamic safety range is determined according to real-time system state information reflecting the system physical constraint, and the real-time system state information comprises one or more of a current working point of the optical parametric oscillator, a real-time monitored quantum bit coherence time and a real-time signal to noise ratio of system measurement feedback.
5. The method of claim 4, wherein the step of suitability checking further comprises: Judging whether the quantum task stage to which the quantum task operation belongs is matched with a quantum task stage identifier associated with the target attenuation value, wherein when the target attenuation value is stored in the shared configuration unit, the corresponding quantum task stage identifier is stored in an associated mode.
6. The method of claim 4, wherein when the number of variable optical attenuators is plural and is used to adjust a plurality of different optical paths in the system, respectively, the system physical constraints further comprise a target relative power relationship between the plurality of different optical paths associated with the quantum task operation, wherein, The step of suitability checking further comprises: and if the quantum task operation needs the cooperative work of the plurality of different light paths, checking whether the expected light power proportion which is obtained from the shared configuration unit and is jointly determined by a plurality of target attenuation values corresponding to the light paths meets the target relative power relation.
7. The method of claim 1, wherein the protection mechanism comprises triggering a calibration operation: inputting a calibration optical signal with preset optical characteristics into the injection optical path, wherein the calibration optical signal is a coherent state optical pulse with known average photon number; based on a measurement feedback result of the calibration optical signal, determining the comprehensive attenuation characteristic of the injection optical path in the current state; And calibrating the target attenuation value stored in the shared configuration unit according to the comprehensive attenuation characteristic.
8. The method of claim 1, wherein the plurality of control units comprises a first functional unit for determining and writing the target attenuation value to the shared configuration unit, and a second functional unit for performing the suitability check and the quantum task operation, wherein, And the shared configuration unit performs data synchronization with the first functional unit and the second functional unit through an inter-process communication mechanism.
9. A cooperative control apparatus for a variable optical attenuator disposed in an injection optical path of a coherent optical quantum computing system including an optical parametric oscillator, the variable optical attenuator being configured to adjust an optical power injected into the optical parametric oscillator, the apparatus comprising: The cooperative configuration module is used for storing a target attenuation value corresponding to the variable optical attenuator in a shared configuration unit so as to enable a plurality of control units which work cooperatively in the system to perform read-write access; The system comprises a shared configuration unit, a verification module, a system physical constraint module, a system measurement feedback signal-to-noise ratio module and a control module, wherein the shared configuration unit is used for carrying out quantum task operation on a coherent light quantum computing system, and the system physical constraint module is used for acquiring a target attenuation value from the shared configuration unit by a target control unit for carrying out the quantum task operation before carrying out the quantum task operation of the coherent light quantum computing system and carrying out suitability verification on the target attenuation value based on the system physical constraint associated with a quantum task stage to which the quantum task operation belongs; And the control module is used for executing the quantum task operation according to the target attenuation value through the target control unit if the suitability check is passed, suspending or stopping the quantum task operation if the suitability check is not passed, and triggering a preset protection mechanism.
10. A non-transitory machine readable medium storing computer instructions for causing a computer to perform the method of any one of claims 1 to 8.

Description

Cooperative control method of variable optical attenuator and related equipment Technical Field The invention relates to the technical field of light quantum computers, in particular to a cooperative control method of a variable light attenuator and related equipment. Background A Coherent light quantum computer, such as Coherent light Xin Ji (Coherent ISING MACHINE, CIM) based on an optical parametric oscillator (optical parametric oscillation, OPO) is a quantum computing device that utilizes Coherent evolution of light pulses to solve complex combinatorial optimization problems. In coherent light quantum computing systems, light pulses circulate on a loop formed by a fiber delay line, the evolution of which is regulated by precisely injected light fields (including power and phase). The variable optical attenuator (Variable Optical Attenuator, abbreviated as VOA) is used as a key executing device and is arranged in an injection optical path to precisely adjust the optical power level injected into the OPO, the power level directly influences the threshold characteristic of the OPO, the coherence time of the pulse and the signal-to-noise ratio of measurement feedback, and finally determines the solving success rate, the convergence speed and the result reliability of quantum computation. In the related art, a static and isolated control strategy is generally adopted for controlling a variable optical attenuator in a coherent light quantum computing system so as to realize the basic functions and safety of equipment, and the problems of poor cooperative control effect, poor adaptability of a control method and the like exist. In view of the above problems in the related art, no effective solution has been proposed at present. Disclosure of Invention The embodiment of the invention provides a cooperative control method and related equipment of a variable optical attenuator, which at least partially solve the problems of poor cooperative control effect and poor adaptability of the control method of the variable optical attenuator in the related technology. In order to solve the above-mentioned problems, an aspect of the embodiments of the present invention provides a cooperative control method of a variable optical attenuator, which is applied to a coherent optical quantum computing system including an optical parametric oscillator, and is disposed in an injection optical path of the system, and is used for adjusting optical power injected into the optical parametric oscillator, the method comprising: Storing a target attenuation value corresponding to the variable optical attenuator in a shared configuration unit so as to enable a plurality of control units working cooperatively in the system to perform read-write access; Before executing one quantum task operation of the coherent light quantum computing system, acquiring the target attenuation value from the shared configuration unit by a target control unit executing the quantum task operation, and performing suitability verification on the target attenuation value based on a system physical constraint associated with a quantum task stage to which the quantum task operation belongs, wherein the system physical constraint comprises one or more of a coherence time requirement of a quantum bit, a threshold characteristic of the optical parametric oscillator and a signal-to-noise ratio requirement of system measurement feedback; If the suitability check is passed, executing the quantum task operation according to the target attenuation value through the target control unit; if the suitability check is not passed, suspending or stopping the quantum task operation, and triggering a preset protection mechanism. In some of these embodiments, when the quantum task operation is a system initialization operation, the step of the target control unit performing the quantum task operation according to the target attenuation value includes: before the system initialization operation is started, the variable optical attenuator is configured into a first configuration state, wherein the optical attenuation corresponding to the first configuration state is smaller than the optical attenuation corresponding to the target attenuation value, and the first configuration state is a state of enabling injected light to pass through without attenuation or approximately without attenuation; The system initialization operation is executed, wherein the total duration from the configuration of the first configuration state to the execution of the system initialization operation is controlled within a preset time threshold; After the system initialization operation is completed, the variable optical attenuator is configured back to a second configuration state corresponding to the target attenuation value. In some of these embodiments, when the quantum task operation involves adjusting the injection optical power to a target optical power value, the step of the target control unit perfo