Optical switch parameter measurement device and method, and optical communication device

Abstract

The application discloses a kind of parameter measuring device of optical switch and method, optical communication equipment, it is related to optical switch measurement technical field, the parameter measuring device of optical switch includes optical path module, signal conditioning circuit, drive module, signal acquisition module and host computer;Optical path module converts optical signal into current signal;Signal conditioning circuit is conditioned as voltage signal and amplifies;Drive module provides driving signal and synchronous trigger signal;Signal acquisition module is based on trigger signal and collects voltage signal;Host computer calculates the performance parameter of optical switch according to voltage signal collected multiple times, and performance parameter at least includes two items in insertion loss, extinction ratio, switching time etc.;The technical scheme of the application can realize the one-key type measurement of the performance parameter such as insertion loss, extinction ratio, switching time, polarization dependent loss, insertion dependent loss and repeatability of optical switch, while reducing the measurement cost of optical switch, improve test efficiency and accuracy.

Description

Technical Field

[0001] This invention relates to the field of optical switch measurement technology, and particularly to a parameter measurement device and method for an optical switch, and an optical communication device. Background Technology

[0002] As a core component of optical communication networks and fiber optic sensing systems, optical switches are responsible for directing the rapid and precise switching of optical signal paths, and their performance directly determines the system's stability, speed, and capacity. However, a single parameter cannot comprehensively evaluate their performance; therefore, multi-parameter measurements of optical switches are necessary.

[0003] Traditional methods for measuring the performance parameters of optical switches have certain shortcomings and cannot meet the requirements for efficient and accurate measurement: First, optical switch measurement equipment is expensive, requiring the simultaneous configuration of multiple specialized instruments such as high-speed oscilloscopes and high-precision optical power meters; second, the operation process is cumbersome, requiring multiple connections to different instruments and manual operation and data recording, which is not only inefficient but also prone to introducing human error; third, the equipment has low integration, with each instrument operating independently and lacking a unified control and data interaction channel, making it impossible to achieve multi-parameter data correlation analysis and one-click automated measurement. Summary of the Invention

[0004] The main objective of this invention is to propose a parameter measurement device and method for optical switches, as well as optical communication equipment, which aims to achieve one-click measurement of performance parameters of optical switches such as insertion loss, extinction ratio, switching time, polarization-dependent loss, insertion-dependent loss, and repeatability, while reducing the measurement cost of optical switches and improving testing efficiency and accuracy.

[0005] To achieve the above objectives, the present invention provides a parameter measurement device for an optical switch, comprising:

[0006] An optical path module includes an optical signal generating unit and a photoelectric conversion unit. The output terminal of the optical signal generating unit is used to connect to the input terminal of an optical switch, and the input terminal of the photoelectric conversion unit is used to connect to the output terminal of the optical switch. The photoelectric conversion unit is used to convert the optical signal output by the optical signal generating unit into a current signal and then output it.

[0007] A signal conditioning circuit, wherein the input terminal of the signal conditioning circuit is connected to the output terminal of the photoelectric conversion unit, is used to condition the current signal into a voltage signal and amplify it before outputting it;

[0008] The driving module has a first output terminal and a second output terminal. The first output terminal is used to connect to an optical switch to provide a driving signal to the optical switch, and the second output terminal is used to output a trigger signal synchronized with the driving signal.

[0009] The signal acquisition module has a signal acquisition input terminal and a trigger signal input terminal. The signal acquisition input terminal is connected to the output terminal of the signal conditioning circuit and is used to acquire the voltage signal output by the signal conditioning circuit. The trigger signal input terminal is connected to the second output terminal of the drive module and is used to receive the trigger signal and trigger the acquisition of the voltage signal based on the trigger signal.

[0010] The host computer is communicatively connected to the signal acquisition module and is used to calculate the performance parameters of the optical switch based on the voltage signals acquired multiple times by the signal acquisition module. The performance parameters include at least two of the following: insertion loss, extinction ratio, switching time, polarization-dependent loss, insertion-dependent loss, and repeatability.

[0011] In one embodiment, the signal conditioning circuit includes:

[0012] An impedance matching circuit is provided, wherein the signal input terminal of the impedance matching circuit is connected to the signal output terminal of the photoelectric conversion unit, and is used to condition the current signal into a voltage signal for output.

[0013] An amplifier circuit is provided, wherein the signal input terminal of the amplifier circuit is connected to the signal output terminal of the impedance matching circuit, and the signal output terminal of the amplifier circuit is connected to the signal acquisition input terminal of the signal acquisition module, for amplifying the voltage signal and outputting it to the signal acquisition module;

[0014] A power supply circuit, wherein the power output terminal of the power supply circuit is connected to the power input terminal of the amplifier circuit, and is used to provide the amplifier circuit with operating voltage.

[0015] In one embodiment, the signal conditioning circuit further includes:

[0016] An inverting circuit is provided, wherein the signal input terminal of the inverting circuit is connected to the signal output terminal of the amplifier circuit, and the signal output terminal of the inverting circuit is connected to the signal acquisition input terminal of the signal acquisition module, for inverting the voltage signal output by the amplifier circuit.

[0017] In one embodiment, the amplification circuit includes a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, a first operational amplifier chip, a second operational amplifier chip, and a third operational amplifier chip;

[0018] The inverting circuit includes an eighth resistor, a ninth resistor, and a fourth operational amplifier chip;

[0019] The impedance matching circuit includes a tenth resistor;

[0020] Wherein, the first terminal of the first operational amplifier chip is connected to the first terminal of the first resistor and the first terminal of the second resistor; the second terminal of the first operational amplifier chip is connected to the second terminal of the first resistor and the first terminal of the fourth resistor; the third terminal of the first operational amplifier chip is connected to the first terminal of the tenth resistor and the signal output terminal of the photoelectric conversion unit; and the second terminal of the tenth resistor is grounded.

[0021] The first terminal of the second operational amplifier chip is connected to the second terminal of the second resistor and the first terminal of the third resistor, and the second terminal of the second operational amplifier chip is connected to the second terminal of the third resistor and the first terminal of the fifth resistor;

[0022] The first terminal of the third operational amplifier chip is connected to the second terminal of the fourth resistor and the first terminal of the sixth resistor; the second terminal of the third operational amplifier chip is connected to the second terminal of the fifth resistor and the first terminal of the seventh resistor; and the third terminal of the third operational amplifier chip is connected to the second terminal of the sixth resistor and the first terminal of the eighth resistor.

[0023] The first terminal of the fourth operational amplifier chip is connected to the second terminal of the eighth resistor and the first terminal of the ninth resistor, and the second terminal of the fourth operational amplifier chip is connected to the second terminal of the ninth resistor and the signal acquisition input terminal of the signal acquisition module.

[0024] In one embodiment, the signal conditioning circuit further includes:

[0025] A voltage clamping protection circuit, wherein the signal input terminal of the voltage clamping protection circuit is connected to the signal output terminal of the inverting circuit, and the signal output terminal of the voltage clamping protection circuit is connected to the signal input terminal of the signal acquisition module, for limiting the amplitude of the voltage signal input to the signal acquisition module; and / or

[0026] An impedance matching circuit is provided, wherein the signal input terminal of the impedance matching circuit is connected to the signal output terminal of the photoelectric conversion unit, and the signal output terminal of the impedance matching circuit is connected to the signal input terminal of the amplifier circuit, for adjusting the impedance matching between the photoelectric conversion unit and the amplifier circuit.

[0027] In one embodiment, the optical signal generating unit is a laser source with a wavelength of 1550 nanometers; and / or

[0028] The photoelectric conversion unit is a photodetector, and the response wavelength of the photodetector is not less than 800 nanometers and not greater than 1700 nanometers.

[0029] The present invention also proposes a parameter measurement method for an optical switch, used in the parameter measurement device for the optical switch as described above, wherein the parameter measurement method for the optical switch includes:

[0030] In response to the received measurement command, the voltage signal acquired by the signal acquisition module is acquired multiple times;

[0031] Based on the voltage signal acquired each time, the performance parameters of the optical switch are calculated to form multiple sets of parameter datasets; wherein, the performance parameters include at least two of the following: insertion loss, extinction ratio, switching time, polarization-dependent loss, insertion-dependent loss, and repeatability;

[0032] Each performance parameter in the multiple parameter datasets is analyzed separately.

[0033] In one embodiment, the performance parameters of the optical switch are calculated based on each acquired voltage signal to form multiple sets of parameter datasets; wherein, the performance parameters include at least two of the following: insertion loss, extinction ratio, switching time, polarization-dependent loss, insertion-dependent loss, and repeatability:

[0034] Based on the amplification factor of the signal conditioning circuit and the responsivity of the photoelectric conversion unit, the voltage signal value is converted into a corresponding optical power value;

[0035] Based on the converted optical power value, at least two of the following should be calculated: insertion loss, extinction ratio, switching time, polarization-dependent loss, insertion-dependent loss, and repeatability of the optical switch.

[0036] In one embodiment, the analysis of each performance parameter in the multiple sets of parameter datasets includes:

[0037] Calculate the mean and sample standard deviation for each performance parameter;

[0038] Based on the continuous probability distribution, calculate the confidence interval for each performance parameter;

[0039] If the calculated confidence interval is within a preset confidence interval, the error of the performance parameter corresponding to the calculated confidence interval is within a preset error range.

[0040] The present invention also proposes an optical communication device, including an optical switch and a parameter measuring device for the optical switch as described above.

[0041] The technical solution of this invention sets up an optical path module including an optical signal generation unit and a photoelectric conversion unit. The optical signal output by the optical signal generation unit is converted into a current signal by the photoelectric conversion unit after passing through an optical switch. The current signal is conditioned into a voltage signal by a signal conditioning circuit and amplified before being sent to the signal acquisition module. The driving module provides a driving signal to the optical switch to control its switching state, and simultaneously outputs a trigger signal to the signal acquisition module to ensure that the acquisition action is synchronized with the switching action. After receiving the trigger signal, the signal acquisition module acquires the voltage signal at the corresponding moment and uploads the acquired voltage signal to the host computer. Based on the voltage signals acquired multiple times, the host computer calculates at least two performance parameters including insertion loss, extinction ratio, switching time, polarization-dependent loss, insertion-dependent loss, and repeatability. This invention integrates an optical signal generation unit, a photoelectric conversion unit, a signal conditioning circuit, a drive module, a signal acquisition module, and a host computer into a single parameter measurement device. This replaces the need for separate high-speed oscilloscopes, optical power meters, and other instruments required in traditional methods, thus improving the integration of the parameter measurement device. Simultaneously, the drive module outputs a synchronous trigger signal while applying a drive signal to the optical switch, enabling the signal acquisition module to acquire voltage signals at critical moments of switch state switching. The host computer then automatically performs multi-parameter calculations, eliminating the need for manual intervention and achieving full automation from excitation and acquisition to analysis, significantly improving the level of automation. Furthermore, since all performance parameters are calculated based on the same synchronously acquired voltage signal, deviations introduced by multiple manual operations, instrument switching, or environmental fluctuations are avoided, ensuring the timing consistency and uniformity of test conditions among the performance parameters, thereby improving the consistency of measurement results. Therefore, this solution effectively meets the practical needs of optical switches in optical communication and fiber optic sensing systems for efficient, accurate, and multi-dimensional performance evaluation. Attached Figure Description

[0042] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0043] Figure 1 A schematic diagram of the circuit functional modules of an embodiment of the parameter measurement device for an optical switch provided by the present invention;

[0044] Figure 2 A schematic diagram of the circuit functional modules of an embodiment of the signal conditioning circuit provided by the present invention;

[0045] Figure 3 A circuit diagram of an embodiment of the signal conditioning circuit provided by the present invention;

[0046] Figure 4 A circuit diagram of an embodiment of the power supply circuit provided by the present invention;

[0047] Figure 5 A flowchart of an embodiment of the parameter measurement method for an optical switch provided by the present invention;

[0048] Figure 6 A flowchart of another embodiment of the parameter measurement method for an optical switch provided by the present invention;

[0049] Figure 7 This is a flowchart of yet another embodiment of the parameter measurement method for an optical switch provided by the present invention.

[0050] Explanation of icon numbers:

[0051] 100. Parameter measuring device for optical switches;

[0052] 10. Optical path module; 11. Optical signal generation unit; 12. Photoelectric conversion unit;

[0053] 20. Signal conditioning circuit; 21. Amplification circuit; 22. Power supply circuit; 23. Inverting circuit; 24. Voltage clamping protection circuit; 25. Impedance matching circuit;

[0054] 30. Driver module;

[0055] 40. Signal acquisition module;

[0056] 50. Host computer;

[0057] R1, first resistor; R2, second resistor; R3, third resistor; R4, fourth resistor; R5, fifth resistor; R6, sixth resistor; R7, seventh resistor; R8, eighth resistor; R9, ninth resistor; R10, tenth resistor;

[0058] U1, First operational amplifier chip; U2, Second operational amplifier chip; U3, Third operational amplifier chip; U4, Fourth operational amplifier chip;

[0059] D1, diode;

[0060] 200. Optical switch.

[0061] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0062] The technical solutions of the embodiments of the present invention 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 the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0063] As a core component of optical communication networks and fiber optic sensing systems, optical switches are responsible for directing the rapid and precise switching of optical signal paths, and their performance directly determines the system's stability, speed, and capacity. However, a single parameter cannot comprehensively evaluate their performance; therefore, multi-parameter measurements of optical switches are necessary.

[0064] Traditional methods for measuring the performance parameters of optical switches have certain shortcomings and cannot meet the requirements for efficient and accurate measurement: First, optical switch measurement equipment is expensive, requiring the simultaneous configuration of multiple specialized instruments such as high-speed oscilloscopes and high-precision optical power meters; second, the operation process is cumbersome, requiring multiple connections to different instruments and manual operation and data recording, which is not only inefficient but also prone to introducing human error; third, the equipment has low integration, with each instrument operating independently and lacking a unified control and data interaction channel, making it impossible to achieve multi-parameter data correlation analysis and one-click automated measurement.

[0065] To this end, the present invention proposes a parameter measurement device 100 for an optical switch, which aims to realize one-click measurement of performance parameters of the optical switch 200 such as insertion loss, extinction ratio, switching time, polarization-dependent loss, insertion-dependent loss and repeatability, while reducing the measurement cost of the optical switch 200 and improving testing efficiency and accuracy.

[0066] Please see Figure 1 In one embodiment of the present invention, the parameter measuring device 100 of the optical switch includes:

[0067] The optical path module 10 includes an optical signal generating unit 11 and a photoelectric conversion unit 12. The output end of the optical signal generating unit 11 is used to connect to the input end of the optical switch 200, and the input end of the photoelectric conversion unit 12 is used to connect to the output end of the optical switch 200. The photoelectric conversion unit 12 is used to convert the optical signal output by the optical signal generating unit 11 into a current signal and then output it.

[0068] The signal conditioning circuit 20 has its input terminal connected to the output terminal of the photoelectric conversion unit 12, and is used to condition the current signal into a voltage signal and amplify it before outputting it.

[0069] The driving module 30 has a first output terminal and a second output terminal. The first output terminal is used to connect to the optical switch 200 to provide a driving signal to the optical switch 200, and the second output terminal is used to output a trigger signal synchronized with the driving signal.

[0070] The signal acquisition module 40 has a signal acquisition input terminal and a trigger signal input terminal. The signal acquisition input terminal is connected to the output terminal of the signal conditioning circuit 20 and is used to acquire the voltage signal output by the signal conditioning circuit 20. The trigger signal input terminal is connected to the second output terminal of the drive module 30 and is used to receive the trigger signal and trigger the acquisition of the voltage signal based on the trigger signal.

[0071] The host computer 50 is connected to the signal acquisition module 40 and is used to calculate the performance parameters of the optical switch 200 based on the voltage signals acquired multiple times by the signal acquisition module 40. The performance parameters include at least two of the following: insertion loss, extinction ratio, switching time, polarization-dependent loss, insertion-dependent loss, and repeatability.

[0072] In this invention, the parameter measurement device 100 of the optical switch is used to measure the performance parameters of the optical switch 200. The optical switch 200 can be a magneto-optical switch, or other active or passive optical switches with similar optical path switching or modulation functions. This invention uses a magneto-optical switch as an example to illustrate its performance parameter measurement. The magneto-optical switch realizes optical path switching based on the magneto-optical effect. It controls the on / off state or path selection of light between different output ports by an external magnetic field. It is a core device of optical communication and fiber optic sensing systems, undertaking the function of fast and accurate switching of optical signal paths. Its switching speed affects the system response time, insertion loss and extinction ratio are related to signal transmission quality, and repeatability and polarization correlation characteristics restrict the long-term stable operation of the system and channel capacity. Therefore, its performance has a decisive effect on system stability, processing speed and information carrying capacity.

[0073] However, as mentioned earlier, a single performance parameter of a magneto-optical switch cannot comprehensively evaluate its performance. This is because each performance parameter reflects the device's performance under different operating dimensions. For example, switching time reflects dynamic response capability, insertion loss characterizes energy transfer efficiency, extinction ratio reflects channel isolation capability, and polarization-dependent loss reveals the sensitivity to the polarization state of the input light. Relying on a single performance parameter alone is insufficient to accurately determine the applicability of a magneto-optical switch under complex actual operating conditions. Therefore, it is necessary to conduct integrated multi-parameter measurements of magneto-optical switches. Traditional methods for measuring the performance parameters of magneto-optical switches have certain shortcomings, making it difficult to meet the requirements for efficient and accurate measurement: First, magneto-optical switch measurement equipment is expensive, requiring the simultaneous configuration of multiple specialized instruments such as high-speed oscilloscopes and high-precision optical power meters. The high-speed oscilloscope is used to capture the transient response of the magneto-optical switch at the microsecond or even nanosecond level, while the high-precision optical power meter is used to accurately measure the optical power level under different conditions. Second, the operation process is cumbersome, requiring multiple connections to different instruments and manual operation and data recording during the testing process, which is not only inefficient but also prone to introducing human error. Third, the equipment has low integration, with each instrument operating independently and lacking a unified control and data interaction channel, making it impossible to achieve multi-parameter data correlation analysis and one-click automated measurement.

[0074] The parameter measurement device 100 for the optical switch of the present invention includes an optical path module 10. The optical path module 10 is used to convert optical signals into current signals. The optical path module 10 may include an optical signal generation unit 11 and a photoelectric conversion unit 12. The optical signal generation unit 11 provides the optical signal for measurement, and the photoelectric conversion unit 12 converts the optical signal provided by the optical signal generation unit 11 into a current signal and outputs it to the signal conditioning circuit 20. Specifically, a laser source can be used as the optical signal generation unit 11, and a photodetector can be used as the photoelectric conversion unit 12. The laser source can be a laser source with a wavelength of 1550 nanometers, which is located in the C-band of optical fiber communication and has the characteristics of low loss and high compatibility, making it suitable for measuring optical switches 200 in most optical communication devices. The response wavelength of the photodetector is not less than 800 nanometers and not greater than 1700 nanometers, capable of covering multiple communication bands including O, E, S, C, and L, ensuring that the device has good versatility and adaptability.

[0075] The current signal output by the photoelectric conversion unit 12 is generally very weak because the incident light power is typically below the milliwatt level, and the responsivity of the photodetector is approximately 0.9 amperes per watt. Limited by physical mechanisms and device structure, the generated current is only at the microampere or even nanoampere level. To improve measurement accuracy, the parameter measurement device 100 of the optical switch of this invention also includes a signal conditioning circuit 20. The signal conditioning circuit 20 is used to condition the weak current signal output by the photoelectric conversion unit 12 into a voltage signal and amplify it before output. The signal conditioning circuit 20 is based on an instrumentation amplifier architecture, and the amplification circuit 21 used has a high common-mode rejection ratio, which can amplify the weak voltage signal and suppress ambient noise. The signal conditioning circuit 20 may also include an inverting circuit 23 and a voltage clamping protection circuit 24. The inverting circuit 23 ensures that the voltage signal is compatible with the input range of the analog-to-digital converter of the signal acquisition module 40, and the voltage clamping protection circuit 24 provides voltage clamping protection to prevent overvoltage at the input of the signal acquisition module 40 due to abnormal light power or circuit failure. The signal conditioning circuit 20 can realize four major functions: current-to-voltage conversion, signal amplification, level shifting, and input protection.

[0076] To achieve precise synchronous measurement of the magneto-optical switch switching process and to acquire the voltage signal, this invention also includes a drive module 30 and a signal acquisition module 40. The drive module 30 has a first output terminal and a second output terminal. The first output terminal is electrically connected to the magneto-optical switch and provides a drive signal to it. The second output terminal outputs a trigger signal synchronized with the drive signal to the signal acquisition module 40. This is because the optical path switching action of the magneto-optical switch is triggered by the drive signal, and its key performance parameters, such as switching time and extinction ratio, depend on the precise capture of the switching start time and subsequent steady-state optical power. If the acquisition time is not synchronized with the application time of the drive signal, timing misalignment will occur, affecting the accuracy of performance parameter calculations. By strictly synchronizing the trigger signal with the drive signal, it can be ensured that the signal acquisition module 40 starts acquisition within a preset time window after the drive signal is applied, thereby obtaining a voltage signal with a clear time reference. The signal acquisition module 40 has a signal acquisition input terminal and a trigger signal input terminal. The signal acquisition input terminal is connected to the output terminal of the signal conditioning circuit 20 and is used to acquire the voltage signal output by the signal conditioning circuit 20. The trigger signal input terminal is connected to the second output terminal of the drive module 30 and is used to receive the trigger signal output by the drive module 30 and initiate the acquisition of the voltage signal based on the trigger signal. In other words, the entire measurement process is uniformly coordinated by the drive module 30. The excitation of the optical signal, the state switching of the magneto-optical switch, and the acquisition of the voltage signal are all completed under synchronous timing control, so that the acquired voltage signal can truly reflect the optical power change process of the magneto-optical switch under different operating states.

[0077] In one embodiment, a waveform generator can be used as the driving module 30. The waveform generator can generate a precise and controllable driving signal to drive the magneto-optical switch to complete the specified switching action. At the same time, its internal logic can ensure that the synchronous trigger signal and the driving signal are strictly aligned in time.

[0078] In one embodiment, a microcontroller can be used as the signal acquisition module 40. The microcontroller has analog-to-digital conversion and external interrupt functions. It can start analog-to-digital conversion immediately after receiving a trigger signal, acquire the voltage signal from the signal conditioning circuit 20 at a high sampling rate, and temporarily store it in the internal memory, waiting to upload it to the host computer 50 for further processing.

[0079] Based on this, to calculate the performance parameters of the magneto-optical switch, the present invention also includes a host computer 50, which can be composed of a general-purpose computer or an embedded processor. The host computer 50 can communicate with the signal acquisition module 40 via, but is not limited to, a USB-to-serial module, to receive the voltage signal acquired by the signal acquisition module 40, and calculate the performance parameters of the magneto-optical switch based on the voltage signals acquired multiple times by the signal acquisition module 40. The performance parameters include at least two of the following: insertion loss, extinction ratio, switching time, polarization-dependent loss, temperature-dependent loss, and repeatability. Insertion loss refers to the degree of power attenuation of the optical signal when it passes through the magneto-optical switch in the on state; it is a key steady-state parameter for measuring the device's impact on optical signal transmission and directly determines the transmission distance of the optical signal. Extinction ratio refers to the ratio of the output optical power in the on state to the output optical power in the off state of the magneto-optical switch; it is a core steady-state parameter for measuring the device's signal isolation capability and determines the degree of signal crosstalk and the system signal-to-noise ratio. Switching time refers to the time required from the application of the driving signal until the output optical power of the magneto-optical switch rises to 90% of its stable value (conduction) or falls to 10% of its stable value (cutoff), reflecting the dynamic response speed of the magneto-optical switch. Polarization-dependent loss refers to the difference in transmission loss of the magneto-optical switch for optical signals with different polarization states, reflecting the device's sensitivity to changes in polarization state. Temperature-dependent loss refers to the fluctuation in the insertion loss of the magneto-optical switch when the ambient temperature changes, reflecting the stability of the device under different temperature conditions. Repeatability refers to the maximum change in insertion loss measured multiple times under the same conditions, reflecting the stability of the insertion loss after multiple switching operations; the smaller the fluctuation, the better the repeatability.

[0080] When it is necessary to measure the performance parameters of the magneto-optical switch, the signal output terminal of the optical signal generation unit 11 can be connected to the signal input terminal of the magneto-optical switch via an FC / PC optical fiber, and the signal input terminal of the photoelectric conversion unit 12 can be connected to the signal output terminal of the magneto-optical switch via an FC / PC optical fiber. The drive module 30 is implemented using a waveform generator. Its first output terminal is connected to the electrical interface of the magneto-optical switch to provide a drive signal, and its second output terminal continuously outputs a TTL trigger signal with the same frequency as the drive signal. The drive module 30 operates autonomously after power-on and is not controlled by the host computer 50. It continuously outputs the drive signal and the synchronous TTL trigger signal.

[0081] At the start of the measurement, the user issues a measurement command via the host computer 50. The measurement command is sent to the signal acquisition module 40, putting it into a ready state. In this state, the signal acquisition module 40 only initiates the response to the TTL trigger signal upon receiving the measurement command; if no measurement command is received, the signal acquisition module 40 will not start acquisition even if the TTL trigger signal is continuously present. Once in the ready state, the signal acquisition module 40 starts acquiring the voltage signal within a preset time window after the drive signal is applied upon receiving the rising edge of the next valid TTL trigger signal, and ignores subsequent trigger signals until the current acquisition cycle is completed, thereby avoiding duplicate or false triggering.

[0082] Meanwhile, the optical signal generated by the optical signal generating unit 11 is output to the photoelectric conversion unit 12 via the magneto-optical switch. The photoelectric conversion unit 12 converts the optical signal into a corresponding current signal. The current signal is conditioned and amplified by the signal conditioning circuit 20 to form a voltage signal adapted to the input range of the analog-to-digital converter. The signal acquisition module 40 acquires this voltage signal and uploads it to the host computer 50 via the communication interface. Based on the output optical power changes of the magneto-optical switch corresponding to the voltage signal acquired multiple times during the on-state, off-state, and state switching processes, the host computer 50 calculates at least two performance parameters, including insertion loss, extinction ratio, switching time, polarization-dependent loss, temperature-dependent loss, and repeatability.

[0083] The entire measurement process requires no manual intervention in switching instruments or recording data. The drive module 30 operates independently and continuously, providing drive and synchronous trigger signals; the signal acquisition module 40 only responds with a valid trigger and completes a single acquisition after the host computer 50 issues a measurement command, ensuring that each measurement corresponds to a complete switching action cycle. This transforms the traditionally decentralized, asynchronous, and manual measurement process into an integrated, synchronized, and automated complete testing cycle, improving measurement efficiency and result reliability.

[0084] In summary, the technical solution of the present invention includes an optical path module 10 comprising an optical signal generation unit 11 and a photoelectric conversion unit 12. The optical signal output by the optical signal generation unit 11 is converted into a current signal by the photoelectric conversion unit 12 after passing through the optical switch 200. The current signal is conditioned into a voltage signal by the signal conditioning circuit 20 and amplified before being sent to the signal acquisition module 40. The driving module 30 provides a driving signal to the optical switch 200 to control its switching state, and simultaneously outputs a trigger signal to the signal acquisition module 40 to ensure that the acquisition action is synchronized with the switching action. After receiving the trigger signal, the signal acquisition module 40 acquires the voltage signal at the corresponding moment and uploads the acquired voltage signal to the host computer 50. Based on the voltage signals acquired multiple times, the host computer 50 calculates at least two performance parameters, including insertion loss, extinction ratio, switching time, polarization-dependent loss, insertion-dependent loss, and repeatability. This invention integrates the optical signal generation unit 11, photoelectric conversion unit 12, signal conditioning circuit 20, drive module 30, signal acquisition module 40, and host computer 50 into a single parameter measurement device. This replaces the need for separate high-speed oscilloscopes, optical power meters, and other instruments required in traditional methods, thereby improving the integration of the parameter measurement device. Simultaneously, the drive module 30 outputs a synchronous trigger signal while applying a drive signal to the optical switch 200, enabling the signal acquisition module 40 to acquire voltage signals at critical moments of switch state switching. The host computer 50 then automatically performs multi-parameter calculations. The entire process requires no manual intervention, achieving full automation from excitation and acquisition to analysis, significantly improving the level of automation. Furthermore, since all performance parameters are calculated based on the same synchronously acquired voltage signal, deviations introduced by multiple manual operations, instrument switching, or environmental fluctuations are avoided, ensuring the timing consistency and test condition uniformity among performance parameters, thus improving the consistency of measurement results. Therefore, this solution effectively meets the practical needs of the optical switch 200 for efficient, accurate, and multi-dimensional performance evaluation in optical communication and fiber optic sensing systems.

[0085] like Figures 2 to 4 As shown, in one embodiment, the signal conditioning circuit 20 includes:

[0086] Impedance matching circuit 25, the signal input terminal of impedance matching circuit 25 is connected to the signal output terminal of photoelectric conversion unit 12, and is used to condition the current signal into a voltage signal for output.

[0087] Amplifier circuit 21 has its signal input terminal connected to the signal output terminal of impedance matching circuit 25, and its signal output terminal connected to the signal acquisition input terminal of signal acquisition module 40. It is used to amplify the voltage signal and output it to signal acquisition module 40.

[0088] The power supply circuit 22 has its power output terminal connected to the power input terminal of the amplifier circuit 21, and is used to provide the operating voltage to the amplifier circuit 21.

[0089] In this embodiment, the current signal output by the photoelectric conversion unit 12 is very weak, and its internal resistance is relatively high. If the current signal is directly input into the amplifier circuit 21, the signal transmission efficiency may decrease due to impedance mismatch, affecting the accuracy and stability of the final voltage signal. For example, when there is impedance mismatch between the photoelectric conversion unit 12 and the amplifier circuit 21, it may cause a decrease in signal amplitude and waveform distortion. This is particularly important when evaluating the switching characteristics of the magneto-optical switch, because any amplitude change or waveform distortion may lead to errors in the calculation of magneto-optical switch performance parameters such as switching time and insertion loss. By setting the impedance matching circuit 25, the current signal output by the photoelectric conversion unit 12 can be converted into a voltage signal and transmitted to the amplifier circuit 21. The purpose of this is to ensure that the current signal output by the photoelectric conversion unit 12 can be accurately received and processed by the amplifier circuit 21, thereby generating a voltage signal that accurately reflects the working state of the magneto-optical switch.

[0090] The power supply circuit 22 can provide a 3.3-volt operating voltage to the amplifier circuit 21. This voltage value is chosen to prevent excessively high voltage input to the signal acquisition module 40 from damaging it. Alternatively, the power supply circuit 22 can provide a 5.0-volt operating voltage to the amplifier circuit 21. This voltage value is chosen to optimize the dynamic range and signal swing of the operational amplifier chip in the selected amplifier circuit 21, fully utilizing its performance to effectively amplify weak voltage signals.

[0091] like Figures 2 to 4 As shown, in one embodiment, the signal conditioning circuit 20 further includes:

[0092] The inverting circuit 23 is connected to the signal output terminal of the amplifier circuit 21 and to the signal acquisition input terminal of the signal acquisition module 40. It is used to invert the voltage signal output by the amplifier circuit 21.

[0093] In this embodiment, the impedance matching circuit 25 outputs a weak voltage signal. This weak voltage signal is input to the amplifier circuit 21, which amplifies it using an inverting amplification structure. The inverting amplification structure is chosen because it offers higher gain stability and noise suppression when processing weak signals, thus improving signal conditioning accuracy. Due to the characteristics of the inverting amplification structure, the polarity of its output voltage signal is opposite to that of the input voltage signal; therefore, the amplified voltage signal is negative. The analog-to-digital converter of the signal acquisition module 40 is typically designed to receive positive voltage inputs. Directly inputting a negative voltage signal might exceed its effective input range, affecting acquisition accuracy and even causing signal distortion. Therefore, the inverting circuit 23 inverts the negative voltage signal output from the amplifier circuit 21 again, converting it to a positive voltage signal. This ensures that the original signal amplitude and timing characteristics remain unchanged, adapting it to the input requirements of the signal acquisition module 40, thereby guaranteeing the accuracy of subsequent multi-parameter measurements and the compatibility of the entire measurement device.

[0094] like Figures 2 to 4 As shown, in one embodiment, the signal conditioning circuit 20 further includes:

[0095] The voltage clamping protection circuit 24 has its signal input terminal connected to the signal output terminal of the inverting circuit 23 and its signal output terminal connected to the signal input terminal of the signal acquisition module 40. It is used to limit the amplitude of the voltage signal input to the signal acquisition module 40.

[0096] In this embodiment, the voltage clamping protection circuit 24 functions as a voltage clamping protection circuit to prevent the voltage signal input to the signal acquisition module 40 from being too high or too low. This design considers the dynamic characteristics of the magneto-optical switch in actual operation: during the switching process, the magneto-optical switch may experience brief abnormal fluctuations in output optical power due to factors such as drive signal overshoot, hysteresis effect, or transient reflection in the internal optical path; in addition, unexpected sudden changes in optical power may also occur under conditions such as changes in the test environment, unstable fiber optic connection, or device aging. After these abnormal optical powers are converted by the photoelectric conversion unit 12, they will generate current signals that exceed the normal range. After amplification and inversion, they may form voltage signals with excessively high or low amplitudes. If such voltage signals directly enter the signal acquisition module 40, they may not only saturate the analog-to-digital converter or cause it to enter the nonlinear region, resulting in distortion of the acquired voltage signal, thus affecting the accuracy of calculations of parameters such as insertion loss, extinction ratio, and switching time, but may also cause cumulative damage to the front-end circuit of the signal acquisition module 40. Therefore, by clamping the voltage through the voltage clamping protection circuit 24, the input signal can be constrained within the safe operating range of the signal acquisition module 40, thereby maintaining measurement accuracy while enhancing the adaptability of the entire device to various operating conditions of the magneto-optical switch.

[0097] like Figures 2 to 4 As shown, in one embodiment, the amplifier circuit 21 includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, a first operational amplifier chip U1, a second operational amplifier chip U2, and a third operational amplifier chip U3; the inverter circuit 23 includes an eighth resistor R8, a ninth resistor R9, and a fourth operational amplifier chip U4; the voltage clamping protection circuit 24 includes a diode D1; and the impedance matching circuit 25 includes a tenth resistor R10.

[0098] Wherein, the first terminal of the first operational amplifier chip U1 is connected to the first terminal of the first resistor R1 and the first terminal of the second resistor R2, the second terminal of the first operational amplifier chip U1 is connected to the second terminal of the first resistor R1 and the first terminal of the fourth resistor R4, the third terminal of the first operational amplifier chip U1 is connected to the first terminal of the tenth resistor R10 and the signal output terminal of the photoelectric conversion unit 12, and the second terminal of the tenth resistor R10 is grounded.

[0099] The first terminal of the second operational amplifier chip U2 is connected to the second terminal of the second resistor R2 and the first terminal of the third resistor R3. The second terminal of the second operational amplifier chip U2 is connected to the second terminal of the third resistor R3 and the first terminal of the fifth resistor R5.

[0100] The first terminal of the third operational amplifier chip U3 is connected to the second terminal of the fourth resistor R4 and the first terminal of the sixth resistor R6. The second terminal of the third operational amplifier chip U3 is connected to the second terminal of the fifth resistor R5 and the first terminal of the seventh resistor R7. The third terminal of the third operational amplifier chip U3 is connected to the second terminal of the sixth resistor R6 and the first terminal of the eighth resistor R8.

[0101] The first terminal of the fourth operational amplifier chip U4 is connected to the second terminal of the eighth resistor R8 and the first terminal of the ninth resistor R9. The second terminal of the fourth operational amplifier chip U4 is connected to the second terminal of the ninth resistor R9, the signal acquisition input terminal of the signal acquisition module 40, and the diode D1.

[0102] In this embodiment, the weak current signal output by the photoelectric conversion unit 12 first flows into the tenth resistor R10, which converts the weak current signal into a voltage signal. Simultaneously, the tenth resistor R10 matches the output characteristics of the photoelectric conversion unit 12, thus playing an impedance matching role to a certain extent, which helps improve the effective transmission of the weak signal from the high-output-impedance photoelectric conversion unit 12 to the amplifier circuit.

[0103] The first operational amplifier chip U1, the second operational amplifier chip U2, and the third operational amplifier chip U3, each connected to a resistor, form a multi-stage amplification structure. This structure provides sufficient gain to handle voltage signals corresponding to currents from nanoamps to microamps, while also possessing high common-mode rejection capability, effectively suppressing the influence of power supply fluctuations and environmental electromagnetic interference on the measurement results. Since each stage of the amplification uses an inverting configuration, the final output voltage signal is negative.

[0104] The analog-to-digital converter (ADC) of the signal acquisition module 40 is typically designed to receive positive voltage inputs. Directly inputting a negative voltage signal may exceed its effective input range, affecting acquisition accuracy and even causing waveform distortion. Therefore, an inverting circuit 23, consisting of the fourth operational amplifier chip U4, the eighth resistor R8, and the ninth resistor R9, is needed to invert the aforementioned negative voltage signal again, converting it into a positive voltage signal. This satisfies the input level polarity requirements of the signal acquisition module 40 while maintaining the original signal amplitude and timing characteristics.

[0105] A diode D1 is connected to the output of the inverting circuit 23 to implement clamping protection. When the output voltage exceeds the allowable input range of the signal acquisition module 40 due to transient switching of the magneto-optical switch, sudden change in optical power, or external abnormality, the diode D1 conducts, limiting the output voltage within a safe range, preventing damage to the front-end circuit of the signal acquisition module 40, and avoiding signal distortion caused by voltage saturation.

[0106] The present invention also proposes a parameter measurement method for an optical switch, which is used in the parameter measurement device 100 of the optical switch as described above. The specific structure of the parameter measurement device 100 of the optical switch is as described in the above embodiments. Since the parameter measurement method of the optical switch adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0107] Among them, such as Figure 1 and Figure 5 As shown, the parameter measurement method for this optical switch includes:

[0108] S100: In response to the received measurement command, acquire the voltage signal collected by the signal acquisition module multiple times;

[0109] S200. Based on the voltage signal acquired each time, calculate the performance parameters of the optical switch to form multiple sets of parameter datasets; among them, the performance parameters include at least two of the following: insertion loss, extinction ratio, switching time, polarization-dependent loss, insertion-dependent loss, and repeatability.

[0110] S300: Analyze each performance parameter in the multiple parameter datasets separately.

[0111] In this embodiment, the output of the optical signal generating unit 11 is connected to the input of the magneto-optical switch via an FC / PC optical fiber, and the output of the magneto-optical switch is connected to the input of the photoelectric conversion unit 12 via an FC / PC optical fiber; the first output of the driving module 30 is connected to the electrical interface of the magneto-optical switch to provide a driving signal, and the second output of the driving module 30 is connected to the trigger signal input of the signal acquisition module 40 to output a trigger signal synchronized with the driving signal; the output of the signal conditioning circuit 20 is connected to the signal acquisition input of the signal acquisition module 40 to send the amplified voltage signal into the signal acquisition module 40; the signal acquisition module 40 establishes a communication connection with the host computer 50 via a USB-to-serial port module.

[0112] After completing the physical connection, the host computer 50 is started, establishing communication with the signal acquisition module 40 and completing initialization. The number of measurements, n, is then set to improve the statistical reliability of the results and reduce the impact of random errors through repeated measurements. The host computer 50 then enters a standby state, waiting for the user to trigger a test command. When the user issues a measurement command, the host computer 50 sends a preparation command to the signal acquisition module 40, causing it to enter a waiting-to-trigger state. At this time, the drive module 30 is in continuous operation, its first output providing a periodic drive signal to the magneto-optical switch, and its second output synchronously outputting a TTL trigger signal with the same frequency as the drive signal. After receiving the preparation command, the signal acquisition module 40 only responds to the next valid TTL trigger signal, initiating a voltage signal acquisition when the trigger signal arrives, and ignoring subsequent trigger signals within this acquisition cycle, ensuring that each acquisition corresponds to a complete magneto-optical switch switching action. After acquisition, the signal acquisition module 40 uploads the acquired voltage signal to the host computer 50 via a USB-to-serial port module. After receiving the voltage signal, the host computer 50 determines whether the number of acquisitions completed so far has reached the preset number of measurements n. If not, it continues to send the next preparation command to the signal acquisition module 40, waiting for the next valid trigger signal to execute a new round of acquisition, until all n measurements are completed. After all acquisitions are completed, the host computer 50 performs batch processing on the voltage signals obtained from the n acquisitions, calculating the corresponding performance parameters for each measurement, including insertion loss, extinction ratio, and switching time, forming n sets of parameter datasets. Based on this, the host computer 50 calculates the mean and sample standard deviation for the n measured values ​​of each performance parameter, and calculates its 95% confidence interval based on the t-distribution. This confidence interval is used to more reasonably estimate the possible range of the true value of the parameter under limited sample conditions; the narrower the interval, the smaller the dispersion of the measurement results, the better the repeatability, and the higher the reliability. Finally, the host computer 50 presents the statistical results of various performance parameters in a graphical manner on the user interface, and automatically generates a test report containing key parameter values, confidence intervals and corresponding voltage waveforms for users to view, save or export, thereby realizing a fully integrated measurement process from hardware connection and synchronous acquisition to data analysis and report output.

[0113] like Figure 1 and Figure 6 As shown, in one embodiment, step S200 includes:

[0114] S210. Based on the amplification factor of the signal conditioning circuit and the responsivity of the photoelectric conversion unit, the voltage signal value is converted into the corresponding optical power value.

[0115] S220. Based on the converted optical power value, calculate at least two of the following: insertion loss, extinction ratio, switching time, polarization-dependent loss, insertion-dependent loss, and repeatability of the optical switch.

[0116] In this embodiment, the voltage signal value uploaded by the signal acquisition module 40 is first converted back into the corresponding optical power value based on the amplification factor determined by the resistor configuration in the signal conditioning circuit 20 and the responsivity of the photoelectric conversion unit 12.

[0117] The conversion process is based on the chain relationship of current-voltage-optical power: the photoelectric conversion unit 12 converts the incident optical power into current, and the current is converted into voltage and amplified by the signal conditioning circuit 20. Therefore, the accurate mapping from voltage to original optical power can be achieved by using the known responsivity and amplification factor.

[0118] Based on this, the various performance parameters are calculated as follows:

[0119] Insertion loss is obtained by comparing the optical power output by the optical signal generating unit 11 with the steady-state optical power output when the magneto-optical switch is in the conducting state. Both are expressed in decibels and milliwatts, and the difference between them is the insertion loss.

[0120] The extinction ratio is calculated from the ratio of the output optical power of the magneto-optical switch in the on state to the off state. The optical power is expressed in milliwatts, and the logarithm is taken as a decibel value. The specific formula is as follows: Where ER is the extinction ratio. and These represent the output optical power of the magneto-optical switch in the on and off states, respectively.

[0121] The switching time is divided into on-time switching time and off-time switching time: the on-time switching time is defined as the time required from the rising edge of the trigger signal output by the drive module 30 to the output optical power rising to 90% of the conduction steady-state value; the off-time switching time is defined as the time required from the falling edge of the trigger signal to the output optical power falling to 10% of the cutoff steady-state value. This time information is determined by the voltage waveform recorded by the signal acquisition module 40 under synchronous triggering.

[0122] The polarization-dependent loss is obtained by measuring the extreme value of the insertion loss of the magneto-optical switch under different input polarization states, specifically the difference between its maximum and minimum insertion loss.

[0123] To obtain temperature-related losses, the magneto-optical switch needs to be placed in a temperature-controlled environment, and its insertion loss needs to be measured at multiple set temperature points. Then, the change in loss with temperature needs to be calculated.

[0124] Repeatability is characterized by measuring the insertion loss of the magneto-optical switch multiple times under the same test conditions and calculating the standard deviation of the values. The smaller the standard deviation, the more stable the performance of the magneto-optical switch after multiple switching.

[0125] The above parameters are all calculated based on the same set of synchronously acquired voltage signals, which can ensure the time alignment and test condition consistency among multiple performance parameters, thereby improving the accuracy of the overall evaluation.

[0126] like Figure 1 and Figure 7 As shown, in one embodiment, step S300 includes:

[0127] S310. Calculate the mean and sample standard deviation for each performance parameter.

[0128] S320. Based on the continuous probability distribution, calculate the confidence interval for each performance parameter;

[0129] S330. When the calculated confidence interval is determined to be within a preset confidence interval, the error of the performance parameter corresponding to the calculated confidence interval is determined to be within a preset error range.

[0130] In this embodiment, after the host computer 50 completes the calculation of multiple sets of performance parameters, it first calculates the arithmetic mean and sample standard deviation of the multiple measurement results for each performance parameter to characterize the central tendency and dispersion of the performance parameter. Subsequently, based on the t-distribution model commonly used under small sample conditions, combined with the set confidence level (usually 95%), the confidence interval of each performance parameter is calculated. This confidence interval can reflect the range in which the true value of the parameter may be under the current number of measurements and data fluctuations. Since the magneto-optical switch has clear requirements for performance stability in practical applications, the allowable confidence intervals for each parameter can be preset as a judgment benchmark. When the calculated confidence interval is completely contained within the preset confidence interval, it can be considered that the measurement result of the performance parameter has sufficient repeatability and reliability, and its potential error does not exceed the preset error range allowed by the engineering. Otherwise, it indicates that there may be factors such as abnormality of the optical switch 200, environmental interference, or unstable fiber optic connection, which require further investigation or retesting. By introducing a confidence interval comparison mechanism, users can intuitively understand the reliability of the measurement results and make a decision on whether to accept the magneto-optical switch for use in optical communication equipment.

[0131] The present invention also proposes an optical communication device, which includes an optical switch 200 and a parameter measuring device 100 for the optical switch. The specific structure of the parameter measuring device 100 for the optical switch is as described in the above embodiments. Since the optical communication device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0132] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A parameter measuring device for an optical switch, characterized in that, include: An optical path module includes an optical signal generating unit and a photoelectric conversion unit. The output terminal of the optical signal generating unit is used to connect to the input terminal of an optical switch, and the input terminal of the photoelectric conversion unit is used to connect to the output terminal of the optical switch. The photoelectric conversion unit is used to convert the optical signal output by the optical signal generating unit into a current signal and then output it. A signal conditioning circuit, wherein the input terminal of the signal conditioning circuit is connected to the output terminal of the photoelectric conversion unit, is used to condition the current signal into a voltage signal and amplify it before outputting it; The driving module has a first output terminal and a second output terminal. The first output terminal is used to connect to an optical switch to provide a driving signal to the optical switch, and the second output terminal is used to output a trigger signal synchronized with the driving signal. The signal acquisition module has a signal acquisition input terminal and a trigger signal input terminal. The signal acquisition input terminal is connected to the output terminal of the signal conditioning circuit and is used to acquire the voltage signal output by the signal conditioning circuit. The trigger signal input terminal is connected to the second output terminal of the drive module and is used to receive the trigger signal and trigger the acquisition of the voltage signal based on the trigger signal. The host computer is communicatively connected to the signal acquisition module and is used to calculate the performance parameters of the optical switch based on the voltage signals acquired multiple times by the signal acquisition module. The performance parameters include at least two of the following: insertion loss, extinction ratio, switching time, polarization-dependent loss, insertion-dependent loss, and repeatability.

2. The parameter measuring device for the optical switch as described in claim 1, characterized in that, The signal conditioning circuit includes: An impedance matching circuit is provided, wherein the signal input terminal of the impedance matching circuit is connected to the signal output terminal of the photoelectric conversion unit, and is used to condition the current signal into a voltage signal for output. An amplifier circuit is provided, wherein the signal input terminal of the amplifier circuit is connected to the signal output terminal of the impedance matching circuit, and the signal output terminal of the amplifier circuit is connected to the signal acquisition input terminal of the signal acquisition module, for amplifying the voltage signal and outputting it to the signal acquisition module; A power supply circuit, wherein the power output terminal of the power supply circuit is connected to the power input terminal of the amplifier circuit, and is used to provide the amplifier circuit with operating voltage.

3. The parameter measuring device for the optical switch as described in claim 2, characterized in that, The signal conditioning circuit further includes: An inverting circuit is provided, wherein the signal input terminal of the inverting circuit is connected to the signal output terminal of the amplifier circuit, and the signal output terminal of the inverting circuit is connected to the signal acquisition input terminal of the signal acquisition module, for inverting the voltage signal output by the amplifier circuit.

4. The parameter measuring device for the optical switch as described in claim 3, characterized in that, The amplifier circuit includes a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, a first operational amplifier chip, a second operational amplifier chip, and a third operational amplifier chip; The inverting circuit includes an eighth resistor, a ninth resistor, and a fourth operational amplifier chip; The impedance matching circuit includes a tenth resistor; Wherein, the first terminal of the first operational amplifier chip is connected to the first terminal of the first resistor and the first terminal of the second resistor; the second terminal of the first operational amplifier chip is connected to the second terminal of the first resistor and the first terminal of the fourth resistor; the third terminal of the first operational amplifier chip is connected to the first terminal of the tenth resistor and the signal output terminal of the photoelectric conversion unit; and the second terminal of the tenth resistor is grounded. The first terminal of the second operational amplifier chip is connected to the second terminal of the second resistor and the first terminal of the third resistor, and the second terminal of the second operational amplifier chip is connected to the second terminal of the third resistor and the first terminal of the fifth resistor; The first terminal of the third operational amplifier chip is connected to the second terminal of the fourth resistor and the first terminal of the sixth resistor; the second terminal of the third operational amplifier chip is connected to the second terminal of the fifth resistor and the first terminal of the seventh resistor; and the third terminal of the third operational amplifier chip is connected to the second terminal of the sixth resistor and the first terminal of the eighth resistor. The first terminal of the fourth operational amplifier chip is connected to the second terminal of the eighth resistor and the first terminal of the ninth resistor, and the second terminal of the fourth operational amplifier chip is connected to the second terminal of the ninth resistor and the signal acquisition input terminal of the signal acquisition module.

5. The parameter measuring device for an optical switch as described in claim 3, characterized in that, The signal conditioning circuit further includes: A voltage clamping protection circuit is provided, wherein the signal input terminal of the voltage clamping protection circuit is connected to the signal output terminal of the inverting circuit, and the signal output terminal of the voltage clamping protection circuit is connected to the signal input terminal of the signal acquisition module, for limiting the amplitude of the voltage signal input to the signal acquisition module.

6. The parameter measuring device for the optical switch as described in any one of claims 1 to 5, characterized in that, The optical signal generating unit is a laser source with a wavelength of 1550 nanometers; and / or The photoelectric conversion unit is a photodetector, and the response wavelength of the photodetector is not less than 800 nanometers and not greater than 1700 nanometers.

7. A method for measuring the parameters of an optical switch, characterized in that, A parameter measuring device for an optical switch as described in any one of claims 1 to 3, wherein the parameter measuring method for the optical switch comprises: In response to the received measurement command, the voltage signal acquired by the signal acquisition module is acquired multiple times; Based on the voltage signal acquired each time, the performance parameters of the optical switch are calculated to form multiple sets of parameter datasets; wherein, the performance parameters include at least two of the following: insertion loss, extinction ratio, switching time, polarization-dependent loss, insertion-dependent loss, and repeatability; Each performance parameter in the multiple parameter datasets is analyzed separately.

8. The parameter measurement method for an optical switch as described in claim 7, characterized in that, Based on the voltage signal acquired each time, the performance parameters of the optical switch are calculated to form multiple sets of parameter datasets; wherein, the performance parameters include at least two of the following: insertion loss, extinction ratio, switching time, polarization-dependent loss, insertion-dependent loss, and repeatability: Based on the amplification factor of the signal conditioning circuit and the responsivity of the photoelectric conversion unit, the voltage signal value is converted into a corresponding optical power value; Based on the converted optical power value, at least two of the following should be calculated: insertion loss, extinction ratio, switching time, polarization-dependent loss, insertion-dependent loss, and repeatability of the optical switch.

9. The parameter measurement method for an optical switch as described in claim 7, characterized in that, The analysis of each performance parameter in the multiple parameter datasets includes: Calculate the mean and sample standard deviation for each performance parameter; Based on the continuous probability distribution, calculate the confidence interval for each performance parameter; If the calculated confidence interval is within a preset confidence interval, the error of the performance parameter corresponding to the calculated confidence interval is within a preset error range.

10. An optical communication device, characterized in that, Includes an optical switch and a parameter measuring device for the optical switch as described in any one of claims 1 to 6.

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