Optical path switching device and method

Abstract

The invention relates to the technical field of optical communication, and discloses an optical path switching device and method.The transmitting end array is provided with a plurality of transmitting ports arranged in the first direction; the receiving end array comprises a plurality of receiving ports arranged along a second direction; the regulation and control unit is arranged on a light path between the transmitting end array and the receiving end array, and comprises a plurality of electro-optical regulation and control modules which are sequentially arranged along a first direction; when the target voltage combination is applied to the electro-optical regulation and control module, the refractive index of the electro-optical regulation and control module forms specific refractive index distribution based on the target voltage combination, and the specific refractive index distribution is used for adjusting the propagation angle of the optical signal from the transmitting port in the second direction to the angle matched with the target receiving port. According to the invention, by pre-storing corresponding different target voltage combinations for different target receiving ports, the optical signals from the same transmitting port can be transmitted to the target receiving ports, so that the efficiency of optical path switching is improved.

Description

Technical Field

[0001] This invention relates to the field of optical communication technology, and more specifically to optical path switching devices and methods. Background Technology

[0002] With the rapid development of technologies such as the Internet, the Internet of Things, and artificial intelligence, global data traffic is experiencing explosive growth, placing higher demands on high-bandwidth, low-latency data exchange. Traditional interconnect architectures based on electrical switching are unable to meet these requirements, making optical switching technology a key direction for upgrading data centers and high-performance computing networks. The implementation of optical switching technologies typically relies on microelectromechanical systems (MEMS) or waveguide switches, which still have limitations in terms of switching speed, integration scale, and control precision. Therefore, improving the efficiency of optical path switching is a pressing issue that needs to be addressed. Summary of the Invention

[0003] In view of this, the present invention provides an optical path switching device and method to improve the efficiency of optical path switching.

[0004] In a first aspect, the present invention provides an optical path switching device, the device comprising: A transmitter array, wherein multiple transmitter ports are arranged along a first direction; A receiver array, the receiver array comprising a plurality of receiver ports arranged along a second direction; A control unit is disposed in the optical path between the transmitter array and the receiver array. The control unit includes multiple electro-optic control modules, which are arranged sequentially along a first direction. Each electro-optic control module is composed of one or more light-transmitting materials. When a target voltage combination is applied to the electro-optic control module, the refractive index of the electro-optic control module forms a specific refractive index distribution based on the target voltage combination. The specific refractive index distribution is used to adjust the propagation angle of the light signal from the transmitting port in the second direction to an angle that matches the target receiving port.

[0005] In one optional implementation, the target voltage combination includes a set of driving voltages applied to each electro-optic control module, with each driving voltage corresponding to one electro-optic control module.

[0006] In one alternative implementation, different combinations of the target voltages correspond to different propagation angles of the optical signal in the second direction; The optical path switching device stores a preset mapping relationship, which is used to characterize the correspondence between voltage combinations and receiving ports.

[0007] In one optional implementation, the electro-optic control module is equipped with an independent electrode, which is connected to an external driving circuit. The external driving circuit is used to output the target voltage combination based on a preset mapping relationship.

[0008] In one optional implementation, the receiver array has multiple receiver ports arranged in the second direction to form multiple parallel receiver channels. The control unit is used to transmit the optical signal emitted from any transmitting port in the transmitting array to any target channel among multiple receiving channels, wherein the target channel corresponds to the target receiving port.

[0009] In one optional embodiment, the light-transmitting material is a material with an electro-optic effect, including at least one of lithium niobate, silicon nitride, silicon, barium titanate, lithium tantalate, and lead zirconate titanate.

[0010] Secondly, the present invention provides an optical path switching method applied to the aforementioned optical path switching device, the method comprising: The target voltage combination corresponding to the target receiving port is determined based on a preset mapping relationship. The target voltage combination includes a set of driving voltages applied to multiple electro-optic control modules. The target voltage combination is applied to the electro-optic control module so that the refractive index of each electro-optic control module forms a specific refractive index distribution based on the corresponding driving voltage; After the optical signal from the transmitting port passes through the electro-optic modulation module with the specific refractive index distribution, its propagation direction is adjusted to match the angle of the target receiving port, thereby reaching the target receiving port.

[0011] In one optional implementation, the target voltage combination includes a set of driving voltages applied to each electro-optic control module, with each driving voltage corresponding to one electro-optic control module.

[0012] In one optional implementation, the preset mapping relationship is used to characterize the correspondence between voltage combinations and receiving ports, and is obtained through the following steps: Different combinations of test voltages are applied to the electro-optic control module; Detect and record the actual arrival of the optical signal at the receiving port under each test voltage combination; The mapping relationship between each test voltage combination and its corresponding receiving port is stored to form the preset mapping relationship.

[0013] In an optional implementation, the method further includes: when the target receiving port includes multiple physical ports, performing convergence processing or distribution processing on the optical signals received by the multiple physical ports.

[0014] The optical path switching device provided in this embodiment includes a transmitter array, a receiver array, and a control unit. The transmitter array has multiple transmitter ports arranged along a first direction; the receiver array has multiple receiver ports arranged along a second direction; the control unit is disposed in the optical path between the transmitter array and the receiver array, and the control unit includes multiple electro-optic control modules, which are arranged sequentially along the first direction. When a target voltage combination is applied to the electro-optic control module, the refractive index of the electro-optic control module forms a specific refractive index distribution based on the target voltage combination. This specific refractive index distribution is used to adjust the propagation angle of the optical signal from the transmitter port in the second direction to match the angle of the target receiver port. By pre-storing different target voltage combinations for different target receiver ports, this invention can realize the transmission of optical signals from the same transmitter port to the target receiver port, thereby improving the efficiency of optical path switching. Attached Figure Description

[0015] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of an optical path switching device according to an embodiment of the present invention; Figure 2 This is a schematic flowchart of an optical path switching method according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the hardware structure of an electronic device according to an embodiment of the present invention. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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 some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] With the rapid development of technologies such as the Internet, the Internet of Things, and artificial intelligence, global data traffic is experiencing explosive growth. To meet the demands for high bandwidth and low latency, optical switching technology is gradually being widely adopted. Optical switching technology enables efficient interconnection within and between data centers, improving network throughput and flexibility while reducing power consumption, making it an important choice for data center architecture upgrades. The implementation of optical switching technology typically relies on technologies such as microelectromechanical systems (MEMS) or waveguide switches, which still have limitations in terms of switching speed, integration scale, and control precision. Therefore, how to improve the efficiency of optical path switching is a pressing issue. Based on this, the present invention provides an optical path switching device and method.

[0019] This embodiment provides an optical path switching device, such as Figure 1 As shown, the optical path switching device includes a transmitter array, a receiver array, and a control unit. The transmitter array has multiple transmitter ports arranged along a first direction; the receiver array has multiple receiver ports arranged along a second direction; the control unit is disposed in the optical path between the transmitter array and the receiver array, and the control unit includes multiple electro-optic control modules, which are arranged sequentially along the first direction; each electro-optic control module is made of one or more light-transmitting materials; when a target voltage combination is applied to the electro-optic control module, the refractive index of the electro-optic control module forms a specific refractive index distribution based on the target voltage combination, and the specific refractive index distribution is used to adjust the propagation angle of the light signal from the transmitter port in the second direction to match the angle of the target receiver port.

[0020] The second-direction transmitter array includes multiple transmitter ports arranged linearly along the first and second directions, respectively. These transmitter ports can be laser diodes, laser emitters, etc., and can be used to transmit the optical signal to be exchanged. For example, such as... Figure 1 As shown, the horizontal direction is the X-axis, which can be considered the first direction, and the vertical direction is the Y-axis, which can be considered the second direction. In practical applications, the specific directions referred to by the first and second directions are not limited, nor is the angle formed between the first and second directions restricted. The transmission array includes multiple transmission ports. Suppose there are n transmission ports in a row of the transmission array, numbered sequentially from tx0 to tx(n-1) along the X-axis and from rx0 to rx(m-1) along the Y-axis.

[0021] The receiving array is used to receive optical signals that have been switched and guided thereto. It includes multiple receiving ports that are linearly arranged along a first direction and a second direction, respectively. The receiving ports can be optical signal receiving devices such as photodiodes and integrated photodetectors.

[0022] The control unit is used for optical signal transmission and is located in the region between the emitted light field of the transmitting array and the receiving surface of the receiving array. The control unit includes one or more electro-optic control modules, each of which is made of one or more light-transmitting materials. For example, such as... Figure 1 As shown, multiple electro-optic control modules are arranged sequentially along the X-axis. The light-transmitting material exhibits an electro-optic effect. By applying a combination of target voltages to the electro-optic control modules, the refractive index of the light-transmitting material can be changed, thereby altering the propagation direction and angle of the incident light signal, so that the light signal reaches the target receiving port in the receiving array.

[0023] In some alternative implementations, the target voltage combination includes a set of driving voltages applied to each electro-optic control module, with each driving voltage corresponding to one electro-optic control module.

[0024] Different target voltage combinations correspond to different propagation angles of the optical signal in the second direction; the optical path switching device stores a preset mapping relationship, which is used to characterize the correspondence between voltage combinations and receiving ports.

[0025] When it is necessary to transmit the optical signal from any transmitting port to the target receiving port, the external system control circuit applies a target voltage combination to the electro-optic modulation module. The target voltage combination includes the driving voltage applied to each electro-optic modulation module. The voltage combination corresponding to each receiving port can be pre-stored. After the target receiving port is determined, the corresponding target voltage combination is determined according to the preset mapping relationship; alternatively, the target voltage combination can be calculated in real time. Due to the electro-optic effect, the refractive index of the light-transmitting material in the electro-optic modulation module changes due to the driving voltage applied to it. The combination of each independently modulated refractive index forms a specific refractive index distribution. When the light beam passes through the modulation module to which the target voltage combination has been applied, the wavefront of the light beam will undergo specific phase modulation due to this equivalent refractive index distribution, thereby causing the entire light beam to deflect in the second direction and finally reach the target receiving port.

[0026] In some alternative embodiments, the light-transmitting material is a material with an electro-optic effect, including at least one of lithium niobate, silicon nitride, silicon, barium titanate, lithium tantalate, and lead zirconate titanate. The light-transmitting material may also be other light-transmitting materials that have a direct or indirect electro-optic effect.

[0027] The optical path switching device provided in this embodiment includes a transmitter array, a receiver array, and a control unit. The transmitter array has multiple transmitter ports arranged along a first direction; the receiver array has multiple receiver ports arranged along a second direction; the control unit is disposed in the optical path between the transmitter array and the receiver array, and the control unit includes multiple electro-optic control modules arranged sequentially along the first direction. When a target voltage combination is applied to the electro-optic control module, the refractive index of the electro-optic control module forms a specific refractive index distribution based on the target voltage combination. This specific refractive index distribution is used to adjust the propagation angle of the optical signal from the transmitter port in the second direction to match the angle of the target receiver port. By pre-storing different target voltage combinations for different target receiver ports, this invention can realize the transmission of optical signals from the same transmitter port to the target receiver port, thereby improving the efficiency of optical path switching.

[0028] In some alternative implementations, the electro-optic control module is equipped with an independent electrode, which is connected to an external driving circuit for outputting a target voltage combination based on a preset mapping relationship.

[0029] Each electro-optic control module is equipped with a corresponding independent electrode, which can be a metal electrode deposited on the surface of a light-transmitting material to create an electric field distribution within the material. The independent electrode can be connected to an external driving circuit, which receives commands from a controller specifying the transmitting port and target receiving port of the optical signal. A preset mapping relationship can be a lookup table or a function, including the receiving port and a specific set of voltage sequences (i.e., voltage combinations) for each independent electrode of each electro-optic control module within the control unit. By querying this mapping relationship, the corresponding target voltage combination is determined.

[0030] This specific embodiment adopts an independent electrode design, which enables the external driving circuit to apply a completely independent and precisely controllable driving voltage to each module, thereby driving each module in parallel. This avoids the timing delay caused by matrix addressing or time-division multiplexing, and helps to achieve an overall link switching time of nanosecond or even picosecond level.

[0031] Of course, those skilled in the art will understand that other electrode arrangements, such as grouped electrodes or matrix electrodes, may be used without departing from the core principle of controlling the refractive index distribution through voltage combinations, but their control freedom and system performance may be adjusted accordingly.

[0032] In some alternative implementations, the receiver array has multiple receiver ports arranged in the second direction to form multiple parallel receiver channels; the control unit is used to transmit the optical signal emitted by any transmitter port in the transmitter array to any target channel among the multiple receiver channels, and the target channel corresponds to the target receiver port.

[0033] The receiver ports arranged along the second direction in the receiver array constitute multiple parallel receiving channels, with the target receiving port serving as the entrance or logical identifier of the receiving channel. By adjusting the target voltage combination applied to the electro-optic control module, the emitted beam from the transmitting port can be deflected to different angles, thereby selectively entering different receiving channels.

[0034] According to an embodiment of the present invention, an embodiment of an optical path switching method is provided. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0035] This embodiment provides an optical path switching method, which can be used in the aforementioned optical path switching device. Figure 2 This is a flowchart of an optical path switching method according to an embodiment of the present invention, such as... Figure 2 As shown, the process includes the following steps: Step S201: Determine the target voltage combination corresponding to the target receiving port based on the preset mapping relationship.

[0036] The target voltage combination includes a set of driving voltages applied to multiple electro-optic control modules.

[0037] When a request is received to establish an optical path connection from a specific source transmitting port to a specific target receiving port, the control unit first queries a pre-stored mapping table based on the target receiving port identifier specified in the request. The preset mapping relationship is used to characterize the correspondence between voltage combinations and receiving ports.

[0038] The target voltage combination is the set of driving voltages that need to be applied to the electro-optic control module to achieve beam deflection to the target receiving port. The driving voltage can be a specific voltage amplitude, where each driving voltage corresponds to controlling an electro-optic control module composed of one or more light-transmitting materials arranged along the beam propagation direction.

[0039] Step S202: Apply a target voltage combination to the electro-optic control module so that the refractive index of each electro-optic control module forms a specific refractive index distribution based on the corresponding driving voltage.

[0040] In this process, the optical signal from the transmitting port passes through an electro-optic modulation module with a specific refractive index distribution, and its propagation direction is adjusted to match the angle of the target receiving port, thus reaching the target receiving port. (Target direction)

[0041] In some alternative implementations, the target voltage combination includes a set of driving voltages applied to each electro-optic control module, with each driving voltage corresponding to one electro-optic control module.

[0042] After determining the target voltage combination, the driving voltages in the target voltage combination are applied to the electro-optic control module through the driving circuit. The refractive index of the electro-optic control module forms a specific refractive index distribution based on the target voltage combination. The specific refractive index distribution is used to adjust the propagation angle of the light signal in the second direction to match the angle of the target receiving port.

[0043] In some optional implementations, a preset mapping relationship is used to characterize the correspondence between voltage combinations and receiving ports, which is obtained through the following steps: applying different test voltage combinations to the electro-optical control module; detecting and recording the actual receiving port reached by the optical signal under each test voltage combination; and storing the mapping relationship between each test voltage combination and the corresponding receiving port to form a preset mapping relationship.

[0044] Before executing the aforementioned optical path switching method, a process of establishing a preset mapping relationship is also included. During system power-on initialization or periodic calibration, the control drive circuit applies a preset combination of test voltages to the designated electro-optic modulation module. Each test voltage combination represents a specific voltage driving scheme used to attempt to generate a specific refractive index distribution. The location identifier of the physical receiving port actually reached by the test optical signal emitted from the corresponding transmitting port when each test voltage combination is applied is detected and recorded. All test voltage combinations are traversed, and the mapping relationship between each voltage combination and the receiving port is stored to form a preset mapping relationship, which is then stored.

[0045] In some alternative implementations, the method further includes: when the target receiving port includes multiple physical ports, performing convergence processing or distribution processing on the optical signals received by the multiple physical ports.

[0046] If the optical signal transmitted by the transmitter contains multiple information streams, and each physical port receives different wavelength components, an optical multiplexing device or optical combiner can be configured to converge and combine the optical signals from multiple physical ports within the port cluster. The converged optical signal can then be sent to a single high-speed photodetector for unified reception, or coupled into a single output optical fiber for long-distance transmission.

[0047] If the transmitter is emitting a single data stream of optical signal, signal aggregation can be omitted. In this case, the optical signal received by each physical port within the port cluster remains independent. Each independent signal can be converted into an electrical signal by its corresponding photodetector and then distributed to different processing units, servers, or network sub-nodes. This approach is suitable for implementing broadcast or multicast functions, or for providing data distribution for spatial parallel computing.

[0048] This optional implementation allows the optical path switching method and apparatus of the present invention to better adapt to diverse upper-layer application requirements. Through flexible port signal management, fine-grained scheduling and efficient utilization of optical bandwidth resources are achieved, enhancing the functional completeness and practical value of the entire optical interconnect system. Aggregation or distribution processing modes can be dynamically selected according to network management strategies or real-time service requirements, thereby achieving a balance between bandwidth, latency, and connection flexibility.

[0049] This invention also provides an electronic device having the above-described features. Figure 1 The optical path switching device shown.

[0050] Please see Figure 3 , Figure 3 This is a schematic diagram of the structure of an electronic device provided in an optional embodiment of the present invention, such as... Figure 3 As shown, the electronic device includes one or more processors 10, memory 20, and interfaces for connecting the components, including high-speed interfaces and low-speed interfaces. The components communicate with each other via different buses and can be mounted on a common motherboard or otherwise as required. The processors can process instructions executed within the electronic device, including instructions stored in or on memory to display graphical information of a GUI on external input / output devices (such as display devices coupled to the interfaces). In some alternative implementations, multiple processors and / or multiple buses can be used with multiple memories and multiple memory modules, if desired. Similarly, multiple electronic devices can be connected, each providing some of the necessary operations (e.g., as a server array, a group of blade servers, or a multiprocessor system). Figure 3 Take a processor 10 as an example.

[0051] Processor 10 may be a central processing unit, a network processor, or a combination thereof. Processor 10 may further include a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or a combination thereof. The programmable logic device may be a complex programmable logic device (CAMP), a field-programmable gate array (FPGA), a general-purpose array logic (GPA), or any combination thereof.

[0052] The memory 20 stores instructions executable by at least one processor 10 to cause the at least one processor 10 to perform the method shown in the above embodiments.

[0053] The memory 20 may include a program storage area and a data storage area. The program storage area may store the operating system and applications required for at least one function; the data storage area may store data created based on the use of the electronic device. Furthermore, the memory 20 may include high-speed random access memory and may also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid-state storage device. In some alternative embodiments, the memory 20 may optionally include memory remotely located relative to the processor 10, and these remote memories may be connected to the electronic device via a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

[0054] The memory 20 may include volatile memory, such as random access memory; the memory may also include non-volatile memory, such as flash memory, hard disk or solid-state drive; the memory 20 may also include a combination of the above types of memory.

[0055] The electronic device also includes a communication interface 30 for communicating with other devices or communication networks.

[0056] This invention also provides a computer-readable storage medium. The methods described above according to embodiments of the invention can be implemented in hardware or firmware, or implemented as computer code that can be recorded on a storage medium, or implemented as computer code downloaded via a network and originally stored on a remote storage medium or a non-transitory machine-readable storage medium and then stored on a local storage medium. Thus, the methods described herein can be processed by software stored on a storage medium using a general-purpose computer, a dedicated processor, or programmable or dedicated hardware. The storage medium can be a magnetic disk, optical disk, read-only memory, random access memory, flash memory, hard disk, or solid-state drive, etc.; further, the storage medium can also include combinations of the above types of memory. It is understood that computers, processors, microprocessor controllers, or programmable hardware include storage components capable of storing or receiving software or computer code, which, when accessed and executed by the computer, processor, or hardware, implements the methods shown in the above embodiments.

[0057] A portion of this invention can be applied as a computer program product, such as computer program instructions, which, when executed by a computer, can invoke or provide the methods and / or technical solutions according to the invention through the operation of the computer. Those skilled in the art will understand that the forms in which computer program instructions exist in a computer-readable medium include, but are not limited to, source files, executable files, installation package files, etc. Correspondingly, the ways in which computer program instructions are executed by a computer include, but are not limited to: the computer directly executing the instructions, or the computer compiling the instructions and then executing the corresponding compiled program, or the computer reading and executing the instructions, or the computer reading and installing the instructions and then executing the corresponding installed program. Here, the computer-readable medium can be any available computer-readable storage medium or communication medium accessible to a computer.

[0058] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and all such modifications and variations fall within the scope defined by the invention.

Claims

1. An optical path switching device, characterized in that, The device includes: A transmitter array, wherein multiple transmitter ports are arranged along a first direction; A receiver array, the receiver array comprising a plurality of receiver ports arranged along a second direction; A control unit is disposed in the optical path between the transmitter array and the receiver array. The control unit includes multiple electro-optic control modules, which are arranged sequentially along a first direction. Each electro-optic control module is composed of one or more light-transmitting materials. When a target voltage combination is applied to the electro-optic control module, the refractive index of the electro-optic control module forms a specific refractive index distribution based on the target voltage combination. The specific refractive index distribution is used to adjust the propagation angle of the light signal from the transmitting port in the second direction to an angle that matches the target receiving port.

2. The optical path switching device according to claim 1, characterized in that, The target voltage combination includes a set of driving voltages applied to each electro-optic control module, with each driving voltage corresponding to one electro-optic control module.

3. The optical path switching device according to claim 2, characterized in that, Different combinations of the target voltages correspond to different propagation angles of the optical signal in the second direction; The optical path switching device stores a preset mapping relationship, which is used to characterize the correspondence between voltage combinations and receiving ports.

4. The optical path switching device according to claim 3, characterized in that, The electro-optic control module is equipped with an independent electrode, which is connected to an external driving circuit. The external driving circuit is used to output the target voltage combination based on a preset mapping relationship.

5. The optical path switching device according to claim 1, characterized in that, The receiver array has multiple receiver ports arranged in the second direction, which constitute multiple parallel receiver channels. The control unit is used to transmit the optical signal emitted from any transmitting port in the transmitting array to any target channel among multiple receiving channels, wherein the target channel corresponds to the target receiving port.

6. The optical path switching device according to claim 1, characterized in that, The light-transmitting material is a material with an electro-optic effect, including at least one of lithium niobate, silicon nitride, silicon, barium titanate, lithium tantalate, and lead zirconate titanate.

7. An optical path switching method, characterized in that, The method, applied to the optical path switching apparatus according to any one of claims 1 to 6, comprises: The target voltage combination corresponding to the target receiving port is determined based on a preset mapping relationship. The target voltage combination includes a set of driving voltages applied to multiple electro-optic control modules. The target voltage combination is applied to the electro-optic control modules so that the refractive index of each electro-optic control module forms a specific refractive index distribution based on the corresponding driving voltage; after the light signal from the transmitting port passes through the electro-optic control module with the specific refractive index distribution, its propagation direction is adjusted to an angle that matches the target receiving port, thereby reaching the target receiving port.

8. The method according to claim 7, characterized in that, The target voltage combination includes a set of driving voltages applied to each electro-optic control module, with each driving voltage corresponding to one electro-optic control module.

9. The method according to claim 7, characterized in that, The preset mapping relationship is used to characterize the correspondence between voltage combinations and receiving ports, and is obtained through the following steps: Different combinations of test voltages are applied to the electro-optic control module; Detect and record the actual arrival of the optical signal at the receiving port under each test voltage combination; The mapping relationship between each test voltage combination and its corresponding receiving port is stored to form the preset mapping relationship.

10. The method according to claim 7, characterized in that, The method further includes: when the target receiving port includes multiple physical ports, performing convergence processing or distribution processing on the optical signals received by the multiple physical ports.

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