Detection device for transmitting end and receiving end of optical module

Abstract

The utility model discloses a detection device for a transmitting end and a receiving end of an optical module, relates to the technical field of photoelectrons, and solves the problems of single performance and inconsistent test conditions in the conventional detection device. The optical power and the signal wavelength are accurately measured through the optical power measuring module and the wavelength testing module; the same optical signal is distributed to a plurality of detection devices through an optical signal distributor, the signal quality is evaluated through an error rate analysis module, the signal integrity and stability are analyzed through an eye diagram analysis module, and environment interference factors are monitored through a temperature and environment monitoring module. The control and data processing unit is used for coordinating the work of each module and providing a user interface, the seamless integration and data exchange between the detection device and different external systems are ensured through the communication interface module, and stable electric energy is provided through the power supply circuit; according to the utility model, the consistency and the flexibility of the detection device for the transmitting end and the receiving end of the existing optical module are greatly improved.

Description

Technical Field

[0001] The utility model relates to the field of optoelectronic technology, and more specifically to a detection device for a transmitting end and a receiving end of an optical module. Background Art

[0002] With the rapid development of information technology, fiber-optic communication has become the cornerstone of modern communication networks due to its advantages such as high bandwidth, long-distance transmission and anti-electromagnetic interference. As a key component in the fiber-optic communication system, the optical module carries the important task of photoelectric conversion. With the explosive growth of data volume today, the requirements for the performance of optical modules are becoming increasingly stringent, which not only affects the stability and reliability of data transmission, but also affects the efficiency and security of the entire communication network. Therefore, the development of a device that can accurately detect the performance of the transmitter and receiver of the optical module is crucial to ensure the efficient operation of the fiber-optic communication network.

[0003] At present, the detection devices of optical modules mainly include optical power meters, bit error rate testers, spectrum analyzers, etc. These devices can perform basic tests on the transmission power, receiving sensitivity, spectral characteristics, etc. of optical modules. However, as optical modules develop towards higher speeds and smaller sizes, traditional detection devices have gradually exposed some limitations. For example, they may not meet the testing requirements of high-speed optical modules, or have problems with the compatibility of miniaturized optical modules. In addition, existing detection devices also have shortcomings in terms of multi-functional integration, automated testing, and real-time data analysis. These problems have restricted the development and application of optical module detection technology to a certain extent.

[0004] Although the existing technology has made certain progress, it still has some shortcomings. First, the existing devices can only measure optical power but cannot evaluate other important indicators, such as wavelength, bit error rate, etc. This leads to an incomplete evaluation of the overall performance of the optical module and an inability to fully understand its performance under different working conditions. Secondly, the existing devices cannot effectively monitor and control the impact of environmental factors during the test process. Environmental factors such as temperature and humidity have an important impact on the performance of optical modules, and the existing devices lack the corresponding environmental monitoring and control functions, which greatly reduces the reliability and repeatability of the test results; in addition, when processing high-speed, large-capacity optical modules, the existing devices may experience a decrease in accuracy and cannot accurately reflect the actual performance of the optical modules.

[0005] Therefore, the utility model discloses a detection device for a transmitting end and a receiving end of an optical module. Utility Model Content

[0006] The purpose of the present invention is to design a detection device for a transmitting end and a receiving end of an optical module to solve the problems of single performance and inconsistent test conditions existing in existing devices.

[0007] In order to achieve the above technical effects, the utility model adopts the following technical solutions:

[0008] A detection device for a transmitting end and a receiving end of an optical module, comprising:

[0009] Optical power measurement module, used to accurately measure the optical power at the transmitting end of the optical module;

[0010] The wavelength test module is used to measure the central wavelength of the optical signal emitted by the optical module;

[0011] Bit error rate analysis module, used to evaluate the signal quality at the receiving end and measure the bit error rate;

[0012] Eye diagram analysis module, used to generate eye diagrams and analyze signal integrity and stability;

[0013] Temperature and environment monitoring module, used to monitor environmental interference factors and ensure consistency of test conditions;

[0014] Control and data processing unit, used to coordinate the work of each module, process data and provide a user interface;

[0015] A communication interface module, used to realize data exchange between the detection device and the external system;

[0016] A power circuit for providing electrical energy;

[0017] The optical power measurement module and the wavelength test module are connected to the transmitting end of the optical module through an optical fiber jumper; the bit error rate analysis module and the eye diagram analysis module are connected to the receiving end of the optical module through an optical signal distributor for analyzing the received signal; the control and data processing unit is connected to all modules through an internal bus; and the communication interface module provides external connection through a universal serial bus.

[0018] As a further description of the above technical solution:

[0019] The input port of the optical signal distributor is connected to the receiving end of the optical module, and the output port of the optical signal distributor is respectively connected to the bit error rate analysis module and the eye diagram analysis module, so as to allow the same optical signal to be distributed to multiple detection devices.

[0020] As a further description of the above technical solution:

[0021] The optical power measurement module includes a light detector, a signal amplifier, an analog-to-digital converter and a microcontroller; the light detector is connected to the signal amplifier through a cable; the output end of the signal amplifier is electrically connected to the input end of the analog-to-digital converter; the output end of the analog-to-digital converter is electrically connected to the input end of the microcontroller.

[0022] As a further description of the above technical solution:

[0023] The wavelength test module is composed of a tunable laser, a signal processor, a control unit, a user interface and a storage unit; the tunable laser is electrically connected to the signal processor via a data line; the signal processor is connected to the user interface and the storage unit via a universal data bus; the control unit is connected to the tunable laser via a control signal line RS-485.

[0024] As a further description of the above technical solution:

[0025] The tunable laser is composed of a gain medium, a diffraction grating, a resonant cavity, a control circuit, a monitoring device, an optical isolator and a power supply; the gain medium is composed of an optical fiber; the gain medium is placed in the resonant cavity as a source of laser light; the input end of the diffraction grating is connected to the output end of the gain medium to select light of a specific wavelength for amplification; the resonant cavity is composed of three reflectors, which are arranged around the periphery of the gain medium to form a closed optical path; the control circuit is integrated into the laser package through a cable and connected to the gain medium and the diffraction grating; the monitoring device includes an optical power meter and a wavelength meter; the monitoring device is connected to the output end of the laser through an optical fiber; the optical isolator is placed at the output end of the laser to prevent reflected light from returning to the laser; the power supply is connected to various components inside the laser through a cable.

[0026] As a further description of the above technical solution:

[0027] The eye diagram analysis module is composed of a programmable gate array FPGA, a signal conditioning circuit, a data storage device and a communication interface; the input port of the signal conditioning circuit is connected to the photodetector; the output ports of the signal conditioning circuit and the communication interface are electrically connected to the input port of the programmable gate array FPGA; the data storage device is electrically connected to the programmable gate array FPGA; and the communication interface outputs data through a USB interface.

[0028] As a further description of the above technical solution:

[0029] The signal conditioning circuit is composed of an amplifier, a filter, an equalizer, an attenuator, an impedance matching circuit and a DC bias circuit; the output port of the amplifier is connected to the input port of the filter; the output port of the filter is connected to the input port of the equalizer; the output port of the equalizer is connected to the input port of the attenuator; the output port of the attenuator is connected to the input port of the impedance matching circuit; the output port of the impedance matching circuit is connected to the input port of the DC bias circuit; the output port of the DC bias circuit is connected to the input port of the analog-to-digital converter.

[0030] As a further description of the above technical solution:

[0031] The communication interface module uses RS-485 communication protocol to exchange data with the external system.

[0032] Positive beneficial effects:

[0033] In summary, due to the adoption of the above technical solutions, the beneficial effects of the utility model are as follows: the utility model integrates optical power measurement, wavelength testing, bit error rate analysis and eye diagram analysis functional modules, which can comprehensively evaluate the transmission and receiving end performance of the optical module, rather than being limited to the detection of a single indicator, thereby improving the comprehensiveness and accuracy of the test. In addition, the temperature and environment monitoring module is introduced, which can monitor environmental interference factors in real time and ensure the consistency of the test conditions, thereby improving the reliability and repeatability of the test results. Secondly, the control and data processing unit is responsible for coordinating the work of each module, processing data, and providing a user interface, making the operation more convenient and intuitive, and reducing the threshold for use and the cost of learning. The communication interface module provides a data exchange function with an external system, and can share and communicate data with other systems, thereby enhancing the scalability and interoperability of the device. In addition, a modular design is adopted, and each functional module is connected by an optical fiber jumper or an optical signal distributor, which makes the assembly, maintenance and upgrading of the device more convenient, and also improves the flexibility and customizability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor, among which:

[0035] Figure 1 It is a framework diagram of the utility model;

[0036] Figure 2 This is a structural schematic diagram of the optical power measurement module of the utility model;

[0037] Figure 3 This is a schematic diagram of the wavelength test module principle of the utility model;

[0038] Figure 4 This is a schematic diagram of the structure of the tunable laser of the utility model;

[0039] Figure 5 This is a schematic diagram of the structure of the eye diagram analysis module of the utility model;

[0040] Numbers in the figure: 1, optical power measurement module; 2, wavelength test module; 3, bit error rate analysis module; 4, eye diagram analysis module; 5, temperature and environment monitoring module; 6, control and data processing unit; 7, communication interface module; 8, power supply circuit; 9, optical signal distributor; 101, photodetector; 102, signal amplifier; 103, analog-to-digital converter; 104, microcontroller; 201, tunable laser; 202, signal processor; 203, control unit; 204, user interface; 205, storage unit; 211, gain medium; 212, diffraction grating; 213, resonant cavity; 214, control circuit; 215, monitoring equipment; 216, optical isolator; 217, power supply; 401, programmable gate array FPGA; 402, signal conditioning circuit; 403, data storage device; 404, communication interface. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this utility model.

[0042] like Figure 1-Figure 5 As shown, a detection device for a transmitting end and a receiving end of an optical module comprises: an optical power measurement module 1, which is used to accurately measure the optical power of the transmitting end of the optical module;

[0043] Wavelength test module 2, used to measure the central wavelength of the optical signal emitted by the optical module;

[0044] The bit error rate analysis module 3 is used to evaluate the signal quality of the receiving end and measure the bit error rate;

[0045] Eye diagram analysis module 4, used to generate eye diagrams and analyze signal integrity and stability;

[0046] Temperature and environment monitoring module 5, used to monitor environmental interference factors and ensure the consistency of test conditions;

[0047] Control and data processing unit 6, used to coordinate the work of each module, process data and provide a user interface;

[0048] Communication interface module 7, used to realize data exchange between the detection device and the external system;

[0049] A power circuit 8, for providing electrical energy;

[0050] The optical power measurement module 1 and the wavelength test module 2 are connected to the transmitting end of the optical module through an optical fiber jumper; the bit error rate analysis module 3 and the eye diagram analysis module 4 are connected to the receiving end of the optical module through an optical signal distributor 9 for analyzing the received signal; the control and data processing unit 6 is connected to all modules through an internal bus; the communication interface module 7 provides external connection through a universal serial bus.

[0051] In a specific embodiment, the optical power measurement module 1 converts the optical signal into an electrical signal based on the principle of photoelectric conversion, and determines the size of the optical power by measuring the amplitude of the electrical signal. The wavelength test module 2 uses the principle of spectral analysis to determine the central wavelength of the optical signal by measuring the wavelength change when the optical signal passes through a specific medium or structure. The bit error rate analysis module 3 calculates the bit error rate by comparing the received signal with the expected reference signal, reflecting the transmission quality of the signal. The eye diagram analysis module 4 analyzes the timing stability and noise tolerance of the signal by observing the eye diagram of the signal on an oscilloscope. The temperature and environment monitoring module 5 uses temperature and humidity sensors to monitor environmental parameters to ensure the consistency of test conditions. The control and data processing unit 6 coordinates the work of each module through software algorithms, processes the collected data, and provides test results. The communication interface module 7 uses existing communication standards and protocols to realize data exchange between the detection device and the external system. The power supply circuit 8 provides a stable power supply for the entire detection device to ensure the normal operation of each module.

[0052] The specific implementation process is as follows:

[0053] 1. Connect the transmitting end of the optical module to the optical power measurement module 1, and the receiving end to the bit error rate analysis module 3 and the eye diagram analysis module 4.

[0054] 2. Start the wavelength test module 2 to measure the wavelength of the emitted optical signal.

[0055] 3. At the same time, the temperature and environment monitoring module 5 monitors and records the temperature and humidity of the test environment.

[0056] 4. The control and data processing unit 6 coordinates the testing process of each module and collects data.

[0057] 5. The communication interface module 7 is ready to transfer data to the external system after the test is completed.

[0058] 6. The power circuit 8 supplies power to the entire system to ensure stability during the test.

[0059] 7. The user starts the test through the user interface of the control and data processing unit 6 and monitors the test process.

[0060] In specific implementation, the high-precision measurement module ensures accurate measurement of optical power and wavelength, improving the credibility of test results. Bit error rate and eye diagram analysis provide in-depth understanding of signal integrity and stability, helping to quickly identify problems. Real-time environmental monitoring reduces the impact of environmental changes on test results and improves test reliability. The integrated user interface and control unit simplify the test process and reduce operational complexity. The communication interface module supports data exchange with external systems, facilitating data integration and remote monitoring. The stable power supply circuit ensures the continuity and stability of long-term testing.

[0061] In the above embodiment, the input port of the optical signal distributor 9 is connected to the receiving end of the optical module, and the output port of the optical signal distributor 9 is respectively connected to the bit error rate analysis module 3 and the eye diagram analysis module 4, so as to allow the same optical signal to be distributed to multiple detection devices.

[0062] In a specific embodiment, the optical signal distributor 9 is based on the principle of optical power distribution. It uses optical coupler or optical splitter technology to copy or split the received optical signal, so that the same optical signal can be distributed to multiple detection devices. Such a design allows parallel processing of optical signals without multiple measurements of the original signal. In a detection device of an optical module transmitting end and a receiving end, the receiving end of the optical module is connected to the input port of the optical signal distributor 9 through an optical fiber jumper. The optical signal distributor 9 receives the optical signal from the optical module and distributes the signal to multiple output ports through an internal optical splitter. The output port of the distributor is connected to the bit error rate analysis module 3 and the eye diagram analysis module 4 respectively through an optical fiber jumper. Then, the bit error rate analysis module 3 and the eye diagram analysis module 4 receive the distributed optical signal and start corresponding signal detection and analysis. The control and data processing unit 6 receives data from the bit error rate analysis module 3 and the eye diagram analysis module 4, and performs further processing and analysis. Finally, the processed data is output to an external system or displayed on a user interface through a communication interface module 7.

[0063] In specific implementation, the optical signal distributor 9 allows multiple modules to detect the same signal at the same time, which greatly improves the efficiency of the test process. Through signal distribution, multiple connections and disconnections to the receiving end of the optical module are avoided, and the operation and resource consumption of the equipment are reduced. Since multiple modules analyze the same optical signal, the consistency and comparability of the test results are guaranteed. In addition, the optical signal distributor 9 provides flexibility and can connect more detection devices or modules as needed. Secondly, it avoids configuring an optical module separately for each detection module, saving costs. At the same time, parallel processing reduces test time, reduces test errors caused by signal changes, and improves test accuracy. If it is necessary to add additional test modules, the optical signal distributor 9 can easily expand the output port to adapt to new test requirements.

[0064] In the above embodiment, the optical power measurement module 1 includes a light detector 101, a signal amplifier 102, an analog-to-digital converter 103 and a microcontroller 104; the light detector 101 is connected to the signal amplifier 102 through a cable; the output end of the signal amplifier 102 is electrically connected to the input end of the analog-to-digital converter 103; the output end of the analog-to-digital converter 103 is electrically connected to the input end of the microcontroller 104.

[0065] In a specific embodiment, the optical power measurement module 1 converts the received optical signal into an electrical signal through the optical detector 101 based on the principle of photoelectric conversion. The signal amplifier 102 enhances the electrical signal to adapt to the input range of the analog-to-digital converter 103. The analog-to-digital converter 103 converts the enhanced analog electrical signal into a digital signal, and the microcontroller 104 processes the digital signal to calculate the optical power. The specific implementation process is as follows:

[0066] u1. Optical signal reception: The optical signal emitted by the transmitting end of the optical module is transmitted to the optical detector 101 of the optical power measurement module 1 through the optical fiber.

[0067] u2. Photoelectric conversion: The photodetector 101 receives the optical signal and converts it into a corresponding electrical signal.

[0068] u3. Signal amplification: The signal amplifier 102 receives the electrical signal and amplifies it to ensure that the signal strength is sufficient to be accurately measured by the analog-to-digital converter 103.

[0069] u4. Analog-to-digital conversion: The analog-to-digital converter 103 samples the amplified electrical signal and converts it into a digital signal.

[0070] u5. Data processing: The microcontroller 104 receives the digital signal and uses an algorithm to calculate the optical power value.

[0071] u6. Result display: The microcontroller 104 displays the calculated optical power value on the user interface and sends it to an external system or storage device through the communication interface module 7.

[0072] In a specific implementation, the combination of the light detector 101 and the signal amplifier 102 ensures that even weak optical signals can be accurately converted and measured. The analog-to-digital converter 103 converts analog signals into digital signals, which facilitates the microcontroller 104 to perform accurate digital processing. In addition, the microcontroller 104 not only processes data, but also displays the measurement results in real time, and realizes data sharing through the communication interface module 7. Secondly, the design of the user interface enables the operator to easily read the optical power measurement results, improving the user experience. At the same time, the entire measurement process is automatically controlled by the microcontroller 104, reducing human operating errors and improving the repeatability and reliability of the test. In addition, the design of this module allows integration with other test modules to provide comprehensive optical module performance analysis.

[0073] In the above embodiment, the wavelength test module 2 is composed of a tunable laser 201, a signal processor 202, a control unit 203, a user interface 204 and a storage unit 205; the tunable laser 201 is electrically connected to the signal processor 202 via a data line; the signal processor 202 is connected to the user interface 204 and the storage unit 205 via a universal data bus; the control unit 203 is connected to the tunable laser 201 via a control signal line RS-485.

[0074] In a specific embodiment, the wavelength test module 2 uses a tunable laser 201 as a light source to emit optical signals of different wavelengths. When the optical signal reaches the receiving end after transmission, the signal processor 202 receives and analyzes the received optical signal and extracts the optical wavelength information therefrom. The control unit 203 is responsible for controlling the wavelength of the tunable laser and coordinating with the signal processor. The user interface 204 provides the operator with a friendly interface to monitor and control the wavelength test process. The storage unit 205 is used to store and manage test data.

[0075] In the detection devices at the transmitting and receiving ends of the optical module, the implementation process of the wavelength test module 2 is as follows:

[0076] b1. Setting the wavelength range: The operator sets the desired wavelength range through the user interface 204 .

[0077] b2. Controlling the laser wavelength: The control unit 203 controls the tunable laser 201 to emit an optical signal of a corresponding wavelength according to the wavelength range set by the operator.

[0078] b3. Sending optical signal: The tunable laser 201 emits an optical signal of a specified wavelength and transmits it to the receiving end.

[0079] b4. Receive and process the signal: The signal processor 202 at the receiving end receives the optical signal and extracts the wavelength information therein.

[0080] b5. Analysis results: The wavelength information after analysis is compared with the wavelength range set by the transmitter.

[0081] b6. Storing data: storing the wavelength test results and related data in the storage unit 205 for subsequent analysis and review.

[0082] In the specific implementation, the use of tunable lasers and precision signal processors can achieve accurate measurement of the wavelength of the optical signal, thereby improving the accuracy of the test. The user interface 204 provides a real-time monitoring function, and the operator can view the wavelength test process and results at any time, and promptly discover and solve problems. The storage unit 205 can effectively manage the test data, facilitating the user's subsequent data analysis and report generation. The control unit 203 realizes automatic control of the wavelength test process, reduces manual intervention, and improves test efficiency and consistency.

[0083] In the above embodiment, the tunable laser 201 is composed of a gain medium 211, a diffraction grating 212, a resonant cavity 213, a control circuit 214, a monitoring device 215, an optical isolator 216 and a power supply 217; the gain medium 211 is composed of an optical fiber; the gain medium 211 is placed in the resonant cavity 213 as a source of laser light; the input end of the diffraction grating 212 is connected to the output end of the gain medium 211, and is used to select light of a specific wavelength for amplification; the resonant cavity 213 is composed of three reflectors, which are arranged around the periphery of the gain medium to form a closed optical path; the control circuit 214 is integrated into the laser package through a cable, and is connected to the gain medium 211 and the diffraction grating 212; the monitoring device 215 includes an optical power meter and a wavelength meter; the monitoring device 215 is connected to the output end of the laser through an optical fiber; the optical isolator 216 is placed at the output end of the laser to prevent reflected light from returning to the laser; and the power supply 217 is connected to various components inside the laser through a cable.

[0084] In a specific embodiment, the working principle of the tunable laser 201 is based on stimulated emission in the gain medium 211, and the reflection grating of the diffraction grating 212 is adjusted by the control circuit 214, so as to achieve frequency tunability of the light in the resonant cavity 213. The monitoring device 215 is used to monitor the output power and frequency of the laser, the optical isolator 216 is used to prevent the interference of the reflected light on the laser, and the power supply 217 provides the operating voltage for the laser.

[0085] In a detection device at the transmitting end and the receiving end of an optical module, the operation of the tunable laser 201 is as follows: first, the control circuit 214 receives an external control signal and adjusts the reflection grating of the diffraction grating 212 as needed to change the length of the resonant cavity 213, thereby adjusting the output frequency of the laser. Photons are generated by stimulated emission in the gain medium 211, and after amplification and resonance of the resonant cavity 213, a tunable laser signal is output. The monitoring device 215 monitors the output power and frequency of the laser, and feeds back the monitoring results to the control circuit 214 to achieve stable control of the laser. The optical isolator 216 prevents the optical signal output by the laser from being reflected back into the laser to avoid interference and damage to the laser. The power supply 217 provides the operating voltage for the laser to ensure its normal operation.

[0086] In a specific implementation, the tunable laser 201 can achieve tunability of the output optical signal frequency to adapt to different communication requirements and environmental conditions. Through the control circuit 214 and the monitoring device 215, the laser output power and frequency can be stably controlled to ensure stable performance. In addition, the tunable laser in this embodiment has flexible adjustability and reliable working performance, which can meet the high requirements of the optical communication system for the light source.

[0087] In the above embodiment, the eye diagram analysis module 4 is composed of a programmable gate array FPGA401, a signal conditioning circuit 402, a data storage device 403 and a communication interface 404; the input port of the signal conditioning circuit 402 is connected to the photodetector; the output ports of the signal conditioning circuit 402 and the communication interface 404 are electrically connected to the input port of the programmable gate array FPGA401; the data storage device 403 is electrically connected to the programmable gate array FPGA401; and the communication interface 404 outputs data through a USB interface.

[0088] In a specific embodiment, the eye diagram analysis module 4 uses a programmable gate array FPGA401 as a core processor, and the signal conditioning circuit 402 is used to pre-process the received optical signal, including operations such as amplification and filtering. The data storage 403 is used to store the collected eye diagram data, and the communication interface 404 is used to exchange and communicate data with other modules or external devices. In the detection device at the transmitting end and the receiving end of the optical module, the received optical signal is transmitted to the eye diagram analysis module 4 through the optical receiver. Then, the signal conditioning circuit 402 pre-processes the received optical signal to ensure signal quality and stability. FPGA401 controls the collection process of the eye diagram data and stores the data in the data storage 403. Then, FPGA401 analyzes the collected eye diagram data, generates an eye diagram image, and evaluates the quality and stability of the signal. The analyzed eye diagram data is stored in the data storage 403 for subsequent analysis and reference. Through the communication interface 404, the eye diagram analysis module 4 can exchange and communicate data with other modules or external devices to achieve data sharing and remote control.

[0089] Through eye diagram analysis, the quality and stability of the received optical signal can be accurately evaluated, providing an important basis for system performance evaluation. By monitoring the morphology and changes of the eye diagram, abnormal conditions in signal transmission can be discovered in time, and fault diagnosis and elimination can be performed. Secondly, the eye diagram analysis module 4 can store the collected eye diagram data, which is convenient for subsequent data analysis and sharing. Through the eye diagram analysis module 4, real-time monitoring of optical signals can be achieved, problems in signal transmission can be discovered in time, and corresponding measures can be taken.

[0090] In the above embodiment, the signal conditioning circuit 402 is composed of an amplifier, a filter, an equalizer, an attenuator, an impedance matching circuit and a DC bias circuit; the output port of the amplifier is connected to the input port of the filter; the output port of the filter is connected to the input port of the equalizer; the output port of the equalizer is connected to the input port of the attenuator; the output port of the attenuator is connected to the input port of the impedance matching circuit; the output port of the impedance matching circuit is connected to the input port of the DC bias circuit; and the output port of the DC bias circuit is connected to the input port of the analog-to-digital converter.

[0091] In a specific embodiment, the amplifier is used to amplify the weak electrical signal generated by the photodetector to meet the input requirements of the ADC. It includes a preamplifier and a gain adjustable amplifier. The filter is used to filter out noise and unnecessary frequency components in the signal to ensure the purity of the signal. It includes a low-pass filter, a high-pass filter or a band-pass filter. The equalizer is used to adjust the frequency response of the signal to compensate for signal distortion in the optical fiber or other transmission medium. Attenuator If the signal amplitude is too large, an attenuator is used to reduce the signal strength to prevent ADC saturation. The impedance matching circuit ensures impedance matching between the signal source and the amplifier to reduce signal reflection and distortion. The DC bias circuit provides an appropriate DC bias for the signal to ensure that the signal is within the effective input range of the ADC. Among them, the output of the photodetector is connected to the amplifier: the electrical signal generated by the photodetector is first sent to the amplifier for amplification. The output of the amplifier is connected to the filter: the amplified signal is filtered to remove noise and unnecessary frequency components. The signal is adjusted for frequency response by the equalizer. If the signal amplitude is too large, the signal strength is reduced by the attenuator. The signal passes through the impedance matching circuit to ensure matching with the input impedance of the ADC. The signal is added with an appropriate DC bias to meet the input requirements of the ADC. Finally, the conditioned signal is sent to the ADC for analog-to-digital conversion.

[0092] In the above embodiment, the communication interface module 7 uses the RS-485 communication protocol to exchange data with the external system.

[0093] In a specific embodiment, the communication interface module 7 is based on the RS-485 communication protocol, which is a standard protocol for serial communication and has the characteristics of high anti-interference and long-distance transmission. In this module, RS-485 drivers and receivers are used to realize data transmission and reception, and the format of the communication protocol includes a start bit, a data bit, a stop bit, a check bit, etc.

[0094] In the detection device at the transmitting end and the receiving end of the optical module, the data to be sent is generated by the controller or other detection devices, serially converted through the communication interface module 7, and encoded according to the RS-485 communication protocol format. The RS-485 driver is responsible for converting the serial data into a differential signal and sending it to the communication line, while the receiver is responsible for receiving the data sent by the external system and converting the differential signal into serial data for processing by the controller or other devices. Through the RS-485 communication protocol, the communication interface module 7 exchanges data with the external system to achieve two-way transmission of information. The controller controls the working state of the communication interface module 7 as needed, including data sending, receiving, error handling, etc. After receiving the data sent by the external system, the controller performs corresponding data processing and analysis, and makes corresponding responses or control operations as needed.

[0095] Although the specific embodiments of the present invention are described above, it should be understood by those skilled in the art that these specific embodiments are only examples, and those skilled in the art may omit, replace, and change the details of the above methods and systems without departing from the principles and essence of the present invention. For example, merging the above method steps so as to perform substantially the same functions in substantially the same manner to achieve substantially the same results is within the scope of the present invention. Therefore, the scope of the present invention is limited only by the appended claims.

Claims

1. A detection device for a transmitting end and a receiving end of an optical module, characterized in that: include: An optical power measurement module (1) is used to accurately measure the optical power at the transmitting end of the optical module; A wavelength test module (2), used for measuring the central wavelength of the optical signal emitted by the optical module; A bit error rate analysis module (3), used for evaluating the signal quality at the receiving end and measuring the bit error rate; An eye diagram analysis module (4), used for generating an eye diagram and analyzing the integrity and stability of a signal; Temperature and environment monitoring module (5), used to monitor environmental interference factors and ensure the consistency of test conditions; A control and data processing unit (6), used to coordinate the work of each module, process data and provide a user interface; A communication interface module (7), used to realize data exchange between the detection device and an external system; A power circuit (8) for providing electrical energy; The optical power measurement module (1) and the wavelength test module (2) are connected to the optical module transmitting end via an optical fiber jumper; the bit error rate analysis module (3) and the eye diagram analysis module (4) are connected to the optical module receiving end via an optical signal distributor (9) for analyzing received signals; the control and data processing unit (6) is connected to all modules via an internal bus; and the communication interface module (7) provides external connection via a universal serial bus.

2. The detection device for the transmitting end and the receiving end of an optical module according to claim 1, characterized in that: The input port of the optical signal distributor (9) is connected to the receiving end of the optical module, and the output port of the optical signal distributor (9) is respectively connected to the bit error rate analysis module (3) and the eye diagram analysis module (4), so as to allow the same optical signal to be distributed to multiple detection devices.

3. The detection device for the transmitting end and the receiving end of an optical module according to claim 1, characterized in that: The optical power measurement module (1) comprises a light detector (101), a signal amplifier (102), an analog-to-digital converter (103) and a microcontroller (104); the light detector (101) is connected to the signal amplifier (102) via a cable; the output end of the signal amplifier (102) is electrically connected to the input end of the analog-to-digital converter (103); and the output end of the analog-to-digital converter (103) is electrically connected to the input end of the microcontroller (104).

4. The detection device for a transmitting end and a receiving end of an optical module according to claim 1, characterized in that: The wavelength test module (2) is composed of a tunable laser (201), a signal processor (202), a control unit (203), a user interface (204) and a storage unit (205); the tunable laser (201) is electrically connected to the signal processor (202) via a data line; the signal processor (202) is connected to the user interface (204) and the storage unit (205) via a universal data bus; and the control unit (203) is connected to the tunable laser (201) via a control signal line RS-485.

5. The detection device for the transmitting end and the receiving end of an optical module according to claim 4, characterized in that: The tunable laser (201) is composed of a gain medium (211), a diffraction grating (212), a resonant cavity (213), a control circuit (214), a monitoring device (215), an optical isolator (216) and a power supply (217); the gain medium (211) is composed of an optical fiber; the gain medium (211) is placed in the resonant cavity (213) as a source of laser light; the input end of the diffraction grating (212) is connected to the output end of the gain medium (211) for selecting light of a specific wavelength for amplification; the resonant cavity (213) ) is composed of three reflectors, which are arranged around the periphery of the gain medium to form a closed optical path; the control circuit (214) is integrated into the laser package through a cable and connected to the gain medium (211) and the diffraction grating (212); the monitoring device (215) includes an optical power meter and a wavelength meter; the monitoring device (215) is connected to the output end of the laser through an optical fiber; the optical isolator (216) is placed at the output end of the laser to prevent reflected light from returning to the laser; the power supply (217) is connected to various components inside the laser through a cable.

6. The detection device for the transmitting end and the receiving end of an optical module according to claim 1, characterized in that: The eye diagram analysis module (4) is composed of a field programmable gate array (FPGA) (401), a signal conditioning circuit (402), a data storage device (403) and a communication interface (404); the input port of the signal conditioning circuit (402) is connected to a photodetector; the output ports of the signal conditioning circuit (402) and the communication interface (404) are electrically connected to the input port of the field programmable gate array (FPGA) (401); the data storage device (403) is electrically connected to the field programmable gate array (FPGA) (401); and the communication interface (404) outputs data via a USB interface.

7. The detection device for the transmitting end and the receiving end of an optical module according to claim 6, characterized in that: The signal conditioning circuit (402) is composed of an amplifier, a filter, an equalizer, an attenuator, an impedance matching circuit and a DC bias circuit; the output port of the amplifier is connected to the input port of the filter; the output port of the filter is connected to the input port of the equalizer; the output port of the equalizer is connected to the input port of the attenuator; the output port of the attenuator is connected to the input port of the impedance matching circuit; the output port of the impedance matching circuit is connected to the input port of the DC bias circuit; the output port of the DC bias circuit is connected to the input port of the analog-to-digital converter.

8. The detection device for the transmitting end and the receiving end of an optical module according to claim 1, characterized in that: The communication interface module (7) uses the RS-485 communication protocol to exchange data with an external system.

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