A driving control system and a control method supporting hot plug of an EML laser

Abstract

The application relates to a driving control system and a control method supporting EML laser thermal plugging, wherein the system comprises a power supply module, an acquisition module, a detection control module and an on-off control module. The system can monitor the EML laser in real time. When thermal plugging occurs due to factors such as machine vibration and loose connection, the detection control module can quickly identify and detect abnormal working conditions according to load current, actual voltage and other information, and quickly disconnect the power supply of the EML laser through the on-off control module. Similarly, the detection control module can also identify normal working conditions and timely restore the power supply of the EML laser. Therefore, the EML laser can effectively protect itself when thermal plugging occurs, avoid damage to the EML laser caused by overshoot and overvoltage, and allow thermal plugging to occur under normal working conditions, thereby greatly improving the practicability.

Description

Technical Field

[0001] This invention relates to the field of EML laser technology, and in particular to a drive control system and control method that supports hot-swapping of EML lasers. Background Technology

[0002] With the development of optical communication technology, the application of EML lasers is becoming increasingly widespread. Compared with traditional DML lasers, EML lasers integrate not only an LD laser but also an EAM modulator. When a suitable bias current passes through the LD in the forward direction, the LD emits light, which enters the EAM modulator, is absorbed, and converted into current. Typically, the laser is driven by a constant current source, and the magnitude of the current determines the output optical power of the LD; while the EAM modulator is driven by a constant voltage source, and the load current is determined by both the LD operating current and the EAM driving voltage.

[0003] Due to the characteristics of a constant current source, when the load (LD laser) is disconnected while the constant current source is operating, the constant current source will operate at its maximum output current. When the load (LD laser) reconnects to the constant current source drive, the current loop is momentarily closed. Before the constant current source circuit returns to its normal output current state, the loop current will exceed the set normal operating current, i.e., current overshoot occurs. When the overshoot current exceeds the maximum allowable operating current of the laser, the laser is at risk of being damaged.

[0004] The aforementioned problems are frequently encountered and difficult to avoid in practical applications. For example, due to issues such as the reliability of laser connections and unavoidable mechanical jitter, "hot-plugging" often occurs unintentionally. Hot-plugging leads to excessive optical power generated by the high current of the laser diode (LD). This excessive optical power is absorbed by the laser amplifier (EAM) and converted into excessive current, thus damaging the EAM laser. Furthermore, overshoot of the EAM modulator's drive voltage caused by hot-plugging can also damage the EAM modulator. Currently, there is no effective solution in EML laser driver equipment. Therefore, there is an urgent need for an EML laser driver control solution that allows hot-plugging behavior. Summary of the Invention

[0005] In view of this, it is necessary to provide a drive control system and control method that supports hot-swapping of EML lasers, so as to solve the problem that hot-swapping can damage EML lasers in the prior art.

[0006] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution:

[0007] In a first aspect, the present invention provides a drive control system supporting hot-swapping of an EML laser, applied to an EML laser. The system includes a power supply module, a data acquisition module, a detection control module, and an on / off control module. The power supply module is electrically connected to the EML laser, the data acquisition module is electrically connected to the EML laser, the detection control module is electrically connected to the power supply module, the data acquisition module, and the on / off control module, and the on / off control module is electrically connected to the power supply module, wherein:

[0008] The power supply module is used to supply power to the EML laser according to the current setting value and the voltage setting value;

[0009] The acquisition module is used to obtain the load current;

[0010] The detection and control module is used to acquire the actual output voltage, obtain operating condition information based on the relationship between the load current and the current setting value, and between the actual output voltage and the voltage setting value, and send control commands to the on / off control module based on the operating condition information.

[0011] The on / off control module is used to disconnect or disconnect the power supply to the power supply module according to the control command.

[0012] Furthermore, the EML laser includes an LD laser and an EAM modulator; the power supply module includes a current setting module, a constant current source, a voltage setting module, and a constant voltage source. The current setting module is electrically connected to the signal input terminal of the detection and control module and the constant current source. The current output terminal of the constant current source is electrically connected to the LD laser. The voltage setting module is electrically connected to the signal input terminal of the detection and control module and the constant voltage source. The voltage output terminal of the constant voltage source is electrically connected to the EAM modulator, wherein:

[0013] The current setting module is used to set the output current of the constant current source according to the current setting value, and to provide power supply current to the LD laser through the constant current source;

[0014] The voltage setting module is used to set the output voltage of the constant voltage source according to the voltage setting value, and to provide power supply voltage to the EAM modulator through the constant voltage source.

[0015] Furthermore, the control commands include disconnection commands and closing commands, the disconnection commands including current disconnection commands and voltage disconnection commands; the on / off control module includes a switch control module, a current switch module, and a voltage switch module, the switch control module being electrically connected to the detection control module, the current switch module, and the voltage switch module, the current switch module being electrically connected between the signal input terminal of the constant current source and the current setting module, and the voltage switch module being electrically connected between the signal input terminal of the constant voltage source and the voltage setting module, wherein the switch control module is used for:

[0016] Disconnect the current switch module according to the current disconnect command;

[0017] Disconnect the voltage switching module according to the voltage disconnect command;

[0018] According to the closing command, the current switch module and the voltage switch module are closed.

[0019] Furthermore, the operating condition information includes current power supply disconnection information; the detection and control module includes a judgment module, which is electrically connected to the acquisition module and the switch control module, and the judgment module is used for:

[0020] The power supply disconnection information is obtained based on the relationship between the load current and the current setting value;

[0021] Based on the current power supply disconnection information, the current disconnection command and the voltage disconnection command are sent to the switch control module.

[0022] Furthermore, the operating condition information also includes voltage supply overload information; the detection and control module also includes a voltage monitoring module, which is electrically connected to the voltage output terminal of the constant voltage source and the voltage switch module. The voltage monitoring module is used for:

[0023] Obtain the actual output voltage;

[0024] The voltage overload information is obtained based on the relationship between the actual output voltage and the voltage setting value;

[0025] Based on the voltage overload information, disconnect the voltage switch module.

[0026] Furthermore, the detection and control module also includes a central processing module, which is electrically connected to the current setting module, the voltage setting module, the acquisition module, the judgment module, the switch control module, the voltage monitoring module, and the voltage switch module. The central processing module is used for:

[0027] The voltage overload information is acquired, and a current disconnection command is sent to the switch control module based on the voltage overload information.

[0028] The operating condition information is obtained, and a closing command is sent to the switch control module based on the operating condition information.

[0029] Secondly, the present invention also provides a drive control method supporting hot-plugging of EML lasers, applied to the aforementioned drive control system supporting hot-plugging of EML lasers, the method comprising:

[0030] Power the EML laser according to the current setting value and the voltage setting value;

[0031] Obtain the load current;

[0032] The actual output voltage is obtained, and the operating condition information is obtained based on the relationship between the load current and the current setting value, and between the actual output voltage and the voltage setting value. Control commands are then sent to the on / off control module based on the operating condition information.

[0033] According to the control command, the power supply to the power supply module is disconnected or closed.

[0034] Furthermore, the operating condition information includes current disconnection information; the process of acquiring the actual output voltage involves obtaining operating condition information based on the relationship between the load current and the current setting value, and between the actual output voltage and the voltage setting value, and sending control commands to the on / off control module based on the operating condition information, including:

[0035] The power supply disconnection information is obtained based on the relationship between the load current and the current setting value;

[0036] Based on the current power supply disconnection information, the current disconnection command and the voltage disconnection command are sent to the switch control module.

[0037] Furthermore, the operating condition information also includes voltage overload information; the process of obtaining the actual output voltage, obtaining operating condition information based on the relationship between the load current and the current setting value, and between the actual output voltage and the voltage setting value, and sending control commands to the on / off control module based on the operating condition information, further includes:

[0038] Obtain the actual output voltage;

[0039] The voltage overload information is obtained based on the relationship between the actual output voltage and the voltage setting value;

[0040] Based on the voltage overload information, disconnect the voltage switching module;

[0041] Based on the voltage overload information, a current disconnection command is sent to the switch control module.

[0042] Furthermore, the control commands include disconnection commands and connection commands, the disconnection commands including current disconnection commands and voltage disconnection commands; the step of disconnecting or connecting the power supply to the power supply module according to the control commands includes:

[0043] Disconnect the current switch module according to the current disconnect command;

[0044] Disconnect the voltage switching module according to the voltage disconnect command;

[0045] According to the closing command, the current switch module and the voltage switch module are closed.

[0046] This invention provides a drive control system and control method that supports hot-swapping of EML lasers. The system supplies power to the EML laser through a power supply module based on current and voltage settings. It acquires the load current through a data acquisition module and the actual output voltage through a detection control module. Based on the relationship between the load current and the current setting, and between the actual output voltage and the voltage setting, it obtains operating condition information and sends control commands to an on / off control module based on the operating condition information. The on / off control module is used to disconnect or close the power supply to the power supply module according to the control commands. Compared to existing technologies, this invention can monitor the EML laser in real time. When a loose connection occurs due to factors such as machine vibration, resulting in hot-swapping, the detection and control module can quickly identify and detect the abnormal operating condition based on information such as load current and actual voltage. It can then quickly disconnect the power supply to the EML laser through the on / off control module. Similarly, the detection and control module can also identify the normal operating condition and restore the power supply to the EML laser in a timely manner. This allows the EML laser to effectively protect itself when hot-swapping occurs, avoiding damage to the EML laser from overshoot and overvoltage. It allows hot-swapping behavior to occur under normal operating conditions, greatly improving its practicality. Attached Figure Description

[0047] Figure 1 A system architecture diagram of an embodiment of the drive control system for supporting hot-plugging of EML lasers provided by the present invention;

[0048] Figure 2 This is a flowchart of an embodiment of the drive control method for supporting hot-plugging of EML lasers provided by the present invention. Detailed Implementation

[0049] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which form part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0050] Before describing specific embodiments, some terms in the specification will be explained:

[0051] EML: Electro-absorption Modulated Laser. EML lasers were the first mass-produced indium gallium arsenide phosphide (InGaAsP) optoelectronic integrated devices. They integrate the laser source and the electro-absorption modulator on the same semiconductor chip, offering advantages such as low driving voltage, low power consumption, high modulation bandwidth, small size, and compact structure. Compared to traditional DFB lasers, they are more suitable for high-speed, long-distance transmission.

[0052] LD: Laser Diode, also known as semiconductor laser, is a type of laser that uses semiconductor materials as its working substance and is the most important type of laser in practical applications.

[0053] EAM: Electro Absorption Modulator, is an optical signal modulation device made using the exciton absorption effect in semiconductors. Due to its fast response speed and low power consumption, it is widely used in signal modulation and coding in high-speed optical fiber communication.

[0054] Hot-swapping: Hot-swap refers to inserting or removing modules, boards, circuits, and other devices into or out of a system without turning off the system power, whether manually or manually.

[0055] In the description of this application, "multiple" means two or more, unless otherwise expressly and specifically defined.

[0056] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0057] This invention uses a detection control module to determine the operating condition of the EML laser based on the current and voltage generated during its operation. Based on the operating condition, it controls the on / off control module to control the disconnection or connection of the power supply to the EML laser, thereby achieving self-protection and reset of the EML laser and allowing hot-swapping under normal operating conditions.

[0058] This invention provides a drive control system method, apparatus, device, and storage medium that supports hot-swapping of EML lasers, which will be described below.

[0059] Combination Figure 1 As shown in the figure, a specific embodiment of the present invention discloses a drive control system supporting hot-swapping of an EML laser. This system is applied to an EML laser 200. The system includes a power supply module 110, a data acquisition module 120, a detection control module 130, and an on / off control module 140. The power supply module 110 is electrically connected to the EML laser 200, the data acquisition module 120 is electrically connected to the EML laser 200, the detection control module 130 is electrically connected to the power supply module 110, the data acquisition module 120, and the on / off control module 140, and the on / off control module 140 is electrically connected to the power supply module 110. Wherein:

[0060] The power supply module 110 is used to supply power to the EML laser 200 according to the current setting value and the voltage setting value;

[0061] The acquisition module 120 is used to acquire the load current;

[0062] The detection and control module 130 is used to acquire the actual output voltage, obtain operating condition information based on the relationship between the load current and the current setting value, and between the actual output voltage and the voltage setting value, and send control commands to the on / off control module 140 based on the operating condition information.

[0063] The on / off control module 140 is used to disconnect or close the power supply to the power supply module 110 according to the control command.

[0064] This invention provides a drive control system and control method that supports hot-swapping of EML lasers. The system supplies power to the EML laser 200 through a power supply module 110 based on current and voltage settings. It acquires the load current through a data acquisition module 120 and the actual output voltage through a detection control module 130. Based on the relationship between the load current and the current setting, and between the actual output voltage and the voltage setting, it obtains operating condition information and sends control commands to an on / off control module 140 based on the operating condition information. The on / off control module 140 is used to disconnect or close the power supply to the power supply module 110 according to the control commands. Compared to existing technologies, this invention can monitor the EML laser 200 in real time. When a connection becomes loose due to factors such as machine vibration, resulting in hot-swapping, the detection and control module 130 can quickly identify and detect the abnormal operating condition based on information such as load current and actual voltage. The power supply to the EML laser 200 is then quickly disconnected through the on / off control module 140. Similarly, the detection and control module 130 can also identify the normal operating condition and restore the power supply to the EML laser 200 in a timely manner. This allows the EML laser 200 to effectively protect itself when hot-swapping occurs, avoiding damage to the EML laser 200 due to overshoot and overvoltage. Hot-swapping is allowed under normal operating conditions, greatly improving its practicality.

[0065] Furthermore, as a preferred embodiment, the EML laser 200 in this embodiment includes an LD laser 210 and an EAM modulator 220; the power supply module 110 includes a current setting module 111, a constant current source 112, a voltage setting module 113, and a constant voltage source 114. The current setting module 111 is electrically connected to the signal input terminals of the detection and control module 130 and the constant current source 112. The current output terminal of the constant current source 112 is electrically connected to the LD laser 210. The voltage setting module 113 is electrically connected to the signal input terminals of the detection and control module 130 and the constant voltage source 114. The voltage output terminal of the constant voltage source 114 is electrically connected to the EAM modulator 220, wherein:

[0066] The current setting module 111 is used to set the output current of the constant current source 112 according to the current setting value, and to provide power supply current to the LD laser 210 through the constant current source 112;

[0067] The voltage setting module 113 is used to set the output voltage of the constant voltage source 114 according to the voltage setting value, and to provide power supply voltage to the EAM modulator 220 through the constant voltage source 114.

[0068] It is understood that the current setting value in this embodiment is the input value for setting the specific output current of the constant current source 112. Depending on the specific type of constant current source 112 in practice, it can be a current value or a voltage setting value for the current of the constant current source 112. The voltage setting value is similar.

[0069] In a preferred embodiment, the acquisition module 120 in this embodiment can be used to acquire the load current of the EML laser 200, i.e. the current of the LD laser 210, and can also acquire parameters such as load voltage, and report these parameters to the central processing module 133.

[0070] In a preferred embodiment, the control commands in this embodiment include disconnection commands and closing commands, wherein the disconnection commands include current disconnection commands and voltage disconnection commands; the on / off control module 140 includes a switch control module 141, a current switch module 142, and a voltage switch module 143, wherein the switch control module 141 is electrically connected to the detection control module 130, the current switch module 142, and the voltage switch module 143, wherein the current switch module 142 is electrically connected between the signal input terminal of the constant current source 112 and the current setting module 111, and the voltage switch module 143 is electrically connected between the signal input terminal of the constant voltage source 114 and the voltage setting module 113, wherein the switch control module 141 is used for:

[0071] Disconnect the current switch module 142 according to the current disconnect command;

[0072] Disconnect the voltage switch module 143 according to the voltage disconnect command;

[0073] According to the closing command, the current switch module 142 and the voltage switch module 143 are closed.

[0074] The current disconnection command and voltage disconnection command are mainly issued by the detection and control module 130 when the hot-plugging action occurs, while the closing command is mainly issued by the detection and control module 130 when the system starts up or after the hot-plugging problem is resolved.

[0075] In a preferred embodiment, the operating condition information in this embodiment includes current power supply disconnection information; the detection and control module 130 includes a judgment module 131, which is electrically connected to the acquisition module 120 and the switch control module 141, and the judgment module 131 is used for:

[0076] The power supply disconnection information is obtained based on the relationship between the load current and the current setting value;

[0077] Based on the current power supply disconnection information, the current disconnection command and the voltage disconnection command are sent to the switch control module 141.

[0078] In a preferred embodiment, the judgment module 131 in this embodiment can determine whether the load (LD laser 210) is working normally or in a disconnected state based on the real-time obtained constant current source 112 working output current, i.e. load current, and the constant current source 112 current setting voltage of the current source setting module, i.e. the current corresponding to the current setting value.

[0079] If the system is in an open state, the constant current source 112 output is quickly shut off via the switch control module 141 and the current switch module 142 to ensure that no instantaneous large current occurs upon reconnection. The constant voltage source 114 output is also disconnected via the switch control module 141 and the voltage switch module 143. Simultaneously, the judgment module 131 is responsible for reporting the protection status to the central control module, allowing users to promptly understand the system's operating status. In this embodiment, the judgment module 131 employs a high-speed comparator circuit to achieve a response speed in the nS range, ensuring rapid shutdown of the constant current source 112 drive in the open-circuit load state.

[0080] The aforementioned judgment module 131 mainly protects and controls the constant current source 112 and the LD laser 210. However, in practice, protection and control are also needed for the constant voltage source 114 and the EAM modulator 220. Therefore, as a preferred embodiment, the operating condition information in this embodiment also includes voltage supply overload information. The detection and control module 130 further includes a voltage monitoring module 132, which is electrically connected to the voltage output terminal of the constant voltage source 114 and the voltage switch module 143. The voltage monitoring module 132 is used for:

[0081] Obtain the actual output voltage;

[0082] The voltage overload information is obtained based on the relationship between the actual output voltage and the voltage setting value;

[0083] Based on the voltage overload information, disconnect the voltage switch module 143.

[0084] In this embodiment, the voltage monitoring module 132 directly obtains the actual output voltage from the constant voltage source 114. In practice, it can also be obtained through the acquisition module 120. The voltage monitoring module 132 is mainly used to monitor whether the actual output voltage of the constant voltage source 114 module exceeds the voltage setting value. If it does, it outputs the status to the central processing module 133 and directly controls the voltage switch module 143 to turn off, thereby shutting down the output of the constant voltage source 114. Similarly, in this embodiment, the voltage monitoring module 132 also uses a high-speed comparison circuit to achieve a response speed of nS to ensure rapid shutdown of the constant voltage source 114 output.

[0085] Furthermore, as a preferred embodiment, the detection and control module 130 in this embodiment further includes a central processing module 133. The central processing module 133 is electrically connected to the current setting module 111, the voltage setting module 113, the acquisition module 120, the judgment module 131, the switch control module 141, the voltage monitoring module 132, and the voltage switch module 143. The central processing module 133 is used for:

[0086] The voltage overload information is acquired, and a current disconnection command is sent to the switch control module 141 based on the voltage overload information.

[0087] The operating condition information is obtained, and a closing command is sent to the switch control module 141 based on the operating condition information.

[0088] The process of acquiring the voltage overload information and sending a current disconnection command to the switch control module 141 based on the voltage overload information is mainly performed after the voltage monitoring module 132 disconnects the constant voltage source 114 and sends the voltage overload information to the central processing module 133. The process of acquiring the operating condition information and sending a closing command to the switch control module 141 based on the operating condition information is mainly performed after confirming that the system connection is good and the hot-plugging phenomenon has been repaired.

[0089] In a preferred embodiment, the central processing module 133 can be implemented by a CPU. The CPU is mainly responsible for sending the current setting value to the current setting module 111 to set the constant current magnitude, receiving real-time operating voltage and current information of the load (LD laser 210) collected by the acquisition module 120, receiving operating condition information provided by the judgment module 131, and sending an enable control reset signal to the switch control module 141 after confirming that the load (LD laser 210) has good contact, thereby reclosing the current switch module 142 and the voltage switch module 143 to restore power. In addition, the CPU is also responsible for interacting with the host computer, receiving control commands and data from the host computer, and reporting test data and system status to the host computer.

[0090] In this embodiment, the CPU can control the current switch module 142 and the voltage switch module 143 by sending an enable reset control reset signal, or it can directly send control signals to control the current switch module 142 and the voltage switch module 143.

[0091] To better implement the drive control system supporting hot-swapping of EML lasers in the embodiments of the present invention, based on the drive control system supporting hot-swapping of EML lasers, please refer to the corresponding documentation. Figure 2 , Figure 2This is a flowchart illustrating an embodiment of the drive control method for supporting hot-plugging of EML lasers provided by the present invention. The embodiment of the present invention provides a drive control method for supporting hot-plugging of EML lasers, applied to the aforementioned drive control system for supporting hot-plugging of EML lasers. The method includes:

[0092] S1. Power the EML laser according to the current setting value and the voltage setting value;

[0093] S2, Obtain the load current;

[0094] S3. Obtain the actual output voltage, and based on the relationship between the load current and the current setting value, and between the actual output voltage and the voltage setting value, obtain the operating condition information, and send a control command to the on / off control module based on the operating condition information.

[0095] S4. According to the control command, disconnect or close the power supply of the power supply module.

[0096] Specifically, in a preferred embodiment, the operating condition information includes current disconnection information. Step S3 in the above process, obtaining the actual output voltage, and obtaining the operating condition information based on the relationship between the load current and the current setting value, and between the actual output voltage and the voltage setting value, and sending a control command to the on / off control module based on the operating condition information, specifically includes:

[0097] The power supply disconnection information is obtained based on the relationship between the load current and the current setting value;

[0098] Based on the current power supply disconnection information, the current disconnection command and the voltage disconnection command are sent to the switch control module.

[0099] Furthermore, as a preferred embodiment, the operating condition information in this embodiment also includes voltage overload information. Step S3, obtaining the actual output voltage, and obtaining operating condition information based on the relationship between the load current and the current setting value, and between the actual output voltage and the voltage setting value, and sending control commands to the on / off control module based on the operating condition information, specifically also includes:

[0100] Obtain the actual output voltage;

[0101] The voltage overload information is obtained based on the relationship between the actual output voltage and the voltage setting value;

[0102] Based on the voltage overload information, disconnect the voltage switching module;

[0103] Based on the voltage overload information, a current disconnection command is sent to the switch control module.

[0104] Furthermore, in a preferred embodiment, the control command includes a disconnect command and a close command, the disconnect command including a current disconnect command and a voltage disconnect command, and step S4 in the above process, disconnecting or closing the power supply to the power supply module according to the control command, includes:

[0105] Disconnect the current switch module according to the current disconnect command;

[0106] Disconnect the voltage switching module according to the voltage disconnect command;

[0107] According to the closing command, the current switch module and the voltage switch module are closed.

[0108] The present invention also provides a more specific embodiment to illustrate steps S1 to S4 in more detail:

[0109] 1. The CPU (i.e., the central control module) receives the power-on command and current setting value from the host computer, sends the current setting value to the current setting module and the voltage setting value to the voltage setting module, and sends enable control reset commands to both.

[0110] 2. After receiving the enable control reset command, the switch control module sends a switch closing command to the current switch module and the voltage switch module;

[0111] 3. After receiving the current setting value sent by the CPU and after the current switch module and voltage switch module perform the switch closing operation, the constant current source turns on and outputs a specified current, and at the same time the constant voltage source turns on and outputs a specified voltage.

[0112] 4. At the same time, the acquisition module begins to collect the voltage and current information of the load (LD laser) and report it to the CPU;

[0113] 5. When the load (LD laser) is disconnected or about to be disconnected, the judgment module will compare the current corresponding to the current setting value with the actual load current. If the former is significantly greater than the latter, it is considered that a disconnection has occurred or is about to occur. The module will quickly send a disconnection switch operation signal to the current switch module through the switch control module to shut down the constant current source output, ensuring that there will be no instantaneous large current when the connection is restored. The module will also send a disconnection switch operation signal to the voltage switch module to shut down the constant voltage source output.

[0114] 6. At the same time, the judgment module reports the protection status to the CPU, and the CPU reports it to the host computer (user).

[0115] 7. Once the user confirms that the load (LD laser) has made good contact, an enable control reset command is issued, which sends a closing command to the switch control module and a current setting value to the current setting module, causing the constant current source to generate the set constant current. At the same time, a voltage setting value is sent to the voltage setting module, and a switch closing operation signal is sent to the voltage switch module, causing the constant voltage source to generate the set constant voltage.

[0116] In addition, when the constant voltage source output becomes too high due to "hot-plugging", the voltage monitoring module detects this and quickly sends a disconnect operation to the voltage switch module to shut down the constant voltage source output, thereby preventing damage to the EAM due to overvoltage.

[0117] Subsequently, the voltage monitoring module reports the overvoltage event to the CPU, which then resets the settings of the current setting module and the voltage setting module, and shuts down the current switch module. This disables all drives to the EML devices, preventing them from operating in abnormal states.

[0118] The present invention has the following beneficial effects:

[0119] 1. This invention effectively realizes the self-protection function of EML laser when hot-plugging occurs, avoids possible "hot-plugging" overcurrent, and thus protects the load (LD laser) from damage.

[0120] 2. Since the judgment module and the switch control module are implemented entirely through high-speed hardware circuits, the reliability, stability and speed of this system are ensured.

[0121] 3. Since the voltage monitoring module can also be implemented through high-speed hardware circuits, it can quickly detect whether the output voltage of the constant voltage source is too high and quickly control the voltage switching module to achieve switching action, thereby avoiding damage to EAM caused by long-term overvoltage.

[0122] 4. Considering the relationship between EAM and LD, this solution also realizes that after detecting an open circuit in LD, in addition to quickly disconnecting the constant current source, it will also quickly shut down the constant voltage source, thereby avoiding EAM current overshoot caused by LD current overshoot.

[0123] In summary, this invention provides a drive control system and control method that supports hot-swapping of EML lasers. The system supplies power to the EML laser through a power supply module based on current and voltage settings. It acquires the load current through a data acquisition module and the actual output voltage through a detection control module. Based on the relationship between the load current and the current setting, and between the actual output voltage and the voltage setting, it obtains operating condition information and sends control commands to the on / off control module based on the operating condition information. The on / off control module is used to disconnect or close the power supply to the power supply module according to the control commands. Compared to existing technologies, this invention can monitor the EML laser in real time. When a loose connection occurs due to factors such as machine vibration, resulting in hot-swapping, the detection and control module can quickly identify and detect the abnormal operating condition based on information such as load current and actual voltage. It can then quickly disconnect the power supply to the EML laser through the on / off control module. Similarly, the detection and control module can also identify the normal operating condition and restore the power supply to the EML laser in a timely manner. This allows the EML laser to effectively protect itself when hot-swapping occurs, avoiding damage to the EML laser from overshoot and overvoltage. It allows hot-swapping behavior to occur under normal operating conditions, greatly improving its practicality.

[0124] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A drive control system supporting hot-swapping of EML lasers, applied to EML lasers, characterized in that, The system includes a power supply module, a data acquisition module, a detection and control module, and an on / off control module. The power supply module is electrically connected to the EML laser, the data acquisition module is electrically connected to the EML laser, the detection and control module is electrically connected to the power supply module, the data acquisition module, and the on / off control module, and the on / off control module is electrically connected to the power supply module. The power supply module includes a constant voltage source, and the on / off control module includes a switch control module, wherein: The power supply module is used to supply power to the EML laser according to the current setting value and the voltage setting value; The acquisition module is used to obtain the load current; The detection and control module is used to acquire the actual output voltage, obtain operating condition information based on the relationship between the load current and the current setting value, and between the actual output voltage and the voltage setting value, and send control commands to the on / off control module based on the operating condition information. The on / off control module is used to disconnect or close the power supply to the power supply module according to the control command; The operating condition information includes current supply disconnection information; the detection and control module includes a judgment module, which is electrically connected to the acquisition module and the switch control module, and the judgment module is used for: The power supply disconnection information is obtained based on the relationship between the load current and the current setting value; Based on the current power supply disconnection information, the current disconnection command and the voltage disconnection command are sent to the switch control module. The operating condition information also includes voltage supply overload information; the detection and control module further includes a voltage monitoring module, which is electrically connected to the voltage output terminal of the constant voltage source and the voltage switch module. The voltage monitoring module is used for: Obtain the actual output voltage; Based on the relationship between the actual output voltage and the voltage setting value, voltage overload information is obtained; Based on the voltage overload information, disconnect the voltage switch module.

2. The drive control system supporting hot-swapping of EML lasers according to claim 1, characterized in that, The EML laser includes an LD laser and an EAM modulator; the power supply module further includes a current setting module, a constant current source, and a voltage setting module. The current setting module is electrically connected to the signal input terminal of the detection and control module and the constant current source, and the current output terminal of the constant current source is electrically connected to the LD laser. The voltage setting module is electrically connected to the signal input terminal of the detection and control module and the constant voltage source, and the voltage output terminal of the constant voltage source is electrically connected to the EAM modulator, wherein: The current setting module is used to set the output current of the constant current source according to the current setting value, and to provide power supply current to the LD laser through the constant current source; The voltage setting module is used to set the output voltage of the constant voltage source according to the voltage setting value, and to provide power supply voltage to the EAM modulator through the constant voltage source.

3. The drive control system supporting hot-swapping of EML lasers according to claim 2, characterized in that, The control commands include disconnection commands and closing commands, the disconnection commands including current disconnection commands and voltage disconnection commands; the on / off control module further includes a current switch module and a voltage switch module, the switch control module is electrically connected to the detection control module, the current switch module, and the voltage switch module, the current switch module is electrically connected between the signal input terminal of the constant current source and the current setting module, and the voltage switch module is electrically connected between the signal input terminal of the constant voltage source and the voltage setting module, wherein the switch control module is used for: Disconnect the current switch module according to the current disconnect command; Disconnect the voltage switching module according to the voltage disconnect command; According to the closing command, the current switch module and the voltage switch module are closed.

4. The drive control system supporting hot-swapping of EML lasers according to claim 1, characterized in that, The detection and control module further includes a central processing module, which is electrically connected to the current setting module, the voltage setting module, the acquisition module, the judgment module, the switch control module, the voltage monitoring module, and the voltage switch module. The central processing module is used for: The voltage overload information is acquired, and a current disconnection command is sent to the switch control module based on the voltage overload information. The operating condition information is obtained, and a closing command is sent to the switch control module based on the operating condition information.

5. A drive control method supporting hot-swapping of EML lasers, applied to the drive control system supporting hot-swapping of EML lasers as described in claim 4, characterized in that, The method includes: Power the EML laser according to the current setting value and the voltage setting value; Obtain the load current; The actual output voltage is obtained, and the operating condition information is obtained based on the relationship between the load current and the current setting value, and between the actual output voltage and the voltage setting value. Control commands are then sent to the on / off control module based on the operating condition information. According to the control command, the power supply to the power supply module is disconnected or closed.

6. The drive control method supporting hot-plugging of EML lasers according to claim 5, characterized in that, The operating condition information includes current disconnection information; the actual output voltage is obtained by calculating the operating condition information based on the relationship between the load current and the current setting value, and between the actual output voltage and the voltage setting value, and by sending control commands to the on / off control module based on the operating condition information, including: The power supply disconnection information is obtained based on the relationship between the load current and the current setting value; Based on the current power supply disconnection information, the current disconnection command and the voltage disconnection command are sent to the switch control module.

7. The drive control method for supporting hot-plugging of EML lasers according to claim 6, characterized in that, The operating condition information also includes voltage overload information; the process of obtaining the actual output voltage, obtaining the operating condition information based on the relationship between the load current and the current setting value, and between the actual output voltage and the voltage setting value, and sending control commands to the on / off control module based on the operating condition information, further includes: Obtain the actual output voltage; The voltage overload information is obtained based on the relationship between the actual output voltage and the voltage setting value; Based on the voltage overload information, disconnect the voltage switching module; Based on the voltage overload information, a current disconnection command is sent to the switch control module.

8. The drive control method supporting hot-plugging of EML lasers according to claim 7, characterized in that, The control commands include disconnection commands and connection commands, wherein the disconnection commands include current disconnection commands and voltage disconnection commands; the step of disconnecting or connecting the power supply to the power supply module according to the control commands includes: Disconnect the current switch module according to the current disconnect command; Disconnect the voltage switching module according to the voltage disconnect command; According to the closing command, the current switch module and the voltage switch module are closed.

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