Multi-mode self-adaptive radio frequency Q-drive control device and control method

Abstract

The invention belongs to the technical field of devices utilizing stimulated emission, and particularly relates to a multi-mode self-adaptive radio frequency Q-drive control device and a control method. According to the multi-mode self-adaptive radio frequency Q-drive control device, a digital analog switch is adopted to replace a traditional mechanical switch, the problem of contact disconnection caused by poor contact or long-term operation is remarkably reduced, and therefore the stability and reliability of a whole laser signal modulation system are improved. The use of the programmable logic controller allows a user to flexibly customize signal processing logic according to specific requirements, so that the system can adapt to various different application scenes. In addition, a user can conveniently add a new working mode, and hardware does not need to be changed on a large scale, so that the expansibility of the system is greatly enhanced. The editable logic device can realize high-frequency operation, is suitable for rapid data processing and real-time application, and can reduce signal delay and improve the reaction speed of the system.

Description

Technical Field

[0001] The present invention belongs to the technical field of devices utilizing stimulated emission, and particularly relates to a multi-mode adaptive radio frequency Q drive control device and a control method. Background Art

[0002] The Q drive source is a dedicated drive power supply for an Acousto-Optic Q-switch device. In a pulsed solid-state laser, it receives an external trigger control signal, generates a corresponding radio frequency signal, and applies it to the Q-switch element, thereby realizing the control of the presence or absence of laser output and the modulation of the pulse waveform. The output performance of the Q drive source is crucial for parameters such as the laser power, pulse width, and repetition frequency of the pulsed solid-state laser.

[0003] In the Q-switch control of a pulsed solid-state laser, the required pulsed laser parameters are obtained through the modulation of the radio frequency energy of the Q drive source. Therefore, it is very crucial to realize the modulation of the radio frequency output of the Q drive source. The laser signal modulation systems in the prior art usually adopt a fixed hardware configuration, which has the risks of poor contact of mechanical switches and misoperation of manual operations, restricting the flexibility and expandability of the system. For example, the mechanical switch microswitch has problems such as poor contact and disconnection of the contacts after long-term use; manual operation is required to toggle the switch, which has the risk of misoperation; the mode is single, and after using the mechanical switch, the mode change can only be achieved by disassembling the machine to toggle the switch. Summary of the Invention

[0004] The purpose of the present invention is to provide a multi-mode adaptive radio frequency Q drive control device and a control method.

[0005] To solve the above technical problems, the present invention provides a multi-mode adaptive radio frequency Q drive control device, including:

[0006] A programmable logic controller, configured to generate a control signal according to an external signal generated by an external signal generation module and a preset working mode;

[0007] A digital-to-analog switch, configured to output a PK_Feed signal according to a control signal and a level signal generated by a level signal generation module;

[0008] A fundamental frequency module, configured to output a fundamental frequency signal;

[0009] A mixer, configured to perform mixing processing on the fundamental frequency signal and the PK_Feed signal;

[0010] A radio frequency output module, configured to convert the signal after mixing processing into a radio frequency signal;

[0011] A laser output module, configured to convert the radio frequency signal and the pump light into laser output.

[0012] In one embodiment of the present application, the external signals include: an external first light output signal, an external second light output signal, and an external first pulse suppression signal;

[0013] The external first light output signal is a high-low level signal;

[0014] The external second light output signal is a PWM signal.

[0015] In one embodiment of the present application, the preset working modes include: a level mode, an edge trigger mode, and a first pulse suppression mode.

[0016] In one embodiment of the present application, the control signals include: a light output signal Modin, a light leakage signal PK, and a first pulse suppression signal FPS.

[0017] In one embodiment of the present application, the level signal generation module includes: a light output level module, a light leakage level module, and a first pulse suppression level module;

[0018] The level signals include: a light output level signal, a light leakage level signal, and a first pulse suppression level signal.

[0019] Correspondingly, the present invention further provides a multi-mode adaptive radio frequency Q drive control method, including:

[0020] Obtaining external signals;

[0021] Outputting control signals according to the external signals and the preset working modes;

[0022] Outputting a PK_Feed signal according to the control signals and the level signals;

[0023] Performing mixing processing on the fundamental frequency signal and the PK_Feed signal;

[0024] Converting the signal after the mixing processing into a radio frequency signal;

[0025] Converting the radio frequency signal and the pump light into laser output.

[0026] In one embodiment of the present application, the preset working modes include: a level mode, an edge trigger mode, and a first pulse suppression mode.

[0027] In one embodiment of the present application, in the level mode, the external signals include high-low level signals, the control signals include a light output signal Modin and a light leakage signal PK, and the level signals include a light leakage level signal and a light output level signal.

[0028] In an embodiment of the present application, in the edge trigger mode, the external signal includes a PWM signal, the control signal includes a light output signal Modin and a light leakage signal PK, and the level signal includes a light output level signal.

[0029] In an embodiment of the present application, in the first pulse suppression mode, the external signal includes an external first pulse suppression signal and a PWM signal, the control signal includes a light output signal Modin, a light leakage signal PK, and a first pulse suppression signal FPS, and the level signal includes a light output level signal.

[0030] The beneficial effects of the present invention are as follows: By using a digital - analog switch to replace the traditional mechanical switch in the multi - mode adaptive radio frequency Q - drive control device of the present invention, the problem of contact disconnection caused by poor contact or long - term operation is significantly reduced, thereby improving the stability and reliability of the entire laser signal modulation system. The use of a programmable logic controller allows users to flexibly customize the signal processing logic according to specific requirements, enabling the system to adapt to a variety of different application scenarios. In addition, users can easily add new working modes without large - scale modification of the hardware, which greatly enhances the scalability of the system. The programmable logic device can achieve high - frequency operation, is suitable for fast data processing and real - time applications, and can reduce signal delay and improve the system response speed.

[0031] Other features and advantages of the present invention will be described in the following specification, and, in part, will be obvious from the specification, or will be understood by implementing the present invention. The objectives and other advantages of the present invention are achieved and obtained by the structures specifically pointed out in the specification and the drawings.

[0032] To make the above - mentioned objectives, features, and advantages of the present invention more obvious and understandable, the following specific preferred embodiments are given, and in conjunction with the accompanying drawings, the detailed description is as follows. Brief Description of the Drawings

[0033] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the following - described drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0034] Figure 1 is a schematic diagram of a multi - mode adaptive radio frequency Q - drive control device according to an embodiment of the present invention;

[0035] Figure 2 is a schematic diagram of a light output level module according to an embodiment of the present invention;

[0036] Figure 3Schematic diagram of the leakage light level module according to an embodiment of the present invention;

[0037] Figure 4 Schematic diagram of the first pulse suppression level module according to an embodiment of the present invention;

[0038] Figure 5 Schematic diagram of the signal of the level mode according to an embodiment of the present invention;

[0039] Figure 6 Schematic diagram of the signal of the edge trigger mode according to an embodiment of the present invention;

[0040] Figure 7 Schematic diagram of the signal of the first pulse suppression mode according to an embodiment of the present invention. Detailed implementation manners

[0041] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0042] See Figure 1 , in an embodiment, the multi-mode adaptive radio frequency Q drive control device includes: a programmable logic controller (FPGA) connected to an external signal generation module, a digital-to-analog switch connected to the programmable logic controller, a level signal generation module and a mixer connected to the digital-to-analog switch, a fundamental frequency module and a radio frequency output module connected to the mixer, and a laser output module connected to the radio frequency output module; wherein the programmable logic controller is used to output a control signal according to the external signal generated by the external signal generation module and a preset working mode; the digital-to-analog switch is used to output a PK_Feed signal according to the control signal and the level signal generated by the level signal generation module; the fundamental frequency module is used to output a fundamental frequency signal; the mixer is used to perform mixing processing on the fundamental frequency signal and the PK_Feed signal; the radio frequency output module is used to convert the signal after mixing processing into a radio frequency signal; the laser output module is used to convert the radio frequency signal and the pump light into laser output.

[0043] In this embodiment, the multi-mode adaptive radio frequency Q drive control device flexibly realizes mode customization through digital control and programmable logic, and at the same time avoids the problems of poor contact of mechanical switches and the risk of misoperation in manual operation.

[0044] In one embodiment, the external signals include: an external first light output signal, an external second light output signal, and an external first pulse suppression signal; the external first light output signal is a high-low level signal; the external second light output signal is a PWM signal. Optionally, the user sets the light output parameters of the laser on the host computer of the marking control card according to the processing requirements, and sends these parameters to the marking board card, and the board card generates corresponding external signals to drive the laser to complete the processing task.

[0045] In one embodiment, the preset working modes include: a level mode, an edge trigger mode, and a first pulse suppression mode. In one embodiment, the control signals include: a light output signal Modin, a light leakage signal PK, and a first pulse suppression signal FPS. An FPGA is a programmable integrated circuit chip with a large number of programmable logic units and I / O interfaces; the designed working mode program is burned on the FPGA. After the user sets different modes, different external signals corresponding to different modes are input to the FPGA, and the FPGA outputs Modin, PK, or FPS signals through the I / O ports according to the selected mode and the external signals.

[0046] In one embodiment, the level signal generation module includes: a light output level module, a light leakage level module, and a first pulse suppression level module; the level signals include: a light output level signal, a light leakage level signal, and a first pulse suppression level signal.

[0047] Optionally, the programmable logic controller (FPGA) can be but is not limited to LFE5U-25F-7BG256I provided by LATTICE (Lattice Semiconductor). As the core of the system, the FPGA receives the external first light output signal, the external second light output signal, and the external first pulse suppression signal. According to these input signals and the preset working modes (including the level mode, the edge trigger mode, and the first pulse suppression mode), the FPGA outputs Modin, PK, and FPS signals to control the digital analog switch. These signals can accurately control the on-off time of the light leakage level, the light output level, and the first pulse suppression level, so as to realize the laser output in different modes.

[0048] Optionally, the digital analog switch can be but is not limited to ADG713BRUZ provided by ADI (Analog Devices). It is a CMOS low-voltage four-channel single-pole single-throw (SPST) analog switch. This device supports a working voltage range of 1.8V to 5.5V, has a turn-on resistance as low as 4Ω, and a bandwidth as high as 200MHz. As an alternative to traditional mechanical switches, this digital analog switch effectively reduces the risk of poor contact and can accurately control the light leakage level, the light output level, and the first pulse suppression level signals according to the output control signals of the FPGA.

[0049] See Figure 2, the output optical level module can be implemented by, but not limited to, two voltage-dividing resistors to generate an output optical level signal for adjusting the operating state of the laser to ensure the stability and accuracy of the laser.

[0050] See Figure 3 , the leakage optical level module can be implemented by, but not limited to, a DAC chip MCP4921-E / SN to generate a leakage optical level for adjusting the leakage state of the laser to ensure the stability and accuracy of the laser. The leakage optical level needs to be set differently for different machines, so a DAC chip is required to set a level. (The leakage optical level is an analog signal).

[0051] See Figure 4 , the first pulse suppression level module can be implemented by, but not limited to, a module circuit built with the FDV301N chip. This module generates a first pulse suppression level signal for eliminating the first pulse in the laser output and improving the stability of the laser output. The first pulse suppression level module can be implemented by, but not limited to, using the MOS transistor FDV301N to build a capacitor charge and discharge circuit to achieve the level rise time and slope required for first pulse suppression.

[0052] The fundamental frequency module can be implemented by, but not limited to, a crystal oscillator SIT8008AC-23-33E-80.000000 provided by SITIME to generate a fundamental frequency signal, which is mixed with the analog switch output signal PK_Feed. PK_Feed is an internal control signal coupled after controlling the digital switch by the FPGA chip and is used for modulating the RF output.

[0053] The mixer can be implemented by, but not limited to, an LMH6503MT broadband, low-power, linearly variable gain amplifier provided by TI (Texas Instruments), which supports differential input and single-ended operation. This device receives the fundamental frequency signal and the output of the digital-to-analog switch, performs mixing processing, and generates an RF signal.

[0054] The RF output module and the laser output module can be implemented by, but not limited to, a circuit built with TQP3M9008 and AFT09MS015NT1. The RF output module converts the mixed signal into an RF output, while the laser output module converts the RF signal and the pump light into a laser output, which is applied to various fields such as communication, measurement, or medical treatment.

[0055] Based on the above embodiments, an embodiment of the present invention further provides a multi-mode adaptive RF Q drive control method, including: obtaining an external signal; outputting a control signal according to the external signal and a preset operating mode; outputting a PK_Feed signal according to the control signal and a level signal; performing mixing processing on the fundamental frequency signal and the PK_Feed signal; converting the mixed signal into an RF signal; and converting the RF signal and the pump light into a laser output.

[0056] In some application scenarios, the preset working modes include: level mode, edge trigger mode, and first pulse suppression mode.

[0057] See Figure 5 , in the level mode, the external signal includes high and low level signals, the control signal includes the light output signal Modin and the light leakage signal PK, and the level signal includes the light leakage level signal and the light output level signal. Specifically, the customer gives a fixed high or low level light output signal 1 (0 or 5V) to the laser; when the laser selects low level light output, the customer gives 0V for corresponding light output; when the laser selects high level, the customer gives a 5V signal for the laser to output light. The output repetition frequency of the laser (the frequency signal of the laser light output) is determined by the inside of the laser.

[0058] See Figure 6 , in the edge trigger mode, the external signal includes the PWM signal, the control signal includes the light output signal Modin and the light leakage signal PK, and the level signal includes the light output level signal. The customer gives a light output signal 2, and the signal includes the light output frequency and the duty cycle. Inside the laser, the rising edge (0 to 5V) or the falling edge (5 to 0V) mode can be selected. When the rising edge light output mode is selected, the laser will output light at the rising edge of the light output signal 2, and there will be one pulse of laser for each rising edge. When the falling edge light output mode is selected, the laser will output light at the falling edge of the light output signal 2, and there will be one pulse of laser for each falling edge.

[0059] See Figure 7 , in the first pulse suppression mode, the external signal includes the external first pulse suppression signal and the PWM signal, the control signal includes the light output signal Modin, the light leakage signal PK, and the first pulse suppression signal FPS, and the level signal includes the light output level signal. Specifically, the first pulse suppression mode is to suppress and reduce the energy of the first light output pulse. Since the energy of the first light pulse has overshoot, which is not what the customer needs, it is necessary to suppress the first pulse before each light output. This mode requires the first pulse suppression signal (5V or 0V high and low level) and the light output signal 2 to be used in combination. Before normal light output, the customer needs to give a high level 5V of the first pulse suppression signal in advance. After this level ends, then give the normal light output signal 2, and at the same time, the first pulse suppression signal needs to be given 0V, and the laser will suppress the laser with too high energy of the first pulse during normal light output.

[0060] In some application scenarios, when the system starts up, the FPGA loads a preset program and waits for external signals: the light output signal 1, the light output signal 2, and the first pulse suppression signal. After the external signals enter the FPGA, the Modin, PK, and FPS signals are jointly determined by the mode set by the user and the external signals. Finally, the laser output required by the user is obtained. At the same time, the leakage level module and the light output level module provide the Modin and PK signals to ensure that the digital - analog switch works in the correct state. The first pulse suppression signal module generates a suppression signal when needed to improve the stability of the laser. The fundamental frequency signal generated by the fundamental frequency module is mixed with the light output signal processed by the FPGA in a mixer to generate a radio - frequency signal. This radio - frequency signal is then processed by the radio - frequency output module and finally converted into a laser signal by the laser output module for practical applications. The user can interact with the FPGA through a software interface to define new signal - processing logics or modify existing logics. This allows the user to customize the working mode of the system according to needs or add new modes to adapt to different application scenarios. The programmability of the FPGA ensures the high flexibility and scalability of the system.

[0061] In summary, the multi - mode adaptive radio - frequency Q - drive control device of the present invention has the following technical effects:

[0062] 1. Improve system stability: By using a digital - analog switch to replace the traditional mechanical switch, this device significantly reduces the problem of contact disconnection caused by poor contact or long - term operation, thereby improving the stability and reliability of the entire laser signal modulation system. Repeatability, it can be used in different projects. In this way, a large amount of design time and cost can be saved, and repeated design and manufacturing of similar circuits can be avoided.

[0063] 2. Enhance flexibility and scalability: The use of a programmable logic controller allows users to flexibly customize signal - processing logics according to specific needs, enabling the system to adapt to a variety of different application scenarios. In addition, users can easily add new working modes without major hardware modifications, which greatly enhances the scalability of the system. Performance advantages, programmable logic devices can achieve high - frequency operations, are suitable for fast data processing and real - time applications, and can reduce signal delay and improve the system response speed.

[0064] 3. Reduce the risk of manual operation: The design of the system reduces the dependence on manual operation, especially during the signal modulation process. Through digital control, the system can automatically execute preset logic programs, thereby reducing the risk of misoperation caused by improper manual operation.

[0065] 4. Improve signal quality: The introduction of the first pulse suppression signal module effectively eliminates the first pulse in the laser output, improving the purity and quality of the signal, which is particularly important for high - precision laser applications.

[0066] 5. Simplify the maintenance and upgrade process: Due to the high digitization and programmability of the system, the maintenance and upgrade processes become much simpler. The system can achieve function upgrades or repairs through software updates without the need for complex hardware replacements.

[0067] 6. Strong adaptability: The system is designed to be able to adapt to different working environments and conditions, including different temperature, humidity, and electromagnetic interference environments, which benefits from the high adaptability and stability of the digital analog switch.

[0068] 7. Cost-effectiveness: Although the initial investment may be slightly higher, in the long run, this system has higher cost-effectiveness due to the reduction of mechanical components and maintenance costs.

[0069] All the devices (components without specific structures described) selected in this application are common standard parts or parts known to those skilled in the art. Their structures and principles can be known to those skilled in the art through technical manuals or obtained through conventional experimental methods.

[0070] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection", and "coupling" shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0071] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0072] In several embodiments provided in the present application, it should be understood that the disclosed systems, devices, and methods can be implemented in other ways. The device embodiments described above are merely illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For another example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed coupling or direct coupling or communication connection between each other can be through some communication interfaces. The indirect coupling or communication connection of the devices or units can be in electrical, mechanical, or other forms.

[0073] The units described as separate components may or may not be physically separated. The components displayed as units may or may not be physical units, that is, they can be located in one place or distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0074] In addition, in each embodiment of the present invention, the functional units can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit.

[0075] Based on the above inspiration from the ideal embodiments of the present invention, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of the present invention. The technical scope of the present invention is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A multi-mode adaptive radio frequency Q-drive control device, characterized in that: include: A programmable logic controller, used for outputting a control signal according to an external signal generated by an external signal generating module and a preset working mode; A digital analog switch, used for outputting a PK_Feed signal according to a control signal and a level signal generated by a level signal generating module; A baseband module, used for outputting a baseband signal; A mixer, used for mixing the baseband signal and the PK_Feed signal; A radio frequency output module, used for converting the mixed signal into a radio frequency signal; The laser output module is used to convert the RF signal and pump light into laser output.

2. The multi-mode adaptive RF Q-drive control device according to claim 1, characterized in that: The external signal includes: an external first light output signal, an external second light output signal and an external first pulse suppression signal; The external first outgoing light signal is a high or low level signal; The external second light output signal is a PWM signal.

3. The multi-mode adaptive RF Q-drive control device according to claim 1, characterized in that: The preset working modes include: level mode, edge trigger mode and first pulse suppression mode.

4. The multi-mode adaptive RF Q-drive control device according to claim 1, characterized in that: The control signal includes: a light output signal Modin, a light leakage signal PK and a first pulse suppression signal FPS.

5. The multi-mode adaptive RF Q-drive control device according to claim 1, characterized in that: The level signal generating module comprises: a light output level module, a light leakage level module and a first pulse suppression level module; The level signal includes: a light output level signal, a light leakage level signal and a first pulse suppression level signal.

6. A multi-mode adaptive RF Q-drive control method, characterized in that: include: Get external signals; Output control signals according to external signals and preset working modes; Output PK_Feed signal according to control signal and level signal; Perform mixing processing on the baseband signal and the PK_Feed signal; Convert the mixed signal into a radio frequency signal; Converts RF signal and pump light into laser output.

7. The multi-mode adaptive RF Q-drive control method according to claim 6, characterized in that: The preset working modes include: level mode, edge trigger mode and first pulse suppression mode.

8. The multi-mode adaptive RF Q-drive control method according to claim 7, characterized in that: In the level mode, the external signal includes high and low level signals, the control signal includes the light output signal Modin and the light leakage signal PK, and the level signal includes the light leakage level signal and the light output level signal.

9. The multi-mode adaptive RF Q-drive control method according to claim 7, characterized in that: In the edge trigger mode, the external signal includes a PWM signal, the control signal includes a light output signal Modin and a light leakage signal PK, and the level signal includes a light output level signal.

10. The multi-mode adaptive RF Q-drive control method according to claim 7, characterized in that: In the first pulse suppression mode, the external signal includes an external first pulse suppression signal and a PWM signal, the control signal includes a light output signal Modin, a light leakage signal PK and a first pulse suppression signal FPS, and the level signal includes a light output level signal.

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