Laser pump source driver and laser

Abstract

This application relates to the field of laser processing technology and discloses a laser pump source driver and a laser, comprising: a control module connected to each constant current source module for outputting a given voltage to the designated and connected constant current source modules; a constant voltage source module connected to each constant current source module for supplying power to the constant current source modules; a first terminal of the constant current source module connected to the control module, a second terminal connected to the constant voltage source module, and a third terminal connected to the pump source for outputting a drive current under the given voltage of the control module to drive the pump source to emit laser light. This application can reduce the redundancy of the internal circuit of the driver, reduce the use of internal wires and components, reduce the complexity of the internal structure, realize the integration and miniaturization of the driver, improve the reliability and production efficiency of the laser, and reduce production costs. Furthermore, it can control any pump source to excite laser light according to actual needs, meeting different laser power requirements, especially high-power optical requirements.

Description

Technical Field

[0001] This application relates to the field of laser processing technology, and in particular to a laser pump source driver and a laser. Background Technology

[0002] To meet the demands of large-scale processing in the market, it is necessary to develop high-power lasers, which in turn requires the support of high-power electrical modules.

[0003] In existing technologies, when it is necessary to develop drivers for high-power or high-power laser pump sources, multiple electrical components need to be connected in parallel within the driver to meet the requirements of high-power optics. This inevitably leads to more complex internal structures of the driver and even the laser, complicated manufacturing and assembly, reduced production efficiency, and increased production costs. Utility Model Content

[0004] The main objective of this application is to provide a laser pump source driver and a laser, which aims to solve the technical problems in the prior art, such as the need to connect multiple electrical components in parallel to meet the requirements of high-power lasers, resulting in a complex internal structure of the laser.

[0005] The first aspect of this application provides a laser pump source driver, which includes: a control module, a constant voltage source module, and at least one constant current source module;

[0006] The control module is connected to each of the constant current source modules and is used to output their respective given voltages to the designated and connected constant current source modules.

[0007] The constant voltage source module is connected to each of the constant current source modules and is used to provide power supply voltage to each of the constant current source modules.

[0008] Each constant current source module has its first end connected to the control module, its second end connected to the constant voltage source module, and its third end connected to a pump source. It is used to output a drive current that matches the given voltage under the given voltage of the control module, and to drive the connected pump source to emit laser light using the drive current.

[0009] As a preferred embodiment, the pump source driver further includes a monitoring module, which is connected to the control module and sends various monitoring data to the host computer. The monitoring data includes at least the voltage value supplied by the constant voltage source module to each constant current source and the drive current value output by each constant current source module.

[0010] As a preferred embodiment, the laser pump source driver further includes: an anti-misfire light emission module located between the control module and the constant current source module;

[0011] The first end of the anti-misfire light emission module is connected to the control module, and the second end is connected to the corresponding constant current source module.

[0012] As a preferred embodiment, in the anti-false light output module, the inverting input terminal of the first operational amplifier is connected to the control module via a first resistor, and the inverting input terminal is also connected to the first power supply terminal via a first diode. The non-inverting input terminal of the first operational amplifier is connected to the first power supply terminal via a second resistor, and the non-inverting input terminal is also grounded via a third resistor. The negative power supply terminal of the first operational amplifier is grounded, and the positive power supply terminal is connected to the second power supply terminal. The positive power supply terminal of the first operational amplifier is also connected to the negative power supply terminal via a first capacitor. The output terminal of the first operational amplifier is grounded via a second diode, a fourth resistor, and a third resistor. The output terminal of the first operational amplifier is also connected to the third power supply terminal via a fifth resistor. The output terminal of the first operational amplifier is also connected to the gate of the first MOS transistor via a sixth resistor. The output terminal of the first operational amplifier is also grounded via a sixth resistor and a seventh resistor. The output terminal of the first operational amplifier is also grounded via a sixth resistor and a second capacitor. The source of the first MOS transistor is grounded, and the drain is connected to the voltage setpoint terminal of the corresponding constant current source module.

[0013] As a preferred embodiment, the laser pump source driver further includes: a light leakage prevention module connected to the control module and at least one constant current source module;

[0014] The first end of the light leakage prevention module is connected to the control module, and the second end is connected to the output control end of the constant current source module.

[0015] As a preferred embodiment, the inverting input terminal of the second operational amplifier in the light leakage prevention module is connected to the control module via an eighth resistor. The inverting input terminal of the second operational amplifier is also connected to the fourth power supply terminal via a third diode, and further connected to the fifth power supply terminal via a fourth diode. The inverting input terminal of the second operational amplifier is also grounded via a third capacitor. The non-inverting input terminal of the second operational amplifier is connected to the fourth power supply terminal via a ninth resistor, and further grounded via a tenth resistor. The non-inverting input terminal of the second operational amplifier is also connected to the second operational amplifier's output terminal via an eleventh resistor. The output terminals are connected as follows: the negative power supply terminal of the second operational amplifier is grounded, and the positive power supply terminal is connected to the fourth power supply terminal. The negative power supply terminal of the second operational amplifier is also connected to the positive power supply terminal through the fourth capacitor. The output terminal of the second operational amplifier is grounded through the fifth capacitor. The output terminal of the second operational amplifier is also connected to the corresponding constant current source module through at least one set of connection units. Each set of connection units includes a fifth diode and a twelfth resistor connected in series. The anode of the fifth diode is connected to the output terminal of the second operational amplifier, the cathode is connected to the first end of the twelfth resistor, and the second end of the twelfth resistor is connected to the output control terminal of the corresponding constant current source module.

[0016] As a preferred embodiment, the laser pump source driver further includes an overheat protection module connected to the control module, wherein the overheat protection module disconnects the power supply when the control module detects that the actual temperature of the laser exceeds a temperature threshold.

[0017] As a preferred embodiment, the laser pump source driver further includes: an auxiliary power supply module;

[0018] The auxiliary power module is connected to the control module and is used to supply power to the control module.

[0019] As a preferred embodiment, the control module is also used to simultaneously perform hardware sampling on the connected constant current source module to obtain the drive current output by the constant current source module.

[0020] A second aspect of this application also provides a laser, said laser comprising a laser pump source driver as described in any of the above embodiments and at least one pump source.

[0021] The laser pump source driver is connected to the pump source and is used to drive the pump source;

[0022] The pump source is used to emit laser light under drive.

[0023] Compared to existing technologies, this application realizes a highly integrated high-power laser pump source driver, which has the following advantages:

[0024] 1. By sharing the same control module and constant voltage source module through multiple constant current source modules, there is no need to set up multiple parallel and independently designed electrical components in the driver. This can reduce the redundancy of the driver and laser internal circuits, reduce the use of internal wires and components, reduce the complexity of the internal structure, realize the integration and miniaturization of the driver, improve the reliability and production efficiency of the laser, and reduce production costs.

[0025] 2. Using the driver of this application, any pump source can be controlled to excite laser according to actual needs, meeting different laser power requirements, especially high-power optical requirements;

[0026] 3. The control module can precisely output the corresponding given voltage to each designated constant current source module. Each constant current source module then outputs a drive current that is strictly matched to the given voltage. This ensures a high degree of consistency in the drive current output by each constant current source module, avoiding pump source instability caused by current fluctuations or differences. When the driver connects multiple pump sources, each pump source operates under a consistent drive current, ensuring that the parameters of their emitted lasers remain stable and consistent, thereby improving the output quality and stability of the entire laser system. Attached Figure Description

[0027] Figure 1 This is a structural block diagram of the first embodiment of the laser pump source driver in this application.

[0028] Figure 2 This is a circuit diagram of the anti-misfire optical module in an embodiment of this application;

[0029] Figure 3 This is a circuit diagram of a constant current source module in one embodiment;

[0030] Figure 4 This is a circuit diagram of the light leakage prevention module in an embodiment of this application;

[0031] Figure 5 This is a structural block diagram of a laser in one embodiment of this application;

[0032] Figure 6-1 This is a schematic diagram of current synchronization in existing technology;

[0033] Figures 6-2 to 6-4 This is a schematic diagram illustrating the synchronization of current channels in an embodiment of this application;

[0034] Figures 7-1 to 7-5 This is a schematic diagram of the rise time of each current in the embodiments of this application. Detailed Implementation

[0035] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a particular order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments described herein can be implemented in a sequence other than that illustrated or described herein. Furthermore, the terms “comprising” or “having,” and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0036] Laser processing is a novel processing method. Lasers are an indispensable core component of modern laser processing systems. New lasers offer advantages such as small size, light weight, high efficiency, high power, low energy consumption, and long lifespan, improving processing efficiency and quality while reducing costs. With continuous industrial development, industrial processing requirements are becoming increasingly demanding. To adapt to these new requirements, laser processing technology is evolving, and lasers are constantly being updated. To meet the demands of large-scale processing in the market and adapt to various processing needs, high-power lasers are indispensable, hence their development.

[0037] To meet the demands of high-power lasers, high-power electrical modules are required. The power density, efficiency, and product quality of the laser's pump source driver, i.e., the electrical components, need to be continuously increased to satisfy the requirements of high-power lasers. At the same time, it is also necessary to ensure that the laser design is simple, low-cost, operates stably and reliably, and is easy to maintain.

[0038] In existing technologies, the original mode of lasers involves numerous internal wires, complex communication protocols, multiple communication links, and fragmented and complex data, resulting in high overall costs. The numerous component units also contribute to a relatively high failure rate. Production and assembly are complex and require high production standards, hindering production and cost control for enterprises. When developing drivers for high-power laser pump sources, multiple electrical components need to be connected in parallel to meet high-power optics requirements. For example, the existing laser driver section, i.e., the electrical components, includes: AC / DC constant voltage source, constant current source, auxiliary power supply, monitoring components, etc. If multiple pump sources need to be driven, multiple electrical components are required, necessitating independent design. This redundant and repetitive design undoubtedly leads to an abnormally complex internal structure of the laser or driver, reducing production efficiency and increasing production costs.

[0039] Based on this, this application provides a laser pump source driver and a laser.

[0040] refer to Figure 1 In one embodiment of this application, a laser pump source driver is provided, which includes: a control module 10, a constant voltage source module 20 and at least one constant current source module 30;

[0041] The control module 10 is connected to each constant current source module 30 and is used to output the corresponding given voltage to the specified and connected constant current source module 30.

[0042] The constant voltage source module 20 is connected to each constant current source module 30 and is used to provide DC power supply voltage to each constant current source module 30.

[0043] Each constant current source module 30 has its first end connected to the control module 10, its second end connected to the constant voltage source module 20, and its third end connected to a pump source. It is used to output a drive current that matches the given voltage under the given voltage of the control module 10, and to drive the connected pump source to emit laser using the drive current.

[0044] Specifically, the control module 10 can be connected to multiple constant current source modules 30, and can simultaneously control one or more constant current source modules 30. Each constant current source module 30 corresponds to a pump source, used to output drive current to the connected pump source. The pump source is part of the optical part of the laser and is one of the essential core components in solid-state lasers and fiber lasers. It has the characteristics of emitting laser signals, small size, compact structure, high photoelectric conversion, and stable performance. The pump source includes a laser diode array, which is formed by connecting laser diodes in series and parallel.

[0045] The control module 10 can control which constant current source modules 30 output drive currents can be set and specified according to actual needs, and this application does not impose any restrictions on this.

[0046] The constant current source module 30 corresponds one-to-one with the pump source. The drive current output by the constant current source module 30 is adjustable. For example, the current range is 0-45A. If the given voltage of the control module 10 is 4.5V, the constant current source module 30 will output a drive current of 45A; if the given voltage of the control module 10 is 1V, the constant current source module 30 will output a drive current of 10A; if the given voltage of the control module 10 is 4V, the constant current source module 30 will output a drive current of 40A, etc. The specific settings are based on the actual situation, and this application does not impose any restrictions on this.

[0047] The constant current source module 30 can output a drive current that matches the given voltage, and the drive current can be used to drive the connected pump source to emit laser.

[0048] The constant voltage source module 20 is used to convert AC voltage, such as single-phase AC or three-phase AC, into a supply voltage, such as 100V DC. The constant voltage source module 20 supplies power to all constant current source modules 30 and is a shared power source.

[0049] In one embodiment, the pump source driver further includes a monitoring module 40, which is connected to the control module 10 and sends various monitoring data to the host computer. The monitoring data includes at least the voltage value supplied by the constant voltage source module to each constant current source and the drive current value output by each constant current source module, so as to analyze the working status of the driver and ensure that the current and voltage outputs are normal.

[0050] Optionally, the monitoring data may also include the real-time operating temperature of each pump source.

[0051] In the prior art, the laser driver contains multiple electrical components, each of which includes a constant voltage source, a constant current source, an auxiliary power supply, and a monitoring section. This means that each electrical component is designed independently, and this non-shared design inevitably leads to redundancy in the driver and laser circuitry.

[0052] In this embodiment, the same control module 10 acts as a monitoring part to simultaneously control multiple constant current source modules 30, and the same constant voltage source module 20 supplies power to the multiple constant current source modules 30. Therefore, this embodiment can better realize the integration and consolidation of the internal circuit of the laser.

[0053] The high-power laser driver in this embodiment is simplified based on the existing technology. By sharing some circuit modules, it can achieve the increased power requirements without having to multiply the number of components. This reduces the material cost of electrical components. Due to the reduction of electronic components, the reliability of the electrical modules in the driver can also be reduced, assembly difficulty can be reduced, labor costs can be reduced, and the difficulty of the control part can be reduced, control failures can be reduced, product quality can be improved, and it is more convenient for customers to use.

[0054] Controlling one electrical module is more convenient, reliable, and logically clear than controlling multiple electrical modules. It reduces uncertainties, allows for better correlation, and better ensures safety during use.

[0055] This embodiment uses a control module 10 to control multiple pump sources, which facilitates more intelligent power matching. It can shut down some pump sources according to power requirements, achieving the purpose of multi-purpose use and reducing power consumption.

[0056] This embodiment can control multiple constant current source modules 30 through a single control module 10, effectively achieving drive synchronization. For example, within 10ms or 5ms, the current in the drive lines of the specified constant current source modules 30 can rise from 0A to the specified current. In contrast, existing technologies often use different control modules 10, making synchronization impossible, or it may take up to 25ms to achieve synchronization, which is slow.

[0057] This embodiment realizes a highly integrated high-power laser pump source driver. By sharing the same control module 10 and constant voltage source module 20 through multiple constant current source modules 30, it is not necessary to set up multiple parallel and independently designed electrical components in the driver. This can reduce the redundancy of the driver and laser internal circuits, reduce the use of internal wires and components, reduce the complexity of the internal structure, realize the integration and miniaturization of the driver, improve the reliability and production efficiency of the laser, reduce production costs, and control any pump source to excite the laser according to actual needs, so as to meet different laser power requirements, especially high-power optical requirements.

[0058] In one embodiment, the laser pump source driver further includes: a component located between the control module 10 and the constant current source module 30, such as... Figure 2 The module shown is designed to prevent accidental light output.

[0059] In this application, the first end of the anti-misfire light output module is connected to the control module 10, and the second end is connected to the corresponding constant current source module 30. If the given voltage output by the control module 10 is obtained, the corresponding constant current source module 30 is controlled to output the drive current. If the circuit interference voltage is obtained, the corresponding constant current source module 30 is prohibited from outputting the drive current.

[0060] Specifically, in this embodiment, an anti-misfire light output module is connected to a constant current source module 30.

[0061] External interference signals, white noise, or interference voltages may exist in the laser. These interference signals may be mistakenly used as the driver's input signal or input voltage, such as 0.5V, 0.6V, or 0.8V, causing the laser to emit light incorrectly. To overcome the problem of laser erroneous emission caused by interference signals, this embodiment provides an anti-erroneous emission module.

[0062] This anti-misfire laser emission module can receive both the normal output voltage or given voltage signal from the control module 10 and external interference signals (external interference given signals). Normally, the normal output voltage of the control module 10 is higher than the external interference signal, which is typically small in amplitude. Therefore, when the anti-misfire laser emission module receives a higher given voltage from the control module 10, it allows the corresponding constant current source module 30 to output its drive current normally, thus allowing the corresponding pump source to emit laser light. For example, if the anti-misfire laser emission module outputs the given voltage to the constant current source module 30, the constant current source module 30 can operate normally.

[0063] When the anti-false light emission module receives a small voltage of circuit interference, it will disable the corresponding constant current source module 30 from outputting drive current. For example, the voltage output to the constant current source module 30 will be 0 or extremely small, so that the constant current source module 30 cannot work properly.

[0064] This embodiment, by adding an anti-false light emission module to the laser pump source driver, can effectively prevent external interference signals from causing the constant current source module 30 to malfunction and generate false drive current, thereby causing the laser to emit false light, thus effectively improving the safety of laser use.

[0065] In one embodiment, please refer to Figure 2In the anti-misoperation optical module, the inverting input terminal of the first operational amplifier is connected to the control module 10 through the first resistor, and the inverting input terminal is also connected to the first power supply terminal through the first diode. The non-inverting input terminal of the first operational amplifier is connected to the first power supply terminal through the second resistor, and the non-inverting input terminal is also grounded through the third resistor. The negative power supply terminal of the first operational amplifier is grounded, and the positive power supply terminal is connected to the second power supply terminal. The positive power supply terminal of the first operational amplifier is also connected to the negative power supply terminal through the first capacitor. The output terminal of the first operational amplifier is grounded through the second diode, the fourth resistor, and the third resistor. The output terminal of the first operational amplifier is also connected to the third power supply terminal through the fifth resistor. The output terminal of the first operational amplifier is also connected to the gate of the first MOS transistor through the sixth resistor. The output terminal of the first operational amplifier is also grounded through the sixth resistor and the seventh resistor. The output terminal of the first operational amplifier is also grounded through the sixth resistor and the second capacitor. The source of the first MOS transistor is grounded, and the drain is connected to the voltage setpoint terminal of the corresponding constant current source module 30.

[0066] Specifically, in the anti-misfire optical module, the inverting input terminal of the first operational amplifier U26A is connected to the D / A terminal of the control module 10 through a first resistor R136 (e.g., R0603, 100KR,F). The inverting input terminal is also connected to the first power supply terminal (e.g., +5V) through a first diode D12 (e.g., D12 is BAS516). The non-inverting input terminal of the first operational amplifier U26A is connected to the first power supply terminal through a second resistor R202 (e.g., R202 is R0603, 30KR,F). The non-inverting input terminal is also grounded through a third resistor R135 (e.g., R0603, 1KR,F). The negative power supply terminal of the first operational amplifier U26A is grounded, and the positive power supply terminal is connected to the second power supply terminal (e.g., +5V). The positive power supply terminal of the first operational amplifier U26A is also connected to the negative power supply terminal through the first capacitor C163 (e.g., C0603, 4.7uF, 25V). The output terminal of the first operational amplifier U26A is grounded through the second diode D51 (e.g., BAS316), the fourth resistor R129 (e.g., R0603, 10KR,F), and the third resistor R135 (e.g., R0603, 1KR,F). The output terminal of the first operational amplifier U26A is also connected to the third power supply terminal (e.g., +5V) through the fifth resistor R203 (e.g., R0603, 2KR,F). The output of the first operational amplifier U26A is also connected to the gate (G) of the first MOSFET Q36 (e.g., 2N7002K) through the sixth resistor R82 (e.g., R0603, 100RF). The output of the first operational amplifier U26A is also grounded through the sixth resistor R82 and the seventh resistor R208 (e.g., R0603, 10KR,F). The output of the first operational amplifier U26A is also grounded through the sixth resistor R82 and the second capacitor C54 (e.g., C0603, 10nF, 50V). The source (S) of the first MOSFET Q36 is grounded, and the drain (D) is connected to the voltage setpoint of the corresponding constant current source module 30.

[0067] Figure 3 Here is a circuit diagram of the constant current source module 30 in one embodiment; see reference. Figure 3 The voltage setpoint of the constant current source module 30 is connected to the drain (D) of the first MOSFET Q36, and can be used as a voltage input DAC.

[0068] The first MOS transistor is, for example, an NMOS transistor.

[0069] The D / A terminal of the control module 10 is used to convert the numerical control command output by the control module 10 as a digital signal into a given voltage of an analog signal, and to provide the given voltage to the anti-misfire light output module.

[0070] Alternatively, the driver may also include a digital-to-analog converter module, whereby the control module 10 outputs digital control commands, the digital-to-analog converter module converts the control commands into a given voltage, and provides the given voltage to the anti-misfire light output module.

[0071] Furthermore, if the control module 10 does not output a given voltage to the first resistor R136, the first resistor R136 may also receive an interference given signal.

[0072] The first operational amplifier U26A can be, for example, a TPA1882-SR operational amplifier. Furthermore, the first operational amplifier can function as a comparator in the circuit.

[0073] The drain of the first MOSFET can be connected to the power supply terminal via a resistor. When the first MOSFET is not turned on, the drain is at a high level.

[0074] The working principle of the anti-misfire optical module is as follows:

[0075] The first operational amplifier acts as a comparator. Its non-inverting input is divided by two resistors (R135 and R202) to obtain a reference voltage, comparison base value, or reference threshold. Generally, the amplitude of interference signals is very low, while the amplitude of the given voltage of the control module 10 is relatively high. If the amplitude of the input signal at the D / A terminal is too low, below the reference voltage, the comparator outputs a high level. This high level drives the NMOS transistor Q36 to conduct, pulling its drain low. The drain of the NMOS transistor Q36 is connected to the voltage setpoint of the constant current source module 30. With the drain pulled low, the input voltage DAC at the voltage setpoint of the constant current source module 30 is also low. Therefore, the constant current source module 30 will not output drive current, and consequently, the corresponding pump source will not emit light erroneously.

[0076] If the input signal at the D / A terminal is a given voltage, the amplitude will be high, exceeding the reference voltage. The comparator will then output a low level. This low level will cause the NMOS transistor Q36 to turn off or not conduct. The drain of the NMOS transistor Q36 will be released and will not be pulled low, resulting in a high level at the drain. Consequently, the input voltage DAC at the voltage setting terminal of the constant current source module 30 will also be high. Therefore, the constant current source module 30 will output the corresponding drive current Iout, and the corresponding pump source will emit light normally.

[0077] In the prior art, if the driver does not add a module to prevent false light emission, the voltage setpoint of the constant current source module 30 is directly connected to the control module 10. If the control module 10 does not output a setpoint voltage, but there is interference voltage in the circuit, the voltage setpoint of the constant current source module 30 will receive the interference voltage, which will lead to false light emission.

[0078] This embodiment, by adding an anti-false light emission module to the laser pump source driver, can effectively prevent external interference signals from causing the constant current source module 30 to malfunction and generate false drive current, thereby causing the laser to emit false light, thus effectively improving the safety of laser use.

[0079] In one embodiment, the laser pump source driver further includes a light leakage prevention module connected to the control module 10 and at least one constant current source module 30;

[0080] The first end of the light leakage prevention module is connected to the control module 10, and the second end is connected to the output control terminal of the constant current source module 30. It is used to prevent the constant current source module 30 from outputting the drive current if a threshold current exists.

[0081] Specifically, the light leakage prevention module can receive a drive enable signal or a given voltage from the control module 10, or it can receive a noise signal.

[0082] If the light leakage prevention module receives a noise signal, and the noise signal is small, if there is a threshold current in the drive circuit, the light leakage prevention module will output a drive prohibition signal to the output control terminal of the constant current source module 30.

[0083] like Figure 3 As shown in the constant current source module 30, if the light leakage prevention module receives a noise signal, the light leakage prevention module will output a high level to the common node 10 of the constant current source module 30. At this time, both the non-inverting and inverting inputs of the operational amplifier A2 in the constant current source module 30 are at a high level, and the operational amplifier A2 will not output a low level. The PMOS transistor M2 will not be turned on. Therefore, the constant current source module 30 will not output the drive current Iout. This achieves the purpose of preventing the constant current source module 30 from outputting the drive current, and the corresponding pump source will also be prevented from emitting light.

[0084] The anti-leakage module can prevent the laser from leaking light and causing a safety accident when the drive enable is turned on when there is a threshold current in the drive circuit.

[0085] The light leakage prevention module in this embodiment can be connected to at least one constant current source module 30, which can simultaneously prevent light leakage from multiple pump sources.

[0086] In one embodiment, the inverting input of the second operational amplifier in the light leakage prevention module is connected to the control module 10 via an eighth resistor. The inverting input of the second operational amplifier is also connected to the fourth power supply terminal via a third diode, and to the fifth power supply terminal via a fourth diode. The inverting input of the second operational amplifier is also grounded via a third capacitor. The non-inverting input of the second operational amplifier is connected to the fourth power supply terminal via a ninth resistor, and to the ground via a tenth resistor. The non-inverting input of the second operational amplifier is also connected to the output of the second operational amplifier via an eleventh resistor. The second operational amplifier has its negative power supply terminal grounded and its positive power supply terminal connected to the fourth power supply terminal. The negative power supply terminal of the second operational amplifier is also connected to the positive power supply terminal through the fourth capacitor. The output terminal of the second operational amplifier is grounded through the fifth capacitor. The output terminal of the second operational amplifier is also connected to the corresponding constant current source module 30 through at least one set of connection units. Each set of connection units includes a fifth diode and a twelfth resistor connected in series. The anode of the fifth diode is connected to the output terminal of the second operational amplifier, the cathode is connected to the first end of the twelfth resistor, and the second end of the twelfth resistor is connected to the output control terminal of the corresponding constant current source module 30.

[0087] Specifically, refer to Figure 4In the light leakage prevention module, the inverting input of the second operational amplifier U7A is connected to the ON / OFF terminal of the control module 10 via the eighth resistor R62 (e.g., R0603, 100KR,F). When the ON / OFF signal is weak (low level or insufficient signal strength), it outputs a high level after passing through the operational amplifier. Subsequently, diodes D18-D21 connected to the inputs A1-A4 are all reverse biased. Since diodes are cut off when reverse biased, the circuit is effectively blocked, and no current is output. In this application, the weak signal serves to block the drive circuit and prevent abnormal current from being generated. The inverting input of the second operational amplifier U7A is also connected to the fourth power supply terminal (e.g., +5V) through the third diode D17 (e.g., BAS516). The inverting input of the second operational amplifier U7A is also connected to the fifth power supply terminal CC through the fourth diode D103 (e.g., BAS516). The inverting input of the second operational amplifier U7A is also grounded through the third capacitor C95 (e.g., C0603, 10nF, 50V). The non-inverting input of the second operational amplifier U7A is connected to the fourth power supply terminal (e.g., +5V) through the ninth resistor R35 (e.g., R0603, 10KR,F). The non-inverting input of the second operational amplifier U7A is also grounded through the tenth resistor R65 (e.g., R0603, 3KR,F). The non-inverting input of the second operational amplifier U7A is also connected to the output of the second operational amplifier U7A through the eleventh resistor R89 ​​(e.g., R0603, 510KR,F). The negative power supply terminal of the second operational amplifier U7A is grounded, and the positive power supply terminal is connected to the fourth power supply terminal (e.g., +5V). The negative power supply terminal of the second operational amplifier U7A is also connected to the positive power supply terminal through a fourth capacitor C25 (e.g., C0603, 4.7uF, 25V). The output terminal of the second operational amplifier U7A is grounded through a fifth capacitor C97 (e.g., C0603, 10nF, 50V). The output terminal of the second operational amplifier U7A is also connected to the corresponding constant current source module 30 through at least one set of parallel connection units. Each set of connection units includes a fifth diode and a twelfth resistor connected in series. The anode of the fifth diode is connected to the output terminal of the second operational amplifier U7A, the cathode is connected to the first end of the twelfth resistor, and the second end of the twelfth resistor is connected to the output control terminal of the corresponding constant current source module 30.

[0088] Each connection unit includes a fifth diode and a twelfth resistor connected in series.

[0089] For example, the first connection unit includes a fifth diode D18 (e.g., model BAS516) and a twelfth resistor R31 (e.g., model R0603,1KR,F) connected in series.

[0090] The second connection unit includes a fifth diode D19 (e.g., BAS516) connected in series and a twelfth resistor R32 (e.g., R0603,1KR,F).

[0091] The third connection unit includes a fifth diode D20 (e.g., BAS516) connected in series and a twelfth resistor R33 (e.g., R0603,1KR,F).

[0092] The fourth connection unit includes a fifth diode D21 (e.g., BAS516) connected in series and a twelfth resistor R34 (e.g., R0603,1KR,F).

[0093] The second operational amplifier, for example, is an LM2904DR, which can be used as a comparator in the circuit.

[0094] The working principle of the light leakage prevention module is as follows:

[0095] The second operational amplifier U7A acts as a comparator. Its non-inverting input is divided by two resistors (R65 and R35) to obtain a reference voltage, comparison base value, or reference threshold. When the ON / OFF input is high, the voltage at the inverting input of the comparator is high and higher than the reference voltage at the non-inverting input. The output of the comparator is low, and the diode is reverse biased. Therefore, A1-A4 are disconnected from the constant current source module 30, which will not affect the corresponding constant current source module 30. It will not prevent the corresponding constant current source module 30 from outputting the drive voltage. The corresponding constant current source module 30 can output the drive voltage normally according to the given voltage, and the corresponding pump source outputs light normally.

[0096] When both the ON and OFF terminals sense low-level noise, the voltage at the inverting terminal of the comparator is low and lower than the reference voltage at the non-inverting terminal. The comparator outputs a high level, the diode is forward biased, and A1-A4 are set to a high level. At this time, A1-A4 will disable or prevent the corresponding constant current source module 30 from outputting the drive voltage, and thus the corresponding pump source cannot emit light normally.

[0097] like Figure 3 As shown in the constant current source module 30, if the light leakage prevention module receives a noise signal, the light leakage prevention module will output a high level to the common node 10 of the constant current source module 30. At this time, both the non-inverting and inverting inputs of the operational amplifier A2 in the constant current source module 30 are at a high level, and the operational amplifier A2 will not output a low level. The PMOS transistor M2 will not be turned on. Therefore, the constant current source module 30 will not output the drive current Iout. This achieves the purpose of preventing the constant current source module 30 from outputting the drive current, and the corresponding pump source will also be prevented from emitting light. Other constant current source modules 30 are similar, and will not be described in detail here.

[0098] It should be noted that, Figure 4 The light leakage prevention module is exemplarily connected to four constant current source modules 30. In practical applications, the light leakage prevention module can be connected to at least one constant current source module 30. This application does not limit the number of times the light leakage prevention module is connected to the constant current source module 30.

[0099] The anti-leakage module can prevent the laser from leaking light and causing a safety accident when the drive enable is turned on when there is a threshold current in the drive circuit.

[0100] The light leakage prevention module in this embodiment can be connected to at least one constant current source module 30, which can simultaneously prevent light leakage from multiple pump sources.

[0101] In one embodiment, the laser pump source driver further includes an overheat protection module connected to the control module 10;

[0102] The control module 10 is used to disconnect the power supply through the overheat protection module if the actual temperature of the monitored laser exceeds the temperature threshold.

[0103] Specifically, the overheat protection module can be connected between the constant pressure source module 20 and the constant current source module 30.

[0104] The control module 10 can monitor the actual temperature of the pump source or laser through a temperature monitoring module, such as a temperature sensor.

[0105] The control module 10 is used to disconnect the constant voltage source module 20 from the constant current source module 30 through the overheat protection module if the actual temperature of the pump source or laser is higher than the temperature threshold.

[0106] This embodiment can protect the laser from overheating by adding an overheat protection module, preventing the laser from being burned out and ensuring the safe use of the laser.

[0107] The laser pump source driver disclosed in this application integrates multiple drivers into one unit, which facilitates high-power laser control, prevents light leakage and interruption, provides overheat protection, and saves resources while achieving optimal performance. Integration also ensures better synchronization of multiple channels and improves performance indicators. Furthermore, it meets the laser's requirements for simple design, low cost, stable and reliable operation, and convenient after-sales maintenance.

[0108] In one embodiment, the laser pump source driver further includes: an auxiliary power supply module;

[0109] The auxiliary power supply module is connected to the control module 10 and is used to supply power to the control module 10.

[0110] Specifically, in this embodiment, the multiple constant current source modules 30 in the laser pump source driver share the same control module 10, which is powered by an auxiliary power supply module.

[0111] For example, the auxiliary power module can convert single-phase or three-phase AC power into 24V DC voltage to power the control module 10.

[0112] In this embodiment, by sharing the same control module 10, the control module 10 can be powered by an auxiliary power supply module, which effectively reduces circuit redundancy.

[0113] In one embodiment, the control module 10 can be connected to a host computer to receive user-defined parameters through the host computer and output a given voltage that matches the user-defined parameters to the connected constant current source module 30. The user-defined parameters include at least one of the desired laser power and desired laser duration.

[0114] And / or,

[0115] The control module 10 can be connected to a host computer to display the operating data of the laser to the user. The operating data includes at least one of the following: the driving current output by the constant current source module 30, the laser power, the voltage of the pump source, and the current of the pump source.

[0116] Specifically, in this embodiment, the control module 10 (control board) can communicate or interact with the host computer via CAN. The host computer is an industrial control computer, on which the user can set parameters and specify parameters for each constant current source module 30 or pump source. The control module 10 outputs a given voltage to the corresponding constant current source module 30 according to the specified parameters, so that the laser can emit laser light according to the specified parameters and achieve the desired effect indicated by the user-set parameters.

[0117] The collected pump source information includes the voltage and current of the pump source, the power is calculated, and the power supply status can also be collected.

[0118] Furthermore, this embodiment can also include a filtering module, which can be used to filter the acquired voltage and current of the pump source to obtain the true voltage and current. For example, it can filter out spikes in the current and voltage.

[0119] Furthermore, if the VDS voltage difference in the laser is too high, for example, reaching 10V, the control module 10 can adjust or reduce the output voltage of the constant voltage source module 20 to minimize the VDS voltage difference or reduce it to, for example, 3V, thereby making the laser more efficient and generating less heat.

[0120] In this embodiment, the control module 10 is connected to the host computer, which allows users to customize the working effect of the laser.

[0121] In this embodiment, the collected working data is sent to the host computer for display, making it convenient for users to view the status of each branch.

[0122] In one embodiment, the control module 10 is also used to simultaneously perform hardware sampling on the connected constant current source module 30 to obtain the drive current output by the constant current source module.

[0123] Specifically, in this embodiment, the sampling of multiple constant current source modules 30 can be effectively managed through a single control module 10 (control board). Then, the sampled data is filtered by software to obtain the actual operating data of the laser. This embodiment controls multiple pump sources through a single control module 10, eliminating the need to re-integrate the independent sampling data of each pump source as in existing technologies. This facilitates more intelligent power matching and allows for the shutdown of some pump sources according to power requirements, achieving multi-functionality and reduced power consumption.

[0124] This embodiment eliminates the need for sampling each pump source individually and transmitting data via software, as is done in the prior art. Instead, the control module 10 manages the sampling in a unified manner, making the laser simpler, the data more accurate, and the response faster.

[0125] In one embodiment of this application, a high-power laser is also provided, which includes a laser pump source driver according to any of the above-mentioned methods and at least one pump source.

[0126] The laser pump source driver is connected to the pump source and is used to drive the pump source;

[0127] A pump source, used to emit laser light under drive.

[0128] Specifically, Figure 5 This is a structural block diagram of a laser in one embodiment of this application; see reference. Figure 5 The laser includes a control module 10, a constant voltage source module 20, n constant current source modules 30, an auxiliary power supply module, and an optical component, which includes n pump sources. The control module 10 of the laser can be connected to an external host computer. The circuitry and operating principle of the laser pump source drivers are described above and will not be repeated here.

[0129] The faster the current rise time of the constant current source module 30 in the laser, the faster the laser output speed, the higher the operating frequency, the shorter the working time, and the better the effect.

[0130] Figure 6-1 This is a schematic diagram illustrating the synchronization of currents in various channels of a laser in existing technology. Figures 6-2 to 6-4 This is a schematic diagram illustrating the synchronization of current channels in an embodiment of this application. Wherein, Figure 6-1 , Figure 6-2 The current scale is 5A / division. Figure 6-3 The current scale is 10A / division. Figure 6-4The current scale is 1A / division, and different colored waveforms represent different channels, which can be regarded as various constant current source modules. Observing the rise time of each waveform in each figure, it can be found that when using the embodiment of this application, the rise time of different colored waveforms from the steady state is very close. However, when using the existing driving technology, at least one current rise time differs significantly from the rise time of other currents. Therefore, the laser pump source driver of this application can achieve time synchronization of the current of each constant current source module with different loads, thus optimizing the synchronization of multiple currents.

[0131] It is understandable that the faster the current rise time of the constant current source module 30 in the laser, the faster the laser output speed, the higher the operating frequency, the shorter the working time, and the better the effect.

[0132] Figures 7-1 to 7-5 This is a schematic diagram showing the rise time of each current source module under different loads in the embodiments of this application. Under different loads, the rise time of the current in each constant current source module is relatively short, and the rise edge of the waveform is relatively steep. The current can reach a stable value in a short time. That is, the laser pump source driver of this application can optimize the rise time of the current in each constant current source module 30 under different loads.

[0133] This application realizes a highly integrated laser driver that combines the functions of an AC / DC voltage source, constant current source, auxiliary power supply, pump source data sampling, and software control / host computer monitoring into one unit. This eliminates the need for multiple AC / DC voltage sources, constant current sources, and independent software control units, facilitating intelligent laser driver control and meeting the demands of high-power lasers. Integration reduces the number of components, eliminating the need for independent design and monitoring of each unit, and the need for multiple electrical components in parallel to boost laser power. It simplifies components, simplifies the control relationships of the four electrical components, thereby simplifying the internal structure of the laser, reducing its size, and further simplifying the laser system design. This reduces costs, improves reliability, and lays the foundation for future intelligent products, possessing significant practical implications. Considering the actual power requirements of industrial processing, the integrated high-power laser allows for easier realization of the required functions, simplifying production, making manufacturing more convenient, reducing malfunctions, improving product quality, and enhancing market usability.

[0134] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0135] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0136] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A laser pump source driver, characterized in that, The laser pump source driver includes: a control module, a constant voltage source module, and at least one constant current source module; The control module is connected to each of the constant current source modules and is used to output their respective given voltages to the designated and connected constant current source modules. The constant voltage source module is connected to each of the constant current source modules and is used to provide power supply voltage to each of the constant current source modules. Each constant current source module has its first end connected to the control module, its second end connected to the constant voltage source module, and its third end connected to a pump source. It is used to output a drive current that matches the given voltage under the given voltage of the control module, and to drive the connected pump source to emit laser light using the drive current.

2. The laser pump source driver according to claim 1, characterized in that, The pump source driver also includes a monitoring module, which is connected to the control module and sends various monitoring data to the host computer. The monitoring data includes at least the voltage value supplied by the constant voltage source module to each constant current source and the drive current value output by each constant current source module.

3. The laser pump source driver according to claim 1, characterized in that, The laser pump source driver further includes: a module for preventing accidental light emission located between the control module and the constant current source module; The first end of the anti-misfire light emission module is connected to the control module, and the second end is connected to the corresponding constant current source module.

4. The laser pump source driver according to claim 3, characterized in that, The inverting input of the first operational amplifier in the anti-misfire light output module is connected to the control module through a first resistor and also to the first power supply terminal through a first diode. The non-inverting input of the first operational amplifier is connected to the first power supply terminal through a second resistor and also to ground through a third resistor. The negative power supply terminal of the first operational amplifier is grounded and the positive power supply terminal is connected to the second power supply terminal. The positive power supply terminal of the first operational amplifier is also connected to the negative power supply terminal through a first capacitor. The output terminal of the first operational amplifier is grounded through a second diode, a fourth resistor, and a third resistor. The output terminal of the first operational amplifier is also connected to the third power supply terminal through a fifth resistor. The output terminal of the first operational amplifier is also connected to the gate of the first MOS transistor through a sixth resistor. The output terminal of the first operational amplifier is also grounded through a sixth resistor and a seventh resistor. The output terminal of the first operational amplifier is also grounded through a sixth resistor and a second capacitor. The source of the first MOS transistor is grounded and the drain is connected to the voltage setpoint terminal of the corresponding constant current source module.

5. The laser pump source driver according to any one of claims 1-4, characterized in that, The laser pump source driver further includes: a light leakage prevention module connected to the control module and at least one constant current source module; The first end of the light leakage prevention module is connected to the control module, and the second end is connected to the output control end of the constant current source module.

6. The laser pump source driver according to claim 5, characterized in that, The inverting input terminal of the second operational amplifier in the light leakage prevention module is connected to the control module through an eighth resistor. The inverting input terminal is also connected to the fourth power supply terminal through a third diode, and to the fifth power supply terminal through a fourth diode. The inverting input terminal is also grounded through a third capacitor. The non-inverting input terminal is connected to the fourth power supply terminal through a ninth resistor, and to the ground through a tenth resistor. The non-inverting input terminal is also connected to the output terminal of the second operational amplifier through an eleventh resistor. The negative power supply terminal of the second operational amplifier is grounded, and the positive power supply terminal is connected to the fourth power supply terminal. The negative power supply terminal is also connected to the positive power supply terminal through a fourth capacitor. The output terminal of the second operational amplifier is grounded through a fifth capacitor. The output terminal of the second operational amplifier is also connected to the corresponding constant current source module through at least one set of connection units. Each set of connection units includes a fifth diode and a twelfth resistor connected in series. The anode of the fifth diode is connected to the output terminal of the second operational amplifier, and the cathode is connected to the first end of the twelfth resistor. The second end of the twelfth resistor is connected to the output control terminal of the corresponding constant current source module.

7. The laser pump source driver according to any one of claims 1-4, characterized in that, The laser pump source driver further includes an overheat protection module connected to the control module, which disconnects the power supply when the control module detects that the actual temperature of the laser exceeds a temperature threshold.

8. The laser pump source driver according to any one of claims 1-4, characterized in that, The laser pump source driver also includes: an auxiliary power supply module; The auxiliary power module is connected to the control module and is used to supply power to the control module.

9. The laser pump source driver according to any one of claims 1-3, characterized in that, The control module is also used to simultaneously perform hardware sampling on the connected constant current source module to obtain the drive current output by the constant current source module.

10. A laser, characterized in that, The laser includes a laser pump source driver as described in any one of claims 1-9 and at least one pump source. The laser pump source driver is connected to the pump source and is used to drive the pump source; The pump source is used to emit laser light under drive.

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