A high-frequency controllable seed light pumped amplification driver and driving circuit

Abstract

The application discloses a high-frequency controllable seed light pumped amplification driver and a driving circuit, which comprises an interactive touch display module, which is used for interactive operation with the driver; a numerical control constant current module, which is used for generating a driving current; a pulse modulation module, which is used for realizing high-frequency controllable pulse modulation with high resolution; a numerical control compatible module, which is used for realizing compatibility with different models of amplifiers; a power module, which is used for supplying power to the whole driving system; a temperature control module, which is used for adjusting the working temperature of the amplifier; an external driving interface, which is used for connecting the amplifier to be driven; and a master control chip, which is used for controlling the numerical control constant current module, the pulse modulation module, the numerical control compatible module and the temperature control module respectively. The high-frequency controllable seed light pumped amplification driver and the driving circuit can solve the problem of unstable driving current during high-frequency modulation, and realize stable amplification by numerically controlling different types of seed light pumped amplifiers.

Description

Technical Field

[0001] This invention relates to the field of seed optical pump amplification driving technology, and in particular to a high-frequency controllable seed optical pump amplification driver and driving circuit. Background Technology

[0002] In experimental research, seed light pump amplifiers are widely used in the field of optics, which places increasingly higher demands on the amplifier's driving system. Performance parameters such as modulation frequency, driving current, and driving stability greatly limit the operability of experiments. Existing product designs have various problems during use. Existing driving schemes are almost incompatible with the design requirements of high-frequency modulation and high-current stable driving. Some schemes adopt external modulation, but this affects the magnitude of the constant current, which is not suitable for experimental scenarios with high precision requirements. Therefore, designing a driving system that can achieve high precision, high-frequency modulation, numerically controlled stable amplification, and compatibility with various seed light pump amplifiers has become a major challenge. Summary of the Invention

[0003] The purpose of this invention is to provide a high-frequency controllable seed light pump amplifier driver and driving circuit, which can solve the problem of unstable driving current during high-frequency modulation, and achieve stable amplification by being compatible with different types of seed light pump amplifiers through numerical control.

[0004] To achieve the above objectives, the present invention provides a high-frequency controllable seed light pump amplifier driver and driving circuit, including an interactive touch display module for displaying and setting the driving current magnitude, pulse modulation frequency, estimated internal resistance of the amplifier to be compatible, and constant operating temperature of the amplifier.

[0005] The numerical control constant current module is used to generate drive current;

[0006] The pulse modulation module is used to achieve high-frequency controllable, high-resolution pulse modulation without changing the magnitude of the drive current.

[0007] The CNC compatibility module is used to achieve compatibility with different amplifier models and ensure stable current drive.

[0008] The power module is used to supply power to the entire drive system;

[0009] The temperature control module is used to regulate the operating temperature of the amplifier;

[0010] An external driver interface is used to connect to the amplifier to be driven;

[0011] The main control chip is used to control the numerical control constant current module, pulse modulation module, numerical control compatible module and temperature control module respectively according to the settings of the interactive touch display module.

[0012] Preferably, the main control chip is connected to the interactive touch display module, the CNC constant current module, the CNC compatible module, the pulse modulation module, the power supply module, and the temperature control module, respectively, and the external drive interface is connected to the pulse modulation module.

[0013] Preferably, the digital-controlled constant current module includes a digital-to-analog converter circuit and a voltage-controlled constant current circuit. The main control chip controls the digital-to-analog converter circuit to generate the required voltage value and controls the voltage-controlled constant current circuit to generate a stable constant drive current.

[0014] Preferably, the pulse modulation module is divided into an external modulation section and an internal modulation section. The internal modulation section includes a signal generator and a high-frequency constant current switching circuit, and the external modulation section provides an external signal input interface. The external modulation section and the internal modulation section are switched using jumpers.

[0015] Preferably, the CNC-compatible module includes a digital potentiometer and a measurement feedback circuit.

[0016] A high-frequency controllable seed light pump amplification driving circuit includes a digital-to-analog output unit, a voltage-controlled constant current unit, a high-frequency constant current modulation unit, and a measurement feedback unit connected in sequence.

[0017] Preferably, the digital-to-analog output unit includes an operational amplifier U1, a voltage divider resistor R1, a precision resistor R2, and a precision resistor R3;

[0018] The non-inverting input terminal of the operational amplifier U1 is connected to the voltage output terminal of the DAC through a voltage divider resistor R1. The inverting input terminal of the operational amplifier U1 is grounded through a precision resistor R2. The inverting input terminal and the output terminal of the operational amplifier U1 are connected through a precision resistor R3. The output terminal of the operational amplifier U1 is connected to the voltage-controlled constant current unit.

[0019] Preferably, the voltage-controlled constant current unit includes operational amplifier U2, operational amplifier U3, precision resistor R4, precision resistor R5, precision resistor R6 and precision resistor R7;

[0020] The non-inverting input of operational amplifier U2 is connected to the voltage output of the digital-to-analog output unit via a precision resistor R4, and the inverting input of operational amplifier U2 is grounded via a precision resistor R5. The output of operational amplifier U2 is connected to the precision resistor R6, the rear end of which is connected to the high-frequency constant current modulation unit, and the rear end of the precision resistor R6 is also connected to the non-inverting input of operational amplifier U3. The inverting input and output of operational amplifier U3 are connected and then connected to the non-inverting input of operational amplifier U2 via a precision resistor R7.

[0021] Preferably, the high-frequency constant current modulation unit includes MOS transistor M1, MOS transistor M2, diode D1, signal generator and external signal input interface;

[0022] The current output terminal of the voltage-controlled constant current unit is connected to the drain of the MOS transistor M1, the gate of the MOS transistor M1 is connected to the drain of the MOS transistor M2, the gate of the MOS transistor M2 is connected to the modulation signal source, and the modulation signal source is selected by a jumper cap to the signal generator and the external signal input interface respectively. The sources of both MOS transistors M1 and M2 are grounded. The current output terminal of the voltage-controlled constant current unit is connected to the measurement feedback unit through diode D1.

[0023] Preferably, the measurement feedback unit includes a digital potentiometer and a potential comparator, both of which are connected to the output terminal of the diode D1.

[0024] Therefore, the beneficial effects of the above-mentioned high-frequency controllable seed optical pump amplifier driver and driving circuit of the present invention are as follows:

[0025] (1) The present invention effectively solves the problem of unstable driving current during high frequency modulation.

[0026] (2) This invention achieves high-frequency modulation of the output current while realizing stable output of large current.

[0027] (3) The present invention uses numerical control to achieve large range and high precision control of current and modulation frequency.

[0028] (4) The present invention is compatible with different types of seed light pump amplifiers, ensuring driving effect.

[0029] (5) Compared with commonly used integrated chip solutions and high-frequency MOS solutions, the present invention has better performance, lower cost, and can meet higher requirements.

[0030] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of a high-frequency controllable seed light pump amplifier driver according to the present invention;

[0032] Figure 2 This is a schematic diagram of a high-frequency controllable seed light pump amplification drive circuit according to the present invention.

[0033] Figure 3 This is a flowchart of the operation of a high-frequency controllable seed light pump amplifier driver according to the present invention. Detailed Implementation

[0034] The technical solution of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0035] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0036] Example 1

[0037] like Figure 1 As shown, the present invention provides a high-frequency controllable seed light pump amplifier driver, including an interactive touch display module, a digitally controlled constant current module, a pulse modulation module, a digitally controlled compatible module, a power supply module, a temperature control module, an external drive interface, and a main control chip.

[0038] The power supply module, connected to the main control chip, provides power to the entire drive system. The interactive touch display module, also connected to the main control chip, displays and sets the drive current, pulse modulation frequency, estimated internal resistance of the amplifier to be compatible, and the amplifier's constant operating temperature, controlling the drive system's operating status. The interactive touch display module can use an LCD touchscreen or other input display device, and the main control chip can be, but is not limited to, STM32, FPGA, or other chips.

[0039] In this implementation, the CNC constant current module is connected to and controlled by the main control chip. It includes a digital-to-analog converter (DAC) circuit and a voltage-controlled constant current (DCC) circuit to generate a controllable, stable, wide-range, and high-resolution drive current. The main control chip controls the DAC circuit to generate the required voltage value and the DCC circuit to generate a stable, constant drive current. Based on the drive current set by the interactive touch display module, the main control chip controls the DAC circuit to perform digital-to-analog conversion and voltage conversion to generate the required voltage value. The DCC circuit then generates a corresponding stable, constant drive current based on the voltage value generated by the DAC circuit.

[0040] It should be noted that the main control chip should control the DAC output digital-to-analog conversion circuit to generate a specific analog voltage value according to the requirements. After passing through the operational amplifier circuit, the voltage value required by the voltage-controlled constant current circuit is generated, so as to realize the one-to-one correspondence between the control voltage and the drive current, thereby achieving precise control of the drive current.

[0041] The pulse modulation module is divided into an external modulation section and an internal modulation section. The internal modulation section includes a signal generator and a high-frequency constant current switching circuit, while the external modulation section provides an external signal input interface to achieve high-frequency controllable and high-resolution pulse modulation without changing the magnitude of the drive current.

[0042] The external modulation section and the internal modulation section are switched using jumper caps. The signal generator generates a square wave signal of a specific frequency according to the pulse modulation frequency set by the interactive touch display module. The high-frequency constant current switching circuit realizes the switching on and off of the constant current source according to the square wave signal generated by the signal generator.

[0043] It should be noted that the difference between the external modulation section and the internal modulation section is only the signal source being modulated; the modulation principle is the same. The high-frequency constant current switching circuit can ensure that the drive current remains stable under high-frequency modulation, thus achieving stable amplification of the seed source. The internal nodes of the high-frequency constant current switching circuit are brought out through an interface for connection to an external amplifier for driving.

[0044] The CNC compatibility module is connected to and controlled by the main control chip. It includes a digital potentiometer and a measurement feedback circuit to ensure compatibility with different amplifier models and stable current drive. The digital potentiometer sets its resistance value based on the coarsely estimated internal resistance of the amplifier to be compatible, as set by the interactive touch display module. The measurement feedback circuit determines the potential magnitude and feeds the result back to the main control chip for fine-tuning of the digital potentiometer.

[0045] It should be noted that the resistance value of the digital potentiometer is configured by the main control chip via SPI or other means. The measurement feedback circuit judges the potential of the high voltage terminal of the digital potentiometer from the preset voltage value and feeds the result back to the main control chip. The main control chip makes fine adjustments based on the feedback result to match amplifiers with different internal resistances and achieve stable operation of different amplifiers. The configuration of the digital potentiometer only occurs during the initialization phase of changing the amplifier. The main control chip records the setting state and uses the previous setting value by default each time it is used.

[0046] The temperature control module is connected to and controlled by the main control chip, and is used to regulate the amplifier's operating temperature. The main control chip sets the temperature control module based on the constant operating temperature of the amplifier set by the interactive touch display module, thus controlling the amplifier's temperature. It is worth noting that the temperature control module can also be composed of an external module, controlled by the main control chip via communication interfaces such as SPI.

[0047] The external driver interface connects to the pulse modulation module and is used to connect the amplifier to be driven. It is led out from the node in the aforementioned high-frequency constant current switching circuit and can be connected to the driver base of an external amplifier, such as the amplifier's butterfly-shaped package test fixture, to provide the modulated drive current to the external amplifier.

[0048] like Figure 2 As shown, this embodiment also provides a high-frequency controllable seed light pump amplification driving circuit, including a digital-to-analog output unit, a voltage-controlled constant current unit, a high-frequency constant current modulation unit, and a measurement feedback unit connected in sequence.

[0049] The analog-to-digital output unit includes an operational amplifier U1, a voltage divider resistor R1, a precision resistor R2, and a precision resistor R3. The non-inverting input of operational amplifier U1 is connected to the voltage output of the DAC via the voltage divider resistor R1. The inverting input of operational amplifier U1 is grounded via the precision resistor R2. The inverting input and output of operational amplifier U1 are connected via the precision resistor R3. The output of operational amplifier U1 is connected to the voltage-controlled constant current unit. Operational amplifier U1, in conjunction with the two precision resistors, amplifies the voltage output from the DAC to obtain the desired voltage. The precision resistors are responsible for setting specific amplification factors.

[0050] The voltage-controlled constant current unit includes operational amplifier U2, operational amplifier U3, precision resistors R4, R5, R6, and R7. It can generate a specific constant current based on the voltage value output by the digital-to-analog output unit for use by the back-end circuit.

[0051] The supply voltages of operational amplifiers U2 and U3 determine the maximum range of the output constant current. The non-inverting input of operational amplifier U2 is connected to the voltage output of the analog-to-digital output unit via precision resistor R4, and the inverting input of operational amplifier U2 is grounded via precision resistor R5. The output of operational amplifier U2 is connected to precision resistor R6, the rear end of which is connected to the high-frequency constant current modulation unit. The rear end of precision resistor R6 is also connected to the non-inverting input of operational amplifier U3. The inverting input and output of operational amplifier U3 are connected, and then connected to the non-inverting input of operational amplifier U2 via precision resistor R7. This connection enables a large-range, high-precision, and high-resolution constant current output.

[0052] The high-frequency constant current modulation unit includes MOSFETs M1 and M2, diode D1, a signal generator, and an external signal input interface. The current output terminal of the voltage-controlled constant current unit is connected to the drain of MOSFET M1, the gate of MOSFET M1 is connected to the drain of MOSFET M2, and the gate of MOSFET M2 is connected to the modulation signal source. The modulation signal source is selected by a jumper cap to switch between the signal generator and the external signal input interface. The sources of MOSFETs M1 and M2 are both grounded. The current output terminal of the voltage-controlled constant current unit is connected to the measurement feedback unit through diode D1.

[0053] Diode D1 is responsible for filtering out reverse current; a high-frequency diode can be selected. The connection method of the MOSFET solves the problem of the drive current being affected by the discharge of the internal capacitor in the MOSFET, achieving the accuracy of the drive current without affecting it under high-frequency conditions.

[0054] The measurement feedback unit includes a digital potentiometer and a potential comparator, both connected to the output of diode D1. When a new device is connected, the digital potentiometer sets the resistance value based on a rough estimate, and the potential comparator compares the set voltage value with the measured voltage value, feeding back the measurement result to the main control chip. The measurement feedback unit effectively improves the stability of the output current, thus ensuring the drive system's compatibility with other amplifiers.

[0055] It is worth noting that the potentiometer compares the high-voltage terminal of the digital potentiometer with a preset voltage. The preset voltage is obtained through specific testing and is provided by a voltage divider in the power supply circuit.

[0056] like Figure 3 As shown, in this embodiment, when a new device is connected, the seed light pump amplifier driver enters an initialization configuration state. It inputs a rough estimate of the internal resistance of the seed light amplifier to be driven, waits for the internal numerical control compatibility module to automatically achieve compatibility, and records the digital potentiometer status for direct recall later. When the device is in operation, turning it on automatically configures the digital potentiometer status. The touch interface displays the settings for the drive current and modulation frequency. After setting, clicking "Output" outputs the current, and clicking "Close" closes the output.

[0057] Therefore, the present invention employs the above-mentioned high-frequency controllable seed light pump amplifier driver and driving circuit, which can solve the problem of unstable driving current during high-frequency modulation, and at the same time achieve stable amplification by being compatible with different types of seed light pump amplifiers through numerical control.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solutions of the present invention, and these modifications or equivalent substitutions cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A high-frequency controllable seed light pump amplification driver, characterized in that: It includes an interactive touch display module for displaying and setting the drive current magnitude, pulse modulation frequency, rough estimate of the internal resistance of the amplifier to be compatible, and the constant operating temperature of the amplifier; The numerical control constant current module is used to generate drive current; The pulse modulation module is used to achieve high-frequency controllable, high-resolution pulse modulation without changing the magnitude of the drive current. The CNC compatibility module is used to achieve compatibility with different amplifier models and ensure stable current drive. The power module is used to supply power to the entire drive system; The temperature control module is used to regulate the operating temperature of the amplifier; An external driver interface is used to connect to the amplifier to be driven; The main control chip is used to control the numerical control constant current module, pulse modulation module, numerical control compatible module and temperature control module respectively according to the settings of the interactive touch display module; The CNC compatibility module is connected to and controlled by the main control chip. It includes a digital potentiometer and a measurement feedback circuit to achieve compatibility with different types of amplifiers and ensure stable current drive. The digital potentiometer sets its own resistance value according to the coarsely estimated internal resistance of the amplifier to be compatible set by the interactive touch display module. The measurement feedback circuit judges the potential magnitude and feeds the result back to the main control chip to realize the fine adjustment of the digital potentiometer.

2. The high-frequency controllable seed light pump amplifier driver and driving circuit according to claim 1, characterized in that: The main control chip is connected to the interactive touch display module, the CNC constant current module, the CNC compatible module, the pulse modulation module, the power supply module, and the temperature control module, respectively, and the external drive interface is connected to the pulse modulation module.

3. The high-frequency controllable seed light pump amplifier driver and driving circuit according to claim 1, characterized in that: The numerically controlled constant current module includes a digital-to-analog converter circuit and a voltage-controlled constant current circuit. The main control chip controls the digital-to-analog converter circuit to generate the required voltage value and controls the voltage-controlled constant current circuit to generate a stable constant drive current.

4. The high-frequency controllable seed light pump amplifier driver and driving circuit according to claim 1, characterized in that: The pulse modulation module is divided into an external modulation section and an internal modulation section. The internal modulation section includes a signal generator and a high-frequency constant current switching circuit, while the external modulation section provides an external signal input interface. The external modulation section and the internal modulation section are switched using jumpers.

5. The high-frequency controllable seed light pump amplifier driver and driving circuit according to claim 1, characterized in that: The CNC-compatible module includes a digital potentiometer and a measurement feedback circuit.

6. A high-frequency controllable seed light pump amplification driving circuit, characterized in that: It includes a digital-to-analog output unit, a voltage-controlled constant current unit, a high-frequency constant current modulation unit, and a measurement feedback unit connected in sequence; The high-frequency constant current modulation unit includes MOSFET M1, MOSFET M2, diode D1, signal generator and external signal input interface; The current output terminal of the voltage-controlled constant current unit is connected to the drain of the MOSFET M1, the gate of the MOSFET M1 is connected to the drain of the MOSFET M2, the gate of the MOSFET M2 is connected to the modulation signal source, and the modulation signal source is selected by a jumper cap to the signal generator and the external signal input interface respectively. The sources of both MOSFETs M1 and M2 are grounded. The current output terminal of the voltage-controlled constant current unit is connected to the measurement feedback unit through diode D1. The measurement feedback unit includes a digital potentiometer and a potential comparator, both of which are connected to the output terminal of the diode D1. The digital potentiometer sets its own resistance value based on the coarsely estimated internal resistance of the amplifier to be compatible set by the interactive touch display module. The measurement feedback unit judges the potential magnitude and feeds the result back to the main control chip to realize the fine adjustment of the digital potentiometer.

7. The high-frequency controllable seed light pump amplification driving circuit according to claim 6, characterized in that: The digital-to-analog output unit includes an operational amplifier U1, a voltage divider resistor R1, a precision resistor R2, and a precision resistor R3; The non-inverting input terminal of the operational amplifier U1 is connected to the voltage output terminal of the DAC through a voltage divider resistor R1. The inverting input terminal of the operational amplifier U1 is grounded through a precision resistor R2. The inverting input terminal and the output terminal of the operational amplifier U1 are connected through a precision resistor R3. The output terminal of the operational amplifier U1 is connected to the voltage-controlled constant current unit.

8. The high-frequency controllable seed light pump amplification driving circuit according to claim 6, characterized in that: The voltage-controlled constant current unit includes operational amplifier U2, operational amplifier U3, precision resistor R4, precision resistor R5, precision resistor R6 and precision resistor R7; The non-inverting input of operational amplifier U2 is connected to the voltage output of the digital-to-analog output unit via a precision resistor R4, and the inverting input of operational amplifier U2 is grounded via a precision resistor R5. The output of operational amplifier U2 is connected to the precision resistor R6, the rear end of which is connected to the high-frequency constant current modulation unit, and the rear end of the precision resistor R6 is also connected to the non-inverting input of operational amplifier U3. The inverting input and output of operational amplifier U3 are connected and then connected to the non-inverting input of operational amplifier U2 via a precision resistor R7.

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