Electro-optical switch driving system and laser amplifier

Abstract

The utility model discloses an electro-optical switch driving system and a laser amplifier, and the electro-optical switch driving system comprises a circuit control module which is used for receiving an external control signal and generating a high-voltage pulse instruction; the high-voltage switch is used for receiving the high-voltage pulse instruction and outputting a high-frequency high-voltage pulse signal according to the high-voltage pulse instruction, and cooling liquid is arranged in the high-voltage switch; the heat exchange cooling module is connected with the high-voltage switch and used for cooling and exchanging cooling liquid in the high-voltage switch; and the power supply module is used for supplying power to the circuit control module, the high-voltage switch and the heat exchange cooling module. According to the utility model, the heat exchange cooling module is arranged to circularly cool the cooling liquid in the high-voltage switch, so that the cooling effect on the high-voltage switch can be improved, and the output stability and reliability of high-frequency high-voltage pulse signals are further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of laser equipment, in particular to an electro-optical switch driving system and a laser amplifier. Background Art

[0002] At present, there are more and more use scenarios for high-energy ultrafast lasers and large-aperture Pockels cells, and their importance is also increasing. Among them, stable high-frequency and high-voltage output plays a decisive role in the stability of the entire system. The prior art generally uses a signal source or a seed source to provide a high-frequency pulse signal. The cost of this method of providing a high-frequency pulse signal is relatively high, and the integration is not high, and it is not convenient to use. In addition, the high-frequency pulse signal in the above method depends on external input. Therefore, when the frequency is high, it is easily interfered by the external input, and it is also easy to interfere with other parts, resulting in the high-frequency and high-voltage output being not stable enough. Furthermore, the heat generated by the high-voltage switch at different frequencies varies greatly, so the static cooling system can no longer adapt to the heat dissipation requirements at different frequencies. Therefore, how to meet the heat dissipation requirements of the high-voltage switch at different frequencies, and how to improve the output stability of the high-frequency pulse signal are problems that technicians in this field need to solve. Utility Model Content

[0003] The embodiments of the utility model provide an electro-optic switch driving system and a laser amplifier, which are intended to improve the cooling effect of a high-voltage switch, thereby improving the output stability and reliability of a high-frequency and high-voltage pulse signal.

[0004] The present invention provides an electro-optical switch driving system, comprising:

[0005] A circuit control module, used for receiving an external control signal and generating a high-voltage pulse instruction;

[0006] A high-voltage switch, used to receive the high-voltage pulse instruction and output a high-frequency high-voltage pulse signal according to the high-voltage pulse instruction, wherein a coolant is arranged in the high-voltage switch;

[0007] A heat exchange cooling module, connected to the high-voltage switch, for cooling and exchanging the coolant in the high-voltage switch;

[0008] The power supply module is used to supply power to the circuit control module, the high voltage switch and the heat exchange cooling module respectively.

[0009] Further, the circuit control module includes a control system, or the circuit control module includes a control system and an internal pulse signal generating system;

[0010] The control system is used to receive external control signals and generate high-voltage pulse instructions;

[0011] The internal pulse signal generating system is provided with a square wave generating circuit for outputting a square wave synchronization signal to the control system.

[0012] Furthermore, a flow rate and temperature detection module is provided between the high-voltage switch and the heat exchange cooling module, for detecting the flow rate and temperature of the coolant flowing from the high-voltage switch to the heat exchange cooling module.

[0013] Furthermore, the heat exchange cooling module includes a cooling base plate, a cooling pipeline and a cooling pump. One end of the cooling pipeline is connected to the cooling base plate, and the other end is connected to the high-voltage switch. The cooling pump is used to pump coolant.

[0014] Further, the cooling bottom plate comprises a lower bottom plate and an upper bottom plate, a lower water inlet and a lower water outlet are arranged on the side of the lower bottom plate, a first water cooling pipe is arranged between the lower water inlet and the lower water outlet, and the lower water inlet and the lower water outlet are respectively connected to an external water cooling system;

[0015] The upper bottom plate is provided with a first coolant inlet and a first coolant outlet which are respectively connected with the cooling pipeline, a second water cooling pipeline is provided between the first coolant inlet and the first coolant outlet, and the second water cooling pipeline is used for the coolant flow cooling.

[0016] Furthermore, the high-voltage switch is provided with a second coolant outlet for outputting coolant and a second coolant inlet for inputting coolant.

[0017] Furthermore, the cooling pipeline includes a first sub-cooling pipeline and a second sub-cooling pipeline, one end of the first sub-cooling pipeline is connected to the second coolant outlet, and the other end is connected to the first coolant inlet, and one end of the second sub-cooling pipeline is connected to the first coolant outlet, and the other end is connected to the second coolant inlet.

[0018] Furthermore, the flow rate and temperature detection module is a flow rate sensor.

[0019] Furthermore, the power supply module is a voltage adapter, and the voltage adapter is used to receive an external input voltage and convert the external input voltage into an internal use voltage.

[0020] The embodiment of the utility model further provides a laser amplifier, which adopts the electro-optical switch driving system as described in any one of the above items.

[0021] The embodiment of the utility model provides an electro-optical switch driving system and a laser amplifier, the electro-optical switch driving system comprising: a circuit control module for receiving an external control signal and generating a high-voltage pulse instruction; a high-voltage switch for receiving the high-voltage pulse instruction and outputting a high-frequency high-voltage pulse signal according to the high-voltage pulse instruction, wherein a coolant is arranged in the high-voltage switch; a heat exchange cooling module connected to the high-voltage switch for cooling and exchanging the coolant in the high-voltage switch; and a power supply module for supplying power to the circuit control module, the high-voltage switch and the heat exchange cooling module respectively. The embodiment of the utility model circulates and cools the coolant in the high-voltage switch by setting a heat exchange cooling module, thereby improving the cooling effect of the high-voltage switch, and further improving the output stability and reliability of the high-frequency high-voltage pulse signal. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 A principle block diagram of an electro-optical switch driving system provided by an embodiment of the utility model;

[0024] Figure 2 A principle block diagram of a circuit control module in an electro-optical switch drive system provided by an embodiment of the utility model;

[0025] Figure 3 A schematic diagram of the structure of a heat exchange cooling module in an electro-optical switch drive system provided by an embodiment of the utility model;

[0026] Figure 4 A schematic structural diagram of a heat exchange cooling module in an electro-optical switch drive system provided by an embodiment of the utility model from another perspective;

[0027] Figure 5 A schematic diagram of the structure of a cooling base plate in an electro-optical switch driving system provided by an embodiment of the utility model;

[0028] Figure 6 Another structural schematic diagram of a cooling base plate in an electro-optical switch driving system provided by an embodiment of the utility model. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] It should be understood that when used in this specification and the appended claims, the terms "include" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0031] It should also be understood that the terms used in this utility model specification are only for the purpose of describing specific embodiments and are not intended to limit the utility model. As used in this utility model specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0032] It should be further understood that the term “and / or” used in the present specification and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0033] See below Figure 1 , an electro-optical switch driving system provided by an embodiment of the utility model comprises:

[0034] Circuit control module 1, used for receiving external control signals and generating high-voltage pulse instructions;

[0035] A high-voltage switch 2, used for receiving the high-voltage pulse instruction and outputting a high-frequency high-voltage pulse signal according to the high-voltage pulse instruction, wherein a coolant is arranged in the high-voltage switch 2;

[0036] A heat exchange cooling module 3, connected to the high voltage switch 2, for cooling and exchanging the coolant in the high voltage switch 2;

[0037] The power supply module 4 is used to supply power to the circuit control module 1 , the high voltage switch 2 and the heat exchange cooling module 3 respectively.

[0038] In this embodiment, the electro-optical switch driving system specifically includes a circuit control module 1, a high-voltage switch 2, a heat exchange cooling module 3 and a power supply module 4, wherein the circuit control module 1 can receive an external control signal, and generate a corresponding high-voltage pulse instruction according to the external control signal, and the high-voltage switch 2 can output a corresponding high-frequency high-voltage pulse signal according to the high-voltage pulse instruction. At the same time, since the high-voltage switch 2 may work continuously for a long time, a large amount of heat will be generated in the process, so the high-voltage switch 2 is injected with coolant in advance to cool it, thereby improving its working efficiency. However, after working continuously for a long time, even if a coolant is provided, the coolant may be heated by the generated heat, resulting in a decrease in the cooling effect, so the coolant is cooled and exchanged by the heat exchange cooling module 3, thereby ensuring that the coolant in the high-voltage switch 2 can always maintain a good cooling effect, thereby ensuring that the working efficiency of the high-voltage switch 2 can be maintained at a good level.

[0039] In this embodiment, a heat exchange cooling module 3 is provided to circulate and cool the coolant in the high-voltage switch 2, thereby improving the cooling effect on the high-voltage switch 2 and further improving the output stability and reliability of the high-frequency high-voltage pulse signal.

[0040] In actual application scenarios, the current operating parameters of the electro-optical switch drive system, such as operating frequency, voltage, temperature, etc., can be collected, and then the cooling exchange efficiency of the heat exchange cooling module 3 can be dynamically adjusted according to these operating parameters, thereby ensuring that the electro-optical switch drive system can operate smoothly for a long time, thereby providing a highly reliable pulse signal output.

[0041] It should also be noted that the electro-optical switch driving system provided in this embodiment is particularly suitable for systems that require high-frequency and high-voltage pulses, such as large-aperture Pockels cells and ultrafast disk laser systems.

[0042] In one embodiment, if Figure 2 As shown, the circuit control module 1 includes a control system 11, or the circuit control module 1 includes a control system 11 and an internal pulse signal generating system 12;

[0043] The control system 11 is used to receive external control signals and generate high-voltage pulse instructions;

[0044] The internal pulse signal generating system 12 is provided with a square wave generating circuit for outputting a square wave synchronization signal to the control system 11 .

[0045] In this embodiment, the circuit control module 1 can select an external synchronization signal input, for example, a synchronization signal with parameters such as repetition frequency and pulse width can be pre-set through an external signal generator. The circuit control module 1 can also not be connected to the external synchronization signal, but use the internal pulse signal generating system 12 to directly generate a pulse synchronization signal. Of course, whether it is an external synchronization signal or an internal synchronization signal, it can be configured and selected through the control interface of the host computer. For example, the host computer software sends a control instruction to the control system 11 in the circuit control module 1, and the control instruction can specifically include the on / off of the control system 11, the selection method of the internal and external synchronization signals, and the repetition frequency, pulse width value and other information of the internal pulse signal generating system 12, so that it generates a pulse synchronization signal according to the instruction or does not generate a pulse synchronization signal. In addition, the control instruction will also include relevant instructions for controlling the pulse output, so that the control system 11 forwards the received control instruction to the high-voltage switch 2, and then the high-voltage switch 2 outputs the corresponding high-voltage high-frequency pulse information according to the instruction.

[0046] It should be noted that in this embodiment, the external synchronization signal input and the generation of the pulse synchronization signal by the internal pulse signal generating system 12 are a choice between two options, that is, it can be determined whether to configure the external synchronization signal or the internal pulse signal according to the actual usage scenario, thereby saving production costs.

[0047] In a specific embodiment, the internal pulse signal generating system 12 can use a common square wave generating circuit to generate a pulse synchronization signal, or the FPGA's PLL (phase-locked loop) IP Core (i.e., IP core, Intellectual Property core) can be used to more simply and accurately implement the square wave synchronization signal output.

[0048] This embodiment utilizes the internal pulse signal generating system 12 to generate the pulse synchronization signal, which can reduce the product cost and improve the integration of the pulse synchronization signal without the need for external connecting wires, thus better shielding external interference and improving the controllability and stability of the system.

[0049] In one embodiment, a flow rate and temperature detection module 5 is provided between the high voltage switch 2 and the heat exchange cooling module 3 for detecting the flow rate and temperature of the coolant flowing from the high voltage switch 2 to the heat exchange cooling module 3 .

[0050] In this embodiment, the flow rate and temperature detection module 5 are used to detect the flow rate and temperature of the coolant flowing from the high-voltage switch 2 to the heat exchange cooling module 3, so that the cooling efficiency can be dynamically adjusted according to the detected results. For example, when the temperature of the coolant is detected to be high, the speed of the cooling pump can be increased to increase the flow rate of the coolant, thereby appropriately improving the cooling efficiency of the heat exchange cooling module 3, and when the temperature of the coolant is detected to be low, the speed of the cooling pump can be maintained or reduced to reduce the flow rate of the coolant, thereby appropriately reducing the cooling efficiency of the heat exchange cooling module 3. In this way, not only can the cooling efficiency be guaranteed to meet the cooling demand, but also energy loss can be saved and production costs can be reduced. In addition, it is also possible to determine whether the cooling pump is working properly by combining the detection of the temperature and flow rate of the coolant. For example, when the temperature of the coolant is detected to be high, after the speed of the cooling pump is increased to increase the flow rate of the coolant, it is detected that the flow rate of the coolant is still small, then it may indicate that the cooling pump is faulty, so that the user can be reminded to take corresponding measures in time by means of alarms and the like.

[0051] In a specific embodiment, the flow rate and temperature detection module 5 is a flow sensor. When the flow sensor is classified according to the input quantity, it can specifically include various types of sensors such as displacement sensors, speed sensors, temperature sensors, and pressure sensors. Since the present embodiment needs to detect the flow rate and temperature of the coolant by a flow sensor, a temperature sensor and a speed sensor can be selected (i.e., the flow rate is determined according to the flow velocity).

[0052] In one embodiment, if Figure 3 As shown, the heat exchange cooling module 3 includes a cooling base plate 31, a cooling pipeline 32 and a cooling pump 33. One end of the cooling pipeline 32 is connected to the cooling base plate 31, and the other end is connected to the high-voltage switch 2. The cooling pump 33 is used to pump coolant.

[0053] Specific, combined Figures 4 to 6 The cooling bottom plate 31 includes a lower bottom plate 311 and an upper bottom plate 312. A lower water inlet 3111 and a lower water outlet 3112 are arranged on the side of the lower bottom plate 311. A first water cooling pipe 3113 is arranged between the lower water inlet 3111 and the lower water outlet 3112. The lower water inlet 3111 and the lower water outlet 3112 are respectively connected to an external water cooling system.

[0054] The upper bottom plate 312 is provided with a first coolant inlet 3121 and a first coolant outlet 3122 which are respectively connected to the cooling pipeline 32, and a second water cooling pipe 3123 is provided between the first coolant inlet 3121 and the first coolant outlet 3122, and the second water cooling pipe 3123 is used for the coolant flow cooling.

[0055] In addition, the high-voltage switch 2 is provided with a second coolant outlet for outputting coolant and a second coolant inlet for inputting coolant.

[0056] Furthermore, the cooling pipeline 32 includes a first sub-cooling pipeline 321 and a second sub-cooling pipeline 322, one end of the first sub-cooling pipeline 321 is connected to the second coolant outlet, and the other end is connected to the first coolant inlet 3121, and one end of the second sub-cooling pipeline 322 is connected to the first coolant outlet 3122, and the other end is connected to the second coolant inlet.

[0057] In this embodiment, the heat exchange cooling module 3 includes a cooling base plate 31, a cooling pipeline 32 and a cooling pump 33, wherein the cooling base plate 31 includes a lower base plate 311 and an upper base plate 312, and the cooling pipeline 32 includes a first sub-cooling pipeline 321 and a second sub-cooling pipeline 322. At the same time, the high-voltage switch 2 is provided with corresponding coolant inlets and outlets. When the coolant in the high-voltage switch 2 is cooled and exchanged, the cooling pump 33 is turned on, and the coolant flows into the first sub-cooling pipeline 321 through the second coolant outlet, and then flows to the upper base plate 312 through the first sub-cooling pipeline 321 and the first coolant inlet 3121. At the same time, the lower base plate 311 obtains the cooling water input from the external water cooling system through the lower water inlet 3111. At this time, the cooling water flows in the first water cooling pipeline 3113 of the lower base plate 311, and the cooling water flows in the second water cooling pipeline 3123 of the upper base plate 312, so that the cooling exchange can be achieved. Subsequently, the cooling water in the first water-cooling pipe 3113 flows out through the lower water outlet 3112, and the coolant in the second water-cooling pipe 3123 enters the second sub-cooling pipeline 322 through the first coolant outlet 3122, and finally flows back to the high-voltage switch 2 via the second sub-cooling pipeline 322 and the second coolant inlet.

[0058] It should be noted that, in the process of the coolant flowing to the upper bottom plate 312 via the first sub-cooling pipeline 321 and the first coolant inlet 3121, the flow rate and temperature detection module 5 mentioned above can be combined to detect the flow rate and temperature of the coolant, so as to dynamically adjust the working efficiency of the cooling pump 33 and the cooling efficiency of the cooling pump 33 according to the detection results. For example, when the flow rate and temperature detection module 5 detects that the flow rate and / or temperature of the coolant exceeds the set warning value, the speed of the cooling pump 33 can be automatically increased, thereby accelerating the heat exchange inside the high-voltage switch 2, so that the heat inside the high-voltage switch 2 can be dissipated faster, and the high-voltage switch 2 is prevented from being damaged by heat.

[0059] It should also be noted that the prior art usually uses a plate heat exchanger (a heat exchanger composed of a series of stacked metal sheets with a certain corrugated shape) for cooling and heat exchange. Compared with the plate heat exchanger, the bottom plate heat dissipation method adopted in this embodiment can make the overall volume of the electro-optical switch drive system smaller and can be used alone, which makes the electro-optical switch drive system more convenient when integrated.

[0060] In one embodiment, the power supply module 4 is a voltage adapter, and the voltage adapter is used to receive an external input voltage and convert the external input voltage into an internal use voltage.

[0061] This embodiment uses a voltage adapter as the power supply module 4 to provide power to the high-voltage switch 2, the heat exchange cooling module 3, etc. In the actual application scenario, the external input voltage is 220V, and after being input to the voltage adapter, the voltage adapter converts it into an internal use voltage of 250V and 24V, thereby meeting the use requirements of the high-voltage switch 2, the heat exchange cooling module 3 and the circuit control module 1.

[0062] The embodiment of the utility model further provides a laser amplifier, which adopts the electro-optical switch driving system as described above.

[0063] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the various embodiments can be referred to each other. For the system disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part description. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of this application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of this application.

[0064] It should also be noted that, in this specification, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprises", "comprising" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

Claims

1. An electro-optical switch driving system, characterized in that: include: A circuit control module, used for receiving an external control signal and generating a high-voltage pulse instruction; A high-voltage switch, used to receive the high-voltage pulse instruction and output a high-frequency high-voltage pulse signal according to the high-voltage pulse instruction, wherein a coolant is arranged in the high-voltage switch; A heat exchange cooling module, connected to the high-voltage switch, for cooling and exchanging the coolant in the high-voltage switch; The power supply module is used to supply power to the circuit control module, the high voltage switch and the heat exchange cooling module respectively.

2. The electro-optical switch driving system according to claim 1, characterized in that: The circuit control module includes a control system, or the circuit control module includes a control system and an internal pulse signal generating system; The control system is used to receive external control signals and generate high-voltage pulse instructions; The internal pulse signal generating system is provided with a square wave generating circuit for outputting a square wave synchronization signal to the control system.

3. The electro-optical switch driving system according to claim 1, characterized in that: A flow rate and temperature detection module is arranged between the high-voltage switch and the heat exchange cooling module, and is used to detect the flow rate and temperature of the coolant flowing from the high-voltage switch to the heat exchange cooling module.

4. The electro-optical switch driving system according to claim 1, characterized in that: The heat exchange cooling module includes a cooling base plate, a cooling pipeline and a cooling pump. One end of the cooling pipeline is connected to the cooling base plate, and the other end is connected to the high-voltage switch. The cooling pump is used to pump coolant.

5. The electro-optical switch driving system according to claim 4, characterized in that: The cooling bottom plate comprises a lower bottom plate and an upper bottom plate, a lower water inlet and a lower water outlet are arranged on the side of the lower bottom plate, a first water cooling pipe is arranged between the lower water inlet and the lower water outlet, and the lower water inlet and the lower water outlet are respectively connected to an external water cooling system; The upper bottom plate is provided with a first coolant inlet and a first coolant outlet which are respectively connected with the cooling pipeline, a second water cooling pipeline is provided between the first coolant inlet and the first coolant outlet, and the second water cooling pipeline is used for the coolant flow cooling.

6. The electro-optical switch driving system according to claim 5, characterized in that: The high-voltage switch is provided with a second coolant outlet for outputting coolant and a second coolant inlet for inputting coolant.

7. The electro-optical switch driving system according to claim 6, characterized in that: The cooling pipeline includes a first sub-cooling pipeline and a second sub-cooling pipeline, one end of the first sub-cooling pipeline is connected to the second coolant outlet, and the other end is connected to the first coolant inlet, and one end of the second sub-cooling pipeline is connected to the first coolant outlet, and the other end is connected to the second coolant inlet.

8. The electro-optical switch driving system according to claim 3, characterized in that: The flow rate and temperature detection module is a flow rate sensor.

9. The electro-optical switch driving system according to claim 1, characterized in that: The power supply module is a voltage adapter, which is used to receive an external input voltage and convert the external input voltage into an internal use voltage.

10. A laser amplifier, characterized in that: An electro-optical switch driving system as claimed in any one of claims 1 to 9 is used.

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