Pulse current generation circuit, pulse current generation method and semiconductor pump laser

Abstract

The invention provides a pulse current generation circuit, a pulse current generation method and a semiconductor pump laser. The pulse current generation circuit comprises a pulse signal control module and a driving source module which are connected in sequence, the driving source module is formed by connecting a plurality of driving source units in parallel; the pulse signal control module is connected with an external driving square wave output device; and the pulse current generating circuit is connected with an external laser diode array. In the mode, the multiple driving source units are arranged in parallel, the input power of the pulse current generation circuit is reduced, the size and weight of the pulse current generation circuit can be reduced, the power grid input power of the pulse current generation circuit can also be reduced, and therefore the operation safety and stability of the pulse current generation circuit are improved; and the safety of other equipment connected with the semiconductor pump laser is improved.

Description

Technical Field

[0001] The invention relates to the technical field of pulse power supply, and in particular to a pulse current generating circuit, a generating method and a semiconductor pump laser. Background Art

[0002] Semiconductor pump laser is a laser that uses semiconductor solid laser material as the working material. It has unique application prospects in high-tech fields such as space communication, optical fiber communication, atmospheric research, environmental science, medical equipment, optical image processing, laser printers, etc. Semiconductor pump laser includes a connected pulse current generation circuit and a laser diode array. The pulse current generation circuit is used to provide pulse current for the laser diode array.

[0003] The existing pulse current generating circuit has a large power per unit, generally above 10KW, which makes the pulse current generating circuit large in size and weight, causing inconvenience in various links such as production, transportation, installation, commissioning, and maintenance. At the same time, the existing pulse current generating circuit has a large grid input power, which will affect the operational safety and stability of the pulse current generating circuit itself, and further affect the safety of other equipment connected to the semiconductor pump laser. Summary of the invention

[0004] In view of this, the object of the present invention is to provide a pulse current generating circuit, a generating method and a semiconductor pump laser, which can reduce the volume and weight of the pulse current generating circuit, and can also reduce the grid input power of the pulse current generating circuit, thereby improving the operating safety and stability of the pulse current generating circuit, and further improving the safety of other equipment connected to the semiconductor pump laser.

[0005] In the first aspect, an embodiment of the present invention provides a pulse current generating circuit, comprising: a pulse signal control module and a driving source module connected in sequence; the driving source module is composed of multiple driving source units in parallel; the pulse signal control module is connected to a driving square wave output device of an external device; the pulse current generating circuit is connected to a laser diode array of an external device; the pulse signal control module is used to generate a polling signal and receive a square wave driving signal output by the driving square wave output device, and send the square wave driving signal to each driving source unit according to the polling signal, so that the driving source unit generates a square wave pulse current according to the square wave driving signal; the driving source module is used to synthesize the square wave pulse current output by each driving source unit, the synthesized square wave pulse current is a pulse current, and the pulse current is output to the laser diode array.

[0006] Furthermore, the pulse signal control module is composed of a plurality of D flip-flops connected in series; each D flip-flop corresponds to a driving source unit; and the D flip-flop is used to generate a polling signal according to a reference clock signal.

[0007] Furthermore, the driving source unit includes a charging circuit, a leading edge boosting circuit and a main output circuit; the first end of the leading edge boosting circuit is connected to the first end of the charging circuit; the first end of the main output circuit is connected to the second end of the charging circuit; the second end of the leading edge boosting circuit is connected to the second end of the main output circuit; the main output circuit is used to generate a constant square wave pulse current according to a square wave driving signal; the leading edge boosting circuit is used to perform leading edge compensation on the square wave pulse current.

[0008] Furthermore, the leading edge boosting circuit includes: an energy storage subunit and a first IGBT switch connected in sequence; the energy storage subunit is connected to a charging circuit; the gate of the first IGBT switch is connected to a main output circuit; the gate is connected to a pulse signal control module; the emitter of the first IGBT switch is connected to an anode of a laser diode array; the charging circuit is used to provide electrical energy to the energy storage subunit so that the energy storage subunit stores electrical energy; the first IGBT switch is used to close upon receiving a square wave drive signal so that the energy storage subunit is connected to the main output circuit; the energy storage subunit is also used to perform leading edge compensation on a square wave pulse current generated by the main output circuit when connected to the main output circuit.

[0009] Furthermore, a current limiting device is provided between the energy storage subunit and the first IGBT switch; the current limiting device is used to limit the current of the leading edge boosting circuit.

[0010] Furthermore, the main output circuit includes: a discharge sub-unit and a second I GBT switch connected in sequence; the discharge sub-unit is connected to a charging circuit; the gate of the second I GBT switch is connected to the gate of the first I GBT switch; the gate of the second I GBT switch is connected to a pulse signal control module; the first I GBT switch and the second I GBT switch synchronously respond to the square wave drive signal to be closed at the same time; the emitter of the second I GBT switch is connected to the anode of the laser diode array; a charging circuit, which is used to provide electrical energy to the discharge sub-unit so that the discharge sub-unit stores electrical energy; the second I GBT switch is used to close when receiving the square wave drive signal so that the discharge sub-unit generates a square wave pulse current, and sends the square wave pulse current compensated by the energy storage sub-unit to the laser diode array.

[0011] Furthermore, the leading edge boost circuit also includes a first diode and a second diode; the main output circuit also includes a third diode and a fourth diode; the emitter of the first IGBT switch, the first end of the first diode and the first end of the second diode intersect; the second end of the first diode is connected to the laser diode array; the second end of the second diode is grounded; the emitter of the second IGBT switch, the first end of the third diode and the first end of the fourth diode intersect; the second end of the third diode is connected to the laser diode array; the second end of the fourth diode is grounded.

[0012] Furthermore, the pulse current generating circuit also includes a power supply module; the power supply module is connected to the driving source module; the power supply module is used to supply power to the driving source module.

[0013] In the second aspect, an embodiment of the present invention provides a pulse current generating method, which is applied to any of the pulse current generating circuits mentioned above; the method includes: generating a polling signal through a pulse signal control module and receiving a square wave driving signal output by a driving square wave output device, sending the square wave driving signal to each driving source unit according to the polling signal, so that the driving source unit generates a square wave pulse current according to the square wave driving signal; synthesizing the square wave pulse current output by each driving source unit through the driving source module, the synthesized square wave pulse current is a pulse current, and outputting the pulse current to the laser diode array.

[0014] In a third aspect, an embodiment of the present invention provides a semiconductor pump laser, comprising a housing and a laser diode array, and also comprising any of the above-mentioned pulse current generating circuits; the pulse current generating circuit is connected to the laser diode array.

[0015] The embodiment of the present invention provides a pulse current generating circuit, generating method and semiconductor pump laser, including: a pulse signal control module and a driving source module connected in sequence; the driving source module is composed of multiple driving source units in parallel; the pulse signal control module is connected to a driving square wave output device of an external device; the pulse current generating circuit is connected to a laser diode array of an external device; the pulse signal control module is used to generate a polling signal and receive a square wave driving signal output by the driving square wave output device, and send the square wave driving signal to each driving source unit according to the polling signal, so that the driving source unit generates a square wave pulse current according to the square wave driving signal; the driving source module is used to synthesize the square wave pulse current output by each driving source unit, the synthesized square wave pulse current is a pulse current, and the pulse current is output to the laser diode array. In this way, by setting multiple driving source units in parallel, the input power of the pulse current generating circuit is reduced, the volume and weight of the pulse current generating circuit can be reduced, and the grid input power of the pulse current generating circuit can also be reduced, thereby improving the operation safety and stability of the pulse current generating circuit, and further improving the safety of other devices connected to the semiconductor pump laser.

[0016] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description, claims and drawings.

[0017] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 A schematic diagram of a pulse current generating circuit provided in Embodiment 1 of the present invention;

[0020] Figure 2 A schematic diagram of a D flip-flop provided in Embodiment 1 of the present invention;

[0021] Figure 3 A schematic diagram of a driving source unit provided in Embodiment 1 of the present invention;

[0022] Figure 4 A schematic diagram of a charging circuit provided in Embodiment 1 of the present invention;

[0023] Figure 5 A schematic diagram of a pulse current generating method provided in Embodiment 2 of the present invention;

[0024] Figure 6 This is a schematic diagram of a semiconductor pump laser provided in Embodiment 3 of the present invention.

[0025] Icons: 01-pulse signal control module; 02-drive source module; 03-drive square wave output device; 04-power module; 2-drive source unit; 21-charging circuit; 22-front edge boost circuit; 23-main output circuit; 211-AC / DC conversion device; 212-DC / DC conversion device; I GBT1-first I GBT switch; I GBT2-second I GBT switch; D1-first diode; D2-second diode; D3-third diode; D4-fourth diode; L1-first inductor; E1-first capacitor; Dn-D trigger; 31-housing; 32-pulse current generating circuit; 33-laser diode array. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] In recent years, the international and domestic semiconductor laser technology has developed rapidly, and the high-energy, high-power solid-state lasers using semiconductor lasers as pump sources have been increasingly widely used in the military and scientific research fields. As a high-power laser diode array pulse power supply, the traditional power supply structure has been used, and the power of a single machine has become larger and larger, often exceeding 10KW.

[0028] The existing pulse current generating circuits are large in size and weight. Taking a 10KW pulse current generating circuit as an example, the weight of a single unit is about 60 to 80KG, which causes inconvenience in various links such as production, transportation, installation, commissioning, and maintenance. In addition, the existing pulse current generating circuits mostly use water cooling, which has a complex structure and is difficult to maintain. The existing pulse current generating circuit has a large input power to the power grid, which will cause greater electromagnetic interference to the power grid, affect the operating safety and stability of the laser diode array pulse driving source itself, and have adverse effects on other electrical equipment. In addition, the economic benefits are low, and it cannot meet the supporting needs of key equipment such as high reliability, such as communications, aerospace, military industry and many other fields.

[0029] The present application provides a pulse current generating circuit, a generating method and a semiconductor pump laser. By arranging a plurality of driving source units in parallel, the input power of the pulse current generating circuit is reduced, the volume and weight of the pulse current generating circuit can be reduced, and the grid input power of the pulse current generating circuit can also be reduced, thereby improving the operating safety and stability of the pulse current generating circuit, and further improving the safety of other devices connected to the semiconductor pump laser.

[0030] To facilitate understanding of this embodiment, the embodiment of the present invention is described in detail below.

[0031] Embodiment 1:

[0032] Figure 1 This is a schematic diagram of a pulse current generating circuit provided in Embodiment 1 of the present invention.

[0033] Reference Figure 1 The pulse current generating circuit includes: a pulse signal control module 01 and a driving source module 02 connected in sequence; the driving source module 02 is composed of multiple driving source units 2 connected in parallel; the pulse signal control module 01 is connected to the driving square wave output device 03 of the external device; the pulse current generating circuit is connected to the laser diode array of the external device.

[0034] In one embodiment, the pulse current generating circuit further includes a power supply module 04 ; the power supply module 04 is connected to the driving source module 02 . The power supply module 04 is used to supply power to the driving source module 02 .

[0035] Here, the power module 04 may be a mains power supply.

[0036] In one embodiment, the pulse signal control module 01 is composed of a plurality of D flip-flops connected in series; each D flip-flop corresponds to a driving source unit 2 .

[0037] The D flip-flop is used to generate a polling signal according to a reference clock signal.

[0038] Here, a 5-bit shift register is formed by a D flip-flop to cyclically distribute the pulse signal to the five drive source units 2. When any of the drive source units 2 fails, the pulse signal control module 01 will automatically short-circuit its corresponding data bit, cyclically distribute the pulse signal to the remaining four drive source units 2, and continue to work with the current operating parameters.

[0039] The pulse signal control module 01 is used to generate a polling signal and receive a square wave driving signal output by the driving square wave output device 03, and send the square wave driving signal to each driving source unit 2 according to the polling signal, so that the driving source unit 2 generates a square wave pulse current according to the square wave driving signal.

[0040] Specifically, the reference clock signal determines the polling frequency of each driving source unit 2, and the reference clock signal is preset according to actual conditions.

[0041] A switch array is provided between the D flip-flop and the driving source unit 2, and the D flip-flop generates a polling frequency according to the reference clock signal, so that the switch array connects or disconnects the corresponding driving source unit 2 according to the polling signal. Figure 2 The pulse signal control module 01 includes a clock signal input terminal CLK, a reset signal input terminal RESET and a plurality of D flip-flops Dn connected in series.

[0042] The CK terminal (clock input terminal) of each D flip-flop is connected to the clock signal input terminal; in two adjacent D flip-flops, the Q terminal (data latch output terminal) of the first D flip-flop is connected to the D terminal (data input terminal) of the second D flip-flop.

[0043] The reset signal input terminal is connected to the SET terminal (set 1 terminal) of one of the multiple D flip-flops, and is connected to the RST terminals (asynchronous reset terminals) of the remaining D flip-flops in the multiple D flip-flops; the Q terminal of each D flip-flop is respectively connected to the switch array and the driving source unit 2.

[0044] Reset signal input terminal, used to output a reset signal.

[0045] The clock signal input terminal is used to receive a reference clock signal.

[0046] The pulse signal control module 01 inputs reset signals and clock signals, and outputs polling signals CLKn to the switch array. The RESET signal is connected to the SET terminal of one of the D flip-flops. When RESET is high, its Q terminal is set high; the RESET signal is connected to the RST terminals of the remaining D flip-flops. When RESET is high, its Q terminal is set low. The CK terminals of all D flip-flops are connected to CLK.

[0047] The switch array includes a plurality of switches; each switch is connected to a driving source unit 2 and a D terminal of a D flip-flop Dn. The switch is used to connect or disconnect according to the polling signal, and to turn on the corresponding switch in turn according to the polling signal, so that the driving source unit 2 outputs the corresponding square wave pulse current.

[0048] The driving source module 02 is used to synthesize the square wave pulse current output by each driving source unit 2. The synthesized square wave pulse current is a pulse current, and the pulse current is output to the laser diode array.

[0049] Specifically, the pulse signal control module 01 receives a 500HZ square wave driving signal output by the external driving square wave output device 03, and divides the received square wave driving signal through a D flip-flop so that each driving source unit 2 outputs a 100HZ square wave pulse current. The driving source module 02 synthesizes the square wave pulse current output by each driving source unit 2. The synthesized square wave pulse current is a pulse current, and the pulse current is output to the laser diode array, wherein the pulse current received by the laser diode array is 500HZ.

[0050] In one embodiment, referring to Figure 3 The driving source unit 2 includes a charging circuit 21, a leading edge boosting circuit 22 and a main output circuit 23; the first end of the leading edge boosting circuit 22 is connected to the first end of the charging circuit 21; the first end of the main output circuit 23 is connected to the second end of the charging circuit 21; the second end of the leading edge boosting circuit 22 is connected to the second end of the main output circuit 23.

[0051] Here, the charging circuit 21 is a constant current circuit. The charging circuit 21 is connected to the power module 04, referring to Figure 4 The charging circuit 21 includes an AC / DC converter 211 and a DC / DC converter 212 connected in sequence. A capacitor is connected in parallel between the AC / DC converter 211 and the DC / DC converter 212.

[0052] The main output circuit 23 is used to generate a constant square wave pulse current according to the square wave driving signal.

[0053] In one embodiment, the main output circuit 23 includes: a discharge sub-unit and a second IGBT switch IGBT2 connected in sequence; the discharge sub-unit is connected to the charging circuit 21; the gate of the second IGBT switch IGBT2 is connected to the gate of the first IGBT switch IGBT1; the gate of the second IGBT switch IGBT2 is connected to the pulse signal control module 01; the first IGBT switch IGBT1 and the second IGBT switch IGBT2 synchronously respond to the square wave drive signal to be closed at the same time; the emitter of the second IGBT switch IGBT2 is connected to the anode of the laser diode array.

[0054] Here, the discharge subunit includes at least one capacitor and an inductor connected at one end. The more capacitors and inductors there are, the smaller the inductance is. The number of capacitors and inductors is preset according to actual conditions. One capacitor corresponds to one inductor.

[0055] Reference Figure 3 The first end of the inductor is connected to the charging circuit 21 and the first end of the capacitor respectively, the second end of the inductor is connected to the first end of the adjacent inductor or the collector of the second IGBT switch IGBT2, and the second end of the capacitor is grounded.

[0056] The charging circuit 21 is used to provide electric energy to the discharge sub-unit so that the discharge sub-unit stores electric energy.

[0057] The second IGBT switch IGBT2 is used to close when receiving a square wave driving signal, so that the discharge sub-unit generates a square wave pulse current, and sends the square wave pulse current compensated by the energy storage sub-unit to the laser diode array.

[0058] In one embodiment, the main output circuit 23 further includes a third diode D3 and a fourth diode D4.

[0059] The emitter of the second IGBT switch IGBT2, the first end of the third diode D3 and the first end of the fourth diode D4 intersect; the second end of the third diode D3 is connected to the laser diode array; and the second end of the fourth diode D4 is grounded.

[0060] Here, the third diode D3 is used to provide a high voltage when the second IGBT switch IGBT2 is turned off, so as to isolate the main output circuit 23 from the laser diode array. The fourth diode D4 is used for freewheeling.

[0061] The leading edge boosting circuit 22 is used for performing leading edge compensation on the square wave pulse current.

[0062] In one embodiment, the leading edge boosting circuit 22 includes: an energy storage subunit and a first IGBT switch IGBT1 connected in sequence; the energy storage subunit is connected to the charging circuit 21; the gate of the first IGBT switch IGBT1 is connected to the main output circuit 23; the gate is connected to the pulse signal control module 01; the emitter of the first IGBT switch IGBT1 is connected to the anode of the laser diode array.

[0063] The charging circuit 21 is used to provide electric energy to the energy storage subunit so that the energy storage subunit stores electric energy.

[0064] The first IGBT switch IGBT1 is configured to close upon receiving a square wave driving signal, so as to connect the energy storage subunit to the main output circuit 23 .

[0065] The energy storage subunit is also used to perform leading edge compensation on the square wave pulse current generated by the main output circuit 23 when connected to the main output circuit 23 .

[0066] Here, the energy storage subunit is the first capacitor E1.

[0067] Specifically, the gate of the first IGBT switch IGBT1 and the gate of the second IGBT switch IGBT2 are connected to the peripheral driving square wave output device 03, and the first emitter of the first IGBT switch IGBT1 is connected to the anode of the laser diode array. The energy storage subunit is used to store electrical energy. The driving square wave output device 03 is used to output a square wave driving signal of a preset width and a preset amplitude. The first IGBT switch IGBT1 and the second IGBT switch IGBT2 are closed simultaneously in response to the square wave driving signal, and the energy storage subunit is connected to the laser diode array to perform front compensation on the pulse current output by the laser diode array through the energy storage subunit.

[0068] In one embodiment, a current limiting device is provided between the energy storage subunit and the first IGBT switch IGBT1; the current limiting device is used to limit the current of the leading edge boosting circuit 22.

[0069] Here, the current limiting device is a first inductor L1. The collector of the first IGBT switch IGBT1 is connected to the first inductor L1.

[0070] In one embodiment, the leading edge boosting circuit 22 further includes a first diode D1 and a second diode D2.

[0071] The emitter of the first IGBT switch IGBT1, the first end of the first diode D1 and the first end of the second diode D2 intersect; the second end of the first diode D1 is connected to the laser diode array; and the second end of the second diode D2 is grounded.

[0072] The first diode D1 is used to provide a high voltage when the first IGBT switch IGBT1 is turned off, so as to isolate the leading edge boosting circuit 22 from the laser diode array. The second diode D2 is used for freewheeling.

[0073] Specifically, taking the output power of the driving source unit 2 as 2KW, its technical specifications are: pulse current 250A; pulse voltage 250V; pulse width 300μs; maximum output pulse frequency 120Hz. Each driving source unit 2 can be connected in parallel through a parallel control interface.

[0074] The embodiment of the present invention provides a pulse current generating circuit, comprising: a pulse signal control module and a driving source module connected in sequence; the driving source module is composed of a plurality of driving source units connected in parallel; the pulse signal control module is connected to a driving square wave output device of an external device; the pulse current generating circuit is connected to a laser diode array of an external device; the pulse signal control module is used to generate a polling signal and receive a square wave driving signal output by the driving square wave output device, and send the square wave driving signal to each driving source unit according to the polling signal, so that the driving source unit generates a square wave pulse current according to the square wave driving signal; the driving source module is used to synthesize the square wave pulse current output by each driving source unit, the synthesized square wave pulse current is a pulse current, and the pulse current is output to the laser diode array. In this way, by setting a plurality of driving source units in parallel, the input power of the pulse current generating circuit is reduced, the volume and weight of the pulse current generating circuit can be reduced, and the grid input power of the pulse current generating circuit can also be reduced, thereby improving the operation safety and stability of the pulse current generating circuit, and further improving the safety of other devices connected to the semiconductor pump laser. At the same time, with this form of multiple drive source units connected in parallel, fault repair only requires replacing the faulty drive source unit to restore the equipment to normal working condition, which reduces maintenance and transportation costs.

[0075] Embodiment 2:

[0076] Figure 5 This is a schematic diagram of a pulse current generating method provided in Embodiment 2 of the present invention.

[0077] The pulse current generating method is applied to the pulse current generating circuit mentioned above.

[0078] Reference Figure 5 , the pulse current generating circuit comprises:

[0079] Step S101, generating a polling signal through a pulse signal control module and receiving a square wave driving signal output by a driving square wave output device, and sending the square wave driving signal to each driving source unit according to the polling signal, so that the driving source unit generates a square wave pulse current according to the square wave driving signal.

[0080] Step S102 , synthesizing the square wave pulse current output by each driving source unit through the driving source module, the synthesized square wave pulse current is a pulse current, and the pulse current is output to the laser diode array.

[0081] An embodiment of the present invention provides a pulse current generating method, in which a plurality of driving source units are arranged in parallel to reduce the input power of a pulse current generating circuit, thereby reducing the volume and weight of the pulse current generating circuit, and also reducing the grid input power of the pulse current generating circuit, thereby improving the operating safety and stability of the pulse current generating circuit, and further improving the safety of other devices connected to the semiconductor pump laser.

[0082] Embodiment three:

[0083] Figure 6 This is a schematic diagram of a semiconductor pump laser provided in Embodiment 3 of the present invention.

[0084] Reference Figure 6 The semiconductor pump laser includes a housing 31 and a laser diode array 33 , and also includes the above-mentioned pulse current generating circuit 32 ; the pulse current generating circuit 32 is connected to the laser diode array 33 .

[0085] An embodiment of the present invention provides a semiconductor pump laser. In this method, by arranging multiple driving source units in parallel, the input power of a pulse current generating circuit is reduced, the volume and weight of the pulse current generating circuit can be reduced, and the grid input power of the pulse current generating circuit can also be reduced, thereby improving the operating safety and stability of the pulse current generating circuit, and further improving the safety of other devices connected to the semiconductor pump laser.

[0086] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the system and device described above can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here.

[0087] In addition, in the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0088] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc., which can store program codes.

[0089] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0090] Finally, it should be noted that the above-described embodiments are only specific implementations of the present invention, which are used to illustrate the technical solutions of the present invention, rather than to limit them. The protection scope of the present invention is not limited thereto. Although the present invention is described in detail with reference to the above-described embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above-described embodiments within the technical scope disclosed by the present invention, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A pulse current generating circuit, characterized in that: include: A pulse signal control module and a drive source module connected in sequence; The driving source module is composed of a plurality of driving source units connected in parallel; the pulse signal control module is connected to a driving square wave output device of an external device; the pulse current generating circuit is connected to a laser diode array of an external device; The pulse signal control module is used to generate a polling signal and receive a square wave driving signal output by the driving square wave output device, and send the square wave driving signal to each of the driving source units according to the polling signal, so that the driving source unit generates a square wave pulse current according to the square wave driving signal; The driving source module is used to synthesize the square wave pulse current output by each driving source unit, the synthesized square wave pulse current is a pulse current, and the pulse current is output to the laser diode array.

2. The pulse current generating circuit according to claim 1, characterized in that: The pulse signal control module is composed of a plurality of D flip-flops connected in series; each of the D flip-flops corresponds to one driving source unit; The D flip-flop is used to generate the polling signal according to a reference clock signal.

3. The pulse current generating circuit according to claim 1, characterized in that: The driving source unit includes a charging circuit, a front edge boosting circuit and a main output circuit; the first end of the front edge boosting circuit is connected to the first end of the charging circuit; the first end of the main output circuit is connected to the second end of the charging circuit; the second end of the front edge boosting circuit is connected to the second end of the main output circuit; The main output circuit is used to generate the constant square wave pulse current according to the square wave driving signal; The leading edge boosting circuit is used to perform leading edge compensation on the square wave pulse current.

4. The pulse current generating circuit according to claim 3, characterized in that: The frontier boost circuit comprises: an energy storage subunit and a first IGBT switch connected in sequence; the energy storage subunit is connected to the charging circuit; the gate of the first IGBT switch is connected to the main output circuit; the gate is connected to the pulse signal control module; the emitter of the first IGBT switch is connected to the anode of the laser diode array; The charging circuit is used to provide electric energy to the energy storage subunit so that the energy storage subunit stores electric energy; The first IGBT switch is used to close when receiving the square wave drive signal, so that the energy storage subunit is connected to the main output circuit; The energy storage subunit is also used to perform leading edge compensation on the square wave pulse current generated by the main output circuit when connected to the main output circuit.

5. The pulse current generating circuit according to claim 4, characterized in that: A current limiting device is provided between the energy storage subunit and the first IGBT switch; The current limiting device is used to limit the current of the leading edge boosting circuit.

6. The pulse current generating circuit according to claim 4, characterized in that: The main output circuit comprises: a discharge subunit and a second IGBT switch connected in sequence; the discharge subunit is connected to the charging circuit; the gate of the second IGBT switch is connected to the gate of the first IGBT switch; the gate of the second IGBT switch is connected to the pulse signal control module; the first IGBT switch and the second IGBT switch synchronously respond to the square wave drive signal to close at the same time; the emitter of the second IGBT switch is connected to the anode of the laser diode array; The charging circuit is used to provide electrical energy to the discharge sub-unit so that the discharge sub-unit stores electrical energy; The second IGBT switch is used to close when receiving the square wave driving signal, so that the discharge subunit generates the square wave pulse current, and sends the square wave pulse current compensated by the energy storage subunit to the laser diode array.

7. The pulse current generating circuit according to claim 6, characterized in that: The leading edge boost circuit further includes a first diode and a second diode; the main output circuit further includes a third diode and a fourth diode; The emitter of the first IGBT switch, the first end of the first diode and the first end of the second diode intersect; the second end of the first diode is connected to the laser diode array; the second end of the second diode is grounded; The emitter of the second IGBT switch, the first end of the third diode and the first end of the fourth diode intersect; the second end of the third diode is connected to the laser diode array; and the second end of the fourth diode is grounded.

8. The pulse current generating circuit according to claim 1, characterized in that: The pulse current generating circuit further comprises a power supply module; the power supply module is connected to the driving source module; The power supply module is used to supply power to the driving source module.

9. A pulse current generating method, characterized in that: Applicable to the pulse current generating circuit according to any one of claims 1 to 8 above; the method comprises: Generate a polling signal through the pulse signal control module and receive the square wave driving signal output by the driving square wave output device, and send the square wave driving signal to each of the driving source units according to the polling signal, so that the driving source unit generates a square wave pulse current according to the square wave driving signal; The square wave pulse current output by each of the driving source units is synthesized by the driving source module, the synthesized square wave pulse current is a pulse current, and the pulse current is output to the laser diode array.

10. A semiconductor pump laser, characterized in that: It comprises a housing and a laser diode array, and also comprises a pulse current generating circuit as described in any one of claims 1 to 8; the pulse current generating circuit is connected to the laser diode array.

Images