CN116799612B - Pulse laser, driving circuit thereof and control method of driving circuit - Google Patents
Pulse laser, driving circuit thereof and control method of driving circuit Download PDFInfo
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Abstract
The invention discloses a pulse laser, a driving circuit thereof and a control method of the driving circuit, wherein the driving circuit of the pulse laser is used for driving the pulse laser, the pulse laser at least comprises a laser pumping source, and the driving circuit of the pulse laser comprises: a controller and a plurality of modulation circuits; the controller is electrically connected with the control end of each modulation circuit respectively; the output end of each modulation circuit is electrically connected with the laser pumping source; the controller is used for acquiring laser waveforms expected to be emitted by the pulse laser and providing corresponding driving signals for each modulation circuit in a one-to-one correspondence mode according to the laser waveforms expected to be emitted; the modulation circuit is used for providing a corresponding modulation signal for the laser pumping source under the control of the received driving signal so as to control the laser waveform emitted by the pulse laser. According to the technical scheme, the pulse laser can be controlled to output lasers with different pulse waveforms, and particularly, the pulse laser has a good pulse waveform generation effect for ns-level narrow pulses.
Description
Technical Field
The present invention relates to the field of laser technologies, and in particular, to a pulse laser, a driving circuit thereof, and a control method of the driving circuit.
Background
The pulse fiber laser is widely applied to various fields because of the characteristics of high beam quality, convenient thermal management, strong environmental adaptability and the like. In order to further improve the processing range of the pulse laser and meet the requirements of more processing technologies, the requirements on the pulse waveform of the pulse laser are higher and higher, for example, the waveform of the pulse laser is required to be square wave, triangular wave, gaussian wave and the like in some scenes.
The pulse waveform of the current pulse fiber laser is generally obtained by driving a seed pump through a single pulse circuit tube, and the pulse width and the pulse shape of the pulse are determined by hardware parameters, so that the pulse fiber laser is difficult to realize or has poor effect for specific waveform requirements.
Disclosure of Invention
The invention provides a pulse laser, a driving circuit thereof and a control method of the driving circuit, which aim to overcome the defects in the prior art and realize the control of the pulse laser to output laser with different pulse waveforms, thereby meeting wider processing technology requirements.
In a first aspect, the present invention provides a driving circuit for a pulse laser, the pulse laser including at least a laser pumping source, the driving circuit for a pulse laser comprising: a controller and a plurality of modulation circuits;
The controller is electrically connected with the control end of each modulation circuit respectively; the output end of each modulation circuit is electrically connected with the laser pumping source;
the controller is used for acquiring laser waveforms expected to be emitted by the pulse laser and providing corresponding driving signals for the modulation circuits in a one-to-one correspondence mode according to the laser waveforms expected to be emitted;
the modulation circuit is used for providing a corresponding modulation signal for the laser pumping source under the control of the received driving signal so as to control the laser waveform emitted by the pulse laser.
Optionally, the input end of each modulation circuit receives a bias signal;
The controller is specifically used for: acquiring laser waveforms expected to be emitted by the pulse laser, decomposing the laser waveforms into a plurality of sub-waveforms, and controlling the number of effective levels of driving signals and the number of ineffective levels of the driving signals provided in a time period to which the sub-waveforms belong according to the maximum amplitude and the minimum amplitude of each sub-waveform;
the modulation circuit is specifically configured to provide a bias current signal to the laser pumping source as the modulation signal according to the bias signal when an active level of the drive signal is received, and to stop providing the bias current signal to the laser pumping source when an inactive level of the drive signal is received.
Optionally, the modulation circuit comprises at least a first resistor and a transistor;
The control electrode of the transistor is electrically connected with the controller through the first resistor; a first pole of the transistor is electrically connected to the bias power supply; the second pole of the transistor is electrically connected with the laser pumping source.
Optionally, the driving circuit of the pulse laser further includes: a bias circuit;
The bias circuit is electrically connected with the input end of each modulation circuit; the bias circuit is used for providing bias signals to each of the modulation circuits.
Optionally, the driving circuit of the pulse laser further includes a plurality of delay circuits corresponding to the modulation circuits one by one;
The controller is respectively and electrically connected with each delay circuit;
the controller is further configured to provide a delay signal to the delay circuit;
the delay circuit is used for feeding back the delay time of the driving signal provided by the controller to the corresponding modulation circuit according to the delay signal.
Optionally, the delay circuit includes a second resistor;
one end of the second resistor is electrically connected with the delay signal output end of the controller respectively, and the other end of the second resistor is electrically connected with the delay signal input end of the controller.
Optionally, the driving circuit of the pulse laser further includes: a power supply circuit;
The power supply circuit is electrically connected with the laser pumping source; the power supply circuit is used for providing a power supply for the laser pumping source.
In a second aspect, the present invention provides a control method for a driving circuit of a pulse laser, including:
The controller acquires laser waveforms expected to be emitted by the pulse laser, and provides corresponding driving signals for the modulation circuits in a one-to-one correspondence mode according to the laser waveforms expected to be emitted;
The modulation circuit provides a corresponding modulation signal for the laser pumping source under the control of the received driving signal so as to control the laser waveform emitted by the pulse laser.
Optionally, the controller acquires a laser waveform expected to be emitted by the pulse laser, and provides corresponding driving signals to the modulation circuits in a one-to-one correspondence manner according to the expected laser waveform, which specifically includes:
The controller acquires laser waveforms expected to be emitted by the pulse laser, decomposes the laser waveforms into a plurality of sub-waveforms, and controls the number of effective levels of driving signals and the number of ineffective levels of the driving signals provided in a time period to which the sub-waveforms belong according to the maximum amplitude and the minimum amplitude of each sub-waveform;
The modulation circuit provides a corresponding modulation signal for the laser pumping source under the control of the received driving signal so as to control the laser waveform emitted by the pulse laser, and the method specifically comprises the following steps:
providing a bias current signal to the laser pump source as the modulation signal in response to the bias signal when an active level of the drive signal is received, and ceasing to provide a bias current signal to the laser pump source when an inactive level of the drive signal is received.
In a third aspect, the present invention provides a pulsed laser comprising: a laser pump source and a drive circuit for a pulsed laser as claimed in any one of the preceding claims.
According to the technical scheme, the controller is electrically connected with the control ends of the modulation circuits respectively, the output ends of the modulation circuits are electrically connected with the laser pumping sources of the pulse lasers, so that the controller can correspondingly provide corresponding driving signals for the modulation circuits according to the obtained expected emergent laser waveforms, and the modulation circuits provide corresponding modulation signals for the laser pumping sources under the control of the received driving signals so as to control the laser waveforms emitted by the pulse lasers, and therefore the pulse lasers can emit pulse lasers identical to the expected emergent laser waveforms, the output accuracy of the pulse lasers is improved, and the wider processing technology requirements are met.
It should be understood that the description in this section is not intended to identify key or critical features of the embodiments of the invention or to delineate the scope of the invention. Other features of the present invention will become apparent from the description that follows.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a driving circuit of a pulse laser according to an embodiment of the present invention;
Fig. 2 is a schematic structural diagram of a driving circuit of another pulse laser according to an embodiment of the present invention;
FIG. 3 is a schematic diagram illustrating laser waveform decomposition according to an embodiment of the present invention;
fig. 4 is a flowchart of a control method of a driving circuit of a pulse laser according to an embodiment of the present invention;
fig. 5 is a flowchart of a control method of a driving circuit of another pulse laser according to an embodiment of the present invention.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein.
The embodiment provides a driving circuit of a pulse laser, which is used for driving the pulse laser. Fig. 1 is a schematic structural diagram of a driving circuit of a pulse laser according to an embodiment of the present invention, as shown in fig. 1, the pulse laser 10 at least includes a laser pumping source 11, a driving circuit 20 of the pulse laser 10 includes a controller 21 and a plurality of modulation circuits 22, and the controller 21 is electrically connected to a control end of each modulation circuit 22 respectively; the output end of each modulation circuit 22 is electrically connected with the laser pumping source 11; the controller 21 is configured to acquire a laser waveform expected to be emitted by the pulse laser 10, and provide corresponding driving signals to the modulation circuits 22 in a one-to-one correspondence manner according to the expected laser waveform; the modulation circuit 22 is used for providing a corresponding modulation signal to the laser pumping source 11 under the control of the received driving signal so as to control the laser waveform emitted by the pulse laser 10.
The pulse laser 10 may be, but not limited to, a pulse fiber laser, where the pulse laser 10 includes at least a laser pump source 11, and may further include a laser medium and a resonant cavity, where the laser pump source 11 is configured to provide energy to the laser medium, so that atoms in the laser medium are excited to a high energy level to form atoms in an excited state, and when the atoms in the excited state return to a low energy level, photon energy is released to form laser light. The controller 21 may include, but is not limited to, at least one of an FPGA, a CPLD, and the like. The modulation circuit 22 may include, but is not limited to, a small current amplification circuit or the like.
The laser waveform expected to be emitted may be a laser waveform set according to the processing process requirement, and by way of example, the laser waveform expected to be emitted may be a square wave, a triangular wave, a gaussian wave, or the like. The drive signal may include, but is not limited to, a digital signal, a voltage signal, a current signal, or the like. The modulated signal may include, but is not limited to, a digital signal, a voltage signal, a current signal, or the like.
Specifically, the controller 21 is electrically connected to the control end of each modulation circuit 22, and the output end of each modulation circuit 22 is electrically connected to the laser pump source 11, that is, the controller 21 is electrically connected to the laser pump source 11 through each modulation circuit 22 connected in parallel. The controller 21 acquires the laser waveform expected to be emitted by the pulse laser 10, generates driving signals corresponding to the modulation circuits 22 one by one according to the expected laser waveform, and provides the driving signals to the corresponding modulation circuits 22 one by one; each modulation circuit 22 provides a corresponding modulation signal to the laser pump source 11 under control of the received drive signal. It will be appreciated that since each modulation circuit 22 is connected in parallel between the controller 21 and the laser pump source 11, the modulation signals provided by each modulation circuit 22 to the laser pump source 11 drive the laser pump source 11 in common, thereby controlling the laser waveform emitted by the pulse laser 10.
It should be noted that fig. 1 only illustrates a case where the driving circuit 20 of the pulse laser 10 includes 4 modulation circuits 22, and the number of modulation circuits 22 is not limited, in this embodiment, the number of modulation circuits 22 may be determined according to the requirement of the processing technology on the accuracy of the laser waveform and the energy requirement corresponding to the laser waveform, and the number of modulation circuits 22 is not particularly limited in this embodiment.
According to the embodiment, the controller is electrically connected with the control ends of the modulation circuits respectively, the output ends of the modulation circuits are electrically connected with the laser pumping sources of the pulse lasers, so that the controller can provide corresponding driving signals for the modulation circuits in a one-to-one correspondence mode according to the obtained expected emergent laser waveforms, and the modulation circuits provide corresponding modulation signals for the laser pumping sources under the control of the received driving signals so as to control the laser waveforms emitted by the pulse lasers, and therefore the pulse lasers can emit pulse lasers with the same laser waveforms as the expected emergent laser waveforms, the output accuracy of the pulse lasers is improved, and the wider processing technology requirements are met.
Optionally, fig. 2 is a schematic structural diagram of a driving circuit of another pulse laser provided in an embodiment of the present invention, and fig. 3 is a schematic diagram of laser waveform decomposition provided in an embodiment of the present invention, and referring to fig. 2 and 3, an input end of each modulation circuit 22 receives a bias signal; the controller 21 is specifically configured to acquire a laser waveform expected to be emitted by the pulse laser 10, decompose the laser waveform into a plurality of sub-waveforms, and control the number of active levels of the driving signal and the number of inactive levels of the driving signal provided in a time period to which the sub-waveforms belong according to the maximum amplitude and the minimum amplitude of each sub-waveform; the modulation circuit 22 is specifically configured to supply the bias current signal to the laser pumping source 11 as a modulation signal according to the bias signal when the active level of the drive signal is received, and to stop the supply of the bias current signal to the laser pumping source 11 when the inactive level of the drive signal is received.
Wherein the bias signal may include, but is not limited to, a current signal. The controller 21 may, but is not limited to, decompose the laser waveform into a plurality of sub-waveforms based on the respective modulation circuits 22 and the bias signal, and calculate the belonging time periods of the plurality of sub-waveforms based on the laser waveform. In an exemplary embodiment, controlling the number of active levels of the driving signal and the number of inactive levels of the driving signal provided in the period to which each sub-waveform belongs according to the maximum amplitude and the minimum amplitude of each sub-waveform may specifically include controlling the number of active levels of the driving signal and the number of inactive levels of the driving signal provided in the period to which each sub-waveform belongs according to an average value of the maximum amplitude and the minimum amplitude of each sub-waveform, wherein the active levels may be level signals controlling the turn-on of the modulation circuit 22, and the inactive levels may be level signals controlling the turn-off of the modulation circuit 22.
Specifically, the controller 21 is electrically connected to the control end of each modulation circuit 22, the output end of each modulation circuit 22 is electrically connected to the laser pumping source 11, and the input end of each modulation circuit 22 receives the bias signal; the controller 21 acquires the laser waveform expected to be emitted by the pulse laser 10, and decomposes the laser waveform expected to be emitted into a plurality of sub-waveforms, thereby controlling the number of active levels and the number of inactive levels of the driving signals provided in the period to which the sub-waveforms belong according to the maximum amplitude and the minimum amplitude of each sub-waveform, and providing each driving signal to the corresponding modulation circuit 22 in a one-to-one correspondence; the modulation circuit 22 receiving the active level of the driving signal provides the bias current signal as the modulation signal to the laser pumping source 11 according to the bias signal, and the modulation circuit 22 receiving the inactive level of the driving signal stops providing the bias current signal to the laser pumping source 11, so that the driving circuit 20 can control the laser waveform emitted by the pulse laser 10 according to the laser waveform expected to be emitted, thereby meeting the requirement of wider processing technology.
In an exemplary embodiment, referring to fig. 3, the controller 21 obtains the laser waveform expected to be emitted by the pulse laser 10, and decomposes the laser waveform expected to be emitted into sub-waveform 1, sub-waveform 2, sub-waveform 3, sub-waveform 4, sub-waveform 5, sub-waveform 6, sub-waveform 7, sub-waveform 8, sub-waveform 9, and sub-waveform 1 belongs to a time period a, sub-waveform 2 belongs to a time period b, sub-waveform 3 belongs to a time period c, sub-waveform 4 belongs to a time period d, sub-waveform 5 belongs to a time period e, sub-waveform 6 belongs to a time period f, sub-waveform 7 belongs to a time period g, sub-waveform 8 belongs to a time period h, sub-waveform 9 belongs to a time period i, so that the controller 21 provides an active level of a driving signal corresponding to one of the modulation circuits 22 in a time period, the driving signal corresponding to the remaining modulation circuits 22 in the time period b is an inactive level, the driving signal corresponding to the two modulation circuits 22 in the time period b is an active level, the remaining modulation circuits 22 are provided in the driving signal corresponding to the inactive level of the active level of the driving signal corresponding to the active level of the driving signal of the modulation circuits 22 in the time period a, the driving signal corresponding to the inactive level of the driving signal of the remaining modulation circuits 22 is provided in the time period b, and the driving signal of the driving signal corresponding to the active level of the driving signal of the sub-waveform 22 is provided in the phase of the pulse waveform increases according to the maximum amplitude and minimum amplitude of the sub-waveform 1; in the stage where the amplitude of the pulse waveform decreases, for example, the active level of the driving signals corresponding to four of the modulation circuits 22 is supplied in the period f, the driving signals corresponding to the remaining modulation circuits 22 are inactive levels, the active level of the driving signals corresponding to three of the modulation circuits 22 is supplied in the period g, the driving signals corresponding to the remaining modulation circuits 22 are inactive levels, the active level of the driving signals corresponding to two of the modulation circuits 22 is supplied in the period h, the driving signals corresponding to the remaining modulation circuits 22 are inactive levels, the active level of the driving signals corresponding to one of the modulation circuits 22 is supplied in the period i, and the driving signals corresponding to the remaining modulation circuits 22 are inactive levels, so that it is possible to control the laser waveform emitted by the pulse laser 10 according to the laser waveform expected to be emitted.
Optionally, with continued reference to fig. 2, the modulation circuit 22 includes at least a first resistor 221 and a transistor 222; the control electrode of the transistor 222 is electrically connected to the controller 21 through a first resistor; a first pole of transistor 222 is electrically connected to a bias power supply; a second pole of the transistor 222 is electrically connected to the laser pump source 11.
The first resistor 221 may be a voltage dividing resistor, which is used to divide the signal provided by the controller 21 into a signal capable of controlling the transistor 222 to be turned on or off, and the first resistor 221 may also protect the transistor 222; the transistor 222 may be, but is not limited to, a triode, etc., for example, when the transistor 222 is a triode, the first pole of the transistor 222 is a collector of the triode, the second pole of the transistor 222 is an emitter of the triode, the control pole of the triode is electrically connected with the controller 21 through the first resistor 221 and is used for controlling the conduction condition of the triode according to the driving signal provided by the controller 21, the collector of the triode is electrically connected with the bias power supply and is used for providing the bias signal to the triode when the triode is conducted, and the emitter of the triode is electrically connected with the laser pump source 11 and is used for providing the bias signal to the laser pump source 11 when the triode is conducted. In this way, by making the modulation circuit 22 composed of the first resistor 221 and the transistor 222, the modulation circuit 22 has a simple structure, so that it is advantageous to simplify the structure of the driving circuit while being able to control the laser waveform emitted from the pulse laser, and further, it is possible to reduce the size of the driving circuit and the cost of the driving circuit.
Optionally, with continued reference to fig. 2, the driving circuit 20 of the pulse laser 10 further includes a bias circuit 23, where the bias circuit 23 is electrically connected to an input terminal of each modulation circuit 22; the bias circuit 23 is configured to provide a bias signal to each modulation circuit 22, the bias circuit 23 being capable of converting a voltage signal into a corresponding current signal for provision to each modulation circuit. It will be appreciated that the specific structure of the bias circuit 23 may be set as required, and the embodiment of the present invention is not limited to the specific structure of the bias circuit on the premise that the bias signal can be provided to each modulation circuit.
Optionally, with continued reference to fig. 2, the driving circuit 20 of the pulse laser 10 further includes a plurality of delay circuits 24 in one-to-one correspondence with the modulation circuits 22; the controller 21 is electrically connected to each delay circuit 24; the controller 21 is also configured to provide a delay signal to the delay circuit 24; the delay circuit 24 is used for providing the delay time of the driving signal to the corresponding modulation circuit 22 by the feedback controller 21 according to the delay signal.
Specifically, the controller 21 is electrically connected to each delay circuit 24, and the controller 21 provides a delay signal to the delay circuit 24, so that the delay circuit 24 provides a delay time of the driving signal to the corresponding modulation circuit 22 according to the delay signal, so that each modulation circuit 22 receives an active level of the corresponding driving signal in a time period to which the sub-waveform belongs, provides a bias current signal as a modulation signal to the laser pump source 11 according to the bias signal, or receives an inactive level of the corresponding driving signal in the time period to which the sub-waveform belongs, and stops providing the bias current signal to the laser pump source 11. In this way, by providing the delay circuit 24, the on/off time of each modulation circuit 22 can be controlled, and the laser waveform emitted from the pulse laser 10 can be controlled, so as to meet the requirements of a wider processing technology.
Wherein the delay circuit 24 may include, but is not limited to, a delay resistor or a delay line. In an alternative embodiment, with continued reference to fig. 2, the delay circuit 24 includes a second resistor 241, one end of the second resistor 241 is electrically connected to the delay signal output terminal of the controller 21, and the other end of the second resistor 241 is electrically connected to the delay signal input terminal of the controller 21, so as to implement delay time for providing the driving signal to the corresponding modulation circuit 22 by the feedback controller 21 according to the delay signal.
Optionally, with continued reference to fig. 2, the driving circuit 20 of the pulse laser 10 further includes a power supply circuit 25, where the power supply circuit 25 is electrically connected to the laser pump source 11, and the power supply circuit 25 is configured to provide a power supply for the laser pump source 11, so that the pulse laser 10 can emit laser light.
Based on the same inventive concept, the embodiments of the present invention provide a control method of a driving circuit of a pulse laser, which can be applied to the driving circuit of the pulse laser provided in any embodiment of the present invention. Fig. 4 is a flowchart of a control method of a driving circuit of a pulse laser according to an embodiment of the present invention. Referring to fig. 4, the method includes:
and S110, the controller acquires laser waveforms expected to be emitted by the pulse laser, and provides corresponding driving signals for each modulation circuit in a one-to-one correspondence mode according to the laser waveforms expected to be emitted.
The laser waveform expected to be emitted may be a laser waveform set according to the requirements of the processing technology, and exemplary, the laser waveform expected to be emitted may be a square wave, a triangular wave, a gaussian wave, or the like. The drive signal may include, but is not limited to, a digital signal, a voltage signal, a current signal, or the like.
And S120, the modulation circuit provides a corresponding modulation signal for the laser pumping source under the control of the received driving signal so as to control the laser waveform emitted by the pulse laser.
Wherein the modulated signal may include, but is not limited to, a digital signal, a voltage signal, a current signal, or the like. The laser waveform expected to be emitted can be preset by a user according to actual needs, at this time, the user can set the laser waveform through a corresponding man-machine interaction system, and the controller can receive the laser waveform expected to be emitted through the man-machine interaction system.
Specifically, the controller acquires laser waveforms expected to be emitted by the pulse laser, generates driving signals corresponding to the modulation circuits one by one according to the laser waveforms expected to be emitted, and provides the driving signals to the corresponding modulation circuits one by one; and each modulation circuit provides a corresponding modulation signal for the laser pumping source under the control of the received driving signal, and the modulation signals provided by each modulation circuit for the laser pumping source drive the laser pumping source together, so that the laser waveform emitted by the pulse laser is controlled.
In this embodiment, the controller obtains the laser waveform expected to be emitted by the pulse laser, and provides the corresponding driving signals to each modulation circuit in a one-to-one correspondence manner according to the expected laser waveform, and the modulation circuit provides the corresponding modulation signals to the laser pumping source under the control of the received driving signals, so as to control the laser waveform emitted by the pulse laser, so that the pulse laser can emit the pulse laser with the same laser waveform as the expected laser waveform according to the expected laser waveform, thereby meeting the wider processing technology requirements.
Fig. 5 is a flowchart of another method for controlling a driving circuit of a pulse laser according to an embodiment of the present invention, where the method for controlling a driving circuit of a pulse laser is further defined on the basis of the above embodiment, and referring to fig. 5, the method for controlling a driving circuit of a pulse laser specifically includes:
S210, the controller acquires laser waveforms expected to be emitted by the pulse laser, decomposes the laser waveforms into a plurality of sub-waveforms, and controls the number of effective levels of driving signals and the number of ineffective levels of the driving signals provided in a time period to which the sub-waveforms belong according to the maximum amplitude and the minimum amplitude of each sub-waveform.
In an exemplary embodiment, controlling the number of active levels of the driving signal and the number of inactive levels of the driving signal provided in the period to which each sub-waveform belongs according to the maximum amplitude and the minimum amplitude of each sub-waveform may specifically include controlling the number of active levels of the driving signal and the number of inactive levels of the driving signal provided in the period to which each sub-waveform belongs according to an average value of the maximum amplitude and the minimum amplitude of each sub-waveform, wherein the active levels may be level signals controlling the turn-on of the modulation circuit, and the inactive levels may be level signals controlling the turn-off of the modulation circuit.
S220 of providing a bias current signal as a modulation signal to the laser pumping source according to the bias signal when the active level of the driving signal is received, and stopping providing the bias current signal to the laser pumping source when the inactive level of the driving signal is received.
Wherein the bias signal may be, but is not limited to, a current signal.
In this embodiment, a controller obtains a laser waveform expected to be emitted by a pulse laser, and decomposes the laser waveform expected to be emitted into a plurality of sub-waveforms, so as to control the number of effective levels and the number of ineffective levels of driving signals provided in a time period to which each sub-waveform belongs according to a maximum amplitude and a minimum amplitude of each sub-waveform, and provide each driving signal to a corresponding modulation circuit in a one-to-one correspondence manner; the modulation circuit which receives the effective level of the driving signal provides the bias current signal as the modulation signal to the laser pumping source according to the bias signal, and the modulation circuit which receives the ineffective level of the driving signal stops providing the bias current signal to the laser pumping source, so that the driving circuit can control the laser waveform emitted by the pulse laser according to the expected emitted laser waveform, thereby meeting the requirement of wider processing technology.
Based on the same inventive concept, the embodiment of the invention also provides a pulse laser, which comprises a laser pumping source and the driving circuit of the pulse laser provided by any embodiment. Since the pulse laser provided in this embodiment includes the driving circuit of the pulse laser provided in any embodiment of the present invention, the pulse laser provided in this embodiment of the present invention may have the corresponding structure and features of the driving circuit of the pulse laser provided in this embodiment of the present invention, so that the beneficial effects of the driving circuit of the pulse laser provided in this embodiment of the present invention may be achieved, and the same points may be described above.
The above embodiments do not limit the scope of the present invention. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of the present invention.
Claims (8)
1. A driving circuit of a pulse laser for driving the pulse laser, wherein the pulse laser comprises at least a laser pumping source, the driving circuit of the pulse laser comprising: a controller and a plurality of modulation circuits;
The controller is electrically connected with the control end of each modulation circuit respectively; the output end of each modulation circuit is electrically connected with the laser pumping source;
the controller is used for acquiring laser waveforms expected to be emitted by the pulse laser and providing corresponding driving signals for the modulation circuits in a one-to-one correspondence mode according to the laser waveforms expected to be emitted;
the modulation circuit is used for providing a corresponding modulation signal for the laser pumping source under the control of the received driving signal so as to control the laser waveform emitted by the pulse laser;
The input end of each modulation circuit receives a bias signal;
The controller is specifically used for: acquiring laser waveforms expected to be emitted by the pulse laser, decomposing the laser waveforms into a plurality of sub-waveforms, and controlling the number of effective levels of driving signals and the number of ineffective levels of the driving signals provided in a time period to which the sub-waveforms belong according to the maximum amplitude and the minimum amplitude of each sub-waveform;
the modulation circuit is specifically configured to provide a bias current signal to the laser pumping source as the modulation signal according to the bias signal when an active level of the drive signal is received, and to stop providing the bias current signal to the laser pumping source when an inactive level of the drive signal is received.
2. The driving circuit of the pulse laser according to claim 1, wherein the modulation circuit includes at least a first resistor and a transistor;
The control electrode of the transistor is electrically connected with the controller through the first resistor; a first pole of the transistor is electrically connected with a bias power supply; the second pole of the transistor is electrically connected with the laser pumping source.
3. The drive circuit of the pulse laser according to claim 1, further comprising: a bias circuit;
The bias circuit is electrically connected with the input end of each modulation circuit; the bias circuit is used for providing bias signals to each of the modulation circuits.
4. The driving circuit of the pulse laser according to claim 1, further comprising a plurality of delay circuits corresponding one-to-one to each of the modulation circuits;
The controller is respectively and electrically connected with each delay circuit;
the controller is further configured to provide a delay signal to the delay circuit;
the delay circuit is used for feeding back the delay time of the driving signal provided by the controller to the corresponding modulation circuit according to the delay signal.
5. The drive circuit of the pulse laser according to claim 4, wherein the delay circuit comprises a second resistor;
one end of the second resistor is electrically connected with the delay signal output end of the controller respectively, and the other end of the second resistor is electrically connected with the delay signal input end of the controller.
6. The drive circuit of the pulse laser according to claim 1, further comprising: a power supply circuit;
The power supply circuit is electrically connected with the laser pumping source; the power supply circuit is used for providing a power supply for the laser pumping source.
7. A control method applied to the driving circuit of the pulse laser according to any one of claims 1 to 6, characterized by comprising:
The controller acquires laser waveforms expected to be emitted by the pulse laser, decomposes the laser waveforms into a plurality of sub-waveforms, and controls the number of effective levels of driving signals and the number of ineffective levels of the driving signals provided in a time period to which the sub-waveforms belong according to the maximum amplitude and the minimum amplitude of each sub-waveform;
Providing a bias current signal to the laser pump source as the modulation signal in response to a bias signal when an active level of the drive signal is received, and ceasing to provide a bias current signal to the laser pump source when an inactive level of the drive signal is received.
8. A pulsed laser, comprising: a laser pump source and a driving circuit for a pulsed laser according to any one of claims 1-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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