CN113140953B - Laser signal control method and device, laser and readable storage medium - Google Patents
Laser signal control method and device, laser and readable storage medium Download PDFInfo
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- CN113140953B CN113140953B CN202110346223.3A CN202110346223A CN113140953B CN 113140953 B CN113140953 B CN 113140953B CN 202110346223 A CN202110346223 A CN 202110346223A CN 113140953 B CN113140953 B CN 113140953B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/09—Processes or apparatus for excitation, e.g. pumping
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/10084—Frequency control by seeding
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/11—Mode locking; Q-switching; Other giant-pulse techniques, e.g. cavity dumping
Abstract
The application is applicable to the technical field of lasers, and provides a control method and device of laser signals, a laser and a readable storage medium, wherein the method comprises the following steps: acquiring a first driving signal and a second driving signal, wherein the first driving signal comprises a plurality of first trigger signals, the second driving signal comprises a plurality of second trigger signals, and the first frequency of the first trigger signals is higher than the second frequency of the second trigger signals; driving a first modulator to modulate the seed optical signal according to a first driving signal to obtain a modulated laser signal; inputting the modulated laser signal into an amplifier to obtain an amplified laser signal; and driving a second modulator to modulate the amplified laser signal according to the second driving signal to obtain a target laser signal. The method and the device can solve the problem that the laser element is easily damaged by the existing laser signal control method to a certain extent.
Description
Technical Field
The present application relates to the field of lasers, and in particular, to a method and an apparatus for controlling a laser signal, a laser, and a readable storage medium.
Background
With the development of science and technology, the performance of the laser is better and better, and the application of the laser is wider and wider. For example, lasers are used for marking.
At present, when marking is performed by using a laser, a Position Synchronized Output (PSO) mode is generally used, that is, a PSO signal is sent out to make the laser emit light every time a target position is reached. However, at present, since the frequency of the first driving signal for controlling the first modulator is consistent with the frequency of the PSO signal, the power of the laser signal after passing through the first modulator is low, and the power of the pump light in the amplifier is generally a fixed value.
Therefore, the laser element is easily damaged by the current control method of the laser signal.
Disclosure of Invention
The embodiment of the application provides a control method and device of a laser signal, a laser and a readable storage medium, which can solve the problem that the laser element is easily damaged by the existing control method of the laser signal to a certain extent.
In a first aspect, an embodiment of the present application provides a method for controlling a laser signal, including:
Acquiring a first driving signal and a second driving signal, wherein the first driving signal comprises a plurality of first trigger signals, the second driving signal comprises a plurality of second trigger signals, and the first frequency of the first trigger signals is higher than the second frequency of the second trigger signals;
driving a first modulator to modulate the seed optical signal according to the first driving signal to obtain a modulated laser signal;
inputting the modulated laser signal into an amplifier to obtain an amplified laser signal;
and driving a second modulator to modulate the amplified laser signal according to the second driving signal to obtain a target laser signal.
Optionally, the driving the first modulator according to the first driving signal to modulate the seed optical signal to obtain a modulated laser signal includes:
and driving the first modulator to modulate the seed optical signal according to the first frequency of the first trigger signal and the first signal width of the first trigger signal to obtain a modulated optical signal.
Optionally, before the driving the first modulator to modulate the seed optical signal according to the first frequency of the first trigger signal and the first signal width of the first trigger signal to obtain the modulated optical signal, the method further includes:
Acquiring the number of target sub-pulses, the first frequency and the third frequency of the seed optical signal;
when a target control signal is received, determining a first signal width according to the target sub-pulse number and the third frequency;
the first driving signal is generated based on the first frequency and the first signal width.
Optionally, the driving the first modulator according to the first driving signal to modulate the seed optical signal to obtain a modulated laser signal includes:
driving the first modulator and recognizing a rising edge of the seed optical signal passing through the first debugger when the first trigger signal is detected;
and turning off the first modulator when the number of the rising edges is equal to the target pulse count.
Optionally, the driving a second modulator according to the second driving signal to modulate the amplified laser signal to obtain a target laser signal includes:
and driving the second modulator to modulate the amplified laser signal according to a second frequency of the second trigger signal and a second signal width of the second trigger signal to obtain a target laser signal.
Optionally, before the driving the second modulator to modulate the amplified laser signal according to the second frequency of the second trigger signal and the second signal width of the second trigger signal to obtain the target laser signal, the method includes:
Acquiring the number of target pulses, the second frequency and a third frequency of the seed optical signal;
when a target control signal is received, determining the width of the second signal according to the target pulse number and the third frequency;
the second driving signal is generated according to the second frequency and the second signal width.
In a second aspect, an embodiment of the present application provides an apparatus for controlling a laser signal, including:
the device comprises a signal acquisition module, a signal processing module and a signal processing module, wherein the signal acquisition module is used for acquiring a first driving signal and a second driving signal, the first driving signal comprises a plurality of first trigger signals, the second driving signal comprises a plurality of second trigger signals, and the first frequency of the first trigger signals is higher than the second frequency of the second trigger signals;
the first modulation module is used for driving a first modulator to modulate the seed optical signal according to the first driving signal to obtain a modulated laser signal;
the signal amplification module is used for inputting the modulated laser signal into an amplifier to obtain an amplified laser signal;
and the second modulation module is used for driving a second modulator to modulate the amplified laser signal according to the second driving signal to obtain a target laser signal.
In a third aspect, an embodiment of the present application provides a laser, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and when the processor executes the computer program, the steps of the method described in the first aspect are implemented.
In a fourth aspect, the present application provides a computer-readable storage medium, where a computer program is stored, and the computer program, when executed by a processor, implements the steps of the method as described in the first aspect.
In a fifth aspect, the present application provides a computer program product, which when run on a laser, causes the laser to execute the method for controlling a laser signal according to any one of the first aspect.
It is to be understood that, for the beneficial effects of the second aspect to the fifth aspect, reference may be made to the relevant description in the first aspect, and details are not described herein again.
Compared with the prior art, the embodiment of the application has the beneficial effects that:
the application provides a control method of a laser signal, which includes the steps of firstly, obtaining a first driving signal and a second driving signal, wherein the first driving signal comprises a plurality of first trigger signals, the second driving signal comprises a plurality of second trigger signals, and the first frequency of the first trigger signals is higher than the second frequency of the second trigger signals. And then driving a first modulator to modulate the seed optical signal according to the first driving signal to obtain a modulated laser signal. The modulated laser signal is then input to an amplifier to obtain an amplified laser signal. And finally, driving a second modulator to modulate the amplified laser signal according to a second driving signal to obtain a target laser signal. Since the first frequency of the first trigger signal is higher than the second frequency of the second trigger signal, the total power of the resulting modulated laser signal becomes large, i.e. the total power of the modulated laser signal input to the amplifier becomes large. Since the total power of the modulated laser signal input to the amplifier becomes large, it is possible to attenuate phenomena such as amplifier spontaneous emission, stimulated raman, and stimulated brillouin, thereby preventing damage to the laser element.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a laser according to an embodiment of the present application;
FIG. 2 is a timing diagram of a first driving signal, a second driving signal and a PSO signal according to an embodiment of the present disclosure;
FIG. 3 is another timing diagram of the first driving signal, the second driving signal and the PSO signal according to an embodiment of the present disclosure;
fig. 4 is a schematic flowchart of a method for controlling a laser signal according to an embodiment of the present disclosure;
FIG. 5 is another timing diagram of the first driving signal and the PSO signal according to an embodiment of the present disclosure;
FIG. 6 is another timing diagram of the first driving signal, the second driving signal and the PSO signal according to an embodiment of the present disclosure;
fig. 7 is a schematic structural diagram of a control device for laser signals according to an embodiment of the present application;
Fig. 8 is a schematic structural diagram of a laser provided in an embodiment of the present application.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It should also be understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.
As used in this specification and the appended claims, the term "if" may be interpreted contextually as "when", "upon" or "in response to a determination" or "in response to a detection". Similarly, the phrase "if it is determined" or "if a [ described condition or event ] is detected" may be interpreted contextually to mean "upon determining" or "in response to determining" or "upon detecting [ described condition or event ]" or "in response to detecting [ described condition or event ]".
Furthermore, in the description of the present application and the appended claims, the terms "first," "second," "third," and the like are used for distinguishing between descriptions and not necessarily for describing or implying relative importance.
Reference throughout this specification to "one embodiment" or "some embodiments," or the like, means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the present application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," or the like, in various places throughout this specification are not necessarily all referring to the same embodiment, but rather "one or more but not all embodiments" unless specifically stated otherwise. The terms "comprising," "including," "having," and variations thereof mean "including, but not limited to," unless expressly specified otherwise.
In order to explain the technical solution described in the present application, the following description will be given by way of specific examples.
Example one
The composition of the laser is generally as shown in figure 1. At present, when a laser is used for marking, a processing control system generates a first driving signal and a second driving signal according to a PSO signal, and then sends the first driving signal and the second driving signal to a laser control board.
After the laser control board receives the first driving signal and the second driving signal, the first modulator is driven according to the first driving signal to perform frequency selection on the seed optical signal to obtain a modulated laser signal, at the moment, the frequency of the modulated laser signal is generally reduced to dozens of kHz to several MHz, and the frequency of the seed optical signal is generally 30-50 MHz. Therefore, the frequency of the modulated laser signal is reduced compared to the frequency of the seed light.
Since the frequency of the modulated laser signal decreases, if the first frequency of the first drive signal coincides with the second frequency of the second drive signal, that is, if the first frequency of the first drive signal coincides with the frequency of the PSO signal (as shown in fig. 2), the optical power of the modulated laser signal finally input into the amplifier becomes smaller. Whereas the power of the pump light in the amplifier is typically a fixed value. Therefore, the phenomena of amplifier spontaneous emission, stimulated raman, and stimulated brillouin are intensified at this time, and the laser element is damaged. Such as damage to the optical fiber.
In order to solve the technical problem that a laser element is easily damaged by a conventional laser signal control method, in the laser signal control method provided in the embodiments of the present application, by setting a first frequency of a first trigger signal higher than a second frequency of a second trigger signal, where the second frequency of the second trigger signal is consistent with a frequency of a PSO signal, that is, setting the first frequency of the first trigger signal to be higher than the frequency of the PSO signal (as shown in fig. 3), a total power of a modulated laser signal obtained after passing through a first modulator becomes larger, that is, a total power of a modulated laser signal input to an amplifier becomes larger. Since the total power of the modulated laser signal input to the amplifier becomes large, the phenomena of amplifier spontaneous emission, stimulated raman, stimulated brillouin, and the like can be reduced, thereby preventing damage to the laser element. And finally, screening the modulated laser signals according to the second driving signal to obtain target laser signals meeting the requirements.
Next, a detailed description is given of a method for controlling a laser signal according to an embodiment of the present application, with reference to fig. 4, where the method includes:
step S401, obtaining a first driving signal and a second driving signal, where the first driving signal includes a plurality of first trigger signals, the second driving signal includes a plurality of second trigger signals, and a first frequency of the first trigger signal is higher than a second frequency of the second trigger signals.
In step S401, the first trigger signal is a signal for starting the operation of the first modulator, and may be a high level in the first driving signal or a low level in the first driving signal. Similarly, the second trigger signal is a signal for starting the second modulator, and may be a high level in the second driving signal or a low level in the second driving signal. For the specific form of the first trigger signal and the second trigger signal, the user may select the specific form according to the actual situation, and the application is not limited herein.
The first drive signal and the second drive signal are generated from the PSO signal. It should be noted that the processing control system may generate the first driving signal and the second driving signal according to the PSO signal, and then the processing control system sends the first driving signal and the second driving signal to the laser control board, and the laser controller board obtains the first driving signal and the second driving signal.
Or the processing control system sends the PSO signal to the laser control board, and the laser control board generates the first driving signal and the second driving signal according to the PSO signal. The user of the generation device for the first driving signal and the second driving signal may select the generation device according to actual situations, and the application is not limited in detail herein.
In some embodiments, the process control system generates the PSO signal based on the synchronization signal and an initial control signal sent by the motor prior to generating the first drive signal and the second drive signal based on the PSO signal. Currently, the synchronization signal is generally a modulated laser signal obtained after passing through the first modulator. However, the frequency of the modulated laser signal is low, so that the accuracy of synchronization of the finally obtained target laser signal and the PSO signal is low, thereby reducing the processing precision.
In order to improve the processing accuracy, in this embodiment, the pulse signal of the seed source is used as the synchronization signal, that is, the processing control system receives the pulse signal of the seed source and the initial control signal sent by the motor, and then uses the pulse signal of the seed source as the synchronization signal to generate the PSO signal.
Due to the fact that the frequency of the pulse signal of the seed source is high, delay jitter between the target laser signal and the PSO signal is small, and the accuracy of synchronization of the target laser signal and the PSO signal is high. Since the target laser signal and the PSO signal are synchronized with high accuracy, the processing accuracy can be improved when the target laser signal is used for processing.
Step S402, driving a first modulator to modulate the seed optical signal according to the first driving signal to obtain a modulated laser signal.
In step S402, after the laser control board acquires the first driving signal, the laser control board drives the first modulator to modulate the seed optical signal according to the first driving signal, so as to obtain a modulated laser signal.
In some possible implementations, the laser control board may drive the first modulator to modulate the seed optical signal according to the first frequency of the first trigger signal and the first signal width of the first trigger signal, so as to obtain the modulated optical signal.
In the related art, the number of pulses and the number of sub-pulses of the target laser signal are generally determined by a first signal width of the first trigger signal or a second signal width of the second trigger signal. The first signal width and the second signal width are generally determined by the width of the PSO signal. That is, in the related art, the number of pulses and the number of sub-pulses of the target laser signal are generally determined by the width of the PSO signal. For example, as can be seen from both fig. 2 and 3, the first signal width and the second signal width become smaller as the width of the PSO signal becomes smaller.
However, in practical applications, the width of the PSO signal is difficult to be accurately controlled, so that the width of the first signal and the width of the second signal are also difficult to be accurately controlled, and the pulse number and the sub-pulse number of the target laser signal are difficult to be accurately controlled.
In order to solve the technical problem that it is relatively difficult to accurately control the sub-pulse number of the target laser signal, the present embodiment directly associates the target sub-pulse number with the first signal width, that is, directly controls the first signal width according to the target sub-pulse number, and then controls the first signal width to make the sub-pulse number of the target laser signal equal to the target sub-pulse number, so that the width of the PSO signal does not need to be controlled according to the target sub-pulse number. Since the first signal width is relatively easy to control accurately, in the present embodiment, the number of sub-pulses of the target laser signal can be controlled accurately.
Illustratively, the method for controlling the width of the first signal directly according to the number of target sub-pulses in the present embodiment is:
the processing control system obtains the number of target sub-pulses, the first frequency and a third frequency of the seed optical signal. And then when the processing control system receives the target control signal, the processing control system determines the width of the first signal according to the target sub-pulse number and the third frequency. And finally, the processing control system generates a first driving signal according to the first frequency and the first signal width.
That is, in this embodiment, the target control signal (the target control signal refers to the PSO signal) is only used as a trigger signal, and then the first driving signal is generated according to the target sub-pulse number, the first frequency and the third frequency of the seed optical signal, but not according to the PSO signal, so that it is not necessary to control the width of the PSO signal according to the target sub-pulse number first, and then control the width of the first signal according to the width of the PSO signal.
The first driving signal generated according to the number of target sub-pulses, the first frequency and the third frequency of the seed light signal may be as shown in fig. 5. As can be seen from fig. 5, the first signal width of the first trigger signal does not vary with the variation of the width of the PSO signal.
In addition, since one processing control system generally controls a plurality of lasers, the number of sub-pulses of the target laser signal obtained by each laser generally differs, and thus it is troublesome to modify parameters of the processing control system when the processing control system changes the laser to be controlled. For example, when the number of sub-pulses of the target laser signal obtained by the laser a is q and the number of sub-pulses of the target laser signal obtained by the laser B is p (q is different from p), parameters of the machining control system need to be modified when the control target controlled by the machining control system is changed from the laser a to the laser B.
Therefore, in order to more conveniently control the sub-pulse number of the target laser signal, the method of directly controlling the first signal width according to the target sub-pulse number may be performed by the laser control board, that is, the method of directly controlling the first signal width according to the target sub-pulse number is as follows:
The laser control panel firstly acquires the number of target sub-pulses, the first frequency and the third frequency of the seed optical signal. And then when the laser control panel receives the target control signal, the laser control panel determines the width of the first signal according to the target sub-pulse number and the third frequency. And finally, the laser control board generates a first driving signal according to the first frequency and the first signal width.
In other possible implementation manners, driving the first modulator to modulate the seed optical signal according to the first driving signal, and implementing the process of obtaining the modulated laser signal may also be: when the laser control board detects the first trigger signal, the laser control board drives the first modulator and recognizes a rising edge of the seed optical signal passing through the first modulator. Then, when the number of rising edges is equal to the number of target sub-pulses, the laser control board turns off the first modulator.
That is, in the present embodiment, the number of sub-pulses of the target laser signal is controlled to be equal to the target number of sub-pulses by recognizing the number of rising edges of the seed optical signal, and the number of sub-pulses of the target laser signal is controlled to be equal to the target number of sub-pulses without controlling the width of the PSO signal. And the identification of the number of rising edges of the seed optical signal is relatively easy to realize. Therefore, the number of sub-pulses of the target laser signal can also be accurately controlled in the present implementation.
And step S103, inputting the modulated laser signal into an amplifier to obtain an amplified laser signal.
In step S103, after obtaining the modulated laser signal, the laser control board inputs the modulated laser signal into the amplifier, thereby obtaining an amplified laser signal.
And step S104, driving a second modulator to modulate the amplified laser signal according to the second driving signal to obtain a target laser signal.
In step S104, after obtaining the amplified laser signal, the laser control board drives the second modulator to modulate the amplified laser signal according to the second driving signal, so as to obtain the target laser signal.
In some possible implementation manners, the laser control board may drive the second modulator to modulate the amplified laser signal according to a second frequency of the second trigger signal and a second signal width of the second trigger signal, so as to obtain the target laser signal
As can be seen from the above, the pulse number of the target laser signal is generally determined by the width of the PSO signal. And the width of the PSO signal is difficult to control accurately, resulting in difficulty in accurately controlling the number of pulses of the target laser signal.
In order to solve the technical problem that it is difficult to accurately control the pulse number of the target laser signal, in this embodiment, the target pulse number is directly associated with the second signal width, that is, the second signal width is directly controlled according to the target pulse number, and then the pulse number of the target laser signal is equal to the target pulse number by controlling the second signal width, so that the width of the PSO signal does not need to be controlled according to the target pulse number. Since the second signal width is relatively easy to control accurately, in the present embodiment, the number of pulses of the target laser signal can be controlled accurately.
Illustratively, the method of the present embodiment for controlling the width of the second signal directly according to the number of target pulses is:
the processing control system obtains the target pulse number, the second frequency and the third frequency of the seed optical signal. And then when the processing control system receives the target control signal, the processing control system determines the width of the second signal according to the target pulse number and the third frequency. And finally, the processing control system generates a second driving signal according to the second frequency and the second signal width.
That is, in this embodiment, the target control signal (the target control signal refers to the PSO signal) is only used as a trigger signal, and then the second driving signal is generated according to the target pulse number, the second frequency and the third frequency of the seed optical signal, but not according to the PSO signal, so that it is not necessary to control the width of the PSO signal according to the target pulse number first, and then control the width of the second signal according to the width of the PSO signal.
The second driving signal generated according to the number of target pulses, the second frequency, and the third frequency of the seed light signal may be as shown in fig. 6. As can be seen from fig. 6, the second signal width of the second trigger signal does not vary with the variation of the width of the PSO signal.
Further, since one processing control system generally controls a plurality of lasers, the number of pulses of a target laser signal obtained by each laser generally differs, so that it is troublesome to modify parameters of the processing control system when the controlled laser is replaced. For example, when the number of pulses of the target laser signal obtained by the laser a is w and the number of pulses of the target laser signal obtained by the laser B is y (w is different from y), the parameters of the machining control system need to be modified when the object to be controlled by the machining control system is changed from the laser a to the laser B.
Therefore, in order to more conveniently control the sub-pulse number of the target laser signal, the above method of directly controlling the width of the second signal according to the target pulse number may be performed by the laser control board, that is, the above method of directly controlling the width of the second signal according to the target pulse number is:
the laser control panel firstly obtains the target pulse number, the second frequency and the third frequency of the seed optical signal. And then when the laser control panel receives the target control signal, the laser control panel determines the width of a second signal according to the target pulse number and the third frequency. And finally, the laser control board generates a second driving signal according to the second frequency and the second signal width.
It should be noted that since the control of the first signal width directly according to the target sub-pulse number can accurately control the sub-pulse number of the target laser signal, the control of the second signal width directly according to the target pulse number can accurately control the pulse number of the target laser signal. Therefore, the laser control board can control the first signal width according to the number of target sub-pulses while controlling the second signal width according to the number of target pulses, thereby satisfying the diversity in processing using a laser.
It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by functions and internal logic of the process, and should not constitute any limitation to the implementation process of the embodiments of the present application.
Example two
Fig. 7 shows an example of a control device of a laser signal, and for convenience of explanation, only the part related to the embodiment of the present application is shown. The apparatus 700 comprises:
the signal obtaining module 701 is configured to obtain a first driving signal and a second driving signal, where the first driving signal includes a plurality of first trigger signals, the second driving signal includes a plurality of second trigger signals, and a first frequency of the first trigger signal is higher than a second frequency of the second trigger signals.
The first modulation module 702 is configured to drive the first modulator to modulate the seed optical signal according to the first driving signal, so as to obtain a modulated laser signal.
The signal amplifying module 703 is configured to input the modulated laser signal into an amplifier to obtain an amplified laser signal.
And the second modulation module 704 is configured to drive the second modulator to modulate the amplified laser signal according to the second driving signal, so as to obtain a target laser signal.
Optionally, the first modulation module 702 is specifically configured to perform:
and driving a first modulator to modulate the seed optical signal according to the first frequency of the first trigger signal and the first signal width of the first trigger signal to obtain a modulated optical signal.
Optionally, the apparatus 700 further comprises:
and the acquisition module is used for acquiring the number of target sub-pulses, the first frequency and the third frequency of the seed optical signal.
And the first width determining module is used for determining the width of the first signal according to the number of the target sub-pulses and the third frequency when the target control signal is received.
The first signal generating module is used for generating a first driving signal according to the first frequency and the first signal width.
Optionally, the first modulation module 702 includes:
and the detection and identification unit is used for driving the first modulator when the first trigger signal is detected, and identifying the rising edge of the seed optical signal passing through the first debugger.
And the closing unit is used for closing the first modulator when the number of the rising edges is equal to the number of the target sub-pulses.
Optionally, the second modulation module 704 is specifically configured to perform:
and driving a second modulator to modulate the amplified laser signal according to the second frequency of the second trigger signal and the second signal width of the second trigger signal to obtain a target laser signal.
Optionally, the obtaining module is further configured to:
the target pulse number, the second frequency, and a third frequency of the seed light signal are obtained.
Accordingly, the apparatus 700 further comprises:
and the second width determining module is used for determining the width of a second signal according to the target pulse number and the third frequency when the target control signal is received.
And the second signal generation module is used for generating a second driving signal according to the second frequency and the second signal width.
It should be noted that, for the information interaction, execution process, and other contents between the above-mentioned devices/units, the specific functions and technical effects thereof are based on the same concept as those of the method embodiment of the present application, and specific reference may be made to a part of the method embodiment, which is not described herein again.
EXAMPLE III
Fig. 8 is a schematic diagram of a laser provided in the third embodiment of the present application. As shown in fig. 8, the laser 800 of this embodiment includes: a processor 801, a memory 802, and a computer program 803 stored in the memory 802 and operable on the processor 801. The steps in the various method embodiments described above are implemented when the processor 801 described above executes the computer program 803 described above. Alternatively, the processor 801 implements the functions of the modules/units in the device embodiments when executing the computer program 803.
Illustratively, the computer program 803 may be divided into one or more modules/units, which are stored in the memory 802 and executed by the processor 801 to complete the present application. The one or more modules/units may be a series of computer program instruction segments capable of performing specific functions, which are used to describe the execution of the computer program 803 in the laser 800. For example, the computer program 803 may be divided into a signal acquisition module, a first modulation module, a signal amplification module, and a second modulation module, and the specific functions of each module are as follows:
acquiring a first driving signal and a second driving signal, wherein the first driving signal comprises a plurality of first trigger signals, the second driving signal comprises a plurality of second trigger signals, and the first frequency of the first trigger signals is higher than the second frequency of the second trigger signals;
driving a first modulator to modulate the seed optical signal according to the first driving signal to obtain a modulated laser signal;
inputting the modulated laser signal into an amplifier to obtain an amplified laser signal;
And driving a second modulator to modulate the amplified laser signal according to the second driving signal to obtain a target laser signal.
The laser may include, but is not limited to, a processor 801 and a memory 802. Those skilled in the art will appreciate that fig. 8 is merely an example of a laser 800 and does not constitute a limitation of laser 800 and may include more or fewer components than shown, or some components may be combined, or different components, e.g., the laser may also include input-output devices, network access devices, buses, etc.
The Processor 801 may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, discrete hardware card, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The memory 802 may be an internal storage unit of the laser 800, such as a hard disk or a memory of the laser 800. The memory 802 may also be an external storage device of the laser 800, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), etc. provided on the laser 800. Further, the memory 802 may include both an internal memory unit and an external memory device of the laser 800. The memory 802 is used to store the computer programs and other programs and data required by the laser. The memory 802 may also be used to temporarily store data that has been output or is to be output.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned functions may be distributed as different functional units and modules according to needs, that is, the internal structure of the apparatus may be divided into different functional units or modules to implement all or part of the above-mentioned functions. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working processes of the units and modules in the system may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus/laser and method may be implemented in other ways. For example, the above-described apparatus/laser embodiments are merely illustrative, and for example, the division of the above modules or units is only one logical division, and there may be other divisions in actual implementation, for example, multiple units or plug-ins may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated modules/units described above, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium. Based on such understanding, all or part of the processes in the above method embodiments may be implemented by a computer program, which may be stored in a computer readable storage medium and executed by a processor, so as to implement the steps of the above method embodiments. The computer program includes computer program code, and the computer program code may be in a source code form, an object code form, an executable file or some intermediate form. The computer readable medium may include: any entity or device capable of carrying the above-mentioned computer program code, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signal, telecommunication signal, software distribution medium, etc. It should be noted that the computer readable medium described above may include content that is subject to appropriate increase or decrease as required by legislation and patent practice in jurisdictions, for example, in some jurisdictions, computer readable media that does not include electrical carrier signals and telecommunications signals in accordance with legislation and patent practice.
The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present application, and they should be construed as being included in the present application.
Claims (9)
1. A method for controlling a laser signal, comprising:
acquiring a first driving signal and a second driving signal, wherein the first driving signal comprises a plurality of first trigger signals, the second driving signal comprises a plurality of second trigger signals, and the first frequency of the first trigger signals is higher than the second frequency of the second trigger signals;
driving a first modulator to modulate the seed optical signal according to the first driving signal to obtain a modulated laser signal;
inputting the modulated laser signal into an amplifier to obtain an amplified laser signal;
driving a second modulator to modulate the amplified laser signal according to the second driving signal to obtain a target laser signal;
Wherein, said driving a second modulator to modulate the amplified laser signal according to the second driving signal to obtain a target laser signal comprises:
and driving the second modulator to modulate the amplified laser signal according to the second frequency of the second trigger signal and the second signal width of the second trigger signal to obtain a target laser signal.
2. The method for controlling a laser signal according to claim 1, wherein the driving a first modulator according to the first driving signal to modulate the seed optical signal to obtain a modulated laser signal comprises:
and driving the first modulator to modulate the seed optical signal according to the first frequency of the first trigger signal and the first signal width of the first trigger signal to obtain a modulated optical signal.
3. The method according to claim 2, wherein before driving the first modulator to modulate the seed optical signal according to the first frequency of the first trigger signal and the first signal width of the first trigger signal to obtain the modulated optical signal, the method further comprises:
acquiring the number of target sub-pulses, the first frequency and the third frequency of the seed optical signal;
When a target control signal is received, determining a first signal width according to the target sub-pulse number and the third frequency;
generating the first drive signal according to the first frequency and the first signal width.
4. The method for controlling a laser signal according to claim 1, wherein the driving a first modulator according to the first driving signal to modulate the seed optical signal to obtain a modulated laser signal comprises:
when the first trigger signal is detected, driving the first modulator and identifying a rising edge of a seed optical signal passing through the first debugger;
and when the number of the rising edges is equal to the target pulse count, turning off the first modulator.
5. The method for controlling a laser signal according to claim 1, wherein before driving the second modulator to modulate the amplified laser signal according to the second frequency of the second trigger signal and the second signal width of the second trigger signal to obtain the target laser signal, the method comprises:
acquiring the number of target pulses, the second frequency and the third frequency of the seed optical signal;
when a target control signal is received, determining the width of the second signal according to the target pulse number and the third frequency;
And generating the second driving signal according to the second frequency and the second signal width.
6. A control apparatus for a laser signal, comprising:
the signal acquisition module is used for acquiring a first driving signal and a second driving signal, wherein the first driving signal comprises a plurality of first trigger signals, the second driving signal comprises a plurality of second trigger signals, and the first frequency of the first trigger signals is higher than the second frequency of the second trigger signals;
the first modulation module is used for driving a first modulator to modulate the seed optical signal according to the first driving signal to obtain a modulated laser signal;
the signal amplification module is used for inputting the modulated laser signal into an amplifier to obtain an amplified laser signal;
the second modulation module is used for driving a second modulator to modulate the amplified laser signal according to the second driving signal to obtain a target laser signal;
the second modulation module is specifically configured to perform: and driving a second modulator to modulate the amplified laser signal according to the second frequency of the second trigger signal and the second signal width of the second trigger signal to obtain the target laser signal.
7. The apparatus for controlling laser signal according to claim 6, wherein the first modulation module is specifically configured to perform:
and driving the first modulator to modulate the seed optical signal according to the first frequency of the first trigger signal and the first signal width of the first trigger signal to obtain a modulated optical signal.
8. A laser comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the processor implements the method according to any of claims 1-5 when executing the computer program.
9. A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the method according to any one of claims 1-5.
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| CN101354515B (en) * | 2008-09-05 | 2012-04-04 | 中兴通讯股份有限公司 | Method and device for control bias of laser modulator |
| CN105140762B (en) * | 2015-07-30 | 2018-12-07 | 深圳市欧凌镭射科技有限公司 | A kind of pulse optical fiber of semiconductor laser seed source |
| CN107968311B (en) * | 2017-12-21 | 2019-10-29 | 山东大学 | A kind of MOPA pulse optical fiber and its working method |
| CN110265861B (en) * | 2019-06-20 | 2020-07-07 | 北京盛镭科技有限公司 | Method and system for controlling laser pulse output |
| CN112490840A (en) * | 2020-11-26 | 2021-03-12 | 浙江热刺激光技术有限公司 | System and method for inhibiting continuous components in laser pulse traveling wave amplification process |
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