CN116780314A - Precise regulation and control device and method for high-contrast laser pulse waveform - Google Patents
Precise regulation and control device and method for high-contrast laser pulse waveform Download PDFInfo
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Abstract
The application relates to a precise regulation and control device and a precise regulation and control method for a high-contrast laser pulse waveform, which belong to the technical field of laser equipment, wherein a continuous wave seed source, an amplitude modulator and a beam splitter are sequentially arranged along the transmission direction of a laser signal, the continuous wave seed source emits continuous wave laser, the continuous wave laser is modulated by the amplitude modulator to generate pulse laser, the pulse laser is split into a main beam and a sampling beam by the beam splitter, a photoelectric detector, a power divider, an oscilloscope and a processor are sequentially arranged on a transmission light path of the sampling beam, the output end of the power divider is respectively connected with a main channel and a secondary channel of the oscilloscope, and the amplitude gears of the main channel and the secondary channel are different.
Description
Technical Field
The application belongs to the technical field of laser equipment, and particularly relates to a precise regulation and control device and a regulation and control method for a high-contrast laser pulse waveform.
Background
The high-power laser can play an irreplaceable role in the fields of inertia constraint fusion, high-energy density physics, celestial body physics and other leading edge science and technology under extreme object state conditions such as strong electric field, strong magnetic field, high pressure and the like which are not available before laboratory environment creation. The precise physical experiment requires precise regulation and control of parameters such as time domain, space domain, spectral domain and the like of high-power laser. In the time domain, the high power laser device needs to output high contrast laser shaping pulses with precisely controllable time domain morphology to improve beam-target coupling efficiency. The contrast of the laser shaped pulse is a very important parameter, especially in the interaction of super-intense laser pulses with the micro-target pellet. Depending on the fusion physical requirements, the laser device needs to output a precisely shaped laser pulse of sufficiently high contrast (> 100:1).
Although ultra-high contrast shaped laser pulses (Zong Zhaoyu, xu Dangpeng, tian Xiaocheng, et al, research on high precision shaped laser pulse generation techniques) can be generated by using cascaded amplitude modulators, china laser, 2017,44 (1): 0105001.), precision physics experiments require shaped laser pulses with a specific temporal profile, not just high contrast, and therefore, a closed loop modulation method is further needed to precisely shape the laser pulses. The intense laser and particle beam, 2022, 34 (3): 1-7;Brunton G,Erbert G,Browning D,Tse E.The shaping of a national ignition campaign pulsed waveform.Fusion Engineering and Design,2012,87 (12): 1940-1944.) can precisely regulate the laser pulse waveform, but cannot achieve precise regulation of high contrast laser pulse waveform, the ratio of the peak area of the pulse waveform to the foot area (low amplitude area, also called the foot area) is greater than 100, because the linear dynamic range of data acquisition systems such as oscilloscopes is generally 30: about 1, accurate measurement of a waveform foot pulse area cannot be realized, and therefore accurate regulation and control of a high-contrast pulse waveform cannot be realized.
Disclosure of Invention
Aiming at various defects in the prior art, in order to solve the problems, a precise regulation and control device and a precise regulation and control method for a high-contrast laser pulse waveform are provided.
In order to achieve the above purpose, the present application provides the following technical solutions:
in a first aspect, the present application provides a precise control device for a high-contrast laser pulse waveform, which is sequentially provided with a continuous wave seed source, an amplitude modulator and a beam splitter along a laser signal transmission direction, wherein the continuous wave seed source emits continuous wave laser, the continuous wave laser is subjected to amplitude modulation by the amplitude modulator to generate a pulse laser with a specific time domain shape, and the pulse laser is split by the beam splitter to form a main beam and a sampling beam;
the photoelectric detector, the power divider, the oscilloscope and the processor are sequentially arranged on a transmission light path of the sampling light beam, the input end of the power divider is connected with the photoelectric detector, the output end of the power divider is respectively connected with a main channel and an auxiliary channel of the oscilloscope, the amplitude gears of the main channel and the auxiliary channel are different, and the processor is respectively connected with the oscilloscope in a communication mode.
The technical scheme is further characterized in that the amplitude modulator is connected with an electric pulse generator through a radio frequency wire, and the electric pulse generator is in communication connection with the processor.
The technical scheme is further that the beam splitting ratio of the beam splitter is 99:1, the sampling light beam is transmitted to the photoelectric detector through an attenuator.
The technical scheme is further characterized in that the sampling bandwidth of the photoelectric detector, the power divider and the oscilloscope is larger than the highest modulation frequency of the pulse laser.
The technical scheme is further characterized in that gear settings of a main channel and a secondary channel of the oscilloscope are adjusted, the main channel obtains and displays the waveform full view of the pulse laser, and the secondary channel obtains and displays a waveform low-amplitude region of the pulse laser.
In a second aspect, the present application provides a precise control method for high-contrast laser pulse waveform, comprising the following steps:
s100, setting a target waveform, an iteration evaluation standard and an effective splicing bit number, and inverting the emergent frequency pulse waveform according to the target waveform and the electro-optic amplitude response curve;
s300, loading a radio frequency pulse waveform by an amplitude modulator, modulating continuous wave laser emitted by a continuous wave seed source into pulse laser, dividing part of light beams into sampling light beams by a beam splitter, acquiring and displaying the waveform overall view of the pulse laser by a main channel of an oscilloscope, acquiring and displaying a waveform low-amplitude region of the pulse laser by a sub-channel of the oscilloscope, and splicing and synthesizing waveforms acquired by the main channel and the sub-channel to obtain a spliced and synthesized waveform;
s500, comparing and analyzing the difference between the spliced synthesized waveform and the target waveform, and if the difference meets the iterative evaluation standard, indicating that waveform regulation is completed; and otherwise, correcting the radio frequency pulse waveform according to the difference, and repeating S300 to S500 until the difference meets the iterative evaluation standard.
In the technical scheme, in S100, the number of the splicing bits is determined according to the waveform length and the shape characteristics of the pulse laser and the resolution of the oscilloscope.
In the step S300, the method further comprises the steps of splicing and synthesizing waveforms acquired by the main channel and the auxiliary channel to obtain a spliced and synthesized waveform, and the method comprises the following steps:
s301, aligning waveforms acquired by a main channel and a secondary channel according to a unified time reference;
s303, determining the splicing proportion according to the waveform data of the corresponding positions of the main channel and the auxiliary channel within the effective splicing bit range, and splicing and synthesizing waveforms acquired by the main channel and the auxiliary channel according to the splicing proportion.
In the present technical solution, in S301, the method for determining the time reference is further set as follows:
when the amplitude modulator loads the radio frequency pulse waveform, a point response radio frequency pulse is added at a fixed time length from the trailing edge of the radio frequency pulse waveform, and the fixed position of the point response radio frequency pulse attached to the rear of the radio frequency pulse waveform is used as a time reference.
In the technical scheme, in S303, the method for determining the splicing proportion is as follows:
determining the maximum value of the waveform obtained by the auxiliary channel within the effective splicing bit range, respectively taking 2 adjacent data points at two sides of the maximum value, finding out waveform data corresponding to the maximum value and the positions of the data points on the waveform obtained by the main channel, dividing the waveform data at the positions corresponding to the main channel and the auxiliary channel, and taking the average value as the splicing proportion.
The beneficial effects of the application are as follows:
1. the precise regulation and control of the high-contrast laser pulse can be realized by utilizing the power divider and 2 channels of the oscilloscope, and the device has the advantages of simple structure and low cost.
2. The waveform full view and the low-amplitude region of the pulse laser are respectively measured by adopting 2 channels of an oscilloscope, the waveforms of the main channel and the auxiliary channel are spliced and synthesized to improve the measurement dynamic range, and then the waveforms are subjected to closed-loop regulation and control based on a difference iterative feedback algorithm, so that the precise regulation and control of the high-contrast laser pulse waveforms are realized.
3. And a point response radio frequency pulse is added at a fixed position behind the radio frequency pulse waveform and is used as a time reference, so that the waveform confidence of splicing and synthesizing is improved, and the waveform regulation and control precision is high.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a high contrast laser pulse waveform fine tuning device according to an exemplary embodiment;
FIG. 2 is a flow chart illustrating a method of fine tuning a high contrast laser pulse waveform according to an exemplary embodiment;
FIG. 3 (a) is a schematic diagram of a main channel acquisition waveform of an oscilloscope;
FIG. 3 (b) is a schematic diagram of a secondary channel acquisition waveform of an oscilloscope;
FIG. 4 (a) is a graph showing a comparison of a stitched synthesized waveform with a target waveform;
FIG. 4 (b) is a low amplitude region waveform contrast plot of a stitched synthesized waveform versus a target waveform;
FIG. 4 (c) is a graph showing the difference between the spliced composite waveform and the target waveform at each time point;
fig. 5 is a flow chart illustrating a method of fine tuning a high contrast laser pulse waveform according to another exemplary embodiment.
In the accompanying drawings: a 1-continuous wave seed source, a 2-amplitude modulator, a 3-electric pulse generator, a 4-transmission amplifying link, a 5-beam splitter, a 6-photoelectric detector, a 7-power splitter, an 8-oscilloscope and a 9-processor;
in fig. 3 (a) and 3 (b), the abscissa indicates time in nanoseconds and the ordinate indicates normalized intensity.
Detailed Description
In order to make the technical solution of the present application better understood by those skilled in the art, the technical solution of the present application will be clearly and completely described in the following with reference to the accompanying drawings, and based on the embodiments of the present application, other similar embodiments obtained by those skilled in the art without making any inventive effort should be included in the scope of protection of the present application. In addition, directional words such as "upper", "lower", "left", "right", and the like, as used in the following embodiments are merely directions with reference to the drawings, and thus, the directional words used are intended to illustrate, not to limit, the application.
Embodiment one:
as shown in fig. 1, a high-contrast laser pulse waveform precise regulation device is provided with a continuous wave seed source 1, an amplitude modulator 2, a transmission amplifying link 4 and a beam splitter 5 in sequence along the transmission direction of a laser signal.
Wherein the continuous wave seed source 1 is used for emitting continuous wave laser light. The amplitude modulator 2 performs amplitude modulation on the continuous wave laser by loading a radio frequency pulse waveform to generate a pulse laser with a specific time domain shape. The transmission amplifying link 4 is composed of an optical fiber and a spatial light path, and is configured to transmit the pulse laser light to the beam splitter 5 and amplify the pulse laser light. The beam splitter 5 is capable of transmitting a substantial portion of the laser energy for further backward transmission, reflecting a small portion of the laser energy for sampling measurements, i.e. the pulsed laser beam is split by the beam splitter 5 into a main beam and a sampling beam.
The photoelectric detector 6, the power divider 7, the oscilloscope 8 and the processor 9 are sequentially arranged on a transmission light path of the sampling light beam, the input end of the power divider 7 is connected with the photoelectric detector 6, the output end of the power divider 7 is respectively connected with a main channel and a secondary channel of the oscilloscope 8, the amplitude gears of the main channel and the secondary channel are different, and the processor 9 is respectively connected with the oscilloscope 8 and the amplitude modulator 2 in a communication manner.
Specifically, the sampling beam is converted into an electrical signal by the photodetector 6, the electrical signal is split into 2 beams by the power splitter 7, 1 beam of electrical signal enters the main channel of the oscilloscope 8, and the other 1 beam of electrical signal enters the auxiliary channel of the oscilloscope 8. The processor 9 is configured to perform denoising, filtering, splicing and synthesizing on the waveforms acquired by the main channel and the auxiliary channel, compare the difference between the spliced and synthesized waveform and the target waveform, correct the rf pulse waveform according to the waveform comparison difference, and finally load the corrected rf pulse waveform onto the amplitude modulator 2.
It is worth to say that the precise control of the high contrast laser pulse can be realized by using 2 channels of the power divider 7 and the oscilloscope 8, and the structure is simple and the cost is low.
Further, the amplitude modulator 2 is connected to an electric pulse generator 3 via a radio frequency line, the electric pulse generator 3 being communicatively connected to the processor 9.
Specifically, the electric pulse generator 3 is used to generate a radio frequency pulse waveform and load the radio frequency pulse waveform to the amplitude modulator 2.
Preferably, the amplitude modulator 2 is a mach zehnder amplitude modulator, has high extinction ratio, and can regulate and control generation of high-contrast laser pulse waveforms superior to 1000:1. The electric pulse generator 3 may output a radio frequency signal within 1V.
Further, the beam splitter 5 has a splitting ratio of 99:1, the sampling beam is transmitted to the photodetector 6 via an attenuator.
Further, the sampling bandwidth of the photodetector 6, the power divider 7, and the oscilloscope 8 is greater than the highest modulation frequency of the pulsed laser.
For example, the highest modulation frequency of the pulsed laser is 2.5GHz, and a photoelectric detector 6, a power divider 7 and an oscilloscope 8 with bandwidths larger than 7.5GHz are adopted to ensure measurement confidence.
Further, the gear setting of the oscilloscope 8 is adjusted, the main channel obtains and displays the waveform overview of the pulse laser, and the auxiliary channel obtains and displays the waveform low-amplitude region of the pulse laser.
Embodiment two:
as shown in fig. 1 and 2, a precise regulation method for high-contrast laser pulse waveform includes the following steps:
s100, setting a target waveform, an iteration evaluation standard and an effective splicing bit number, and inverting the emergent frequency pulse waveform according to the target waveform and the electro-optic amplitude response curve.
Firstly, the response relation between the amplitude of the radio frequency pulse waveform sent by the electric pulse generator 3 and the amplitude of the laser pulse waveform at the position to be measured is marked to obtain a normalized electrooptical amplitude response curve; and inverting the corresponding emergent frequency pulse waveform by the target waveform according to the normalized electro-optic amplitude response curve. That is, the electro-optic amplitude response curve substantially reflects the relationship of the rf electrical signal to the laser pulse signal, and the outgoing frequency pulse waveform may be inverted according to the electro-optic amplitude response curve.
Further, the number of splice bits is determined according to the waveform length and shape characteristics of the pulse laser and the resolution of the oscilloscope 8.
For example, with an oscilloscope 8 with a time resolution of 25ps, the total acquisition point corresponding to the pulse laser waveform with a pulse width of 21.8ns is 872, the front 15ns of the waveform mainly exists in the low-amplitude region in the Hann pulse (the Hann pulse shape is shown in fig. 3 (a)), and the acquisition point corresponding to 15ns of the oscilloscope 8 is 600, so 600 is taken as the effective splicing bit number. That is, the effective splicing bit number is selected by grasping the characteristics of the pulse laser waveform and fully utilizing the measuring dynamic range of the low-amplitude area of the extended waveform of the auxiliary channel of the oscilloscope 8.
S300, loading a radio frequency pulse waveform by the amplitude modulator 2, modulating continuous wave laser emitted by the continuous wave seed source 1 into pulse laser, dividing part of light beams by the beam splitter 5 to serve as sampling light beams, acquiring and displaying the waveform overall view of the pulse laser by a main channel of the oscilloscope 8, acquiring and displaying a waveform low-amplitude region of the pulse laser by a secondary channel of the oscilloscope 8, and splicing and synthesizing waveforms acquired by the main channel and the secondary channel to obtain a spliced and synthesized waveform.
Specifically, the electric pulse generator 3 loads a radio frequency pulse waveform, the amplitude modulator 2 modulates continuous wave laser into laser pulses, the laser pulses are transmitted to the optical splitter 5 through the transmission amplifying link 4, and part of laser energy is split by the optical splitter 5 for sampling and measurement. The photodetector 6 collects the pulse laser waveform, and divides the photoelectrically converted electric signal into 2 beams by the power divider 7. The 2 channels of the oscilloscope 8 respectively read and display waveforms of the pulse laser, and gear setting of the oscilloscope 8 is adjusted to enable the main channel to display the waveform full view of the pulse laser, and the auxiliary channel to display a low-amplitude region of the waveform of the pulse laser.
In addition, the base noise of the oscilloscope 8 needs to be removed before the waveform of the main channel and the waveform of the auxiliary channel are spliced, and a certain degree of filtering processing is performed according to the highest frequency of laser modulation.
Further, the splicing and synthesizing the waveforms acquired by the main channel and the auxiliary channel to obtain a spliced and synthesized waveform comprises the following steps:
s301, aligning waveforms acquired by a main channel and a secondary channel according to a unified time reference.
Specifically, the method for determining the time reference comprises the following steps:
when the amplitude modulator 2 loads the radio frequency pulse waveform, a point response radio frequency pulse is added at a fixed time length from the rear edge of the radio frequency pulse waveform, the point response radio frequency pulse does not participate in the waveform regulation and control process, only the fixed position attached to the rear of the radio frequency pulse waveform is used as a time reference, the waveform confidence of splicing and synthesizing is improved, and the waveform regulation and control precision is high. The point-response rf pulses behind the waveforms can be seen in the waveform data shown in fig. 3 (a), 3 (b), and 4 (a).
S303, determining the splicing proportion according to the waveform data of the corresponding positions of the main channel and the auxiliary channel within the effective splicing bit range, and splicing and synthesizing waveforms acquired by the main channel and the auxiliary channel according to the splicing proportion.
Specifically, the method for determining the splicing proportion comprises the following steps:
comparing all the numerical values in the effective splicing bit range, determining the maximum value of the waveform obtained by the auxiliary channel, respectively taking 2 adjacent data points at two sides of the maximum value, finding out waveform data corresponding to the maximum value and the positions of the data points on the waveform obtained by the main channel, dividing the waveform data at the positions corresponding to the main channel and the auxiliary channel, and taking the average value as the splicing proportion.
For example, the maximum position is T m Then take T m-1 、T m-2 、T m+1 、T m+2 Finding a sum T on the main channel acquisition waveform m-1 、T m-2 、Tm、T m+1 、T m+2 Corresponding waveform data. That is, the sub-channel waveform within the effective splice number of bits is spliced to the main channel waveform to increase the measured dynamic range of the low amplitude region of the waveform.
The secondary channel measures the waveform using a smaller voltage step, the high amplitude waveform data rushes out of the oscilloscope screen, and the low amplitude waveform data occupies the oscilloscope screen, as shown in fig. 3 (b). The auxiliary channel has high measurement accuracy and high confidence coefficient on a low-amplitude region of the waveform data. When the waveform is spliced and synthesized, the low-amplitude region adopts the waveform data of the auxiliary channel, and the main channel data and the auxiliary channel data are spliced to improve the measurement dynamic range of the whole waveform.
S500, comparing and analyzing the difference between the spliced synthesized waveform and the target waveform, and if the difference meets the iterative evaluation standard, indicating that waveform regulation is completed; and otherwise, correcting the radio frequency pulse waveform according to the difference, and repeating S300 to S500 until the difference meets the iterative evaluation standard.
Specifically, at a specific time sequence point, when the amplitude of the spliced composite waveform is greater than the amplitude of the target waveform, the amplitude of the radio frequency pulse on the time sequence needs to be reduced; when the amplitude of the spliced composite waveform is less than the amplitude of the target waveform, then the RF pulse amplitude over the time sequence needs to be increased. Comparing the points on all time sequences on the waveform one by one, and summarizing the radio frequency pulse waveform on the whole time sequence.
As can be seen from fig. 4 (a) to fig. 4 (c), the trailing edge of the spliced composite waveform has a point response pulse, the curve of the target waveform is very smooth, the deviation between the high-contrast laser waveform generated by regulation and control and the target waveform is very small, the RMS is less than 3%, and the requirement of high-contrast precise regulation and control is met.
That is, the sampling beam is divided into 2 beams, the waveform full view and the low-amplitude region of the pulse laser are respectively measured by adopting 2 channels of the oscilloscope 8, the waveforms of the main channel and the auxiliary channel are spliced and synthesized to improve the measurement dynamic range, and then the waveforms are subjected to closed-loop regulation and control based on a difference iterative feedback algorithm, so that the precise regulation and control of the high-contrast laser pulse waveform is realized.
Embodiment III:
as shown in fig. 5, a precise control method for a high-contrast laser pulse waveform includes the following steps:
s201, setting a target waveform, an iteration evaluation standard and an effective splicing bit number;
s202, inverting the emergent frequency pulse waveform according to the target waveform and the electro-optic amplitude response curve;
s203, loading a radio frequency pulse waveform by an electric pulse generator;
s204, collecting pulse laser waveforms by a photoelectric detector, and dividing an electric signal into 2 beams by a power divider;
s205, acquiring pulse laser waveforms by an oscilloscope in a double-channel mode;
s206, denoising, filtering, aligning and splicing synthesis processing are carried out on the acquired waveforms of the main channel and the auxiliary channel;
s207, comparing and analyzing the difference between the spliced synthesized waveform and the target waveform, judging whether the evaluation standard is met, and if yes, finishing regulation;
s208, if not, correcting the radio frequency pulse waveform according to the waveform comparison difference.
The foregoing detailed description of the application has been presented for purposes of illustration and description, but is not intended to limit the scope of the application, i.e., the application is not limited to the details shown and described.
Claims (10)
1. The precise regulation and control device for the high-contrast laser pulse waveform is characterized in that a continuous wave seed source, an amplitude modulator and a beam splitter are sequentially arranged along the transmission direction of a laser signal, the continuous wave seed source emits continuous wave laser, the continuous wave laser is subjected to amplitude modulation through the amplitude modulator to generate pulse laser with a specific time domain shape, and the pulse laser is split into a main beam and a sampling beam through the beam splitter;
the photoelectric detector, the power divider, the oscilloscope and the processor are sequentially arranged on a transmission light path of the sampling light beam, the input end of the power divider is connected with the photoelectric detector, the output end of the power divider is respectively connected with a main channel and an auxiliary channel of the oscilloscope, the amplitude gears of the main channel and the auxiliary channel are different, and the processor is respectively connected with the oscilloscope in a communication mode.
2. The precise control device for high-contrast laser pulse waveforms according to claim 1, wherein the amplitude modulator is connected with an electric pulse generator through a radio frequency line, and the electric pulse generator is in communication connection with the processor.
3. The precise control device for high-contrast laser pulse waveforms according to claim 1, wherein the beam splitter has a beam splitting ratio of 99:1, the sampling light beam is transmitted to the photoelectric detector through an attenuator.
4. A high contrast laser pulse waveform precision control apparatus according to any one of claims 1-3, wherein the sampling bandwidth of the photodetector, the power divider and the oscilloscope is greater than the highest modulation frequency of the pulsed laser.
5. The precise regulating device for the pulse waveform of the high-contrast laser according to claim 4, wherein gear settings of a main channel and a secondary channel of the oscilloscope are regulated, the main channel acquires and displays the waveform overview of the pulse laser, and the secondary channel acquires and displays a waveform low-amplitude region of the pulse laser.
6. A regulation method using the high contrast laser pulse waveform precision regulation device according to any one of claims 1 to 5, characterized by comprising the steps of:
s100, setting a target waveform, an iteration evaluation standard and an effective splicing bit number, and inverting the emergent frequency pulse waveform according to the target waveform and the electro-optic amplitude response curve;
s300, loading a radio frequency pulse waveform by an amplitude modulator, modulating continuous wave laser emitted by a continuous wave seed source into pulse laser, dividing part of light beams into sampling light beams by a beam splitter, acquiring and displaying the waveform overall view of the pulse laser by a main channel of an oscilloscope, acquiring and displaying a waveform low-amplitude region of the pulse laser by a sub-channel of the oscilloscope, and splicing and synthesizing waveforms acquired by the main channel and the sub-channel to obtain a spliced and synthesized waveform;
s500, comparing and analyzing the difference between the spliced synthesized waveform and the target waveform, and if the difference meets the iterative evaluation standard, indicating that waveform regulation is completed; and otherwise, correcting the radio frequency pulse waveform according to the difference, and repeating S300 to S500 until the difference meets the iterative evaluation standard.
7. The precise control method of high contrast laser pulse waveform according to claim 6, wherein in S100, the number of splice bits is determined according to the waveform length, shape characteristics and resolution of the oscilloscope.
8. The precise control method of high-contrast laser pulse waveforms according to claim 6, wherein in S300, the waveforms obtained by the main channel and the auxiliary channel are spliced and synthesized to obtain a spliced and synthesized waveform, and the method comprises the following steps:
s301, aligning waveforms acquired by a main channel and a secondary channel according to a unified time reference;
s303, determining the splicing proportion according to the waveform data of the corresponding positions of the main channel and the auxiliary channel within the effective splicing bit range, and splicing and synthesizing waveforms acquired by the main channel and the auxiliary channel according to the splicing proportion.
9. The precise control method of high-contrast laser pulse waveform according to claim 8, wherein in S301, the determining method of the time reference is as follows:
when the amplitude modulator loads the radio frequency pulse waveform, a point response radio frequency pulse is added at a fixed time length from the trailing edge of the radio frequency pulse waveform, and the fixed position of the point response radio frequency pulse attached to the rear of the radio frequency pulse waveform is used as a time reference.
10. The precise control method of high-contrast laser pulse waveform according to claim 8, wherein in S303, the determining method of the splicing ratio is as follows:
determining the maximum value of the waveform obtained by the auxiliary channel within the effective splicing bit range, respectively taking 2 adjacent data points at two sides of the maximum value, finding out waveform data corresponding to the maximum value and the positions of the data points on the waveform obtained by the main channel, dividing the waveform data at the positions corresponding to the main channel and the auxiliary channel, and taking the average value as the splicing proportion.
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| CN117200831A (en) * | 2023-11-03 | 2023-12-08 | 上海安其威微电子科技有限公司 | Contactless connector and contactless connector system |
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| CN117200831A (en) * | 2023-11-03 | 2023-12-08 | 上海安其威微电子科技有限公司 | Contactless connector and contactless connector system |
| CN117200831B (en) * | 2023-11-03 | 2024-01-23 | 上海安其威微电子科技有限公司 | Contactless connector and contactless connector system |
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