CN112531451A - Laser time domain synchronous control system - Google Patents
Laser time domain synchronous control system Download PDFInfo
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- CN112531451A CN112531451A CN202011201677.3A CN202011201677A CN112531451A CN 112531451 A CN112531451 A CN 112531451A CN 202011201677 A CN202011201677 A CN 202011201677A CN 112531451 A CN112531451 A CN 112531451A
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- 230000001360 synchronised effect Effects 0.000 title claims abstract description 49
- 230000003321 amplification Effects 0.000 claims abstract description 21
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 21
- 239000000284 extract Substances 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000001934 delay Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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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
- H01S3/10007—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating in optical amplifiers
- H01S3/10015—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating in optical amplifiers by monitoring or controlling, e.g. attenuating, the input signal
-
- 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
-
- 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 invention discloses a laser time domain synchronous control system which comprises a laser amplification system, a control circuit and a synchronous delay circuit, wherein the control circuit is connected with the laser amplification system, the synchronous delay circuit is connected with the control circuit, the synchronous delay circuit calculates and compares the working periods of a seed source, a first modulator, an amplifier and a second modulator through the control circuit, outputs a synchronous control signal to the control circuit, and controls the pulse synchronous output of the seed source, the first modulator, the amplifier and the second modulator in the laser amplification system. The invention extracts all driving and control signals which need to be accurately synchronized, calculates and outputs synchronous control signals to each control circuit through the synchronous delay circuit, and accurately controls each modulator and amplifier to synchronously output pulses.
Description
Technical Field
The invention relates to the technical field of lasers, in particular to a laser time domain synchronous control system.
Background
Conventional high-energy ultrafast laser systems typically employ multi-stage pulse amplifiers to amplify high frequency low pulse energy seed sources to higher energies. In the process, seed source pulses (1-10) are selected and output through a first-stage high-frequency acousto-optic modulator (AOM1), then multi-stage amplification is carried out, and finally output pulses and output power are selected through a second-stage acousto-optic modulator (AOM 2). In this process, the laser is always in full power operation. With the inconsistency of the operation speed and the consistency of the processing effect of the processing object, the laser pulse output needs to be accurately synchronized and the change of the movement speed needs to be matched, and the traditional method for synchronizing the devices is as follows: an analog electronic module is used to control the amplifier switches (Pockels cells). The switches and the amplifying lasers are synchronized, while the seed source operates in a free running mode.
Although the above synchronization method has been adequate for many applications, it is not adequate when high precision measurements are required. Due to the mismatch between the repetition frequencies of the seed source and the amplifying laser, the synchronization of the amplifying system also varies with this mismatch. The upper limit of the total system synchronization uncertainty is 12.5ns for an 80MHz seed oscillator. To overcome this limit, it is necessary that each device of the amplifier system must be synchronized.
Disclosure of Invention
In view of the above technical problems, the present invention provides a laser time domain synchronization control system, which implements the synchronization of an amplifier and a modulator.
The invention provides a laser time domain synchronous control system, which comprises a laser amplification system, a control circuit and a synchronous delay circuit, wherein the laser amplification system comprises a seed source, a first modulator, an amplifier and a second modulator which are sequentially connected, the seed source is used for generating a pulse laser signal and inputting the pulse laser signal into the first modulator for frequency reduction, the pulse laser signal subjected to frequency reduction is input into the amplifier for amplification, the amplified laser pulse signal is input into the second modulator for modulation, so that the laser pulse signal with preset energy size and times is output, the control circuit is respectively connected with the laser amplification system and the synchronous delay circuit, the synchronous delay circuit calculates and compares the working periods of the seed source, the first modulator, the amplifier and the second modulator through the control circuit, outputs a synchronous control signal to the control circuit, and controls the seed source, the amplifier and the second modulator to output the synchronous control signal to the control circuit, The pulses of the first modulator, the amplifier and the second modulator are output synchronously.
Optionally, the control circuit further includes a driving module for driving the first modulator, the amplifier and the second modulator to operate.
Optionally, the amplifier comprises a first amplifier and a second amplifier connected in series.
Optionally, the control circuit includes a first control circuit, a second control circuit, a third control circuit and a fourth control circuit, the first control circuit is connected to the seed source and is configured to drive output of current, pulse energy and frequency in the seed source, the second control circuit is connected to the first modulator and is configured to reduce the frequency of the pulsed laser signal, the third control circuit is connected to the amplifier and is configured to drive the amplifier to operate, and the fourth control circuit is connected to the second regulator and is configured to control the output frequency and output power of the pulsed laser signal.
Optionally, the first control circuit is further configured to receive a pulsed laser signal generated by the seed source and feed back a synchronization control signal to the seed source.
Optionally, the second control circuit is further configured to feed back the synchronization control signal to the first modulator.
Optionally, the fourth control circuit is further configured to feed back the synchronization control signal to the second modulator.
Optionally, the duty cycle of the seed source is 10-33 ns.
Optionally, the duty cycle of the first modulator is 20-100ns, and the duty cycle of the second modulator is 1000-10000 ns.
The invention provides a laser time domain synchronous control system, which comprises a laser amplification system, a control circuit and a synchronous delay circuit, wherein the control circuit is respectively connected with the laser amplification system and the synchronous delay circuit, the synchronous delay circuit calculates and compares the working cycles of a seed source, a first modulator, an amplifier and a second modulator in the laser amplification system through the control circuit, outputs a synchronous control signal to the control circuit, controls the synchronous output of the seed source, the first modulator, the amplifier and the second modulator, extracts all driving and control signals needing accurate synchronization, calculates and outputs the synchronous control signal to each control circuit through the synchronous delay circuit, and accurately controls each modulator and the amplifier to synchronously output pulses.
Drawings
FIG. 1 is a schematic structural diagram of a laser time domain synchronization control system according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another embodiment of a laser time domain synchronization control system according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a laser time domain synchronous control system, please refer to fig. 1, the system includes a laser amplification system 100, a control circuit 200 and a synchronous delay circuit 300, the laser amplification system 100 includes a seed source 110, a first modulator 120, an amplifier 130 and a second modulator 140 which are connected in sequence, the seed source 110 is used for generating a pulse laser signal and inputting the pulse laser signal into the first modulator 120 for frequency reduction, the pulse laser signal after frequency reduction is input into the amplifier 130 for amplification, the amplified laser pulse signal is input into the second modulator 140 for modulation, so that the laser pulse signal with preset energy and times is output, the control circuit 200 is connected with the laser amplification system 100, the synchronous delay circuit 300 is connected with the control circuit 200, the synchronous delay circuit 300 calculates and compares the seed source 110, the first modulator 120, the duty cycle of the amplifier 130 and the second modulator 140 outputs a synchronous control signal to the control circuit 200, which controls the pulse synchronous output of the seed source 110, the first modulator 120, the amplifier 130 and the second modulator 140.
The invention extracts all driving and control signals which need to be accurately synchronized, calculates and outputs synchronous control signals to each control circuit through the synchronous delay circuit, and accurately controls each modulator and amplifier to synchronously output pulses.
In one embodiment of the present invention, the control circuit 200 further includes a driving module for driving the first modulator 120, the amplifier 130 and the second modulator 140 to operate.
In one embodiment of the present invention, the amplifier 130 includes a first amplifier 131 and a second amplifier 132 connected in sequence. The control circuit 200 comprises a first control circuit 210, a second control circuit 220, a third control circuit 230 and a fourth control circuit 240, wherein the first control circuit 210 is connected to the seed source 110 for driving the output of the current, the pulse energy and the frequency in the seed source 110, the second control circuit 220 is connected to the first modulator 120 for reducing the frequency of the pulsed laser signal, the third control circuit 230 is connected to the amplifier 130 for driving the amplifier 130 to operate, and the fourth control circuit 240 is connected to the second regulator 140 for controlling the output frequency and the output power of the pulsed laser signal.
Referring to fig. 2, the laser amplification system 100 includes a seed source 110, a first modulator 120, a first amplifier 131, a second amplifier 132, and a second modulator 140, which are connected in sequence, where the seed source 110 is configured to generate a pulse laser signal, and input the pulse laser signal to the first modulator 120 for frequency reduction, the frequency-reduced pulse laser signal is input to the amplifier 130 for amplification, the amplified laser pulse signal is input to the second modulator 140 for modulation, so that the amplified laser pulse signal outputs a laser pulse signal with a preset energy size and frequency, where a first control circuit 210 is connected to the seed source 110 and is configured to drive output of current, pulse energy, and frequency in the seed source 110, the first control circuit 210 is further configured to receive the pulse laser signal generated by the seed source 110 and feed back a synchronization control signal to the seed source 110, and a second control circuit 220 is connected to the first modulator 120 for reducing the frequency of the pulse laser signal, the second control circuit 220 is further configured to feed back a synchronization control signal to the first modulator 120, the third control circuit 230 is respectively connected to the first amplifier 131 and the second amplifier 132 and configured to drive the first amplifier 131 and the second amplifier 132 to operate, the fourth control circuit 240 is connected to the second regulator 140 and configured to control the output frequency and the output power of the pulsed laser signal, and the fourth control circuit 240 is further configured to feed back the synchronization control signal to the second modulator 140.
In one embodiment of the present invention, the seed source 110 may provide a high frequency, low energy, fixed pulse width and fixed period laser pulse signal, for example, with a typical frequency of 30-100Mhz and a single pulse energy of 0.1-1 nj. The pulse laser signal provided by the seed source 110 is down-converted by the first modulator 120 to output a pulse laser signal, and the pulse laser signal is amplified 1000 to 10 ten thousand times by the first amplifier 131 and the second amplifier 132, and then the output energy and the output frequency are controlled by the second modulator 140.
The first control circuit 210 of the present invention is configured to receive the pulsed laser signal generated by the seed source 110 and drive the output of the current, the pulse energy and the frequency in the seed source 110, and at the same time, the first control circuit 210 feeds back the synchronization control signal transmitted by the receiving synchronization delay circuit 300 to the seed source 110 and feeds back the pulse that has been output.
The second control circuit 220 of the present invention is used for controlling and driving the first modulator 120, and controlling the frequency of the pulsed laser signal in the first modulator 120 to decrease, and the second control circuit 220 is further used for feeding back the synchronous control signal output by the synchronous delay circuit 300 to the first modulator 120, and adjusting the output frequency of the first modulator 120.
The third control circuit 230 of the present invention includes a driving module for driving the first amplifier 131 and the second amplifier 132 to operate, and supplying constant energy to the first amplifier 131 and the second amplifier 132 to ensure that the first amplifier 131 and the second amplifier 132 operate stably.
The fourth control circuit 240 is configured to feed back the synchronization control signal output by the synchronization delay circuit 300 to the second regulator 140, and control the output interval and the output power of the pulsed laser signal.
In the invention, the duty cycle of the seed source 110 is 10-33ns, the duty cycle of the first modulator 120 is 20-100ns, and the duty cycle of the second regulator 140 is 1000-10000n, so that different event delays are brought by huge duty cycle differences. In order to solve the delay problem, the synchronous delay circuit 300 of the present invention calculates the time of the next pulse output by reading the pulse output feedback of the first control circuit 210, the second control circuit 220, the third control circuit 230 and the fourth control circuit 240, compares the duty cycles of the first control circuit 210, the second control circuit 220, the third control circuit 230 and the fourth control circuit 240, latches the signals and simultaneously outputs the synchronous control signals to the respective control circuits, and the respective control circuits control the first modulator 120, the second modulator 140, the first amplifier 131 and the second amplifier 132 to synchronously output the pulses through the synchronous control signals.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will 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; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (9)
1. The laser time domain synchronous control system is characterized by comprising a laser amplification system, a control circuit and a synchronous delay circuit, wherein the laser amplification system comprises a seed source, a first modulator, an amplifier and a second modulator which are sequentially connected, the seed source is used for generating a pulse laser signal and inputting the pulse laser signal into the first modulator for frequency reduction, the pulse laser signal subjected to frequency reduction is input into the amplifier for amplification, the amplified laser pulse signal is input into the second modulator for modulation, so that the second modulator outputs a laser pulse signal with preset energy and times, the control circuit is respectively connected with the laser amplification system and the synchronous delay circuit, the synchronous delay circuit calculates and compares the working periods of the seed source, the first modulator, the amplifier and the second modulator through the control circuit, outputs a synchronous control signal to the control circuit, and controls the seed source, The pulses of the first modulator, the amplifier and the second modulator are output synchronously.
2. The laser time domain synchronization control system of claim 1, wherein the control circuit further comprises a driving module for driving the first modulator, the amplifier and the second modulator to operate.
3. The laser time domain synchronization control system of claim 1, wherein the amplifier comprises a first amplifier and a second amplifier connected in series.
4. The laser time domain synchronous control system of claim 1, wherein the control circuit comprises a first control circuit, a second control circuit, a third control circuit and a fourth control circuit, the first control circuit is connected to the seed source for driving the output of current, pulse energy and frequency in the seed source; the second control circuit is connected with the first modulator and used for reducing the frequency of the pulse laser signal; the third control circuit is connected with the amplifier and used for driving the amplifier to work; the fourth control circuit is connected with the second regulator and is used for controlling the output frequency and the output power of the pulse laser signal.
5. The laser time domain synchronization control system of claim 4, wherein the first control circuit is further configured to receive a pulsed laser signal generated by a seed source and feed back a synchronization control signal to the seed source.
6. The laser time domain synchronization control system of claim 4, wherein the second control circuit is further configured to feed back a synchronization control signal to the first modulator.
7. The laser time domain synchronization control system of claim 4, wherein the fourth control circuit is further configured to feed back a synchronization control signal to the second modulator.
8. The laser time domain synchronization control system of claim 1, wherein the seed source duty cycle is 10-33 ns.
9. The system as claimed in claim 1, wherein the duty cycle of the first modulator is 20-100ns, and the duty cycle of the second modulator is 1000-10000 ns.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011201677.3A CN112531451A (en) | 2020-11-02 | 2020-11-02 | Laser time domain synchronous control system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011201677.3A CN112531451A (en) | 2020-11-02 | 2020-11-02 | Laser time domain synchronous control system |
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| CN112531451A true CN112531451A (en) | 2021-03-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113140953A (en) * | 2021-03-31 | 2021-07-20 | 深圳市欧凌镭射科技有限公司 | Laser signal control method and device, laser and readable storage medium |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060159138A1 (en) * | 2004-12-21 | 2006-07-20 | Institut National D'optique | Pulsed laser light source |
| CN102263356A (en) * | 2011-06-03 | 2011-11-30 | 中国科学院上海光学精密机械研究所 | Single-frequency narrow line width polarization maintaining full-optical fiber pulse laser device |
| CN103633541A (en) * | 2013-12-09 | 2014-03-12 | 北京信息科技大学 | FPGA (field programmable gate array) based pulse fiber laser power control system |
| US20150180197A1 (en) * | 2012-06-12 | 2015-06-25 | Photon Energy Gmbh | Short Pulse Laser With Amplifier And Adjustable Pulse Sequence |
| CN109038199A (en) * | 2018-10-19 | 2018-12-18 | 安徽华生机电设备有限公司 | A kind of pulsed laser and its pulse power control application method |
| CN110265861A (en) * | 2019-06-20 | 2019-09-20 | 北京盛镭科技有限公司 | Control the method and system of pulsed laser output |
-
2020
- 2020-11-02 CN CN202011201677.3A patent/CN112531451A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060159138A1 (en) * | 2004-12-21 | 2006-07-20 | Institut National D'optique | Pulsed laser light source |
| CN102263356A (en) * | 2011-06-03 | 2011-11-30 | 中国科学院上海光学精密机械研究所 | Single-frequency narrow line width polarization maintaining full-optical fiber pulse laser device |
| US20150180197A1 (en) * | 2012-06-12 | 2015-06-25 | Photon Energy Gmbh | Short Pulse Laser With Amplifier And Adjustable Pulse Sequence |
| CN103633541A (en) * | 2013-12-09 | 2014-03-12 | 北京信息科技大学 | FPGA (field programmable gate array) based pulse fiber laser power control system |
| CN109038199A (en) * | 2018-10-19 | 2018-12-18 | 安徽华生机电设备有限公司 | A kind of pulsed laser and its pulse power control application method |
| CN110265861A (en) * | 2019-06-20 | 2019-09-20 | 北京盛镭科技有限公司 | Control the method and system of pulsed laser output |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113140953A (en) * | 2021-03-31 | 2021-07-20 | 深圳市欧凌镭射科技有限公司 | Laser signal control method and device, laser and readable storage medium |
| CN113140953B (en) * | 2021-03-31 | 2022-06-28 | 深圳市欧凌镭射科技有限公司 | Laser signal control method and device, laser and readable storage medium |
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