CN106505405A - A kind of picosecond laser single pulse-selecting and control system and method - Google Patents
A kind of picosecond laser single pulse-selecting and control system and method Download PDFInfo
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- CN106505405A CN106505405A CN201610969406.XA CN201610969406A CN106505405A CN 106505405 A CN106505405 A CN 106505405A CN 201610969406 A CN201610969406 A CN 201610969406A CN 106505405 A CN106505405 A CN 106505405A
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- 238000000034 method Methods 0.000 title claims abstract description 14
- 230000001629 suppression Effects 0.000 claims abstract description 24
- 230000003287 optical effect Effects 0.000 claims abstract description 20
- 238000012216 screening Methods 0.000 claims abstract description 3
- 238000004088 simulation Methods 0.000 claims description 7
- 230000005611 electricity Effects 0.000 claims description 6
- 230000003321 amplification Effects 0.000 claims description 5
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 5
- 230000001360 synchronised effect Effects 0.000 claims description 5
- 210000001367 artery Anatomy 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 3
- 230000000630 rising effect Effects 0.000 claims description 3
- 210000003462 vein Anatomy 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 description 5
- 238000005086 pumping Methods 0.000 description 3
- 230000001172 regenerating effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- 238000009795 derivation Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
Classifications
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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
- H01S3/13—Stabilisation of laser output parameters, e.g. frequency or amplitude
- H01S3/131—Stabilisation of laser output parameters, e.g. frequency or amplitude by controlling the active medium, e.g. by controlling the processes or apparatus for excitation
-
- 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
- H01S3/13—Stabilisation of laser output parameters, e.g. frequency or amplitude
- H01S3/131—Stabilisation of laser output parameters, e.g. frequency or amplitude by controlling the active medium, e.g. by controlling the processes or apparatus for excitation
- H01S3/1317—Stabilisation of laser output parameters, e.g. frequency or amplitude by controlling the active medium, e.g. by controlling the processes or apparatus for excitation by controlling the temperature
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
- Semiconductor Lasers (AREA)
Abstract
The present invention relates to a kind of picosecond laser single pulse-selecting and control system and method, it is characterised in that including control circuit, optics menu device, main optical clock；The control circuit and main optical clock connect optics menu device respectively；The main optical clock is used for sending Base clock laser pulse signal, the optics menu device is used for screening basic laser pulse all the time, and the laser pulse train of optional frequency is selected, the control circuit is used for the first pulse suppression effect for adjusting control train of pulse.The train of pulse (frequency range is adjustable from 0.156Hz to 1MHz) of optional frequency can be selected from laser pulse of the repetition rate for 50MHz；The first pulse suppression effect of train of pulse can be adjusted by software；Burst pulse functions are realized, and Burst impulse waveforms can software design patterns adjustment.
Description
Technical field
The present invention relates to laser technology field, in particular, is to be related to a kind of picosecond laser single pulse-selecting and control
System and method processed.
Background technology
The high power high repetition frequency that pulse energy is tens μ J (micro- Jiao), repetition rate is hundreds of kHz (KHz)
Picosecond laser can meet the retrofit demand to many materials, can be widely used in cut, engraving, line and beat
The fields such as mark.Picosecond laser process technology has become the study hotspot of field of laser processing, the trend of the Fashion of Future Laser Processing.
The single pulse energy directly produced due to agitator is only in nJ (receive Jiao) magnitude, it is impossible to meet Laser Processing demand.Prior art
Regenerative amplifier by active switch control laser pulse signal injection and derivation, while to regenerate chamber loss adjust
System.The course of work mainly includes pumping, repeatedly amplifies and cavity dumping output three phases.In the pumping stage, due to regenerating at chamber
In high loss state, without laser generation, the gain media in chamber obtains lasting pumping in regeneration chamber, and population inversion, energy are stored up
It is stored in gain media.When amplification stage starts, the low energy signal pulse exported by agitator imports regenerative amplification chamber, signal
Energy is extracted in regeneration intracavity multipass gain media after injection, chamber cavity dumping is regenerated after optimum pulse energy is obtained defeated
The picopulse gone out after amplifying.
Existing picosecond laser single pulse-selecting control technology Shortcomings or can't be realized in following technology：1st, may be used
To realize selecting the train of pulse of optional frequency in laser pulse from repetition rate as 50MHz, (frequency range is from 0.156Hz
Adjustable to 1MHz)；2nd, the first pulse suppression effect of train of pulse can be adjusted by software；3rd, Burst pulse function is realized, and
Burst impulse waveforms can software design patterns adjustment.
Content of the invention
In view of this, it is necessary to for the problems referred to above, there is provided a kind of picosecond laser single pulse-selecting and control system and
Method, it is possible to achieve the first pulse suppression function of laser pulse train output, and pass through software design patterns, it is possible to achieve different head
Pulse suppression effect is controlled.
To achieve these goals, technical scheme is as follows：
A kind of picosecond laser single pulse-selecting and control system, during including control circuit, optics menu device, main optical
Clock；The control circuit and main optical clock connect optics menu device respectively；When the main optical clock is used for sending basis
Clock laser pulse signal, the optics menu device are used for screening Base clock laser pulse signal, and select arbitrarily
The laser pulse train of frequency, the control circuit are used for the first pulse suppression effect for adjusting control train of pulse.
Used as preferred, the control circuit includes that FPGA and DPS, the DPS are used for controlling management function, the FPGA
For logical-sequential control.
As preferred, the control circuit using trigger and gate-control signal as input control signal, control
Signal exports the digital quantity menu signal of single or fixed frequency with Base clock laser pulse signal by FPGA, while
The starting point of the rising edge of each gate-control signal or a string of triggers produces simulation menu signal, by digital menu signal and mould
Intend menu signal control optics menu device.
As preferred, also include laser power amplifier, the laser power amplifier connects optics menu device, use
Power amplification is carried out in the laser pulse train sent by optics menu device.
Used as preferred, the control circuit also includes sequence circuit, CPU, real-time clock, Compact Flash, also includes I/O
Interface and RS232 interfaces.
Used as preferred, the control circuit is also associated with laser diode drive and temperature control panel.
One kind carries out picosecond laser single pulse-selecting and control method according to said system, comprises the following steps：
S1, the train of pulse in the laser pulse of repetition rate, choosing optional frequency；
S2, the first pulse suppression effect of adjustment train of pulse；
S3, setting adjustment Burst impulse waveforms.
Used as preferred, step S1 is specifically included：
If choosing internal control mode to work, FPGA produces the frequency that user sets, by the logical-sequential control electricity in FPGA
Main optical clock is sent Base clock laser pulse signal menu out by road, used as the control signal of optics menu device；
If choosing external control mode work, by trigger or the gate-control signal of user input optional frequency, by FPGA
Logic control circuit by main optical clock signal menu out；When trigger is input into, the signal of selection and trigger
Synchronous, when input gate-control signal, the signal during high level of selection gate-control signal selects single-signal frequency to be arranged by DSP.
Used as preferred, step S2 is specifically included：
If choosing internal control mode to work, laser instrument is not required to first pulse suppression function in light state is grown；
If choose external control mode work, by user input optional frequency trigger when, in each trigger pulse string
Starting point produces the analog control signal of first pulse suppression, and the interval of each trigger signal pulse string is more than 50us, simulation control letter
Number amplitude controlled by DSP, analog control signal is carried in optics menu device for adjusting the effect of first pulse suppression.
Used as preferred, step S3 is specifically included：
S31, client's input gate-control signal；
S32, DSP arrange the pulse number included by Burst trains of pulse；
S33, main optical clock produce Base clock laser pulse signal, gate-control signal, Burst trains of pulse, Base clock
Laser pulse signal produces optics menu control signal by logical sequence circuit in FPGA, and DSP synchronously produces Burst pulses
The menu control signal of string, by arranging the pulse number that Burst trains of pulse include, the frequency of train of pulse, the width of analogue signal
Value, produces different optics menu control signals, optics menu control signal is carried on optics menu device, can be chosen
Go out Burst trains of pulse and control the waveform of its train of pulse.
Compared with prior art, the beneficial effects of the present invention is：
1st, each the laser arteries and veins required for this circuit can be accurately selected in the up to laser pulse train of 50MHz
Punching；
2nd, by arranging circuit parameter, it is possible to achieve up to 100 kinds different Burst laser pulse trains；
3rd, the first pulse suppression function of laser pulse train output can be realized, and passes through software design patterns, it is possible to achieve no
Same first pulse suppression effect control；
4th, arranged by software parameter, it is possible to achieve synchronous clock clocks needed for picosecond laser menu are internal control
System or external control；
5th, the input of Transistor-Transistor Logic level one can be passed through, change software design patterns this inputs is trig input signals or for gate inputs
Signal.
Description of the drawings
Fig. 1 is control circuit menu and Burst functional schematic in the embodiment of the present invention
Fig. 2 is control circuit control block diagram in the embodiment of the present invention；
Fig. 3 is control logic sequential chart in step S1 in the embodiment of the present invention；
Fig. 4 is control logic sequential chart in step S2 in the embodiment of the present invention；
Fig. 5 is control logic sequential chart in step S3 in the embodiment of the present invention.
Specific embodiment
With reference to the accompanying drawings and examples to a kind of picosecond laser single pulse-selecting of the present invention and control system
It is described further with method.
The preferred example of a kind of picosecond laser single pulse-selecting of the present invention and control system and method is the following is,
Therefore protection scope of the present invention is not limited.
A kind of picosecond laser single pulse-selecting and control system is figures 1 and 2 show that, is selected including control circuit 7, optics
Single device 3, main optical clock 1；The control circuit 7 and main optical clock 1 connect optics menu device 3 respectively；The key light
Class hour, clock 1 was used for sending Base clock laser pulse signal 2, and the optics menu device 3 is used for Base clock laser pulse
Signal 2 is screened, and selects the laser pulse train 4 of optional frequency, and the control circuit 7 is used for adjusting control train of pulse 4
First pulse suppression effect.
Used as preferred, the control circuit 7 includes that FPGA and DPS, the DPS are used for controlling management function, described
FPGA is used for logical-sequential control.
Used as preferred, the control circuit 7 is using triggering (Trig) signal and gate (Gate) signal as input
Control signal, control signal export the digital quantity choosing of single or fixed frequency with Base clock laser pulse signal 2 by FPGA
Mono signal, while simulation menu signal is produced in the rising edge of each gate-control signal or the starting point of a string of triggers, by number
Word menu signal and simulation menu signal control optics menu device.
As preferred, also include that laser power amplifier 5, the laser power amplifier 5 connect optics menu device
3, the laser pulse train 4 for sending to optics menu device 3 carries out power amplification.
Used as preferred, the control circuit 7 also includes sequence circuit, CPU, real-time clock (RTC), Compact Flash (CF
Storage card), also include I/O interfaces and RS232 interfaces.
Used as preferred, the control circuit 7 is also associated with laser diode drive (Laser Diode Driver)
With temperature control panel (Temperature Control Board).
Fig. 3 shows that one kind carries out picosecond laser single pulse-selecting and control method according to said system, including following step
Suddenly：
S1, the train of pulse in the laser pulse of repetition rate, choosing optional frequency；
S2, the first pulse suppression effect of adjustment train of pulse；
S3, setting adjustment Burst impulse waveforms.
As preferred, it is to realize, in the laser pulse from repetition rate for 50MHz, selecting the train of pulse of optional frequency
(frequency range is adjustable from 0.156Hz to 1MHz), as shown in figure 3, control circuit 7 adopts following logic control in step S1
Sequential：
If choosing internal control mode to work, FPGA produces the frequency that user sets, by the logical-sequential control electricity in FPGA
Main optical clock 1 is sent 2 menu of Base clock laser pulse signal out by road, used as the control signal of optics menu device 3；
If choosing external control mode work, by trigger or the gate-control signal of user input optional frequency, by FPGA
Logic control circuit by 1 menu of main optical clock signal out；When trigger is input into, the signal of selection and trigger
Synchronous, when input gate-control signal, the signal during high level of selection gate-control signal selects single-signal frequency to be arranged by DSP.
As shown in figure 4, used as preferably, step S2 is specifically included：
If choosing internal control mode to work, laser instrument is not required to first pulse suppression function in light state is grown；
If choose external control mode work, by user input optional frequency trigger when, in each trigger pulse string
Starting point produces the analog control signal of first pulse suppression, and the interval of each trigger signal pulse string is more than 50us, simulation control letter
Number amplitude controlled by DSP, analog control signal is carried in optics menu device 3 for adjusting the effect of first pulse suppression.
As shown in figure 5, used as preferably, step S3 is specifically included：
S31, client's input gate-control signal；
S32, DSP arrange the pulse number included by Burst trains of pulse；
S33, main optical clock 1 produce Base clock laser pulse signal 2, when gate-control signal, Burst trains of pulse, basis
Clock laser pulse signal 2 produces optics menu control signal by logical sequence circuit in FPGA, and DSP synchronously produces Burst
The menu control signal of train of pulse, by arranging the pulse number that Burst trains of pulse include, the frequency of train of pulse, analogue signal
Amplitude, produce different optics menu control signals, optics menu control signal be carried on optics menu device 3, can
To select the waveform that Burst trains of pulse disease controls its train of pulse.
Compared with prior art, the beneficial effects of the present invention is：
1st, each the laser arteries and veins required for this circuit can be accurately selected in the up to laser pulse train of 50MHz
Punching；
2nd, by arranging circuit parameter, it is possible to achieve up to 100 kinds different Burst laser pulse trains；
3rd, the first pulse suppression function of laser pulse train output can be realized, and passes through software design patterns, it is possible to achieve no
Same first pulse suppression effect control；
4th, arranged by software parameter, it is possible to achieve synchronous clock clocks needed for picosecond laser menu are internal control
System or external control；
5th, the input of Transistor-Transistor Logic level one can be passed through, change software design patterns this inputs is trig input signals or for gate inputs
Signal.
Embodiment described above only expresses the several embodiments of the present invention, and its description is more concrete and detailed, but simultaneously
Therefore the restriction to the scope of the claims of the present invention can not be interpreted as.It should be pointed out that for one of ordinary skill in the art
For, without departing from the inventive concept of the premise, some deformations and improvement can also be made, these belong to the guarantor of the present invention
Shield scope.Therefore, the protection domain of patent of the present invention should be defined by claims.
Claims (10)
1. a kind of picosecond laser single pulse-selecting and control system, it is characterised in that fill including control circuit, optics menu
Put, main optical clock；The control circuit and main optical clock connect optics menu device respectively；The main optical clock is used for
Base clock laser pulse signal is sent, the optics menu device is used for screening basic laser pulse signal all the time,
And the laser pulse train of optional frequency is selected, the control circuit is used for the first pulse suppression effect for adjusting control train of pulse.
2. picosecond laser single pulse-selecting according to claim 1 and control system, it is characterised in that the control electricity
Road includes that FPGA and DPS, the DPS are used for controlling management function, and the FPGA is used for logical-sequential control.
3. picosecond laser single pulse-selecting according to claim 2 and control system, it is characterised in that the control electricity
Using trigger and gate-control signal as the control signal being input into, control signal is passed through with Base clock laser pulse signal on road
FPGA, exports the digital quantity menu signal of single or fixed frequency, while rising edge or a string of the triggerings in each gate-control signal
The starting point of signal produces simulation menu signal, controls optics menu device by digital menu signal and simulation menu signal.
4. picosecond laser single pulse-selecting according to claim 1 and control system, it is characterised in that also include laser
Power amplifier, the laser power amplifier connect optics menu device, for the laser arteries and veins sent by optics menu device
Rushing string carries out power amplification.
5. picosecond laser single pulse-selecting according to claim 1 and control system, it is characterised in that the control electricity
Road also includes sequence circuit, CPU, real-time clock, Compact Flash, also includes I/O interfaces and RS232 interfaces.
6. picosecond laser single pulse-selecting according to claim 1 and control system, it is characterised in that the control electricity
Road is also associated with laser diode drive and temperature control panel.
7. one kind carries out picosecond laser single pulse-selecting and control method according to the arbitrary system of claim 1 to 6, its feature
It is, comprises the following steps：
S1, the train of pulse in the laser pulse of repetition rate, choosing optional frequency；
S2, the first pulse suppression effect of adjustment train of pulse；
S3, setting adjustment Burst impulse waveforms.
8. picosecond laser single pulse-selecting according to claim 6 and control method, it is characterised in that the step S1 tool
Body includes：
If choosing internal control mode to work, FPGA produces the frequency that user sets, will by the logical-sequential control circuit in FPGA
Main optical clock sends Base clock laser pulse signal menu out, used as the control signal of optics menu device；
If choosing external control mode work, by trigger or the gate-control signal of user input optional frequency, by patrolling in FPGA
Volume control circuit by main optical clock signal menu out；When trigger is input into, the signal of selection is synchronous with trigger,
When input gate-control signal, the signal during high level of selection gate-control signal selects single-signal frequency to be arranged by DSP.
9. picosecond laser single pulse-selecting according to claim 6 and control method, it is characterised in that the step S2 tool
Body includes：
If choosing internal control mode to work, laser instrument is not required to first pulse suppression function in light state is grown；
If choose external control mode work, by user input optional frequency trigger when, in the starting point of each trigger pulse string
The analog control signal of first pulse suppression is produced, the interval of each trigger signal pulse string is more than 50us, analog control signal
Amplitude is controlled by DSP, and analog control signal is carried in the effect that optics menu device is used for adjusting first pulse suppression.
10. picosecond laser single pulse-selecting according to claim 6 and control method, it is characterised in that step S3
Specifically include：
S31, client's input gate-control signal；
S32, DSP arrange the pulse number included by Burst trains of pulse；
S33, main optical clock produce Base clock laser pulse signal, gate-control signal, Burst trains of pulse, Base clock laser
Pulse signal produces optics menu control signal by logical sequence circuit in FPGA, and DSP synchronously produces Burst trains of pulse
Menu control signal, by arranging the pulse number that Burst trains of pulse include, the frequency of train of pulse, the amplitude of analogue signal are produced
The different optics menu control signal of life, optics menu control signal is carried on optics menu device, can be selected
Burst trains of pulse simultaneously control the waveform of its train of pulse.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610969406.XA CN106505405B (en) | 2016-10-27 | 2016-10-27 | A kind of picosecond laser single pulse-selecting and control system and method |
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| CN201610969406.XA CN106505405B (en) | 2016-10-27 | 2016-10-27 | A kind of picosecond laser single pulse-selecting and control system and method |
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| CN106505405B CN106505405B (en) | 2017-10-31 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107069411A (en) * | 2017-03-30 | 2017-08-18 | 武汉华日精密激光股份有限公司 | High-energy Ps Laser Pulse POD control systems and method |
| CN108227595A (en) * | 2018-03-02 | 2018-06-29 | 武汉华工激光工程有限责任公司 | Laser pulse synchronisation control means and system |
| CN109449741A (en) * | 2018-12-29 | 2019-03-08 | 大族激光科技产业集团股份有限公司 | Laser energy attenuation system and method |
| CN110265860A (en) * | 2019-05-29 | 2019-09-20 | 长春新产业光电技术有限公司 | A kind of derivative menu laser for realizing that repetition rate is continuously adjustable of external trigger signal |
| CN110474227A (en) * | 2019-08-16 | 2019-11-19 | 清华大学 | A kind of short-pulse laser system and control method based on Burst mode |
| CN111525385A (en) * | 2020-07-02 | 2020-08-11 | 武汉华锐超快光纤激光技术有限公司 | High-precision pulse POD control method and circuit of femtosecond fiber laser |
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| CN107069411A (en) * | 2017-03-30 | 2017-08-18 | 武汉华日精密激光股份有限公司 | High-energy Ps Laser Pulse POD control systems and method |
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| CN109449741A (en) * | 2018-12-29 | 2019-03-08 | 大族激光科技产业集团股份有限公司 | Laser energy attenuation system and method |
| CN109449741B (en) * | 2018-12-29 | 2020-10-13 | 深圳市大族数控科技有限公司 | Laser energy control system and method |
| CN110265860A (en) * | 2019-05-29 | 2019-09-20 | 长春新产业光电技术有限公司 | A kind of derivative menu laser for realizing that repetition rate is continuously adjustable of external trigger signal |
| CN110474227A (en) * | 2019-08-16 | 2019-11-19 | 清华大学 | A kind of short-pulse laser system and control method based on Burst mode |
| CN111525385A (en) * | 2020-07-02 | 2020-08-11 | 武汉华锐超快光纤激光技术有限公司 | High-precision pulse POD control method and circuit of femtosecond fiber laser |
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| CN106505405B (en) | 2017-10-31 |
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