CN101599611A - The electronic synchronous sequential control system that is used for femto-second laser amplifying device - Google Patents
The electronic synchronous sequential control system that is used for femto-second laser amplifying device Download PDFInfo
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- CN101599611A CN101599611A CNA2008101145869A CN200810114586A CN101599611A CN 101599611 A CN101599611 A CN 101599611A CN A2008101145869 A CNA2008101145869 A CN A2008101145869A CN 200810114586 A CN200810114586 A CN 200810114586A CN 101599611 A CN101599611 A CN 101599611A
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Abstract
The present invention discloses a kind of electronic synchronous sequential control system that is used for femto-second laser amplifying device, comprising: a square wave signal generator is used to produce total clock control signal; A photodetector is used to receive the locked mode signal of seed laser; Four delayers are used to produce the signal of different sequential, are respectively first delayer, second delayer, the 3rd delayer and multichannel delayer; A frequency multiplier is used to produce the signal of upper frequency; Pounce on the Kerr cell sync driver for two, be respectively first and pounce on the Kerr cell sync driver, be used to control one and pounce on Kerr cell and carry out laser pulse menu and turned letter; Second pounces on the Kerr cell sync driver, is used to control another and pounces on Kerr cell and carry out the laser pulse menu.The present invention mainly also is applicable to the different situation of pulse repetition frequency of the used laser of pumping source of each amplifying stage in the amplifying device except being applicable to the related laser amplification device type of prior art, have the bigger scope of application.
Description
Technical field
The present invention relates to the synchronous sequencing control technical field of electronics, particularly relate to high-precision electronic synchronous sequential control system required in the terawatt (TW) level femto-second laser amplifying device
Background technology
The femtosecond ultra-intense laser is one of research contents of laser technology and physics forefront over past ten years, because the sustained and rapid development of this research field, people can obtain 10 in the laboratory at present
22W/cm
2The distribution of light intensity of magnitude.Under the effect of this superhigh intensity light field, material will show unprecedented extreme nonlinear effect, and cause many brand-new physical phenomenons and physical problem, thereby the academic thought that obtains innovation for people provides the important advanced research platform.At present, this femtosecond ultra-intense laser platform has not only become one of important tool of the new rule of people's knowledge of natural environment science, also promoting simultaneously many new subjects, as the formation and the fast development of subjects such as table top nuclear physics, laboratory astrophysics, ultrafast x-ray laser, fast ignition laser fusion, be to have one of basic scientific research problem of breakthrough meaning most over past ten years.
Terawatt (TW) level femtosecond laser amplification system based on the chirped pulse amplification principle is the topmost device that present laboratory obtains the femtosecond ultra-intense laser, this device is except requiring to possess the high-accuracy optical system components, also require to possess high-accuracy electric-control system, because desire realizes laser and amplifies, seed light and pump light must be synchronously, also must be synchronously between the amplifying units at different levels, the while seed light, also specific sequential need be arranged between pump light and the amplifying unit at different levels, all these must be finished by high-precision electronic control system, the performance of electric-control system will directly determine the success or not of whole laser pulse amplifying device, and its precision is also directly being controlled the big or small and stable of the final pulse energy of exporting.Therefore, electronic synchronous sequential control system is extremely important for terawatt (TW) level femto-second laser amplifying device, and it is valuable pursuing high-precision like this electric-control system.
The required electronic synchronous sequential control system of the femto-second laser amplifying device of different structure also has very big difference.The pulse repetition frequency of the used laser of pumping source of each amplifying stage is identical in the now common terawatt (TW) level femto-second laser amplifying device, or even the laser of same type, the required electric-control system of this type of femto-second laser amplifying device is simple relatively, the commercial femto-second laser amplifying device of Spectra-Physics for example, the used pumping source of its amplifications at different levels all is YAG (yttrium-aluminium-garnet) lasers of identical pulse repetition rate, and its electronic synchronous sequential control system is only by a square wave signal generator, delayer about one 200 μ s and two pounce on the Kerr cell sync driver and form.Current, because some special requirement, the pulse repetition frequency of each amplifying stage pumping source laser is different in some terawatt (TW) level femto-second laser amplifying devices, or even dissimilar laser, the required electric-control system of this type of femto-second laser amplifying device is many with regard to relative complex, for example, the used pumping source of elementary amplification is that the output pulse repetition frequency is the laser by the continuous pumping of semiconductor of 1kHz, and the used pumping source of the amplifying stage of back is a pulse repetition frequency is the YAG laser of 10Hz, the required electronic synchronous sequential control system of this femto-second laser amplifying device is exactly an electric-control system involved in the present invention, have not yet to see the product of the required electric-control system of femto-second laser amplifying device of this type, the present invention is at the terawatt (TW) level femto-second laser amplifying device of this type and design.
Summary of the invention
Problem at the prior art existence, the purpose of this invention is to provide a kind of used pumping source of each amplifying stage that can be used for and export the identical femto-second laser amplifying device of pulse repetition frequency, can be used for the electronic synchronous sequential control system of the used pumping source output pulse repetition frequency of the elementary amplification femto-second laser amplifying device different again with the amplifying stage of back.
For achieving the above object, the invention provides a kind of electronic synchronous sequential control system that is used for femto-second laser amplifying device, comprising:
A square wave signal generator is used to produce total clock control signal;
A photodetector is used to receive the locked mode signal of seed laser;
Four delayers are used to produce the signal of different sequential, are respectively first delayer, second delayer, the 3rd delayer and multichannel delayer;
A frequency multiplier is used to produce the signal of upper frequency, and the frequency multiplication principle of described frequency multiplier is that the mode that the rising edge by input signal regularly triggers segment switch realizes that input signal arrives the frequency multiplication process of output signal;
Pounce on the Kerr cell sync driver for two, be respectively first and pounce on the Kerr cell sync driver, be used to control one and pounce on Kerr cell and carry out laser pulse menu and turned letter; Second pounces on the Kerr cell sync driver, is used to control another and pounces on Kerr cell and carry out the laser pulse menu.
Further:
The signal of described square wave signal generator output is divided into three the tunnel, the first via is imported first delayer, the xenon lamp switch triggering input of the YAG laser in the second tunnel input femto-second laser amplifying device, the xenon lamp switch triggering input of the 2nd YAG laser in the Third Road input femto-second laser amplifying device;
The signal of described first delayer output is divided into two-way, and the first via is imported described frequency multiplier, and the second the tunnel imports described second delayer;
The signal of described second delayer output is imported the described second external trigger input of pouncing on the Kerr cell sync driver;
Described frequency multiplier comprises external control pulse signal generator, pulse signal synthesizer, the input of described external control pulse signal generator is connected with the first input end of described pulse signal synthesizer, the output of described external control pulse signal generator is connected with second input of described pulse signal synthesizer, the signal of described frequency multiplier output is divided into two-way, the Q switching of the kHz laser of the LD pumping in the first via input femto-second laser amplifying device triggers input, and the second the tunnel imports described the 3rd delayer;
The signal of described the 3rd delayer output is imported the described first external trigger input of pouncing on the Kerr cell sync driver;
Described first signal of pouncing on the first time-delay output output of Kerr cell sync driver is imported the menu triggering input that first in the femto-second laser amplifying device pounced on Kerr cell, and the turned letter triggering input of Kerr cell is pounced in the signal input first of the second time-delay output output;
The signal of described photodetector output is divided into two-way, and the first via is imported the described second RF input of pouncing on the Kerr cell sync driver, and the second the tunnel imports the described first RF input of pouncing on the Kerr cell sync driver;
Described second signal of pouncing on the time-delay output output of Kerr cell sync driver is imported the menu triggering input that second in the femto-second laser amplifying device pounced on Kerr cell, and the signal of synchronous output end output is imported the external trigger input of described multichannel delayer;
The Q switching of the 2nd YAG laser in the signal input femto-second laser amplifying device of the first time-delay output output of described multichannel delayer triggers input, and the Q switching of the YAG laser in the signal input femto-second laser amplifying device of the second time-delay output output triggers input.
Further:
The frequency of the signal of described square wave signal generator output is 10Hz;
Described photodetector adopts PIN photodiode, is the fast-response photodiode, and its peak wavelength to the light wave response is 760nm;
Described first delayer is that 180 μ s～240 μ s time-delay is adjustable continuously;
Described second delayer and the 3rd delayer are that 2 μ s～4 μ s time-delay is adjustable continuously;
Each road time-delay output of described multichannel delayer all is that 0～2 μ s time-delay is adjustable continuously with respect to input signal;
The incoming frequency of described frequency multiplier is 10Hz, and output frequency is 1kHz;
Described first pounces on Kerr cell sync driver and second pounces on 70MHz～80MHz locked mode electric impulse signal that the RF input of Kerr cell sync driver is described photodetector output, and its built-in delayer is that 0～1 μ s time-delay is adjustable continuously.
Further:
The output impedance of described square wave signal generator is 50 Ω, and the absolute frequency stability is 5 * 10
- 6Hz;
The response frequency of described photodetector is up to 2GHz, and the crest voltage of its output electric pulse sequence is higher than 1V.
Further:
The output signal of described first delayer and the relative time delay amount of jitter between the input signal are not higher than 20ns;
Described second delayer and the 3rd delayer delay jitter amount separately all is lower than 400ps, and the relative time delay amount of jitter between the corresponding rising edge of two delayer output signals is lower than 100ps;
Each road delay jitter amount of described multichannel delayer all is lower than 200ps;
The high level pulse width of described first delayer, second delayer and the 3rd delayer output signal is 600ns.
Further:
Described frequency multiplier is that the mode that the rising edge by input 10Hz signal regularly triggers segment switch realizes the frequency multiplication process of 10Hz to 1kHz, the absolute frequency stability of its output signal is 0.01Hz, be output as standard TTL signal, output impedance is 50 Ω, the a certain rising edge of the rising edge of input 10Hz signal and its output 1kHz signal is synchronous, about the rising edge time-delay 20ns of this rising edge of output signal with respect to input signal, the delay jitter amount is lower than 50ps.
Further:
Described first pounces on Kerr cell sync driver and second pounces on the high level pulse width of the external trigger input signal of Kerr cell sync driver and is lower than 1 μ s, output signal equates that with the frequency of external trigger input signal the delay jitter amount of its built-in delayer is lower than 100ps.
The terawatt (TW) level femto-second laser amplifying device that the synchronous sequencing control technology of existing electronics is suitable for all is the situation of pulse repetition frequency identical (or even laser of same type) of the pump laser of each amplifying stage, and the present invention is except being applicable to the related laser amplification device type of prior art, the main situation that also is applicable to the pulse repetition frequency difference (or even dissimilar lasers) of the pump laser of each amplifying stage in the amplifying device, therefore compared with the prior art, the present invention has the bigger scope of application.The frequency doubling technology that frequency multiplier adopted among the present invention, compare with existing phase-locked loop (PLL) frequency doubling technology, synchronization accuracy between its input signal rising edge and a certain rising edge of output signal is than high 2～3 orders of magnitude of PLL, thereby can guarantee better that two types of precise synchronization between the laser trigger.If frequency multiplier adopts PLL,, can not satisfy matching requirements because precision is not enough.
Because high-accuracy electronic synchronous sequential control system is an indispensable part in the terawatt (TW) level femto-second laser amplifying device, therefore the present invention's, high-energy stable for amplifying device output and high-quality femto-second laser pulse provide necessary reliable assurance, have also filled up the blank of still not having this type of Related product in the world at present simultaneously.
Description of drawings
Below in conjunction with the drawings and specific embodiments the present invention is described in further detail:
Fig. 1 is the schematic diagram of the terawatt (TW) level femto-second laser amplifying device that the present invention was suitable for;
Fig. 2 is used for the electronic synchronous sequential control system schematic diagram of femto-second laser amplifying device for the present invention;
Fig. 3 is used for signal port connection diagram in the electronic synchronous sequential control system of femto-second laser amplifying device for the present invention;
Fig. 4 is used for the structural representation of frequency multiplier in the electronic synchronous sequential control system of femto-second laser amplifying device for the present invention;
Fig. 5 amplifies and the turned letter procedure chart for the vibration of the terawatt (TW) level femto-second laser amplifying device regeneration endovenous laser pulse that the present invention was suitable for.
Embodiment
Embodiment 1:
As shown in Figure 1, a kind of terawatt (TW) level femto-second laser amplifying device comprises an oscillator, a stretcher, a prime amplifier, a main amplifier and a compressor reducer.Oscillator is by the continuous pump laser pumping of power stability, produce the femtosecond mode locking pulse sequence of 70MHz～80MHz, it provides the most initial seed laser pulse for whole amplifying device, the repetition frequency domain of pulse generally is not subjected to external control, its part laser is received by photodetector and is converted into electrical pulse sequence, thereby has formed a stable clock frequency signal source.Stretcher is used for the femtosecond pulse broadening is become chirped pulse, does not have pumping source to participate in here, does not relate to time synchronization problem.Prime amplifier is the regenerative amplifier of 1kHz, and by the kHz laser pumping of LD pumping, the menu of the amplifying laser in the regenerative amplifier and turned letter are pounced on Kerr cell by first and finished.The amplifying laser pulse of prime amplifier output is pounced on the main amplifier that is injected into the back behind the Kerr cell menu through second, and main amplifier is the multi-pass amplifier of 10Hz, by a YAG laser and the 2nd YAG laser two directional pump.Enter compressor reducer at last from the amplifying laser pulse of main amplifier output and compress, no pumping source participates in the compressor reducer, and pulse repetition frequency also need not change again, so needn't consider time synchronization problem here.Be terawatt (TW) level femtosecond laser after the amplification from the pulse of compressor reducer output.
To shown in Figure 4, the invention provides a kind of electronic synchronous sequential control system that is used for femto-second laser amplifying device as Fig. 2, comprising:
A square wave signal generator is used to produce total clock control signal;
A photodetector is used to receive the locked mode signal of seed laser;
Four delayers are used to produce the signal of different sequential, are respectively first delayer, second delayer, the 3rd delayer and multichannel delayer;
A frequency multiplier is used to produce the signal of upper frequency, and the frequency multiplication principle of frequency multiplier is that the mode that the rising edge by input signal regularly triggers segment switch realizes that input signal arrives the frequency multiplication process of output signal;
Pounce on the Kerr cell sync driver for two, be respectively first and pounce on the Kerr cell sync driver, be used to control one and pounce on Kerr cell and carry out laser pulse menu and turned letter; Second pounces on the Kerr cell sync driver, is used to control another and pounces on Kerr cell and carry out the laser pulse menu.
The signal of square wave signal generator output port 4 outputs is divided into three the tunnel, the first via is imported the input port 9 of first delayer, the xenon lamp switch triggering input 21 of the YAG laser in the second tunnel input femto-second laser amplifying device, be used to trigger the xenon lamp switch of a YAG laser, Third Road is imported the xenon lamp switch triggering input 25 of the 2nd YAG laser in the femto-second laser amplifying device, is used to trigger the xenon lamp switch of the 2nd YAG laser;
The signal of first delayer output is divided into two-way, and the input port 3, the second tunnel of first via input frequency multiplier is imported the input port 5 of second delayer;
The external trigger input port 12 of Kerr cell sync driver is pounced in the signal input second of second delayer output;
Frequency multiplier comprises external control pulse signal generator, pulse signal synthesizer, the input of external control pulse signal generator is connected with the first input end of pulse signal synthesizer, the output of external control pulse signal generator is connected with second input of pulse signal synthesizer, the signal of frequency multiplier output is divided into two-way, the Q switching of the kHz laser of the LD pumping in the first via input femto-second laser amplifying device triggers the input port 6 that input port 29, the second tunnel is imported the 3rd delayer;
The external trigger input port 17 of Kerr cell sync driver is pounced in the signal input first of the 3rd delayer output port 2 outputs;
First signal of pouncing on the first time-delay output port, 19 outputs of Kerr cell sync driver is imported first in the femto-second laser amplifying device and is pounced on the turned letter triggering input port 24 that Kerr cell is pounced in the signal input first of menu triggering input port 22, the second time-delay output ports 20 outputs of Kerr cell;
The signal of photodetector (being specially the PIN photoelectric diode) electrical signal mouth 15 outputs is divided into two-way, the first via is imported the RF input port 16 that the Kerr cell sync driver is pounced in second RF input port 11, the second tunnel input first of pouncing on the Kerr cell sync driver;
Second signal of pouncing on time-delay output port 14 outputs of Kerr cell sync driver is imported the menu triggering input port 18 that second in the femto-second laser amplifying device pounced on Kerr cell, the external trigger input port 30 of the signal input multichannel delayer of synchronous output end mouth 13 outputs;
The Q switching of the YAG laser in the signal input femto-second laser amplifying device of Q switching triggering input port 27, the second time-delay output ports 32 outputs of the 2nd YAG laser in the signal input femto-second laser amplifying device of the first time-delay output port, 31 outputs of multichannel delayer triggers input port 23.
The frequency of the signal of square wave signal generator output is 10Hz;
Photodetector adopts PIN photodiode, is the fast-response photodiode, and its peak wavelength to the light wave response is 760nm;
First delayer is that 180 μ s～240 μ s time-delay is adjustable continuously;
Second delayer and the 3rd delayer are that 2 μ s～4 μ s time-delay is adjustable continuously;
Each road time-delay output of multichannel delayer all is that 0～2 μ s time-delay is adjustable continuously with respect to input signal;
The incoming frequency of frequency multiplier is 10Hz, and output frequency is 1kHz;
First pounces on Kerr cell sync driver and second pounces on 70MHz～80MHz locked mode electric impulse signal that the RF input of Kerr cell sync driver is photodetector output, and its built-in delayer is that 0～1 μ s time-delay is adjustable continuously.
The output impedance of square wave signal generator is 50 Ω, and the absolute frequency stability is 5 * 10
-6Hz;
The response frequency of photodetector is up to 2GHz, and the crest voltage of its output electric pulse sequence is higher than 1V.
The output signal of first delayer and the relative time delay amount of jitter between the input signal are not higher than 20ns;
Second delayer and the 3rd delayer delay jitter amount separately all is lower than 400ps, and the relative time delay amount of jitter between the corresponding rising edge of two delayer output signals is lower than 100ps;
Each road delay jitter amount of multichannel delayer all is lower than 200ps;
The high level pulse width of first delayer, second delayer and the 3rd delayer output signal is 600ns.
The frequency multiplication principle of frequency multiplier and non-common phase-locked loop (PLL) technology, but regularly triggering the mode of segment switch, the rising edge by input 10Hz signal realizes the frequency multiplication process of 10Hz to 1kHz, the absolute frequency stability of its output signal is 0.01Hz, be output as standard TTL signal, output impedance is 50 Ω, the a certain rising edge of the rising edge of input 10Hz signal and its output 1kHz signal is synchronous, about the rising edge time-delay 20ns of this rising edge of output signal with respect to input signal, the delay jitter amount is lower than 50ps.
First pounces on Kerr cell sync driver and second pounces on the high level pulse width of the external trigger input signal of Kerr cell sync driver and is lower than 1 μ s, and output signal equates that with the frequency of external trigger input signal the delay jitter amount of its built-in delayer is lower than 100ps.
Each signal port in the system is connected by mode shown in Figure 3, and the parameter of concrete connected mode and each several part function element is provided with following (each port is BNC (Bayonet NeillConcelman, coaxial cable interface) interface):
The 10Hz signal that the output port 4 of square wave signal generator is exported is divided into three the tunnel, wherein two-way inserts the xenon lamp triggering input port 21 of a YAG laser and the xenon lamp triggering input port 25 of the 2nd YAG laser respectively, Third Road inserts the input port 9 of first delayer, the signal of output port 10 output of first delayer divides the input port 3 that two-way inserts frequency multiplier respectively and the input port 5 of second delayer, the Q switching that the signal of output port 7 output of frequency multiplier is inserted semiconductor pumped kHz laser triggers input port 29, the signal that the output port 7 of frequency multiplier is exported inserts the input port 6 of the 3rd delayer simultaneously, the signal of output port 2 output of the 3rd delayer is inserted the first external trigger port one 7 of pouncing on the Kerr cell sync driver, the signal of output port 1 output of second delayer is inserted the second external trigger input port 12 of pouncing on the Kerr cell sync driver, the signal of PIN photodetector output is inserted the RF input port 11 that the first RF input port 16 and second of pouncing on the Kerr cell sync driver is pounced on the Kerr cell sync driver simultaneously, first time delayed signal of pouncing on the first time-delay output port 19 of Kerr cell sync driver and second time-delay output port 20 output inserted respectively first menu of pouncing on Kerr cell triggers input port 22 and turned letter triggers input port 24, second time delayed signal of pouncing on time-delay output port 14 outputs of Kerr cell sync driver is inserted second menu of pouncing on Kerr cell trigger input port 18, second synchronizing signal of pouncing on synchronous output end mouth 13 output of Kerr cell sync driver is inserted the external trigger input port 30 of multichannel delayer, and the Q switching that the Q switching that at last the two-way time delayed signal of the first time-delay output port 31 of multichannel delayer and 32 outputs of the second time-delay output port is inserted the 2nd YAG laser respectively triggers an input port 27 and a YAG laser triggers input port 23.
As shown in Figure 4, be divided into two-way from the pulse signal of the 10Hz of the output port of first delayer output, wherein one the tunnel be subjected to the pulse signal generator of external signal control as triggering signal input one, produce a series of pulse signals by it then, the sequential of triggering signal and output pulse signal is as follows: the rising edge trigger signal generator of 10Hz pulse signal, it produces the 1st pulse signal behind time-delay 1ms, and behind time-delay 2ms, produce the 2nd pulse signal, time-delay 3ms produces the 3rd pulse signal ....Delay time down with this, once trigger common property and give birth to 99 pulse signals, produce back 1ms at the 99th pulse signal, generator is subjected to the triggering of the next pulse of 10Hz signal again, thereby produces 99 pulses that time delay interval is 1ms again.By the pulse train of signal generator generation and common the input in the pulse signal synthesizer of pulse signal of 10Hz, by its synthetic 1kHz pulse signal that produces 1k pulse of per second.
From the design principle of this circuit as can be seen, not (not the having the relative time shake) that some pulse in the 1kHz signal that the pulse of 10Hz signal is always exported with being subjected to its triggering is synchronous fully, this is the elite place of this circuit, and this synchronization accuracy that it is realized is that PLL is incomparable.Control the output of two pulse lasers respectively with 10Hz signal in this circuit and 1kHz signal, time synchronized that can high-precision realization two bundle laser pulses.
After above-mentioned connection procedure finishes, at first regulate the laser energy that enters the PIN photodetector, make the crest voltage of its output electric pulse signal be higher than 1V; Regulate the time-delay of first delayer, make its value equal the Q switching and the desired delay value of xenon lamp switch of two YAG lasers; The time-delay of the 3rd delayer is set, makes its delay value equal time-delay between the electric impulse signal of the laser pulse output time of kHz laser of LD pumping and its triggering Q switching, the time-delay of second delayer also is set on this value; Regulate first two built-in delayers pouncing in the Kerr cell sync driver, regulate the time-delay of the first time-delay output earlier, make first to pounce on Kerr cell realization 1kHz laser pulse menu, regulate the time-delay of the second time-delay output then, when the laser pulse vibration in the terawatt (TW) level femto-second laser amplifying device regeneration chamber is amplified to maximum, make first to pounce on Kerr cell, realize the turned letter of amplifying laser pulse, as shown in Figure 5 the laser pulse moment derivation in the chamber.Regulate the second time-delay output of pouncing on the Kerr cell sync driver, make second to pounce on the laser pulse menu of Kerr cell realization from 1kHz to 10Hz; Regulate the two-way time-delay output of the multichannel delayer first time-delay output port 31 and the second time-delay output port 32 respectively, until the pulsed laser energies of many logical amplification process outputs reach maximum when the most steady till.
Embodiment 2:
The parameter setting of the connected mode of each signal port and each several part function element such as embodiment 1.But for dissimilar lasers different frequency requirement is arranged, the output frequency of square wave signal generator can not be 10Hz, but M (value of M can be 1,2,3 ...) Hz, the i.e. repetition rate of the used pumping laser of main amplifier; The output frequency of frequency multiplier is 1kHz not necessarily also, but M * N (value of N can be 2,3,4 ...) Hz, the i.e. repetition rate of the used pumping laser of prime amplifier.Simultaneously, require to have different delay values for dissimilar lasers, first delayer can be different from 180 above-mentioned μ s～240 μ s reference time delay, second delayer and the 3rd delayer also can be different from 2 above-mentioned μ s～4 μ s reference time delay, and the time-delay setting of second delayer and the 3rd delayer also can be different, can determine according to actual needs.
Claims (7)
1. electronic synchronous sequential control system that is used for femto-second laser amplifying device is characterized in that comprising:
A square wave signal generator is used to produce total clock control signal;
A photodetector is used to receive the locked mode signal of seed laser;
Four delayers are used to produce the signal of different sequential, are respectively first delayer, second delayer, the 3rd delayer and multichannel delayer;
A frequency multiplier is used to produce the signal of upper frequency, and the frequency multiplication principle of described frequency multiplier is that the mode that the rising edge by input signal regularly triggers segment switch realizes that input signal arrives the frequency multiplication process of output signal;
Pounce on the Kerr cell sync driver for two, be respectively first and pounce on the Kerr cell sync driver, be used to control one and pounce on Kerr cell and carry out laser pulse menu and turned letter; Second pounces on the Kerr cell sync driver, is used to control another and pounces on Kerr cell and carry out the laser pulse menu.
2. the electronic synchronous sequential control system that is used for femto-second laser amplifying device according to claim 1 is characterized in that:
The signal of described square wave signal generator output is divided into three the tunnel, the first via is imported first delayer, the xenon lamp switch triggering input of the YAG laser in the second tunnel input femto-second laser amplifying device, the xenon lamp switch triggering input of the 2nd YAG laser in the Third Road input femto-second laser amplifying device;
The signal of described first delayer output is divided into two-way, and the first via is imported described frequency multiplier, and the second the tunnel imports described second delayer;
The signal of described second delayer output is imported the described second external trigger input of pouncing on the Kerr cell sync driver;
Described frequency multiplier comprises external control pulse signal generator, pulse signal synthesizer, the input of described external control pulse signal generator is connected with the first input end of described pulse signal synthesizer, the output of described external control pulse signal generator is connected with second input of described pulse signal synthesizer, the signal of described frequency multiplier output is divided into two-way, the Q switching of the kHz laser of the LD pumping in the first via input femto-second laser amplifying device triggers input, and the second the tunnel imports described the 3rd delayer;
The signal of described the 3rd delayer output is imported the described first external trigger input of pouncing on the Kerr cell sync driver;
Described first signal of pouncing on the first time-delay output output of Kerr cell sync driver is imported the menu triggering input that first in the femto-second laser amplifying device pounced on Kerr cell, and the turned letter triggering input of Kerr cell is pounced in the signal input first of the second time-delay output output;
The signal of described photodetector output is divided into two-way, and the first via is imported the described second RF input of pouncing on the Kerr cell sync driver, and the second the tunnel imports the described first RF input of pouncing on the Kerr cell sync driver;
Described second signal of pouncing on the time-delay output output of Kerr cell sync driver is imported the menu triggering input that second in the femto-second laser amplifying device pounced on Kerr cell, and the signal of synchronous output end output is imported the external trigger input of described multichannel delayer;
The Q switching of the 2nd YAG laser in the signal input femto-second laser amplifying device of the first time-delay output output of described multichannel delayer triggers input, and the Q switching of the YAG laser in the signal input femto-second laser amplifying device of the second time-delay output output triggers input.
3. the electronic synchronous sequential control system that is used for femto-second laser amplifying device according to claim 2 is characterized in that:
The frequency of the signal of described square wave signal generator output is 10Hz;
Described photodetector is the PIN photodetector, is the fast-response photodiode, and its peak wavelength to the light wave response is 760nm;
Described first delayer is that 180 μ s～240 μ s time-delay is adjustable continuously;
Described second delayer and the 3rd delayer are that 2 μ s～4 μ s time-delay is adjustable continuously;
Each road time-delay output of described multichannel delayer all is that 0～2 μ s time-delay is adjustable continuously with respect to input signal;
The incoming frequency of described frequency multiplier is 10Hz, and output frequency is 1kHz;
Described first pounces on Kerr cell sync driver and second pounces on 70MHz～80MHz locked mode electric impulse signal that the RF input of Kerr cell sync driver is described photodetector output, and its built-in delayer is that 0～1 μ s time-delay is adjustable continuously.
4. the electronic synchronous sequential control system that is used for femto-second laser amplifying device according to claim 3 is characterized in that:
The output impedance of described square wave signal generator is 50 Ω, and the absolute frequency stability is 5 * 10
-6Hz;
The response frequency of described photodetector is up to 2GHz, and the crest voltage of its output electric pulse sequence is higher than 1V.
5. the electronic synchronous sequential control system that is used for femto-second laser amplifying device according to claim 4 is characterized in that:
The output signal of described first delayer and the relative time delay amount of jitter between the input signal are not higher than 20ns;
Described second delayer and the 3rd delayer delay jitter amount separately all is lower than 400ps, and the relative time delay amount of jitter between the corresponding rising edge of two delayer output signals is lower than 100ps;
Each road delay jitter amount of described multichannel delayer all is lower than 200ps;
The high level pulse width of described first delayer, second delayer and the 3rd delayer output signal is 600ns.
6. the electronic synchronous sequential control system that is used for femto-second laser amplifying device according to claim 5 is characterized in that:
Described frequency multiplier is that the mode that the rising edge by input 10Hz signal regularly triggers segment switch realizes the frequency multiplication process of 10Hz to 1kHz, the absolute frequency stability of its output signal is 0.01Hz, be output as standard TTL signal, output impedance is 50 Ω, the a certain rising edge of the rising edge of input 10Hz signal and its output 1kHz signal is synchronous, about the rising edge time-delay 20ns of this rising edge of output signal with respect to input signal, the delay jitter amount is lower than 50ps.
7. the electronic synchronous sequential control system that is used for femto-second laser amplifying device according to claim 4 is characterized in that:
Described first pounces on Kerr cell sync driver and second pounces on the high level pulse width of the external trigger input signal of Kerr cell sync driver and is lower than 1 μ s, output signal equates that with the frequency of external trigger input signal the delay jitter amount of its built-in delayer is lower than 100ps.
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