CN1297268A - Laser device for synchronously outputting 10-TW dual pulses with different widthes - Google Patents
Laser device for synchronously outputting 10-TW dual pulses with different widthes Download PDFInfo
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- CN1297268A CN1297268A CN 00127833 CN00127833A CN1297268A CN 1297268 A CN1297268 A CN 1297268A CN 00127833 CN00127833 CN 00127833 CN 00127833 A CN00127833 A CN 00127833A CN 1297268 A CN1297268 A CN 1297268A
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Abstract
A laser device for synchronously outputting two 10 TW pulses with different width is disclosed. The laser beam from fs mode-locked laser device passes through width widener and splitter to obtain two beams with same energy but different widthes. One beam passes through delay regulator, optical parametric chirp pulse amplifier and width compressor to beam combining guider. Another passes through pumping laser pulse amplifying chain to frequency doubler. The frequency-doubled beam pumps said amplifier. The residual base-frequency beam passes through said compressor and delay regulator to beam combining guider, which outputs said two 10 TW pulses.
Description
The present invention is a kind of double-pulse laser device of synchronous output 10-TW distinct pulse widths, and just a kind of recombination laser device can produce different two ten terawatt (TW)s (10TW) the level laser pulse of pulsewidth simultaneously on this laser aid.
Formerly in the technology, people such as Britain I.N.Ross (referring to: people such as I.N.Ross, Applied Optics, 39 volumes, the 2422-2427 page or leaf, 2000), an optical parameter chirped pulse amplifier is provided, and (English is OpticalParametric Chirped Pulse Amplifiers, so abbreviate OPCPA usually as, this paper is following also to be called for short with this in order to narrate conveniently), it is by the Pockers cell electrooptical switching of signal seed optical pulse Synchronization Control, from about 5ns (ns is nanosecond) grade of pulse that neodymium-doped yttrium-aluminum garnet (Nd:YAG) laser oscillator of transferring Q produces, cut out the pulse that a width is 600ps (ps is a psec), amplify then, frequency multiplication is as the pumping source of OPCPA.The shortcoming of the laser aid structure of this OPCPA is: 1. because the internal performance of the Pockers cell electrooptical switching that it adopts causes unsurmountable time jitter, thereby timing tracking accuracy is low, and device is complicated, adjusts inconvenient; 2. remaining light energy (being fundamental frequency light) does not make full use of after the pumping laser pulse frequency multiplication; 3. its laser aid can only produce the terawatt (TW) level laser pulse of a fixed pulse width.
The purpose of this invention is to provide a kind of 10TW level laser device that can produce two different laser pulse widths of accurate may command timing tracking accuracy.It can produce the 10TW level laser pulse of two distinct pulse widths simultaneously.Particularly the laser pulse scalable relative delay of these two 10TW is carried out needed combination, to satisfy special requirement.
Laser aid of the present invention mainly comprises: femtosecond mode-locked laser 1, pulse duration stretcher 2, beam splitter 3, very first time timer 4, the second time delays adjusters 8, optical parameter chirped pulse amplifier 5, first pulse shortener 6, second pulse shortener 9, pumping laser pulse amplifier chain 11, frequency multiplier 10 and light beam combination guide 7.
The concrete structure of laser aid of the present invention is: by femtosecond mode-locked laser 1 emitted laser bundle G
0Enter pulse duration stretcher 2, by placing the beam splitter 3 in the pulse duration stretcher 2 to be divided into the first bundle laser beam G that pulse duration is unequal, energy equates
1With the second bundle laser beam G
2The first bundle laser beam G that is divided into
1Pass through very first time timer 4 successively, the optical parameter chirped pulse amplifier 5 and first pulse shortener 6 enter the 7 back outputs of light beam combination guide.The second bundle laser beam G that is divided into
2Enter frequency multiplier 10 through pumping laser pulse amplifier chain 11.Frequency multiplication light beam G by frequency multiplier 10 outputs
2 ωEnter optical parameter chirped pulse amplifier 5.Basic frequency beam G by frequency multiplier 10 outputs
jEnter the 7 back outputs of light beam combination guide through second pulse shortener 9 and the second time delays adjuster 8 successively.As shown in Figure 1.
Said pulse duration stretcher 2 mainly contains grating 201, and recessed reflecting surface and the relative concave surface completely reflecting mirror 202 of grating 201 grid faces are arranged, and the protruding reflecting surface convex surface completely reflecting mirror 203 relative with the recessed reflecting surface of concave surface completely reflecting mirror 202 arranged.The 90 degree completely reflecting mirrors 204 that have 90 degree interior reflective surface to put towards grating 201 grid faces.As shown in Figure 2.
Said beam splitter 3 is between the grating 201 and 90 degree completely reflecting mirrors 204 that places in the pulse duration stretcher 2.As shown in Figure 2, beam splitter 3 is that the surface is coated with reflectivity 50%, the parallel flat of transmitance 50% deielectric-coating, or be reflected into 50% through the beam splitter prism that is 50%.
Said femtosecond mode-locked laser 1 is that the outgoing laser beam pulse duration is 10～150 femtoseconds, and energy is received joule (nJ) wavelength X from the adjustable laser oscillator of 750～1100 nanometers (nm) greater than 1.
Said very first time timer 4 mainly contains the one 90 degree completely reflecting mirror 401 and the 2 90 degree completely reflecting mirror 402 that two 90 degree reflectings surface are put relatively.Two 90 degree completely reflecting mirrors 401 and 402 have relative moving mechanism.So two 90 degree completely reflecting mirrors 401 and 402 can relatively move.As shown in Figure 3.
The structure of the said second time delays adjuster 8 is identical with the structure of very first time timer 4.
Said optical parameter chirped pulse amplifier 5 is that the nonlinear crystal that the clear aperture by n 〉=3 grade increases step by step constitutes.Nonlinear crystal is three lithium borates (LBO) crystal, or beta-barium metaborate (BBO) crystal, or potassium dihydrogen phosphate (KDP) crystal, or potassium dideuterium phosphate (DKDP) crystal, or titanyl potassium phosphate (KTP) crystal.The structure of optical parameter chirped pulse amplifier 5 among the embodiment as shown in Figure 4, wherein n=3 is that 3 grades 501,502,503,3 grades bore increases step by step.501 and 502 all is to be made of lbo crystal, the 503rd, constitute by the KDP crystal.
Said first pulse shortener 6 mainly contains a pair of grating, and first grating 601 and second grating, 602, two gratings 601 and 602 grid face half-and-half stagger mutually and put.First completely reflecting mirror 603 that has relative first grating of reflecting surface 601 grid faces to put, second completely reflecting mirror 604 that has relative second grating of reflecting surface 602 grid faces to put.As shown in Figure 5.
The structure of said second pulse shortener 9 is identical with the structure of first pulse shortener 6.The a pair of grating 601 and 602 the parameter of parameter and first pulse shortener 6 of a pair of grating that just constitutes second pulse shortener 9 is different.
Said pumping laser pulse amplifier chain 11 mainly contains light beam and repeatedly comes and goes the main amplifier 1102 that regenerative amplifier 1101 that amplifies and the laser amplifier that is increased step by step by n 〉=3 grade clear aperture constitute in its inside.As shown in Figure 6.
Said light beam combination guide 7 comprises the one 1/2 wavelength sheet 702 and the 2 1/2 wavelength sheet 701, and the light beam that sees through the one 1/2 wavelength sheet 702 is exported through completely reflecting mirror 703 and polarizer 705 to optical rotation plate 704 backs.The light beam that sees through the 2 1/2 wavelength sheet 701 sees through polarizer 705 to optical rotation plate 704 back outputs.As shown in Figure 7.
Further specify the formation and the effect thereof of each several part in the laser aid of the present invention below again.
The parameter of the femtosecond mode-locked laser 1 among Fig. 1 as mentioned above, its can output pulse width be that femtosecond magnitude, spectral bandwidth can reach tens laser pulses to hundreds of nanometer (nm), as the signal source of whole laser aid.
The formation of pulse duration stretcher 2 mainly contains a grating 201, concave surface completely reflecting mirror 202, convex surface completely reflecting mirror 203 and 90 degree completely reflecting mirrors 204 among Fig. 2, femto-second laser pulse in entering pulse duration stretcher 2 is process between grating 201 and concave surface completely reflecting mirror 202 repeatedly, just laser beam repeatedly stands the GVD (Group Velocity Dispersion) effect of optical grating diffraction, the spectral components generation of forming laser pulse is warbled, thereby make the time width broadening of laser pulse.
Beam splitter 3 is that to be coated with reflection and to see through respectively be the speculum of 50% deielectric-coating (T～R～50%), and it is placed in the light path in the pulse duration stretcher 2, as shown in Figure 2.Its chirped laser pulse after with pulse stretching is divided into unequal two pulses of pulse duration of homenergic, respectively as the seed signal light of optical parameter chirped pulse amplifier (OPCPA) 5 and the pulse light of pumping laser pulse amplifier chain 11.
Very first time timer 4 as shown in Figure 3.It mainly contains two 90 degree completely reflecting mirrors 401 that can relatively move, 402, opposing parallel moves 401 and at 402 o'clock, can make the seed signal light that incides on the optical parameter chirped pulse amplifier 5 obtain the time delay that needs, seed signal light can synchronously be arrived in the optical parameter chirped pulse amplifier 5 as pump beam with the frequency multiplication light beam of frequency multiplier 10 outputs, thereby realize amplification.
Optical parameter chirped pulse amplifier 5 as shown in Figure 4.It is cut into the nonlinear crystal that the clear aperture of n 〉=3 grade increases step by step according to the determined coupling angle of laser parameter amplifier and constitutes.As lbo crystal among Fig. 4 501 and 502, and KDP crystal 5 03, the first bundle laser beam G that tells by beam splitter 3
1Seed signal light and the frequency doubled light as the optical parameter chirped pulse amplifier 5 that penetrate through very first time timer 4 carry out the conllinear synchronous pump, obtain needed gain and amplifying signal thereby make seed signal light do no spectrum distortion amplification.
Light beam combination guide 7 as shown in Figure 7.It comprises the optical rotation plate 704 of the one 1/2 wavelength sheet 702 and the 2 1/2 wavelength sheet 701, polarizer 705, completely reflecting mirror 703 and 45 degree quartz crystals.Polarizer 705 is polarizers that multilayer dielectric film is arranged.When two bundle laser beams enter respectively in the light beam combination guide 7 behind the one 1/2 wavelength sheet 702 and the 2 1/2 wavelength sheet 701, respectively two polarization states of restrainting incident beams are corrected to vertical (being called " quadrature ") mutually by two 1/2 wavelength sheets 702 with 701 again, the light beam that is penetrated by the one 1/2 wavelength sheet 702 is after completely reflecting mirror 703 reflections, to be mapped near Brewster's angle on the polarizer 705, again by polarizer 705 reflections.The light beam that is penetrated by the 2 1/2 wavelength sheet 701 sees through polarizer 705, and this moment, the two-beam optical axis coincided together.But two light pulses not necessarily overlap in time, overlap as needs, can regulate the second time delays adjuster 8.The two-beam that is penetrated by polarizer 705 all passes through one 45 optical rotation plate 704 of spending quartz crystal, and then after this polarization direction of two-beam just reaches consistent.Light beam combination guide 7 among the present invention can make the not impaired lost territory of whole energy (or power) of two bundle polarised lights be superimposed together.
Frequency multiplier 10 mainly is to be made of frequency-doubling crystal, as potassium dihydrogen phosphate (KDP) crystal, and beta-barium metaborate (BBO) crystal, potassium dideuterium phosphate (DKDP) crystal etc.It can carry out frequency multiplication with the laser pulse (fundamental frequency omega) of incident with certain conversion efficiency, produces frequency multiplication (2 ω) light beam G
2 ωWith remaining basic frequency beam G
j
Pumping laser pulse amplifier chain 11 as shown in Figure 6.The regenerative amplifier 1101 that it repeatedly come and go to be amplified in its inside by a light pulse and form by the main amplifier 1102 that the laser amplifier that the clear aperture of n 〉=3 grade increases step by step constitutes.Regenerative amplifier can have only energy the pump light source pulse signal of 1nJ to be amplified to a few mJ magnitudes, and then by main amplifier the energy of laser pulse further is amplified to the level that needs, for example tens J magnitudes.Pumping laser pulse amplifier chain 11 can make the spectrum of the pulse signal that is exaggerated keep certain width.
The running of laser aid of the present invention is: by the laser pulse of same femtosecond mode-locked laser 1 output through pulse width stretcher 2 with pulse stretching, laser pulse during to 300ps is divided into the two-beam that energy equates with broadening by beam splitter 3, exports the first bundle laser beam light G this moment
1Seed signal light as optical parameter chirped pulse amplifier 5, at first enter very first time timer 4, after entering optical parameter chirped pulse amplifier 5 again and being amplified to the energy needed level, enter first pulse shortener, 6 pulse-width and compress, reach the power level of 10TW/～100fs (fs is a femtosecond).The second bundle laser beam G that tells by beam splitter 3
2Broadened device 2 continues broadening to 600ps, as the pump light source pulse signal, sends 11 amplifications of pumping laser pulse amplifier chain to and reaches the energy needed level, passes through frequency multiplier 10 frequencys multiplication again.Frequency multiplication light beam G by frequency multiplier 10 outputs
2 ωBe led to optical parameter chirped pulse amplifier 5 as pump beam, and remaining laser pulse is basic frequency beam G after the frequency multiplication
jBe sent to second pulse shortener 9 and carry out pulsewidth compression, reach the level of 10TW/～1ps after, enter light beam combination guide 7 by the second time delays adjuster 8 again.10TW laser pulse light beam after two bundles are compressed enters light beam combination guide 7, just can carry out the combination of time delay or intensity as required, and output is at last used.
Advantage of the present invention is:
1. restraint laser beam G as second of pump light source pulse signal
2With the first bundle laser beam G as the seed signal light of optical parameter chirped pulse amplifier 5
1All be to come from same mode-locked laser pulse, therefore, two high-power laser pulses after two pulse signals amplify each other or through amplifier, can reach synchronously accurate with simple time delays adjuster 4 and 8, its synchronization accuracy can reach 10 femtoseconds following (only being subjected to the restriction of monitoring instrument resolution), and does not produce shake.
2. restraint laser beam G as second of pump light source pulse signal
2Amplify after remaining basic frequency beam G after frequency multiplier 10 frequencys multiplication
jEnergy can make full use of.Because this laser beam G
jThe pump light source pulse signal have the bandwidth of femtosecond pulse, and when amplifying, be again to remain on certain bandwidth, Gu remaining light pulse can be carried out the pulsewidth compression with second pulse shortener 9 after this frequency multiplication, reaches～1 picosecond magnitude, and can produce the laser pulse of 10TW/～1ps.
3. by the light pulse of optical parameter chirped pulse amplifier 5 outputs, after 6 compressions of first pulse shortener, can produce the laser pulse of 10TW/～100fs.Remaining light pulse G after this pulse and the above-mentioned pump light source pulse signal frequency multiplication
jHave identical power after compression, and the pulse duration difference.In actual applications, the work that separately the pulse of can applying in a flexible way is correlated with perhaps makes the pulse of two 10TW level lasers with accurate controlled timing tracking accuracy, makes up with light beam combination guide 7, thereby satisfies different requirements.
Description of drawings:
Fig. 1 is a laser aid structural representation of the present invention
Fig. 2 is the pulse duration stretcher in the laser aid of the present invention 2 and the structure of beam splitter 3 schematic diagram of arranging
Fig. 3 is the light path schematic diagram of very first time delay modulator 4 in the laser aid of the present invention
Fig. 4 is the structural representation of optical parameter chirped pulse amplifier 5 in the laser aid of the present invention
Fig. 5 is the structural representation of first pulse shortener 6 in the laser aid of the present invention
Fig. 6 is the structural representation of pumping laser pulse amplifier chain 11 in the laser aid of the present invention
Fig. 7 is the structural representation of light beam combination guide 7 in the laser aid of the present invention
Below in conjunction with the description of drawings embodiments of the invention.
Embodiment:
Structure as shown in Figure 1.Femtosecond mode-locked laser 1 is the femtosecond locked mode ti sapphire laser of a kerr lens self mode locking mode, the wavelength of exporting a row pulsewidth and be 100fs is the mode locking pulse of 1064nm, single pulse energy～3nJ, after entering pulse duration stretcher 2, when laser pulse width broadening during, tell the first bundle laser beam G of the light of 50% energy by beam splitter 3 as the seed signal light of optical parameter chirped pulse amplifier 5 to 300ps
1, energy about 1 is received joule (1nJ), and the light pulse of remaining 50% energy is continued broadening to 600ps, and as the second bundle laser beam G of pump light source pulse signal
2, energy about 1 is received joule.With the first bundle laser beam G
1Deliver to very first time timer 4, after the adjusting appropriate time postpones, send to by frequency multiplier 10 output frequency multiplication light beam G
2 ωAmplify in the optical parameter chirped pulse amplifier 5 as pump light and its synchronous pump.Optical parameter chirped pulse amplifier 5 is the n=3 level in the present embodiment, be by two lbo crystals as first amplifying stage 501, second amplifying stage 502 and a KDP crystal as the 3rd amplifying stage 503, as shown in Figure 4.Be compressed into the high-power laser pulse of 10TW/～200fs (the about 2J of energy) again through first pulse shortener 6 by the light pulse of optical parameter chirped pulse amplifier 5 outputs; The second bundle laser beam G
2Be sent to pumping laser pulse amplifier chain 11 (pumping laser pulse amplifier chain 11 mainly is the main amplifier that neodymium glass regenerative amplifier and n=7 level neodymium glass amplifier constitute in the present embodiment) and be amplified to the level of 30J, after frequency multiplier 10 frequencys multiplication, obtain the 532nm/500ps green glow of 15J, be sent to optical parameter chirped pulse amplifier 5 and make pump light.The 1064nm/600ps laser pulse of the 15J of frequency multiplication remainder enters second pulse shortener 9, is compressed into the light pulse of 10TW/～800fs (the about 8J of energy).Light pulse after two compressions is carried out various time delays and combination by the second time delays adjuster 8 and light beam combination guide 7, and output is at last used.
Claims (9)
1. synchronous double-pulse laser device of output 10-TW distinct pulse widths, comprise: femtosecond mode-locked laser (1), pulse duration stretcher (2), beam splitter (3), time delays adjuster (4,8), optical parameter chirped pulse amplifier (5), pulse shortener (6,9) and frequency multiplier (10) is characterized in that concrete structure is:
＜1〉femtosecond mode-locked laser (1) emitted laser bundle (G
0) enter pulse duration stretcher (2), unequal by placing the interior beam splitter (3) of pulse duration stretcher (2) to be divided into pulse duration, the first bundle laser beam (G that energy equates
1) and the second bundle laser beam (G
2);
＜2〉the first bundle laser beam (G that is divided into
1) passing through very first time timer (4) successively, optical parameter chirped pulse amplifier (5) and first pulse shortener (6) enter the output of light beam combination guide (7) back;
＜3〉the second bundle laser beam (G that is divided into
2) enter frequency multiplier (10) through pumping laser pulse amplifier chain (11);
＜4〉the frequency multiplication light beam (G that exports by frequency multiplier (10)
2 ω) enter optical parameter chirped pulse amplifier (5), by the basic frequency beam (G of frequency multiplier (10) output
j) enter the output of light beam combination guide (7) back through second pulse shortener (9) and the second time delays adjuster (8).
2. the double-pulse laser device of synchronous output 10-TW distinct pulse widths according to claim 1, it is characterized in that said light beam combination guide (7) comprises the one 1/2 wavelength sheet (702) and the 2 1/2 wavelength sheet (701), the light beam that sees through the one 1/2 wavelength sheet (702) is exported to optical rotation plate (704) through completely reflecting mirror (703) and polarizer (705), and the light beam that sees through the 2 1/2 wavelength sheet (701) is exported through polarizer (705) to optical rotation plate (704) back.
3. the double-pulse laser device of synchronous output 10-TW distinct pulse widths according to claim 1, it is characterized in that said pulse duration stretcher (2) contains grating (201), the recessed reflecting surface concave surface completely reflecting mirror (202) relative with grating (201) grid face arranged, the protruding reflecting surface convex surface completely reflecting mirror (203) relative with the recessed reflecting surface of concave surface completely reflecting mirror (202) arranged, the 90 degree completely reflecting mirrors (204) that have 90 degree interior reflective surface to put towards grating (201) grid face; Said beam splitter (3) is between the grating (201) and 90 degree completely reflecting mirrors (204) that places in the pulse duration stretcher (2).
4. the double-pulse laser device of synchronous output 10-TW distinct pulse widths according to claim 1, it is characterized in that said femtosecond mode-locked laser (1) is that the outgoing laser beam pulse duration is 10～150 femtoseconds, energy is received joule greater than 1, and wavelength is from the adjustable laser oscillator of 750～1100 nanometers.
5. the double-pulse laser device of synchronous output 10-TW distinct pulse widths according to claim 1, it is characterized in that said very first time timer (4) mainly contains the one 90 degree completely reflecting mirror (401) and the 2 90 degree completely reflecting mirror (402) that two 90 degree reflectings surface are put relatively, two 90 degree completely reflecting mirrors (401,402) have relative moving mechanism, the structure of the said second time delays adjuster (8) is identical with the structure of very first time timer (4).
6. the double-pulse laser device of synchronous output 10-TW distinct pulse widths according to claim 1, it is characterized in that said optical parameter chirped pulse amplifier (5) is the non-linear lithium triborate crystal that the clear aperture by n 〉=3 grade increases step by step, or beta-barium metaborate crystal, or potassium dihydrogen phosphate crystal, or the potassium dideuterium phosphate crystal, or titanyl potassium phosphate crystal constitutes.
7. the double-pulse laser device of synchronous output 10-TW distinct pulse widths according to claim 1 is characterized in that the main amplifier (1102) that said pumping laser pulse amplifier chain (11) mainly contains regenerative amplifier (1101) and the laser amplifier that increased step by step by n 〉=3 grade clear aperture constitutes.
8. the double-pulse laser device of synchronous output 10-TW distinct pulse widths according to claim 1, it is characterized in that said first pulse shortener (6) mainly contains first grating (601) and second grating (602) that a pair of grid face half-and-half staggers and puts mutually, first completely reflecting mirror (603) that has relative first grating of reflecting surface (601) grid face to put, second completely reflecting mirror (604) that has relative second grating of reflecting surface (602) grid face to put; The structure of said second pulse shortener (9) is identical with the structure of first pulse shortener (6).
9. the double-pulse laser device of synchronous output 10-TW distinct pulse widths according to claim 1, it is characterized in that said beam splitter (3) is the parallel flat that the surface is coated with reflectivity 50% and transmitance 50% deielectric-coating, or be reflected into 50% through the beam splitter prism that is 50%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00127833 CN1123102C (en) | 2000-12-08 | 2000-12-08 | Laser device for synchronously outputting 10-TW dual pulses with different widthes |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00127833 CN1123102C (en) | 2000-12-08 | 2000-12-08 | Laser device for synchronously outputting 10-TW dual pulses with different widthes |
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| Publication Number | Publication Date |
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| CN1297268A true CN1297268A (en) | 2001-05-30 |
| CN1123102C CN1123102C (en) | 2003-10-01 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100383656C (en) * | 2006-05-31 | 2008-04-23 | 中国科学院上海光学精密机械研究所 | Laser pulse width control method and device |
| CN107069398A (en) * | 2017-04-07 | 2017-08-18 | 长春理工大学 | Dipulse square wave optical fiber laser |
| CN111900609A (en) * | 2020-07-31 | 2020-11-06 | 浙江富春江环保科技研究有限公司 | Pulse delay controllable double-beam laser system and control method thereof |
| CN113948945A (en) * | 2021-10-19 | 2022-01-18 | 中国科学院上海高等研究院 | Coherent terahertz radiation generation device and method based on compact accelerator |
| CN114097149A (en) * | 2019-07-09 | 2022-02-25 | Ipg光子公司 | Laser system with pulse duration switch |
-
2000
- 2000-12-08 CN CN 00127833 patent/CN1123102C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100383656C (en) * | 2006-05-31 | 2008-04-23 | 中国科学院上海光学精密机械研究所 | Laser pulse width control method and device |
| CN107069398A (en) * | 2017-04-07 | 2017-08-18 | 长春理工大学 | Dipulse square wave optical fiber laser |
| CN114097149A (en) * | 2019-07-09 | 2022-02-25 | Ipg光子公司 | Laser system with pulse duration switch |
| CN111900609A (en) * | 2020-07-31 | 2020-11-06 | 浙江富春江环保科技研究有限公司 | Pulse delay controllable double-beam laser system and control method thereof |
| CN113948945A (en) * | 2021-10-19 | 2022-01-18 | 中国科学院上海高等研究院 | Coherent terahertz radiation generation device and method based on compact accelerator |
| CN113948945B (en) * | 2021-10-19 | 2023-03-14 | 中国科学院上海高等研究院 | Coherent terahertz radiation generation device and method based on compact accelerator |
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|---|---|
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