CN101950115B - Multi-way pulse compressor and using method thereof - Google Patents
Multi-way pulse compressor and using method thereof Download PDFInfo
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- CN101950115B CN101950115B CN2010102684981A CN201010268498A CN101950115B CN 101950115 B CN101950115 B CN 101950115B CN 2010102684981 A CN2010102684981 A CN 2010102684981A CN 201010268498 A CN201010268498 A CN 201010268498A CN 101950115 B CN101950115 B CN 101950115B
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Abstract
The invention discloses a multi-way pulse compressor and a using method thereof. The main body of the compressor comprises two end mirrors, the concave spherical surfaces of which are relatively coaxially placed; rotating rings are arranged on the end mirrors; and concave spherical reflectors are arranged in the rotating rings. Dispersion compensation film series are plated on the concave spherical surfaces of the concave spherical reflectors, and through grooves are processed on the reflectors. When the compressor is used, closed annular light spot tracks can be obtained on the concave spherical surfaces by setting and repeatedly adjusting the two end mirrors, and then discrete adjustment is implemented by rotating the compression of the rotating rings on the pulse. The compressor and the using method have the advantages that: the compressor has low loss, a compact structure and no spatial dispersion light path; the concave spherical surfaces can effectively counteract the beam broadening caused by the diffraction effect of beams so as to effectively overcome the defects of the conventional grating pair technology, prism pair technology and plane mirror-based dispersion mirror compensation technology; and the using and adjusting method is simple and convenient.
Description
Technical field
The present invention relates to a kind of many logical pulse shorteners and method of application thereof, it can realize the compression to the ultrashort pulse of warbling, and obtains the more laser pulse output of short pulse width, belongs to the ultra-short pulse laser technical field.
Background technology
Ultra-short pulse laser have peak power high with advantages such as pulse width is narrow, so have a wide range of applications in basic scientific research, national defence sophisticated technology, medical science and life science and micro-nano processing and other fields.
Usually, the ultrashort pulse laser directly ultrashort pulse of output contains certain just warbling, and in order to obtain more short pulse width, i.e. the more pulse of high-peak power needs just warbling of paired pulses to compensate.And the extra negative dispersion of paired pulses introducing can bring negative warbling, and then just warbling of pulse directly exported in compensation.Pulse shortener promptly is to utilize above-mentioned principle outside the chamber, and paired pulses is introduced negative the warbling that a certain amount of negative dispersion brings in compressor reducer, thereby paired pulses compresses.Traditional chamber external compression technology has prism to, grating pair and chromatic dispersion mirror compress technique.Though prism is lower to the technology energy loss, be that the spacing of two prisms is very big usually, even has reached 8m when obtaining the compensation of bigger negative dispersion amount.Though and the grating pair technology can provide bigger negative dispersion compensation amount under less spacing; But owing to the single diffraction efficiency of negative 1 grade of grating can only reach 90% usually; Even adopt high-level efficiency transmission-type grating; The single diffraction efficiency also can only reach 97% in theory, thereby after coming and going through the grating pair device, its energy loss very big (0.97
4* 100%=88.53%).In addition; Prism is to all introducing spatial dispersion with the grating pair technology; Change the beam shape of pulse; Thereby need a light path climb device with the light beam strictness directly over the original light path reflected back prism to or grating pair so that extract the pulse after the compression, this has just increased the complicacy of light path adjustment.Chromatic dispersion mirror compress technique is more perfect compress technique, and it utilizes custom-designed assembly of thin films paired pulses to carry out negative dispersion compensation with the realization pulse compression, and this design can realize very high reflectivity.Occurred a kind of novel high dispersion compensation mirror (high-dispersive mirrors) in 2008, the dispersion compensation of its individual reflection has reached-1300fs at the 800nm place
2, the average reflectance of 780～820nmn has reached 99.95%, and has reached-2500fs at 1030nm annex wave band
2, average reflectance has reached 99.99%.In addition; Chromatic dispersion mirror compensation technique is not introduced spatial dispersion, can take design flexible to specific pulse chirp situation, compensates low order and high-order dispersion simultaneously; And can the compensation than large dispersion be provided through repeatedly reflecting, be a kind of very desirable compensation technique.But; Traditional chromatic dispersion mirror compensation technique is made dispersion compensation film system usually in the planar optics substrate, after repeatedly reflecting, it is very big that hot spot becomes usually; Need the extra increase bundle element that contracts; Bring extra energy loss, increased the number of elements and the complicacy of system, and be difficult for convenient the adjusting.
About relating to technological document of the present invention and report as follows:
[1] D.Herriott, H.Kogelnik, and R.Kompfner; " Off-Axis Paths in Spherical Mirror Interferometers; " Appl.Opt.3,523-526 (1964) " in the spherical mirror interferometer from axial light path " applied optics 3,523-526 (1964)
[2] A.Fernandez, A.Verhoef, V.Pervak; G.Lermann; F.Krausz and A.Apolonski, " Generation of 60-nJ sub-40-fs pulses at 70MHz repetition rate from a Ti:sapphire chirped pulse-oscillator, " Appl.Phys.B 87; 395-398 (2007) " with 60nJ, the inferior 40fs pulse of titanium jewel chirped pulse oscillator generation 70MHz repetition frequency " applied physics B 87,395-398 (2007)
[3] E.B.Treacy; " Optical Pulse Compression with Diffraction Gratings; " IEEE J.Quantum Electron.QE-5,454-458 (1969) " utilize the compression of diffraction grating to optical pulse " quantum electronics are reported QE-5,454-458 (1969)
[4] T.Clausnitzer, J.Limpert, K.Zoellner; H.Zellmer, H-J.Fuchs, E-B.Kley; A.Tuennermann, M.Jupe, and D.Ristau; " Highly efficient transmission gratings in fused silica for chirped-pulse amplification systems; " Appl.Opt.42,6934-6938 (2003) " the high-level efficiency transmission fused quartz grating that designs for chirped pulse amplification system " applied optics 42,6934-6938 (2003)
[5] V.Pervak, C.Teisset, A.Sugita; S.Naumov, F.Krausz, and A.Apolonski; " High-dispersive mirrors for femtosecond lasers; " Opt.Express 16,10220-10233 (2008) " to the high chromatic dispersion mirror of femto-second laser " optics express delivery 16,10220-10233 (2008)
Summary of the invention
The objective of the invention is to overcome the shortcoming of prior art, a kind of how logical pulse shortener that is used to realize high negative dispersion amount compensation is provided.This device can be realized the compression to the ultrashort pulse of warbling, and obtains the more laser pulse output of short pulse width.Also can flexible adjusting negative dispersion compensation amount, energy loss is low, and structure is flexible.
The present invention realizes through following technical proposals: a kind of many logical pulse shorteners; Should many logical pulse shorteners identical by structure, by the coaxial relative placement of concave spherical surface of concave spherical mirror the first end mirror I and the second end mirror II constitute, described each end mirror comprises circular bearing, on a side anchor ring of circular bearing, disposes swivel becket; On the opposite side anchor ring of circular bearing, be provided with and regulate swivel becket rotates ± 2.5 ° around the x of horizontal fore-and-aft direction axle vernier adjustment knob; And regulate the vernier adjustment knob of swivel becket around ± 2.5 ° of vertical z axle rotations, it is characterized in that swivel becket is 0 to 360 ° around the angle that the y of horizontal left and right directions axle rotates; Be equipped with concave spherical mirror on the swivel becket; The minute surface diameter phi of concave spherical mirror is 30～100mm, and radius of curvature R is 1～20m, and thickness D is 5～10mm; Offer a penetrating groove on the concave spherical mirror; The penetrating well width b circumferential along minute surface is 4～10mm, and penetrating slot length a radially is 12～40mm along minute surface, the equal plating dispersion compensation of the concave spherical surface film system of the first end mirror concave spherical mirror 1 and the second end mirror concave spherical mirror 2; Perhaps the concave spherical surface plating dispersion compensation film at the first end mirror concave spherical mirror 1 is, and at the concave spherical surface plating highly reflecting films of the second end mirror concave spherical mirror 2 is; Perhaps the concave spherical surface plating highly reflecting films at the first end mirror concave spherical mirror 1 are, and at the concave spherical surface plating dispersion compensation film of the second end mirror concave spherical mirror 2 are.
The method of application of the how logical pulse shortener of said structure is characterized in that comprising following process:
1) with the first end mirror I and the second end mirror II by in the coaxial relatively light path that is placed on pulse to be compressed of the concave spherical surface of the concave spherical mirror on it; And the concave spherical surface spacing L that guarantees two concave spherical mirrors is less than 2～40m, and promptly the concave spherical surface spacing of two concave spherical mirrors is less than their radius-of-curvature sum;
2) adopt a completely reflecting mirror to regulate pulsed light beam to be compressed; Pulsed light beam to be compressed is incident on the second end mirror concave spherical mirror 2 through the penetrating groove of the first end mirror concave spherical mirror 1; And guarantee that the angle between incident beam and the first end mirror I and the second end mirror II coaxial is 0 °; Regulate the vernier adjustment knob 8 and 10 of the second end mirror II then; The light beam that the second end mirror concave spherical mirror 2 is returned drops on the first end mirror concave spherical mirror 1; Then regulate the vernier adjustment knob 7 and 9 on the first end mirror I again, the light beam that the first end mirror concave spherical mirror 1 is returned drops on the second end mirror concave spherical mirror 2 again, so regulates the vernier adjustment knob 7 and 9 of first end mirror repeatedly; The light beam that the first end mirror concave spherical mirror 1 is returned drops on the second end mirror concave spherical mirror 2; With the vernier adjustment knob 8 and 10 of regulating second end mirror, the light beam that the second end mirror concave spherical mirror 2 is returned drops on the first end mirror concave spherical mirror 1, until being adjusted to till forming the spot tracks of closed circular on the concave spherical surface of the first end mirror concave spherical mirror 1 and on the concave spherical surface of the second end mirror concave spherical mirror 2; At the moment; Rotate the second end mirror swivel becket 6 and drive 2 rotations of the second end mirror concave spherical mirror, the feasible light beam that is returned by last hot spot of closed circular spot tracks on the first end mirror concave spherical mirror 1 is through the penetrating groove output on the second end mirror concave spherical mirror 2;
3) when accomplishing the adjusting of above-mentioned steps, the every primary event that is through the dispersion compensation film of the first end mirror concave spherical mirror 1 or the second end mirror concave spherical mirror 2 of light beam has just obtained corresponding single chromatic dispersion compensation quantity D
DMCorresponding compression effectiveness; Through rotating the second end mirror swivel becket 6; Make of the penetrating groove output of the diverse location of the closed circular spot tracks of light beam from the second end mirror concave spherical mirror 2 through the second end mirror concave spherical mirror 2, then each different outgoing position corresponding light beam different order of reflection (order of reflection can from the hot spot number Direct observation on the concave spherical mirror) in many logical pulse shorteners; When the first end mirror concave spherical mirror 1 and the second end mirror concave spherical mirror, 2 equal plating the single chromatic dispersion compensation quantity being arranged is D
DMDispersion compensation film when being, this device is with D
DMTwice be 2D
DMRealize the discrete adjustment of compression for the unit paired pulses; It is D that a concave spherical surface plating in the first end mirror concave spherical mirror 1 and the second end mirror concave spherical mirror 2 has the single chromatic dispersion compensation quantity
DMDispersion compensation film system and another plating highly reflecting films when being, this device is with D
DMRealize the discrete adjustment of compression for the unit paired pulses.
Technical scheme of the present invention has following advantage:
1. should many logical pulse shorteners when satisfying under the steady state conditions (promptly the concave spherical surface spacing of two concave spherical mirrors is less than their radius-of-curvature sum) use; The design of concave spherical mirror can make light beam every through the concave spherical mirror reflection once; The capital is assembled periodically again; This has just effectively suppressed the hot spot expansion that the intrinsic diffraction of light beam causes, has simplified the adjusting of light path simultaneously;
2. in many logical pulse shorteners, rotate the penetrating groove on the second end mirror concave spherical mirror through rotating the second end mirror swivel becket, and then regulate the flare number on the minute surface, realized that with the dispersion compensation film be individual reflection chromatic dispersion compensation quantity D
DMPerhaps twice chromatic dispersion compensation quantity 2D
DMFor the discrete dispersion compensation of unit is regulated;
With grating pair technology and prism to compared with techniques; Many logical pulse shorteners are not introduced the additional space chromatic dispersion; Do not need light beam of extra introducing device of climbing, only need pair of lenses can realize the compression of paired pulses, intrasystem number of elements still less; Therefore total system is simpler, and cost is cheaper;
4. with the grating pair compared with techniques; Because many logical pulse shorteners have adopted the design of multilayered medium dispersion compensation film system; The energy loss of its compression is very little, thereby can realize very high energy percent of pass, is suitable for obtaining high power, high-octane ultrashort pulse more;
5. with prism compensation technique is compared; When the minute surface spacing L of many logical pulse shorteners needs only less than two radius-of-curvature sums (being steady state conditions); This spacing L can choose flexibly; Need to compensation technique, must not introduce very long light path, compact, the low-loss ultrashort pulse compressor reducer of final realization as prism.
Description of drawings
Fig. 1 leads to the structural representation of pulse shortener more for the present invention.
Among the figure: I is first end mirror, and II is second end mirror; 1 is the first end mirror concave spherical mirror, and 2 is the second end mirror concave spherical mirror, and 3 is the circular bearing of first end mirror; 4 is the circular bearing of second end mirror, and 5 is the first end mirror swivel becket, and 6 is the second end mirror swivel becket; 7 are the knob of the fine setting first end mirror swivel becket around the rotation of x axle; 8 are the knob of the fine setting second end mirror swivel becket around the rotation of x axle, and 9 for finely tuning the knob that the first end mirror swivel becket rotates around the z axle, and 10 for finely tuning the knob that the second end mirror swivel becket rotates around the z axle.
Fig. 2 is the structural representation of the first end mirror concave spherical mirror 1 or the second end mirror concave spherical mirror 2 among Fig. 1.
Among the figure: b be penetrating groove along the circumferential width of minute surface, a is that penetrating groove is long along the minute surface radial slot, φ is the minute surface diameter of concave spherical mirror.
Fig. 3 is the left pseudosection of Fig. 2.
Among the figure: D is the thickness of concave spherical mirror, and R is the concave spherical surface radius-of-curvature of concave spherical mirror.
Fig. 4 is that light beam leads to the synoptic diagram of transmission locus in the pulse shortener in the present invention more.
Among the figure: L is the first end mirror concave spherical mirror 1 and the concave spherical surface spacing between the second end mirror concave spherical mirror 2 among Fig. 1.
Fig. 5 is the spacing L of two concave spherical mirrors when being 30cm, on the first end mirror concave spherical mirror minute surface, is formed the photo of closed circular spot tracks by 22 hot spots.
Fig. 6 is the spacing L of two concave spherical mirrors when being 20cm, on the first end mirror concave spherical mirror minute surface, is formed the photo of closed circular spot tracks by 22 hot spots.
Fig. 7 is the spacing L of two concave spherical mirrors when being 10cm, on the first end mirror concave spherical mirror minute surface, is formed the photo of closed circular spot tracks by 20 hot spots.
Embodiment
The specific embodiments that obtains many logical pulse shorteners is following: the minute surface diameter of choosing the first end mirror concave spherical mirror 1 and the second end mirror concave spherical mirror 2 is 50mm; The concave spherical surface radius-of-curvature is 2m; Thickness D is 6mm, and all to offer a width b on each concave spherical mirror be that 6mm, length a are the penetrating groove of 20mm.Equal plating has GT film system (a kind of dispersion compensation film is) on 1 and 2 the concave spherical surface, and it is tantalum oxide (Ta by one group of high-index material
2O
5), low-index material is fused quartz (SiO
2) the alternate formation of multilayer high and low refractive index rete, this film system is 99.99% for the individual reflection rate of 1030～1050nm wave band inner light beam, individual reflection chromatic dispersion compensation quantity D
DMFor-1500fs
2
Circular bearing 3 of first end mirror and the circular bearing 4 of second end mirror are fixed on the optical table; The concave spherical surface of concave spherical mirror of guaranteeing two end mirrors is with the coaxial relative placement of spacing L, and experimentation has selected for use L=30cm, 20cm and three kinds of spacings of 10cm to test respectively.Utilize a branch of centre wavelength of mirror reflects to be 1040nm, spectral width pulsed light beam to be compressed for 6nm; Light beam is incident on the second end mirror concave spherical mirror 2 through the penetrating groove of the first end mirror concave spherical mirror 1; And guarantee that the angle between incident beam and two end mirrors coaxial is 0 °; Regulate the vernier adjustment knob 8 and 10 on the circular bearing 4 of second end mirror again; The light beam that returns through the second end mirror concave spherical mirror 2 is dropped on the first end mirror concave spherical mirror 1; And continued is regulated the vernier adjustment knob 7 and 9 on the circular bearing 3 of first end mirror; Make the light beam return once more through the first end mirror concave spherical mirror 1 drop on the second end mirror concave spherical mirror 2, so regulate vernier adjustment knob 7,9 and the vernier adjustment knob 8,10 on the circular bearing 4 of second end mirror on the circular bearing 3 of first end mirror repeatedly, on the concave spherical mirror of two end mirrors, form the spot tracks of occluded ellipse ring-type as shown in Figure 5.
And the every process of light beam plating has the primary event of the concave spherical mirror of GT film system, has just obtained D
DM=-1500fs
2The corresponding compression effectiveness of chromatic dispersion compensation quantity.Rotate the second end mirror swivel becket 6 and drive 2 rotations of the second end mirror concave spherical mirror, the feasible light beam that is returned by last hot spot of closed circular spot tracks on the first end mirror concave spherical mirror 1 is through the penetrating groove output on the second end mirror concave spherical mirror 2.
Rotating the second end mirror swivel becket, 6 drives, the second end mirror concave spherical mirror 2 rotates around the y of horizontal left and right directions axle; Make light beam export through 2 penetrating groove from the diverse location on the closed circular spot tracks; Each diverse location corresponding light beam different order of reflection in many logical pulse shorteners; Promptly regulated the flare number on two concave spherical mirrors simultaneously, with single chromatic dispersion compensation quantity D
DM=-1500fs
2Twice 2D
DM=-3000fs
2Realize the discrete adjustment of compression for the unit paired pulses.Like this, light beam like Fig. 5 and shown in Figure 6, when the concave spherical surface spacing L of two concave spherical mirrors is respectively 30cm and 20cm, is adjusted to 22 hot spots of appearance on each eyeglass through after should leading to pulse shorteners more, and the efficient of this moment is (99.99%)
44=99.56%, it is 2 * 22 * (1500fs that pulse simultaneously can obtain value
2The 66000fs of)=-
2The corresponding compression effectiveness of negative dispersion compensation; As shown in Figure 7, when concave spherical surface spacing L is 10cm, be adjusted to 20 hot spots of appearance on each minute surface, the efficient of this moment is (99.99%)
40=99.60%, it is 2 * 20 * (1500fs that pulse simultaneously can obtain value
2The 60000fs of)=-
2The corresponding compression effectiveness of negative dispersion compensation.
Claims (2)
1. lead to pulse shortener one kind more; First end mirror (I) and second end mirror (II) formation of should many logical pulse shorteners identical, as press the concave spherical mirror coaxial relative placement of concave spherical surface by structure, described each end mirror comprises circular bearing, on a side anchor ring of circular bearing, disposes swivel becket; On the opposite side anchor ring of circular bearing, be provided with and regulate swivel becket rotates ± 2.5 ° around the x of horizontal fore-and-aft direction axle vernier adjustment knob; And regulate the vernier adjustment knob of swivel becket around ± 2.5 ° of vertical z axle rotations, it is characterized in that swivel becket is 0 to 360 ° around the angle that the y of horizontal left and right directions axle rotates; Be equipped with concave spherical mirror on the swivel becket; The minute surface diameter phi of concave spherical mirror is 30～100mm, and radius of curvature R is 1～20m, and thickness D is 5～10mm; Offer a penetrating groove on the concave spherical mirror; The penetrating well width b circumferential along minute surface is 4～10mm, and penetrating slot length a radially is 12～40mm along minute surface, and equal plating dispersion compensation film is on the concave spherical surface of the first end mirror concave spherical mirror (1) and the second end mirror concave spherical mirror (2); Perhaps plating dispersion compensation film is on the concave spherical surface of the first end mirror concave spherical mirror (1), and the plating highly reflecting films are on the concave spherical surface of the second end mirror concave spherical mirror (2); Perhaps the plating highly reflecting films are on the concave spherical surface of the first end mirror concave spherical mirror (1), and plating dispersion compensation film is on the concave spherical surface of the second end mirror concave spherical mirror (2).
2. press the described method of application of leading to pulse shorteners of claim 1 for one kind more, it is characterized in that comprising following process:
1) with first end mirror (I) and second end mirror (II) by in the coaxial relatively light path that is placed on pulse to be compressed of the concave spherical surface of the concave spherical mirror on it, and guarantee the radius-of-curvature sum of the concave spherical surface spacing L of two concave spherical mirrors less than them;
2) adopt a completely reflecting mirror to regulate pulsed light beam to be compressed; Pulsed light beam to be compressed is incident on the second end mirror concave spherical mirror through the penetrating groove of the first end mirror concave spherical mirror; And guarantee that the angle between incident beam and first end mirror and second end mirror coaxial is 0 °; Regulate the vernier adjustment knob on second end mirror then; The light beam that the second end mirror concave spherical mirror is returned drops on the first end mirror concave spherical mirror; Then regulate the vernier adjustment knob on first end mirror again, the light beam that the first end mirror concave spherical mirror is returned drops on the second end mirror concave spherical mirror again, so regulates the vernier adjustment knob of first end mirror repeatedly; The light beam that the first end mirror concave spherical mirror is returned drops on the second end mirror concave spherical mirror; With the vernier adjustment knob of regulating second end mirror, the light beam that the second end mirror concave spherical mirror is returned drops on the first end mirror concave spherical mirror, until being adjusted to till the hot spot on the concave spherical surface of the hot spot on the concave spherical surface of the first end mirror concave spherical mirror and the second end mirror concave spherical mirror forms the spot tracks of closed circular; At the moment; Rotate the second end mirror swivel becket and drive the rotation of the second end mirror concave spherical mirror, the feasible light beam that is returned by last hot spot of closed circular spot tracks on the first end mirror concave spherical mirror is through the penetrating groove output on the second end mirror concave spherical mirror;
3) when accomplishing the adjusting of above-mentioned steps, the every primary event that is through the dispersion compensation film of the first end mirror concave spherical mirror or the second end mirror concave spherical mirror of light beam has just obtained corresponding single chromatic dispersion compensation quantity D
DMCorresponding compression effectiveness; Through rotating the second end mirror swivel becket; Make the penetrating groove output of diverse location on the second end mirror concave spherical mirror of the closed circular spot tracks of light beam from the second end mirror concave spherical mirror, then each different outgoing position corresponding light beam different order of reflection in many logical pulse shorteners; When the first end mirror concave spherical mirror and the equal plating of the second end mirror concave spherical mirror single chromatic dispersion compensation quantity being arranged is D
DMDispersion compensation film when being, should many logical pulse shorteners be then with D
DMTwice be 2D
DMRealize the discrete adjustment of compression for the unit paired pulses; When the first end mirror concave spherical mirror and one of them concave spherical surface plating of the second end mirror concave spherical mirror single chromatic dispersion compensation quantity being arranged is D
DMDispersion compensation film system and another plating highly reflecting films when being, should many logical pulse shorteners be then with D
DMRealize the discrete adjustment of compression for the unit paired pulses.
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| CN104570379B (en) * | 2015-01-20 | 2017-07-18 | 中国科学院上海应用物理研究所 | A kind of reflection-type grating is to pulse stretcher device |
| CN104836106A (en) * | 2015-06-09 | 2015-08-12 | 福建福晶科技股份有限公司 | Miniature solid mode locked laser |
| CN105466855B (en) * | 2015-12-31 | 2018-11-30 | 力合科技（湖南）股份有限公司 | Sample detection means based on Herriott multiple reflecting pool |
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| JP2007109962A (en) * | 2005-10-14 | 2007-04-26 | Aisin Seiki Co Ltd | Laser pulse compression device |
| CN101504505A (en) * | 2009-03-16 | 2009-08-12 | 哈尔滨工业大学 | Modulation-eliminating stimulated Brillouin scattering laser pulse compression apparatus |
| CN101938081A (en) * | 2010-09-01 | 2011-01-05 | 天津大学 | MHz photonic crystal fiber ultra-short pulse laser based on multichannel pulse compressor |
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| US8068522B2 (en) * | 2004-06-24 | 2011-11-29 | Lawrence Livermore National Security, Llc | Hyper dispersion pulse compressor for chirped pulse amplification systems |
| JP3987554B2 (en) * | 2005-11-03 | 2007-10-10 | 光州科学技術院 | High repetition rate femtosecond playback amplifier |
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| JP2007109962A (en) * | 2005-10-14 | 2007-04-26 | Aisin Seiki Co Ltd | Laser pulse compression device |
| CN101504505A (en) * | 2009-03-16 | 2009-08-12 | 哈尔滨工业大学 | Modulation-eliminating stimulated Brillouin scattering laser pulse compression apparatus |
| CN101938081A (en) * | 2010-09-01 | 2011-01-05 | 天津大学 | MHz photonic crystal fiber ultra-short pulse laser based on multichannel pulse compressor |
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