CN104184032B - Novel pulse amplification device and method - Google Patents

Novel pulse amplification device and method Download PDF

Info

Publication number
CN104184032B
CN104184032B CN201410457001.9A CN201410457001A CN104184032B CN 104184032 B CN104184032 B CN 104184032B CN 201410457001 A CN201410457001 A CN 201410457001A CN 104184032 B CN104184032 B CN 104184032B
Authority
CN
China
Prior art keywords
phase
plate
plates
light beam
constant
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201410457001.9A
Other languages
Chinese (zh)
Other versions
CN104184032A (en
Inventor
李燕
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hebei University of Science and Technology
Original Assignee
Hebei University of Science and Technology
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hebei University of Science and Technology filed Critical Hebei University of Science and Technology
Priority to CN201410457001.9A priority Critical patent/CN104184032B/en
Publication of CN104184032A publication Critical patent/CN104184032A/en
Application granted granted Critical
Publication of CN104184032B publication Critical patent/CN104184032B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Landscapes

  • Lasers (AREA)

Abstract

Provided are a novel pulse amplification device and method. The novel pulse amplification device comprises an oscillator and an amplifier which are sequentially arranged on a light path. The novel pulse amplification device further comprises a first phase plate and a second phase plate, the first phase plate and the second phase plate are located on the two sides of the amplifier respectively, and the first phase plate and the second phase plate are identical in shape and size and are made of identical materials. If the centers of the phase plates are defined as coordinates of original points of the phase plates and coordinates of some point on the first phase plate are (x, y), the phase of the position of a light beam penetrating through the first phase plate is Phi1xy; for the same point (x, y) on the second phase plate, the phase of the position of the same light beam is Phi2xy; for all position points on the whole phase plates, Phi1xy plus Phi2xy equals to a constant. Each phase plate is a non-uniform phase plate, and the light beam perpendicularly penetrates through the two phase plates at the identical positions and in the identical ranges.

Description

A kind of new pulse amplifying device and amplification method
Technical field
The present invention relates to a kind of new chirped pulse amplification device, it is primarily related to particle high field experimental study, belong to In high-energy physics field.
Background technology
Just it is made up of the electric field and magnetic field of vibration mutually orthogonal in the plane vertical with its direction of propagation.The intensity of light It is proportional to square sum square with magnetic field of the electric field of composition light wave.It is concerned with because laser has fabulous room and time Property, so the many orders of magnitude bigger than the electric field of usual incoherent light source of the electric field in laser beam.It is now recognized that material is Subsection atom is molecular with the electricity around atom nuclear motion by atomic nucleus.Conventional atom physics research is to the effect that Behavior and property that in material, electronics shows under the electric field action of intratomic.In recent years, because ultrashort-pulse chirp amplifies The important breakthrough of (chirped pulse amplification) technology, current ultra-short pulse laser may be used after focusing on With the electric field that producing ratio intratomic electric field is much better than, so that the mankind have finally, and in material electricity can be thoroughly varied and controlled The motion of son simultaneously and then changes the ability of physical property and state.Intraatomic electric-field intensity is very big.Taking hydrogen atom as a example, The atom electric field intensity inside high that bound electron moves in hydrogen atom is up to 5*109How strong this electric field of V/ cm. have actually?Make Individual simply compare:In nature, the strength of lightning is huge, as powerful as a thunderbolt describes its power;But, lightning Produced electric field only just corresponds to 1/1000000th of intratomic electric field!If the intensity of atom internal electric field is used for accelerating electricity It is only necessary to electronics just can be accelerated to 5*10 by the acceleration distance of 10cm if son10The energy of eV, this is about as much as Many circles just obtainable energy is accelerated on the LEP accelerator of Geneva 27km girth.Big the arriving of electric field wanting to make laser can With compared with atom internal electric field, the light field 3*10 at least to be reached of laser16W/ cm2.This is for general long pulse (pulsewidth> 10-9S), for laser, it is a target being unable to reach.Just because of this reason, the mankind for material be better than former The research of the characteristics of motion in the electric field of sub- internal electric field is substantially a blank;And this situation changes now with huge Become.The important breakthrough of ultrashort-pulse chirp amplifying technique is so that laser intensity improves 5 to 6 orders of magnitude in recent years.This The focusing light intensity of new pattern laser is up to 1020W/ cm2, produced electric-field intensity is much larger than the internal electric field of atom, pulse chirp The general principle of amplifying technique is as shown in Fig. 1:From broadband ultrashort pulse (< 10-12S) oscillator sends Fig. 1 ultrashort laser arteries and veins Rush broadening-amplification-compression and obtain ultrashort laser pulse, it first passes through dispersion delay optical element (such as grating) and makes Its pulse width obtains 103To 105Broadening again, is then injected into being amplified in laser amplifier, as big as possible to obtain Energy.Because laser pulse now is very wide, so the laser pulse light intensity after amplifying is still below the destruction threshold of laser medium Value.After laser amplifier, then by a conjugation dispersion compensation optical element, the laser pulse recompression after amplifying Return to original pulse width.Can produce more than 10 after the Laser Focusing so producing20W/ cm2Light intensity.At present, Britain Rutherford experiment room, the laser aid of livermore national laboratory of Mel laboratory and the U.S. all has in France Such ability.The laser aid of China and other countries is also all among transformation.It should be noted that with amplification of warbling Technology exports bore, increases laser output way to improve laser compared with dependence expansion of laser light to the transformation of original laser aid The scheme of power come economical, worthwhile much.These broadly fall into known technology in prior art, and more specifically details can Referring to Zhang Jie's《The brand-new subject of Strong-field physics-》One literary composition.Just because of such importance of chirped pulse amplification, Countries in the world are also extremely enthusiastically for the research of chirped pulse amplification, occur in that various chirped pulse amplification devices, its The principle being adopted is all as noted above, what the stretcher employed in it and compressor reducer were adopted be all grating or Grating pair, grating or grating, to making relative complex, high cost, require less high occasion may be not appropriate for institute at some There is the selection of researcher, the present invention proposes a kind of amplifying device that can substitute above-mentioned stretcher and compressor reducer for this.
Content of the invention
The present invention is directed to problem above it is proposed that a kind of new chirped pulse amplification device.
The invention provides a kind of chirped pulse amplification device, including the oscillator setting gradually in light path and amplifier, It is characterized in that:Also include first phase plate and second phase plate, first phase plate and second phase plate separation amplifier both sides, This two phase-plates have same shape and size, and are formed by identical material manufacture, if with phase place The center of plate is defined as the origin of phase-plate, if the coordinate of certain point is on first phase plate(x,y), should for passing through For the light beam of phase-plate, the phase place at this is Φ 1xy, for identical point on second phase plate(x,y), for identical light For bundle, the phase place at this is Φ 2xy, then for all of location point for whole phase-plate, at two phase-plate same positions Phase place and be constant, namely Φ 1xy+ Φ 2xy=constant, and each phase-plate is all non-even phase plate, namely entirely Phase number on phase-plate can not be identical, and light beam is in vertical manner in identical position on two phase-plates Put with scope in pass through, first phase plate therein and second phase plate are fabricated by by translucent material, wherein each phase Position plate is all a platy structure, and including two sides, one of side is plane, and another one side is to have different height The face of degree convex cylinder, the height of two projections of two of which phase-plate same position and be constant, namely if by two Individual phase-plate have projection face staggered relatively and merge, then just can form an inside does not have any space rectangular Body because the height of two projections at two phase-plate same positions be consistent on whole phase-plate, they form One complementary structure.
According to one embodiment of present invention, described first phase plate is by identical material manufacture with second phase plate Glass, quartz or resin plate.
Brief description
Fig. 1 is the schematic diagram of chirped pulse amplification device in prior art;
Fig. 2 is the chirped pulse amplification schematic device of the present invention;
Fig. 3 shows phase place schematic diagram of the present invention.
Specific embodiment
On the basis of combining accompanying drawing, present disclosure is further described in more detail below.
Fig. 2 shows the schematic diagram of the device of high power laser of the present invention.Wherein 1 expression oscillator, 3 expression amplifiers, These broadly fall into prior art, and here is no longer described in detail.Wherein 2 and 4 is two phase-plates adopting in the present invention, this Two phase-plates are lived apart in the both sides of amplifier, are described in detail below for this two phase-plates, this two phase-plates There is same shape and size, and formed by identical material manufacture, if the center definition with phase-plate For the origin of phase-plate, wherein on phase-plate 2, the coordinate of certain point is(x,y), for the light beam through this phase place Phase place at this is Φ 1xy, point on phase-plate 4(x,y), for identical light beam, the phase place at this is Φ 2xy, then for For whole phase-plate, phase place at two phase-plate same positions and be constant, namely Φ 1xy+ Φ 2xy=constant, namely The phase place of two points at same coordinate on two phase-plates and constant, and each phase-plate is all non-even phase plate, I.e. the phase number on whole phase-plate can not be identical, and light beam is with vertical and identical on two phase-plates Position and scope in pass through, namely if light beam is radiated at scope on phase-plate 2 be(X1, y1)Arrive(X2, y2), then The scope being irradiated on phase-plate 4 should also be as(X1, y1)Arrive(X2, y2).
For two phase-plates, its heterogeneity is higher, then for the amplified energy upper limit improving whole amplifier Ability is stronger.For two phase-plates, its simply example can be two glass plates, and this two glass plates are by identical Material is constituted, so that this two glass plates meet above-mentioned phase condition, can simply the thickness of glass plate be adjusted System, for identical optical medium, phase place is thickness, as long as so making thickness and the guarantor of two glass plate same positions Hold as constant, such as first glass plate point(X1, y1)The thickness at place is 1, second glass plate point(X1, y1)The thickness at place can It is set to 2, first glass plate point(X2, y2)The thickness at place is 1.5, second glass plate point(X2, y2)Place thickness be 1.5, then just meet the requirement of 1+2=1.5+1.5=3, simultaneously by other phase place a little and all remain 3, and And each phase place is all made as non-homogeneous phase-plate, namely the thickness of whole phase-plate can not be identical.Meanwhile, in order to make Convenience on work, the phase place also being not required for when making on each point all changes, and can divide whole phase place For fenestral fabric, wherein each grid is a unit, and the phase place in this unit grids is constant, in this case, As long as ensureing on two phase-plates the phase place of two grids of same position and remaining constant.
Fig. 3 shows a pair of phase-plate of the present invention, wherein 2 and 4 one phase-plate of each expression, this two phase places Plate can be manufactured by arbitrary translucent material, for example the material such as quartz, glass, or resin, and wherein each phase-plate is all one Individual platy structure, including two sides, one of side is plane, and another one side is to have differing heights convex cylinder Face, the height of two projections of two of which phase-plate same position and be constant, namely if by two phase-plates The face with projection is staggered relatively and merge, then just form a rectangular structure, namely phase place as shown in Figure 3 Plate 2 and phase-plate 4, if two phase-plates are merged by mode as illustrated, then just can form an inside and not appoint What space cuboid because the height of two projections at two phase-plate same positions be consistent on whole phase-plate , they constitute a complementary structure.
Using the phase-plate of the present invention, first, after laser beam passes through first phase-plate i.e. to laser beam in space On phase place is modulated, because phase-plate is phase-plate heterogeneous, thus reducing the spatial coherence of laser beam(? Just because of this, the aperiodicity of phase-plate is stronger, and the spatial coherence that it brings reduces bigger), so that laser beam list Plane amasss the reduction of interior energy metric density, and works as light beam by after second phase-plate, at the phase point of two phase-plates Phase place and be constant, second phase-plate the phase modulation being caused by first phase-plate can be modulated again so that The space phase distribution of laser beam returns to initial coherent case, in this way, can replace original to a certain extent Stretcher and compressor reducer.
Also disclose the method according to said apparatus, including sequentially passing through by the pulse laser that oscillator exports simultaneously One phase-plate, amplifier, and second phase plate, this two phase-plates have same shape and size, and by complete Identical material manufacture forms, if being defined as the origin of phase-plate with the center of phase-plate, if on first phase plate Certain point coordinate be(x,y), for the light beam through this phase-plate, the phase place at this is Φ 1xy, for second phase Identical point on plate(x,y), for identical light beam, the phase place at this is Φ 2xy, then all of for whole phase-plate For location point, phase place at two phase-plate same positions and be constant, namely Φ 1xy+ Φ 2xy=constant, and each Phase-plate is all non-even phase plate, namely the phase number on whole phase-plate can not be identical, and light beam is in two phase places Pass through in identical position and scope in vertical manner on plate, first phase plate therein and second phase plate It is fabricated by by translucent material, wherein each phase-plate is all a platy structure, including two sides, one of side For plane, another one side is the face with differing heights convex cylinder, and two of two of which phase-plate same position convex The height of post and be constant, namely if by two phase-plates have projection face staggered relatively and merge, then just An inside can be formed does not have any space cuboid because the height of two projections at two phase-plate same positions and It is consistent on whole phase-plate, they constitute a complementary structure.

Claims (4)

1. a kind of chirped pulse amplification device, including the oscillator setting gradually in light path and amplifier it is characterised in that:Also wrap Include the both sides that first phase plate and second phase plate, wherein first phase plate and second phase plate are located at amplifier, and first Phase-plate is located between amplifier and oscillator, and this two phase-plates have same shape and size, and by complete Identical material manufacture forms, if being defined as the origin of phase-plate with the center of phase-plate, if on first phase plate The coordinate of certain point is (x, y), and the phase place for the light beam through this first phase plate it is assumed that at this is Φ 1xy, for Identical point (x, y) on second phase plate, it is assumed that phase place at this for the second phase plate is Φ 2xy for identical light beam, Then for all of location point for whole phase-plate, phase place at two phase-plate same positions and be constant, namely Φ 1xy + Φ 2xy=constant, and each phase-plate is all non-even phase plate, namely the phase number on whole phase-plate can not be complete Exactly the same, light beam passes through on two phase-plates in vertical manner in identical position and scope, therein First phase plate and second phase plate are fabricated by by translucent material, and wherein each phase-plate is all a platy structure, bag Include two sides, one of side is plane, and another one side is the face with differing heights convex cylinder, two of which The height of two projections of phase-plate same position and be constant, namely if the face phase with projection by two phase-plates To placing and merge, then just can form an inside does not have the cuboid in any space, because two phase-plate identical bits The height of two projections at the place of putting be consistent on whole phase-plate, they constitute a complementary structure.
2. chirped pulse amplification device according to claim 1 it is characterised in that:Described first phase plate and the second phase Position plate is that one or more of materials described below is fabricated by:Glass, quartz, resin.
3. a kind of chirped pulse amplification method it is characterised in that:First phase is sequentially passed through by the pulse laser that oscillator exports Plate, amplifier, and second phase plate, this two phase-plates have same shape and size, and by identical Material manufacture forms, if being defined as the origin of phase-plate with the center of phase-plate, if certain point on first phase plate Coordinate be (x, y), the phase place for the light beam through this first phase plate it is assumed that at this be Φ 1xy, for the second phase Identical point (x, y) on the plate of position, it is assumed that phase place at this for the second phase plate is Φ 2xy for identical light beam, then for For the whole all of location point of phase-plate, phase place at two phase-plate same positions and be constant, namely Φ 1xy+ Φ 2xy =constant, and each phase-plate is all non-even phase plate, namely the phase number on whole phase-plate can not be identical, Light beam passes through on two phase-plates in vertical manner in identical position and scope, first phase therein Plate and second phase plate are fabricated by by translucent material, and wherein each phase-plate is all a platy structure, including two sides Face, one of side is plane, and another one side is the face with differing heights convex cylinder, two of which phase-plate phase With position two projections height and be constant, namely if by two phase-plates have projection face staggered relatively simultaneously Merge, then just can form an inside does not have the cuboid in any space, because two at two phase-plate same positions The height of individual projection be consistent on whole phase-plate, they constitute a complementary structure.
4. chirped pulse amplification method according to claim 3 it is characterised in that:Described first phase plate and the second phase Position plate is that one or more of materials described below is fabricated by:Glass, quartz, resin.
CN201410457001.9A 2014-09-10 2014-09-10 Novel pulse amplification device and method Expired - Fee Related CN104184032B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410457001.9A CN104184032B (en) 2014-09-10 2014-09-10 Novel pulse amplification device and method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201410457001.9A CN104184032B (en) 2014-09-10 2014-09-10 Novel pulse amplification device and method

Publications (2)

Publication Number Publication Date
CN104184032A CN104184032A (en) 2014-12-03
CN104184032B true CN104184032B (en) 2017-02-15

Family

ID=51964882

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201410457001.9A Expired - Fee Related CN104184032B (en) 2014-09-10 2014-09-10 Novel pulse amplification device and method

Country Status (1)

Country Link
CN (1) CN104184032B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6920354B2 (en) 2017-01-26 2021-08-18 ギガフォトン株式会社 Laser system
CN108594561A (en) * 2018-06-19 2018-09-28 河北科技大学 A kind of laser amplification device
CN108808435B (en) * 2018-06-19 2020-07-28 河北科技大学 Laser amplification device driven by voltage

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101814689A (en) * 2010-04-08 2010-08-25 四川大学 Method for improving signal-to-noise ratio of femtosecond laser by using chirp matched optical parametric chirped pulse amplification
CN102771020A (en) * 2010-02-24 2012-11-07 爱尔康手术激光股份有限公司 High power femtosecond laser with adjustable repetition rate

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6873454B2 (en) * 2001-12-13 2005-03-29 The Regents Of The University Of California Hybrid chirped pulse amplification system
US20060050369A1 (en) * 2004-05-14 2006-03-09 Kafka James D Pulse width reduction for laser amplifiers and oscillators
US7508853B2 (en) * 2004-12-07 2009-03-24 Imra, America, Inc. Yb: and Nd: mode-locked oscillators and fiber systems incorporated in solid-state short pulse laser systems

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102771020A (en) * 2010-02-24 2012-11-07 爱尔康手术激光股份有限公司 High power femtosecond laser with adjustable repetition rate
CN101814689A (en) * 2010-04-08 2010-08-25 四川大学 Method for improving signal-to-noise ratio of femtosecond laser by using chirp matched optical parametric chirped pulse amplification

Also Published As

Publication number Publication date
CN104184032A (en) 2014-12-03

Similar Documents

Publication Publication Date Title
Jansen et al. Leveraging extreme laser-driven magnetic fields for gamma-ray generation and pair production
Arefiev et al. Enhanced proton acceleration in an applied longitudinal magnetic field
Vranic et al. Extremely intense laser-based electron acceleration in a plasma channel
CN104184032B (en) Novel pulse amplification device and method
Wu et al. Nonlinear coherent Thomson scattering from relativistic electron sheets<? format?> as a means to produce isolated ultrabright attosecond x-ray pulses
Shaw et al. Estimation of direct laser acceleration in laser wakefield accelerators using particle-in-cell simulations
Sharma et al. Spatiotemporal evolution of high-power relativistic laser pulses in electron-positron-ion plasmas
Mori et al. Transverse dynamics and energy tuning of fast electrons generated in sub-relativistic intensity laser pulse interaction with plasmas
Hu et al. Laser acceleration of electrons to giga-electron-volt energies using highly charged ions
Silvestre et al. A continuum approach for multipactor using Vlasov–Poisson analysis
Apsimon et al. Six-dimensional phase space preservation in a terahertz-driven multistage dielectric-lined rectangular waveguide accelerator
Samant et al. High brightness electron beams from density transition laser wakefield acceleration for short-wavelength free-electron lasers
Liu et al. Synchronous post-acceleration of laser-driven protons in helical coil targets by controlling the current dispersion
Horný et al. Short electron bunches generated by perpendicularly crossing laser pulses
Yoffe et al. Particle-in-cell simulation of plasma-based amplification using a moving window
Nie et al. Simulations of an energy dechirper based on dielectric lined waveguides
Wan et al. Colliding ionization injection in a plasma wakefield accelerator
Pae et al. Direct laser acceleration of electrons from a plasma mirror by an intense few-cycle Laguerre–Gaussian laser and its dependence on the carrier-envelope phase
Jiang et al. Divergence and direction control of laser-driven energetic proton beam using a disk-solenoid target
Li et al. Low-energy-spread laser wakefield acceleration using ionization injection with a tightly focused laser in a mismatched plasma channel
Walton et al. Measurements of magnetic field generation at ionization fronts from laser wakefield acceleration experiments
Franchetti et al. Incoherent effect of space charge and electron cloud
Noll et al. The particle-in-cell code bender and its application to non-relativistic beam transport
CN204045927U (en) A kind of Novel pulse amplifying device
CN204243449U (en) A kind of chirped pulse amplification device

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20170215

Termination date: 20170910