CN106441583A - Spectral phase interference device and spectral interferometry system for reconstruction of ultrafast optical field - Google Patents
Spectral phase interference device and spectral interferometry system for reconstruction of ultrafast optical field Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/28—Investigating the spectrum
- G01J3/45—Interferometric spectrometry
Abstract
The invention provides a spectral phase interference device and a spectral interferometry system for reconstruction of an ultrafast optical field. The spectral phase interference device and the spectral interferometry system have the advantages that most of key optical elements are designed based on an isosceles right-angle prism, and excessive use of reflective optical elements in existing devices are avoided, so that the device is simplified structurally greatly; owing to the isosceles right-angle prism design, two-dimensional optical stages capable of leading to vibration of optical paths can be reduced, so that the device or the system designed based on the isosceles right-angle prism is higher in stability and compactness.
Description
Technical field
The invention belongs to ultrafast optical techniques field, more particularly, to spectrum phase interference device and the light rebuilding ultrafast light field
Spectrum interferometer measuration system.
Background technology
Ultra Short Laser Pulse Technology is in every field such as physics, chemistry, material, biomedicine, national defence, industrial processes all
It is applied widely, during every field application Ultra Short Laser Pulse Technology, mostly need to ultra-short pulse laser
Time/spectral characteristic measures, and therefore, the e measurement technology of ultra-short pulse laser time/spectral characteristic is most important.
In existing various ps Pulse Measurement technology, a kind of conventional technological means are had to be to cut using traditional spectrum
Cut spectral phase interferometry for direct electrical reconstruction (SPIDER) technology of interference.This technology can measure the width of light pulse, shape
Shape and phase place, its advantage is：Measurement is carried out in spectral domain, is not required to fast-response receptor；Any moving element is not contained in device,
Reliable and stable；Pass simple for algorithm, be conducive to high-repetition-rate real-time detection.
Existing SPIDER technology is for the complicated spectrum of shape matching, or the spectrum that ultrashort pulse is narrower, measurement
Precision just poor.And existing device or system often using many reflective optical devices so that system construction ratio
More complicated, and reduce stability and the compactedness of system.
Content of the invention
The present invention provides the spectral interference measuring system of a kind of spectrum phase interference device and the ultrafast light field of reconstruction it is intended to solve
The certainly stability of spectrum phase interference device based on SPIDER technology and the low problem of compactedness.
For solving above-mentioned technical problem, the invention provides a kind of spectrum phase interference device, described device includes：
First beam splitter, for producing the type pulse disporsion device of chirped pulse, the first pulse delay line, arteries and veins of warbling for generation
Punching to 50:50 non-polarizing beamsplitter, the second pulse delay line, the first 180 degree light path turning device, it is used for realizing two step phase shifts
The broad band half wave piece of measurement, focus lamp, non-linear and frequency crystal, the 3rd arteries and veins to relative time-delay for regulation and frequency pulse
Rush delay line, the second 180 degree light path turning device, the first prism reflector, the second prism reflector, condenser lenses and be used for surveying
The spectrogrph of amount spectral interference ring；
Described type pulse disporsion device, the first pulse delay line, the second pulse delay line, the first 180 degree light path turning device, the 3rd
Pulse delay line, the second 180 degree light path turning device, the first prism reflector and the second prism reflector are based on isosceles right angle
Prism is designed.
Further, described first beam splitter, the pulse separation to be measured obtaining is become reflected impulse and transmitted pulse, and will
Described reflected impulse exports to described first pulse delay line, and described transmitted pulse is exported to described type pulse disporsion device；
Described first pulse delay line, is used for making described reflected impulse produce time delay, and will be defeated for the reflected impulse of time delay
Go out to described focus lamp；
Described type pulse disporsion device, is changed into chirped pulse for entering line broadening to described transmitted pulse, and exports chirped pulse
To described non-polarizing beamsplitter；
Described non-polarizing beamsplitter, warbles sub- arteries and veins for described chirped pulse is divided into the first subpulse and second of warbling
Punching, and the described first subpulse of warbling is exported to described second pulse delay line, by described second warble subpulse export to
Described broad band half wave piece；
Described second pulse delay line, the subpulse of warbling of first for making acquisition produces time delay, and the by time delay
One subpulse of warbling transmits to described focus lamp；
Described broad band half wave piece, for making the described second subpulse of warbling produce the spectral interference ring of relatively π phase shift, and will
Dephased second subpulse of warbling transmits to described first 180 degree light path turning device；
Described first 180 degree light path turning device, for reflexing to focus lamp by the described second subpulse of warbling；
Described focus lamp, for warbling subpulse and obtaining the first of described time delay the subpulse and described second of warbling
The reflected impulse of the time delay taking converges, and the pulse after converging is incident to described non-linear and frequency crystal；
Described non-linear and frequency crystal, for carrying out the pulse after described convergence and frequency is processed, to generate first and frequency
Pulse and second and frequency pulse, and described first and frequency pulse are transmitted to described first prism reflector, and by described second
Transmit to described 3rd pulse delay line with frequency pulse；
Described first prism reflector, for turning back described first and frequency pulse-echo to described second 180 degree light path
Device；
Described second 180 degree light path turning device, for transmitting described first and frequency pulse to described condenser lenses；
Described 3rd pulse delay line, is used for making described second and frequency pulses generation time delay, and the second He by time delay
Frequency pulse is transmitted to described second prism reflector；
Described second prism reflector, for by the second of described time delay and frequency pulse-echo to described condenser lenses；
Described condenser lenses, for second and the frequency pulse of described first and frequency pulse and described time delay are converged, and
Pulse after converging is incident to described spectrogrph；
Described spectrogrph, for by the spectral interference loop data record of incident pulse.
Further, described spectrogrph, for adjusting described broad band half wave piece, makes described second to warble the inclined of subpulse
When the quick shaft direction of direction and described broad band half wave piece of shaking is in parallel angle, record the first spectral interference loop data；Described light
Spectrometer, for adjusting described broad band half wave piece, making the described second polarization direction and described broad band half wave piece warbling subpulse
Quick shaft direction when being in vertical angle, record the second spectral interference loop data.
Further, described first pulse-delay line is made up of two 180 ° of catadioptric microscope groups, one of described 180 ° of foldings
Anti- microscope group is placed in and linearly moves on translation stage；Each described 180 ° of catadioptric microscope group all comprises two isosceles right-angle prisms, described etc.
The hypotenuse surface of waist corner cube prism is all coated with 45 ° of high-reflecting films, and one of right angle proximal surface of two described isosceles right-angle prisms
All it is labelled on same datum level.
Further, described type pulse disporsion device is become by the first isosceles right-angle prism and the second isosceles right-angle prism group, described
First isosceles right-angle prism is placed on linear translation platform；Described first isosceles right-angle prism and described second isosceles right-angle prism
Inclined edge surfaces are all coated with the broadband anti-reflection film for pulse.
Further, described non-polarizing beamsplitter is 50:50 broadband unpolarized block prism beam splitter, described unpolarized
Described chirped pulse is divided into the described first subpulse of warbling and warbles subpulse with described second by beam splitter.
Further, described second pulse delay line is made up of the third class waist corner cube prism being placed on linear translation platform,
Broadband anti-reflection film near the incident pulse center wavelength to be measured of zero degree is coated with the inclined edge surfaces of described third class waist corner cube prism；
Described first 180 degree light path turning device is made up of the 4th isosceles right-angle prism, the inclined edge surfaces plating of described 4th isosceles right-angle prism
There is the broadband anti-reflection film near the incident pulse center wavelength to be measured of zero degree.
Further, described 3rd pulse delay line is become by the 6th isosceles right-angle prism group being placed on linear translation platform,
Be coated with the inclined edge surfaces of described 6th isosceles right-angle prism zero degree incident and the broadband anti-reflection film near frequency pulse center wavelength；
Described second 180 degree light path turning device is become by the 5th isosceles right-angle prism group, on the inclined edge surfaces of described 5th isosceles right-angle prism
Be coated with zero degree incident and the broadband anti-reflection film near frequency pulse center wavelength.
Further, described first prism reflector is become by isosceles right-angle prism group with described second prism reflector,
And be all coated with for 45 ° of reflectance coatings with frequency pulse on two right angle proximal surface.
Present invention also offers a kind of spectral interference of the ultrafast light field of reconstruction including above-mentioned spectrum phase interference device is surveyed
Amount system.
The present invention compared with prior art, has the beneficial effects that：
Device provided by the present invention or system, its crucial optical element great majority is set based on isosceles right-angle prism
Count into, substantially reduce the number the use to reflective optical devices in existing device, thus enormously simplify the knot of whole device
Structure.Because isosceles right-angle prism design can reduce the two-dimension optical adjustment frame that use can cause light path vibration, so that
Device based on isosceles right-angle prism design or system have higher stability and compactedness.
Brief description
Fig. 1 is spectrum phase interference schematic device provided in an embodiment of the present invention；
Fig. 2 is the first pulse delay line schematic diagram provided in an embodiment of the present invention.
Specific embodiment
In order that the objects, technical solutions and advantages of the present invention become more apparent, below in conjunction with drawings and Examples, right
The present invention is further elaborated.It should be appreciated that specific embodiment described herein is only in order to explain the present invention, and
It is not used in the restriction present invention.
As shown in figure 1, BS represents the first beam splitter, DL1 represents pulse delay line, and Stretcher represents type pulse disporsion device,
FM represents focus lamp, and NPS represents non-polarizing beamsplitter, and BHW represents broad band half wave piece, and DL2 represents the second pulse delay line, P4 table
Show the first 180 degree light path turning device, SHG represents non-linear and frequency crystal, PM1 represents the first prism reflector, and DL3 represents the 3rd
Pulse delay line, P5 represents the second 180 degree light path turning device, and Lens represents condenser lenses, and PM2 represents the second prism reflector,
SP represents spectrogrph, and P3 represents third class waist corner cube prism, and P6 represents the 6th isosceles right-angle prism, and P1 represents the first isosceles right angle
Prism, P2 represents the second isosceles right-angle prism, M1 M2 M3 M4 M5 M6 all represent reflecting mirror.
First embodiment of the invention provides a kind of spectrum phase interference device, as shown in figure 1, this device includes：
First beam splitter BS, for produce the type pulse disporsion device Stretcher of chirped pulse, the first pulse delay line DL1,
For producing the 50 of chirped pulse pair:50 non-polarizing beamsplitter NPS, the second pulse delay line DL2, the first 180 degree light path folding
Return device P4, for realizing the broad band half wave piece BHW of two step phase-shift measurements, focus lamp FM, non-linear and frequency crystal SHG, being used for adjusting
Section and frequency pulse are anti-to the 3rd pulse delay line DL3 of relative time-delay, the second 180 degree light path turning device P5, the first prism
Emitter PM1, the second prism reflector PM2, condenser lenses Lens and the spectrogrph SP for measure spectrum interference ring；
Wherein, type pulse disporsion device Stretcher, the first pulse delay line DL1, the second pulse delay line DL2, the 1st
Degree light path turning device P4, the 3rd pulse delay line DL3, the second 180 degree light path turning device P5, the first prism reflector PM1 and
Second prism reflector PM2 is based on isosceles right-angle prism and is designed.Isosceles right-angle prism can reduce use and can cause
Light path vibration two-dimension optical adjustment frame, thus improve whole device stability so that the structure in whole device more
Compact.
The spectrum phase interference device that the present embodiment is provided, spectrum transmitting procedure in the apparatus is as follows：
First beam splitter BS, the pulse separation to be measured obtaining is become reflected impulse and transmitted pulse, and reflected impulse is defeated
Go out to the first pulse delay line DL1, transmitted pulse is exported to type pulse disporsion device Stretcher；
First pulse delay line DL1, is used for making reflected impulse to produce time delay, and the reflected impulse of time delay is exported to poly-
Burnt mirror FM；
Type pulse disporsion device Stretcher, is changed into chirped pulse for entering line broadening to transmitted pulse, and exports chirped pulse
To non-polarizing beamsplitter NPS；
Non-polarizing beamsplitter NPS, warbles subpulse for above-mentioned chirped pulse is divided into the first subpulse and second of warbling,
And export the first subpulse of warbling to the second pulse delay line DL2, the second subpulse of warbling is exported to broad band half wave piece
BHW；
Second pulse delay line DL2, the subpulse of warbling of first for making acquisition produces time delay, and first by time delay
Subpulse of warbling transmits to focus lamp FM；
Broad band half wave piece BHW, for making the second subpulse of warbling produce the spectral interference ring of relatively π phase shift, and by phase shift
The subpulse of warbling of second afterwards transmits to the first 180 degree light path turning device P4；
First 180 degree light path turning device P4, for reflexing to focus lamp FM by the second subpulse of warbling；
Focus lamp FM, for by the first of time delay warble subpulse and second warble subpulse and obtain time delay
Reflected impulse converge, and the pulse after converging is incident to non-linear and frequency crystal SHG；
Non-linear and frequency crystal SHG, for carrying out the pulse after above-mentioned convergence and frequency is processed, to generate first and frequency arteries and veins
Punching and second and frequency pulse, and first and frequency pulse are transmitted to the first prism reflector PM1, and second and frequency pulse are transmitted
To the 3rd pulse delay line DL3；
First prism reflector PM1, for by first and frequency pulse-echo to described second 180 degree light path turning device P5；
Second 180 degree light path turning device P5, for transmitting first and frequency pulse to condenser lenses Lens；
3rd pulse delay line DL3, is used for making second and frequency pulses generation time delay, and by the second of time delay and frequency pulse
Transmit to the second prism reflector PM2；
Second prism reflector PM2, for by the second of time delay and frequency pulse-echo to condenser lenses Lens；
Condenser lenses Lens, for converging second and the frequency pulse of first and frequency pulse and time delay, and after converging
Pulse be incident to spectrogrph SP；
Spectrogrph SP, for by the spectral interference loop data record of incident pulse.
Further, spectrogrph SP, except for adjusting broad band half wave piece BHW, making the second polarization warbling subpulse
When the quick shaft direction of direction and broad band half wave piece BHW is in parallel angle, record the first spectral interference loop data；Spectrogrph SP,
It is additionally operable to adjusting broad band half wave piece BHW, make second to warble the polarization direction of subpulse and the quick shaft direction of broad band half wave piece BHW
When being in vertical angle, record the second spectral interference loop data.
Assume the first spectral interference loop data D that spectrogrph SP measures1Computing formula as follows：
D1=| E1(ω)|2+|E2(ω-Ω)|2+2|E1(ω)E2(ω-Ω)|cos[ωτ+ψ(ω)-ψ(ω-Ω)]
Wherein, E represents electric field, and τ represents the time delay between first and frequency pulse and second and frequency pulse, and Ω represents
Center frequency difference between one and frequency pulse and second and frequency pulse, ψ represents phase place.
Accordingly, the second spectral interference loop data D that spectrogrph SP measures2Computing formula then as follows：
D2=| E1(ω)|2+|E2(ω-Ω)|2-2|E1(ω)E2(ω-Ω)|cos[ωτ+ψ(ω)-ψ(ω-Ω)]
Time (spectrum) amplitude and the phase place of ultra-short pulse laser, computing formula is then can get by Fourier transformation twice
As follows：
D1-D2=4 | E1(ω)E2(ω-Ω)|cos[ωτ+ψ(ω)-ψ(ω-Ω)]
As shown in Fig. 2 the first pulse-delay line DL1 is made up of two 180 ° of catadioptric microscope groups, one of them 180 ° of catadioptric mirror
Group is placed in and linearly moves on translation stage；Each 180 ° of catadioptric microscope group all comprises two isosceles right-angle prisms, this isosceles right-angle prism
Hypotenuse surface be all coated with 45 ° of high-reflecting films, and one of right angle proximal surface of two isosceles right-angle prisms is all labelled in same base
On quasi- face.It should be noted that the first pulse delay line as shown in Figure 2 provided by the present invention, not only have and so that pulse is prolonged
When effect, also there is the effect simultaneously realizing that light path is repeatedly turned back.Therefore, by adjusting two 180 ° of catadioptric microscope groups wherein
Individual 180 ° of catadioptric microscope groups, can control light number of turns, i.e. the first pulse delay line DL1 energy perpendicular to incident light direction translational movement
Enough number of times flexibly controlling light repeatedly to turn back inside it, so that the structure of this first pulse delay line is compacter, with
When have adjustment flexible advantage.
Type pulse disporsion device Stretcher is made up of the first isosceles right-angle prism P1 and the second isosceles right-angle prism P2, and first
Isosceles right-angle prism P1 is placed on linear translation platform；First isosceles right-angle prism P1 and the inclined edge surfaces of the second isosceles right-angle prism P2
All it is coated with the broadband anti-reflection film for pulse.The incident illumination of type pulse disporsion device Stretcher provided by the present invention is typically with 0 degree
Approximate angle is incident.
Non-polarizing beamsplitter NPS is 50:50 broadband unpolarized block prism beam splitter, non-polarizing beamsplitter NPS is by institute
State chirped pulse and be divided into the described first subpulse of warbling and warble subpulse with described second.Unpolarized point provided by the present invention
Bundle device NPS is designed as block prism structure, is to will incide the incident pulse of this non-polarizing beamsplitter NPS, being divided into two
The subpulse being in equal proportions, and the polarization state of two subpulses is identical with the polarization state of incident pulse.
Second pulse delay line DL2 is made up of the third class waist corner cube prism P3 being placed on linear translation platform, third class waist
Broadband anti-reflection film near the incident pulse center wavelength to be measured of zero degree is coated with the inclined edge surfaces of corner cube prism P3.Need explanation
It is that isosceles right-angle prism is fixed on linear translation platform, it can be made to play the effect of time delay line.Therefore, at this
In bright, third class waist corner cube prism P3 is fixed on linear translation platform so that it integrally constitutes a pulse delay unit
DL2, serves the effect of time delay.Meanwhile, by translating this third class waist corner cube prism P3 in incident light direction, light can be adjusted
Journey.
In the embodiment of the present invention, broad band half wave piece BHW is placed in chirped pulse light path, therefore, to this broad band half wave piece
The bandwidth requirement of the phase controlling of BHW is relatively low, the control to π phase shift more conducively in following processes.
First 180 degree light path turning device P4 is made up of the 4th isosceles right-angle prism, the inclined edge surfaces of the 4th isosceles right-angle prism
It is coated with the broadband anti-reflection film near the incident pulse center wavelength to be measured of zero degree.
3rd pulse delay line DL3 is made up of the 6th isosceles right-angle prism P6 being placed on linear translation platform, the 6th isosceles
Be coated with the inclined edge surfaces of corner cube prism P6 zero degree incident and the broadband anti-reflection film near frequency pulse center wavelength.By isosceles right angle
Prism is fixed on linear translation platform, and it can be made to play the effect of time delay line.Therefore, in the present invention, by 6th etc.
Waist corner cube prism P6 is fixed on linear translation platform so that it integrally constitutes a pulse delay unit DL3, serves time delay
Effect.It is coated with for the anti-reflection film with frequency pulse on the inclined edge surfaces of the 6th isosceles right-angle prism provided by the present invention, main use
In adjusting the relative time time delay between first and frequency pulse and second and frequency pulse, thus adjusting spectrogrph note in following processes
The density degree of the spectral interference loop data recorded.
Second 180 degree light path turning device P5 is become by the 5th isosceles right-angle prism group, described 5th isosceles right-angle prism oblique
Be coated with the face of side zero degree incident and the broadband anti-reflection film near frequency pulse center wavelength.Second 180 degree light path turning device P5 removes
It is used for turning back beyond transmission first and frequency pulse, be additionally operable to balance the color of first and frequency pulse and second and the light path of frequency pulse
Dissipate.
First prism reflector PM1 is become by isosceles right-angle prism group with the second prism reflector PM2, and two right angle
All it is coated with for 45 ° of reflectance coatings with frequency pulse on proximal surface.
In addition, it is necessary to explanation, in the embodiment of the present invention, it has been also applied to several reflecting mirrors as shown in M1 to M6, used
In playing synergism in the apparatus, so that pulse-echo, to relevant position, does not repeat here in detail.
In the emulation experiment of the present embodiment, when pulse to be measured is about 10 femtoseconds, the first beam splitter BS is to be measured by this
Pulse is divided into two bundles, and reflected impulse exports to the first pulse delay unit DL1, exports to focus lamp FM via DL1, and transmitted pulse
Export to type pulse disporsion device Stretcher, this transmitted pulse is time width about 5 skin by type pulse disporsion device Stretcher broadening
The chirped pulse of second.This chirped pulse, after NPS, is divided into the first subpulse and second of warbling and warbles subpulse.First Zhou
Subpulse of singing transmits to focus lamp FM via the isosceles right-angle prism P3 being placed on a linear translation platform, and second warbles subpulse warp
Transmitted to focus lamp FM by broad band half wave piece BHW and the first 180 degree light path turning device P4.With an off axis paraboloidal mirror as focusing
Mirror FM, above three pulse together incidence is focused to non-linear and frequency crystal SHG, thus producing first and frequency pulse and second
With frequency pulse.In this experiment, this is non-linear and frequency crystal SHG is non-linear and frequency crystal, can use a thickness to be about tens microns
β-bbocrystal, the first type-Ⅱphase matching can be adopted, second type-Ⅱphase matching may also be employed.First and frequency pulse and the second He
The spectral shape of frequency pulse is similar, but about 2.5 nanometers of carrier deviation.First and frequency pulse then pass through PM1 and P5, and
Two and frequency pulse then through by isosceles right-angle prism P6 and PM2 being placed on a linear translation platform, two relative with frequency pulse when
Between postpone about 400 femtoseconds.Finally, two and frequency pulse focused at the entrance slit of spectrogrph SP by lens Lens, thus by light
Spectrometer receives.During measurement, adjust broad band half wave piece BHW so that the polarization direction of its incident pulse and the fast axle of wave plate are parallel, light
Spectrometer SP records the first spectral interference loop data；Then rotate broad band half wave piece BHW so that the polarization direction of its incident pulse with
The fast axle of wave plate is vertical, and spectrogrph SP re-records the second spectral interference loop data.In this experiment, spectrogrph SP is fiber spectrum
Instrument, spectral resolution is about 0.02 nanometer.
It should be noted that compared with prior art, spectral interference device provided by the present invention passes through two step phase shift skills
Art record two width spectral interference loop data is so that when eliminating in data processing that in conventional apparatus, DC quantity is to of ac easily
Between intercept when impact, thus bringing the benefit of two aspects：First, when the shape of measured spectrum is more complicated, or quilt
When the spectrum of the ultrashort pulse of measurement is narrower, the time is wider, DC quantity and weight in time domain for the of ac can be effectively prevented from
Folded, thus effectively widening measurable range；Secondly, the AC compounent of selection does not rely on time window and intercepts, but same by two
The weighted subtraction of the spectral interference ring that the spectrogrph of sample performance measures, can efficiently reduce effect of noise.
In sum, the device that first embodiment of the invention is provided, its crucial optical element great majority is based on isosceles
Corner cube prism is designed completing, and substantially reduce the number the use to reflective optical devices in existing device, thus greatly simplifying
The structure of whole device.The two-dimension optical of light path vibration can be caused to adjust because isosceles right-angle prism design can reduce use
Whole frame, so that the device based on isosceles right-angle prism design or system have higher stability and compactedness.
Second embodiment of the invention provides a kind of spectral interference measuring system rebuilding ultrafast light field, and described system includes
The all elements being comprised in above-mentioned spectrum phase interference device, and there is the work(that above-mentioned spectrum phase interference device has
Can, unknown plus repeat herein.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit invention, all spirit in the present invention
With any modification, equivalent and the improvement made within principle etc., should be included within the scope of the present invention.
Claims (10)
1. a kind of spectrum phase interference device is it is characterised in that described device includes：
First beam splitter, for producing the type pulse disporsion device of chirped pulse, the first pulse delay line, being used for producing chirped pulse pair
50:50 non-polarizing beamsplitter, the second pulse delay line, the first 180 degree light path turning device, it is used for realizing two step phase-shift measurements
Broad band half wave piece, focus lamp, non-linear and frequency crystal, for adjusting and frequency pulse is prolonged to the 3rd pulse of relative time-delay
When line, the second 180 degree light path turning device, the first prism reflector, the second prism reflector, condenser lenses and be used for measuring light
The spectrogrph of spectrum interference ring；
Described type pulse disporsion device, the first pulse delay line, the second pulse delay line, the first 180 degree light path turning device, the 3rd pulse
Delay line, the second 180 degree light path turning device, the first prism reflector and the second prism reflector are based on isosceles right-angle prism
It is designed.
2. device as claimed in claim 1 it is characterised in that：
Described first beam splitter, the pulse separation to be measured obtaining is become reflected impulse and transmitted pulse, and by described reflected impulse
Export to described first pulse delay line, described transmitted pulse is exported to described type pulse disporsion device；
Described first pulse delay line, is used for making described reflected impulse to produce time delay, and by the reflected impulse of time delay export to
Described focus lamp；
Described type pulse disporsion device, is changed into chirped pulse for entering line broadening to described transmitted pulse, and exports chirped pulse to institute
State non-polarizing beamsplitter；
Described non-polarizing beamsplitter, warbles subpulse for described chirped pulse is divided into the first subpulse and second of warbling, and
Described first subpulse of warbling is exported to described second pulse delay line, the described second subpulse of warbling is exported to described width
Band half-wave plate；
Described second pulse delay line, the subpulse of warbling of first for making acquisition produces time delay, and the Zhou by time delay
Subpulse of singing transmits to described focus lamp；
Described broad band half wave piece, for making the described second subpulse of warbling produce the spectral interference ring of relatively π phase shift, and by phase shift
The subpulse of warbling of second afterwards transmits to described first 180 degree light path turning device；
Described first 180 degree light path turning device, for reflexing to focus lamp by the described second subpulse of warbling；
Described focus lamp, for by the first of described time delay warble subpulse and described second warble subpulse and obtain
The reflected impulse of time delay converges, and the pulse after converging is incident to described non-linear and frequency crystal；
Described non-linear and frequency crystal, for carrying out the pulse after described convergence and frequency is processed, to generate first and frequency pulse
With second and frequency pulse, and described first and frequency pulse are transmitted to described first prism reflector, and by described second and frequency
Pulse is transmitted to described 3rd pulse delay line；
Described first prism reflector, for by described first and frequency pulse-echo to described second 180 degree light path turning device；
Described second 180 degree light path turning device, for transmitting described first and frequency pulse to described condenser lenses；
Described 3rd pulse delay line, is used for making described second and frequency pulses generation time delay, and by the second of time delay and frequency arteries and veins
Punching is transmitted to described second prism reflector；
Described second prism reflector, for by the second of described time delay and frequency pulse-echo to described condenser lenses；
Described condenser lenses, for converging second and the frequency pulse of described first and frequency pulse and described time delay, and will converge
Pulse after poly- is incident to described spectrogrph；
Described spectrogrph, for by the spectral interference loop data record of incident pulse.
3. device as claimed in claim 1 or 2 it is characterised in that：
Described spectrogrph, for adjust described broad band half wave piece, make described second warble subpulse polarization direction with described
When the quick shaft direction of broad band half wave piece is in parallel angle, record the first spectral interference loop data；
Described spectrogrph, for adjust described broad band half wave piece, make described second warble subpulse polarization direction with described
When the quick shaft direction of broad band half wave piece is in vertical angle, record the second spectral interference loop data.
4. device as claimed in claim 1 or 2 is it is characterised in that described first pulse-delay line is by two 180 ° of catadioptric mirrors
Group composition, one of described 180 ° of catadioptric microscope groups are placed in and linearly move on translation stage；
Each described 180 ° of catadioptric microscope group all comprises two isosceles right-angle prisms, and the hypotenuse surface of described isosceles right-angle prism all plates
There are 45 ° of high-reflecting films, and one of right angle proximal surface of two described isosceles right-angle prisms is all labelled on same datum level.
5. device as claimed in claim 1 or 2 it is characterised in that described type pulse disporsion device by the first isosceles right-angle prism and
Second isosceles right-angle prism group becomes, and described first isosceles right-angle prism is placed on linear translation platform；
Described first isosceles right-angle prism is all coated with the broadband increasing for pulse with the inclined edge surfaces of described second isosceles right-angle prism
Permeable membrane.
6. device as claimed in claim 1 or 2 is it is characterised in that described non-polarizing beamsplitter is 50:50 broadband is unpolarized
Block prism beam splitter, described chirped pulse is divided into described first and warbles subpulse and described the by described non-polarizing beamsplitter
Two warble subpulse.
7. device as claimed in claim 1 or 2 is it is characterised in that described second pulse delay line is by being placed in linear translation platform
On third class waist corner cube prism composition, the inclined edge surfaces of described third class waist corner cube prism are coated with the incident pulse to be measured of zero degree
Broadband anti-reflection film near centre wavelength；
Described first 180 degree light path turning device is made up of the 4th isosceles right-angle prism, the hypotenuse of described 4th isosceles right-angle prism
Face is coated with the broadband anti-reflection film near the incident pulse center wavelength to be measured of zero degree.
8. device as claimed in claim 1 or 2 is it is characterised in that described 3rd pulse delay line is by being placed in linear translation platform
On the 6th isosceles right-angle prism group become, the inclined edge surfaces of described 6th isosceles right-angle prism are coated with zero degree incident and frequency pulse
Broadband anti-reflection film near centre wavelength；
Described second 180 degree light path turning device is become by the 5th isosceles right-angle prism group, the hypotenuse of described 5th isosceles right-angle prism
Be coated with face zero degree incident and the broadband anti-reflection film near frequency pulse center wavelength.
9. device as claimed in claim 1 or 2 is it is characterised in that described first prism reflector is anti-with described second prism
Emitter is become by isosceles right-angle prism group, and is all coated with for 45 ° of reflectance coatings with frequency pulse on two right angle proximal surface.
10. a kind of spectral interference measuring system rebuilding ultrafast light field is it is characterised in that described system is included as claim 1-
Spectrum phase interference device any one of 9.
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