CN103267581B - Be applicable to the spectrum shearing interferometer measuring shaped pulse - Google Patents
Be applicable to the spectrum shearing interferometer measuring shaped pulse Download PDFInfo
- Publication number
- CN103267581B CN103267581B CN201310183867.0A CN201310183867A CN103267581B CN 103267581 B CN103267581 B CN 103267581B CN 201310183867 A CN201310183867 A CN 201310183867A CN 103267581 B CN103267581 B CN 103267581B
- Authority
- CN
- China
- Prior art keywords
- pulse
- catoptron
- concave mirror
- slit
- spectrum
- 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
Links
- 238000001228 spectrum Methods 0.000 title claims abstract description 52
- 238000010008 shearing Methods 0.000 title claims abstract description 36
- 238000005259 measurement Methods 0.000 claims abstract description 12
- 239000013078 crystal Substances 0.000 claims description 28
- 230000008878 coupling Effects 0.000 claims description 25
- 238000010168 coupling process Methods 0.000 claims description 25
- 238000005859 coupling reaction Methods 0.000 claims description 25
- 238000013519 translation Methods 0.000 claims description 18
- 239000000203 mixture Substances 0.000 claims description 13
- 230000003595 spectral effect Effects 0.000 claims description 10
- 230000010287 polarization Effects 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 6
- 238000009826 distribution Methods 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 238000003786 synthesis reaction Methods 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 abstract description 18
- 239000006185 dispersion Substances 0.000 abstract description 14
- 239000003638 chemical reducing agent Substances 0.000 abstract description 13
- 239000012634 fragment Substances 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 16
- 230000008859 change Effects 0.000 description 11
- 238000007493 shaping process Methods 0.000 description 10
- 230000008569 process Effects 0.000 description 9
- 230000003287 optical effect Effects 0.000 description 5
- 230000009897 systematic effect Effects 0.000 description 4
- 238000001914 filtration Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000001427 coherent effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000012631 diagnostic technique Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- IXSZQYVWNJNRAL-UHFFFAOYSA-N etoxazole Chemical compound CCOC1=CC(C(C)(C)C)=CC=C1C1N=C(C=2C(=CC=CC=2F)F)OC1 IXSZQYVWNJNRAL-UHFFFAOYSA-N 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000011514 reflex Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Landscapes
- Spectrometry And Color Measurement (AREA)
Abstract
The present invention relates to shaped pulse fields of measurement, more specifically, relate to a kind of spectrum shearing interferometer being applicable to measure shaped pulse.The present invention adopts plane grating, the first concave mirror, double-slit baffle, the first catoptron and the second catoptron to form a special 4f zero dispersion compressor reducer, this 4f zero dispersion compressor reducer midplane grating, the first catoptron and second catoptron equal the focal distance f of the first concave mirror to the distance of the first concave mirror, obtain two monochromatic long pulses of standard by the mode that this 4f zero dispersion compressor reducer adds double-slit baffle, make it and pulse generation to be measured and frequency.This mode can be avoided shearing displacement Ω and participate in changing with the characteristic variations of pulse to be measured with the bandwidth δ ω of satellite pulse fragment frequently, shearing displacement Ω can be changed again easily to measure same pulse, and the phase differential that can independently solve corresponding to each frequency of pulse, thus can the shaped pulse of the various characteristic of Measurement accuracy.
Description
Technical field
The present invention relates to shaped pulse fields of measurement, more specifically, relate to a kind of spectrum shearing interferometer being applicable to measure shaped pulse.
Background technology
Femtosecond pulse shaping technique has important application in fields such as photochemistry, quantum coherent control, micro-imaging, optical communication, micro Process.Femtosecond pulse shaping technique, mainly based on fourier transform principle, utilizes spatial light modulator able to programme (SLM) to come intensity and the phase place of each spectral component of modulating pulse.Current pulse shaper mainly adopts liquid crystal type spatial light modulator, it can the intensity of each spectral component of separate modulation pulse and phase place, but it easily causes the sudden change of pulse spectrum and/or phase place, even easily synthesize the pulse that spectrum is divided into several sections, it is difficult to the shaped pulse being applied to Measurement accuracy complexity.
At present, complicated shaped pulse is measured, the following condition of general demand fulfillment: (1) independently should be able to solve the phase differential corresponding to each frequency of pulse; (2) two or more spectrum shearing displacement Ω should be able to be chosen easily to measure same shaped pulse, thus the details of energy accurate recreation impulse phase curve to be measured; (3) these two systematic parameters of bandwidth δ ω of shearing displacement Ω and participation and satellite pulse fragment frequently, should not change with the change of pulse characteristic to be measured in shaping pulse and real-time measuring process.
Although spectrum phase is concerned with, electric field Reconstruction Method (SPIDER) has become one of Diagnostic Techniques of Femtosecond Optical Pulses of main flow in the world, but traditional SPIDER system mostly adopts the mode of pulse to be measured and strong chirped pulse and frequency, shearing displacement Ω is caused to there is with the characteristic of pulse to be measured association with the bandwidth δ ω of satellite pulse fragment frequently with participating in.And have change in a big way due to the characteristic (particularly chirp value and pulse width) of the shaped pulse obtained in shaping pulse process, and spectrum and phase curve may compositions containing transition, thus utilize during the shaped pulse of traditional above-mentioned complexity of SPIDER systematic survey and just easily occur error, accuracy is low.That is, existing various SPIDER system has some limitations in measurement shaped pulse.
Summary of the invention
The present invention for overcoming at least one defect (deficiency) described in above-mentioned prior art, provide a kind of can reconstruct various shaping exactly after complicated ultrashort pulse be applicable to measure the spectrum shearing interferometer of shaped pulse.
For solving the problems of the technologies described above, technical scheme of the present invention is as follows:
Be applicable to measure the spectrum shearing interferometer of shaped pulse, comprise according to the beam splitter of pulse propagation path permutations to be measured, plane grating, the first concave mirror, double-slit baffle, the first catoptron, the second catoptron, the 3rd catoptron, corner cube mirror, the periscope of pulse polarization direction 90-degree rotation, centre can be established foraminate 4th catoptron, two classes couplings and crystal, spatial filter, grating spectrograph frequently; Described plane grating, the first catoptron, the second catoptron are equal to the focal length of the first concave mirror to the distance of the first concave mirror; Wherein, the travel path of pulse to be measured divides two-way to carry out:
The first via enters plane grating by beam splitter transmission, through plane grating, first concave mirror reflection enters double slit plate washer, two frequency differentiated quasi-monochromatic light spectrum compositions are formed by double slit plate washer, a quasi-monochromatic light spectrum composition is through the first catoptron, another quasi-monochromatic light spectrum composition is after the second catoptron, the top of former incident beam is reflexed to again through the first concave mirror and plane grating, the monochromatic long pulse of standard of synthesis two differing heights, the monochromatic long pulse of standard of two differing heights is through the 3rd catoptron, the non-orifice region of the 4th catoptron enters two class couplings and frequency crystal,
Secondary route beam splitter reflects, again through corner cube mirror, passing through can by the periscope of pulse polarization direction 90-degree rotation again, then enter two classes couplings through the 4th aperture in the middle of catoptron and frequently on crystal, the second road light beam is identical in the incoming position of two classes couplings and the incoming position frequently on crystal, time of incidence and the standard monochrome long pulse of two differing heights, time of incidence;
Two classes couplings and frequently on crystal pulse to be measured to occur with two standard monochromatic long pulses and frequency acts on simultaneously, generate that two spectral distribution stagger mutually with frequency pulse;
Three fundamental frequency pulses blocked through spatial filter from the light beam of two classes couplings and frequently crystal outgoing and allow two and pulse frequently pass through, two and pulse are frequently by being incident to grating spectrograph after spatial filter.
Plane grating in the present invention, the first concave mirror, double-slit baffle, the first catoptron and the second catoptron form a special 4f zero dispersion compressor reducer, this 4f zero dispersion compressor reducer midplane grating, the first catoptron and second catoptron equal the focal distance f of the first concave mirror to the distance of the first concave mirror, obtain two monochromatic long pulses of standard by the mode that this 4f zero dispersion compressor reducer adds double-slit baffle, make it and pulse generation to be measured and frequency.This mode can be avoided shearing displacement Ω and participate in changing with the characteristic variations of pulse to be measured with the bandwidth δ ω of satellite pulse fragment frequently, shearing displacement Ω can be changed again easily to measure same pulse, and the phase differential that can independently solve corresponding to each frequency of pulse, thus can the shaped pulse of the various characteristic of Measurement accuracy.
As a kind of preferred version, described double-slit baffle is a metal sheet, described metal sheet is provided with a long thin slit and one group short thin slit, choose long thin slit when pulse to be measured is incident to double-slit baffle and any short thin slit passes through, obtains two differentiated quasi-monochromatic lights of frequency and compose compositions.Shearing displacement Ω can be realized by upper and lower translation double-slit baffle.Due to the equivalent optical path of each spectral component of pulse to be measured roundtrip propagation in 4f zero dispersion compressor reducer, thus the operation of translation or replacing double-slit baffle, can not change travel path and the light path of final two the monochromatic long pulses of standard obtained, this pulse that can be systematic survey different qualities provides larger facility.
As further preferred version, the level interval between each short thin slit and long thin slit and vertical interval increase progressively successively.
As a kind of preferred version, also comprise the second concave mirror and the 5th catoptron, pulse to be measured and two monochromatic long pulses of standard also enter in two class couplings and frequency crystal respectively by the focusing of the second concave mirror and the reflection of the 5th catoptron after the 4th catoptron again.Owing to frequency efficiency being and square being directly proportional of light intensity, therefore by arranging the second concave mirror and the 5th catoptron focuses on light beam, improving the intensity of light intensity, thus guaranteeing and efficiency frequently.In addition, being arranged so that of second concave mirror and the 5th catoptron can focus on two classes couplings and crystal frequently well by the pulse to be measured of the 4th catoptron and two monochromatic long pulses of standard, guarantee that pulse to be measured is mated in two classes with two accurate monochromatic long pulses and overlaps in frequency crystal, namely guarantee that pulse to be measured and two accurate monochromatic long pulses can gather two classes and mate with in the same point of frequency crystal.
As further preferred version, also comprise spatial filter, three fundamental frequency pulses are blocked through this spatial filter and allow two and pulse frequently pass through by the light beam of two classes couplings and frequently crystal outgoing, and two and pulse are frequently by being incident to grating spectrograph after spatial filter.
As further preferred version, also comprise the 3rd concave mirror, the 6th catoptron and the 7th catoptron, two and the frequently pulse reflection also again through the 6th catoptron and the 7th catoptron after the 3rd concave mirror focuses on after spatial filter, finally enters grating spectrograph.
As a kind of preferred version, described grating spectrograph is built-in with area array CCD camera.
As a kind of preferred version, described double-slit baffle is arranged on accurate translation stage.
As a kind of preferred version, the first catoptron is arranged on accurate translation stage.
As a kind of preferred version, corner cube mirror is arranged on accurate translation stage.
Compared with prior art, the beneficial effect of technical solution of the present invention is:
The mode that the present invention adopts 4f zero dispersion compressor reducer to add double-slit baffle obtains two monochromatic long pulses of standard, makes it and pulse generation to be measured and frequency.This mode has the broader scope of application than existing SPIDER system, can be competent at the Measurement accuracy of the ultrashort pulse of various structure, there is the complicated pulse of some saltus steps comprising spectrum and phase place.Therefore, the present invention can as the Real-Time Monitoring instrument of pulse-shaping technique, be conducive to the dirigibility greatly improving pulse shaper, make it can the structure of indiscriminately ad. as one wishes regulating impulse to adapt to the needs of various practical application, the expansion that paired pulses shaping technique is applied will be played larger impetus by this.
Accompanying drawing explanation
Fig. 1 is a kind of structure principle chart being applicable to the spectrum shearing interferometer measuring shaped pulse in the present invention.
Fig. 2 is the structural representation of double-slit baffle in the present invention.
Fig. 3 is the spectrogram of the spectrogram of pulse to be measured in embody rule example of the present invention and two monochromatic long pulses of standard of production.
Fig. 4 is the two-dimentional interference spectum that in embody rule example of the present invention, two shearing displacements are corresponding respectively.
Fig. 5 is the shaped pulse spectrum phase curve reconstructing out in embody rule example of the present invention.
Embodiment
Accompanying drawing, only for exemplary illustration, can not be interpreted as the restriction to this patent;
In order to better the present embodiment is described, some parts of accompanying drawing have omission, zoom in or out, and do not represent the size of actual product;
To those skilled in the art, in accompanying drawing, some known features and explanation thereof may be omitted is understandable.
Below in conjunction with drawings and Examples, technical scheme of the present invention is described further.
Embodiment 1
As shown in Figure 1, a kind of spectrum shearing interferometer being applicable to measurement shaped pulse, comprise the beam splitter 1 according to pulse propagation path permutations to be measured, plane grating 2, first concave mirror 3, double-slit baffle 4, first catoptron 5, second catoptron 6, 3rd catoptron 7, corner cube mirror 8, can by the periscope 9 of pulse polarization direction 90-degree rotation, foraminate 4th catoptron 10 is established in centre, second concave mirror 11, 5th catoptron 12, two class couplings and frequently crystal 13, spatial filter 14, 3rd concave mirror 15, 6th catoptron 16, 7th catoptron 17, grating spectrograph 18,
Wherein, plane grating 2, first concave mirror 3, double-slit baffle 4, first catoptron 5, second catoptron 6 form a special 4f zero dispersion compressor reducer, and the distance of plane grating 2, first catoptron 5, second catoptron 6 to the first concave mirror 3 is equal to the focal distance f of the first concave mirror 3;
Wherein, grating spectrograph 18 is built-in with area array CCD camera;
Wherein, double-slit baffle 4, first catoptron 5, corner cube mirror 8 are arranged on accurate translation stage respectively.
Based on above-mentioned framework, the travel path of pulse to be measured divides two-way to carry out:
The first via enters plane grating 2 by beam splitter 1 transmission, enters double slit plate washer 4 through the reflection of plane grating 2, first concave mirror 3, forms two frequency differentiated quasi-monochromatic light spectrum compositions by double slit plate washer 4,
A quasi-monochromatic light spectrum composition after the second catoptron 6, then reflexes to the top of former incident beam through the first catoptron 5, another quasi-monochromatic light spectrum composition through the first concave mirror 3 and plane grating 2, the monochromatic long pulse of standard of synthesis two differing heights; Now, the spectrum of pulse to be measured is launched by plane grating 2, and the first concave mirror 3 focuses on the position of the first catoptron 5, second catoptron 6, utilizes the double-slit baffle 4 be placed on before the first catoptron 5, second catoptron 6 to choose accurate spectral component; The monochromatic long pulse of the standard of two differing heights through the non-orifice region of the 3rd catoptron 7, the 4th catoptron 10, then enters two classes couplings by the focusing of the second concave mirror 11 and the reflection of the 5th catoptron 12 and frequently in crystal 13 again;
Secondary route beam splitter 1 reflects, through corner cube mirror 8 reflection, passing through can by the periscope 9 of pulse polarization direction 90-degree rotation again, then through the aperture in the middle of the 4th catoptron 10, then enter two classes couplings by the focusing of the second concave mirror 11 and the reflection of the 5th catoptron 12 and frequently on crystal 13, the second road light beam is identical in the incoming position of two classes couplings and the incoming position frequently on crystal 13, time of incidence and the standard monochrome long pulse of two differing heights, time of incidence;
Two classes couplings and frequently on crystal 13 pulse to be measured to occur with two standard monochromatic long pulses and frequency acts on simultaneously, generate that two spectral distribution stagger mutually with frequency pulse;
Three fundamental frequency pulses and two and pulse is frequently included from the light beam of two class couplings and crystal 13 outgoing frequently, spatial filter 14 allows two to pass through with pulse frequently for blocking three fundamental frequency pulses, wherein, three fundamental frequency pulses refer to the pulse to be measured and two monochromatic long pulses of standard that are incident to two class couplings and frequency crystal 13.Therefore, by two of spatial filter 14 and the pulse frequently reflection again through the 6th catoptron 16 and the 7th catoptron 17 after the 3rd concave mirror 15 focuses on, grating spectrograph 18 is finally entered.
The present invention uses special 4f zero dispersion compressor reducer to produce two monochromatic long pulses of standard, then allows two monochromatic long pulses of standard and pulse generation Sum frequency generation to be measured, and then utilizes the two-dimentional interference spectum of two and pulse frequently, solves the phase structure of pulse to be measured.In the present invention, spectrum shearing displacement and these two important parameters of the monochromatic long pulse bandwidth of standard all determined by the double slit size in 4f zero dispersion compressor reducer, do not change with the width of pulse to be measured and the change of situation of warbling, and only need translation double-slit baffle can change shearing displacement to measure same pulse to be measured, thus can the details of accurate reproduction impulse phase structure to be measured, thus to the ultrashort pulse of multiple different structure characteristic (pulse width, situation etc. of warbling), there is stronger adaptability, be particularly useful for measuring baroque shaped pulse.
The spectrum shearing interferometer being applicable to measure shaped pulse of the present invention requires that pulse to be measured and two monochromatic long pulses of standard arrive two class couplings and the necessary strict conformance of light path during frequency crystal 13, and this strict conformance can by the relative position realization between adjustment all parts.
The mode that the present invention adopts 4f zero dispersion compressor reducer to add double-slit baffle obtains two monochromatic long pulses of standard, make it and pulse generation to be measured and frequency, the complicated ultrashort pulse after various shaping can be reconstructed in real time, exactly, comprise the complete information of pulse shape and phase structure.
Based on such scheme, the present invention filters fundamental frequency pulse by installation space filtrator, and what make finally to enter grating spectrograph 18 only has two and pulse frequently, eliminates the interference that fundamental frequency pulse reconstructs ultrashort pulse.
Based on such scheme, the present invention is provided with the second concave mirror 11 respectively, the 3rd concave mirror 15 converges light beam, and light beam is arrived in follow-up parts more effectively.
In specific implementation process, as shown in Figure 2, double-slit baffle is a metal sheet, metal sheet is provided with a long thin slit 41 and one group short thin slit 42, the width of all short thin slit in one group short thin slit 42 is equal, and the level interval between each short thin slit 42 and long thin slit 41 and vertical interval increase progressively successively; Choose long thin slit when pulse to be measured is incident to double-slit baffle and any short thin slit passes through, obtains two differentiated quasi-monochromatic lights of frequency and compose compositions.
The linear dispersion coefficient that the width of long thin slit 41 and short thin slit 42 and the concrete size of spacing will determine according to the focal length of the incisure density of plane grating and the first concave mirror designs; Spacing between each short thin slit 42 and long thin slit 41 gets simple and relatively prime integer ratio relationship, as 5/12, and 5/18.Double-slit baffle is arranged on accurate translation stage, two accurate individual color components can be chosen from the spectrum of pulse to be measured.The difference of the centre frequency of two accurate individual color components is spectrum shearing displacement Ω.Usually can prepare polylith seam wide different double-slit baffle, thus can according to the bandwidth δ ω of pulse to be measured select wherein one piece be fixed on accurate translation stage, to meet the requirement of accurate monochromatic pulses bandwidth δ ω≤Δ ω ///100.Change Ω by realizing in accurate translation stage upper and lower translation double-slit baffle.Due to the equivalent optical path of each spectral component of pulse roundtrip propagation in 4f zero dispersion compressor reducer, the thus operation of translation or replacing double-slit baffle, can not change travel path and the light path of final two the accurate monochromatic pulses obtained.This pulse that can be systematic survey different qualities provides larger facility.
Be applicable to based on of the present invention the spectrum shearing interferometer measuring shaped pulse, the present invention is as follows for concrete measuring process when measuring shaping surface layer:
(1) pulse to be measured is allowed to incide in the beam splitter 1 shown in Fig. 1 with horizontal polarization state;
(2) choose suitable double-slit baffle 4 according to the bandwidth δ ω of pulse to be measured, be arranged on accurate translation stage.Allow pulse spectrum incidence to be measured wherein one group of double slit, obtain two monochromatic long pulses of the slightly differentiated standard of frequency;
(3) carefully adjust the 4th catoptron 10, two monochromatic long pulses of standard that pulse to be measured and step (2) are obtained focus on two classes and mate and the same position on frequency crystal 13;
(4) regulate the accurate translation stage at the 5th catoptron 5 and corner cube mirror 8 place respectively, to adjust the relative time delay between pulse to be measured and two monochromatic long pulses of standard, make these three pulses arrive two class couplings and frequency crystal 13 simultaneously.At this moment two that generate reach maximal value with the intensity of pulse frequently;
(5) carefully regulate two and the incident light of pulse concentration frequently grating spectrograph 18, take the two-dimentional interference spectum of these two and pulse frequently with the area array CCD camera on grating spectrograph 18;
(6) spectrum of pulse to be measured and two monochromatic long pulses of standard is taken: a catoptron can be inserted between the 4th catoptron 10 and the second concave mirror 11, pulse to be measured and two monochromatic long pulses of standard are drawn and in lead-in light grating spectrograph 18, taken the spectrum of these three pulses respectively.The centre frequency of two monochromatic long pulse spectrum of standard is subtracted each other the value that can obtain shearing displacement Ω;
(7) change shearing displacement and measure same pulse: translation double-slit baffle 4 allows pulse spectrum by other one group of double slit, and then take the two-dimentional interference spectum of another width and pulse frequently.New Ω value is measured by the spectrum again taking two monochromatic long pulses of standard, and the spacing ratio relation between the slit also can organizing selected by slit and step (2) according to this calculates;
(8) reconstruct of impulse phase to be measured:
Two can be expressed as with the intensity distributions of the two-dimentional interference spectum of pulse frequently
, wherein
for needing the spectrum phase that solves poor, I represents light intensity, and E represents amplitude, and ω represents and pulsed frequency frequently, is a variable, can in late time data process will with frequency pulse frequency spectrum and pulse frequency spectrum corresponding conversion to be measured, K is that two bundles are poor with the wave vector of frequency light.Be that independent variable does Fourier Transform Filtering process to each frequencies omega with x, will obtain in k-space at a distance of three unimodal envelopes for K.Filtering process is carried out to three peak envelopes, selects the envelope of k=+K, then make inversefouriertransform.Argument θ is got to transformation results, θ=ΔΦ (ω)+Kx should be had.Deduct the Kx item corrected thus, the ΔΦ (ω) at this place can be obtained.Solve ΔΦ corresponding to each frequency (ω) value respectively, take then Ω as spaced series by them, Φ (ω) curve of pulse can be obtained.In conjunction with the curve of spectrum of the pulse to be measured of taking, the frequency domain representation formula of pulse can be obtained above.Just can obtain the time-domain representation formula of pulse through Fourier transform, thus obtain shape and the phase structure of pulse to be measured.
Wherein, correct Kx and can adopt and sound out the method for approaching: do above-mentioned Fourier filtering process respectively to same pulse two shearing displacements with frequency interference spectum, try to achieve respective argument.Set an exploration value Kx and substitute into this two arguments, thus obtain corresponding ΔΦ (ω) curve, then respectively the ΔΦ (ω) of correspondence is together in series, thus two Φ (ω) curves can be obtained.If these two Φ (ω) curves are also unequal, just adjustment exploration value
the size of x is approached gradually, until corresponding two shearing displacements and Φ (ω) curve that reconstructs out is identical, then at this moment
x value is corrected value.
The measuring method that the present invention measures shaped pulse is illustrated below in conjunction with an application example.
A femtosecond pulse exported by Ti∶Sapphire laser femto-second laser, its centre wavelength is 820nm, bandwidth Delta lambda=35nm.After shaping pulse, its spectrum is divided into two sections, and has two drops to be about the square saltus step of pi/2 in spectrum phase curve; Then the BK7 glass through one piece of thick 40mm makes it broadening.The optical system shown in Fig. 1 is introduced in this pulse measure.Take the spectral intensity distribution of this shaped pulse and the accurate monochromatic long pulse thereof obtained as shown in Figure 3.Two selected shearing displacements can be calculated from Fig. 3 and be respectively Ω 1=ω 2-ω 1=2 π * 1.6 THz and Ω 2=ω 3-ω 1=2 π * 10.4 THz.The two-dimentional interference spectum of these two shearing displacements difference correspondences as shown in Figure 4, can see the dislocation of the interference spectum striped caused by square phase hit.Fig. 5 is the spectrum phase curve (block curve) of this shaped pulse reconstructing out, and wherein, dotted line is the spectrogram of this shaped pulse.Utilize spectral intensity to distribute and spectrum phase curve, the full detail of this shaped pulse can be obtained.
The corresponding same or analogous parts of same or analogous label;
Describe in accompanying drawing position relationship for only for exemplary illustration, the restriction to this patent can not be interpreted as;
Obviously, the above embodiment of the present invention is only for example of the present invention is clearly described, and is not the restriction to embodiments of the present invention.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all embodiments.All any amendments done within the spirit and principles in the present invention, equivalent to replace and improvement etc., within the protection domain that all should be included in the claims in the present invention.
Claims (8)
1. one kind is applicable to the spectrum shearing interferometer measuring shaped pulse, it is characterized in that, comprise according to the beam splitter of pulse propagation path permutations to be measured, plane grating, the first concave mirror, double-slit baffle, the first catoptron, the second catoptron, the 3rd catoptron, corner cube mirror, the periscope of pulse polarization direction 90-degree rotation, centre can be established foraminate 4th catoptron, two classes couplings and crystal, spatial filter, grating spectrograph frequently; Described plane grating, the first catoptron, the second catoptron are equal to the focal length of the first concave mirror to the distance of the first concave mirror; Wherein, the travel path of pulse to be measured divides two-way to carry out:
The first via enters plane grating by beam splitter transmission, through plane grating, first concave mirror reflection enters double slit plate washer, two frequency differentiated quasi-monochromatic light spectrum compositions are formed by double slit plate washer, a quasi-monochromatic light spectrum composition is through the first catoptron, another quasi-monochromatic light spectrum composition is after the second catoptron, the top of former incident beam is reflexed to again through the first concave mirror and plane grating, the monochromatic long pulse of standard of synthesis two differing heights, the monochromatic long pulse of standard of two differing heights is through the 3rd catoptron, the non-orifice region of the 4th catoptron enters two class couplings and frequency crystal,
Secondary route beam splitter reflects, again through corner cube mirror, passing through can by the periscope of pulse polarization direction 90-degree rotation again, then enter two classes couplings through the 4th aperture in the middle of catoptron and frequently on crystal, the second road light beam is identical in the incoming position of two classes couplings and the incoming position frequently on crystal, time of incidence and the standard monochrome long pulse of two differing heights, time of incidence;
Two classes couplings and frequently on crystal pulse to be measured to occur with two standard monochromatic long pulses and frequency acts on simultaneously, generate that two spectral distribution stagger mutually with frequency pulse;
Three fundamental frequency pulses blocked through spatial filter from the light beam of two classes couplings and frequently crystal outgoing and allow two and pulse frequently pass through, two and pulse are frequently by being incident to grating spectrograph after spatial filter;
Described grating spectrograph is built-in with area array CCD camera.
2. the spectrum shearing interferometer being applicable to measurement shaped pulse according to claim 1, it is characterized in that, described double-slit baffle is a metal sheet, described metal sheet is provided with a long thin slit and one group short thin slit, choose long thin slit when pulse to be measured is incident to double-slit baffle and any short thin slit passes through, obtains two differentiated quasi-monochromatic lights of frequency and compose compositions.
3. the spectrum shearing interferometer being applicable to measurement shaped pulse according to claim 2, it is characterized in that, the width of all short thin slit in one group short thin slit is equal, and the level interval between each short thin slit and long thin slit and vertical interval increase progressively successively.
4. the spectrum shearing interferometer being applicable to measurement shaped pulse according to claim 1, it is characterized in that, also comprise the second concave mirror and the 5th catoptron, pulse to be measured and two monochromatic long pulses of standard also enter in two class couplings and frequency crystal respectively by the focusing of the second concave mirror and the reflection of the 5th catoptron after the 4th catoptron again.
5. the spectrum shearing interferometer being applicable to measurement shaped pulse according to claim 4, it is characterized in that, also comprise the 3rd concave mirror, the 6th catoptron and the 7th catoptron, two and the frequently pulse reflection also again through the 6th catoptron and the 7th catoptron after the 3rd concave mirror focuses on after spatial filter, finally enters grating spectrograph.
6. being applicable to according to any one of claim 1 to 5 measures the spectrum shearing interferometer of shaped pulse, and it is characterized in that, described double-slit baffle is arranged on accurate translation stage.
7. being applicable to according to any one of claim 1 to 5 measures the spectrum shearing interferometer of shaped pulse, and it is characterized in that, the first catoptron is arranged on accurate translation stage.
8. being applicable to according to any one of claim 1 to 5 measures the spectrum shearing interferometer of shaped pulse, and it is characterized in that, corner cube mirror is arranged on accurate translation stage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310183867.0A CN103267581B (en) | 2013-05-17 | 2013-05-17 | Be applicable to the spectrum shearing interferometer measuring shaped pulse |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310183867.0A CN103267581B (en) | 2013-05-17 | 2013-05-17 | Be applicable to the spectrum shearing interferometer measuring shaped pulse |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103267581A CN103267581A (en) | 2013-08-28 |
| CN103267581B true CN103267581B (en) | 2015-08-26 |
Family
ID=49011221
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310183867.0A Expired - Fee Related CN103267581B (en) | 2013-05-17 | 2013-05-17 | Be applicable to the spectrum shearing interferometer measuring shaped pulse |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103267581B (en) |
Families Citing this family (33)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103528499B (en) * | 2013-10-11 | 2015-03-11 | 哈尔滨工业大学 | Morphology compensation type double-optical-axis linear displacement laser interferometer calibration method and device |
| CN103528525B (en) * | 2013-10-11 | 2015-02-11 | 哈尔滨工业大学 | Three-optical axis compensation and air bath type linear displacement laser interferometer calibration method and device |
| CN103528510B (en) * | 2013-10-11 | 2015-02-11 | 哈尔滨工业大学 | Four-optical axis compensation and air bath type angular displacement laser interferometer calibration method and device |
| CN103499281B (en) * | 2013-10-11 | 2015-03-11 | 哈尔滨工业大学 | Method and device for calibrating four-optical-axis return and gas bath type linear displacement laser interferometer |
| CN103528503B (en) * | 2013-10-11 | 2015-03-11 | 哈尔滨工业大学 | Double-optical axis compensation and air bath type angular displacement laser interferometer calibration method and device |
| CN103528526B (en) * | 2013-10-11 | 2015-03-11 | 哈尔滨工业大学 | Morphology compensation type three-optical-axis linear displacement laser interferometer calibration method and device |
| CN103499285B (en) * | 2013-10-11 | 2015-02-11 | 哈尔滨工业大学 | Method and device for calibrating optically biaxial compensation and gas bath type linear displacement laser interferometer |
| CN103499283B (en) * | 2013-10-11 | 2015-02-11 | 哈尔滨工业大学 | Linear displacement laser interferometer calibration method and device based on two standard optical axes |
| CN103499289B (en) * | 2013-10-11 | 2015-03-11 | 哈尔滨工业大学 | Method and device for calibrating morphology compensation type four-optical-axis angular displacement laser interferometer |
| CN103499291B (en) * | 2013-10-11 | 2015-02-11 | 哈尔滨工业大学 | Calibration method and device of angular displacement laser interferometer based on four-standard-optical-axis gas bath |
| CN103499282B (en) * | 2013-10-11 | 2015-03-11 | 哈尔滨工业大学 | Calibration method and device for three-optical-axis return and air bath linear displacement laser interferometer |
| CN103528501B (en) * | 2013-10-11 | 2015-03-11 | 哈尔滨工业大学 | Linear displacement laser interferometer calibrating method and device based on four-standard light-axis gas bath |
| CN103499287B (en) * | 2013-10-11 | 2015-03-11 | 哈尔滨工业大学 | Linear displacement laser interferometer calibration method and device based on two-standard-optical-axis air bath |
| CN103499278B (en) * | 2013-10-11 | 2015-03-11 | 哈尔滨工业大学 | Method and device for calibrating morphology compensation type four-optical-axis linear displacement laser interferometer |
| CN103499288B (en) * | 2013-10-11 | 2015-03-11 | 哈尔滨工业大学 | Linear displacement laser interferometer calibration method and device based on three-standard-optical-axis air bath |
| CN103528509B (en) * | 2013-10-11 | 2015-02-11 | 哈尔滨工业大学 | Angular displacement laser interferometer calibrating method and device based on dual-standard optical axis gas bath |
| CN103499277B (en) * | 2013-10-11 | 2015-02-11 | 哈尔滨工业大学 | Angular displacement laser interferometer calibration method and device based on four standard optical axes |
| CN103499280B (en) * | 2013-10-11 | 2015-04-22 | 哈尔滨工业大学 | Reset compensation type three-optical-axis linear displacement laser interferometer calibration method and device |
| CN103528505B (en) * | 2013-10-11 | 2015-02-11 | 哈尔滨工业大学 | Four-optical axis compensation and air bath type linear displacement laser interferometer calibration method and device |
| CN103528502B (en) * | 2013-10-11 | 2015-03-11 | 哈尔滨工业大学 | Method and device for calibrating return compensation type double-optical-axis angular displacement laser interferometer |
| CN103499290B (en) * | 2013-10-11 | 2015-03-11 | 哈尔滨工业大学 | Method and device for calibrating optically biaxial return and gas bath type angular displacement laser interferometer |
| CN103499284B (en) * | 2013-10-11 | 2015-03-11 | 哈尔滨工业大学 | Method and device for calibrating optically biaxial return and gas bath type linear displacement laser interferometer |
| CN103499279B (en) * | 2013-10-11 | 2015-02-11 | 哈尔滨工业大学 | Linear displacement laser interferometer calibration method and device based on three standard optical axes |
| CN103528508B (en) * | 2013-10-11 | 2015-03-11 | 哈尔滨工业大学 | Morphology compensation type double-optical-axis angular displacement laser interferometer calibration method and device |
| CN103528504B (en) * | 2013-10-11 | 2015-03-11 | 哈尔滨工业大学 | Method and device for calibrating return compensation type four-optical-axis linear displacement laser interferometer |
| CN103499292B (en) * | 2013-10-11 | 2015-03-11 | 哈尔滨工业大学 | Angular displacement laser interferometer calibration method and device based on two standard optical axes |
| CN103528500B (en) * | 2013-10-11 | 2015-02-11 | 哈尔滨工业大学 | Linear displacement laser interferometer calibrating method and device based on four-standard optical axis |
| CN103528507B (en) * | 2013-10-11 | 2015-02-11 | 哈尔滨工业大学 | Method and device for calibrating return compensation type four-optical-axis angular displacement laser interferometer |
| CN103499286B (en) * | 2013-10-11 | 2015-03-11 | 哈尔滨工业大学 | Reset compensation type two-optical-axis linear displacement laser interferometer calibration method and device |
| CN103528506B (en) * | 2013-10-11 | 2015-03-11 | 哈尔滨工业大学 | Four-optical axis returning and air bath type angular displacement laser interferometer calibration method and device |
| CN104515470B (en) * | 2014-12-25 | 2017-07-14 | 中国科学院长春光学精密机械与物理研究所 | Holoscan exposes two-dimentional work bench displacement and deflection angle measurement light channel structure |
| CN106441583B (en) * | 2016-12-02 | 2018-03-27 | 深圳大学 | Spectrum phase interference device and the spectral interference measuring system for rebuilding ultrafast light field |
| CN113624392A (en) * | 2020-05-07 | 2021-11-09 | 中国科学院理化技术研究所 | Optical pressure sensor for deep sea pressure detection and pressure detection method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1554931A (en) * | 2003-12-26 | 2004-12-15 | 北京邮电大学 | Femot second level super short light pulse measuring method and device |
| CN1743818A (en) * | 2005-09-29 | 2006-03-08 | 中山大学 | Delayed controlled stripe-free spectrum phase interference pulse measuring method and its measuring device |
| US7038781B2 (en) * | 2003-10-01 | 2006-05-02 | Coherent, Inc. | Time correlation of ultrafast laser pulses |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3498141B2 (en) * | 2001-07-12 | 2004-02-16 | 株式会社デバイス・ナノテク・リサーチ・インスティチュート | Optical pulse evaluation method, optical pulse evaluation device, and optical communication system |
-
2013
- 2013-05-17 CN CN201310183867.0A patent/CN103267581B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7038781B2 (en) * | 2003-10-01 | 2006-05-02 | Coherent, Inc. | Time correlation of ultrafast laser pulses |
| CN1554931A (en) * | 2003-12-26 | 2004-12-15 | 北京邮电大学 | Femot second level super short light pulse measuring method and device |
| CN1743818A (en) * | 2005-09-29 | 2006-03-08 | 中山大学 | Delayed controlled stripe-free spectrum phase interference pulse measuring method and its measuring device |
Non-Patent Citations (1)
| Title |
|---|
| 大孔径静态干涉成像光谱仪中双通道Mach-Zehnder横向剪切干涉仪的设计;付强 等;《光谱学与光谱分析》;20120229;第32卷(第2期);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103267581A (en) | 2013-08-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103267581B (en) | Be applicable to the spectrum shearing interferometer measuring shaped pulse | |
| CN110186577B (en) | Information real-time measuring system of ultrafast light field | |
| CN103219638B (en) | A kind of super continuum source and coherent anti-stokes raman scattering imaging system | |
| CN106289526B (en) | Photon trajectory angular motion system for measuring quantity and method based on wave-front conversion method | |
| CN102636272B (en) | Femtosecond laser pulse measurement method based on transient grating effect and device | |
| Bennett et al. | Aberrations in temporal imaging | |
| CN111123560B (en) | Optical pulse modulation method and system based on multi-frequency acousto-optic modulation and grating diffraction | |
| CN101976016A (en) | Ultra-short pulse dispersion reshaping and amplitude division technology-based ultrahigh-speed optical imaging system and method | |
| CN104570545A (en) | All-optical tunable generation device of wide band linear frequency modulated signals | |
| CN103412470A (en) | Color holographic display system based on diffraction distance control and method thereof | |
| CN103887693A (en) | Ultrashort laser pulse femtosecond magnitude delay synchronization method | |
| CN115235618B (en) | Single-frame measurement system and method for three-dimensional space-time distribution of ultrafast laser field | |
| EP2828938A1 (en) | Adaptive optics for combined pulse front and phase front control | |
| CN204831550U (en) | Spectral imaging device that polarization state acquireed in step | |
| CN102255225B (en) | Independent chirp parameter regulating system for realizing two-tone laser field | |
| CN107505055A (en) | Minimize linear pattern femto-second laser pulse shape width of measuring device | |
| CN103439767B (en) | A kind of programmable optical fiber mode stimulation and coupling process | |
| CN100432643C (en) | Femtosecond laser camera | |
| CN102279555B (en) | There is the interferometer system can carrying out imaging with polychromatic radiation of space carrier frequency | |
| CN207586561U (en) | Phase recovery system based on light intensity transmission measurement calculation | |
| CN108107020B (en) | Device and method for measuring nonlinear refractive index coefficient of material | |
| CN102778301B (en) | Real-time measuring device of self-reference spectrum interference femtosecond laser pulse | |
| Neyra et al. | Simple interferometric setup enabling sub-Fourier-scale ultra-short laser pulses | |
| Lin et al. | Wavefront control of subcycle vortex pulses via carrier-envelope-phase tailoring | |
| CN108061605B (en) | Minimize total-reflection type femto-second laser pulse form measuring instrument |
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: 20150826 Termination date: 20170517 |