CN206378203U - A kind of spectrum phase interference device designed based on optical prism - Google Patents
A kind of spectrum phase interference device designed based on optical prism Download PDFInfo
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- CN206378203U CN206378203U CN201621316569.XU CN201621316569U CN206378203U CN 206378203 U CN206378203 U CN 206378203U CN 201621316569 U CN201621316569 U CN 201621316569U CN 206378203 U CN206378203 U CN 206378203U
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Abstract
The utility model provides a kind of spectrum phase interference device designed based on optical prism, completion is designed based on isosceles right-angle prism in the crucial optical element of most of its, avoid simultaneously in existing device and a large amount of of reflective optical devices are used, it enormously simplify the structure of whole device, and the two-dimension optical adjustment frame that use can cause light path to be vibrated can be reduced because isosceles right-angle prism is designed, so that there is higher stability and compactedness based on the device that isosceles right-angle prism is designed.
Description
Technical field
The utility model belongs to ultrafast optical techniques field, more particularly to a kind of spectrum phase designed based on optical prism
Interference device.
Background technology
Ultra Short Laser Pulse Technology in every field such as physics, chemistry, material, biomedicine, national defence, industrial processes
It is applied widely, during every field application Ultra Short Laser Pulse Technology, needs mostly to ultra-short pulse laser
Time/spectral characteristic is measured, therefore, and the e measurement technology of ultra-short pulse laser time/spectral characteristic is most important.
In existing various ps Pulse Measurement technologies, having a kind of conventional technological means is cut using traditional spectrum
Cut spectral phase interferometry for direct electrical reconstruction (SPIDER) technology of interference.The technology can measure the width of light pulse, shape
Shape and phase, its advantage is：Measurement is carried out in spectral domain, is not required to fast-response receiver；Any moving element is free of in device,
It is reliable and stable；Pass simple for algorithm, be conducive to high-repetition-rate to detect in real time.
Existing SPIDER technologies are for the complicated spectrum of shape matching, or the narrower spectrum of ultrashort pulse, measurement
Precision just it is poor.And existing device or system are often using many reflective optical devices so that device construction ratio
It is more complicated, and reduce the stability and compactedness of device.
Utility model content
The utility model provides a kind of spectrum phase interference device designed based on optical prism, it is intended to which solution is based on
The problem of stability and low compactedness of the spectrum phase interference device of SPIDER technologies.
In order to solve the above technical problems, the utility model provides a kind of spectrum phase interference designed based on optical prism
Device, described device includes：
First beam splitter, the type pulse disporsion device for producing chirped pulse, the first pulse delay line, for producing chirp arteries and veins
Rush to 50:50 non-polarizing beamsplitter, the second pulse delay line, the first 180 degree light path turning device, for realizing two step phase shifts
The broad band half wave piece of measurement, focus lamp, non-linear and frequency crystal, for adjusting and frequency pulse is to the 3rd arteries and veins of relative time-delay
Rush delay line, the second 180 degree light path turning device, the first prism reflector, the second prism reflector, condenser lens and for surveying
Measure the spectrometer of spectral interference ring；
The 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, first beam splitter, by the pulse separation to be measured of acquisition into reflected impulse and transmitted pulse, and will
The reflected impulse is exported to the first pulse delay line, and the transmitted pulse is exported to the type pulse disporsion device；
The first pulse delay line, for making the reflected impulse produce delay, and the reflected impulse being delayed is defeated
Go out to the focus lamp；
The type pulse disporsion device, is changed into chirped pulse, and export chirped pulse for entering line broadening to the transmitted pulse
To the non-polarizing beamsplitter；
The non-polarizing beamsplitter, for the chirped pulse to be divided into the first chirp subpulse and the sub- arteries and veins of the second chirp
Punching, and the first chirp subpulse is exported to the second pulse delay line, by the second chirp subpulse export to
The broad band half wave piece；
The second pulse delay line, the first chirp subpulse for making acquisition produces delay, and by be delayed the
One chirp subpulse is transmitted to the focus lamp；
The broad band half wave piece, for making the second chirp subpulse produce the spectral interference ring of relative π phase shifts, and will
Dephased second chirp subpulse is transmitted to the first 180 degree light path turning device；
The first 180 degree light path turning device, for the second chirp subpulse to be reflexed into focus lamp；
The focus lamp, for by the first chirp subpulse being delayed and the second chirp subpulse, with obtaining
The reflected impulse the being delayed convergence taken, and the pulse after convergence is incident to described non-linear and frequency crystal；
Described non-linear and frequency crystal, for the pulse after the convergence to be carried out and frequency processing, to generate first and frequency
Pulse and second and frequency pulse, and described first and frequency pulse are transmitted to first prism reflector, and by described second
Transmitted with frequency pulse to the 3rd pulse delay line；
First prism reflector, for described first and frequency pulse-echo to the second 180 degree light path to be turned back
Device；
The second 180 degree light path turning device, for described first and frequency pulse to be transmitted to the condenser lens；
The 3rd pulse delay line, for making described second and the delay of frequency pulses generation, and by the second He being delayed
Frequency pulse is transmitted to second prism reflector；
Second prism reflector, for by second and the frequency pulse-echo being delayed to the condenser lens；
The condenser lens, for described first and frequency pulse and second and the frequency pulse being delayed to be converged, and
Pulse after convergence is incident to the spectrometer；
The spectrometer, for the spectral interference loop data of incident pulse to be recorded.
Further, the spectrometer, for adjusting the broad band half wave piece, makes the inclined of the second chirp subpulse
When the quick shaft direction of direction and the broad band half wave piece of shaking is in parallel angle, the first spectral interference loop data is recorded；The light
Spectrometer, for adjusting the broad band half wave piece, makes the polarization direction of the second chirp subpulse and the broad band half wave piece
Quick shaft direction be in vertical angle when, record the second spectral interference loop data.
Further, first pulse-delay line is made up of two 180 ° of catadioptric microscope groups, one of them described 180 ° of folding
Anti- microscope group is placed on linear mobile translation stage；Each 180 ° of catadioptric microscope groups are described etc. comprising two isosceles right-angle prisms
The hypotenuse surface of waist right-angle prism is coated with 45 ° of high-reflecting films, and one of right angle proximal surface of two isosceles right-angle prisms
It is labelled in same reference plane.
Further, the type pulse disporsion device by the first isosceles right-angle prism and the second isosceles right-angle prism group into described
First isosceles right-angle prism is placed on linear translation platform；First isosceles right-angle prism and second isosceles right-angle prism
Inclined edge surfaces are coated with the broadband anti-reflection film for pulse.
Further, the non-polarizing beamsplitter is 50:The 50 unpolarized block prism beam splitter in broadband, it is described unpolarized
The chirped pulse is divided into the first chirp subpulse and the second chirp subpulse by beam splitter.
Further, the second pulse delay line is made up of the 3rd isosceles right-angle prism being placed on linear translation platform,
The broadband anti-reflection film near the incident pulse center wavelength to be measured of zero degree is coated with the inclined edge surfaces of 3rd isosceles right-angle prism；
The first 180 degree light path turning device is made up of the 4th isosceles right-angle prism, the inclined edge surfaces plating of the 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, the 3rd pulse delay line by the 6th isosceles right-angle prism group that is placed on linear translation platform into,
Be coated with the inclined edge surfaces of 6th isosceles right-angle prism zero degree it is incident and the broadband anti-reflection film near frequency pulse center wavelength；
The second 180 degree light path turning device is by the 5th isosceles right-angle prism group on the inclined edge surfaces of the 5th isosceles right-angle prism
Be coated with zero degree it is incident and the broadband anti-reflection film near frequency pulse center wavelength.
Further, first prism reflector and second prism reflector by isosceles right-angle prism group into,
And be coated with two right angle proximal surface for 45 ° of reflectance coatings with frequency pulse.
Compared with prior art, beneficial effect is the utility model：
Device provided by the utility model, most of its crucial optical element is designed based on isosceles right-angle prism
Complete, the use to reflective optical devices in existing device is substantially reduce the number, so as to enormously simplify the structure of whole device.
The two-dimension optical adjustment frame that use can cause light path to be vibrated can be reduced because isosceles right-angle prism is designed, so that being based on
The device of isosceles right-angle prism design has higher stability and compactedness.
Brief description of the drawings
Fig. 1 is the spectrum phase interference schematic device that the utility model embodiment is provided；
Fig. 2 is the first pulse delay line schematic diagram that the utility model embodiment is provided.
Embodiment
In order that the purpose of this utility model, technical scheme and advantage are more clearly understood, below in conjunction with accompanying drawing and implementation
Example, the utility model is further elaborated.It should be appreciated that specific embodiment described herein is only to explain
The utility model, is not used to limit the utility model.
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 tables
Show the first 180 degree light path turning device, SHG represents non-linear and frequency crystal, and 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 lens, and PM2 represents the second prism reflector,
SP represents spectrometer, and P3 represents the 3rd isosceles right-angle 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 represent speculum.
The utility model embodiment provides a kind of spectrum phase interference device designed based on optical prism, such as Fig. 1 institutes
Show, the device includes：
First beam splitter BS, the type pulse disporsion device Stretcher for producing chirped pulse, the first pulse delay line DL1,
50 for producing chirped pulse pair:50 non-polarizing beamsplitter NPS, the second pulse delay line DL2, the first 180 degree light path folding
Return device P4, the broad band half wave piece BHW for realizing two step phase-shift measurements, focus lamp FM, non-linear and frequency crystal SHG, for adjusting
Section and frequency pulse are anti-to the 3rd pulse delay line DL3, the second 180 degree light path turning device P5, the first prism of relative time-delay
Emitter PM1, the second prism reflector PM2, condenser lens Lens and the spectrometer 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
Spend 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, which can reduce use, to be caused
The two-dimension optical adjustment frame of light path vibration, so as to improve the stability of whole device so that the structure in whole device is more
It is compact.
The spectrum phase interference device that the present embodiment is provided, the transmitting procedure of spectrum in the apparatus is as follows：
First beam splitter BS, by the pulse separation to be measured of acquisition into 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 exported to poly- for making reflected impulse produce delay, and by the reflected impulse being delayed
Burnt mirror FM；
Type pulse disporsion device Stretcher, is changed into chirped pulse, and export chirped pulse for entering line broadening to transmitted pulse
To non-polarizing beamsplitter NPS；
Non-polarizing beamsplitter NPS, for above-mentioned chirped pulse to be divided into the first chirp subpulse and the second chirp subpulse,
And export the first chirp subpulse to the second pulse delay line DL2, the second chirp subpulse is exported to broad band half wave piece
BHW；
Second pulse delay line DL2, for making the first chirp subpulse of acquisition produce delay, and by be delayed first
Chirp subpulse is transmitted to focus lamp FM；
Broad band half wave piece BHW, for making the second chirp subpulse produce the spectral interference ring of relative π phase shifts, and by phase shift
The second chirp subpulse afterwards is transmitted to the first 180 degree light path turning device P4；
First 180 degree light path turning device P4, for the second chirp subpulse to be reflexed into focus lamp FM；
Focus lamp FM, for the first chirp subpulse and the second chirp subpulse that will be delayed and the delay obtained
Reflected impulse convergence, and the pulse after convergence is incident to non-linear and frequency crystal SHG；
Non-linear and frequency crystal SHG, for the pulse after above-mentioned convergence to be carried out and frequency processing, 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 the second 180 degree light path turning device P5；
Second 180 degree light path turning device P5, for first and frequency pulse to be transmitted to condenser lens Lens；
3rd pulse delay line DL3, for making second and the delay of frequency pulses generation, and by be delayed second and frequency pulse
Transmit to the second prism reflector PM2；
Second prism reflector PM2, for by be delayed second and frequency pulse-echo to condenser lens Lens；
Condenser lens Lens, for first and frequency pulse and second and the frequency pulse that have been delayed to be converged, and will be after convergence
Pulse be incident to spectrometer SP；
Spectrometer SP, for the spectral interference loop data of incident pulse to be recorded.
Further, spectrometer SP, except in regulation broad band half wave piece BHW, making the polarization of the second chirp subpulse
When direction and broad band half wave piece BHW quick shaft direction are in parallel angle, the first spectral interference loop data is recorded；Spectrometer SP,
It is additionally operable to, in regulation broad band half wave piece BHW, make the polarization direction of the second chirp subpulse and broad band half wave piece BHW quick shaft direction
During in vertical angle, the second spectral interference loop data is recorded.
Assuming that the first spectral interference loop data D that spectrometer SP is measured1Calculation formula it is 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.
Accordingly, the second spectral interference loop data D that spectrometer SP is measured2Calculation formula it is 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 phase of ultra-short pulse laser, calculation formula are then can obtain by Fourier transformation twice
It is 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 described 180 ° of folding
Anti- microscope group is placed on linear mobile translation stage；Each 180 ° of catadioptric microscope groups are described etc. comprising two isosceles right-angle prisms
The hypotenuse surface of waist right-angle prism is coated with 45 ° of high-reflecting films, and one of right angle proximal surface of two isosceles right-angle prisms
It is labelled in same reference plane.It should be noted that the first pulse delay as shown in Figure 2 provided by the utility model
Line, not only with the effect of pulse delay is made, also with while realizing the effect that light path is repeatedly turned back.Therefore, regulation two is passed through
One of them 180 ° of catadioptric microscope group of individual 180 ° of catadioptric microscope groups, can control light number of turns perpendicular to incident light direction translational movement,
I.e. the first pulse delay line DL1 can flexibly control the number of times that light is repeatedly turned back inside it, so that first pulse is prolonged
When line structure it is compacter, while having the flexible advantage of adjustment.
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 second isosceles right-angle prism P2 inclined edge surfaces
It is coated with the broadband anti-reflection film for pulse.Type pulse disporsion device Stretcher provided by the utility model incident light is general
It is incident with 0 degree of approximate angle.
Non-polarizing beamsplitter NPS is 50:The 50 unpolarized block prism beam splitter in broadband, non-polarizing beamsplitter NPS is by institute
State chirped pulse and be divided into the first chirp subpulse and the second chirp subpulse.It is provided by the utility model non-inclined
The beam splitter NPS that shakes is designed as block prism structure, is, for the incident pulse by non-polarizing beamsplitter NPS is incided, to be divided into
Two subpulses for being in equal proportions, and the polarization state of two subpulses and the polarization state of incident pulse are identical.
Second pulse delay line DL2 is made up of the 3rd isosceles right-angle prism P3 being placed on linear translation platform, the 3rd isosceles
The broadband anti-reflection film near the incident pulse center wavelength to be measured of zero degree is coated with right-angle prism P3 inclined edge surfaces.Need explanation
It is that isosceles right-angle prism is fixed on linear translation platform, it can be made to play a part of time delay line.Therefore, in this reality
In new, the 3rd isosceles right-angle prism P3 is fixed on linear translation platform so that its entirety constitutes a pulse delay
Device DL2, serves the effect of delay.Meanwhile, by translating the 3rd isosceles right-angle prism P3 in incident light direction, it can adjust
Light path.
Broad band half wave piece BHW is placed in chirped pulse light path in the utility model embodiment, therefore, to the broad band half wave
The bandwidth requirement of piece BHW phase controlling is relatively low, more conducively the control in following processes to π phase shifts.
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 right-angle prism P6 inclined edge surfaces zero degree it is incident and the broadband anti-reflection film near frequency pulse center wavelength.By isosceles right angle
Prism is fixed on linear translation platform, it can be made to play a part of time delay line.Therefore, in the utility model, by
Six isosceles right-angle prism P6 are fixed on linear translation platform so that its entirety constitutes a pulse delay unit DL3, serves and prolongs
When effect.It is coated with the inclined edge surfaces of 6th isosceles right-angle prism provided by the utility model for anti-reflection with frequency pulse
Film, is mainly used in regulation first and the relative time delay between frequency pulse and second and frequency pulse, so as to adjust following processes
The density degree for the spectral interference loop data that middle spectrometer recorded.
Second 180 degree light path turning device P5 is by the 5th isosceles right-angle prism group into the oblique of, the 5th isosceles right-angle prism
Be coated with the face of side zero degree it is incident and the broadband anti-reflection film near frequency pulse center wavelength.Second 180 degree light path turning device P5 is removed
It is used to turning back beyond transmission first and frequency pulse, is additionally operable to balance first and frequency pulse and second and the color of the light path of frequency pulse
Dissipate.
First prism reflector PM1 and the second prism reflector PM2 is by isosceles right-angle prism group into and two right angle
It is coated with for 45 ° of reflectance coatings with frequency pulse on proximal surface.
In addition, it is necessary to be also applied to several reflections as shown in M1 to M6 in explanation, the utility model embodiment
Mirror, for playing synergism in the apparatus, so that pulse-echo is not repeated in detail herein to relevant position.
In the emulation experiment of the present embodiment, when pulse to be measured is in 10 femtoseconds or so, the first beam splitter BS is to be measured by this
Pulse is divided into two beams, and reflected impulse is exported to the first pulse delay unit DL1, exported via DL1 to focus lamp FM, and transmitted pulse
Output to type pulse disporsion device Stretcher, transmitted pulse is the skin of time width about 5 by type pulse disporsion device Stretcher broadenings
The chirped pulse of second.The chirped pulse is divided into the first chirp subpulse and the second chirp subpulse after NPS.First Zhou
Subpulse of singing is transmitted to focus lamp FM, the second chirp subpulse warp via the isosceles right-angle prism P3 being placed on a linear translation platform
Transmitted by broad band half wave piece BHW and the first 180 degree light path turning device P4 to focus lamp FM.Focusing is used as with an off axis paraboloidal mirror
Mirror FM, focuses to non-linear and frequency crystal SHG, so as to produce first and frequency pulse and second by above three pulse together incidence
With frequency pulse.In this experiment, the non-linear and frequency crystal SHG is non-linear and frequency crystal, can be about tens microns with a thickness
β-bbocrystal, can use the first type-Ⅱphase matching, can also use the second type-Ⅱphase matching.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 by the isosceles right-angle prism P6 and PM2 by being placed on a linear translation platform, two and frequency pulse it is relative when
Between postpone about 400 femtoseconds.Finally, two and frequency pulse focused on by lens Lens at spectrometer SP entrance slit so that by light
Spectrometer is received.During measurement, broad band half wave piece BHW is adjusted so that the polarization direction of its incident pulse is parallel with the fast axle of wave plate, 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 spectrometer SP re-records the second spectral interference loop data.In this experiment, spectrometer 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 utility model passes through two step phases
Move the width spectral interference loop data of technical notes two so that DC quantity can be eliminated in conventional apparatus easily in data processing to exchange
Influence when the amount time intercepts, so as to bring the benefit of two aspects：First, when the shape of measured spectrum is more complicated, or
When the spectrum of the ultrashort pulse that person is measured is narrower, the time is wider, DC quantity can be effectively prevented from of ac in time-domain
It is overlapping, so as to effectively widen measurable range；Secondly, the AC compounent of selection does not rely on time window interception, but by two
The weighted subtraction for the spectral interference ring that the spectrometer of platform same performance is measured, can efficiently reduce the influence of noise.
In summary, the device that the utility model embodiment is provided, most of its crucial optical element is based on isosceles
Right-angle prism is designed completion, the use to reflective optical devices in existing device is substantially reduce the number, so as to greatly simplify
The structure of whole device.The two-dimension optical tune that use can cause light path to be vibrated can be reduced because isosceles right-angle prism is designed
Whole frame, so that there is higher stability and compactedness based on the device that isosceles right-angle prism is designed.
Preferred embodiment of the present utility model is the foregoing is only, it is all in this reality not to limit utility model
With any modifications, equivalent substitutions and improvements made within new spirit and principle etc., it should be included in of the present utility model
Within protection domain.
Claims (9)
1. a kind of spectrum phase interference device designed based on optical prism, it is characterised in that described device includes：
First beam splitter, the type pulse disporsion device for producing chirped pulse, the first pulse delay line, for producing chirped pulse pair
50:50 non-polarizing beamsplitter, the second pulse delay line, the first 180 degree light path turning device, for realizing two step phase-shift measurements
Broad band half wave piece, focus lamp, non-linear and frequency crystal, for adjust and threeth pulse of the frequency pulse to relative time-delay prolong
When line, the second 180 degree light path turning device, the first prism reflector, the second prism reflector, condenser lens and for measuring light
Compose the spectrometer of interference ring；
The 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：
First beam splitter, by the pulse separation to be measured of acquisition into reflected impulse and transmitted pulse, and by the reflected impulse
Output exports the transmitted pulse to the type pulse disporsion device to the first pulse delay line；
The first pulse delay line, for making the reflected impulse produce delay, and by the reflected impulse being delayed export to
The focus lamp；
The type pulse disporsion device, is changed into chirped pulse, and export chirped pulse to institute for entering line broadening to the transmitted pulse
State non-polarizing beamsplitter；
The non-polarizing beamsplitter, for the chirped pulse to be divided into the first chirp subpulse and the second chirp subpulse, and
The first chirp subpulse is exported to the second pulse delay line, the second chirp subpulse is exported to the width
Band half-wave plate；
The second pulse delay line, for making the first chirp subpulse of acquisition produce delay, and by the first Zhou being delayed
Subpulse of singing is transmitted to the focus lamp；
The broad band half wave piece, for making the second chirp subpulse produce the spectral interference ring of relative π phase shifts, and by phase shift
The second chirp subpulse afterwards is transmitted to the first 180 degree light path turning device；
The first 180 degree light path turning device, for the second chirp subpulse to be reflexed into focus lamp；
The focus lamp, for by the first chirp subpulse being delayed and the second chirp subpulse, with obtaining
The reflected impulse convergence being delayed, and the pulse after convergence is incident to described non-linear and frequency crystal；
Described non-linear and frequency crystal, for the pulse after the convergence to be carried out and frequency processing, to generate first and frequency pulse
With second and frequency pulse, and described first and frequency pulse are transmitted to first prism reflector, and by described second and frequency
Pulse is transmitted to the 3rd pulse delay line；
First prism reflector, for by described first and frequency pulse-echo to the second 180 degree light path turning device；
The second 180 degree light path turning device, for described first and frequency pulse to be transmitted to the condenser lens；
The 3rd pulse delay line, for making described second and the delay of frequency pulses generation, and by be delayed second and frequency arteries and veins
Punching is transmitted to second prism reflector；
Second prism reflector, for by second and the frequency pulse-echo being delayed to the condenser lens；
The condenser lens, for described first and frequency pulse and second and the frequency pulse being delayed to be converged, and will converge
Pulse after poly- is incident to the spectrometer；
The spectrometer, for the spectral interference loop data of incident pulse to be recorded.
3. device as claimed in claim 2, it is characterised in that：
The spectrometer, for adjusting the broad band half wave piece, make the polarization direction of the second chirp subpulse with it is described
When the quick shaft direction of broad band half wave piece is in parallel angle, the first spectral interference loop data is recorded；
The spectrometer, for adjusting the broad band half wave piece, make the polarization direction of the second chirp subpulse with it is described
When the quick shaft direction of broad band half wave piece is in vertical angle, the second spectral interference loop data is recorded.
4. device as claimed in claim 1 or 2, it is characterised in that first pulse-delay line is by two 180 ° of catadioptric mirrors
Group composition, one of them described 180 ° of catadioptric microscope group is placed on linear mobile translation stage；
Each 180 ° of catadioptric microscope groups are comprising two isosceles right-angle prisms, and the hypotenuse surface of the isosceles right-angle prism is plated
There are 45 ° of high-reflecting films, and one of right angle proximal surface of two isosceles right-angle prisms is labelled in same reference plane.
5. device as claimed in claim 1 or 2, it is characterised in that the type pulse disporsion device by the first isosceles right-angle prism and
Second isosceles right-angle prism group is into first isosceles right-angle prism is placed on linear translation platform；
The inclined edge surfaces of first isosceles right-angle prism and second isosceles right-angle prism are coated with the broadband increasing for pulse
Permeable membrane.
6. device as claimed in claim 2, it is characterised in that the non-polarizing beamsplitter is 50:50 broadband is unpolarized vertical
The chirped pulse is divided into the first chirp subpulse and described second by square glass prism beam splitter, the non-polarizing beamsplitter
Chirp subpulse.
7. device as claimed in claim 1 or 2, it is characterised in that the second pulse delay line is by being placed in linear translation platform
On the 3rd isosceles right-angle prism composition, the incident pulse to be measured of zero degree is coated with the inclined edge surfaces of the 3rd isosceles right-angle prism
Broadband anti-reflection film near centre wavelength；
The first 180 degree light path turning device is made up of the 4th isosceles right-angle prism, the hypotenuse of the 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, it is characterised in that the 3rd pulse delay line is by being placed in linear translation platform
On the 6th isosceles right-angle prism group into, be coated with the inclined edge surfaces of the 6th isosceles right-angle prism zero degree it is incident and frequency pulse
Broadband anti-reflection film near centre wavelength；
The second 180 degree light path turning device is by the 5th isosceles right-angle prism group into the hypotenuse of the 5th isosceles right-angle prism
Be coated with face zero degree it is incident and the broadband anti-reflection film near frequency pulse center wavelength.
9. device as claimed in claim 1 or 2, it is characterised in that first prism reflector and second prism are anti-
Emitter by isosceles right-angle prism group into, and be coated with two right angle proximal surface for and frequency pulse 45 ° of reflectance coatings.
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| CN201621316569.XU CN206378203U (en) | 2016-12-02 | 2016-12-02 | A kind of spectrum phase interference device designed based on optical prism |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106441583A (en) * | 2016-12-02 | 2017-02-22 | 深圳大学 | Spectral phase interference device and spectral interferometry system for reconstruction of ultrafast optical field |
| CN107678156A (en) * | 2017-10-23 | 2018-02-09 | 深圳市太赫兹科技创新研究院有限公司 | Optical texture and deferred mount |
-
2016
- 2016-12-02 CN CN201621316569.XU patent/CN206378203U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106441583A (en) * | 2016-12-02 | 2017-02-22 | 深圳大学 | Spectral phase interference device and spectral interferometry system for reconstruction of ultrafast optical field |
| CN107678156A (en) * | 2017-10-23 | 2018-02-09 | 深圳市太赫兹科技创新研究院有限公司 | Optical texture and deferred mount |
| WO2019080448A1 (en) * | 2017-10-23 | 2019-05-02 | 深圳市太赫兹科技创新研究院有限公司 | Optical structure and delay device |
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