CN2293817Y - Single-pulse self-correlation measuring instrument - Google Patents
Single-pulse self-correlation measuring instrument Download PDFInfo
- Publication number
- CN2293817Y CN2293817Y CN 97242755 CN97242755U CN2293817Y CN 2293817 Y CN2293817 Y CN 2293817Y CN 97242755 CN97242755 CN 97242755 CN 97242755 U CN97242755 U CN 97242755U CN 2293817 Y CN2293817 Y CN 2293817Y
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- CN
- China
- Prior art keywords
- catoptron
- light beam
- crystal
- incident
- lamina membranacea
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Abstract
The utility model relates to a single-pulse self-correlation measuring instrument which is mainly suitable for the measurement of strong laser pulse width parameters. The utility model is characterized in that an incident light beam Gr is divided into a transmitting light beam Gt and a reflecting light beam Gf via a transmitting and reflecting film plate, and before the incidence in an overtone crystal, the two light beams Gt and Gf pass though a group of reflecting mirrors and fixing reflecting mirrors which are arranged on a movable platform. An included angle between the two light beams which are incident on the crystal can be changed by adjusting the reflecting mirrors, and finally, the two light beams are intersected at a point on the overtone crystal. The utility model has the advantages of simple structure, convenient operation and strong versatility, and a time measuring range can be extended from femtosecond to picosecond.
Description
The utility model is a kind of measuring instrument about the laser pulse width measurement of correlation, mainly is applicable to the measurement of intense laser pulse width parameter.
The time width of laser pulse is a basic parameter of ultra-short pulse laser system, and how it is measured accurately is a very important problem always.In recent years, along with the development of chirped pulse amplification, the generation of ultrashort, super strong laser pulse has had very big breakthrough, will be physics, chemistry, and the research of ultrashort superpower process provides strong means in the subjects such as biology.In order accurately to measure and be convenient to the adjustment of laser aid, be necessary to set up the surveying instrument that to monitor in real time the width of single laser pulse to the time delay of the amplifying laser pulse of low-repetition-frequency (tens HZ).People such as F.Salin are article " single measurements of 52 femtosecond pulses " (＂ Single-shot measurement ofa 52-fs pulse ＂) (applied optics, 26 volumes, the 20 first phase, 1987, the 4528--4531 page or leaf) in (Applied Optics), proposing a kind of structure is with laser beam process beam splitting and optical delay, is incident in simultaneously then in the second harmonic crystal, as shown in Figure 2, saturating anti-lamina membranacea 3 is with incident beam G
rBe divided into two bundles, a branch of is transmitted light beam G
t, another bundle is folded light beam G
fTransmitted light beam G
tAfter corner cube mirror 6 delays, be incident on the second harmonic crystal 11 folded light beam G through catoptron 5
fThrough also being incident in behind the catoptron 7 on the second harmonic crystal 11, the frequency doubled light signal G that two light beams produce on second harmonic crystal 11
eConverge on the detector 8 through a cylindrical lens 9, utilize the spatial intensity distribution of the received second harmonic signal of detector 8, infer the size that laser pulse width.In this structure, the measurable time range of surveying instrument is decided by two angle of beams that are incident on the second harmonic crystal, when the time width of incident light pulse changes greatly, this angle also needs very big variation, and existing surveying instrument generally all is to design for a certain specific time width scope, when the time range of incident laser changes greatly, must change element or use different surveying instruments instead, versatility is not strong, it is very inconvenient that this makes that existing instrument uses, and increased use cost.
The purpose of this utility model is at the shortcoming on the existing instrument, designs a kind of simple in structurely, and the monopulse autocorrelation measurer of highly versatile on same surveying instrument, does not need to change optical element, can widen the measurement range of instrument; When guaranteeing measuring accuracy, the application of convenient this surveying instrument reduces use cost.
Monopulse autocorrelation measurer of the present utility model is included on the base plate 15 of shell, along incident beam G
rThe direction of advancing is fixed with aperture 2 successively, catoptron 1, saturating anti-lamina membranacea 3, light beam G
rBehind saturating anti-lamina membranacea 3, be divided into two bundles, a branch of for seeing through the transmitted light beam G of saturating anti-lamina membranacea 3
t, the folded light beam G of another bundle for being reflected by saturating anti-lamina membranacea 3
f, along transmitted light beam G
tOn the direction of advancing, on base plate 15, be fixed with corner cube mirror 6 successively in order to time delay to be provided, catoptron 5, catoptron 12, catoptron 14, process catoptron 14 is with transmitted light beam G
tBe incident on the overtone crystal 11 that can produce second harmonic; Folded light beam G along saturating anti-lamina membranacea 3 reflections
fOn the direction of advancing, on base plate 15, be fixed with catoptron 4 successively, catoptron 7, folded light beam G
fBe reflected after mirror 7 reflections, through catoptron 4, saturating anti-lamina membranacea 3, catoptron 13 is incident in catoptron 14, and catoptron 14 is with folded light beam G
fAlso be incident on the overtone crystal 11; Second harmonic light beam G along overtone crystal 11 generations
cTransmission direction on, be fixed on successively on the base plate 15, slit 10 is arranged, cylindrical lens 9 is a detecting element 8, as shown in Figure 1 at last.Said catoptron 7,12,13rd places on the transportable platform that is fixed on the base plate 15.
The utility model is before light beam is incident in second harmonic crystal 11, will be by 12,13,14 3 catoptrons, by adjustment to this group catoptron, can realize being incident in the change of angle between two light beams on the crystal 11, wherein catoptron 12,13 be respectively be fixed on one can the platform of move left and right on, 14 of catoptrons maintain static.When the incident laser pulse width is the femtosecond magnitude, temporal resolution (distinguishable minimum time) in order to guarantee instrument needs little incident light angle, to fulfill this requirement on the second harmonic crystal, catoptron 12 moves right, catoptron 13 is moved to the left, and shifts to the axis of symmetry of crystal simultaneously, after moving on to the desired position, horizontally rotate the angle of two catoptrons, two light beams are intersected at a point, as shown in Figure 3 on crystal 11 through catoptron 12,13 reflection backs; When the incident light pulse time width is picosecond magnitude, in order to guarantee that instrument has enough big reference time measurement, need to increase two angle of beams that are incident on the crystal 11, at this moment, catoptron 12 is moved to the left, catoptron 13 moves right, the axis of symmetry that departs from crystal jointly after moving to the desired position, horizontally rotates two catoptrons, two-beam through catoptron 12,13 reflections is intersected at a point on crystal 11.In above-mentioned adjustment process, need the position of corresponding adjustment catoptron 7, to keep being incident in the equivalent optical path of the two-beam on the crystal 11.Thus, with catoptron 12,13 and catoptron 7 harmonies use, change or adjust under the situation of other element need not, can change two angle of beams that are incident on the second harmonic crystal, thereby change the reference time measurement of surveying instrument significantly, on an instrument, finish the work that many instruments of general needs just can be finished.
The utility model biggest advantage is simple in structure, and is easy to use, highly versatile, the continuable time range that changes institute's energy measurement can adapt to multiple application requirements, substitutes the instrument of two same kind, and can guarantee accurately to measure, reference time measurement can extend to psec from femtosecond.
Description of drawings:
Fig. 1 is the structural representation of the utility model monopulse autocorrelation measurer
Fig. 2 is a prior art monopulse autocorrelation measurement structural representation
Fig. 3 is the new part light path synoptic diagram that the utility model adopted
Fig. 4 is the time width scatter chart of the intense laser pulse that records among the utility model embodiment
Embodiment:
Use measuring instrument structure as shown in Figure 1.Incident beam G
rWavelength X
0=800nm, aperture 2 is in order to incident beam G
rCollimate; Wherein catoptron 1,4, and 5,7,12,13,14 for being coated with the catoptron of silverskin, and overtone crystal 11 is got lbo crystal, and thickness is 0.1mm; Saturating anti-lamina membranacea 3 is for being coated with the quartzy flat board to the basic frequency beam transflective film, and saturating anti-lamina membranacea 3 thickness are 0.5mm; The reflecting surface of corner cube mirror 6 is coated with silverskin, the focal distance f=50mm of cylindrical lens 9; Detecting element 8 adopts one dimension CCD, and measured laser pulse is from the desk-top titanium precious stone laser multiplying arrangement of a cover femtosecond, and this device is exported peak power 2TW, and pulse width is shorter than the ultrashort intense laser pulse of 50 femtoseconds, and pulse recurrence rate is 10HZ.Fig. 4 is a measurement result, and wherein horizontal ordinate is to distribute the time, and I is the intensity of the second harmonic signal that receives of detecting element 8, and the time width of the laser pulse that shows among the figure is 39 femtoseconds.
Claims (1)
1. a monopulse autocorrelation measurer is included on the base plate (15) of shell, along incident beam G
rThe direction of advancing is fixed with aperture (2) successively, catoptron (1), saturating anti-lamina membranacea (3), incident beam G
rBehind saturating anti-lamina membranacea (3), be divided into two-beam, a branch of for seeing through the transmitted light beam G of saturating anti-lamina membranacea (3)
t, along transmitted light beam G
tOn the direction of advancing, be fixed with corner cube mirror (6) successively on base plate (15), catoptron (5) is to overtone crystal (11); Restraint by the folded light beam G of saturating anti-lamina membranacea (3) reflection along another
fOn the direction of advancing, on base plate (15), be fixed with catoptron (7) to overtone crystal (11); Second harmonic light beam G along overtone crystal (11) generation
eThe direction of propagation on, on base plate (15), be fixed with slit (10), cylindrical lens (9) and detecting element (8) is characterized in that at transmitted light beam G
tLight path on, between catoptron (5) and the overtone crystal (11), transmitted light beam G
tThrough behind the catoptron (14) that places the catoptron (12) on the moveable platform and fix, inject overtone crystal (11) more earlier; At folded light beam G
fLight path on, saturating anti-lamina membranacea (3) and place between the catoptron (7) on the moveable platform catoptron (4) is arranged, between saturating anti-lamina membranacea (3) and overtone crystal (11), folded light beam G
fThrough after placing the catoptron (13) on the moveable platform, through fixing catoptron (14), be incident upon overtone crystal (11) more earlier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97242755 CN2293817Y (en) | 1997-11-28 | 1997-11-28 | Single-pulse self-correlation measuring instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97242755 CN2293817Y (en) | 1997-11-28 | 1997-11-28 | Single-pulse self-correlation measuring instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2293817Y true CN2293817Y (en) | 1998-10-07 |
Family
ID=33951894
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97242755 Expired - Fee Related CN2293817Y (en) | 1997-11-28 | 1997-11-28 | Single-pulse self-correlation measuring instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2293817Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103278249A (en) * | 2013-05-15 | 2013-09-04 | 中国科学院上海光学精密机械研究所 | Quasi-near field picosecond pulse width diagnosis instrument |
| CN104596652A (en) * | 2015-01-04 | 2015-05-06 | 中国科学院上海光学精密机械研究所 | Time-resolution-adjustable ultra-short pulse pulse-width measurer |
| CN107727249A (en) * | 2017-09-04 | 2018-02-23 | 中国科学院上海光学精密机械研究所 | The single-shot measurement apparatus and measuring method of ultra-intense ultra-short laser pulse far field pulsewidth |
-
1997
- 1997-11-28 CN CN 97242755 patent/CN2293817Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103278249A (en) * | 2013-05-15 | 2013-09-04 | 中国科学院上海光学精密机械研究所 | Quasi-near field picosecond pulse width diagnosis instrument |
| CN104596652A (en) * | 2015-01-04 | 2015-05-06 | 中国科学院上海光学精密机械研究所 | Time-resolution-adjustable ultra-short pulse pulse-width measurer |
| CN104596652B (en) * | 2015-01-04 | 2017-11-10 | 中国科学院上海光学精密机械研究所 | A kind of adjustable ultrashort pulse instrument for measuring the optical pulse of temporal resolution |
| CN107727249A (en) * | 2017-09-04 | 2018-02-23 | 中国科学院上海光学精密机械研究所 | The single-shot measurement apparatus and measuring method of ultra-intense ultra-short laser pulse far field pulsewidth |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |