CN103712699A - Laser pulse contrast ratio measurement device based on optical limiting - Google Patents
Laser pulse contrast ratio measurement device based on optical limiting Download PDFInfo
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- CN103712699A CN103712699A CN201410007476.8A CN201410007476A CN103712699A CN 103712699 A CN103712699 A CN 103712699A CN 201410007476 A CN201410007476 A CN 201410007476A CN 103712699 A CN103712699 A CN 103712699A
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Abstract
The invention provides a laser pulse contrast ratio measurement device based on optical limiting. In the laser pulse contrast ratio measurement device, a collimating mirror, an attenuation piece and a beam splitter I are sequentially placed in the high-power laser pulse incidence direction, a frequency doubling crystal, a filtering piece and a beam splitter II are sequentially arranged on a transmission light path of the beam splitter I, a half wavelength plate and a beam splitter III are sequentially arranged on a reflection light path of the beam splitter I, a convex lens I, a limiter, a convex lens II and a delay regulator are sequentially arranged on the reflection light path of the beam splitter III, frequency doubling light generated by the frequency doubling crystal is divided into a transmission portion and a reflection portion through the beam splitter II, the transmission portion and the reflection portion are parallel to transmission fundamental frequency light from the beam splitter III and reflection fundamental frequency light from the beam splitter III respectively and enter two third-order correlators respectively, correlated signals generated by the two third-order correlators are collected through a CCD, and finally, data are processed through a computer. The laser pulse contrast ratio measurement device is flexible and convenient to adjust and wide in test dynamic range.
Description
Technical field
The invention belongs to high-power laser test technical field, be specifically related to a kind of laser pulse contrast measurement mechanism based on light amplitude limit for high-power laser test.
Background technology
In the various experiments of beating solid target at substantial radiation source, advanced gamma light source and substantial radiation source, the gasification substance that prepulsing produces and plasma all can change the state of target material, thereby influence process, even changes mechanism of action, contrast becomes the bottleneck of the many experiments of restriction.If there is no sufficiently high laser pulse contrast, do not reach the experimental result needing.The development of ultrashort pulse technology is in the urgent need to carrying out the test of single-shot subpulse contrast, the Chinese utility model patent (patent No. ZL 2,010 2 0690649.8) that name is called < < laser pulse waveform measuring device > > discloses a kind ofly blocks by plasma pulse, measure simultaneously and block pulsed optical signals and the laser signal postponing through certain hour, carry out the method that graphic joining reconstruct obtains pulse contrast.The Chinese utility model patent (patent No. ZL 200720077677.0) that name is called < < apparatus for measuring high power ultra-short laser pulse contrast > > discloses a kind of by the measuring method of non-colinear third-order correlation signal acquisition pulse contrast.Owing to being subject to the restriction of detecting devices, the dynamic range of these device to test is limited.
Summary of the invention
In order to overcome the deficiency of the narrow dynamic range of existing measuring technique in laser pulse contrast is measured, the invention provides a kind of laser pulse contrast measurement mechanism based on light amplitude limit.
The technical solution adopted for the present invention to solve the technical problems is:
Laser pulse contrast measurement mechanism based on light amplitude limit of the present invention, is characterized in, in described measurement mechanism, places successively collimating mirror, attenuator, beam splitter I in high-power laser pulse incident direction.Incident pulse light is divided into transmitted light and reflected light through beam splitter I, is disposed with frequency-doubling crystal, filter plate, beam splitter II on the transmitted light path of beam splitter I, is disposed with half-wave plate, beam splitter III on the reflected light path of beam splitter I.The transmitted light of beam splitter I produces frequency doubled light through frequency-doubling crystal, described frequency doubled light projects after by the remaining fundamental frequency light of filter plate filtering and in beam splitter II, is divided into transmission frequency doubled light and reflection frequency doubled light, the reflected light of beam splitter I projects in beam splitter III after by half-wave plate, through beam splitter III, is divided into transmission fundamental frequency light and reflection fundamental frequency light.The transmission fundamental frequency light of beam splitter III and the reflection frequency doubled light of beam splitter II are also advanced into third-order relevant instrument I, on the frequency tripling beam direction producing in third-order relevant instrument I, place successively algorithm sheet, lens pillar I, CCD I, the frequency tripling light beam being produced by third-order relevant instrument I by algorithm sheet, lens pillar I, enters CCD I successively.On the reflected light path of beam splitter III, set gradually convex lens I, limiter, convex lens II, delay modulator; The reflection fundamental frequency light of described beam splitter III by convex lens I, limiter, convex lens II, delay modulator after with the transmission frequency doubled light of beam splitter II and be advanced into third-order relevant instrument II, on the frequency tripling beam direction producing in third-order relevant instrument II, place successively algorithm sheet II, lens pillar II, CCD II, the frequency tripling light beam being produced by third-order relevant instrument II by algorithm sheet II, lens pillar II, enters CCD II successively; Described CCD I, CCD II be external computing machine respectively, finally enters computing machine carry out data processing from the signal of CCD I, CCD II.
Described limiter is positioned at the common focal plane place of the colimated light system of convex lens I and convex lens II formation, and the material in limiter can be both solid, can be also the liquid packing in transparent vessel.
Described third-order relevant instrument I, third-order relevant instrument II adopt 90 degree non-colinear ooe positions to match, and according to different incident wavelengths, select different and frequency crystalline material.
The invention has the beneficial effects as follows:
1. the present invention adopts optical limiter paired pulses peak region to carry out precompression, and prepulsing can undampedly see through, by changing material concentration or the material thickness in limiter, can control well the ratio of compression of peak region, improve the detectable ability of prepulsing.
2. the present invention adopts 90 degree non-colinear ooe positions to match, large to the adjusting surplus with frequency crystal, so this device has flexible adjustment advantage easily;
3. the present invention adopts subregion measuring method, and a road is for ranging pulse peak region, and the delay modulator of separately leading up to regulates the prepulsing region of the time delay measurement pulse of fundamental frequency signal and frequency-doubled signal, has improved scope writing time of pulse contrast test.
Accompanying drawing explanation
Fig. 1 is the laser pulse contrast measurement mechanism light path schematic diagram based on light amplitude limit of the present invention;
In figure, 1. collimating mirror 2. attenuator 3. beam splitter I 4. frequency-doubling crystal 5. filter plate 6. beam splitter II 7. half-wave plate 8. beam splitter III 9. third-order relevant instrument I 10. algorithm sheet 11. lens pillar I 12.CCD I 13. convex lens I 14. limiter 15. convex lens II 16. delay modulator 17. third-order relevant instrument II 18. algorithm sheet II 19. lens pillar II 20.CCD II.
Embodiment
Below in conjunction with drawings and Examples, the present invention is further described, but should not limit the scope of the invention with this.
Embodiment 1
Fig. 1 is the laser pulse contrast measurement mechanism light path schematic diagram based on light amplitude limit of the present invention.In Fig. 1, the laser pulse contrast measurement mechanism based on light amplitude limit of the present invention in described measurement mechanism, is placed successively collimating mirror 1, attenuator 2, beam splitter I 3 in high-power laser pulse incident direction; Incident pulse light is divided into transmitted light and reflected light through beam splitter I 3, is disposed with frequency-doubling crystal 4, filter plate 5, beam splitter II 6 on the transmitted light path of beam splitter I 3, is disposed with half-wave plate 7, beam splitter III 8 on the reflected light path of beam splitter I 3; The transmitted light of beam splitter I 3 produces frequency doubled light through frequency-doubling crystal 4, described frequency doubled light projects after by the remaining fundamental frequency light of filter plate 5 filtering and in beam splitter II 6, is divided into transmission frequency doubled light and reflection frequency doubled light, the reflected light of beam splitter I 3 projects in beam splitter III 8 after by half-wave plate 7, through beam splitter III 8, is divided into transmission fundamental frequency light and reflection fundamental frequency light; The transmission fundamental frequency light of beam splitter III 8 and the reflection frequency doubled light of beam splitter II 6 are also advanced into third-order relevant instrument I 9, on the frequency tripling beam direction producing in third-order relevant instrument I 9, place successively algorithm sheet 10, lens pillar I 11, CCD I 12, the frequency tripling light beam being produced by third-order relevant instrument I 9, successively by algorithm sheet 10, lens pillar I 11, enters CCD I 12 and receives; On the reflected light path of beam splitter III 8, set gradually convex lens I 13, limiter 14, convex lens II 15, delay modulator 16; The reflection fundamental frequency light of described beam splitter III 8 by convex lens I 13, limiter 14, convex lens II 15, delay modulator 16 after and the transmission frequency doubled light of beam splitter II 6 be advanced into third-order relevant instrument II 17, on the frequency tripling beam direction producing in third-order relevant instrument II 17, place successively algorithm sheet II 18, lens pillar II 19, CCD II 20, the frequency tripling light beam being produced by third-order relevant instrument II 17, successively by algorithm sheet II 18, lens pillar II 19, enters CCD II 20; Described CCD I 12, CCD II 20 be external computing machine respectively, finally enters computing machine carry out data processing from the signal of CCD I 12, CCD II 20.
Described limiter 14 is positioned at the common focal plane place of the colimated light system of convex lens I 13 and convex lens II 15 formations, and the material that limiter is 14 li can be both solid, can be also the liquid packing in transparent vessel.
Described third-order relevant instrument I 9, third-order relevant instrument II 17 adopt 90 degree non-colinear ooe positions to match.According to different incident wavelengths, select different and frequency crystalline material.
The principle that laser pulse contrast based on light amplitude limit is measured is: measured laser pulse enters the amplitude limit material in limiter after sampling, the Excited-state Absorption principle of utilization based on such as two-photon absorption induction makes optics amplitude limit material transparent under the low light level, the characteristic of non-linear absorption under high light, versus pulse strength is carried out precompression, reduce the contrast of measured pulse, utilize correlation method that burst length strength signal is converted to spatial-intensity signal, by subregion method, to main pulse and prepulsing, divide region measurement, the main pulse of obtaining and prepulsing signal carry out Waveform Reconstructing through control system and image processing, finally restore the contrast information of pulse.
In the present embodiment, the first incidence surface of described beam splitter II 6 plates semi-transparent semi-reflecting film, second surface plating anti-reflection film; The first incidence surface of beam splitter III 8 plates the deielectric-coating that inverse ratio is 1:k, second surface plating anti-reflection film.
In the present embodiment, the effect of described delay modulator 16 is to guarantee to synchronize with the peak value of frequency-doubled signal through the fundamental frequency light prepulsing of limiter 14, and the effect of limiter 14 is the peak values of fundamental frequency signal of decaying, and allows undamped the passing through of prepulsing part of fundamental frequency signal.
In the present embodiment, incident pulse center wavelength of light is 1053nm, and pulse width is about 10 psecs.
First the fundamental frequency signal of 1053nm being collimated into directional light through collimating mirror 1 incides in beam splitter I 3, be divided into transmission and reflected light that intensity does not wait, weak transmitted light produces the frequency doubled light of 527nm through frequency-doubling crystal 4, then with filter plate 5, will remain fundamental frequency light absorption, frequency doubled light is undamped to be passed through, recycling beam splitter II 6, beam splitter III 8 is divided into two bundles by frequency doubled light and fundamental frequency light respectively, through the weak fundamental frequency light of beam splitter III 8 transmissions with through the frequency doubled light of beam splitter II 6 reflections and be advanced into third-order relevant instrument I 9, with the angles of approximately 30.1 degree 9 li of third-order relevant instrument I with frequency KDP crystal in intersect, this light path should make the main pulse peak value of frequency-doubled signal and the main pulse peak value of fundamental frequency signal synchronize, the 351nm coherent signal being produced by third-order relevant instrument I 9 after filtering attenuator 10 enters CCD12, the peak strength of coherent signal is positioned at the center of CCD12, stronger fundamental frequency light planoconvex lens I 13 through 8 reflections of beam splitter III, limiter 14, the limiter system that convex lens II 15 forms is carried out after peak value precompression, by delay modulator 16, regulate time delay, with frequency doubled light through 6 transmissions of beam splitter II and be advanced into third-order relevant instrument II 17, with the angles of approximately 30.1 degree 17 li of third-order relevant instrument II with frequency KDP crystal in intersect, the time delay τ of the main pulse peak value of frequency-doubled signal and the main pulse peak value of fundamental frequency signal regulates by delay modulator, with frequency crystal in the 351nm coherent signal that produces after filtering attenuator 18 enter CCD20.The saturating inverse ratio of supposing beam splitter III 8 is 1:k
1, entering CCD12 is k with the attenuation ratio that enters the algorithm sheet before CCD20
2: 1, the intensity obtaining in CCD12 center is I
1(3 ω), the intensity obtaining in CCD20 center is I
2(3 ω), k
1* k
2* I
1(3 ω)/I
2pulse contrast when the time delay that (3 ω) is ultrashort pulse peak value to be measured and prepulsing is τ.
Claims (3)
1. the laser pulse contrast measurement mechanism based on light amplitude limit, is characterized in that: in described measurement mechanism, place successively collimating mirror (1), attenuator (2), beam splitter I (3) in high-power laser pulse incident direction, incident pulse light is divided into transmitted light and reflected light through beam splitter I (3), on the transmitted light path of beam splitter I (3), be disposed with frequency-doubling crystal (4), filter plate (5), beam splitter II (6), on the reflected light path of beam splitter I (3), be disposed with half-wave plate (7), beam splitter III (8), the transmitted light of beam splitter I (3) produces frequency doubled light through frequency-doubling crystal (4), described frequency doubled light projects after by the remaining fundamental frequency light of filter plate (5) filtering and in beam splitter II (6), is divided into transmission frequency doubled light and reflection frequency doubled light, it is upper that the reflected light of beam splitter I (3) projects beam splitter III (8) after by half-wave plate (7), through beam splitter III (8), is divided into transmission fundamental frequency light and reflection fundamental frequency light, the reflection frequency doubled light of the transmission fundamental frequency light of beam splitter III (8) and beam splitter II (6) is also advanced into third-order relevant instrument I (9), on the frequency tripling beam direction producing in third-order relevant instrument I (9), place successively algorithm sheet (10), lens pillar I (11), CCD I (12), the frequency tripling light beam being produced by third-order relevant instrument I (9), successively by algorithm sheet (10), lens pillar I (11), enters CCD I (12), on the reflected light path of beam splitter III (8), set gradually convex lens I (13), limiter (14), convex lens II (15), delay modulator (16), the reflection fundamental frequency light of described beam splitter III (8) is by convex lens I (13), limiter (14), convex lens II (15), after delay modulator (16) and the transmission frequency doubled light of beam splitter II (6) be advanced into third-order relevant instrument II (17), on the frequency tripling beam direction producing in third-order relevant instrument II (17), place successively algorithm sheet II (18), lens pillar II (19), CCD II (20), the frequency tripling light beam being produced by third-order relevant instrument II (17) is successively by algorithm sheet II (18), lens pillar II (19), enter CCD II (20), described CCD I (12), CCD II (20) be external computing machine respectively, finally enters computing machine carry out data processing from the signal of CCD I (12), CCD II (20).
2. the laser pulse contrast measurement mechanism based on light amplitude limit according to claim 1, is characterized in that: described limiter (14) is positioned at the common focal plane place of the colimated light system of convex lens I (13) and convex lens II (15) formation.
3. the laser pulse contrast measurement mechanism based on light amplitude limit according to claim 1, is characterized in that: described third-order relevant instrument I (9), third-order relevant instrument II (17) adopt 90 degree non-colinear ooe positions to match.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104535201A (en) * | 2015-01-05 | 2015-04-22 | 中国工程物理研究院激光聚变研究中心 | Measuring device for contrast ratio of high-power ultrashort laser pulses |
| CN107677379A (en) * | 2017-09-30 | 2018-02-09 | 中国工程物理研究院激光聚变研究中心 | A kind of femto-second laser pulse waveform meter |
| CN107782456A (en) * | 2017-09-30 | 2018-03-09 | 中国工程物理研究院激光聚变研究中心 | A kind of ultrashort laser pulse measurement apparatus |
| CN109060151A (en) * | 2018-09-05 | 2018-12-21 | 中国工程物理研究院激光聚变研究中心 | A kind of subnanosecond laser pulse contrast measuring device |
| CN109540305A (en) * | 2019-01-16 | 2019-03-29 | 中国工程物理研究院激光聚变研究中心 | A kind of autocorrelation function analyzer |
| CN109738078A (en) * | 2019-01-16 | 2019-05-10 | 中国工程物理研究院激光聚变研究中心 | A kind of single-shot time autocorrelation measurement device |
| CN114061457A (en) * | 2021-11-18 | 2022-02-18 | 中国工程物理研究院激光聚变研究中心 | Two-photon fluorescence effect based target positioning system and method of tightly-focused laser device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201166588Y (en) * | 2007-12-28 | 2008-12-17 | 中国科学院上海光学精密机械研究所 | Apparatus for measuring high power ultra-short laser pulse contrast |
| CN201935737U (en) * | 2010-12-30 | 2011-08-17 | 中国工程物理研究院激光聚变研究中心 | Laser pulse waveform measuring device |
| US20120228501A1 (en) * | 2011-03-01 | 2012-09-13 | Fudan University | Single-shot pulse contrast measuring device based on non-harmonic long-wavelength sampling pulse |
| US20130322473A1 (en) * | 2012-06-01 | 2013-12-05 | Los Alamos National Security, Llc | Apparatus and method for measuring contrast in a high power laser system |
-
2014
- 2014-01-08 CN CN201410007476.8A patent/CN103712699B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201166588Y (en) * | 2007-12-28 | 2008-12-17 | 中国科学院上海光学精密机械研究所 | Apparatus for measuring high power ultra-short laser pulse contrast |
| CN201935737U (en) * | 2010-12-30 | 2011-08-17 | 中国工程物理研究院激光聚变研究中心 | Laser pulse waveform measuring device |
| US20120228501A1 (en) * | 2011-03-01 | 2012-09-13 | Fudan University | Single-shot pulse contrast measuring device based on non-harmonic long-wavelength sampling pulse |
| US20130322473A1 (en) * | 2012-06-01 | 2013-12-05 | Los Alamos National Security, Llc | Apparatus and method for measuring contrast in a high power laser system |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104535201A (en) * | 2015-01-05 | 2015-04-22 | 中国工程物理研究院激光聚变研究中心 | Measuring device for contrast ratio of high-power ultrashort laser pulses |
| CN104535201B (en) * | 2015-01-05 | 2017-08-15 | 中国工程物理研究院激光聚变研究中心 | A kind of apparatus for measuring high power ultra-short laser pulse contrast |
| CN107677379A (en) * | 2017-09-30 | 2018-02-09 | 中国工程物理研究院激光聚变研究中心 | A kind of femto-second laser pulse waveform meter |
| CN107782456A (en) * | 2017-09-30 | 2018-03-09 | 中国工程物理研究院激光聚变研究中心 | A kind of ultrashort laser pulse measurement apparatus |
| CN107677379B (en) * | 2017-09-30 | 2023-06-09 | 中国工程物理研究院激光聚变研究中心 | Femtosecond laser pulse waveform measuring device |
| CN109060151A (en) * | 2018-09-05 | 2018-12-21 | 中国工程物理研究院激光聚变研究中心 | A kind of subnanosecond laser pulse contrast measuring device |
| CN109060151B (en) * | 2018-09-05 | 2023-08-15 | 中国工程物理研究院激光聚变研究中心 | Subnanosecond laser pulse contrast measuring device |
| CN109540305A (en) * | 2019-01-16 | 2019-03-29 | 中国工程物理研究院激光聚变研究中心 | A kind of autocorrelation function analyzer |
| CN109738078A (en) * | 2019-01-16 | 2019-05-10 | 中国工程物理研究院激光聚变研究中心 | A kind of single-shot time autocorrelation measurement device |
| CN114061457A (en) * | 2021-11-18 | 2022-02-18 | 中国工程物理研究院激光聚变研究中心 | Two-photon fluorescence effect based target positioning system and method of tightly-focused laser device |
| CN114061457B (en) * | 2021-11-18 | 2023-12-05 | 中国工程物理研究院激光聚变研究中心 | Target positioning system and method for tightly focused laser device based on two-photon fluorescence effect |
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