CN107045210A - High-chip amount laser circular grating compressor reducer - Google Patents
High-chip amount laser circular grating compressor reducer Download PDFInfo
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- CN107045210A CN107045210A CN201710020914.8A CN201710020914A CN107045210A CN 107045210 A CN107045210 A CN 107045210A CN 201710020914 A CN201710020914 A CN 201710020914A CN 107045210 A CN107045210 A CN 107045210A
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- 239000003638 chemical reducing agent Substances 0.000 title claims abstract description 24
- 238000007906 compression Methods 0.000 abstract description 10
- 230000006835 compression Effects 0.000 abstract description 10
- 230000003321 amplification Effects 0.000 description 7
- 238000003199 nucleic acid amplification method Methods 0.000 description 7
- 230000003287 optical effect Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 210000001367 artery Anatomy 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000747 cardiac effect Effects 0.000 description 1
- 238000013144 data compression Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000003292 diminished effect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003902 lesion Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000009022 nonlinear effect Effects 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000002310 reflectometry Methods 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 210000003462 vein Anatomy 0.000 description 1
Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/42—Diffraction optics, i.e. systems including a diffractive element being designed for providing a diffractive effect
- G02B27/44—Grating systems; Zone plate systems
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/35—Non-linear optics
- G02F1/3501—Constructional details or arrangements of non-linear optical devices, e.g. shape of non-linear crystals
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/35—Non-linear optics
- G02F1/3501—Constructional details or arrangements of non-linear optical devices, e.g. shape of non-linear crystals
- G02F1/3503—Structural association of optical elements, e.g. lenses, with the non-linear optical device
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/35—Non-linear optics
- G02F1/39—Non-linear optics for parametric generation or amplification of light, infrared or ultraviolet waves
- G02F1/392—Parametric amplification
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Optics & Photonics (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Lasers (AREA)
Abstract
A kind of high-chip amount laser circular grating compressor reducer, including the first grating to, the second grating to, the 3rd grating to, the 4th grating pair and eight speculums.Laser pulse is divided into left and right two parts, respectively along clockwise and counterclockwise into gratings compressor.Using the first grating and the second grating to introducing space chirp, the 3rd grating pair and the 4th grating are efficiently reduced to required raster size.The present invention relates to ultrashort and ultrahigh laser field, high-chip amount high energy laser pulse compression field is particularly suitable for use in, easy to adjust, raster size demand relatively small the advantages of stable with compact conformation.
Description
Technical field
The present invention relates to ultrashort and ultrahigh laser, particularly a kind of high-chip amount laser circular grating compressor reducer.The ring light
Grid voltage contracting utensil have the advantages that compact conformation, stably, easy to adjust, raster size demand it is relatively small.
Background technology
Chirped pulse amplification is the current classical technology for obtaining ultrashort, super strong laser pulse, and it is first with pulse exhibition
Wide device introduces certain chirp value to femtosecond seed pulse, makes pulse stretching, then by amplification after, utilize compressor reducer to introduce and exhibition
The opposite chirp value of wide device, restores pulse width.After broadening, the peak power of pulse is greatly diminished, subsequent
Chirped laser pulse can be sufficiently amplified without producing nonlinear effect and amplification saturation effect too early in amplification process.
Based on chirped pulse amplification, domestic and international scientific research personnel has been obtained for peak power and reaches number bat watt (1015W laser arteries and veins)
Punching, has been greatly facilitated the research and application of basic physicses, has been that forward position physics creates unprecedented extreme condition.
In order to laser pulse is amplified to higher energy, while avoiding the lens lesion in amplification process, it is necessary to planting
The pulse width that subpulse is introduced after bigger chirp value, broadening reaches that 10 nanoseconds are even broader, by amplifying afterpulse energy
KJ (kilojoule) can be reached.Therefore, time domain data compression is carried out to such pulse, gratings compressor will bear very strong its peak work
Rate.In order to avoid raster burn, the beam size into compressor reducer will increase to 0.5 meter or so, and grating length also correspondingly increases
Greatly to 4 meters or so.The livermore laboratory in the U.S. can prepare meter level grating (960 millimeters) maximum in the world, if adopted
With traditional compressor reducer configuration, the grating of high-chip amount laser compressor reducer needs to be spliced with 4 blocks of meter level gratings, this compression
Device is expensive, and splicing difficulty is too big, nor stable.
The content of the invention
In order to overcome the above-mentioned deficiencies of the prior art, the present invention provides a kind of high-chip amount laser pulse annular compression device.
The present invention has compact conformation stable, easy to adjust, the advantages of raster size demand is relatively small.
In order to reach foregoing invention purpose, the technical solution adopted in the present invention is：
A kind of high-chip amount laser circular grating compressor reducer, its feature is, including the first grating by being parallel to each other and
First grating pair of the second optical grating constitution, by the 3rd grating and the second grating pair of the 4th optical grating constitution being parallel to each other, by phase
3rd grating pair of mutual the 5th parallel grating and the 6th optical grating constitution, by the 7th grating being parallel to each other and the 8th optical grating constitution
The 4th grating pair, described the second grating to be the first described grating pair mirror image, the 4th described grating is to being described
The 3rd grating pair mirror image, in addition to the first speculum, the second speculum, the 3rd speculum, the 4th speculum, the 5th reflection
Mirror, the 6th speculum, the 7th speculum and the 8th speculum；
The first described speculum is located at the position of initial incident beam cross section half, and initial incident light is through the first reflection
Mirror is averaged beam splitting for the first incident light and the second incident light；
It is empty to producing that the second described incident light is reflected into the first described grating through the second described speculum successively
Between chirp, described the 3rd grating pair and the 4th grating pair, warp are reflected into through the 3rd described speculum and the 4th speculum
3rd grating pair and the 4th grating reflect, into institute the light beam after compression through the 5th described speculum and the 6th speculum
The second grating stated reflects, along the first incident light compensation space chirp through the 7th described speculum and the 8th speculum
Opposite direction outgoing；
The first described incident light reflects through the 8th described speculum and the 7th speculum successively, into described second
Grating is reflected through the 6th described speculum and the 5th speculum introducing space chirp, into the 4th described grating pair and
3rd grating is reflected through the 4th described speculum and the 3rd speculum compression, empty to compensation into the first described grating
Between chirp, reflected through described the second speculum, along the opposite direction outgoing of the second described incident light.
Described incident light needs have certain angle (being more than 0.5 °, less than 5 °) in level, so makes incident light
It is different with the path that emergent light leaves compressor reducer into compressor reducer, it is more convenient outgoing light-output compressor reducer.
Compared with prior art, the beneficial effects of the invention are as follows：
The secondary utilization of annular timesharing that high-chip amount laser circular grating compressor reducer of the present invention realizes gratings compressor, profit
With the first grating and the second grating to introducing space chirp, the 3rd grating pair and the 4th grating are efficiently reduced to required light
There is grid size, the both direction of annular compression device identical to compress dispersion measure, and the pulse of high-chip amount ultra-intense laser can be achieved
Compression.
Brief description of the drawings
Fig. 1 is traditional gratings compressor schematic diagram.
Fig. 2 is high-chip amount laser circular grating compressor reducer schematic diagram of the present invention.
Embodiment
Make below in conjunction with the accompanying drawings with specific embodiment come the high-chip amount laser circular grating compressor reducer to the present invention into one
Elaborating for step, in the hope of the structure composition situation of the present invention is more clearly understood, but can not limit of the invention special with this
The protection domain of profit.
Referring to Fig. 2, Fig. 2 is the structural representation of high-chip amount laser circular grating compressor reducer embodiment of the present invention, by
Scheme visible, high-chip amount laser circular grating compressor reducer of the present invention, including the first grating 3 and the second grating 4 by being parallel to each other
The second grating that the first grating constituted is constituted to 001, by the 3rd grating 14 being parallel to each other and the 4th grating 13 to 002, by
The 3rd grating that the 5th grating 7 being parallel to each other and the 6th grating 8 are constituted is to 003, by the 7th grating 9 and the 8th being parallel to each other
The 4th grating that grating 10 is constituted to 004, the second described grating be the first described grating to 002 to 001 mirror image, it is described
The 4th grating be the 3rd described grating to 004 to 003 mirror image, in addition to the first speculum 1, the second speculum the 2, the 3rd
Speculum 5, the 4th speculum 6, the 5th speculum 11, the 6th speculum 12, the 7th speculum 15 and the 8th speculum 16；
The first described speculum 1 is located at the position of initial incident beam cross section half, and initial incident light is anti-through first
Penetrate mirror 1 and be averaged beam splitting for the first incident light 01 and the second incident light 02；
The second described incident light 02 is reflected into the first described grating to 001 through the second described speculum 2 successively
Space chirp is produced, the 3rd described grating is reflected into 003 and the through described the 3rd speculum 5 and the 4th speculum 6
Four gratings to 004, through the 3rd grating to 003 and the 4th grating compressed to 004 after light beam, through the described He of the 5th speculum 11
6th speculum 12 reflects, into the second described grating to 002 compensation space chirp, through the 7th described speculum 15 and
Eight speculums 16 reflect, along the opposite direction outgoing of the first incident light 01；
The first described incident light 01 reflects through the 8th described speculum 16 and the 7th speculum 15 successively, into described
The second grating introduce space chirp to 002, reflected through the 6th described speculum 12 and the 5th speculum 11, into described
4th grating to 004 and the 3rd grating to 003 compress, reflected through the 4th described speculum 6 and the 3rd speculum 5, into institute
The first grating stated is reflected through the second described speculum 2 001 compensation space chirp, along the second described incident light 02
Opposite direction outgoing.
Described all speculums are all using the optical flat mirror of 45 ° of total reflection medium films of plating, and reflectivity is more than 99.5%.
The course of work of high-chip amount laser circular grating compressor reducer embodiment of the present invention is as follows：
Chirp long pulse (the cardiac wave in spot size 40cm*40cm, 1053nm of energy amplification is completed in chirp amplifying stage
It is long, 20nm spectral widths, 10ns pulse widths) it is incident to gratings compressor according to the direction of setting.Angle of incidence of light is 72 °,
There is the elevation angle less than 5 ° in the horizontal direction.
The incident laser pulse is by 1 point of left and right two parts for 20cm*40cm of the first speculum：First incident light 01,
Second incident light 02.Wherein the second light beam 02 enters gratings compressor, another part in the counterclockwise direction after the second speculum 2
Along entering gratings compressor clockwise after the 8th speculum 16 and the 7th speculum 15.
The light pulse that second incident light 02 is advanced counterclockwise is reflected through the second described speculum 2, into described first
Grating is to 001, and the light path that the light of different wave length passes through is different, and long wavelength component optical length, short wavelength component light path is short.Solid line in Fig. 2
Most long wavelength's component in spectrum is represented, dotted line represents most short component in spectrum.Light pulse is through the first grating to introducing space after 001
Chirp, enters the 3rd grating to 003, long wavelength component and short wavelength component are handed over after the 3rd speculum 5 and the 4th speculum 6
Fork, effectively reduces the lateral dimension of the 6th grating 8, is compressed through the 4th grating to 004, through the 5th described speculum 11 and the
Six speculums 12 reflect, into the second described grating to 002 compensation space chirp, through the 7th described speculum 15 and the 8th
Speculum 16 reflects, and along the opposite direction outgoing of the first incident light 01, is finally completed the chirp compression of pulse.
The light pulse that first incident light 01 is advanced clockwise is reflected through the 8th described speculum 16 and the 7th speculum 15,
Into described 002 pair of introducing space chirp of the second grating, reflect, enter through the 6th described speculum 12 and the 5th speculum 11
Enter the 4th described grating to 004 and the 3rd grating compressed to 003, it is anti-through the 4th described speculum 6 and the 3rd speculum 5
Penetrate, into the first described grating to 001 compensation space chirp, reflected through the second described speculum 2, along the second incident light 02
Opposite direction outgoing, be finally completed Chirped Pulse Compression.
Two-part light pulse is combined, because in the vertical direction is with the presence of 1 ° of the elevation angle, emergent light and incident light
In the vertical direction is separated.The identical wavelength component light path of light pulse advanced clockwise and counterclockwise is identical, in time
It is synchronous.
High-chip amount laser circular grating compressor reducer of the present invention is mainly used in the compression of high-chip amount laser pulse.
Although the exemplary embodiment with reference to the present invention specifically describes and shows the present invention, this area it is general
It is logical it is to be understood by the skilled artisans that in the case where not departing from the spirit and scope of the present invention being defined by the claims, can be right
It carries out the various changes of form and details.
Claims (2)
1. a kind of high-chip amount laser circular grating compressor reducer, it is characterised in that including the first grating (3) by being parallel to each other and
The first grating that second grating (4) is constituted is made up of to (001) the 3rd grating (14) being parallel to each other and the 4th grating (13)
The 3rd grating that second grating is constituted to (002), by the 5th grating (7) being parallel to each other and the 6th grating (8) to (003), by
The 4th grating that the 7th grating (9) being parallel to each other and the 8th grating (10) are constituted is to (004), the second described grating pair
(002) it is mirror image of the first described grating to (001), the 4th described grating is the 3rd described grating pair to (004)
(003) mirror image, in addition to the first speculum (1), the second speculum (2), the 3rd speculum (5), the 4th speculum (6),
Five speculums (11), the 6th speculum (12), the 7th speculum (15) and the 8th speculum (16)；
Described the first speculum (1) is located at the position of initial incident beam cross section half, and initial incident light is through the first reflection
Mirror (1) is averaged beam splitting for the first incident light (01) and the second incident light (02)；
Described the second incident light (02) is reflected into the first described grating pair through described the second speculum (2) successively
(001) space chirp is produced, the 3rd described grating is reflected into through the 3rd described speculum (5) and the 4th speculum (6)
To (003) and the 4th grating to (004), the light beam after being compressed through the 3rd grating to (003) and the 4th grating to (004), through institute
The 5th speculum (11) stated and the reflection of the 6th speculum (12), into the second described grating to (002) compensation space chirp,
Reflected through the 7th described speculum (15) and the 8th speculum (16), along the opposite direction outgoing of the first incident light (01)；
Described the first incident light (01) reflects through the 8th described speculum (16) and the 7th speculum (15) successively, into institute
The second grating stated introduces space chirp to (002), reflects, enters through the 6th described speculum (12) and the 5th speculum (11)
Enter the 4th described grating to compress (003) (004) and the 3rd grating, reflected through the 4th described speculum (6) and the 3rd
Mirror (5) reflects, and into the first described grating to (001) compensation space chirp, is reflected through described the second speculum (2), edge
The opposite direction outgoing of described the second incident light (02).
2. high-chip amount laser circular grating compressor reducer according to claim 1, it is characterised in that described incident light is needed
There is certain angle in level, i.e., more than 0.5 °, less than 5 °, incident light is left into compressor reducer and emergent light
The path of compressor reducer is different, is more convenient outgoing light-output compressor reducer.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710020914.8A CN107045210B (en) | 2017-01-11 | 2017-01-11 | High-chip amount laser circular grating compressor |
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|---|---|---|---|
| CN201710020914.8A CN107045210B (en) | 2017-01-11 | 2017-01-11 | High-chip amount laser circular grating compressor |
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| CN107045210A true CN107045210A (en) | 2017-08-15 |
| CN107045210B CN107045210B (en) | 2019-09-20 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108594461A (en) * | 2018-01-31 | 2018-09-28 | 中国科学院上海光学精密机械研究所 | Internal light splitting type gratings compressor |
| CN108957765A (en) * | 2018-08-27 | 2018-12-07 | 华中科技大学 | A kind of method and device changing laser focal beam spot direction in space |
| CN112366497A (en) * | 2020-11-23 | 2021-02-12 | 中国科学院上海光学精密机械研究所 | Laser pulse width compression system with preset space chirp |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108594461A (en) * | 2018-01-31 | 2018-09-28 | 中国科学院上海光学精密机械研究所 | Internal light splitting type gratings compressor |
| CN108594461B (en) * | 2018-01-31 | 2020-06-09 | 中国科学院上海光学精密机械研究所 | Internal light distribution type grating compressor |
| CN108957765A (en) * | 2018-08-27 | 2018-12-07 | 华中科技大学 | A kind of method and device changing laser focal beam spot direction in space |
| CN108957765B (en) * | 2018-08-27 | 2020-05-19 | 华中科技大学 | Method and device for changing space direction of laser focusing light spot |
| CN112366497A (en) * | 2020-11-23 | 2021-02-12 | 中国科学院上海光学精密机械研究所 | Laser pulse width compression system with preset space chirp |
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| Publication number | Publication date |
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| CN107045210B (en) | 2019-09-20 |
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