CN107482432A - Annular multi-pass laser amplification device - Google Patents
Annular multi-pass laser amplification device Download PDFInfo
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- CN107482432A CN107482432A CN201710700165.3A CN201710700165A CN107482432A CN 107482432 A CN107482432 A CN 107482432A CN 201710700165 A CN201710700165 A CN 201710700165A CN 107482432 A CN107482432 A CN 107482432A
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- 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
- H01S3/10007—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating in optical amplifiers
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- 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
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/08—Construction or shape of optical resonators or components thereof
- H01S3/081—Construction or shape of optical resonators or components thereof comprising three or more reflectors
- H01S3/082—Construction or shape of optical resonators or components thereof comprising three or more reflectors defining a plurality of resonators, e.g. for mode selection or suppression
-
- 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
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/08—Construction or shape of optical resonators or components thereof
- H01S3/081—Construction or shape of optical resonators or components thereof comprising three or more reflectors
- H01S3/083—Ring lasers
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- 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
- H01S3/10061—Polarization control
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- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
- Lasers (AREA)
Abstract
A kind of annular multi-pass laser amplification device, its composition include：Beam expander, soft aperture slot, first polarization splitting prism, electric light opens the light, second polarization splitting prism, first laser spatial filter system, one 45 degree of total reflective mirror, 2nd 45 degree of total reflective mirror, first laser amplification module, 3rd 45 degree of total reflective mirror, 4th 45 degree of total reflective mirror, 90 degree of quartzy rotors, second space filter system, second laser amplification module, 5th 45 degree of total reflective mirror, 6th 45 degree of total reflective mirror, 3rd laser spatial filter system, two-dimentional adjustable 45 degree of total reflective mirrors with one-dimensional translation, the first laser amplification module, second laser amplification module performance is identical.The present invention is controlled based on annular light path configuration and impulsive synchronization, has the characteristics that the amplification of active multi-way, compact-sized, energy storage extraction efficiency is high.
Description
Technical field
The present invention relates to Solid State Laser amplifying technique field, particularly a kind of annular multi-way based on active polarization control swashs
Optical amplification device.
Background technology
With the development of Solid State Laser technology, big energy, high power, bloom are difficult to using single resonance-cavity laser
The pulsed laser output of the indexs such as beam quality.Then, laser amplifier architecture laser system (MOPA) is developed in recent years, profit
Above-mentioned requirements can be realized with this system, and the universe with time waveform, pulsewidth, spectral characteristic, polarization characteristic etc. is adjusted
Ability processed.
Existing Solid State Laser amplifying technique, mainly using one way (Fig. 1), round trip (Fig. 2) or quadruple pass (Fig. 3) amplifying technique,
I.e. laser pulse terminates in pumping, single, it is double time, four times by gain media, laser pump (ing) energy storage extraction efficiency is with passing through
Number of passes can improve constantly.But existing round trip or four-range multiplication system all amplify mode using passive multi-way, once i.e. system building
Finish, can not dynamically change number of the light beam by gain media.
For high energy storage gain media, such as neodymium glass material, after quadruple pass is by gain media, laser pulse is to energy storage
Energy extraction efficiency is still relatively low, by improving the number of passes by gain media, can improve energy storage extraction efficiency；
Due to Fresel diffraction effect, laser beam Free propagation can produce diffraction modulation at hot spot edge, and then reduce
Beam quality, beam quality in Laser beam propagation can be effectively ensured with reference to space pin-hole filter-ing technology and Image relaying technology；
In the prior art, using linear cavity amplifying technique such as four-range multiplication system (Fig. 3), effectively long pulse can not be avoided to put
Laser pulse juxtaposition in gain media or optical element greatly in (5-25ns), and pulse overlap can cause local peaking's work(
Rate is too high, easily causes optic element damage, is unfavorable for high power laser system operation.
The content of the invention
The present invention is to provide a kind of active polarization control multi-pass laser amplification device, and the device has multiplication factor height, knot
The characteristics of structure is compact, energy storage extraction efficiency is high.
The technical solution of the present invention is as follows：
A kind of annular multi-pass laser amplification device, feature are that its composition includes：Beam expander, soft aperture slot, the first polarization
Amici prism, electric light open the light, the second polarization splitting prism, the first laser spatial filter system, the one 45 degree of total reflective mirror, the 2nd 45 degree
Total reflective mirror, first laser amplification module, the 3rd 45 degree of total reflective mirror, the 4th 45 degree of total reflective mirror, 90 degree of quartzy rotors, second space filter
Ripple device system, second laser amplification module, the 5th 45 degree of total reflective mirror, the 6th 45 degree of total reflective mirror, the 3rd laser spatial filter system and
Two-dimentional adjustable 45 degree of total reflective mirrors with one-dimensional translation；The position relationship of above-mentioned component is as follows：
Perpendicular linear polarization laser pulse incides first polarization point after described beam expander and soft aperture slot successively
Light prism, opened the light after first polarization splitting prism, 90 degree of reflections through described electric light and impinge perpendicularly on the second described polarization
Amici prism, after second polarization splitting prism, 90 degree of reflections, successively through the first described laser spatial filter system, the 1st
Degree total reflective mirror, the 2nd 45 degree of total reflective mirror incide first laser amplification module, after first laser amplification module amplification, then according to
It is secondary to incide second through the 3rd 45 degree of total reflective mirror, the 4th 45 degree of total reflective mirror, 90 degree of quartzy rotor and second space filter systems
Laser amplifying module, after second laser amplification module amplification output, it is all-trans again through the 5th 45 degree of total reflective mirror, the 6th 45 degree
Mirror and the 3rd laser spatial filter system incide described two-dimentional adjustable 45 degree of total reflective mirrors, through the adjustable 45 degree of total reflective mirrors of the two dimension
(the first described polarization splitting prism is injected into after reflection, described electricity is incided after first polarization splitting prism transmission
Light opens the light；
The first described laser spatial filter system is 4f Image relaying systems, and the spacing of two lens is d1=2f1, f1For
One space filter lens focal length；
Described second space filter system is defocus 4f Image relaying systems, and the spacing of two lens is d2,
Wherein, f2For the second space wave filter focal length of lens, fr,fφThe respectively footpath of laser amplifying module thermal focal length
To component and tangential component；
The 3rd described laser spatial filter system is 4f Image relaying systems, and the spacing of two lens is d3=2f3, f3For
Three space filter lens focal lengths；
Utilize pulse synchronous signal generator Synchronization Control pump supply source, electrooptical switching and laser pulse synchronization.
Described soft aperture slot is chromium-plated quartz glass plate or optical glass plating gradual change reflectivity anti-reflection film is made or light is sought
Location liquid crystal light modulator；
Described electric light, which opens the light, is rotated by 90 ° linearly polarized laser pulse polarization when opening, the electrooptical switching can be replaced two
Individual, each electrooptical switching makes 45 degree of polarization rotating Vortex, effect and the former equivalence；
Described first laser amplification module and the gain media geometries of second laser amplification module are bar-shaped or piece
Shape gain media, gain medium material are neodymium glass, the property of described first laser amplification module and second laser amplification module
Energy parameter is completely the same.
Described two-dimentional adjustable 45 degree of total reflective mirrors with one-dimensional translation can be replaced distorting lens.
The knot of described the first laser spatial filter system, second space filter system and the 3rd laser spatial filter system
Structure, comprising two the first planoconvex spotlights of parfocal, the second planoconvex spotlight, vacuum pipe and it is placed in the first planoconvex spotlight focal plane
Aperture is filtered, the filtering aperture has two-dimension translational mechanism.
The injection mode of described amplification system light path is reflective or transmission-type.
The present invention compensates laser amplifying module heat using double excitation amplification module combination Image relaying and 90 degree of quartzy rotors
Take off inclined effect；
90 degree of described quartzy rotors are rotated by 90 ° injection polarization light polarization, are placed in close between two groups of laser amplifying modules
Laser amplifying module position, it is equivalent to use two 45 degree of quartzy rotors in the same direction；
The long L of overall laser amplifier system annular light path chamber and seed light beam pulsewidth tpIt is related as,
L=tcC ＞ (tr+tp)c
Wherein, c be air in the laser light velocity, tcWeek age, t are transmitted for laser beam intracavitaryrRespectively electrooptical switching rises
Along the time；
Compared with prior art, the present invention has the effect that：
The present invention is polarized using electrooptical switching active control laser pulse, is realized laser pulse multi-pass amplifier, is beneficial to
Gain media energy storage extraction efficiency is improved, when using identical amplification module, increase laser system output energy；With reference to Image relaying
Technology, the long transmission light beam quality of long chamber is effectively ensured；
Double excitation amplification module combination Image relaying technology and quartzy rotor, effective compensation double excitation amplification module heat take off inclined effect
Should, be particularly suitable for use in the repetition nd glass laser amplification system with serious fuel factor；
Using the two-dimentional adjustable total reflective mirror with one-dimensional translation, multi-way light beam is effectively ensured and is coaxially passed with the first journey light beam
It is defeated, it is easy to adjust；
Multi-pass amplifier of the present invention uses loop configurations, compact-sized, is minimized beneficial to high power laser system；Finally
Ensure high light beam quality, big energy, the high-power output of laser pulse.
Brief description of the drawings
Fig. 1 is prior art one way multi-stage laser amplifying device structural representation
Fig. 2 is prior art round trip laser amplification device structural representation
Fig. 3 is prior art quadruple pass laser amplification device structural representation
Fig. 4 is the annular structural representation of multi-pass laser amplification device embodiment 1 of the present invention
In figure：1st, beam expander；2nd, soft aperture slot；3rd, the first polarization splitting prism；4th, electrooptical switching；5th, the second polarization spectro
Prism；6th, the first laser spatial filter system, two parfocal lens of composition 4f imaging systems, vacuum pipe and window are included
Piece, and the filtering aperture being placed in vacuum pipe；7th, the one 45 degree of total reflective mirror；8th, the 2nd 45 degree of total reflective mirror；9th, first laser
Amplification module；10th, the 3rd 45 degree of total reflective mirror；11st, the 4th 45 degree of total reflective mirror；12nd, 90 degree of quartzy rotors；13rd, second space filters
Device system；14th, second laser amplification module；15th, the 5th 45 degree of total reflective mirror；16th, the 6th 45 degree of total reflective mirror 17, the 3rd space filtering
Device system；18th, 45 degree of adjustable total reflective mirrors of two dimension with one-dimensional translation；
Fig. 5 is annular multi-pass laser amplification device embodiment 2 (transmission injection type) structural representation of the present invention, in figure：19、
3rd polarization splitting prism；20th, the 4th polarization splitting prism；
Fig. 6 is in the embodiment of the present invention, laser pulse polarization variations process schematic when annular quadruple pass amplifies, ignores amplification
The element without influence is polarized on laser pulse in system；
Fig. 7 is in the embodiment of the present invention, and electrooptical switching opens gate-width and laser pulse synchronization time series schematic diagram；
Fig. 8 is laser spatial filter system structural representation in the embodiment of the present invention；
Embodiment
With reference to embodiment and accompanying drawing, the present invention will be further described.But the protection model of the present invention should not be limited with this
Enclose.
, can by figure first referring to Fig. 4, Fig. 4 is the annular structural representation of multi-pass laser amplification device embodiment 1 of the present invention
See, the composition of the annular multi-pass laser amplification device of the present invention includes：The pulse of injected system linearly polarized laser is through beam expander 1, warp
The shaping of soft aperture slot 2,90 degree are reflected through the first polarization splitting prism 3, opens the light through electric light 4, be anti-through the second polarization splitting prism 5
Penetrate 90 degree, 180 degree of being turned back through the first laser spatial filter system 6, through 7, the 2nd 45 degree of total reflective mirrors 8 of the one 45 degree of total reflective mirror, thoroughly
Penetrate first laser amplification module 9,180 degree of being turned back through 10, the 4th 45 degree of total reflective mirrors 11 of the 3rd 45 degree of total reflective mirror, then 90 degree of transmission
Quartzy rotor 12, second space filter system 13, second laser amplification module 14, through the 5th 45 degree of anti-15, the 6th 45 degree of mirror
Anti- mirror 16 turn back 180 degree, transmission the 3rd laser spatial filter system 17, through two-dimentional adjustable 45 degree of total reflective mirrors 18 with one-dimensional translation
Turn back 90 degree, laser pulse transmits the first polarization splitting prism 3, and laser pulse undergoes a Cheng Fang great；
Described soft aperture slot 2 is chromium-plated quartz glass plate or optical glass plating gradual change reflectivity anti-reflection film is made or light is sought
Location liquid crystal light modulator.
The described electric light crystal 4 that opens the light is potassium dideuterium phosphate (DKDP) crystal, and crystal-driven voltage 11KV makes light beam polarization
It is rotated by 90 °, polarizes and horizontal polarization is changed into from vertical polarization or horizontal polarization is changed into vertical polarization, it should be appreciated that knows while use two
Electrooptical switching, each electrooptical switching make 45 degree of the equidirectional rotation of Laser Beam Polarization of equal value with the former.Opened by active control electric light
The opening and closing of pass, so as to control the input and output of laser pulse, and then the number of passes for controlling laser pulse to be transmitted in intracavitary.Electricity
Photoswitch need of work two-way triggers sequential, controls the unlatching (ON) of electrooptical switching respectively and closes (OFF), electrooptical switching is opened
Closing timing is illustrated relative to laser pulse by sequential such as Fig. 7 of electrooptical switching, and figure below corresponds to laser pulse n-th and led in figure
The sequential of electrooptical switching is crossed, upper figure is electrooptical switching trigger pulse sequential, timing diagram when being for the amplification of annular quadruple pass here,
Adjust the gate-width that electrooptical switching is opened, you can adjust the number of passes of annular multi-way amplification；
The knot of described the first laser spatial filter system, second space filter system and the 3rd laser spatial filter system
Structure, as shown in figure 8, the first planoconvex spotlight 61, the second planoconvex spotlight 62, vacuum pipe 63 including two parfocals and being placed in first
The filtering aperture 64 of the focal plane of planoconvex spotlight 61, the filtering aperture have two-dimension translational mechanism.
The first described laser spatial filter system is 4f Image relaying systems, and two lens spacing are d1=2f1, f1For first
Space filter lens focal length；
Described second space filter system is defocus 4f Image relaying systems, and two lens spacing are d2,
Wherein, f2For the second space wave filter focal length of lens, fr,fφRespectively laser amplifying module thermal focal length radial direction
Component and tangential component；
The 3rd described laser spatial filter system is 4f Image relaying systems, and two lens spacing are d3=2f3, f3For the 3rd
Space filter lens focal length；
The gain media geometries of two groups of described laser amplifying modules are bar-shaped or sheet, and gain medium material is neodymium
Glass；
Two groups of described laser amplifying module performance parameters are completely the same, such as gain media bore, doping concentration, pumping side
Formula (laser diode side pumped, laser diode end-face pump or xenon flash lamp pumping), pump power etc.；
In the system, laser amplifier mould is compensated using double excitation amplification module combination Image relaying and 90 degree of quartzy rotors
Block heat takes off inclined effect；
In the system, 90 degree of quartzy rotors are rotated by 90 ° injection polarization light polarization, are placed in two groups of laser amplifying modules
Between close to laser amplifying module position, be equivalent to use two 45 degree of quartzy rotors in the same direction；
In described system, overall light path is loop configurations, and injection mode is reflective embodiment 1 (see Fig. 1) or transmission
Formula injects embodiment 2 (see Fig. 2；
In the system, ensure pump supply source, electrooptical switching and laser using pulse synchronous signal generator simultaneous techniques
Impulsive synchronization；
In the system, the long L of overall laser amplifier system annular light path chamber and seed light beam pulsewidth tpIt is related as：
L=tcC ＞ (tr+tp)c
Wherein, c be air in the laser light velocity, tcIt is that laser beam transmits time of one week, t in intracavitaryrRise for electrooptical switching
Along the time；
The described adjustable total reflective mirror 8 of the two dimension of 45 degree with one-dimensional translation, this 45 degree adjustable total reflective mirrors of two dimension, is fixed on one
On dimension translation base, total reflective mirror there are three adjustable dimensions, make multi-way light beam and the first journey light beam co-axial propagation, be easy to adjust；
With reference to Fig. 6, polarization variations situation in laser pulse amplification process is described in detail：
The laser pulse that light polarization is perpendicular linear polarization light is initially injected, is obtained by beam expander 1 and soft aperture slot 2 pre- whole
Laser pulse after shape, then the laser pulse after pre-shaped (s light) be reflected into electric light into the first polarization splitting prism 3
Switch 4, now electrooptical switching 4 is closed mode, polarization is not changed, is still s light through electrooptical switching 4, s light is then
Subsequent optical path is reflected into the second polarization splitting prism 5, the first laser spatial filter system 6 of transmission polarizes constant；Then s
Light amplifies once through first laser amplification module 9, reaches 90 degree of quartzy rotors 12, and polarization dextrorotation is turn 90 degrees, and is changed into water
Horizontal line polarised light (p light), the (not shown) of transmission second space filter system 13, through second laser amplification module 14 again
It is exaggerated, transmits the 3rd laser spatial filter system 17, before so far laser pulse arrives again at the first polarization splitting prism 3 with p light,
Laser pulse passes through a Cheng Fang great, and light beam polarization is changed into p light from s light；
Then the polarization splitting prism of p light transmissions first, electrooptical switching 4 is reached, now electrooptical switching 4 is opening, by p
Light polarization is turn 90 degrees to the right partially, is changed into s light, and then s light is reflected 90 degree in the second polarization splitting prism 5, transmits the first space
Filter system 6, it is exaggerated then s light through first laser amplification module 9 and passes through 90 degree of quartzy rotors, polarize to right rotation 90
Degree, is changed into p light, transmits second space filter system, and then p light is exaggerated through second laser amplification module 13, transmits the
Three laser spatial filter systems 17, p light third time reach the first polarization splitting prism 3, and so far, laser pulse realizes that the second journey is put
Greatly, the first journey p light remains in that p light after the second Cheng Fang great, and then p light realizes the successively in a manner of similar second Cheng Fang great
Three journeys, quadruple pass amplification, so far, laser pulse realizes that quadruple pass amplifies, and now laser pulse arrives again at the first polarization spectro rib
Before mirror, polarize as p light polarization；
Then p light passes through the first polarization splitting prism, reaches described electrooptical switching 4, and now, electrooptical switching is closed, no
Laser pulse polarization is changed, laser pulse passes through electrooptical switching 4 with p light, reaches the second polarization splitting prism；Then p
Light passes through the second polarization splitting prism, pulsed laser output；So far, laser pulse realizes quadruple pass laser amplifier, and realizes laser
Pulse amplifying exports.
For other number of passes multi-pass laser pulse amplifying process polarization variations, quadruple pass amplification process like above, need to only change
Become electrooptical switching to open gate-width and ensure light beam and the time synchronized of electrooptical switching 4, you can realize other number of passes multi-pass laser pulses
Amplification.
The embodiment of the present invention is the foregoing is only, is not intended to limit the scope of the invention, it is every to utilize the present invention
The equivalent structure or equivalent flow conversion that specification and accompanying drawing content are made, or directly or indirectly it is used in other correlation techniques neck
Domain, it is included within the scope of the present invention.
Claims (7)
1. a kind of annular multi-pass laser amplification device, it is characterised by that its composition includes：Beam expander (1), soft aperture slot (2), first
Polarization splitting prism (3), electric light open the light (4), the second polarization splitting prism (5), the first laser spatial filter system (6), the 1st
Spend total reflective mirror (7), the 2nd 45 degree of total reflective mirror (8), first laser amplification module (9), the 3rd 45 degree of total reflective mirror (10), the 4th 45 degree
Total reflective mirror (11), 90 degree of quartzy rotors (12), second space filter system (13), second laser amplification module (14), five
45 degree of total reflective mirrors (15), the 6th 45 degree of total reflective mirror (16), the 3rd laser spatial filter system (17) and the two dimension with one-dimensional translation
Adjustable 45 degree of total reflective mirrors (18)；
Perpendicular linear polarization laser pulse incides first polarization after described beam expander (1) and soft aperture slot (2) successively
Amici prism (3), after the reflection of (3) 90 degree of first polarization splitting prism through described electric light open the light (4) impinge perpendicularly on institute
The second polarization splitting prism (5) stated, it is empty through described first successively after (5) 90 degree of reflections of second polarization splitting prism
Between filter system (6), the one 45 degree of total reflective mirror (7), the 2nd 45 degree of total reflective mirror (8) incide first laser amplification module (9),
Through the first laser amplification module (9) amplification after, then successively through the 3rd 45 degree of total reflective mirror (10), the 4th 45 degree of total reflective mirror (11),
90 degree of quartzy rotors (12) and second space filter system (13) incide second laser amplification module (14), through this second swash
It is empty through the 5th 45 degree of total reflective mirror (15), the 6th 45 degree of total reflective mirror (16) and the 3rd again after light amplification module (14) amplification output
Between filter system (17) incide described two-dimentional adjustable 45 degree of total reflective mirrors (18), through the adjustable 45 degree of total reflective mirrors (18) of the two dimension
Described the first polarization splitting prism (3) is injected into after reflection, is incided after first polarization splitting prism (3) transmission described
Electric light open the light (4)；
Described the first laser spatial filter system (6) is 4f Image relaying systems, and the spacing of two lens is d1=2f1, f1For first
Space filter lens focal length；
Described second space filter system is defocus 4f Image relaying systems, and the spacing of two lens is d2,
Wherein, f2For the second space wave filter focal length of lens, fr,fφThe respectively radial direction of laser amplifying module thermal focal length point
Amount and tangential component；
The 3rd described laser spatial filter system is 4f Image relaying systems, and the spacing of two lens is d3=2f3, f3It is empty for the 3rd
Between the wave filter focal length of lens；
Utilize pulse synchronous signal generator Synchronization Control pump supply source, electrooptical switching and laser pulse synchronization.
2. annular multi-pass laser amplification device according to claim 1, it is characterised in that described soft aperture slot (2) is plating
Chromium quartz glass plate or optical glass plating gradual change reflectivity anti-reflection film are made or light addressing liquid crystal light modulator.
3. annular multi-pass laser amplification device according to claim 1, it is characterised in that described electric light open the light (3) unlatching
When make linearly polarized laser pulse polarization be rotated by 90 °, the electrooptical switching can be replaced two, and each electrooptical switching makes polarization in the same direction
45 degree of rotation, effect are of equal value with the former.
4. annular multi-pass laser amplification device according to claim 1, it is characterised in that described first laser amplification mould
The gain media geometries of block and second laser amplification module are bar-shaped or sheet gain media, and gain medium material is neodymium glass
The performance parameter of glass, described first laser amplification module and second laser amplification module is completely the same.
5. annular multi-pass laser amplification device according to claim 1, it is characterised in that described that there is one-dimensional translation
Two dimension is adjustable, and 45 degree of total reflective mirrors can be replaced distorting lens.
6. annular multi-pass laser amplification device according to claim 1, it is characterised in that the first described spatial filter
The structure of system, second space filter system and the 3rd laser spatial filter system, include two the first planoconvex spotlights of parfocal
(61), the second planoconvex spotlight (62), vacuum pipe (63) and the filtering aperture for being placed in the first planoconvex spotlight (61) focal plane
(64), the filtering aperture has two-dimension translational mechanism.
7. the annular multi-pass laser amplification device according to any one of claim 1 to 6, it is characterised in that described amplification system
The injection mode for light path of uniting is reflective or transmission-type.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108173110A (en) * | 2018-02-01 | 2018-06-15 | 长春新产业光电技术有限公司 | Hundred hertz hundred nanosecond intensity laser device |
| CN109470449A (en) * | 2018-10-12 | 2019-03-15 | 中国科学院上海光学精密机械研究所 | Laser gain module key performance test device |
| CN111564751A (en) * | 2020-05-18 | 2020-08-21 | 中国人民解放军国防科技大学 | High-power narrow-linewidth optical fiber laser polarization control system and method |
| CN114284848A (en) * | 2021-12-20 | 2022-04-05 | 中国科学院上海光学精密机械研究所 | Broadband regenerative laser amplification device with adjustable gain spectrum |
| CN114498257A (en) * | 2021-12-09 | 2022-05-13 | 中国电子科技集团公司第五十三研究所 | Four-stroke batten laser amplification system |
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