CN102646921A - Neodymium glass regenerative amplifier - Google Patents
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- CN102646921A CN102646921A CN2012101105800A CN201210110580A CN102646921A CN 102646921 A CN102646921 A CN 102646921A CN 2012101105800 A CN2012101105800 A CN 2012101105800A CN 201210110580 A CN201210110580 A CN 201210110580A CN 102646921 A CN102646921 A CN 102646921A
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Abstract
The invention provides a neodymium glass regenerative amplifier, which comprises a regeneration cavity edge polarizing device, a quarter-wave plate, an electro-optical crystal and a first reflecting mirror which are sequentially arranged on a main optical path, and a regeneration cavity internal polarizing device, a neodymium glass rod and a second reflecting mirror which are sequentially arranged on an auxiliary optical path, wherein the regeneration cavity edge polarizing device is used for transmitting first-class polarized light and reflecting second-class polarized light; the quarter-wave plate is used for converting the first-class polarized light or the second-class polarized light into circularly polarized light; voltage applied to the electro-optical crystal is controlled, the electro-optical crystal is equivalent to a flat plate when no voltage is applied to the electro-optical crystal, and the electro-optical crystal is equivalent to a quarter-wave plate which quarter-wave voltage is applied to the electro-optical crystal; the regeneration cavity internal polarizing device is used for transmitting the first-class polarized light and transmitting the second-class polarized light, and the regeneration cavity internal polarizing device and the regeneration cavity edge polarizing device mutually receive the polarized light reflected by the opposite parties; and the neodymium glass rod is used for providing gain.
Description
Technical field
The present invention relates to the laser amplifier field, relate in particular to a kind of high-energy high efficiency neodymium glass regenerative amplifier.
Background technology
Neodymium doped phosphate glass (abbreviation neodymium glass) is widely used in fields such as ultrashort pulse amplification, high field physics and laser fusion because of it has big gain bandwidth, high saturation flux, high destructive threshold value, long upper level lifetime, low stimulated emission cross section, is easy to process advantage such as large scale.
The neodymium glass regenerative amplifier has combined the advantage of neodymium glass and regenerative amplifier, and the preamplifier that is suitable as very much high-gain uses.
But because the neodymium glass thermal conductance is poor, thermal effect is very serious, more high-octane neodymium glass regenerative amplifier receives the restriction of Small-scale Self-focusing effect and electrooptic crystal damage threshold, becomes technical barrier.
Summary of the invention
The technical problem that the present invention will solve provides a kind of neodymium glass regenerative amplifier, and the Small-scale Self-focusing effect in the neodymium glass is effectively controlled.
According to an aspect of the present invention, a kind of neodymium glass regenerative amplifier is provided, comprises:
Be successively set on the main optical path:
Regeneration cavity edge polarizer is suitable for transmission first kind polarised light, reflects the second type of polarization light;
Quarter-wave plate is suitable for changing the first kind or the second type of polarization light into circularly polarized light;
Electrooptic crystal is controlled the voltage that applies on it, makes that it is equivalent to plain film when this electrooptic crystal not being applied voltage, and it is equivalent to quarter-wave plate when this electrooptic crystal is applied quarter-wave voltage; With
First speculum; And
Be successively set on the light path:
Regeneration chamber internal polarizer spare is suitable for transmission first kind polarised light, reflects the second type of polarization light, and this regeneration chamber internal polarizer spare receives the polarised light that the other side is reflected each other with said regeneration cavity edge polarizer;
The neodymium glass rod is suitable for providing gain; With
Second speculum;
Wherein, The said first kind polarised light and the second type of polarization light polarization face differ 90 °, and said electrooptic crystal is suitable for controlling the polarization polarization state of light, and it repeatedly is exaggerated through the neodymium glass rod repeatedly; When the polarised light energy reaches required magnitude, said electrooptic crystal is pressurizeed its output.
Optional, said first speculum is flat mirror; Said second speculum is the plano-concave speculum; Wherein, said first speculum cooperates the spot size that is suitable for changing electrooptic crystal and neodymium glass rod position with second speculum, to obtain suitable chamber type.
Optional, the spot size of said neodymium glass rod center position is designed to 2.5mm.
Optional, said electrooptic crystal places near the maximum position of mould hot spot, the chamber of first speculum; Said neodymium glass rod places in the interior Rayleigh length range of chamber mould.
Optional, said neodymium glass rod adopts the mode of direct pumping.
Optional, said neodymium glass regenerative amplifier also comprises: the cavity dumping oscillator is suitable for as seed source so that input polarization light to be provided.
Optional, said neodymium glass regenerative amplifier also comprises: optical isolator element is suitable for isolating input polarization light and output polarization light.
Optional, said optical isolator element comprises: the outside film polarizer in regeneration chamber, be suitable for seeing through first kind polarised light, and reflect the second type of polarization light; Faraday polarization apparatus is suitable for incident polarization polarization surface rotation 45 degree; With 1/2nd wave plates, be suitable for incident polarization polarization surface rotation 45 degree.
Optional, the pumping width of said neodymium glass rod is 200～250 μ s, pumping current is 50A～80A.
With respect to prior art, the invention has the advantages that: (1) the present invention makes the Small-scale Self-focusing effect in the neodymium glass be effectively controlled under high power output, and the overall gain of neodymium glass regenerative amplifier reaches 10
8(2) regenerative amplifier light-phototranstormation efficiency has been realized the abundant extraction of effective energy storage basically up to 11%; (3) the output pulse energy is high.
Description of drawings
Fig. 1 is the neodymium glass regenerative amplifier structural representation that provides according to one embodiment of the invention;
Fig. 2 is a hot spot distribution schematic diagram in the chamber of neodymium glass regenerative amplifier among Fig. 1;
Fig. 3 a-3b is in the one embodiment of the invention, cavity dumping seed pulse and regenerative amplifier output pulse waveform figure;
Fig. 4 a-4b is in the one embodiment of the invention, seed pulse and regenerative amplifier output pulse spectrum characteristic sketch map;
Fig. 5 a-5b is in the one embodiment of the invention, the far-field spot sketch map of seed pulse and regenerative amplifier output pulse;
Fig. 6 is in the one embodiment of the invention, the energy stability sketch map of regenerative amplifier output pulse;
Fig. 7 is in the one embodiment of the invention, the Small-scale Self-focusing phenomenon sketch map in the regenerative amplifier;
Fig. 8 is in the one embodiment of the invention, and regenerative amplifier output energy, cavity dumping transfer the Q mode to export the sketch map that concerns between energy and the regenerative amplification theoretical value.
Embodiment
In order to make the object of the invention, technical scheme and advantage clearer, below in conjunction with accompanying drawing, to further explain of the present invention.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
Apparatus structure:
According to one embodiment of the invention, a kind of neodymium glass regenerative amplifier is provided, as shown in Figure 1.This is put the neodymium glass regenerative amplifier and comprises the device that is positioned at main optical path and be positioned at the device from light path that wherein, the device that (1) is positioned at main optical path comprises:
The Nd:YLF of semiconductor laser pulse pumping (ylf crystal of neodymium-doped) cavity dumping oscillator (not shown) is as seed source; The cavity dumping oscillator can be exported narrow pulsewidth, high-octane pulse;
The first film polarizer (TFP1) 101 sees through horizontal polarised light, the reflection orthogonal polarized light;
Faraday polarization apparatus 102 is used for polarization polarization surface rotation 45 degree;
/ 2nd wave plates 103 are used for polarization polarization surface rotation 45 degree; Placing 1/2nd wave plates 103 makes the direction of vibration of incident polarized light and the optical axis included angle of wave plate 103 equal 22.5 degree; Wave plate 103 cooperates with Faraday polarization apparatus 102, and the polarization state of incident polarized light is not changed, and the polarization polarization state of light of outgoing is changed, and for example becomes orthogonal polarized light from horizontal polarization light, or becomes horizontal polarization light from orthogonal polarized light;
The second film polarizer (TFP2) 104 sees through horizontal polarised light, the reflection orthogonal polarized light;
Quarter-wave plate 105;
KD*P bubble Ke Ersi box 106, when it not being applied voltage, it is equivalent to plain film, does not change input polarisation of light characteristic; (for example in a period of time t, pressurize) when it is pressurizeed, KD*P bubble Ke Ersi box 106 is equivalent to a quarter-wave plate; And
First speculum (M1) 107; M1 is the flat mirror of plating 1053nm high-reflecting film;
(2) be positioned at from the device of light path and comprise:
Tertiary membrane polarizer (TFP3) 108 sees through horizontal polarised light, the reflection orthogonal polarized light;
Neodymium glass rod (Nd:glass) 109 is gain modules of laser, is used to provide gain; And
Second speculum (M2) 110; M2 is that curvature is the plano-concave speculum of 5m, concave surface plating 1053nm high-reflecting film.
Nd:YLF (ylf crystal of neodymium-doped) the cavity dumping oscillator that uses the semiconductor laser pulse pumping in the present embodiment is as seed source; The horizontal polarization light wavelength that produces is 1053nm; In other embodiment of the present invention, pulse that can also produce through high pressure wave absorption mode and optical fiber seed source are as the seed source of amplifier.
Continuation is with reference to figure 1; Chamber 200 (being called regeneration chamber 200 again) is meant the round structure of M1 and TFP2 and TFP3 and M2 formation, and chamber 200 specifically comprises: TFP 2104, quarter-wave plate 105, KD*P 106, M1107, TFP3108, neodymium glass rod 109 and M2110.In the present embodiment, first and second speculums (being M1107 and M2110) are not both in order to change the spot size of 106 and 109 positions, to obtain suitable chamber type.
The distribution of internal mold field, chamber with follow the stability criteria in the theoretical and chamber of the transmission matrix in chamber with the relation of chamber mirror (being M1107 and M2110) curvature.
The chamber type is meant the outside layout in regeneration chamber, relates to the distribution of chamber internal schema in essence, and suitable chamber type all has guiding value for the selection of exporting energy, prevention component wear etc.The chamber type is main relevant with the distribution of endovenous laser bundle, mainly considers the spot size size of neodymium glass rod 109 and KD*P crystal 106 positions in the time of design.
In the present embodiment, the design objective of chamber type is that the spot size of neodymium glass rod 109 center positions is designed to 2.5mm, KD*P is placed on the bigger position of spot size, and the structure after the optimization is exactly the spot size corresponding to the different components place.Further, hot spot distributes as shown in Figure 2ly in the chamber, and wherein, M1 and M2 represent two end mirrors in chamber, and D1 represents the spot diameter at KD*P place, and D2 represents the spot diameter at excellent 109 places of neodymium glass.Whole figure representes the hot spot relative size at diverse location place in the chamber, and concrete numerical value is D2=2.5mm, D1=3mm.
In the present embodiment; Total chamber of regeneration chamber design is long to be 4m; The chamber mode diameter that interacvity gain medium (being neodymium glass rod 109) is located is 2.5mm, and electrooptic crystal (being KD*P bubble Ke Ersi box) places near the maximum position of mould hot spot, the chamber of chamber mirror M1, can effectively avoid the KD*P crystal damage.Neodymium glass rod 109 places in the interior Rayleigh length range of chamber mould, so not only can reduce the diffraction loss because of the small size generation of rod, and can effectively avoid the 3ns pulse in the regeneration chamber, to overlap.
To it should be noted that the chamber 200 that frame of broken lines goes out among the figure is the element in order representing to comprise in the chamber, not represent the chamber type.In addition, the chamber type refers to macroscopical profile in chamber, and the chamber mould is meant a kind of spatial distribution of light beam when having laser to exist in the chamber, incorporeity shape.
Continuation is with reference to figure 1, and the KD*P crystal is of a size of 8mm*20mm, and TFP3108 is positioned at the inside in chamber, and gain media is semiconductor laser pulse side pump module (being neodymium glass rod 109).
The device light path:
Light path when utilizing above-mentioned neodymium glass regenerative amplifier to carry out the laser amplification is described below:
Pass TFP1101 from horizontal polarization light (p light) transmission of cavity dumping oscillator output;
Horizontal polarization light through Faraday polarization apparatus 102 rear polarizer faces be rotated 45 the degree, become circularly polarized light, advanced 1/2nd wave plates 103 again after, its plane of polarization be reversed again the rotation 45 the degree, get back to the horizontal polarization attitude;
The horizontal polarization transmittance is passed TFP2104 and is got into regeneration chamber (TFP2104 is positioned at an end in chamber);
(1) when KD*P 106 not during making alive, is equivalent to plain film, quarter-wave plate 105 is passed in the horizontal polarization transmittance, becomes circularly polarized light, and through the reflection of M1107, circularly polarized light becomes orthogonal polarized light after passing through quarter-wave plate 105 once more;
Reflection gets into from light path orthogonal polarized light through TFP2104;
TFP3108 reflection orthogonal polarized light through the reflection of M2110, comes and goes a week to neodymium glass rod 109 in the chamber, reflected back into main optical path by TFP3108;
Orthogonal polarized light is through TFP2104 reflection, and twice through quarter-wave plate 105 again, and by vertically becoming horizontal polarization attitude, horizontal polarization light returns along former road from TFP2 polarization state again, and from TFP1 output, amplification is once in the chamber in pulse.
It should be noted that described " pulse only in the chamber amplify once " is meant to come and go amplifies once, if the amplification number of times that passes through of finger merely, then it is twice.
(2) if KD*P 106 is added quarter-wave voltage (for example pressing time, length was t nanosecond), KD*P 106 is equivalent to a quarter-wave plate;
After twice process of horizontal polarization light quarter-wave plate 105 and KD*P 106 of incident, begin 106 pressurizations to KD*P;
In time t, behind orthogonal polarized light process quarter-wave plate 105 and the KD*P 106, its polarization state becomes horizontal polarization light from orthogonal polarized light;
KD*P 106 and quarter-wave plate 105 are passed through in reflection once more through M1107, and its polarization state becomes orthogonal polarized light from horizontal polarization light;
Thereby luminous energy comes and goes in the chamber for more than enough time, thereby is exaggerated for more than 109 time through the neodymium glass rod.
Wherein, the quarter-wave voltage that on KD*P, applies is 4.9kV, and the damage threshold of KD*P plane of crystal rete is 150MW/cm2.
Interpretation of result:
In the foregoing description, N31 type neodymium doped phosphate glass belongs to four level system, and the laser transition of 1053nm wavelength occurs in neodymium atom
4F
3/2→
4F
11/2Between the energy level, the classical formulas of utilizing people such as Frantz-Nodvik to obtain is calculated the output energy of regenerative amplifier.
The energy density of the amplification pulse behind n gain media of process is with representing as follows:
J
Sto, n=J
Sto, n-1-[J
n-(1-L) J
N-1] (formula 2)
In the above-mentioned formula, the L single-pass loss in the chamber of representing to regenerate, J
Sto, nExpression is stored in the energy density in the gain media.Under the situation of not considering to be excited to absorb, saturation energy density J
SatRepresent as follows:
Wherein, h is a Planck's constant, and c is the light velocity in the vacuum, and σ is the stimulated emission cross section of neodymium glass, and λ is for injecting the centre wavelength of seed pulse.
The initial condition of equation (1) is: during n=0,
J
Sto, 0=J
SatLn (G0) (formula 4)
Wherein, G0=G0 (λ) is the small signal gain at seed light central wavelength lambda place phosphate neodymium glass.For convenience's sake, do not consider the influence of spectral width to amplification characteristic.
In addition, also utilize MATLAB that regenerative amplifier output energy is carried out numerical simulation, the loss by one path coefficients by using experimental measurements of regenerative amplifier in the simulation process: L=0.03, the stimulated emission cross section of neodymium glass: σ=4.0 * 10
-20Cm
2The light velocity is c=3 * 10
8M/s; Wavelength is λ=1053nm; The experiment value that the small signal gain value uses different pumping currents and different pumping width to obtain down, the injection energy value of seed light is 200pJ, and compares the result and the experimental result of theory clearing.
Utilize delicate and the nanosecond synchronous motor temporal characteristics of control chamber turned letter seed source and regenerative amplifier provided by the invention respectively; Wherein, Use delicate synchronous motor to trigger the nanosecond synchronous motor; Delicate synchronous motor is used for controlling respectively the pumping current pulsewidth of seed source and regenerative amplifier gain media, nanosecond synchronous motor be used for the sequential relationship of control chamber turned letter seed source electric light Q and regenerative amplifier electric light Q respectively.Regenerative amplifier time domain waveform that experiment is obtained and spectral characteristic and seed source contrast, and have analyzed the factor that influences the regenerative amplifier long-time stability and the limiting factor of high power output more.
In the experiment, the work repetition rate of neodymium glass rod 109 is 1Hz, and pumping current is 75A; The pumping pulsewidth is 250 μ s; Be 540ns the two-way time of cavity total, and the short purpose of the upper level lifetime of pumping peak pulse duration neodymium glass (340 μ s) is to reduce duty ratio, reduces heat accumulation.
Fig. 3 is that (Fig. 3 a) and the impulse waveform of regenerative amplifier (Fig. 3 b) output for the cavity dumping seed source.Can find out that from Fig. 3 a seed pulse is typical Gaussian pulse, pulse duration is 2.95ns, and waveform is very clean, does not have tangible prepulse and afterpulse.Can find out from Fig. 3 b, above the figure evolutionary process that is laser pulse in the regeneration chamber, the interval between two pulses is the two-way time the chamber in, is about 27ns, figure below is a pulse energy when reaching maximum, the reproduction waveform that the cavity dumping of regenerating is come out.
Fig. 4 is that (Fig. 4 a) and regeneration pulse (Fig. 4 b) spectral characteristic for seed pulse.Can find out that from Fig. 4 a seed source spectrum full width at half maximum is 0.3413nm, centre wavelength is 1052.915nm, and the curve of spectrum is comparatively smooth, no multi-peaks structure.Fig. 4 b is the impulse waveform after the regenerative amplification, compares with seed source spectrum, and centre wavelength is 1052.89nm, and spectrum full width at half maximum (FWHM) is 0.3280nm, and phenomenon does not take place significantly to narrow the spectrum after the regenerative amplification.
Fig. 5 be the cavity dumping seed source (Fig. 5 a) with output (Fig. 5 b) far-field spot of regenerative amplifier.Can find out that from Fig. 5 a the far-field spot center circularity of seed source is better, but is faint ellipticity in Y direction, most of energy all is distributed in Airy disk place, center, does not have significantly other spot, presents the fundamental transverse mode characteristic.Fig. 5 b is the output facula after regenerating; The circularity variation of spot center; This is because seed source output pulse energy has been suffered in the process of amplifying that interference and seed source energy are too high and caused the pattern matching deterioration, can improve the beam quality of regenerative amplification pulse through the energy of further minimizing seed source.In addition, the pulse after the regenerative amplification does not have other spot, still presents the characteristic of fundamental transverse mode, utilizes the knife-edge method match to obtain the beam quality M of regenerative amplifier output pulse
2=1.5.
Fig. 6 is a regenerative amplifier energy stability sketch map; In repetition rate 1Hz, pumping current 75A, seed pulse energy 200pJ, cavity total two-way time is that 540ns is when (being equivalent to come and go in 20 chambeies); About using output energy that relevant company (Coherent) energy meter records regenerative amplifier as 21mJ, the stability of testing 8000 pulses (about 2 hours) is about 2% (rms).The reason of less stable is except the stability influence of seed source, and main relevant with the one way net gain of regenerative amplifier, the one way net gain is high more, and output energy of pulse stability is good more, and stability is directly proportional with maximum output energy.Consider the damage threshold of device, have only the stability of sacrificing pulse energy, under lower gain, obtain the highest energy output, the pulse energy stability of 2% (rms) can satisfy actual requirement of engineering.
Continue to increase pumping current to 80A, the pump pulse width becomes 350 μ s, and the pulse stabilization performance of regenerative amplifier is brought up to about 1%; The output gross energy reaches 40mJ; But the duration of stable output pulse is very short, less than 1 hour, at this moment; In neodymium glass, observe the Small-scale Self-focusing destruction characteristic, as shown in Figure 7.
The Small-scale Self-focusing characteristic is meant that peak power density is near GW/cm
2During magnitude, because the focus characteristics of the segment beam that the nonlinear refractive index of gain media causes, it makes laser beam be divided into some chevilled silks, destroys laser diode, is the principal element that limit laser device power improves.
Fig. 7 left side figure is an observed Small-scale Self-focusing phenomenon under the CCD camera, and a lot of random distribution and the very little bad point of diameter appear in the surface of glass bar.The right figure of Fig. 7 is golden as bad point of the observed part of microscopically, and the diameter that records at bad also finds to increase pumping current and pump pulse width in the experiment between 0.01mm-0.1mm, badly sharply increase of the density of some appearance and size.Therefore; In order to obtain stable pulse output,, select suitable gain by one path to exporting the reasonable control that energy and pumping pulsewidth will be carried out; In the time of the total output of control energy; Make the heat history in the gain media drop to suitable level, thereby can avoid the generation of Small-scale Self-focusing breakoff phenomenon, improve the long-time stability of laser.
Fig. 8 is under the different pumping currents; The energy of regenerative amplifier output, cavity dumping transfer the Q mode to export the contrast between energy and the regenerative amplification Theoretical Calculation result; Wherein, Solid line is represented the output energy of regenerative amplifier, and on behalf of cavity dumping, dotted line transfer the Q mode to export energy, milgraining representation theory result calculated.
As can beappreciated from fig. 8, along with pumping current is increased to 75A by 60A, regenerative amplifier output energy is slightly less than the energy that cavity dumping transfers the Q mode to export; But, when continuing to increase electric current, because the high-gain that pumping produces to 80A; Make the round number of times that amplifies in the chamber reduce, the heat of accumulation increases, and can cause the deterioration of beam quality; Regeneration chamber internal schema coupling variation can be extracted the energy beyond the mould of chamber at the gain media place, thereby; Can occur regeneration pulse output energy in the drawings and surpass the situation that the cavity dumping mode is exported energy, need avoid this situation to take place in the real work.Contrast is found in addition; Below the 75A pumping current, the regenerative amplifier experimental result is slightly less than Theoretical Calculation, and this is understandable; Because Theoretical Calculation supposition beam quality does not worsen; The cavity dumping mode is exported energy, and to be slightly less than calculated value be because due to the error that small signal gain measure to go up exists, whole figure presents the rule of exponential increase basically, explain that energy also has the space of lifting.When pumping current 75A, pumping width 250 μ s, pumping energy 193mJ; The small signal gain 1.65 that measures; Obtaining regenerative amplifier light-phototranstormation efficiency is 11%, and it is about 12% that cavity dumping is transferred Q mode light-phototranstormation efficiency, has realized the abundant extraction of effective energy storage basically.
The above embodiment of the present invention passes through to optimize the structure and the pumping mode in regeneration chamber, the gain by one path of control amplifier, and the Small-scale Self-focusing effect under the high power output in the neodymium glass can be effectively controlled, and is concrete:
(1) design in optimization chamber, the spot size of design is big more at the gain media place, and power density is more little, and therefore, the Small-scale Self-focusing effect is not easy to occur more;
(2) reduce the excellent pumping width of neodymium glass, help reducing the accumulation of heat (because heat is serious more, the Small-scale Self-focusing effect also can be serious more) between pulse and the pulse, for example pumping width value is lower than fluorescence lifetime value (for example 250 μ s);
(3) size of change pumping width and pumping current just can change gain by one path, and gain by one path is big more, and the energy of output is big more, and under the situation of fixed light spot size, the power density at neodymium glass rod place is also just big more; For example the pumping width is 200～250 μ s, and pumping current is 50A～80A.
Integrate requirement: guaranteeing the output energy and do not occurring under the prerequisite of Small-scale Self-focusing, maximizing spot size, minimize the pumping pulsewidth, maximize gain by one path.
According to one embodiment of the invention, the neodymium glass regenerative amplifier has realized that overall gain is greater than 10 under injected pulse energy 200pJ situation
8, always export energy 21mJ, light-phototranstormation efficiency 11%, pulse stability 2% (rms was above 2 hours) and beam quality M
2=1.5, improved the extraction efficiency of energy greatly, practiced thrift cost.
Should be noted that and understand, under the situation that does not break away from the desired the spirit and scope of the present invention of accompanying Claim, can make various modifications and improvement the present invention of above-mentioned detailed description.Therefore, the scope of the technical scheme of requirement protection does not receive the restriction of given any specific exemplary teachings.
Claims (9)
1. neodymium glass regenerative amplifier comprises:
Be successively set on the main optical path:
Regeneration cavity edge polarizer is suitable for transmission first kind polarised light, reflects the second type of polarization light;
Quarter-wave plate is suitable for changing the first kind or the second type of polarization light into circularly polarized light;
Electrooptic crystal is controlled the voltage that applies on it, makes that it is equivalent to plain film when this electrooptic crystal not being applied voltage, and it is equivalent to quarter-wave plate when this electrooptic crystal is applied quarter-wave voltage; With
First speculum; And
Be successively set on the light path:
Regeneration chamber internal polarizer spare is suitable for transmission first kind polarised light, reflects the second type of polarization light, and this regeneration chamber internal polarizer spare receives the polarised light that the other side is reflected each other with said regeneration cavity edge polarizer;
The neodymium glass rod is suitable for providing gain; With
Second speculum;
Wherein, The said first kind polarised light and the second type of polarization light polarization face differ 90 °, and said electrooptic crystal is suitable for controlling the polarization polarization state of light, and it repeatedly is exaggerated through the neodymium glass rod repeatedly; When the polarised light energy reaches required magnitude, said electrooptic crystal is pressurizeed its output.
2. neodymium glass regenerative amplifier according to claim 1, wherein,
Said first speculum is flat mirror;
Said second speculum is the plano-concave speculum;
Wherein, said first speculum cooperates the spot size that is suitable for changing electrooptic crystal and neodymium glass rod position with second speculum, to obtain suitable chamber type.
3. neodymium glass regenerative amplifier according to claim 2, wherein,
The spot size of said neodymium glass rod center position is designed to 2.5mm.
4. neodymium glass regenerative amplifier according to claim 2, wherein,
Said electrooptic crystal places near the maximum position of mould hot spot, the chamber of first speculum;
Said neodymium glass rod places in the interior Rayleigh length range of chamber mould.
5. neodymium glass regenerative amplifier according to claim 2, wherein, said neodymium glass rod adopts the mode of direct pumping.
6. neodymium glass regenerative amplifier according to claim 1 also comprises: the cavity dumping oscillator is suitable for as seed source so that input polarization light to be provided.
7. neodymium glass regenerative amplifier according to claim 6 also comprises: optical isolator element is suitable for isolating input polarization light and output polarization light.
8. neodymium glass regenerative amplifier according to claim 7, wherein, said optical isolator element comprises:
The outside film polarizer in regeneration chamber is suitable for seeing through first kind polarised light, reflects the second type of polarization light;
Faraday polarization apparatus is suitable for incident polarization polarization surface rotation 45 degree; With
/ 2nd wave plates are suitable for incident polarization polarization surface rotation 45 degree.
9. neodymium glass regenerative amplifier according to claim 1, wherein, the pumping width of said neodymium glass rod is 200～250 μ s, pumping current is 50A～80A.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108767629A (en) * | 2018-03-26 | 2018-11-06 | 中国科学院上海光学精密机械研究所 | The active multi-way chirped pulse stretcher of big energy |
| CN109254424A (en) * | 2018-11-15 | 2019-01-22 | 北京莱泽光电技术有限公司 | A kind of electrooptical modulation method, electro-optical modulating device and its application and regenerative amplifier |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6384966B1 (en) * | 1999-11-03 | 2002-05-07 | Time-Bandwidth Products Ag | Multiple pass optical amplifier with thermal birefringence compensation |
| CN101055401A (en) * | 2007-05-25 | 2007-10-17 | 北京工业大学 | Whole-solid kHz picosecond laser pulse regeneration amplifier |
| CN101262111A (en) * | 2008-03-26 | 2008-09-10 | 中国科学院上海光学精密机械研究所 | Nano second laser pulse regeneration amplifier |
| CN101728755A (en) * | 2009-11-22 | 2010-06-09 | 三峡大学 | Linear-cavity optical fiber regenerative amplifier |
| CN102201644A (en) * | 2011-04-07 | 2011-09-28 | 中国科学院上海光学精密机械研究所 | Low-temperature Yb: yttrium aluminum garnet (YAG) regenerative amplifier |
-
2012
- 2012-04-16 CN CN2012101105800A patent/CN102646921A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6384966B1 (en) * | 1999-11-03 | 2002-05-07 | Time-Bandwidth Products Ag | Multiple pass optical amplifier with thermal birefringence compensation |
| CN101055401A (en) * | 2007-05-25 | 2007-10-17 | 北京工业大学 | Whole-solid kHz picosecond laser pulse regeneration amplifier |
| CN101262111A (en) * | 2008-03-26 | 2008-09-10 | 中国科学院上海光学精密机械研究所 | Nano second laser pulse regeneration amplifier |
| CN101728755A (en) * | 2009-11-22 | 2010-06-09 | 三峡大学 | Linear-cavity optical fiber regenerative amplifier |
| CN102201644A (en) * | 2011-04-07 | 2011-09-28 | 中国科学院上海光学精密机械研究所 | Low-temperature Yb: yttrium aluminum garnet (YAG) regenerative amplifier |
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| CN108767629A (en) * | 2018-03-26 | 2018-11-06 | 中国科学院上海光学精密机械研究所 | The active multi-way chirped pulse stretcher of big energy |
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