CN2917037Y - Plasma electrode Pockels cell - Google Patents
Plasma electrode Pockels cell Download PDFInfo
- Publication number
- CN2917037Y CN2917037Y CN 200620034629 CN200620034629U CN2917037Y CN 2917037 Y CN2917037 Y CN 2917037Y CN 200620034629 CN200620034629 CN 200620034629 CN 200620034629 U CN200620034629 U CN 200620034629U CN 2917037 Y CN2917037 Y CN 2917037Y
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- Prior art keywords
- discharge
- electrode
- optical window
- pockers cell
- anode
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- 230000003287 optical effect Effects 0.000 claims abstract description 37
- 238000007789 sealing Methods 0.000 claims abstract description 21
- 239000013078 crystal Substances 0.000 claims description 22
- 230000000740 bleeding effect Effects 0.000 claims description 15
- 239000011521 glass Substances 0.000 claims description 3
- 239000007789 gas Substances 0.000 description 8
- 230000010287 polarization Effects 0.000 description 5
- 239000001307 helium Substances 0.000 description 3
- 229910052734 helium Inorganic materials 0.000 description 3
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- IXSZQYVWNJNRAL-UHFFFAOYSA-N etoxazole Chemical compound CCOC1=CC(C(C)(C)C)=CC=C1C1N=C(C=2C(=CC=CC=2F)F)OC1 IXSZQYVWNJNRAL-UHFFFAOYSA-N 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 230000009022 nonlinear effect Effects 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
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- Plasma Technology (AREA)
Abstract
The utility model provides a plasma electrode pockels cell. The pockels cell comprises a pockels cell shell, a discharge cavity, a discharge electrode and an optical window. The pockels cell shell and the discharge cavity are both cylindrical, the cathode discharge electrode and the anode discharge electrode are both half-moon-shaped, the cathode discharge electrode is in a hollow groove shape, and a plurality of discharge holes are arranged on the anode discharge surface. The shell of the Pockels cell is designed in a compact integrated mode, so that the sealing performance of the Pockels cell is improved, and the difficulty in assembling the Pockels cell is reduced. The arrangement of the cathode and the anode discharge electrodes can meet the use requirement of a Pockels cell with a smaller caliber, and simultaneously, the gas discharge is more stable. The utility model discloses a plasma electrode pockels cell has characteristics such as low-loss, high spatial uniformity, high damage threshold value.
Description
Technical field
The utility model belongs to the high power solid state laser field, is specifically related to a kind of plasma-electrode pockels cells (pepc).
Background technology
Existing ring electrode Pockers cell, employing be bar-shaped KDP crystal, in the two ends of crystal bar cover upper electrode rings, the switching pulse that adds high pressure on this ring is realized the control to the linear polarization polarization state of light by the KDP crystal.Because the electric field of ring electrode structure is inhomogeneous, always greater than the field intensity on the central shaft, if require on the crystal electric field inhomogeneities little by 2%, then crystal thickness and diameter ratio must be greater than 1 in the field intensity of cylinder crystal edge.Therefore, build bore with the ring electrode Pockers cell and will cause serious light absorption and nonlinear effect greater than the electrooptical switching of 100mm.
Plasma-electrode pockels cells (pepc) is that the high conductivity, the transparentpiston that utilize the low density gas discharge of crystal both sides to form are made electrode, can make the heavy caliber Pockers cell with thin crystal, has advantages such as low-loss, high spatial uniformity, high damage threshold.
The basic principle of plasma-electrode pockels cells (pepc) is: form the high-conductivity transparent homogeneous plasma by the heavy-current discharge to inert gas respectively in the airtight discharge cavity of wide aspect ratio KDP crystal both sides, the plasma of this moment promptly is equivalent to the electrode of a high conduction, when discharging current reaches maximum in the Pockers cell, the switching pulse that adds high pressure on two plasma electrodes is realized the control to the linear polarization polarization state of light by the KDP crystal.
During plasma-electrode pockels cells (pepc) work, between the heavy-current discharge of switching pulse and formation plasma strict sequential is arranged.Because gas discharge has uncertainty and causes the formation of high conductivity plasma to have uncertainty, the result that this uncertainty is brought is that rocking of plasma discharge reaches several microseconds, can't satisfy instructions for use.
The article (Performance oflarge-aperture optical switches for high-energy inertial-confinement fusion lasers@APPLIED OPTICS@Vol.34, No.24@20 August 1995) that name is called " the heavy caliber optical switch performance that is used for high energy inertial confinement fusion laser " discloses a kind of heavy caliber (greater than the plasma-electrode pockels cells (pepc) of 30cm * 30cm).This Pockers cell housing adopts the sandwich-type design, and sealing surface is many, is unfavorable for the sealing of Pockers cell.The cathodic discharge electrode adopts the plane magnetic control Cathode Design, and the cathodic discharge electrode surface is a high purity graphite.This plane magnetic control negative electrode involves great expense, and kind electrode structure determined that its volume is bigger, can't be used for more small-bore (as the plasma-electrode pockels cells (pepc) of 8cm * 8cm).
Summary of the invention
In order to overcome the deficiency that the Pockers cell sealing property is relatively poor and the sparking electrode volume is big, cost is high in the prior art, the utility model provides a kind of plasma-electrode pockels cells (pepc) of integrated shrunk type.Can improve the vacuum seal ability of Pockers cell, the difficulty in reduction Pockers cell dress school.The yin, yang sparking electrode the user demand that can satisfy more small-bore Pockers cell is set, make that simultaneously gas discharge is more stable.
A kind of plasma-electrode pockels cells (pepc) of the present utility model comprises that Pockers cell housing, Pockers cell middle part are used to inlay square hole, discharge cavity, cathodic discharge electrode, anode discharge electrode, cathode electrode connecting rod, anode electrode connecting rod, suction nozzle, the mouth of bleeding, optical window sealing ring and baffle ring, optical window connecting ring and pressure ring, the optical window of KDP crystal.The Pockers cell housing adopts monolithic glass to make, and whole Pockers cell and discharge cavity are cylindrical.Its annexation is that the KDP crystal is bonding to be embedded in the square hole of Pockers cell housing middle part; The two sides of KDP crystal are respectively arranged with two discharge cavities; Each discharge cavity is respectively arranged with an optical window outward; Be provided with position relative a pair of cathodic discharge electrode and anode discharge electrode in the discharge cavity; The cathodic discharge electrode is fixed by cathode electrode connecting rod and Pockers cell housing, the anode discharge electrode is fixed by anode electrode connecting rod and Pockers cell housing, two suction nozzles and two mouths of bleeding are separately positioned in four apertures about the Pockers cell housing, suction nozzle and the mouth of bleeding be one group and be connected with a discharge cavity, and another suction nozzle and the mouth of bleeding are one group and are connected with another discharge cavity; Two optical window sealing rings and baffle ring are separately positioned on two discharge cavity peripheries, closely contact with optical window respectively.Two optical window connecting rings and pressure ring are separately positioned on the outer of the Pockers cell housing of two discharge cavity one sides.
The cathodic discharge electrode and the anode discharge electrode shape that are provided with in the KDP crystal both sides discharge cavity in the plasma-electrode pockels cells (pepc) of the present utility model are semilune, the cathodic discharge electrode is set to the hollow recess structure, and the degree of depth of groove is 1: 1 with the ratio of width; The anode discharge electrode surface is provided with several discharge apertures.
The housing of plasma-electrode pockels cells (pepc) of the present utility model adopts and tightens integrated design, the sealing surface of Pockers cell is than the sealing surface much less of the design of the sandwich-type in the prior art, help the raising of Pockers cell sealing property, and help the dress school of Pockers cell.The anode discharge electrode surface is provided with several discharge apertures, and the design of yin, yang sparking electrode has solved the problem that big, the baroque plane magnetic control negative electrode of volume can not be used for more small-bore Pockers cell, has reduced the electrode cost, and has obtained stable gas discharge.Plasma-electrode pockels cells (pepc) of the present utility model has characteristics such as low-loss, high spatial uniformity, high damage threshold.
Description of drawings
The utility model is described in further detail below in conjunction with accompanying drawing:
Fig. 1 is the embodiment generalized section of plasma-electrode pockels cells (pepc) of the present utility model
Fig. 2 is the vertical view of the embodiment of plasma-electrode pockels cells (pepc) of the present utility model
Fig. 3 is an anode sparking electrode end view among the embodiment of plasma-electrode pockels cells (pepc) of the present utility model
Fig. 4 is a cathodic discharge electrode end view among the embodiment of plasma-electrode pockels cells (pepc) of the present utility model
Fig. 5 is a cathodic discharge electrode vertical view among the embodiment of plasma-electrode pockels cells (pepc) of the present utility model
Among the figure, 1. Pockers cell housing 11. square hole cathodic discharge electrode (2,12) anode discharge electrode (3,13) cathode electrode connecting rod (4,14) anode electrode connecting rod (5, the 15) mouth of bleeding (6,16) suction nozzle (7,17) optical window sealing rings and baffle ring (8,18) optical window connecting ring and pressure ring (9,19) optical window (10,20) discharge cavity (30,40)
Embodiment
In Fig. 1～4, a kind of plasma-electrode pockels cells (pepc) of the present utility model comprises that Pockers cell housing 1, Pockers cell middle part are used to inlay square hole 11, discharge cavity (30,40), cathodic discharge electrode (2,12), anode discharge electrode (3,13), cathode electrode connecting rod (4,14), anode electrode connecting rod (5,15), the mouth of bleeding (6,16), suction nozzle (7,17), optical window sealing ring and baffle ring (8,18), optical window connecting ring and pressure ring (9,19), the optical window (10,20) of KDP crystal.Pockers cell housing 1 adopts monolithic glass to make, and whole Pockers cell 1 and discharge cavity (30,40) are cylindrical.The KDP crystal is embedded in the Pockers cell housing 1 middle part square hole 11 by silica gel is bonding; The two sides of KDP crystal are respectively arranged with discharge cavity 30 and discharge cavity 40; Discharge cavity 30 is outside equipped with optical window 10, and discharge cavity 40 is outside equipped with optical window 20; Be provided with relative cathodic discharge electrode 2 in position and anode discharge electrode 3 in the discharge cavity 30, be provided with relative cathodic discharge electrode 12 in position and anode discharge electrode 13 in the discharge cavity 40; Cathodic discharge electrode 2 is fixing with Pockers cell housing 1 by cathode electrode connecting rod 4, and cathodic discharge electrode 12 is fixing with Pockers cell housing 1 by cathode electrode connecting rod 14; Anode discharge electrode 3 is fixing with Pockers cell housing 1 by anode electrode connecting rod 5, and anode discharge electrode 13 is fixing with Pockers cell housing 1 by cathode electrode connecting rod 15; Bleed mouth (6,16), suction nozzle (7,17) be separately positioned on the Pockers cell housing 1 about four apertures in, the mouth 6 of bleeding is connected with discharge cavity 30 with suction nozzle 7, the mouth 16 of bleeding is connected with discharge cavity 40 with suction nozzle 17; Optical window sealing ring and baffle ring (8,18) are separately positioned on discharge cavity (30,40) periphery, and optical window sealing ring and baffle ring 8 closely contact with optical window 10, and optical window sealing ring and baffle ring 18 closely contact with optical window 20; Optical window connecting ring and pressure ring 9 are arranged on the outer of the Pockers cell housing 1 of discharge cavity 30 1 sides, and optical window connecting ring and pressure ring 19 are arranged on the outer of the Pockers cell housing 1 of discharge cavity 40 1 sides.The cathodic discharge electrode (2,3) and anode discharge electrode (3, the 13) shape that are provided with in the middle discharge cavity of plasma-electrode pockels cells (pepc) of the present utility model (30,40) are semilune, cathodic discharge electrode (2,12) all is set to the hollow recess structure, and the degree of depth of groove is 1: 1 with the ratio of width; Anode discharge electrode (3,13) surface all is provided with several discharge apertures.
Among Fig. 2, overlook on the direction, the mouth 16 of bleeding overlaps with the mouth 6 of bleeding, and suction nozzle 17 overlaps with the mouth 7 of bleeding.
Cathodic discharge electrode and anode discharge electrode are made by stainless steel.
The course of work of plasma-electrode pockels cells (pepc) of the present utility model is as follows: as shown in FIG., suction nozzle (7,17) connects the helium gas charging system, the mouth (6,16) of bleeding connects the vacuum unit, and airtight discharge cavity (30,40) is under the dynamic equilibrium air pressure of 50Pa under helium gas charging system, the effect of vacuum unit.A pair of positive and negative utmost point sparking electrode (3,13) and (2,12) in the discharge cavity (30,40) connect the both positive and negative polarity of plasma pulse generator respectively.Before the plasma discharge electric current arrives 300 milliseconds, the yin, yang sparking electrode of discharge cavity (30,40) is coupled with preionization pulse that pulsewidth is 500 milliseconds of amplitude 1.5kV so that the helium initial ionization in the discharge cavity (30,40).When the plasma discharge pulse arrives, gas in the discharge cavity is breakdown fully at once, when the plasma discharge electric current reaches maximum, the conductivity of plasma reaches the highest in the chamber, plasma electrode forms, at this moment, switching pulse is added on the interior plasma electrode of discharge cavity (30,40), thereby realizes the control to the linearly polarized light polarization state of passing through the KDP crystal.
The housing of plasma-electrode pockels cells (pepc) of the present utility model adopts the shrunk type integrated design, the sealing surface of Pockers cell is than few many of the sealing surface of sandwich-type design in the prior art, help the raising of Pockers cell sealing property, and help the dress school of Pockers cell.The anode discharge electrode surface is provided with several discharge apertures, and the design of yin, yang sparking electrode has solved the problem that big, the baroque plane magnetic control negative electrode of volume can not be used for more small-bore Pockers cell, has reduced the electrode cost, and has obtained stable gas discharge.
Claims (3)
1. a plasma-electrode pockels cells (pepc) comprises that Pockers cell housing (1), Pockers cell middle part are used to inlay the square hole (11) of KDP crystal; It is characterized in that: also comprise discharge cavity (30,40), cathodic discharge electrode (2,12), anode discharge electrode (3,13), cathode electrode connecting rod (4,14), anode electrode connecting rod (5,15), the mouth of bleeding (6,16), suction nozzle (7,17), optical window sealing ring and baffle ring (8,18), optical window connecting ring and pressure ring (9,19), optical window (10,20); Its annexation is that the KDP crystal is bonding to be embedded in Pockers cell housing (1) the middle part square hole (11); The both sides of KDP crystal are respectively arranged with discharge cavity (30) and discharge cavity (40); Discharge cavity (30) is outside equipped with optical window (10), and discharge cavity (40) is outside equipped with optical window (20); Be provided with relative cathodic discharge electrode (2) in position and anode discharge electrode (3) in the discharge cavity (30), be provided with relative cathodic discharge electrode (12) in position and anode discharge electrode (13) in the discharge cavity (40); Cathodic discharge electrode (2) is fixing by cathode electrode connecting rod (4) and Pockers cell housing (1), and cathodic discharge electrode (12) is fixing by cathode electrode connecting rod (14) and Pockers cell housing (1); Anode discharge electrode (3) is fixing by anode electrode connecting rod (5) and Pockers cell housing (1), and anode discharge electrode (13) is fixing by cathode electrode connecting rod (15) and Pockers cell housing (1); Bleed mouth (6,16), suction nozzle (7,17) is separately positioned in four apertures about Pockers cell housing (1), and the mouth of bleeding (6) is connected with discharge cavity (30) with suction nozzle (7), and the mouth of bleeding (16) is connected with discharge cavity (40) with suction nozzle (17); Optical window sealing ring and baffle ring (8,18) are separately positioned on discharge cavity (30,40) periphery, and optical window sealing ring and baffle ring (8) closely contact with optical window (10), and optical window sealing ring and baffle ring (18) closely contact with optical window (20); Optical window connecting ring and pressure ring (9) are arranged on the outer of the Pockers cell housing (1) of discharge cavity (30) one sides, and optical window connecting ring and pressure ring (19) are arranged on the outer of the Pockers cell housing (1) of discharge cavity (40) one sides.
2. plasma-electrode pockels cells (pepc) according to claim 1 is characterized in that: described Pockers cell housing (1) adopts monolithic glass to make, and whole Pockers cell (1) and discharge cavity (30,40) are cylindrical.
3. plasma-electrode pockels cells (pepc) according to claim 1, it is characterized in that: the cathodic discharge electrode (2,3) and anode discharge electrode (3, the 13) shape that are provided with in the described KDP crystal both sides discharge cavities (30,40) are semilune, cathodic discharge electrode (2,12) all is set to the hollow recess structure, and the degree of depth of groove is 1: 1 with the ratio of width; Anode discharge electrode (3,13) surface all is provided with several discharge apertures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620034629 CN2917037Y (en) | 2006-06-14 | 2006-06-14 | Plasma electrode Pockels cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620034629 CN2917037Y (en) | 2006-06-14 | 2006-06-14 | Plasma electrode Pockels cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2917037Y true CN2917037Y (en) | 2007-06-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620034629 Expired - Fee Related CN2917037Y (en) | 2006-06-14 | 2006-06-14 | Plasma electrode Pockels cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2917037Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104638508A (en) * | 2015-03-16 | 2015-05-20 | 中国工程物理研究院激光聚变研究中心 | Longitudinal pockels cell employing ionic liquid as electrode |
| CN104701132A (en) * | 2015-03-17 | 2015-06-10 | 中国工程物理研究院激光聚变研究中心 | Large-diameter face-shaped unidirectional flashing xenon lamp |
| CN108480803A (en) * | 2018-04-11 | 2018-09-04 | 西安工业大学 | Big aspect ratio depth processing special holes cathode |
| CN109387951A (en) * | 2018-12-07 | 2019-02-26 | 中国工程物理研究院激光聚变研究中心 | The Alignment technology of optical device dress smoothing platform and single port diameter electrooptical switching |
-
2006
- 2006-06-14 CN CN 200620034629 patent/CN2917037Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104638508A (en) * | 2015-03-16 | 2015-05-20 | 中国工程物理研究院激光聚变研究中心 | Longitudinal pockels cell employing ionic liquid as electrode |
| CN104638508B (en) * | 2015-03-16 | 2018-07-27 | 中国工程物理研究院激光聚变研究中心 | A kind of longitudinal Pockers cell using ionic liquid as electrode |
| CN104701132A (en) * | 2015-03-17 | 2015-06-10 | 中国工程物理研究院激光聚变研究中心 | Large-diameter face-shaped unidirectional flashing xenon lamp |
| CN108480803A (en) * | 2018-04-11 | 2018-09-04 | 西安工业大学 | Big aspect ratio depth processing special holes cathode |
| CN109387951A (en) * | 2018-12-07 | 2019-02-26 | 中国工程物理研究院激光聚变研究中心 | The Alignment technology of optical device dress smoothing platform and single port diameter electrooptical switching |
| CN109387951B (en) * | 2018-12-07 | 2023-09-22 | 中国工程物理研究院激光聚变研究中心 | Assembling and calibrating process for single-aperture electro-optical switch |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070627 Termination date: 20140614 |
|
| EXPY | Termination of patent right or utility model |