CN204947316U - A kind of sheet laser amplifier - Google Patents
A kind of sheet laser amplifier Download PDFInfo
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- CN204947316U CN204947316U CN201520774318.5U CN201520774318U CN204947316U CN 204947316 U CN204947316 U CN 204947316U CN 201520774318 U CN201520774318 U CN 201520774318U CN 204947316 U CN204947316 U CN 204947316U
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- lamp box
- lamp
- laser amplifier
- box
- gain media
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Abstract
The utility model discloses a kind of sheet laser amplifier, comprise sheet case, lamp box and framework, described case internal fixtion is connected with gain media, described lamp box comprises xenon lamp and partition glass, described case comprises upper surface, lower surface, the plane of incidence, exit facet and 2 pump face, described lamp box is 2, be respectively the first lamp box and the second lamp box, described case is fixedly connected on the center of described framework, described first lamp box and the second lamp box are relative with 2 pump face of described case respectively, described lamp box is fixedly connected with described framework, the xenon lamp of described first lamp box and the xenon lamp of the second lamp box are asymmetric dislocation arrangement along laser main optical path direction, laser amplifier of the present utility model can suppress gain turned-down edge effect, compact conformation, small signal gain coefficient is large, flatness is good.
Description
Technical field
The utility model relates to high power solid state laser technical field, in particular to a kind of sheet laser amplifier.
Background technology
In the high power short pulse laser development course of more than 30 year, laser driver technology obtains development at full speed, particularly under the excitation of laser inertial confinement fusion technology, large quantity research has all been carried out to the ultra high power laser driver of various scale and various level in the important unit of world many countries and laboratory, Mel laboratory, Osaka, Japan university laser engineering center etc. in such as U.S.'s livermore laboratory, France.Wherein, the high-power laser driver of U.S.'s livermore laboratory development represents the highest level in the world, from the seventies, successively built the solid state laser systems such as Janus, Argus, Shiva, Nova and NIF, heavy caliber sheet laser amplifier achieves great development.In these laser drivers, a very important module is sheet laser amplifier, the longitudinal energy flow transmission transfer problem of its main solving device, it is the core of whole driver, the quality of its performance directly affects output energy and the power of device, to the overall performance important of system.
The important parameter weighing disk amplifier has amplifier size, small signal gain coefficient, flatness etc., larger on amplifier size impact is the pumping source of amplifier, the pumping source of sheet laser amplifier conventional at present mainly contains xenon lamp and laser diode, laser diode have size little, be easy to the advantage such as integrated, but because technique is immature, expensive, the uniformity of laser diode are difficult to do very well, although xenon lamp volume is large, but low price is the main selection of current sheet laser amplifier.
Because sheet laser amplifier needs high-gain to export, in high-gain situation, due to the existence of amplified spontaneous emission effect, laser amplifier gain can be caused to occur obvious turned-down edge phenomenon, make the wavefront distortion of laser after amplifier obvious, have impact on the use of laser amplifier.
Utility model content
For above-mentioned problems of the prior art, the utility model provides a kind of sheet laser amplifier suppressing gain turned-down edge effect, and this laser amplifier configurations is compact, and small signal gain coefficient is large, and flatness is good.
For achieving the above object, the utility model provides following technical scheme:
A kind of sheet laser amplifier, comprise sheet case, lamp box and framework, described case internal fixtion is connected with gain media, described lamp box comprises xenon lamp and partition glass, described case comprises upper surface, lower surface, the plane of incidence, exit facet and 2 pump face, described lamp box is 2, be respectively the first lamp box and the second lamp box, described case is fixedly connected on the center of described framework, described first lamp box and the second lamp box are relative with 2 pump face of described case respectively, described lamp box is fixedly connected with described framework, the xenon lamp of described first lamp box and the xenon lamp of the second lamp box are asymmetric dislocation arrangement along laser main optical path direction.
Further, described gain media slant setting, the angle of gain medium facet normal and incident laser is Brewster's angle.
Further, described first lamp box is concordant near the edge of exit facet with gain media, described second lamp box is concordant near the edge of the plane of incidence with gain media, and gain media is less than the edge of gain media near the plane of incidence to the distance of the first lamp box near the edge of exit facet to the distance of the first lamp box.
Further, described xenon lamp is 9, and equidistantly arranges.
Further, 6 described xenon lamp series connection are a discharge loop, and the operating voltage of described discharge loop is 20.9-23.1kV/ loop, and electric capacity is 349-385 μ F/ loop, and inductance is 66.5-73.5 μ H/ loop, and resistance is 93-103m Ω/loop.
Further, described lamp box also comprises the first reflector, and except the side at partition glass place, the medial surface of described lamp box is provided with described first reflector.
Further, described first reflector surface is coated with SiO
2rete.
Further, the inner surface of described partition glass and outer surface are coated with anti-reflection broadband chemical films respectively.
Further, described case also comprises press box, and described press box is fixedly connected with the end face of gain media, and described laser amplifier also comprises the second reflector, and described second reflector is between gain media and press box.
Further, described laser amplifier also comprises 2 end mirrors, and 2 described end mirrors are fixedly connected with described framework, and 2 described end mirrors are relative with the plane of incidence and exit facet respectively, and the surface normal of described end mirror and the angle of incident laser are 0.8-1.2 °.
The beneficial effects of the utility model are as follows:
1, the xenon lamp of the first lamp box and the xenon lamp of the second lamp box are asymmetric dislocation arrangement, improve the luminous efficiency of uniformity that xenon lamp radiation light distributes at gain medium facet and xenon lamp, the gain turned-down edge phenomenon that simultaneously inhibit high-gain to cause, improves the flatness of disk amplifier;
2, in lamp box except all the other each of partition glass face and the both ends of the surface of sheet case are equipped with reflector, add the reflection to pump light, make pump light farthest reflex to gain medium facet, improve pumping efficiency;
3, reflector surface is coated with SiO
2rete, has the effect of the silver coating protected inside it, prevents the reflectance reduction phenomenon that silver coating sulfuration causes, ensure that the stability of sheet laser amplifier long-term work;
4, by the setting of position between lamp box and gain media, and the setting of position between reflecting plate and gain media, make whole sheet laser amplifier structure more compact, the efficiency of transmission of whole pump cavity improves more than 10% simultaneously;
5, the surface normal of end mirror becomes small angle with incident laser, and 2 end mirror distributions in " eight " word, the self-oscillation that effectively inhibit end mirror residual reflection to cause, ensure that the reliability service of whole disk amplifier.
Accompanying drawing explanation
Fig. 1 is overall structure of the present utility model signal explosive view;
Fig. 2 is of the present utility model case and lamp box vertical view;
Fig. 3 is of the present utility model box structure schematic diagram;
Fig. 4 is end mirror of the present utility model arrangement schematic diagram.
In figure: 1-sheet case, 11-gain media, the 111-the first vertical edge, 112-the second vertical edge, 12-press box, 13-support bar, 2-the first lamp box, 21-partition glass, 23-xenon lamp, 3-the second lamp box, 4-end mirror, the normal of 41-end mirror, 5-end mirror, 6-frame base, the 7-the second reflector, 8-incident laser.
Embodiment
The technical solution of the utility model is understood better in order to make those skilled in the art; below in conjunction with accompanying drawing of the present utility model; clear, complete description is carried out to the technical solution of the utility model; based on the embodiment in the application; other roughly the same embodiment that those of ordinary skill in the art obtain under the prerequisite not making creative work, all should belong to the scope of the application's protection.
Embodiment one:
As shown in Figure 1, a kind of sheet laser amplifier, comprise sheet case 1,2 lamp boxes, framework, end mirror 4, end mirror 5, second reflector 7 (not shown), gain media 11 is fixedly connected in sheet case 1, gain media 11 is sheet, sheet case 1 comprises upper surface, lower surface, the plane of incidence, exit facet and 2 pump face, and gain media 11 is in the tilted setting of sheet case 1, and the angle of gain media 11 surface normal and incident laser 8 is Brewster's angle.Sheet case 1 is fixedly connected on the center of framework, and it is relative with 2 pump face of sheet case 1 respectively with the second lamp box 3 with the second lamp box 3, first lamp box 2 that 2 lamp boxes are respectively the first lamp box 2, and lamp box is fixedly connected with framework.End mirror 4 is fixedly connected with described framework with end mirror 5, and end mirror 4 is relative with the plane of incidence, and end mirror 5 is relative with exit facet.Lamp box comprises xenon lamp 23, first reflector and partition glass 21, and except the side at partition glass 21 place, the medial surface of lamp box is equipped with the first reflector, and the coating of the first reflector is three layers, from inside to outside successively: copper film layer, silver film and SiO
2rete.Copper film layer thickness is 10 μm, and silver film thickness is not less than 40 μm, and coating requires that firmly to avoid at strong xenon lamp irradiation and to come off in the processes such as lamp box maintenance, silver-plated rear surface is polished to minute surface, to silver-coated reflector coating SiO
2rete, prevents silver coating sulfuration from causing reflectance reduction, and the inner surface of partition glass 21 and outer surface are all coated with anti-reflection broadband chemical films, and broadband refers to the band from ultraviolet light to infrared light, makes xenon lamp mean transmissivity be greater than 94%.The setting of the first reflector adds the reflection to xenon lamp, makes xenon lamp farthest reflex to gain media 11 surface, thus improves pumping efficiency.Sheet laser amplifier of the present utility model is locking device, and the upper surface of framework is provided with nitrogen influx, and lower surface is provided with nitrogen flow export and electric interfaces, cools gain media and whole laser amplifier for passing into nitrogen.For framework, in figure, merely illustrate frame base 6.
As shown in Figure 2, the xenon lamp 23 of the first lamp box 2 and the xenon lamp 23 of the second lamp box 3 are asymmetric dislocation arrangement along laser main optical path direction, the midpoint being centrally located at two xenon lamps 23 of the second corresponding lamp box 3 of the xenon lamp 23 of the first lamp box 2, the midpoint being centrally located at two xenon lamps 23 of the first corresponding lamp box 2 of the xenon lamp 23 of the second lamp box 3, gain media 11 comprises the first vertical edge 111 and the second vertical edge 112, the side of the first lamp box 2 is concordant with the edge near exit facet of gain media 11, namely the side of the first lamp box 2 and the second vertical edge 112 are positioned at same plane, second lamp box 3 is concordant with the edge near the plane of incidence of gain media 11, namely the second lamp box 3 and the first vertical edge 111 are positioned at same plane, the distance of the first vertical edge 111 to the first lamp box 2 is less than the distance of the second vertical edge 112 to the first lamp box 2.If the first vertical edge 111 and the second vertical edge 112 are not parallel with the first lamp box 2, so, the end points of the first vertical edge 111 and the end points of the second vertical edge 112 of distance herein calculates.Xenon lamp 23 in each lamp box is 9, and equidistantly arranges.6 xenon lamp 23 series connection are a discharge loop, and two lamp boxes use 3 to put a loop altogether, and the operating voltage of discharge loop is 20.9-23.1kV/ loop, and electric capacity is 349-385 μ F/ loop, and inductance is 66.5-73.5 μ H/ loop, and resistance is 93-103m Ω/loop.
As shown in Figure 3, sheet case 1 also comprises press box 12 and support bar 13, and press box 12 is fixedly connected with the horizontal edge of gain media 11, and the second reflector 7 is between gain media 11 and press box 12, and the second reflector 7 is upper and lower 2.Prior art is generally be placed on by press box 12 between gain media 11 and the second reflector 7, this project organization is loose, cause the unnecessary waste of xenon lamp, the utility model effectively can reduce the size of sheet laser amplifier, reduce the distance of the second reflector 7 apart from gain media 11 simultaneously, the reflection of the second reflector 7 pairs of xenon lamps can be increased, improve the utilance of xenon lamp.
As shown in Figure 4, the normal 41 of end mirror is 0.8-1.2 ° with the angle β of incident laser 8, be preferably 1 °, the arrangement in "eight" shape of end mirror 4 and end mirror 5, arranging the transmitance impact of incident laser 8 of this angle is not obvious, but the self-oscillation that can effectively suppress end mirror residual reflection to cause, ensure that the reliability service of whole disk amplifier.The surface of end mirror 4 and end mirror 5 is coated with the anti-reflection deielectric-coating of incident laser 8.
In the present embodiment, gain media 11 is neodymium glass, and the selection of the size of neodymium glass will consider that laser bore and neodymium glass refractive index are to the horizontal offset of incident laser 8.As shown in Figure 2, under incident laser 8 incides neodymium glass situation with Brewster's angle θ=arctan (n), the refractive index due to neodymium glass can cause incident laser 8 to produce skew in the horizontal direction, and the size of offset Δ is:
Wherein d is the thickness of neodymium glass, and n is the refractive index of neodymium glass.
So consider and install the size that neodymium glass is bound edge, the length l that can obtain neodymium glass should meet relational expression below:
Wherein, a is the horizontal size of laser bore, and the present embodiment is 400mm × 400mm.The size (length x width x thickness) of neodymium glass elects 810mm × 460mm × 40mm (containing bound edge) as, neodymium glass is positioned in main optical path with Brewster's angle, incident laser with brewster angle incidence to neodymium glass, its installation environment cleanliness factor is better than 100 grades, causes laser damage to avoid surface attachment impurity particle.
In the present embodiment, preferably xenon lamp 23 internal diameter is 41mm, and xenon lamp 23 air pressure is 200Torr, and electric discharge arc length is 450mm, and the operating voltage of xenon lamp 23 discharge loop is 22kV/ loop, and electric capacity is 355 μ F/ loops, and inductance is 68 μ H/ loops, and resistance is 99m Ω/loop.
The pumping area being projeced into lamp box direction due to neodymium glass (except bound edge) is about 784mm × 434mm, and therefore 9 xenon lamps 23 are equidistantly arranged at pumping area length direction (784mm),
In the utility model, each lamp box is made up of 9 xenon lamps 23, every 6 xenon lamps 23 are connected into a loop, xenon lamp 23 in same xenon lamp group is equidistantly arranged, the xenon lamp 23 of the first lamp box 2 and the xenon lamp 23 of the second lamp box 3 are in asymmetric dislocation arrangement, add specific xenon lamp 23 power supply parameter, improve the luminous efficiency of uniformity that xenon lamp 23 radiant light distributes at gain medium facet and xenon lamp, the gain turned-down edge phenomenon that simultaneously inhibit high-gain to cause, and then improve the flatness of disk amplifier.
The course of work of sheet laser amplifier is: first charge to the current supply circuit module of laser amplifier, and after electricity to be charged reaches requirement, supply module is to the electric discharge of xenon lamp loop, and electric energy conversion is that optical energy irradiation is on neodymium glass by xenon lamp 23; Neodymium ion absorbs xenon lamp luminous energy, by forming population inversion between the upper and lower energy level of the laser of radiation transistion in gain media 11, makes gain media 11 obtain enough energy storage; When energy storage is to sometime, when incident laser 8 pulse is by neodymium glass, neodymium ion to low-lying level stimulated radiation transition, realizes the amplification process of laser by high level.
After laser amplifier runs, the nitrogen that neodymium glass adopts cleanliness factor to be better than 100 grades is purged, to promote the recovery of thermal distoftion and to avoid aerosol in the attachment on its surface, purge lamp box with air simultaneously, promote that its heat is recovered.
In addition, be to be understood that, although this specification is described according to execution mode, but not each execution mode only comprises an independently technical scheme, this narrating mode of specification is only for clarity sake, those skilled in the art should by specification integrally, and the technical scheme in each embodiment also through appropriately combined, can form other execution modes that it will be appreciated by those skilled in the art that.
Claims (10)
1. a sheet laser amplifier, comprise sheet case, lamp box and framework, described case internal fixtion is connected with gain media, described lamp box comprises xenon lamp and partition glass, it is characterized in that, described case comprises upper surface, lower surface, the plane of incidence, exit facet and 2 pump face, described lamp box is 2, be respectively the first lamp box and the second lamp box, described case is fixedly connected on the center of described framework, described first lamp box and the second lamp box are relative with 2 pump face of described case respectively, described lamp box is fixedly connected with described framework, the xenon lamp of described first lamp box and the xenon lamp of the second lamp box are asymmetric dislocation arrangement along laser main optical path direction.
2. sheet laser amplifier according to claim 1, is characterized in that, described gain media slant setting, and the angle of gain medium facet normal and incident laser is Brewster's angle.
3. sheet laser amplifier according to claim 2, it is characterized in that, described first lamp box is concordant near the edge of exit facet with gain media, described second lamp box is concordant near the edge of the plane of incidence with gain media, and gain media is less than the edge of gain media near the plane of incidence to the distance of the first lamp box near the edge of exit facet to the distance of the first lamp box.
4. sheet laser amplifier according to claim 1, is characterized in that, described xenon lamp is 9, and equidistantly arranges.
5. sheet laser amplifier according to claim 4, it is characterized in that, 6 described xenon lamp series connection are a discharge loop, the operating voltage of described discharge loop is 20.9-23.1kV/ loop, electric capacity is 349-385 μ F/ loop, inductance is 66.5-73.5 μ H/ loop, and resistance is 93-103m Ω/loop.
6. sheet laser amplifier according to claim 5, is characterized in that, described lamp box also comprises the first reflector, and except the side at partition glass place, the medial surface of described lamp box is provided with described first reflector.
7. sheet laser amplifier according to claim 6, is characterized in that, described first reflector surface is coated with SiO
2rete.
8. sheet laser amplifier according to claim 7, is characterized in that, the inner surface of described partition glass and outer surface are coated with anti-reflection broadband chemical films respectively.
9. sheet laser amplifier according to claim 1, it is characterized in that, described case also comprises press box, and described press box is fixedly connected with the end face of gain media, described laser amplifier also comprises the second reflector, and described second reflector is between gain media and press box.
10. according to the arbitrary described sheet laser amplifier of claim 1-9, it is characterized in that, described laser amplifier also comprises 2 end mirrors, 2 described end mirrors are fixedly connected with described framework, 2 described end mirrors are relative with the plane of incidence and exit facet respectively, and the surface normal of described end mirror and the angle of incident laser are 0.8-1.2 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520774318.5U CN204947316U (en) | 2015-09-30 | 2015-09-30 | A kind of sheet laser amplifier |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520774318.5U CN204947316U (en) | 2015-09-30 | 2015-09-30 | A kind of sheet laser amplifier |
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| Publication Number | Publication Date |
|---|---|
| CN204947316U true CN204947316U (en) | 2016-01-06 |
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| CN201520774318.5U Expired - Fee Related CN204947316U (en) | 2015-09-30 | 2015-09-30 | A kind of sheet laser amplifier |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105161964A (en) * | 2015-09-30 | 2015-12-16 | 中国工程物理研究院激光聚变研究中心 | Sheet type laser amplifier |
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2015
- 2015-09-30 CN CN201520774318.5U patent/CN204947316U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105161964A (en) * | 2015-09-30 | 2015-12-16 | 中国工程物理研究院激光聚变研究中心 | Sheet type laser amplifier |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160106 Termination date: 20160930 |