CN103236626B - A kind of apparatus and method realizing light cage - Google Patents
A kind of apparatus and method realizing light cage Download PDFInfo
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- CN103236626B CN103236626B CN201310144983.1A CN201310144983A CN103236626B CN 103236626 B CN103236626 B CN 103236626B CN 201310144983 A CN201310144983 A CN 201310144983A CN 103236626 B CN103236626 B CN 103236626B
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Abstract
The present invention announces a kind of apparatus and method realizing light cage, belongs to optics and optical engineering field, builds and provide a kind of apparatus and method producing spacial distribution of output beams shape and occur light cage.The light cage that the method obtains, has the feature of Rotational Symmetry distribution.Device of the present invention is owing to adopting inside and outside two hollow round table shaped gas laserresonators nested in the same way, the chamber parameter of two resonant cavitys is rationally set, the hollow beam hollow parts that two resonant cavitys are exported is overlapping at transmission space, beam spatial distribution occurs that a light field is the solid space of zero, this solid space is wrapped up by the laser light field omnidirectional three-dimensional solid that intensity distributions is non-vanishing, forms light cage.The present invention can realize high power distribution in microsize small-power and large scale.The microsize small-power light cage that the present invention realizes may be used for biomedicine and scientific research, and in large scale, high power light cage may be used for the aspect such as commercial Application and national defence.
Description
Technical field
The present invention relates to optics and optical engineering field, mainly obtained the apparatus and method of the gas laser light beam with light cage distribution of shapes by the gas laser with two inside and outside hollow round table resonant cavitys nested in the same way.
Background technology
In Laser Biomedicine research field, hollow beam by with optical wrench, light tweezer, to realize controlling particulate or to atom cooling.Patent ZL200910216214.1 builds and provides a kind of scheme utilizing laser directly to export the laser beam of special space distribution shape, the positional distance outgoing mirror of the hollow parts of the light beam that the position of this laser beam hollow parts realizes than patent ZL200710048328.0 is farther, therefore more practical.The spatial distribution of the output beam of the laser of patent ZL200910216214.1, along with the increase of transmission range, is evolved into solid light beam from hollow beam, then is evolved into hollow beam.The spatial distribution of the output beam of the laser that patent ZL200910216214.1 builds, distance solid section is far away, hollow dimension is larger, therefore the small size hollow beam that this laser realizes can only realize two dimension imprison to particulate, and the large scale hollow beam that this laser realizes can only realize two-dimensional constrains to sample.
Summary of the invention
The method and apparatus that particulate is imprisoned preferably that this patent is invented for patent ZL200910216214.1, object is build and provide a kind of spacial distribution of output beams shape to occur the gas laser of light cage, the beam spatial distribution that this laser exports occurs that a light field is the solid space of zero, this solid space is wrapped up by the laser light field omnidirectional three-dimensional solid that intensity distributions is non-vanishing, forms light cage.The present invention not only inherits patent ZL200710048328.0 and directly produces hollow beam and gas laser good beam quality, advantage that directivity is stable; Also inherit beam waist spot position that patent ZL200910216214.1 produces to be positioned at outside chamber and output beam increases with transmission range, be evolved into solid light beam from hollow beam, then be evolved into the feature of hollow beam; And overcoming the spatial distribution of the output beam that patent ZL200910216214.1 produces, distance solid section is far away, and hollow dimension is larger, and the hollow beam that thus this laser realizes can not realize the shortcoming of comprehensive imprison to particulate.Device of the present invention, owing to adopting inside and outside two hollow round table resonant cavitys nested in the same way, rationally arranges the chamber parameter of two resonant cavitys, makes the hollow parts of the output beam of inside and outside two hollow round table resonant cavitys overlapping in space, forms light cage.The size of appropriate design light cage and power, can realize particulate omnidirectional three-dimensional Stereo control.This invention can realize high-power output in microsize small-power and large scale.The microsize small-power situation that this invention realizes, may be used for Laser Biomedicine, scientific research; Realize in, high-power smooth cage, may be used for the special processing even national defence of material.
The object of the invention is to be implemented by following measures: the device realizing light cage is gas laser, helium neon laser and carbon dioxide laser is divided into by working-laser material, adopt and be easy to the radio frequency discharge mode realizing glow discharge at special-shaped region of discharge, the feature of laser is that its resonant cavity is by interior, outer two hollow round table resonant cavitys are nested in the same way, the bottom of each hollow round table resonant cavity is Rotational Symmetry concave surface annulus total reflective mirror, the top of each hollow round table resonant cavity is Rotational Symmetry convex surface ring part reflection outgoing mirror, the laser medium region of each hollow round table resonant cavity is the hollow round table sandwiched area that hollow round table shaped materials that two drift angles are equal is nested to form, in, the central axes of outer two hollow round table shape areas of dielectric, be positioned at the convex mirror at concave mirror bottom each resonant cavity and top all about this central axis Rotational Symmetry, each resonant cavity forms two concavo-convex stable cavities along the transmission ray in the vertical section of this central symmetry axes bunch, each concavo-convex stable cavity is called the sub-chamber of respective hollow round table resonant cavity, the chamber axle in this sub-chamber and the central axis in laser medium district intersect, the waist spot position of the sub-chamber output beam of each hollow round table resonant cavity can be arranged between the axis of symmetry in respective outgoing mirror and respective sub-chamber and the intersection point of self laser medium district center axis as required, also can overlap with this intersection point or outside.The laser of such structure has all advantages of patent ZL200910216214.1.Reasonable setting, the region that the output beam in the region and outer hollow round table resonant cavity that make the output beam of interior hollow round table resonant cavity be evolved into hollow parts from solid section is evolved into solid section from hollow parts is surrounded, occur that the light field that laser three-D solid is wrapped up is the region of zero, namely form light cage.The light cage that the present invention realizes may be used for Laser Biomedicine research and such as realizes the imprison of omnidirectional three-dimensional solid to particulate or control under microsize small-power situation, powerful He-Ne Lasers may be used for photodynamics medical treatment and realizes light beam to target site and entirely wrap up, and in large scale, high power carbon dioxide laser can realize laser to extraterrestrial target and entirely wraps up.
The discharge tube of helium neon laser adopts glass or quartz.The discharge tube of carbon dioxide laser can adopt quartz, insulating material or part to adopt insulating material part to adopt as electrode matel material, large-scale carbon dioxide laser adopts rf discharge excitation or preionization energisation mode, working method is continuous print, blower fan is adopted to drive working gas to hold concurrently water cooling method, when radio frequency power supply carries out modulating and carries out pulsed discharge, working method is pulse.
accompanying drawing explanationfig. 1,2,3 is the sign picture of the apparatus structure stereogram of the gas laser realizing light cage, device section and light path schematic diagram, device section and light path schematic diagram respectively, and Fig. 4 is also device section sign picture, and Fig. 5 is light cage section sign picture.
In the accompanying drawings in 1-3, 0 is radio-frequency power supply and the matching network of interior hollow round table resonant cavity, 1 is the Rotational Symmetry concave surface annular total reflective mirror of outer hollow round table resonant cavity, outer total reflective mirror 1 can be called for short, 2 is anodes, 3 is hollow round table shape discharge tubes of outer hollow round table resonant cavity, outer discharge tube 3 can be called for short, 4 is external electrodes, 5 is water collars, 6 is Rotational Symmetry convex surface doughnut portions speculums of outer hollow round table resonant cavity, outer partially reflecting mirror 6 or outer outgoing mirror 6 can be called for short, 7 is blower fans, 8 is radio-frequency power supply and matching networks of outer hollow round table resonant cavity, 9 is cylinders, 10 is interior electrodes, 11 is Rotational Symmetry concave surface annular total reflective mirrors of interior hollow round table resonant cavity, interior total reflective mirror 11 can be called for short, 12 is hollow round table shape discharge tubes of interior hollow round table resonant cavity, interior discharge tube 12 can be called for short, 13 is Rotational Symmetry convex surface doughnut portions speculums of interior hollow round table resonant cavity, interior partially reflecting mirror 13 or interior outgoing mirror 13 can be called for short, 1 and 11 is all relative to the rotational symmetric concave mirror of optical axis 17, concave surface is all in chamber, 6 and 13 is all relative to the rotational symmetric convex mirror of optical axis 17, convex surface is all in chamber, mirror 1 and mirror 6 distance along 15 is the length of outer hollow round table resonant cavity discharge tube 3, mirror 11 and mirror 13 distance along 16 is the length of interior hollow round table resonant cavity discharge tube 12.When for helium neon laser, in accompanying drawing 1,5 and 7 need not be arranged.In Fig. 3,17 is the central axis in inside and outside truncated cone-shaped gas laser medium district, also be the optical axis of this laser light path figure, 15 is the outer center circle conical surface in hollow round table shape gas medium district and the intersection in vertical section, also be axis and the sub-chamber chamber axle of outer hollow round table resonant cavity in this cross-sectional area of light bunch in this vertical section, the optical axis of the upper and lower sub-chamber output beam of exterior resonant cavity meets at O
2, chamber axle 15 is also positioned at O with the intersection point of optical axis 17
2,
θ 2for the drift angle of the outer hollow round table resonant cavity center circle conical surface, 16 is the interior center circle conical surface in hollow round table shape gas medium district and the intersection in vertical section, also be axis and the sub-chamber chamber axle of interior hollow round table resonant cavity in this cross-sectional area of light bunch in this vertical section, the optical axis of the upper and lower sub-chamber output beam in interior resonance chamber meets at O
1, chamber axle 16 is also positioned at O with the intersection point of optical axis 17
1,
θ 1for the drift angle of the interior hollow round table resonant cavity center circle conical surface, in section, chamber, the upper sub-chamber axle 15 of outer hollow round table resonant cavity and chamber, the lower sub-chamber axle of interior hollow round table resonant cavity meet at a C
1, the lower sub-chamber chamber axle of outer hollow round table resonant cavity and chamber, the upper sub-chamber axle 16 of interior hollow round table resonant cavity meet at a C
2.Point O
1and O
2do not overlap, some C
1and C
2heavy and.In Fig. 4
l 1with
l 2the chamber being respectively inside and outside thorax chamber is long,
r 111with
r 112be respectively the inside and outside edge radius of intracavity bottom total reflective mirror 11,
r 211with
r 212be respectively the inside and outside edge radius of total reflective mirror 1 bottom exocoel,
afor the thickness in inside and outside thorax chamber.Fig. 5 is the profile of light cage, and the vertical section of light cage is positioned at O
1o
2c
1c
2surround the intra-zone of formation, this vertical section around central axis 17 rotate a circle namely formed the present invention need realize light cage.The dark long axis O of light cage
1o
2direction and at an O
1with an O
2between, compare O
1o
2between distance little, the dark minor axis axle of light cage is along C
1c
2direction and at a C
1with a C
2between, compare C
1c
2between distance little.When interior, insufflation gas laser medium after vacuum is pumped into by outer discharge tube 12 and 3, respectively by electrode 2 and 10, and the rf discharge excitation gas medium of 2 and 4, in arbitrary section as shown in Figure 3, the axis 16 in my husband chamber, the spontaneous radiation of 15 transmission is excited to be exaggerated, the roundtrip being subject to respective chamber mirror in section sets up vibration, and respectively from mirror 13, mirror 6 exports, perform by 5 and 7 when medium needs cooling, when gas medium does not need cooling, then do not establish 5 and 7, now 5 and 7 and the being vacuum sealed property of unicom pipeline of discharge tube 3 and 12 block, cylinder 9 can make laser have more operation materials and increase the service life.
embodimentbelow in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Rotational Symmetry concave mirror 11,1 bottom inside and outside hollow round table resonant cavity of the present invention, all adopts circular optical glass or quartz wedge to do substrate, to He-Ne laser and CO
2laser is suitable for, to the CO of very high output
2laser, the round copper billet that compactness is fine, hardness is higher is adopted to do substrate, adopt hole cutter sweep the part in the middle of two base materials to be required to cut down respectively according to the inner dimensions of inside and outside annular mirror, but this this part should be glued together so that grind processing with the ring block of self in the middle of two.Because two minute surface sizes are different, so adopt two cover grinding moulds.The grinding tool grinding two minute surfaces all adopts low-carbon steel material by Digit Control Machine Tool according to design processing, because two minute surfaces all do not possess the single center of curvature, therefore two grinding tools do not possess the single center of curvature yet, more difficult in design and processing, but the curved surface of two minute surfaces has strict axisymmetry characteristic, therefore there is not larger difficulty in the processing of two grinding tools.After two finishings are good, strict axisymmetry requirement must be kept to the process of lapping of the mirror that should grind separately.The another side relative with two concave surfaces from being all tapers viewed from the direction of central axis, and the bus of this two taper is vertical with the chamber axle in the concavo-convex chamber of respective in section.One piece that is glued at their centers is taken off after grinding and polishing alone by each minute surface again, can obtain two Rotational Symmetry curved reflectors, can be used on device of the present invention after strictly cleaning and plate total reflection film.Inside and outside convex surface ring part reflection outgoing mirror 13,6 of the present invention, two parts mirror size is different with specification, so also need the grinding mould of two cover correspondences, process of lapping is consistent with the process of lapping of mirror 11,1, difference is that mirror 6,13 is all that convex surface is as partially reflecting mirror reflecting surface plating part reflectance coating, the another side relative with two convex surfaces from being all tapers viewed from the direction of central symmetry axes, and the bus of this two taper is vertical with the chamber axle in the concavo-convex chamber of respective in section.The material of mirror 6,13 substrate, can select glass for helium neon laser, for carbon dioxide laser, can select germanium wafer or zinc selenide etc. according to power requirement.
Inside and outside hollow round table shape discharge tube 12,3 in apparatus of the present invention, obtained after cooling gradually again in the graphite jig then adopt the liquid of glass or quartz fusing to inject to be in uniform temperature to He-Ne concentrator.Two hollow round table shape discharge tubes are formed by inside and outside two-layer truncated cone-shaped glass or quartz ampoule, therefore the graphite jig of each hollow round table shape discharge tube all should be two covers.Graphite intensity is better, therefore can go up lathe comparatively accurately according to design processing, and precision can reach 0.1mm.After mould is longer, then assemble after available several pieces of graphite material segmental machining, mould ectonexine all can adopt certain auxiliary clamp again.If mould after a procedure precision is inadequate, then the mould should repaired or more renew.Hollow round table shape discharge tube of the present invention, to CO
2laser then adopts aluminium, copper or thin stainless steel material to make, and the inside and outside two hollow round table shape metal tubes of each hollow round table shape discharge tube are then directly used as two sparking electrodes.
In device assembling process of the present invention, the support of inside and outside two round table surface of each discharge tube of the present invention and fixedly by adopting specific supports to realize.When for helium neon laser, the inside and outside layer glass of each discharge tube or the bottom of quartzy round table surface and top are all grindings, the reflecting surface in the vertical section of bottom annulus mirror 11 and 1 is concave surface, cross the diameter parallel of the mid point of each concave surface in the bus of respective round platform, the vertical section reflective surface portion of top annulus mirror 13 and 6 is convex surface, crosses the diameter parallel of the mid point of each convex surface in the bus of respective round platform.The back side of mirror 11 and 1 is all ground to the conical surface, and the vertical section at the back side of mirror 11 and 1 is straight line, and when this two mirror and respective hollow round table discharge tube gummed, the vertical section at the back side of mirror 11 and 1 is separately perpendicular to the chamber axle 16 and 15 in respective hollow round table electric discharge pipe chamber.The grinding back surface of mirror 13 and 6 is the conical surface, the vertical section of this two conical surface is straight line, respectively perpendicular to the chamber axle 16 and 15 of respective hollow round table discharge tube, the intersection point of two straight lines in the vertical section of the conical surface at mirror 13 back side overlaps with the intersection point of two straight lines in the vertical section of the conical surface at mirror 6 back side, is all positioned on central axis 17.Process the large and small hollow round table of two glass or quartz, in the roundlet radius ratio of little round platform discharge tube interior round table surface bottom inner edge radius smaller, in the great circle radius ratio of small circle ring discharge tube outer round table surface bottom outer edge radius bigger, inner edge radius bottom the interior round table surface of the outer discharge tube of roundlet radius ratio of large round platform is smaller, outer edge radius bottom the outer round table surface of the outer discharge tube of great circle radius ratio of large circle is bigger, this two round platform is placed in one heart respectively on the adjustable metallic support of two three-dimensionals, under the monitoring of two helium neon lasers, fix the position of two round platforms, again by the annular gap between the inner edge of large round platform and the outer rim of little round platform according to the equally spaced injection of circumferencial direction 8 cementing positions, by cementing for size round platform fixing, again the size round platform be solidified togather is inverted on horizontal stand, and fix with support, again interior physical dimension and respective round type bottom size are matched and the mirror 1 that slightly can loosen and mirror 11 are placed in size two round platform respectively, interior electrode 10 is placed in the internal layer truncated cone-shaped glass of interior discharge tube or the inside of quartz ampoule, in the inner ring again bottom of this internal layer round type being placed in little ring and within the inner edge being positioned at Rotational Symmetry total reflective mirror 11, to be placed in bottom the outer round table surface of interior discharge tube on this little round platform again and be enclosed within the outer rim of mirror 11, because the processing of element ensure that precision, therefore in the suitable monitoring of optical correction's instrument with can requirement be reached after suitably being adjusted each element by supplementary means, and then with vacuum compound by mirror 11, ectonexine round platform pipe and round platform stick together, 13, the mirror at top is carrying out installing and gluing together in advance and under the calibration beam monitoring consistent with axis.Again anode 2 is loaded onto.In the inner ring again bottom of the internal layer round type of outer discharge tube being placed in large round platform and within the inner edge being positioned at the symmetrical total reflective mirror 1 of inner rotary, to be placed in bottom the outer round table surface of outer discharge tube on this large round platform again and be enclosed within the outer rim of mirror 1, equally, because the processing of element ensure that precision, therefore in the suitable monitoring of optical correction's instrument with can requirement be reached after suitably being adjusted each element by supplementary means, and then with vacuum compound by mirror 1, this ectonexine round platform pipe and large round platform stick together, the mirror 6 at top is also carrying out installing and gluing together in advance and under the calibration beam monitoring consistent with axis.Again external electrode 4 is loaded onto.This laser can at this support vertical working, export from top, its advantage is easy to assembly, optical element is stressed very little, also can assembling after traverse or inverted work, but in traverse or the certain process of reply support do before standing upside down, it is made to have the supplemental support of some strength to inside and outside discharge tube ectonexine round type separately, and also strengthen in the gap that inside and outside discharge tube is formed supporting, make its traverse or after standing upside down, the gravity of the ectonexine round platform pipe of two discharge tubes and electrode is almost by support support, now laser output mirror is from laterally or export from below.When for carbon dioxide laser, ectonexine round type due to each discharge tube is metal tube and simultaneously as electrode, therefore the intensity of pipe is very high, its support problem easily solves, preparation before assembling and assembling process are substantially identical with helium neon laser, it should be noted that the Insulation Problems between three electrodes, when Rotational Symmetry curved mirror with glass or quartz substrate, if plating deielectric-coating, does not have problems, if metal-coated membrane, then should there is insulating barrier bottom round type and between the connecting portion of respective completely reflecting mirror, but the voltage of radio-frequency power supply is all lower usually.
After device assembles, discharge tube and coupling part are evacuated.To helium neon laser when vacuum degree reaches 10
-6during × 133.3Pa, in the ratio of Ne:He=1:8, being filled with gaseous mixture pressure is 0.8 × 133.3Pa, the reflectivity of two parts speculum to 0.6328 micron wave length light wave is 98%, satisfactory to both parties reflectance of reflector is more than 99.8%, imposes radio frequency discharge to it, can obtain output.To carbon dioxide laser, when vacuum degree reaches 10
-3during × 133.3Pa, according to CO
2: N
2: He=1:1.5:7.5, stagnation pressure is 10 × 133.3Pa, and two parts speculum is 80% to 10.6 micron wave length light wave reflection rates, and satisfactory to both parties reflectance of reflector is more than 99%, imposes radio frequency discharge can obtain output to it.
embodimentdischarge tube 3 and 12 all adopts
l 1,
l 2be the hollow round table shape glass tube of 100 millimeters long, spacing between two resonant cavitys inside and outside layer round type separately
abe 4 millimeters, the drift angle of inside and outside round platform
θ 1,
θ 2be respectively 0.34 radian, 0.52 radian, outer completely reflecting mirror 1 is Rotational Symmetry concave surface annular mirror, inside and outside edge radius
r 211,
r 212be respectively 41.17 millimeters, 45.04 millimeters, the radius of curvature of section concave surface is 772.99 millimeters, outer outgoing mirror 6 is Rotational Symmetry convex surface annular mirror, and inside and outside edge radius is respectively 15.77 millimeters, 19.71 millimeters, and the radius of curvature of section convex surface is 2014.90 millimeters; Inner total reflection mirror 11 is Rotational Symmetry concave surface annular mirror, inside and outside edge radius
r 111,
r 112be respectively 24.80 millimeters, 28.75 millimeters, the radius of curvature of section concave surface is 713.30 millimeters, interior outgoing mirror 13 is Rotational Symmetry convex surface annular mirror, and inside and outside edge radius is respectively 7.88 millimeters, 11.83 millimeters, and the radius of curvature of section convex surface is 1566.10 millimeters; The intersection point of the extended line of the intersection point of the extended line of two straight lines at the back side, mirror 6 vertical section and two straight lines at the back side, mirror 13 vertical section overlaps; The output beam wavelength of mirror 6 and mirror 13 is 10.6 microns, and the light cage that output beam is formed is around O
1o
2axle Rotational Symmetry, in the profile of Fig. 5 light cage, along O
1o
2between the dark major axis of light cage be 1.11 millimeters, along C in Fig. 5 profile
1c
2between the dark minor axis length of light cage be 0.25 millimeter.
Form the device of light cage, in comprising, inner rotary symmetrical concave surface annulus completely reflecting mirror, in, outer hollow round table shape discharge tube, in, inner rotary symmetrical convex surface ring part speculum, interior electrode, anode, external electrode, cylinder, blower fan, radio-frequency power supply and matching network, water collar, with reference to Fig. 1, inner rotary symmetrical concave surface annular completely reflecting mirror 1 is connected with the bottom of outer hollow round table shape discharge tube 3, outer convex surface ring part speculum 6 is connected with the top of discharge tube 3, interior Rotational Symmetry concave surface annular completely reflecting mirror 11 is connected with the bottom of interior hollow round table shape discharge tube 12, interior convex surface ring part speculum 13 is connected with the top of interior discharge tube 12, be close to inside anode 2 and discharge tube 3 or be directly anode (when for metal material) by inwall, be close to outside external electrode 4 and outer discharge tube 3 or be directly external electrode (when for metal material) by outer wall, be close to inside interior electrode 10 and interior discharge tube 12 or by inwall directly as interior electrode (when for metal material), cylinder 9 and discharge tube 3 are connected with 12 and around discharge tube 3, water collar 5 is around discharge tube, blower fan 7 is connected with discharge tube 3 and 12 by cylinder 9, outer radio-frequency power supply and matching network 8 are connected with anode 2 and external electrode 4, interior radio-frequency power supply and matching network 0 are connected with anode 2 and interior electrode 10, it is characterized in that outer discharge tube 3 and interior discharge tube 12 are two hollow round table shape discharge tubes nested in the same way, the inside and outside wall of two discharge tubes is all round types, truncated cone-shaped interlayer between two two round types forms two region of discharges, the bottom of outer discharge tube 3 and top are respectively by total reflective mirror 1 and the vaccum sealing label of partially reflecting mirror 6, the bottom of interior discharge tube 12 and top are respectively by total reflective mirror 11 and the vaccum sealing label of partially reflecting mirror 13, in making, outer two hollow round table clevis sheaf space energy pumping high vacuums, in high vacuum conditions by He-Ne gaseous mixture or carbon dioxide, nitrogen, helium gas mixture is filled with discharge tube 12 and 3.Be further characterized in that resonant cavity is two nested in the same way hollow round table shape resonant cavitys, it is by being installed on, two Rotational Symmetry concave surface annular completely reflecting mirrors 11 bottom outer two hollow round table shape discharge tubes, 1 respectively with two be installed in, Rotational Symmetry convex surface ring part speculum 13 and 6 composition at outer discharge tube top, completely reflecting mirror 11, the symmetry axis of 1, partially reflecting mirror 13, the symmetry axis of 6 and discharge tube 12, the central axis counterpoise of 3 is combined into 17, in the arbitrary section of device along discharge tube axis 17, completely reflecting mirror 1 and partially reflecting mirror 6 have two centers of curvature to be symmetrically distributed in discharge tube axis both sides all respectively, resonant cavity forms two concavo-convex thorax chambeies to light in section bunch, for two my husband chambeies of device, be designed to stable cavity, the waist spot of this two my husbands chamber output beam is positioned at chamber exterior point O
2, the optical axis of the output beam in this two my husbands chamber also meets at an O
2, and some O
2be positioned on 17, in the arbitrary section of device along discharge tube axis 17, completely reflecting mirror 11 and partially reflecting mirror 13 also have two centers of curvature to be symmetrically distributed in discharge tube axis both sides all respectively, resonant cavity forms two concavo-convex thorax chambeies to light in section bunch, for sub-chamber in two of device, be designed to stable cavity, this in two the waist spot of sub-chamber output beam be positioned at chamber exterior point O
1, the optical axis of the output beam in this two my husbands chamber also meets at an O
1, and some O
1be positioned on 17, some O
1with an O
2do not overlap.The intersection point of the output beam optical axis in the output beam optical axis in the lower sub-chamber of inner chamber and the upper sub-chamber of exocoel is C
1, the intersection point of the output beam optical axis in the output beam optical axis in the upper sub-chamber of inner chamber and the lower sub-chamber of exocoel is C
2, some C
1with a C
2do not overlap.Be further characterized in that the output beam of this device is formed around O
1o
2the rotational symmetric smooth cage of axle, the vertical section of light cage is positioned at O
1o
2c
1c
2surround the intra-zone of formation, the dark long axis O of light cage
1o
2direction and at an O
1with an O
2between, compare O
1o
2between distance little, the dark minor axis axle of light cage is along C
1c
2direction and at a C
1with a C
2between, compare C
1c
2between distance little.Point O
1, O
2, C
1, C
2be called intersection point one, two, three, four.
The present invention, compared with existing patent ZL200910216214.1, has following features:
1, device of the present invention have employed the gas laser that two inside and outside nested hollow round table resonant cavitys are formed;
2, in apparatus of the present invention, the spatial distribution of the laser beam that two resonant cavitys export occurs that by the light intensity of laser omnidirectional three-dimensional solid parcel be the region of zero, and namely output beam occurs that light cage distributes, the relative optical axis Rotational Symmetry distribution of this light cage.
Claims (3)
1. one kind realizes the method for light cage, in it is characterized in that comprising and having, the gas laser that outer two nested in the same way hollow round table gas laser resonant cavitys are formed, described have in, interior Rotational Symmetry convex surface doughnut portions speculum (13) that the interior hollow round table resonant cavity of the gas laser that outer two nested in the same way hollow round table gas laser resonant cavitys are formed is pasted by interior Rotational Symmetry concave surface annular completely reflecting mirror (11) of pasting bottom interior hollow round table shape discharge tube (12) and interior hollow round table shape discharge tube (12) and interior hollow round table shape discharge tube (12) top is formed, the outgoing mirror that this interior Rotational Symmetry convex surface doughnut portions speculum (13) is interior hollow round table resonant cavity, symmetrical concave surface annular completely reflecting mirror (1) of inner rotary that outer hollow round table resonant cavity is pasted by outer hollow round table shape discharge tube (3) and outer hollow round table shape discharge tube (3) bottom and symmetrical convex surface doughnut portions speculum (6) of inner rotary that outer hollow round table shape discharge tube (3) top is pasted are formed, the outgoing mirror that symmetrical convex surface doughnut portions speculum (6) of this inner rotary is outer hollow round table resonant cavity, in, the central axes of outer two hollow round table resonant cavitys, be central axis (17), two resonant cavitys are placed in the same way, arbitrary vertical section of interior hollow round table resonant cavity centrally axis (17) be two relative to the axisymmetric concavo-convex resonant cavity of central axis (17), be called the sub-chamber of interior hollow round table resonant cavity, the optical axis intersection of the output beam in two sub-chambeies of this interior hollow round table resonant cavity is in intersection point one, this intersection point one is positioned on central axis (17), arbitrary vertical section of outer hollow round table resonant cavity centrally axis (17) be two relative to the axisymmetric concavo-convex resonant cavity of central axis (17), be called the sub-chamber of outer hollow round table resonant cavity, the optical axis intersection of the output beam in two sub-chambeies of this outer hollow round table resonant cavity is in intersection point two, this intersection point two is positioned on central axis (17), in, in the same vertical section of outer two hollow round table resonant cavitys centrally axis (17), the optical axis intersection of the output beam in the optical axis of the output beam in the lower sub-chamber of interior hollow round table resonant cavity and the upper sub-chamber of outer hollow round table resonant cavity is in intersection point three, the optical axis intersection of the output beam in the optical axis of the output beam in the upper sub-chamber of interior hollow round table resonant cavity and the lower sub-chamber of outer hollow round table resonant cavity is in intersection point four, intersection point one, two, three, four all do not overlap.
2. a kind of method realizing light cage according to claim 1, it is characterized in that the spatial distribution of the output beam of gas laser described in claim 1 occurs that a light field is the solid space of zero, this solid space is wrapped up by the laser light field omnidirectional three-dimensional solid that intensity distributions is non-vanishing, form light cage, this light cage is relative to central axis (17) Rotational Symmetry, the vertical section of this light cage is positioned at the intersection point one described in claim 1, two, three, four intra-zones surrounding formation, the dark long axis optical axis direction of light cage and between intersection point one and intersection point two, this dark major axis is less than the distance between intersection point one and two, the dark minor axis of light cage along intersection point three and intersection point four line direction and between intersection point three and intersection point four, this dark minor axis is less than the distance between intersection point three and four.
3. a kind of device realizing the method for light cage according to claim 1, in comprising, symmetrical concave surface annular completely reflecting mirror (11) of inner rotary, (1), in, outer hollow round table shape discharge tube (12), (3), in, symmetrical convex surface doughnut portions speculum (13) of inner rotary, (6), interior electrode (10), anode (2), external electrode (4), cylinder (9), blower fan (7), in, outer radio-frequency power supply and matching network (0), (8), water collar (5), symmetrical concave surface annular completely reflecting mirror (1) of inner rotary is connected with the bottom of outer hollow round table shape discharge tube (3), symmetrical convex surface doughnut portions speculum (6) of inner rotary is connected with the top of outer hollow round table shape discharge tube (3), interior Rotational Symmetry concave surface annular completely reflecting mirror (11) is connected with the bottom of interior hollow round table shape discharge tube (12), interior Rotational Symmetry convex surface doughnut portions speculum (13) is connected with the top of interior hollow round table shape discharge tube (12), anode (2) and outer hollow round table shape discharge tube (3) inner side are close to or when outer hollow round table shape discharge tube (3) is for being directly anode by outer hollow round table shape discharge tube (3) inwall during metal material, external electrode (4) and outer hollow round table shape discharge tube (3) outside are close to or when outer hollow round table shape discharge tube (3) is for being directly external electrode by outer hollow round table shape discharge tube (3) outer wall during metal material, interior electrode (10) and interior hollow round table shape discharge tube (12) inner side be close to or when interior hollow round table shape discharge tube (12) for during metal material by interior hollow round table shape discharge tube (12) inwall directly as interior electrode, cylinder (9) and outer hollow round table shape discharge tube (3) are connected with interior hollow round table shape discharge tube (12) and around outer hollow round table shape discharge tube (3), water collar (5) is around outer hollow round table shape discharge tube (3), blower fan (7) is connected with outer hollow round table shape discharge tube (3) and interior hollow round table shape discharge tube (12) by cylinder (9), outer radio-frequency power supply and matching network (8) are connected with anode (2) and external electrode (4), interior radio-frequency power supply and matching network (0) are connected with anode (2) and interior electrode (10), it is characterized in that outer hollow round table shape discharge tube (3) and interior hollow round table shape discharge tube (12) are two hollow round table shape discharge tubes nested in the same way, the inside and outside wall of two discharge tubes is all round types, truncated cone-shaped interlayer between two two round types forms two region of discharges, the bottom of outer hollow round table shape discharge tube (3) and top are respectively by symmetrical concave surface annular completely reflecting mirror (1) of inner rotary and inner rotary symmetrical convex surface doughnut portions speculum (6) vaccum sealing label, the bottom of interior hollow round table shape discharge tube (12) and top are respectively by interior Rotational Symmetry concave surface annular completely reflecting mirror (11) and interior Rotational Symmetry convex surface doughnut portions speculum (13) vaccum sealing label, in making, outer two hollow round table clevis sheaf space energy pumping high vacuums, in high vacuum conditions by He-Ne gaseous mixture or carbon dioxide, nitrogen, helium gas mixture is filled with interior hollow round table shape discharge tube (12) and outer hollow round table shape discharge tube (3).
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