CN102208748B - Multi-pumping disc solid laser - Google Patents
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- CN102208748B CN102208748B CN2011101190438A CN201110119043A CN102208748B CN 102208748 B CN102208748 B CN 102208748B CN 2011101190438 A CN2011101190438 A CN 2011101190438A CN 201110119043 A CN201110119043 A CN 201110119043A CN 102208748 B CN102208748 B CN 102208748B
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Abstract
The invention provides a multi-pumping disc solid laser, comprising a semiconductor laser folded array, a pumping light beam collimation system, a cooling finger, a laser disc crystal, a laser output mirror, a parabolic reflector and a first folding mirror and a second folding mirror, wherein the first and the second folding mirrors can perform180-degree reflection; the laser disc crystal is placed at a focal point of the parabolic reflector; the first and the second folding mirrors are arranged on a reflective light path of the parabolic reflector and respectively arranged at two sides of the laser disc crystal; pumping light beams emitted by the semiconductor laser folded array enter into the parabolic reflector, the first folding mirror, the second folding mirror and the laser disc crystal after collimation of a pumping light collimator; and the pumping light beams are subjected to pumping for many times and then a laser resonant cavity acquires and outputs lasers. The disc solid laser can transmit controllable pumping light for many times; the areas of pumping spots are reasonable; the power-density distribution is even; and only the simple collimation is required to be carried out on incident pumping light beams so as to output the lasers with high power, high efficiency and high beam quality.
Description
Technical field
The invention belongs to laser technique, be specifically related to a kind of disc piece solid laser.
Background technology
Along with improving constantly of laser technology, device level and manufacturing capacity, solid state laser becomes unique in a laser family branch with the advantage of himself uniqueness, and fast-developing towards the direction of high-average power, high light beam quality, high conversion efficiency.The development of present high-grade industrial solid laser is that the solid state laser of new generation of representative becomes the important development direction with fiber laser and disc piece solid laser very rapidly.On the other hand, the Solid State Laser technology interpenetrates with other new and high technologies, makes solid state laser in fields such as the welding of body of a motor car outside plate, Automobile Plate welding and sheet metal cuttings application more and more widely arranged.
Novel disc piece solid laser mainly utilizes the gain media of laminar laser crystal as laser, adopts the mode of end face or profile pump.(Φ/d value is very big owing to the laser crystal very thin thickness; Wherein Φ is the diameter of crystal; The d crystal thickness); Impact at liquid jet under the condition of cooling or efficient TEC paster cooling technology, even adopt the pump light of high power density to carry out pumping, the crystals radial symmetry gradient is very little, temperature rise little and crystal in direction of heat flow parallel with optical axis direction.This equally distributed temperature field has greatly been eliminated the thermal deformation of crystal and to the influence of laser, has been made the laser of output have beam quality preferably.
Because the thickness of disc piece solid laser gain media is very little; Generally between 0.1～1mm; Effectively absorption length is little, and therefore repeatedly the design of the uniformity of pump technology and pump spot is to realize one of core technology of disc piece solid laser high light beam quality, high conversion efficiency operation.2003, United States Patent (USP) Steffen Erhard etc. proposed the structure (seeing U.S. Pat 6577666 B2) that space that single parabolic and polygon prism constitute rotates repeatedly pumping; 2005, Steffen Erhard etc. improved such scheme and have proposed to realize the scheme (seeing U.S. Pat 6891874B2) that the light beam space rotates repeatedly pump technology based on single parabolic and two large-scale prisms.
2008; People such as professor Zhu Xiao propose a kind of based on conjugation dual paraboloid scheme (seeing Chinese patent ZL200810048527.6); Oblique laser crystal, the repeatedly transmission of correcting the multipass pumping configuration realization pump spot of speculum, its pumping number of times is relevant with the angle of laser crystal and correction mirror.2010; Professors Zhu Xiao etc. improve such scheme and (see PCT patent application PCT/CN2010/071865); Proposition collects repeatedly pumping and efficiently is cooled to the novel pumping configuration of one; And with the DVD multidisc concatenation module of this technological development, the pumping efficiency that further improves conjugation dual paraboloid multipass pumping system with utilize the space.
It is circular collimation hot spot that the repeatedly pump technology of proposition video disc lasers such as Steffen Erhard requires launching spot, and hot spot repeatedly rotates transmission in whole parabolic space, thereby and is that axial symmetry distributes and realizes repeatedly pumping with the optical axis.This just needs bigger parabola of processing dimension and refrative mirror to realize the transmission of above-mentioned light; The paraboloidal repeatedly pump scheme of proposition conjugation such as professor Zhu Xiao directly determines the number of times of pump spot to the angular relationship between correction mirror and the video disc, aspect assembling and adjustment, requires relatively stricter.
Summary of the invention
The object of the present invention is to provide a kind of disc piece solid laser of novel repeatedly pumping, this disc piece solid laser only needs carry out comparatively simple collimation to the incident pump beam, just can realize that the laser of high power, high efficiency, high light beam quality is exported.
The invention provides a kind of disc piece solid laser of repeatedly pumping; Comprise that semiconductor laser folds that battle array, pump beam colimated light system, cooling refer to, laser disc crystal and laser output mirror; Laser output mirror and laser disc crystal constitute resonant cavity, and cooling refers to be used for the laser disc crystal is cooled off, and it also comprises parabolic reflector, first refrative mirror and second refrative mirror; Wherein first refrative mirror and second refrative mirror are 180 degree reflections; The laser disc crystal is placed on the along of parabolic reflector, and first, second refrative mirror all is positioned on the reflected light path of parabolic reflector, and lays respectively at the both sides of laser disc crystal;
Get into parabolic reflector, first refrative mirror, second refrative mirror and laser disc crystal behind the pump beam process pump light collimating device collimation that the folded paroxysm of semiconductor laser is penetrated,, obtain laser output by said laserresonator therein through repeatedly pumping.
Further; The equal paralleled by X axis of the projection of the intersection of the intersection of first refrative mirror and second refrative mirror in the XOY coordinate system; And two projections are distributed in one, three quadrants or two, the four-quadrant of XOY coordinate system, and two to project to the distance of X axle unequal, and wherein the XOY coordinate system is that the center of circle with parabolic reflector is an initial point; With the horizontal direction is the X axle, the rectangular coordinate system that vertical direction is set up for the Y axle.
Further, the intersection of the intersection of first refrative mirror and second refrative mirror is not parallel, and two intersections all are parallel to by the determined plane of XOY coordinate system, and the line of the projection mid point of two intersections in this plane is crossed the initial point of XOY coordinate system, and equates to the distance of initial point; Wherein the XOY coordinate system is that the center of circle with parabolic reflector is an initial point, is the X axle with the horizontal direction, and vertical direction is the rectangular coordinate system that the Y axle is set up; Have the inlet of a pump light on first refrative mirror or second refrative mirror, get into parabolic reflector by this inlet behind the pump beam process pump light collimating device collimation that the folded paroxysm of semiconductor laser is penetrated.
The present invention has following beneficial effect:
(1) disc piece solid laser of the present invention adopts the mode of the folded battle array of semiconductor laser pumping, and efficient is high, the life-span is long, and plant maintenance is convenient.
(2) disc piece solid laser of the present invention adopts the repeatedly pumping laser pump cavity that the refrative mirror of parabolic reflector, video disc shape laser crystal and two 180 degree reflections is formed; Realized the repeatedly transmission of controlled pump light; The pump spot area is reasonable, and power density distribution is even.
(3) disc piece solid laser of the present invention has reduced the collimation requirement of noise spectra of semiconductor lasers pump light when realizing repeatedly pumping, has simplified pumping configuration, reduces cost, and has improved the practicality of this system.
(4) the present invention is according to concrete user demand; Different embodiments be can adopt flexibly, V-type or other form laserresonators made up to obtain the output of big mode volume or basic mode, a plurality of video disc shape laser crystals with gain are connected in series to obtain higher power output.
(5) simple, the lighter weight of less, mechanical structure of disc piece solid laser volume of the present invention and adjustment is convenient to commercial Application.
Description of drawings
The disc piece solid laser structure chart of the refrative mirror of the parallel placement of Fig. 1;
The refrative mirror sketch map of Figure 21 80 degree reflections;
The distribution character of hot spot on the paraboloidal mirror in the disc piece solid laser of the parallel placement refrative mirror of Fig. 3;
Fig. 4 rotates the disc piece solid laser structure chart of the refrative mirror of placement;
Fig. 5 rotates in the disc piece solid laser of placing refrative mirror the distribution character of hot spot on the paraboloidal mirror;
Fig. 6 rotates the disc piece solid laser structure chart of placing refrative mirror, dual paraboloid.
Embodiment
The present invention adopts the folded battle array of one or more semiconductor lasers as pumping source, and the refrative mirror of parabolic reflector, video disc shape laser crystal and two 180 degree reflections is formed repeatedly pumping homogenize laser pump cavity.Utilize the refrative mirror of 180 degree reflections and the optical characteristics of parabolic reflective focusing, realize controlled repeatedly pumping.
In first kind of embodiment (abbreviating scheme 1 as); The refrative mirror of two 180 degree reflections is positioned on the reflected light path of parabolic reflector; The intersection of the refrative mirror of two 180 degree reflections is parallel to each other; And be distributed in one, three quadrants or two, the four-quadrant of the determined XOY coordinate system of parabolic reflector, the projection of two intersections in the XOY coordinate system is parallel with the X axle and have certain difference (| L1-L2| ≠ 0) to the distance of X axle.Pump-coupling was inner to the video disc laser crystal after pump light got into parabolic reflector polished object face mirror reflects from first refrative mirror top; Unabsorbed light leaves second refrative mirror of parabolic reflector entering with directional light after getting back to parabolic reflector once more; Refrative mirror is symmetry axis translation pump light with the light of incident with the intersection of refrative mirror; 180 degree reflex to parabolic reflector then; After parabolic mirror reflects, incide the laser disc crystals once more; After this unabsorbed light is after parabolic mirror reflects, and parallel first refrative mirror that incides is because there is certain difference (| L1-L2| ≠ 0) in two refrative mirror intersections to the distance of coordinate system X.Therefore light gets into first refrative mirror and accomplishes translation and 180 degree reflections once more, turns back to parabola.After this above-mentioned pumping process constantly repeats; The final repeatedly pumping of accomplishing the homogenize hot spot; Pump light forms a series of pump spots that are parallel to each other on parabolic reflector, on video disc, form uniform pump spot, effectively improves the light light conversion efficiency of laser.
In second kind of embodiment (abbreviating scheme 2 as); The refrative mirror of two 180 degree reflections is positioned on the reflected light path of parabolic reflector; There is certain included angle α in two 180 intersections of spending the refrative mirror of reflection, and the line of the projection mid point of intersection in the determined XOY plane of parabola of the refrative mirror of two 180 degree reflections is crossed initial point and equal to the distance of initial point.Pump light incides parabolic reflector from the input aperture on first refrative mirror; Pump-coupling is inner to the video disc laser crystal after the light polished object face mirror reflects; Unabsorbed light leaves second refrative mirror of parabolic reflector entering with directional light after getting back to parabolic reflector once more; Because there is certain rotation in second refrative mirror with respect to first refrative mirror; Therefore with respect to paraboloidal coordinates system rotation has taken place when second refrative mirror is symmetry axis translation pump light with light with the intersection of refrative mirror, light is after reflection got back to parabolic reflector, incides the laser disc crystals once more; After this unabsorbed light is after parabolic mirror reflects; Parallel first refrative mirror that incides, because there is certain angle in the intersection of two refrative mirrors, the light that therefore incides first refrative mirror is avoided the input aperture on the refrative mirror.After this light polished object face mirror picture and 180 is spent the reflected back parabolic reflectors, and light so back and forth repeats said process, finally accomplishes repeatedly pumping.Pump light forms the hot spot of circular distribution in the zone of two refrative mirrors on the parabolic reflector in the projection of XY coordinate system, and hot spot existence rotation itself, thereby realizes the homogenize of pump spot on the video disc and repeatedly transmission, effectively improves the light light conversion efficiency of laser.
Below in conjunction with accompanying drawing and instance the present invention is done further detailed explanation.
As shown in Figure 1, the disc piece solid laser that scheme 1 provides comprises that parabolic reflector 1, first refrative mirror 2, second refrative mirror 3, cooling refer to 4, the folded battle array of laser beam 6, semiconductor laser behind the laser disc crystal 5, collimation 12, pump beam colimated light system 13 and laser output mirror 14.The pump beam of folded battle array 12 emissions of semiconductor laser gets into after through pump light collimater 13 collimations in the repeatedly pumping system that parabolic reflector 1, first refrative mirror 2, second refrative mirror 3 and laser disc crystal 5 constituted; Realize repeatedly, efficiently, pumping uniformly, laser disc crystal 5 and laser output mirror 14 constitute resonant cavitys and obtain laser and export.
Parabolic reflector 1 has the characteristic of reflect focalization, and the collimated light beam of incident is converged to its along, and parabola is coated with the rete to the high reflection of pump light.
First refrative mirror 2 and second refrative mirror 3 are the refrative mirror of 180 degree reflections, and refrative mirror is made up of two parts, and 180 degree retroreflectings of light are accomplished in this two parts combination, and the intersection of these two parts in the bottom surface is called the intersection of this refrative mirror.This refrative mirror can be two right-angle prisms, two Borrow's prisms, the also level crossings placed of two 90 degree angles.If prism, then the hypotenuse face of prism is coated with the anti-reflection film of pump light, and two right angle mirror polish utilize the total internal reflection of light to realize 180 degree retroreflectings of light beam.If the level crossing that adopts two 90 degree angles to place, then catoptrical plane need be coated with the high-reflecting film to pump light.Fig. 2 has provided the sketch map of the refrative mirror that the level crossing placed by two 90 degree angles forms, and its cathetus AB is the intersection of this refrative mirror, in the assembling of pumping system repeatedly, is important rigging datum line.
Cooling refers to that 4 are the cooling-part and the support section of laser disc crystal 5; Video disc laser crystal 5 welds, pastes or is clamped in cooling and refers on 4; The laser disc crystal 5 is cooled off efficiently; Can adopt the liquid cools mode of jet impulse cooling, also can adopt the type of cooling of paster or microchannel.
Laser disc crystal 5 thickness is 0.1mm～1mm, and diameter is 4mm～25mm, as the active medium of laser.This crystal is placed on the along of parabolic reflector 1; One side away from parabolic reflector is coated with the rete of pump light with the high reflection of output laser; This rete and laser output mirror 14 constitute laserresonator; Another side is coated with the high transmittance film layer of pump light with output laser, to reduce the reflection loss of pump light and output laser.The laser disc crystal 5 is suitable out of focus when mounted.
The light beam that pump beam collimater 13 is sent the folded battle array 12 of semiconductor laser collimates, and the pump beam X behind collimation, Y directional divergence angle are less and equal.Make the spot size that gets into after parabola focuses on reach designing requirement, thereby obtain the hot spot of a strip.
The course of work of first kind of disc piece solid laser of the present invention is following: the pump light 6 through collimation incides on the parabolic reflector 1 from first refrative mirror, 2 tops; Polished object face speculum 1 reflexes to its along; The along that the laser disc crystal is placed on this parabolic reflector is out of focus suitably, so pump light incides laser disc crystals branch and be absorbed, and unabsorbed pump light is returned parabolic reflector 1 by crystal reflection; Leave parabolic reflector with light beam 7 after the polished object face mirror reflects and get into second refrative mirror 3; Because second refrative mirror 3 has the characteristic of 180 degree retroreflectings, so light beam 7 is symmetry axis with getting back to parabolic reflector 1 with light beam 8 after the light beam 7 reflection translations with the second refrative mirror intersection AB, and focuses on the laser disc crystals once more; Unabsorbed pump light is once more by laser crystal reflected back parabolic reflector; Because the translation feature of second refrative mirror, make this beam reflected at the four-quadrant of parabolic reflector, leave parabolic reflector 1 with light beam 9 and get into first refrative mirror 2; And the retroreflecting that the translation and 180 of completion light beam is spent in first refrative mirror 2; Reenter with light beam 10 and to be mapped to parabolic reflector 1, after this get into the laser disc crystal once more, unabsorbed light beam is second quadrant of reflected back parabolic reflector 1 once more; After the light beam polished object face mirror reflects, get into second refrative mirror 3 with light beam 11.Thereby light beam repeatedly forms circulation in the pumping system at this, realizes the repeatedly pumping of laser disc crystal.
The transmission characteristic of this scheme layout and light is described below: the center of circle with parabolic reflector 1 is an initial point, is the X axle with the horizontal direction, and vertical direction is the Y axle, sets up rectangular coordinate system XOY.The refrative mirror 2,3 of two 180 degree reflections is positioned on the reflected light path of parabolic reflector 1; The intersection AB of first refrative mirror 2 is parallel with the X axle with 3 projections of intersection CD in the XOY coordinate system of second refrative mirror; And be distributed in one, three quadrants or two, the four-quadrant of XOY coordinate system; Two refrative mirrors are as shown in Figure 3 at the XOY plane inner projection, wherein A ' B ', C ' D ' be respectively first refrative mirror 2 the intersection of intersection and second refrative mirror 3 in the projection of this coordinate plane.All parallel with the X axle and the length distance X axle of A ' B ', C ' D ' is respectively, L1, L2, and both differences | L1-L2| ≠ 0.So just can guarantee pump beam from the first refrative mirror incident through parabolic reflector, the light beam that the laser crystal and second refrative mirror reflect gets into first refrative mirror to carry out getting back to once more repeatedly in the reflecting system after the reflected in parallel, realizes repeatedly translation reflection.Wherein a is the launching spot behind the incident collimation; After parabolic mirror reflects and video disc crystal reflection, incide parabolic reflector and form hot spot b; After this refrative mirror with light beam with the symmetrical reflected back parabolic reflector of A ' B '; On parabola, form hot spot c, light beam is got back to the parabolic hot spot d that forms once more after the laser crystal reflection.After this light beam gets into first refrative mirror; Form hot spot e to incide parabolic going up after the reflection of intersection C ' D ' symmetry again; And focus on the video disc crystal after inciding parabolic reflector once more; And unabsorbed light beam returns parabolic reflector, forms hot spot f, and said process constantly is concatenated to form repeatedly pumping.Therefore, a among Fig. 3, e, d is the hot spot distribution character of hot spot on parabolic reflector 1 of first refrative mirror 2 of coming in and going out; B, c, f is the hot spot of second refrative mirror 3 of coming in and going out 1 hot spot distribution character on parabolic reflector; Thus it is clear that, because two refrative mirror intersections are parallel to each other, so in the same parallel distribution of hot spot of parabolic reflector formation; The number of times of its pump spot receives the influence of parameter N=L/|L1-L2|, and wherein L is as shown in Figure 2, is the distance of refrative mirror two hypotenuses.When N=2n (n is a positive integer), each refrative mirror inner light beam transmission 2n+1 time is forming the individual parallel hot spot branch of 2n+1 to deserved parabolic zone, and the pumping number of times of video disc crystal is 2 * (2n+1) inferior.When N=2n+1, the pumping number of times that has 2n+2 hot spot video disc crystal in the refrative mirror is 2 * (2n+2) inferior.When 2n＜N＜2n+1, the pumping number of times of video disc crystal equally between 2 * (2n+1) inferior and 2 * (2n+2) inferior between.
As shown in Figure 4; The disc piece solid laser that scheme 2 provides comprises that parabolic reflector 1, first refrative mirror 2, second refrative mirror 3, cooling refer to 4, laser beam 6, pump light inlet 15 behind the laser disc crystal 5, collimation; Laser output mirror 14; The folded battle array 12 of semiconductor laser, pump beam colimated light system 13.Get into parabolic reflector 1 behind pump beam process pump light collimater 13 collimations of folded battle array 12 emissions of semiconductor laser; First refrative mirror 2; Second refrative mirror 3, in the repeatedly pumping system that the laser disc crystal 5 is constituted, realize repeatedly, efficiently, pumping uniformly; Laser crystal 5 constitutes resonant cavity with laser output mirror 14 and obtains laser output.
The rete of above-mentioned each device and function and scheme 1 are basic identical, but aspect space layout and position relation, exist than big-difference, make that distribution was different when pump beam transmitted in the space.For realizing this transmission plan, be initial point with the center of circle of parabolic reflector 1, with the horizontal direction X axle, vertical direction is the Y axle, sets up rectangular coordinate system XOY.The refrative mirror 2,3 of two 180 degree reflections is positioned on the reflected light path of parabolic reflector 1, and the intersection of the intersection of first refrative mirror 2 and second refrative mirror 3 is parallel to XOY plane.And there is certain included angle α (α＞0) in the intersection of two refrative mirrors, and the line of the projection mid point of two intersections in parabolic reflector 1 determined XOY plane is crossed initial point and equal to the distance of initial point.Have the inlet 15 of a pump light on first refrative mirror 2 or second refrative mirror 3, pump light gets into repeatedly in the pumping system thus behind collimation.Second kind of disc piece solid laser course of work of the present invention is following:
Pump light 6 through collimation gets into parabolic reflector 1 from the pump light inlet 15 on first refrative mirror 2; By this direct reflection to its along; The laser disc crystal is placed on the along of this parabolic reflector; Therefore inciding laser disc crystals branch is absorbed; Unabsorbed pump light is returned parabolic reflector 1 by crystal reflection, and polished object face mirror reflects is left parabolic reflector with pump light and got into second refrative mirror 3, because the intersection AB of second refrative mirror 3 exists with anglec of rotation α with respect to the intersection CD of first refrative mirror 2 and has the characteristic of 180 degree retroreflectings; Therefore the pump beam of incident is that symmetry axis reflects translation back reflection to parabolic reflector 1 with this light with the second refrative mirror intersection AB; And focusing on the laser disc crystals once more, unabsorbed pump light is transferred to other positions of refrative mirror (leaving pump light inlet 15) by first refrative mirror, 2 translation reflected backs parabola once more by laser crystal reflected back parabolic reflector because the light of first refrative mirror 2 is got back in the existence of anglec of rotation α; Once more the laser disc crystal 5 is carried out pumping, after this said process constantly repeats to have realized the repeatedly reflection of pump light.
The transmission characteristic of this scheme layout and light is described below: with the parabolic reflector initial point is the center of circle, is the X axle with the horizontal direction, and vertical direction is the Y axle, sets up rectangular coordinate system XOY.The parallel XOY plane of the intersection of two refrative mirrors is placed, and is as shown in Figure 5 at the XOY plane inner projection, wherein A ' B '; C ' D ' is that the intersection of intersection and second refrative mirror 3 of first refrative mirror 2 is in the projection of this coordinate plane; Its intersection mid point O2, the line of O3 is crossed initial point, and identical to the distance of initial point.The center of laser disc crystal is the initial point O of coordinate system, and according to optical imaging concept, the intersection A ' B ' of second refrative mirror is A with the laser disc crystal 5 at the first refrative mirror intersection C ' D ' planar imaging through parabola 1 " B ".A " B " with the first refrative mirror C ' D ' and the number of times and the pump spot that exist angle, this angle to determine repeatedly pump spot in the spatial distributions characteristic.Pump spot is from pump light inlet a incident;, parabolic reflector 1 and laser disc crystal 5 be incident to second refrative mirror after reflecting with b; Because 180 degree retroreflecting characteristics of second refrative mirror; Light beam b is symmetrically picture with light beam c reflected back parabolic reflector with intersection A ' B ', and the symmetrical region of after the laser disc crystal reflection, getting back to parabolic reflector once more forms light beam d, reflected back first refrative mirror; And in first refrative mirror, be light beam e reflected back parabolic reflector with intersection C ' D ' mirror image; Said process constantly repeats, and finally forming with intersection mid point O2 in the corresponding parabolic zone of first refrative mirror is a series of hot spots that center, the center of circle is symmetrically distributed, and its hot spot is phase alignment O2 rotation when repeatedly transmitting.In like manner; Having formed with intersection mid point O3 in the corresponding parabolic zone of second refrative mirror is a series of hot spots that center, the center of circle is symmetrically distributed; Its hot spot is phase alignment O3 rotation when repeatedly transmitting, and the pumping zone was more even after the hot spot that makes pumping arrive the laser disc crystals like this superposeed.The number of times of pump spot and distribution character are by the determining positions of two refrative mirror intersection angle and incident beam; The frequency n of transmission ray=m π/α in the refrative mirror is (if α can not be divided exactly by π; Earlier it is fractionized; The numerical value of m is the least common multiple of molecule in the mark, and is integer, makes it satisfy the relation that divides exactly).Then pump beam has transmitted 2n time between refrative mirror, with respect to the video disc laser crystal with regard to pumping 4n time.And pump spot in paraboloidal position distribution preferably with the position incident of the angular bisector of the angle of cut, like this all hot spots the center of circle be that initial point evenly distributes.
As shown in Figure 6; Can find on the basis of scheme 2 that the distribution of pump light on the parabolic minute surface all drops on refrative mirror in the projected area of parabolic reflector and be circular distribution; Therefore, for practicing thrift paraboloidal rapidoprint and processing cost, only need process two part parabolic reflectors so that effective reflect focalization to be provided with the symmetrical distribution of identical faces type function space; The corresponding corresponding position that is assembled to gets final product when assembling, and its transmission means is identical with scheme 2 with operation principle.
The present invention not only is confined to above-mentioned embodiment; Persons skilled in the art are according to content disclosed by the invention; Can adopt other multiple embodiment embodiment of the present invention, therefore, every employing project organization of the present invention and thinking; Do some simple designs that change or change, all fall into the scope of the present invention's protection.
Claims (1)
1. disc piece solid laser of pumping repeatedly; Comprise that the folded battle array of semiconductor laser (12), pump beam colimated light system (13), cooling refer to (4), laser disc crystal (5) and laser output mirror (14); Laser output mirror (14) constitutes resonant cavity with laser disc crystal (5); Cooling refers to that (4) are used for laser disc crystal (5) is cooled off, and it is characterized in that it also comprises parabolic reflector (1), first refrative mirror (2) and second refrative mirror (3); Wherein first refrative mirror (2) and second refrative mirror (3) are 180 degree reflections; Laser disc crystal (5) is placed on the along of parabolic reflector (1), and first, second refrative mirror (2,3) all is positioned on the reflected light path of parabolic reflector (1), and lays respectively at the both sides of laser disc crystal (5);
Get into parabolic reflector (1), first refrative mirror (2), second refrative mirror (3) and laser disc crystal (5) behind pump beam process pump light colimated light system (13) collimation of the folded battle array of semiconductor laser (12) emission; Through repeatedly pumping, obtain laser output therein by said resonant cavity;
The repeatedly pumping laser pump cavity that first, second refrative mirror (2,3) of said parabolic reflector (1), said laser disc crystal (5) and two 180 degree reflections is formed has been realized the repeatedly transmission of controlled pump light;
The equal paralleled by X axis of the projection of intersection in the XOY coordinate system of the intersection of first refrative mirror (2) and second refrative mirror (3); And two projections are distributed in one, three quadrants or two, the four-quadrant of XOY coordinate system; Two to project to the distance of X axle unequal; Wherein the XOY coordinate system is that the center of circle with parabolic reflector (1) is an initial point, is the X axle with the horizontal direction, and vertical direction is the rectangular coordinate system that the Y axle is set up;
Perhaps,
The intersection of the intersection of first refrative mirror (2) and second refrative mirror (3) is not parallel, and two intersections all are parallel to by the determined plane of XOY coordinate system, and the line of the projection mid point of two intersections in this plane is crossed the initial point of XOY coordinate system, and equates to the distance of initial point; Wherein the XOY coordinate system is that the center of circle with parabolic reflector (1) is an initial point, is the X axle with the horizontal direction, and vertical direction is the rectangular coordinate system that the Y axle is set up; Have the inlet (15) of a pump light on first refrative mirror (2) or second refrative mirror (3), get into parabolic reflector (1) by this inlet behind pump beam process pump light colimated light system (13) collimation of the folded battle array of semiconductor laser (12) emission.
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| CN109494551B (en) * | 2017-09-13 | 2024-03-01 | 中国科学院大连化学物理研究所 | Disc laser |
| CN107834353A (en) * | 2017-12-18 | 2018-03-23 | 华中科技大学 | A kind of recombination laser amplifier based on disk and battened construction |
| CN108899753B (en) * | 2018-08-21 | 2024-04-02 | 深圳市格镭激光科技有限公司 | End-face uniform pumping solid laser |
| CN112018589B (en) * | 2019-05-28 | 2021-07-13 | 天津凯普林激光科技有限公司 | Laser amplification device and laser amplification method |
| CN110380327B (en) * | 2019-07-30 | 2024-05-28 | 中国人民解放军国防科技大学 | Self-homogenizing high-energy laser for near-field intensity distribution of light beam |
| CN111934174B (en) * | 2020-07-30 | 2021-10-08 | 华中科技大学 | Multi-pumping disc laser |
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| CN101414728A (en) * | 2008-07-25 | 2009-04-22 | 华中科技大学 | Disc piece solid laser |
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| DE19835107A1 (en) * | 1998-08-04 | 2000-02-17 | Univ Stuttgart Strahlwerkzeuge | Laser amplifier system |
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| CN101414728A (en) * | 2008-07-25 | 2009-04-22 | 华中科技大学 | Disc piece solid laser |
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