CN102684052B - Laser unstable resonator capable of outputting solid light beam and application of laser unstable resonator - Google Patents
Laser unstable resonator capable of outputting solid light beam and application of laser unstable resonator Download PDFInfo
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- CN102684052B CN102684052B CN 201210137347 CN201210137347A CN102684052B CN 102684052 B CN102684052 B CN 102684052B CN 201210137347 CN201210137347 CN 201210137347 CN 201210137347 A CN201210137347 A CN 201210137347A CN 102684052 B CN102684052 B CN 102684052B
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Abstract
The invention discloses a laser unstable resonator capable of outputting a solid light beam. The laser unstable resonator comprises a laser body, an internal cone annular reflecting mirror and an external cone annular reflecting mirror, wherein the laser body comprises a convex mirror and a concave mirror, which are opposite to each other; the internal cone annular reflecting mirror is arranged between the convex mirror and the concave mirror; a reflecting mirror surface of the internal cone annular reflecting mirror is a concave conical surface; a mirror body of the internal cone annular reflecting mirror is a hollow annular body; the external cone annular reflecting mirror is arranged below an optical axis of the unstable resonator and opposite to the internal cone annular reflecting mirror; the reflecting mirror surface of the external cone annular reflecting mirror is a convex conical surface; and a connecting line of the center Q of the reflecting mirror surface of the external cone annular reflecting mirror and the center P of the reflecting mirror surface of the internal cone annular reflecting mirror is perpendicular to the optical axis of the unstable resonator. The invention also discloses application of the laser unstable resonator. By a device and a method provided by the invention, conversion of an annular light beam which is output by an unstable resonator laser can be realized by using reflecting optical elements, and a circular solid light beam can be output. The device provided by the invention is simple in structure and stable in operation.
Description
Technical field
The invention belongs to the superpower laser technical field, particularly a kind of laser unstable resonator and application thereof of exporting solid light beam based on chamber outer light beam shaping technique.
Background technology
Superpower laser with high light beam quality has very important application prospect in industry and Military Application field.For superpower laser, the most important thing is how to obtain big as far as possible mode volume and good transverse mode distinguishing ability, realizing the running of high power single mode, thus can be from active medium high efficiency extraction energy, the laser output that can keep high light beam quality again.In order to obtain high-power laser output, often need to adopt the active medium of large volume and big lateral dimension, to guarantee that optical element is realized high-power laser output in the chamber under the prerequisite of not Stimulated Light damage.
Stable cavity can only obtain to operate at basic mode (TEM at the optical axis center near zone
00The Gaussian beam of nearly diffraction limit mould), its mode volume is limited, and is not suitable for superpower laser.
To having the laser of large volume and big lateral dimension active medium, generally adopt the unsteady cavity technology to obtain single transverse mode output.But the coupling of conventional unstable cavity laser is output as the ring-shaped light spot structure, and after this annular hollow beam is focused on, the power density of its focal spot center will be more much lower than the solid light beam with equal-wattage and spot size; Similarly, the far-field divergence angle of this annular hollow beam also will finally limit its application far above diffraction limit.
In order to eliminate the central blackening of conventional unstable cavity laser output annular beam, people have proposed many diverse ways, in the hope of realize extracting the high energy laser beam near diffraction limit from the large volume active medium.The most representative variable reflectivity mirror (common comprise Gaussian, super Gaussian, the parabolic type etc.) unsteady cavity and 90 that surely belongs to
0Bundle rotary annular unsteady cavity (Unstable Resonator with 90
0Beam Rotation).
Adopt variable reflectivity mirror as the unsteady cavity of output coupling mirror, can reach the high energy laser beam output of nearly diffraction limit in theory.But for superpower laser, the reflectivity-variable dielectric film of making high damage threshold is very difficult; And different dielectric film thickness also can cause the phase distortion of output beam, so the reflectivity-variable output coupling mirror has certain limitation in practical application.
People such as USAF Weapons Laboratory A.H.Paxton are at " Applied Optics " 1986 the 25th volumes the 17th phase " Unstable resonators with 90
0Beam rotation " proposed a kind of 90 in the literary composition
0Bundle rotary annular unsteady cavity, this chamber be owing to utilized the light beam rotation technique can be to the inhomogeneities of active medium and the averaging of aberration of minute surface, thereby obtain the full spot laser beam output of rectangle of high light beam quality.But because the output coupling mirror in this chamber is the edge of a knife, output beam is Filled Rectangle, in strong infrared laser transmission, can only adopt the emission of inclined shaft shape reflecting telescope; And the design difficulty of inclined shaft reflecting telescope is big, involves great expense.
Summary of the invention
One of purpose of the present invention provide a kind of export solid light beam laser unstable resonator, based on optical element light beam is reconstructed shaping, make the core reconstruct of common unsteady cavity output annular beam become the solid light bundle.
The technical scheme that this purpose of realization the present invention adopts is as follows:
A kind of laser unstable resonator of exportable solid light beam comprises:
Laser bodies, it comprises by what convex mirror and concave mirror positioned opposite constituted and just props up pseudo confocal unsteady resonator, and the line of centres of this convex mirror and concave mirror forms the optical axis of unsteady cavity;
The internal conical surface Perimeter Truss Reflector, it is arranged in the laser bodies, and between described convex mirror and concave mirror, the mirror surface of this internal conical surface Perimeter Truss Reflector is the taper seat shape that caves inward, and the mirror body of this speculum is the annular solid of hollow; With
The outer conical surface speculum, it is arranged on the optical axis below of unsteady cavity, and it is staggered relatively with described internal conical surface Perimeter Truss Reflector, wherein the mirror surface of this outer conical surface speculum is the taper seat shape to outer lug, and its mirror surface central point is vertical with the optical axis of described unsteady cavity with the line of Perimeter Truss Reflector minute surface central point;
It is characterized in that, be transferred on the convex mirror pass the hollow mirror body of speculum through a described concave mirror beam reflected part after, to continue vibration, another part incides on the mirror surface of internal conical surface Perimeter Truss Reflector, and reflex on the mirror surface of described outer conical surface speculum, by regulating described internal conical surface Perimeter Truss Reflector and outer conical surface speculum along the relative distance on the two central point line directions to suitable size, can realize the solid light beam of mirror surface output from described outer conical surface speculum.
As improvement of the present invention, the mirror surface of described internal conical surface Perimeter Truss Reflector has identical shaft section drift angle with the mirror surface of outer conical surface speculum, and is the obtuse angle.
As improvement of the present invention, the rotation axes of symmetry of described internal conical surface Perimeter Truss Reflector and described outer conical surface speculum all with the optical axis of described unsteady cavity angle at 45.
As improvement of the present invention, the bottom of described internal conical surface Perimeter Truss Reflector has the first annular cooling water groove, the annular water tank cover plate that has water inlet and delivery port covers on this first annular cooling water groove, and is tightly connected with the bottom of described internal conical surface Perimeter Truss Reflector.
As improvement of the present invention, the rear portion of described outer conical surface speculum has the second annular cooling water groove, and the circular channels cover plate that has water inlet and delivery port covers on this second annular cooling water groove, and is tightly connected with the bottom of described outer conical surface speculum.
Another technical scheme that this purpose of realization the present invention adopts is as follows:
A kind of laser unstable resonator of exportable solid light beam comprises:
Laser bodies, it comprises by what convex mirror and concave mirror positioned opposite constituted and just props up pseudo confocal unsteady resonator, and the line of centres of this convex mirror and concave mirror forms the optical axis of unsteady cavity;
The outer conical surface lens, it is arranged on outside the laser bodies, and is positioned at described convex mirror rear, this outer conical surface lens mirror body is column, mirror body one end end face is the plane, and other end end face is the taper seat of outside protrusion, and the optical axis of its rotation axes of symmetry and unsteady cavity is on same straight line; With
The internal conical surface lens, its coaxial outer conical surface lens rear that is arranged on, these internal conical surface lens are column, end face towards the outer conical surface lens is the taper seat shape that caves inward, the other end is the plane, the rotation axes of symmetry of these internal conical surface lens and the optical axis of unsteady cavity are on same straight line, and the light beam after described outer conical surface lens refraction is injected on the taper seat that caves inward of these internal conical surface lens, and the planar end by the other end after the transmission penetrates;
It is characterized in that, light beam is by the outside reflex time of concave mirror, a part reflexes to and continue concussion on the convex mirror in resonant cavity, another part is parallel to be mapped on the planar ends of outer conical surface lens of convex mirror back, reflect to optical axis direction after taper seat end through being transmitted through the other end and the refraction, the light beam of refraction is injected on the taper seat that caves inward of internal conical surface lens, by regulate the internal conical surface lens on the optical axis direction of unsteady cavity with the distance of outer conical surface lens to suitable size, can make that when these internal conical surface lens were transmitted through the planar end of the other end, the light beam of outgoing was solid light beam.
As improvement of the present invention, described outer conical surface lens have identical critical angle c with the taper seat of described internal conical surface lens.
As improvement of the present invention, the taper seat of described outer conical surface lensed endface and the taper seat of these internal conical surface lens have identical shaft section vertex angle theta ', and 180 °-2c＜θ '＜180 °.
Two of purpose of the present invention is to propose a kind of method of utilizing laser unstable resonator to export solid light beam, and it specifically comprises:
Between convex mirror in the laser body device of laser unstable resonator and the concave mirror internal conical surface Perimeter Truss Reflector is set, and make through a described concave mirror beam reflected part and incide step on the mirror surface of internal conical surface Perimeter Truss Reflector, wherein the mirror surface of this internal conical surface Perimeter Truss Reflector is the taper seat shape that caves inward, and the mirror body of this speculum is the annular solid of hollow;
The outer conical surface speculum is set below the optical axis of described laser unstable resonator, and make reverberation on the mirror surface of internal conical surface Perimeter Truss Reflector shine on the mirror surface of described outer conical surface speculum and the step of reflection back output, wherein this outer conical surface mirror reflects minute surface central point is vertical with the optical axis of described unsteady cavity with the line of internal conical surface Perimeter Truss Reflector minute surface central point; And
Regulate described internal conical surface Perimeter Truss Reflector and the outer conical surface speculum step along the relative distance on the two central point line directions to suitable size, can make that the light beam of exporting from the mirror surface of described outer conical surface speculum is solid light beam.
Two of purpose of the present invention also is to propose another kind and utilizes laser unstable resonator to export the method for solid light beam, and it specifically comprises:
Convex mirror rear in the laser body device of described laser unstable resonator arranges the outer conical surface lens, and make concave mirror incide on these lens and the step of outgoing after the refraction to a part of light beam of external reflectance is parallel, wherein, this lens mirror body is column, mirror body one end end face is the plane, other end end face is the taper seat of outside protrusion, and the optical axis of its rotation axes of symmetry and unsteady cavity is on same straight line;
At the coaxial internal conical surface lens that arrange in described outer conical surface lens rear, and the light beam that makes outgoing after this outer conical surface lens refraction incides on these internal conical surface lens and the step of refraction back outgoing, wherein, these internal conical surface lens are column, the end face of facing the taper seat of outer conical surface lens is the taper seat shape that caves inward, and the other end is the plane; And
Regulate the internal conical surface lens on the optical axis direction of unsteady cavity with the distance of the outer conical surface lens step to suitable size, can make that the light beam through described internal conical surface lens refraction back ejaculation is solid light beam.
The present invention is the annular hollow beam of unsteady cavity output, and the effect of interior (or outer) the taper seat mirror by having certain angle is concentrated light beam gradually to the optical axis position of laser beam; Utilize then with described in outward (or interior) taper seat mirror of (or outer) taper seat mirror with same axis cross section drift angle near the light beam that concentrates on the laser beam optical axis is led again, to obtain the light beam output along the optical axis direction transmission, and carry out fine adjustment by internal (or outer) taper seat mirror and outer (or interior) taper seat mirror along the relative position of optical axis direction, realize the circular solids shaping light beam output along the optical axis direction transmission.
The present invention utilizes two cylindrical taper seat mirrors, and beam path is carried out twice adjustment respectively.Wherein, it is taper seat that each cylindrical taper seat mirror all has an end face, and two taper seats have identical shaft section drift angle.Two cylindrical taper seat mirrors can be speculum, also can be lens.When it made speculum, two cylindrical taper seat mirrors were the hollow ring body, and two taper seat summit lines are vertical with optical axis; When it made lens, two cylindrical taper seat mirrors were the cylinder bodily form, and two taper seat summit lines and optical axis are on same straight line.
When two cylindrical taper seat mirrors were speculum, the front end face of first mirror was internal conical surface, and the rear end face of second mirror is the outer conical surface mirror; When two cylindrical taper seat mirrors were lens, the front end face of first mirror was the plane, and rear end face is outer conical surface, and the front end face of second mirror is outer conical surface, and rear end face is the plane.
Concrete enforcement principle is as follows: (or outer) taper seat mirror entad led to the hollow hollow beam of unstable cavity laser output in (1) utilized, and made it concentrated to the central optical axis of laser beam; (2) utilize outer (or interior) conical surface mirror that near the above-mentioned light beam that concentrates on the laser beam optical axis is led again, obtain the shaping light beam output along the optical axis direction transmission; (3) two taper seat mirrors are carried out fine adjustment along the relative position of optical axis direction, obtain the circular solids shaping light beam output along the optical axis direction transmission.
The present invention is the main following advantage of tool compared with prior art:
(1) (big as mode volume in the conventional unsteady cavity plurality of advantages of reservation, transverse mode resolution is high) prerequisite under, utilize reflection type optical element that the core of unstable cavity laser output annular beam is reconstructed, to realize the high energy circular solids laser beam output of high light beam quality.
(2) directly utilize the taper seat mirror to carry out shaping, do not increase the structure difficulty of unsteady cavity substantially.
(3) relate generally to reflection or the application of transmissive optical element, so it can bear very high laser power, be suitable for the beam shaping of high power laser light application scenario.
(4) processing of reflection involved in the present invention or transmissive optical element is simple and convenient, low cost of manufacture.
The present invention is (big as mode volume in the conventional unsteady cavity plurality of advantages of reservation, transverse mode resolution is high) prerequisite under, utilize reflection or transmissive optical element can realize the core of unstable cavity laser output annular beam is reconstructed, obtain the high energy circular solids laser beam output of high light beam quality; And the apparatus structure that provides is simple, and working stability has especially overcome prior art and need obtain the deficiency of solid laser beam output by the structure of transforming conventional unsteady cavity.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention 1;
Fig. 2 is the structural representation of the embodiment of the invention 2.
Fig. 3 is the ring-shaped light spot schematic diagram of unstable cavity laser output;
The circular solids hot spot schematic diagram that Fig. 4 exports for the unsteady cavity among the present invention;
Fig. 5 has annular cooling water groove, annular water tank structure of cover plate sketch for the internal conical surface Perimeter Truss Reflector;
Fig. 6 is the right view of annular cooling water groove among Fig. 5;
Fig. 7 is the right view of annular water tank cover plate among Fig. 5;
Fig. 8 has annular cooling water groove, circular channels structure of cover plate sketch for the outer conical surface speculum in the unsteady cavity among the present invention;
Fig. 9 is the left view of annular cooling water groove among Fig. 8;
Figure 10 is the left view of circular channels cover plate among Fig. 8.
Embodiment
The present invention is described in further detail below in conjunction with accompanying drawing.
As shown in Figure 1, present embodiment provide based on the solid light beam of output the unstable cavity laser of laser unstable resonator technology comprise laser bodies 1, internal conical surface Perimeter Truss Reflector 501, outer conical surface speculum 601 and accurate displacement mechanism 7.This laser bodies 1 comprises by what convex mirror 4 and concave mirror 3 positioned opposite constituted just props up pseudo confocal unsteady resonator.
Wherein, internal conical surface Perimeter Truss Reflector 501 with shaft section vertex angle theta is set between the convex mirror 4 that just props up pseudo confocal unsteady resonator and concave mirror 3, the minute surface of internal conical surface Perimeter Truss Reflector 501 is the taper seat shape that caves inward, and mirror body middle part is hollow, the annular solid that is hollow, so that light beam is when being transmitted to concave mirror 3 directions by convex mirror 4 in resonant cavity, the mirror body that this speculum 501 can be passed in the marginal portion of light beam is transferred on the convex mirror 4.
The rotation axes of symmetry a1 of speculum 501 minute surfaces with by convex mirror 4 and the formed unsteady cavity optical axis of concave mirror 3 lines of centres angle at 45.
Outer conical surface speculum 601 is arranged on unsteady cavity optical axis below, and itself and described internal conical surface Perimeter Truss Reflector 501 are staggered relatively.The minute surface of outer conical surface speculum 601 is the taper seat shape to outer lug, and has same axis cross section vertex angle theta with speculum 501, and two minute surfaces are complementary shape, and minute surface center Q is vertical with described unsteady cavity optical axis with the line of Perimeter Truss Reflector 501 minute surface center P.
The optical axis of the rotation axes of symmetry of internal conical surface Perimeter Truss Reflector 501 and described unstable cavity laser 1 angle at 45, outer conical surface speculum 601 is parallel with internal conical surface Perimeter Truss Reflector 501,
Internal conical surface Perimeter Truss Reflector 501 and outer conical surface speculum 601 can be regulated by described outer conical surface speculum accurate displacement mechanism 7 along the relative position on the PQ line direction.
When light beam is transmitted to concave mirror 3 directions by convex mirror 4, will be expanded M doubly (wherein, M is how much magnification ratios of unsteady cavity) in resonant cavity; Export through the 501 reflection couplings of internal conical surface Perimeter Truss Reflector when reverse transfer the marginal portion 2 that expands the back light beam, and residue core light beam is fed back to and continues in the resonant cavity to participate in vibrating.Because internal conical surface Perimeter Truss Reflector 501 shaft section vertex angle theta to the converging action of light beam, will be concentrated to its place, center axis (being PQ line shown in Figure 1) position in the transmission process outside the chamber gradually through the annular hollow beam of speculum 501 coupling outputs; Utilize and lead again with near 601 pairs of light beams that shrink central axis of outer conical surface speculum of described internal conical surface Perimeter Truss Reflector 501 corresponding parallel installations, to obtain along the shaping light beam output that is parallel to the transmission of unsteady cavity optical axis direction; By conical reflector 601 center Q and internal conical surface Perimeter Truss Reflector 501 center P can realize the output of circular solids laser beam along carrying out fine adjustment perpendicular to the distance B (see figure 1) of unsteady cavity optical axis direction to foreign round.
Internal conical surface Perimeter Truss Reflector 501 is rotation symmetric form structure reflecting mirror with outer conical surface speculum 601, makes simply, even can directly adopt ultra-precise cutting to process.
As Fig. 4 ~ shown in Figure 6, the rear portion of internal conical surface Perimeter Truss Reflector 501 has annular cooling water groove 11, have water inlet 9 and delivery port 10 at annular water tank cover plate 8, annular water tank cover plate 8 can adopt welding manner to be tightly connected with the bottom of described internal conical surface Perimeter Truss Reflector 501.
As Fig. 7 ~ shown in Figure 9, the rear portion of outer conical surface speculum 601 has annular cooling water groove 15, have water inlet 13 and delivery port 14 on circular channels cover plate 12 equally, circular channels cover plate 12 can adopt welding manner to be tightly connected with the bottom of described outer conical surface speculum 601.
The light beam 2 of unstable cavity laser 1 output along the PQ line direction transmission perpendicular to described unstable cavity laser 1, and is concentrated to the PQ link position after internal conical surface Perimeter Truss Reflector 501 turns to gradually; Utilize 601 pairs of outer conical surface speculums to concentrate near the light beam of PQ line and lead again, to obtain the shaping light beam output along the optical axis direction transmission; Carry out fine adjustment by the outer conical surface speculum accurate displacement mechanism relative position of 7 pairs of described outer conical surface speculums 601 on the PQ direction, realize the circular solids shaping light beam output along the optical axis direction transmission.
As shown in Figure 2, the unstable cavity laser of laser unstable resonator technology based on the solid light beam of output that provides of present embodiment comprises laser bodies 1, outer conical surface lens 502, internal conical surface lens 602 and accurate displacement mechanism 7.This laser bodies 1 comprises by what convex mirror 4 and concave mirror 3 positioned opposite constituted just props up pseudo confocal unsteady resonator.
In the present embodiment, outer conical surface lens 502 are arranged on convex mirror 4 rears, and these lens 502 mirror bodies are column, mirror body one end end face is the plane, other end end face is the taper seat of outside protrusion, and the shaft section drift angle of this conical surface is θ ', and the optical axis of its rotation axes of symmetry and unsteady cavity is on same straight line.Light beam in resonant cavity by concave mirror 3 outside reflex times, a part is transmitted into and continues concussion on the convex mirror 4 in resonant cavity, another part is parallel to be mapped on the planar ends of lens 502 of convex mirror 4 back, and the taper seat end through transferring to the other end and refraction back are concentrated to optical axis direction.
It is placed with internal conical surface lens 602 relatively at outer conical surface lens 502 rears.These internal conical surface lens 602 are column, and in the face of the end face of the taper seat of outer conical surface lens 502 is the taper seat shape that caves inward, its shaft section drift angle also is θ ', form complementary profile with the taper seat of outer conical surface lens 502.The other end of internal conical surface lens 602 is the plane, and the rotation axes of symmetry of these internal conical surface lens 602 and the optical axis of unsteady cavity are on same straight line.Light beam after 502 refractions of outer conical surface lens is injected on the taper seat that caves inward of internal conical surface lens 602, and the transmission back is by the planar end ejaculation of the other end.
Outer conical surface lens 502 are rotation symmetric form structure lens with internal conical surface lens 602, make simply, even can directly adopt ultra-precise cutting to process.
The light beam 2 of unstable cavity laser 1 output is after 502 refractions of outer conical surface lens, and emergent ray is to the optical axis position deviation of unstable cavity laser 1; Utilize 602 pairs of deviation light of internal conical surface lens to reflect again, near the light beam that shrinks the unsteady cavity optical axis is led again, make light be parallel to the optical axis direction transmission; On optical axis direction, carry out fine adjustment with the relative position of outer conical surface lens 502 by 7 pairs of described internal conical surface lens 602 of internal conical surface lens accurate displacement mechanism, regulate outer conical surface lens 502 and the distance of internal conical surface lens 602 along the unsteady cavity optical axis direction, can realize the circular solids shaping light beam output along the optical axis direction transmission.
Claims (4)
1. the laser unstable resonator of an exportable solid light beam comprises:
Laser bodies (1), it comprises by what convex mirror (4) and concave mirror (3) positioned opposite constituted and just props up pseudo confocal unsteady resonator, the optical axis of the line of centres formation unsteady cavity of this convex mirror (4) and concave mirror (3);
Internal conical surface Perimeter Truss Reflector (501), it is arranged in the laser bodies (1), and be positioned between described convex mirror (4) and the concave mirror (3), the mirror surface of this internal conical surface Perimeter Truss Reflector (501) is the taper seat shape that caves inward, and the mirror body of this speculum (501) is the annular solid of hollow; With
Outer conical surface speculum (601), it is arranged on the optical axis below of unsteady cavity, and it is staggered relatively with described internal conical surface Perimeter Truss Reflector (501), wherein the mirror surface of this outer conical surface speculum (601) is the taper seat shape to outer lug, and its mirror surface central point (Q) is vertical with the optical axis of described unsteady cavity with the line of Perimeter Truss Reflector (501) minute surface central point (P);
It is characterized in that, the mirror surface of described internal conical surface Perimeter Truss Reflector (501) has identical shaft section drift angle with the mirror surface of outer conical surface speculum (601), and be the obtuse angle, and the rotation axes of symmetry of two speculums all with the optical axis of described unsteady cavity angle at 45;
Be transferred on the convex mirror (4) pass the hollow mirror body of speculum (501) through described concave mirror (a 3) beam reflected part after, to continue vibration, another part incides on the mirror surface of internal conical surface Perimeter Truss Reflector (501), and reflex on the mirror surface of described outer conical surface speculum (601), by regulating described internal conical surface Perimeter Truss Reflector (501) and outer conical surface speculum (601) along the relative distance on two central point line (PQ) directions to suitable size, can realize the solid light beam of mirror surface output from described outer conical surface speculum (601).
2. the laser unstable resonator of a kind of exportable solid light beam according to claim 1, it is characterized in that, the bottom of described internal conical surface Perimeter Truss Reflector (501) has the first annular cooling water groove, the annular water tank cover plate that has water inlet and delivery port covers on this first annular cooling water groove, and is tightly connected with the bottom of described internal conical surface Perimeter Truss Reflector (501).
3. device according to claim 1 and 2, it is characterized in that, the rear portion of described outer conical surface speculum (601) has the second annular cooling water groove, the circular channels cover plate that has water inlet and delivery port covers on this second annular cooling water groove, and is tightly connected with the bottom of described outer conical surface speculum (601).
4. method of utilizing laser unstable resonator to export solid light beam comprises:
Between convex mirror (4) in the laser body device (1) of laser unstable resonator and the concave mirror (3) internal conical surface Perimeter Truss Reflector (501) is set, and make through described concave mirror (a 3) beam reflected part and incide step on the mirror surface of internal conical surface Perimeter Truss Reflector (501), wherein the mirror surface of this internal conical surface Perimeter Truss Reflector (501) is the taper seat shape that caves inward, and the mirror body of this speculum (501) is the annular solid of hollow;
Outer conical surface speculum (601) is set below the optical axis of described laser unstable resonator, and make reverberation on the mirror surface of internal conical surface Perimeter Truss Reflector (501) shine on the mirror surface of described outer conical surface speculum (601) and the step of reflection back output, wherein this outer conical surface speculum (601) mirror surface central point (Q) is vertical with the optical axis of described unsteady cavity with the line of internal conical surface Perimeter Truss Reflector (501) minute surface central point (P); And
Regulate described internal conical surface Perimeter Truss Reflector (501) and the step of outer conical surface speculum (601) along the relative distance on two central point line (PQ) directions to suitable size, can make that the light beam of exporting from the mirror surface of described outer conical surface speculum (601) is solid light beam.
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| CN107221830A (en) * | 2017-07-27 | 2017-09-29 | 中国科学院长春光学精密机械与物理研究所 | A kind of unsteady cavity single-frequency laser output device |
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| CN105305222A (en) * | 2014-07-28 | 2016-02-03 | 中国科学院大连化学物理研究所 | Raman laser capable of outputting variable-obscuration-ratio annular beam |
| CN109861068B (en) * | 2017-11-30 | 2020-02-07 | 中国科学院大连化学物理研究所 | UR90 cavity structure, UR90 cavity deformation structure and slab laser that can be used for miniaturized slab laser |
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