CN102496838A - Installation apparatus of high power unstable cavity laser output terminal cavity mirror - Google Patents
Installation apparatus of high power unstable cavity laser output terminal cavity mirror Download PDFInfo
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- CN102496838A CN102496838A CN2011103799084A CN201110379908A CN102496838A CN 102496838 A CN102496838 A CN 102496838A CN 2011103799084 A CN2011103799084 A CN 2011103799084A CN 201110379908 A CN201110379908 A CN 201110379908A CN 102496838 A CN102496838 A CN 102496838A
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Abstract
The invention, which belongs to the high power gas laser technology field, relates to an installation apparatus of a high power unstable cavity laser output terminal cavity mirror. The installation apparatus is used for installing an unstable cavity laser output terminal cavity mirror that is formed by a small convex mirror and an output window. The installation apparatus comprises an annular pad, two branch pipes and a cavity mirror gland. The internal portion of the small convex mirror has a hollow structure; and an opposite through hole is processed at a cylindrical radial direction of the small convex mirror. Inner sides of the two branch pipes are communicated with the internal portion of the small convex mirror at the radial direction by the opposite through hole; and outboards of the two branch pipes are sealedly connected with the small convex mirror. The two branch pipes are fixed on the annular pad as well as respectively pass through the annular pad and the cavity mirror gland at the radial direction; and the two branch pipes are sealedly connected to the fixed position of the annular pad. The annular pad and the output window are fixed at a laser working chamber wall by the cavity mirror gland; and contact surfaces between the laser working chamber wall, the annular pad, the output window and the cavity mirror gland are in sealed connection. According to the invention, the small convex mirror will not be deformed or damaged under high power laser irradiation, so that it can be ensured that laser can be stably output in the long term.
Description
Technical field
The invention belongs to the high power gas laser technical field, particularly optical resonator adopts the gas laser output chamber mirror mounting assembly of unsteady cavity pattern.
Background technology
The laser optical resonant cavity is divided into stable cavity, unsteady cavity and three kinds of patterns of critical resonator.High power gas laser adopts " flat-recessed " usually, and (speculum is the gold-plated film concave spherical surface of a fine copper completely reflecting mirror to stable cavity; Output window is a zinc selenide plating deielectric-coating planar section speculum); The benefit of this chamber type is that the output energy is high; Certain preventing mismatching ability is arranged, and shortcoming is that beam divergence angle is bigger.For obtaining small divergence angle simultaneously and, needing to adopt the unsteady cavity pattern than the laser of macro-energy.Unsteady cavity has multiple chamber type; Like confocal cavity, plano-convex chamber, symmetric cavity etc., in high energy laser system, generally adopt empty burnt R-branch unsteady cavity; As shown in Figure 1; Constitute optical resonator by a big concave mirror 1 (the gold-plated film concave spherical surface of fine copper completely reflecting mirror) and a little convex mirror 2 (the protruding sphere completely reflecting mirror of the gold-plated film of fine copper), adopt zinc selenide full impregnated level crossing as laser output window 3, this window also is the potted component in laser works chamber.This is a kind of telescope type unsteady cavity, and big concave mirror 1 is empty confocal outside resonant cavity with little convex mirror 2.Its propagation principle is: become the plane wave that is parallel to optical axis after an axle spherical wave that is sent by focus advances to 1 reflection of big concave mirror, after this plane wave advances to little convex mirror 2 reflections, become again and be equivalent to the spherical wave that sent by focus.After the limited number of time reflection, the plane wave laser from big concave mirror 1 reflects sees through the full impregnated level crossing along little convex mirror 2 outer rims and outputs to outside the laser works chamber, forms the ring-shaped light spot of a hollow in the near field, and then developing in the far field is a solid hot spot.
Between big concave mirror 1 and the little convex mirror 2 is gain medium, because of little convex mirror 2 is in laser output with output window 3, generally both is referred to as unsteady cavity output chamber mirror.In high power unsteady cavity gas laser development, because little convex mirror 2 light-receiving areas and volume are all very little, when the laser radiation of bearing high-energy-density very, temperature sharply raises, and is easy to deform and damage, and influences the stable output of laser.
Summary of the invention
Deform down or damage in high power laser light irradiation in order to solve the medium and small convex mirror of prior art, and influence the technical problem that the laser long-term stability is exported, the present invention provides a kind of high power unstable cavity laser output chamber mirror mounting assembly.
The technical scheme that technical solution problem of the present invention is taked is following:
High power unstable cavity laser output chamber mirror mounting assembly is used to install the unstable cavity laser output chamber mirror that is made up of little convex mirror and output window, and this erecting device comprises air ring, two arms and chamber mirror gland; The inside of little convex mirror is hollow-core construction, at its outer circle diameter to the relative through hole of processing; The inboard of two arms is radially communicating with the inside of little convex mirror through said relative through hole, and the outside of two arms and little convex mirror are tightly connected; Two arms are fixed on the air ring, and pass air ring and chamber mirror gland diametrically respectively, and the fixed position of two arms and air ring is for being tightly connected; Air ring and output window are fixed on the wall of laser works chamber through chamber mirror gland, and the contact-making surface between laser works chamber wall, air ring, output window and the chamber mirror gland is for being tightly connected.
When laser is launched; Being full of little convex mirror inner space by end arm feeding cooling fluid flows out from other end arm; Can instantaneously will spread out of because of the heat that laser radiation produces on little convex mirror; Little convex mirror temperature is not raise and constant, thereby do not deform or damage, and then can not influence the long-term stability output of laser.
Description of drawings
Fig. 1 is the empty burnt R-branch unsteady cavity sketch map of prior art.
Fig. 2 is the structural representation of high power unstable cavity laser output of the present invention chamber mirror mounting assembly.
Among the figure: 1, big concave mirror, 2, little convex mirror, 3, output window, 4, air ring, 5, arm, 6, chamber mirror gland, 7, laser works chamber wall.
Embodiment
Below in conjunction with accompanying drawing the present invention is explained further details.
As shown in Figure 2, high power unstable cavity laser output of the present invention chamber mirror mounting assembly is used to install the unstable cavity laser output chamber mirror that is made up of little convex mirror 2 and output window 3, and this erecting device comprises air ring 4, two arms 5 and chamber mirror glands 6.
Little convex mirror 2 inside are hollow-core construction; This hollow-core construction can be formed by multiple mode; Seal and be welded as after little convex mirror 2 non-illumination ends (right-hand member the figure) process groove, adding end cap again; To the relative through hole of processing, the internal diameter of this through-hole diameter and arm 5 is suitable basically at little convex mirror 2 outer circle diameters.To also processing relative through hole, the external diameter of this through-hole diameter and arm 5 is suitable basically, and can arm 5 be penetrated at the outer circle diameter of air ring 4.Two arms 5 link into an integrated entity with sealing welding (being that weld seam does not have leakage) mode at contact position with little convex mirror 2 and air ring 4 respectively.Adopt chamber mirror gland 6 that air ring 4 (comprising little convex mirror 2 and arm 5) is fixedly mounted on the laser works chamber wall 7 with output window 3, the position of on chamber mirror gland 6, occuring simultaneously with arm 5 has dead slot, can avoid not contacting with arm 5, thereby not influence installation.Contact-making surface between laser works chamber wall 7, air ring 4, output window 3 and the chamber mirror gland 6 all is tightly connected, and for example uses sealing ring, makes the left side (in the laser works chamber) of output window 3 and right side (atmospheric side) remain on sealing state.
The liquid cooled device of peripheral hardware is linked to each other with an arm 5 through pipeline, when laser works, cooling fluid is flowed into from this arm 5; Be full of and flow through the inner space of little convex mirror 2; Flow out from another root arm 5, can the photo-thermal energy that little convex mirror 2 absorbs be taken out of rapidly like this, make little convex mirror 2 remain on lower and stationary temperature under; Do not deform and damage phenomenon, thereby realize the long-term stability output of unsteady cavity laser.
Claims (2)
1. high power unstable cavity laser output chamber mirror mounting assembly; Be used for installing the unstable cavity laser output chamber mirror that constitutes by little convex mirror (2) and output window (3); It is characterized in that this erecting device comprises air ring (4), two arms (5) and chamber mirror gland (6); The inside of little convex mirror (2) is hollow-core construction, at its outer circle diameter to the relative through hole of processing; The inboard of two arms (5) is radially communicating with the inside of little convex mirror (2) through said relative through hole, and the outside of two arms (5) and little convex mirror (2) are tightly connected; Two arms (5) are fixed on the air ring (4), and pass air ring (4) and chamber mirror gland (6) diametrically respectively, and the fixed position of two arms (5) and air ring (4) is for being tightly connected; Air ring (4) is fixed on the laser works chamber wall (7) through chamber mirror gland (6) with output window (3), and the contact-making surface between laser works chamber wall (7), air ring (4), output window (3) and the chamber mirror gland (6) is for being tightly connected.
2. high power unstable cavity laser output as claimed in claim 1 chamber mirror mounting assembly; It is characterized in that; Being tightly connected between the outside of said two arms (5) and the little convex mirror (2), and being tightly connected between two arms (5) and the air ring (4) is the sealing welding; Contact-making surface between said laser works chamber wall (7), air ring (4), output window (3) and the chamber mirror gland (6) uses sealing ring to be tightly connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103799084A CN102496838A (en) | 2011-11-25 | 2011-11-25 | Installation apparatus of high power unstable cavity laser output terminal cavity mirror |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103799084A CN102496838A (en) | 2011-11-25 | 2011-11-25 | Installation apparatus of high power unstable cavity laser output terminal cavity mirror |
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| CN102496838A true CN102496838A (en) | 2012-06-13 |
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| CN2011103799084A Pending CN102496838A (en) | 2011-11-25 | 2011-11-25 | Installation apparatus of high power unstable cavity laser output terminal cavity mirror |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103872566A (en) * | 2012-12-10 | 2014-06-18 | 中国科学院大连化学物理研究所 | Adjustable low-loss intracavity Raman laser frequency shifter |
| CN103913096B (en) * | 2014-03-26 | 2015-06-10 | 中国科学院长春光学精密机械与物理研究所 | Large-diameter high-energy laser emission window |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202025978U (en) * | 2010-09-07 | 2011-11-02 | 武汉大族金石凯激光系统有限公司 | Unstable resonant cavity used for transverse flow carbon dioxide laser |
-
2011
- 2011-11-25 CN CN2011103799084A patent/CN102496838A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202025978U (en) * | 2010-09-07 | 2011-11-02 | 武汉大族金石凯激光系统有限公司 | Unstable resonant cavity used for transverse flow carbon dioxide laser |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103872566A (en) * | 2012-12-10 | 2014-06-18 | 中国科学院大连化学物理研究所 | Adjustable low-loss intracavity Raman laser frequency shifter |
| CN103872566B (en) * | 2012-12-10 | 2017-07-21 | 中国科学院大连化学物理研究所 | A kind of adjustable low-loss intracavitary Raman laser frequency shifter |
| CN103913096B (en) * | 2014-03-26 | 2015-06-10 | 中国科学院长春光学精密机械与物理研究所 | Large-diameter high-energy laser emission window |
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Application publication date: 20120613 |