CN201130810Y - Multiple pass type high power transverse flow CO2 laser resonant cavity - Google Patents
Multiple pass type high power transverse flow CO2 laser resonant cavity Download PDFInfo
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- CN201130810Y CN201130810Y CNU2007200947577U CN200720094757U CN201130810Y CN 201130810 Y CN201130810 Y CN 201130810Y CN U2007200947577 U CNU2007200947577 U CN U2007200947577U CN 200720094757 U CN200720094757 U CN 200720094757U CN 201130810 Y CN201130810 Y CN 201130810Y
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Abstract
The utility model relates to a multi-mode high power crosscurrent CO2 laser resonant cavity, belonging to the technical field of laser, which adopts the technical proposal that the resonant cavity comprises a first and a second spherical reflecting mirrors, a first and a second light admitting holes, a first and a second Brewster windows, a discharging gain region, a first and a second spherical reflecting mirror templates, and an output plane mirror. The reflecting surfaces of the first and the second spherical reflecting mirrors are arranged in opposite, the first and the second light admitting holes are respectively opened on the first and the second spherical reflecting mirror templates, and the first and the second spherical reflecting mirror templates respectively contact with the reflecting surfaces of the first and the second spherical reflecting mirrors; the first and the second Brewster windows are arranged between the first and the second spherical reflecting mirrors, and the region between the two Brewster windows is used as the discharging gain region. The reflecting surface of the output plane mirror holds a certain angle with the optical axis during installation, laser passes through the reflecting surfaces of the light admitting holes on the reflecting mirror templates and is reflected in sequence, and finally is sent out of the resonant cavity via the output plane mirror.
Description
Technical field
The utility model belongs to a kind of high-power crossing current CO that relates in the laser technology field
2The resonant cavity of laser.
Technical background
High-power crossing current CO
2The laser output mode is of poor quality, is a major issue that limits its application and development for a long time always.For addressing this problem, before this methods of going into diaphragm or aperture coupling in the chamber interpolation that adopt more, though can realize the improvement of laser output mode relatively simple and efficiently, but owing in fact reduced to participate in the mode volume of laser generation, greatly reduce the conversion efficiency of laser, so have only laser power less demandingly, and do not consider just can take the method modeling under the situation of conversion efficiency.Existing at present several collapsible multipass cavity resonator structure design, with the most approaching prior art of the utility model be that people such as Lu Hong by laser technology National Key Laboratory of HUST propose, be published in " laser magazine " 1999 the 20th the 1st phases of volume, as shown in Figure 1.This cavity resonator structure comprises completely reflecting mirror 1, first planar fold mirror 2, discharge gain region 3, second planar fold mirror 4 and outgoing mirror 5.This structure Design has solved preferably that effective mode volume that diaphragm or aperture coupling process bring reduces, the serious problem that reduces of efficient, has improved laser output mode quality.But the structural design of this resonant cavity, all very high to the required precision that the integral body of the processing of first planar fold mirror 2 and second planar fold mirror 4 and chamber mirror is debug, and in use very difficult elimination parasitic oscillation is to the influence (parasitic mode is owing to the outgoing mirror 5 and first flat-folded total reflective mirror 2, the second flat-folded total reflective mirror 4 formation vibrations, or formation is vibrated and the mould of generation between first planar fold mirror 2 and second planar fold mirror 4) of output mode.Thus, we expect utilizing the principle of multipass cell can realize high-power crossing current CO
2The improvement of laser output mode.The notion of multipass cell (Multiple-pass cell) originates from Pirce propagated paraxial rays in the periodic focusing system in 1954 analysis and the application in electron beam is propagated.1963, Herriott has begun the application study of this technology at optical field, utilize the He-Ne laser to verify the multipass geometry of sphere and astigmatism resonant cavity, point out that the multipass interferometer has potential using value aspect the research of long light path absorption and laser amplifier, also can be used for accurately measuring the reflectivity of speculum, and hint that it can be used as the linear memory of optical delay and is used to carry out the storage and the processing of data.The end of the seventies, this technology successfully was applied to stimulated Raman scattering (SRS), and this also is the method that the realization stimulated Raman scattering that is widely used at present obtains tunable infrared laser.
The operation principle structure of multipass cell as shown in Figure 2, it is made up of spherical reflector staggered relatively 6 and spherical reflector 7.Have first aperture 8 on the spherical reflector 6, have second aperture 9 on the spherical reflector 7, suppose that a branch of light incides in the chamber by first aperture 8 on the spherical reflector 6, in the chamber, form concussion, skew and deflection all can take place with optical axis in each back light beam that comes and goes on 7 of spherical reflector 6 and spherical reflectors, thereby light is advanced in the mode of sinusoidal motion along mirror surface, its amplitude depends on initial situation, deflection angle depends on the parameter g value (referring to Multiple-pass Raman gain cell, APPLIED OPTICS/vol.19.No.2/15January 1980) of resonant cavity.
Summary of the invention
For overcoming the defective that prior art exists, the purpose of this utility model is to provide a kind of can effectively utilize mode volume, and the laser output mode is good, and is simple in structure, easy to adjust, is applicable to the high-power crossing current CO of large volume discharge
2The needs of laser, a kind of cavity resonator structure of ad hoc meter.
The technical problems to be solved in the utility model provides the high-power crossing current CO of a kind of multipass formula
2Laser resonant cavity.The technical scheme of technical solution problem comprises first spherical reflector 10, the first spherical reflector template 11, first light hole 12, the first Bu Shi window 13, discharge gain region 14, the second Bu Shi window 15, the second spherical reflector template 16, second light hole 17, second spherical reflector 18 and output plane speculum 19 as shown in Figure 3.The relative installation of reflecting surface of first spherical reflector 10 and second spherical reflector 18, on the first spherical reflector template 11 and the second spherical reflector template 16, come and go the position of number of times designing requirement according to light beam, have first light hole 12 and second light hole 17, light hole on two spherical reflector lamina membranaceas is circumferential in the edge of spherical reflector lamina membranacea and evenly distributes, effective mode of laser volume of this moment is a maximum, first spherical reflector 10 and the first spherical reflector template 11, second spherical reflector 18 is identical respectively with the radius of curvature of the second spherical reflector template 16, the first spherical reflector lamina membranacea 11 that has first light hole 12 closely contacts with the reflecting surface of first spherical reflector 10, and the second spherical reflector lamina membranacea 16 that has second light hole 17 closely contacts with the reflecting surface of second spherical reflector 18; Being equipped with the first Bu Shi window 13 on the right side of first spherical reflector 10 and the first spherical reflector template 11, being equipped with the second Bu Shi window 15 in the left side of second spherical reflector 18 and the second spherical reflector template 16, is discharge gain region 14 between these two Bu Shi windows; The reflecting surface of output plane speculum and the angled installation of the optical axis of resonant cavity, laser by the light hole exposed portions serve on the speculum lamina membranacea first spherical reflector 10 and after second spherical reflector, 18 surfaces reflect successively, penetrate outside the chambeies by output plane speculum 19.
The operation principle explanation: the utility model is based on a kind of novel high-power crossing current CO of aforesaid multipass cell principle design
2The laser resonant cavity structure.The chamber mirror of laser is made of first spherical reflector 10 staggered relatively and second spherical reflector 18, laser between two mirrors through repeatedly the reflection after, outside plane mirror 19 output cavities, come and go the number of times of concussion by the set positions laser that changes perforate on the first speculum lamina membranacea 11 and the second spherical reflector template 16.
Good effect of the present utility model is: adopt the external cavity type structure, promptly discharge gain region 14 by the first Bu Shi window 13 and 15 sealings of the second Bu Shi window, first spherical reflector 10, the spacing of second spherical reflector 18 can change at any time according to actual conditions and designing requirement, the first spherical reflector template 11 and the second spherical reflector template 16 can come and go the times N design according to the laser concussion, need not to change first spherical reflector 10 and second spherical reflector 18, and can utilize the diameter of first light hole 12 and second light hole 17 and the pattern that laser is exported in the position adjustment, limit the formation of parasitic mode well, realized the crossing current CO of large volume discharge easily
2Laser high power basic mode (or low-order mode) output.
Description of drawings
Fig. 1 is the collapsible crossing current CO of prior art
2The laser resonant cavity structural representation;
Fig. 2 is the laserresonator cross-sectional view of multipass cell know-why design;
Fig. 3 is a cross-sectional view of the present utility model.
Embodiment
The utility model is by multipass formula crossing current CO shown in Figure 3
2The laser resonant cavity structure is implemented.Wherein, first spherical reflector 10 and second spherical reflector 18 are made surface gold-plating and hard coating, diameter of phi 60mm, radius of curvature R 8000mm, two mirror pitch L2000mm by the oxygen-free copper polishing; Discharge gain region 14 sectional dimensions 40 * 40mm; Discharge gain region length is 1800mm; The first Bu Shi window 13 and the second Bu Shi window 15 adopt the polishing of ZnSe material to make 67.4 ° of Brewster angles; The first spherical reflector template 11 and the second spherical reflector template 16 are diffuse reflector made of aluminum, diameter of phi 60mm, radius of curvature R 8000mm, thickness of slab d0.6mm; Output plane speculum 19 is made surface gold-plating, diameter of phi 8mm, its centre-to-centre spacing optical axis 15mm by the oxygen-free copper polishing.First light hole 12 on the first spherical reflector template 11 and second light hole, 17 diameters on the second spherical reflector template 16 are Φ 4.5mm, and the round number of oscillation of laser in the chamber is N=21, and practical laser is output as basic mode.
Claims (1)
1, the high-power crossing current CO of a kind of multipass formula
2Laser resonant cavity, comprise the discharge gain region, it is characterized in that also comprising first spherical reflector (10), the first spherical reflector template (11), first light hole (12), the first Bu Shi window (13), the second Bu Shi window (15), the second spherical reflector template (16), second light hole (17), second spherical reflector (18) and output plane speculum (19); The relative installation of reflecting surface of first spherical reflector (10) and second spherical reflector (18), on the first spherical reflector template (11) and the second spherical reflector template (16), have first light hole (12) and second light hole (17), light hole on two spherical reflector lamina membranaceas is circumferential in the edge of spherical reflector lamina membranacea and evenly distributes, first spherical reflector (10) and the first spherical reflector template (11), second spherical reflector (18) is identical respectively with the radius of curvature of the second spherical reflector template (16), the first spherical reflector lamina membranacea (11) that has first light hole (12) closely contacts with the reflecting surface of first spherical reflector (10), and the second spherical reflector lamina membranacea (16) that has second light hole (17) closely contacts with the reflecting surface of second spherical reflector (18); Be equipped with the first Bu Shi window (13) on the right side of first spherical reflector (10) and the first spherical reflector template (11), being equipped with the second Bu Shi window (15) in the left side of second spherical reflector (18) and the second spherical reflector template (16), is discharge gain region (14) between these two Bu Shi windows; The angled installation of optical axis of the reflecting surface of output plane speculum (19) and resonant cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200947577U CN201130810Y (en) | 2007-12-12 | 2007-12-12 | Multiple pass type high power transverse flow CO2 laser resonant cavity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200947577U CN201130810Y (en) | 2007-12-12 | 2007-12-12 | Multiple pass type high power transverse flow CO2 laser resonant cavity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201130810Y true CN201130810Y (en) | 2008-10-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200947577U Expired - Fee Related CN201130810Y (en) | 2007-12-12 | 2007-12-12 | Multiple pass type high power transverse flow CO2 laser resonant cavity |
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| CN (1) | CN201130810Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107565380A (en) * | 2017-08-29 | 2018-01-09 | 中国航空工业集团公司洛阳电光设备研究所 | A kind of multi-wave length laser device of coaxial output |
| CN110088992A (en) * | 2016-12-06 | 2019-08-02 | 纽波特公司 | Optical Maser System and its application method with multi-pass amplifier |
-
2007
- 2007-12-12 CN CNU2007200947577U patent/CN201130810Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110088992A (en) * | 2016-12-06 | 2019-08-02 | 纽波特公司 | Optical Maser System and its application method with multi-pass amplifier |
| CN107565380A (en) * | 2017-08-29 | 2018-01-09 | 中国航空工业集团公司洛阳电光设备研究所 | A kind of multi-wave length laser device of coaxial output |
| CN107565380B (en) * | 2017-08-29 | 2019-04-16 | 中国航空工业集团公司洛阳电光设备研究所 | A kind of multi-wave length laser device of coaxial output |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081008 Termination date: 20100112 |