CN101404381A - Code-output acoustooptic modulating Q impulse CO2 laser capable of tuning wavelength - Google Patents
Code-output acoustooptic modulating Q impulse CO2 laser capable of tuning wavelength Download PDFInfo
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- CN101404381A CN101404381A CNA2008100514334A CN200810051433A CN101404381A CN 101404381 A CN101404381 A CN 101404381A CN A2008100514334 A CNA2008100514334 A CN A2008100514334A CN 200810051433 A CN200810051433 A CN 200810051433A CN 101404381 A CN101404381 A CN 101404381A
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Abstract
A coding output acousto-optic modulator Q pulsing CO2 laser with tunable wavelength belongs to the laser related in the field of laser technology, which aims at solving the technical problem of providing the coding output acousto-optic modulator Q pulsing CO2 laser with tunable wavelength. The technical proposal comprises a holophote, a discharge gain area, a Brewster window, an acousto-optic modulator, an intersection angle cube mirror, raster display, an output reflector, a modulator driving source and an encoded signal controller; an optical axis of a laser resonant cavity formed by the holophote and the raster display is sequentially provided with the holophote, the discharge gain area, the Brewster window, the acousto-optic modulator and the raster display, wherein, the Brewster window and the optical axis are installed in a way of forming fixed included angle, the incident face of the acousto-optic modulator is vertical to the optical axis, the acousto-optic modulator is connected with the modulator driving source by cables, and the modulator driving source is connected with the encoded signal controller by cables; the reflection plane of the raster display and the reflection plane of the intersection angle cube mirror are installed in a way of forming fixed angle, and the output reflector is arranged on the optical axis of the light ray reflected by the intersection angle cube mirror.
Description
Technical field
The invention belongs to a kind of novel pulse CO that relates in the laser technology field
2Laser.
Technical background
CO
2Laser can produce the laser output of 9 μ m～11 μ m, and this wave band is in the atmospheric window of beam Propagation just, thus in laser ranging, test the speed, aspects such as imaging radar, environment detection and space communication have broad application prospects.In using, these all need laser with pulse mode work, and often need laser to possess following three characteristics: narrower light pulsewidth, laser output wavelength is tunable, laser pulse number and pulse frequency can be set arbitrarily and control, but existing similar laser all fails to satisfy simultaneously the specification requirement of above-mentioned three aspects, thus restriction and influenced this The Application of Technology and development.
The prior art the most approaching with the present invention is people's propositions such as Chengdu University of Electronic Science and Technology's Li JianJun, is published in the 3rd phase of " Chinese laser " nineteen ninety-five, as shown in Figure 1.This laser comprises completely reflecting mirror 1, discharge gain region 2, Brewster window 3, acousto-optic modulator 4, output window 5 and modulators drives source 6.This structure utilizes the method for acousto-optic Q modulation to realize that the quasi wave leader is towards CO
2Laser operation, and pulsewidth is compressed to 100ns, peak power reaches 2000W, has certain practical value.But this laser can only be exported the laser of single wavelength, and can't realize any setting and the control of the tuning and pulse frequency and the umber of pulse of laser output wavelength, so still can not satisfy most actual instructions for use.
Summary of the invention
For overcoming the defective that prior art exists, satisfy in the national development practical application request to this technology, our design has also been developed a kind of novel CO
2Laser.
The technical problem to be solved in the present invention is: the coding output acousto-optic Q modulation pulse CO that a kind of tunable wave length is provided
2Laser.The technical scheme of technical solution problem comprises completely reflecting mirror 7, discharge gain region 8, Brewster window 9, acousto-optic modulator 10, corner speculum 11, grating 12, output reflector 13, modulators drives source 14 and code signal controller 15 as shown in Figure 2.On the optical axis of the laser resonant cavity that completely reflecting mirror 7 and grating 12 constitutes, the completely reflecting mirror 7 that arrays from left to right, discharge gain region 8, Brewster window 9, acousto-optic modulator 10, grating 12; Wherein completely reflecting mirror 7, discharge gain region 8, Brewster window 9 threes are one, constitute the enclosed type laser tube that produces laser gain, the angle that becomes to fix between Brewster window 9 and the optical axis is installed, the difference that the material of Brewster window 9 is selected, the angle of angle is also different, the material of Brewster window 9 is ZnSe, becomes 67.4 ° of angles between Brewster window 9 and the optical axis; The plane of incidence of acousto-optic modulator 10 is vertical with optical axis, and acousto-optic modulator 10 and modulators drives source 14 are connected by cable, and modulators drives source 14 and code signal controller 15 are connected by cable; The angle that becomes to fix between the reflecting surface of the reflecting surface of grating 12 and corner speculum 11 is installed, and output reflector 13 is installed on the optical axis of reflection ray of corner speculum 11.
The operation principle explanation: the present invention is based on a kind of novel C O of acousto-optic Q modulation principle, the tuning principle of grating wavelength and the design of code signal control technology
2Laser.Grating 12 and completely reflecting mirror 7 constitute the resonant cavity of lasers, and laser is the output of one-level vibration zero level.During laser works, realize the tuning of laser output wavelength by reflecting surface normal and the angle α between the optical axis that regulates grating 12, tuning range 9.2 μ m～10.8 μ m, provide the standard TTL control signal of establishment on request by code signal controller 15 for modulators drives source 14, thereby realize the coding output of the tuning and laser pulse of this laser output wavelength.Grating 12 is installed on the same turntable with corner speculum 11, the intersection that the reflecting surface of the reflecting surface of grating 12 and corner speculum 11 forms is the axis of turntable, grating 12 and corner speculum 11 have just been formed a corner reflector like this, principle according to corner reflector, during rotating grating 12 tuning wavelengths, the direction of outgoing laser beam will remain unchanged.
Good effect of the present invention: the method by acousto-optic Q modulation, grating output has realized CO
2Output of the burst pulse of laser and optical maser wavelength tuning, and realized any coding control of laser output pulse by the code signal controller, remedied the deficiency of original technology, satisfied in the practical application specification requirement this laser at aspects such as wavelength tuning and pulse controls; The outbound course of laser beam remains unchanged when utilizing the principle of corner reflector to realize wavelength tuning, has strengthened the serviceability of this laser.
Description of drawings
Fig. 1 is the acousto-optic Q modulation pulse CO of prior art
2The laser structure schematic diagram;
Fig. 2 is tunable acousto-optic Q modulation pulse CO of the present invention
2The laser structure schematic diagram.
Embodiment:
The present invention implements by structure shown in Figure 2, wherein completely reflecting mirror 7 is a concave mirror, radius of curvature R=2500mm～3500mm, discharge gain region 8 is made by horminess glass tube, internal diameter φ 7mm～φ 8mm, Brewster window 9 materials are ZnSe, and angle is 67.4 ° between the optical axis, acousto-optic modulator 10 is made by the Ge crystal, the centre frequency in modulators drives source 14 is 40KHz, pulse repetition frequency 0.1Hz～100KHz, the standard TTL signal of code signal controller 15 exportable any settings, grating 12 are 100 lines/mm～150 lines/mm metal grating at former quarter.
Claims (1)
1, a kind of coding of tunable wave length output acousto-optic Q modulation pulse CO
2Laser comprises completely reflecting mirror, discharge gain region, Brewster window, acousto-optic modulator and modulators drives source; It is characterized in that also comprising back corner speculum (11), grating (12), output reflector (13) and code signal controller (15); On the optical axis of the laser resonant cavity that completely reflecting mirror (7) and grating (12) constitute, the completely reflecting mirror that arrays from left to right (7), discharge gain region (8), Brewster window (9), acousto-optic modulator (10), grating (12); Wherein completely reflecting mirror (7), discharge gain region (8), Brewster window (9) three are one, constitute the enclosed type laser tube that produces laser gain, the angle that becomes to fix between Brewster window (9) and the optical axis is installed, the difference that the material of Brewster window (9) is selected, the angle of angle is also different, the material of Brewster window (9) is ZnSe, becomes 67.4 ° of angles between Brewster window (9) and the optical axis; The plane of incidence of acousto-optic modulator (10) is vertical with optical axis, and acousto-optic modulator (10) is connected by cable with modulators drives source (14), and modulators drives source (14) are connected by cable with code signal controller (15); The angle that becomes to fix between the reflecting surface of grating (12) and the reflecting surface of corner speculum (11) is installed, and output reflector (13) is installed on the optical axis of reflection ray of corner speculum (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100514334A CN101404381B (en) | 2008-11-18 | 2008-11-18 | Code-output acoustooptic modulating Q impulse CO2 laser capable of tuning wavelength |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100514334A CN101404381B (en) | 2008-11-18 | 2008-11-18 | Code-output acoustooptic modulating Q impulse CO2 laser capable of tuning wavelength |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101404381A true CN101404381A (en) | 2009-04-08 |
| CN101404381B CN101404381B (en) | 2010-10-13 |
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| CN2008100514334A Expired - Fee Related CN101404381B (en) | 2008-11-18 | 2008-11-18 | Code-output acoustooptic modulating Q impulse CO2 laser capable of tuning wavelength |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102053447B (en) * | 2009-05-21 | 2012-07-18 | 中国科学院长春光学精密机械与物理研究所 | CO2 laser wavelength tuning device with wavelength display function |
| CN103594917A (en) * | 2013-10-31 | 2014-02-19 | 中国科学院长春光学精密机械与物理研究所 | Double-acousto-optic Q-switched CO2 laser device |
| CN103944058A (en) * | 2014-04-23 | 2014-07-23 | 北京镭海激光科技有限公司 | Laser beam synthesizing device and laser beam synthesizing method |
| CN105207713A (en) * | 2015-08-17 | 2015-12-30 | 东南大学 | Wavelength pulse width coding and decoding method and light encoder |
| CN107005019A (en) * | 2014-09-18 | 2017-08-01 | 费哈激光技术有限责任公司 | Tune Q CO with acousto-optic modulator2Laser materials processing system |
| CN110082655A (en) * | 2019-05-13 | 2019-08-02 | 国网北京市电力公司 | Visualization device detection method and instrument and its application in smart grid |
-
2008
- 2008-11-18 CN CN2008100514334A patent/CN101404381B/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102053447B (en) * | 2009-05-21 | 2012-07-18 | 中国科学院长春光学精密机械与物理研究所 | CO2 laser wavelength tuning device with wavelength display function |
| CN103594917A (en) * | 2013-10-31 | 2014-02-19 | 中国科学院长春光学精密机械与物理研究所 | Double-acousto-optic Q-switched CO2 laser device |
| CN103944058A (en) * | 2014-04-23 | 2014-07-23 | 北京镭海激光科技有限公司 | Laser beam synthesizing device and laser beam synthesizing method |
| CN107005019A (en) * | 2014-09-18 | 2017-08-01 | 费哈激光技术有限责任公司 | Tune Q CO with acousto-optic modulator2Laser materials processing system |
| CN105207713A (en) * | 2015-08-17 | 2015-12-30 | 东南大学 | Wavelength pulse width coding and decoding method and light encoder |
| CN105207713B (en) * | 2015-08-17 | 2017-11-28 | 东南大学 | A kind of wavelength pulsewidth decoding method and optical encoder |
| CN110082655A (en) * | 2019-05-13 | 2019-08-02 | 国网北京市电力公司 | Visualization device detection method and instrument and its application in smart grid |
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| Publication number | Publication date |
|---|---|
| CN101404381B (en) | 2010-10-13 |
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Granted publication date: 20101013 Termination date: 20111118 |