CN1089496C - Gain switch type high repetitive frequency pulsed CO2 laser - Google Patents
Gain switch type high repetitive frequency pulsed CO2 laser Download PDFInfo
- Publication number
- CN1089496C CN1089496C CN 97122024 CN97122024A CN1089496C CN 1089496 C CN1089496 C CN 1089496C CN 97122024 CN97122024 CN 97122024 CN 97122024 A CN97122024 A CN 97122024A CN 1089496 C CN1089496 C CN 1089496C
- Authority
- CN
- China
- Prior art keywords
- laser
- discharge tube
- type high
- switch type
- gain switch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Lasers (AREA)
Abstract
The present invention relates to a gain switch type high repetition frequency pulse CO2 laser which comprises a spherical reflecting mirror 31, a partial transmission output mirror 32, a longitudinal pulse discharge tube 33, a cooling sleeve 34, a negative electrode 35, a positive electrode 36 and a high repetition frequency narrow pulse generator 37 connected with the negative electrode 35 and positive electrode 36. The laser of the present invention has the advantages of simple structure and reliable performance and can be widely used in the fields of target detection, laser tracking, pollution detection, laser parameter measurement, etc.
Description
The invention belongs to laser, particularly a kind of gain switch type high repetitive frequency pulsed CO that spreads cooling
2Laser.
In order to produce high repetition frequency, burst pulse (microsecond or submicrosecond level) CO
2Laser adopts two kinds of technology usually.First kind of technology is TEA (transverse excitation atmosphere) CO
2Laser.The TEA laser works adopts the high voltage lateral pulsed discharge excitation under atmospheric pressure or sub-atmospheric pressure, produce narrow-pulse laser.In order to realize high pulse repetition frequency, the essential convection current cooling technology that adopts, circulating current device in the laser cavity makes laser gas cross-current overdischarge active region (laser gain district), and the hot gas of discharge generation is transported to and carries playback electricity active region in the heat exchanger after the cooling again.Second kind of technology is Q switching CO
2Laser.This type of laser adopts low pressure continuous discharge excitation.The Q value of laserresonator can be undergone mutation periodically, thus the narrow-pulse laser in the cycle of generation.The mode of Q switching has mechanical rotating mirror, electro-optical Q-switch or acoustooptic Q-switching etc.Above-mentioned two kinds of technology itself exist shortcoming separately, for example high repetition frequency TEACO
2Laser needs the complicated gas circulation cooling system of a cover.Q switching CO
2Laser needs the complicated and expensive Q switching device of a cover.See beautiful, the field Dai Meifu of the green river of document gram, Japanese laser research, the 462nd page of No. the 4th, the 21st volume put down in April, 5 (1993); W.Fuss, Etal Appl.Phys.B5565-70 (1992).
The objective of the invention is to propose a kind of high repetitive frequency pulsed CO
2Laser.
For achieving the above object, gain switch type high repetitive frequency pulsed CO
2Laser comprises spherical reflector 31, part transmission outgoing mirror 32, discharge tube 33, coolant jacket 34, negative electrode 35, anode 36, the negative pole and the positive pole that it is characterized in that drive pulse generator 37 are connected on negative electrode 35 and the anode 36, its pulse duration is 0.1 μ s-5 μ s, pulse repetition frequency is 1KHz-20KHz, the caliber of discharge tube 33 is 10mm-2mm, and intraductal atmospheric pressure is 3*10
3Pa-1*10
4Pa.
The present invention is simple in structure, stable and reliable for performance, can be widely used in target acquisition, Laser Tracking, pollution detection and laser parameter test.
Description of drawings
Fig. 1 is high repetition frequency TEACO
2The laser schematic diagram.
11-laser cavity, 12-main discharge electrode, 13-preionization spark pin array, 14-heat exchanger 15 among the figure-tangential blower fan 16-baffler
Fig. 2 is the Q switching CO that adopts tilting mirror
2The laser schematic diagram.
21-discharge negative electrode, 22-discharge anode, 23-discharge tube, 24-Brewster window, 25-laser output mirror 26-Q switch tilting mirror, 27-coolant jacket among the figure
Fig. 3 is a schematic diagram of the present invention.
31-spherical reflector, 32-part transmission outgoing mirror, 33-longitudinal discharge pipe, 34-coolant jacket, 35-negative electrode, 36-anode, 37-drive pulse generator among the figure
Fig. 4 is the various waveforms of the principle of the invention.
The impulse waveform B of A among the figure-electric excitation power-population inversion concentration and time relation of laser levels under the condition of no laserresonator.Because the small signal gain of laser is directly proportional with population inversion concentration, therefore this curve has also been represented the time relationship C-population inversion concentration and the time relation when laserresonator is arranged of laser gain, the rapid sloping portion of curve represents that laser field intensity causes the saturated D of laser gain-laser pulse output waveform after sharply rising in the resonant cavity among the figure, and the rapid rising part of laser pulse is just in time corresponding with gain saturation district among the C figure among the figure.
Fig. 5 is an application example figure of the present invention
51-sphere completely reflecting mirror, 52-part transmission outgoing mirror 53-ceramic discharge tube, 54-metal or plastic cool cover, 55-negative electrode (or anode), 56-anode (or negative electrode), 57-drive pulse generator among the figure
Below in conjunction with accompanying drawing 3 in detail the present invention is described in detail. The air pressure of laser gas is medium in the laser instrument of the present invention Air pressure range generally is 3*103Pa-1*10
4Pa adopts small-bore longitudinal discharge pipe, and its caliber is 10mm-2mm, the diffusion cooling, the high repetition frequency Fast pulsed discharge encourages to produce high repetition frequency, burst pulse swashs Light, its repetition rate are 1KHz-20KHz. The present invention adopts the excitation of high voltage fast pulse, its pulse width In the microsecond scope, its pulse width is 0.1 μ s-5 μ s, suitably chooses the gas of laser working gas in addition Press and the bore of discharge tube, can make the laser levels population can be rapid in the time interval in microsecond or submicrosecond Ground forms, and the formation time of the laser light field in this time interval and the laserresonator is suitable, therefore can Produce the narrow-pulse laser of " gain switch type ".
Provide one embodiment of the present of invention below.Among Fig. 3, longitudinal discharge pipe 33 and coolant jacket 34 are made by glass or quartz.Total reflection spherical mirror 31 is the gold-plated and Dielectric High Reflective Films of silicon base.Part transmission outgoing mirror 32 is made by ZnSe, GaAs or Ge semiconductor infra-red material.Pulse generator 37 is that thyratron is the pulse modulator of switch element, and repetition rate is 1KHz-20KHz, and the pulsed discharge width is 0.5 μ s.Laser gas is CO
2, N
2Mixture with He gas.This laser can output pulse width be a microsecond level high repetition frequency laser, and its repetition rate is identical with the repetition rate of pulse modulator.
Fig. 5 is an alternative embodiment of the invention.Discharge tube 53 is the metal to ceramic sealing structure, is composed in series by two sections discharge tubes, and discharge tube 53 two ends anode 56 (or negative electrode) ground connection, negative electrode 55 (or anode) directly connects with pulse generator 57.Coolant jacket 54 is plastics or metal.Other technical indicator and Fig. 3
Embodiment is identical.
Claims (5)
1, gain switch type high repetitive frequency pulsed CO
2Laser, comprise spherical reflector (31), part transmission outgoing mirror (32), discharge tube (33), coolant jacket (34), negative electrode (35), anode (36), the negative pole and the positive pole that it is characterized in that drive pulse generator (37) are connected on negative electrode (35) and the anode (36), its pulse duration is 0.1 μ s-5 μ s, pulse repetition frequency is 1KHz-20KHz, the caliber of discharge tube (33) is 10mm-2mm, and intraductal atmospheric pressure is 3*10
3Pa-1*10
4Pa.
2, by the described gain switch type high repetitive frequency pulsed CO of claim 1
2Laser is characterized in that said discharge tube (33) is the longitudinal discharge pipe.
3, by the described gain switch type high repetitive frequency pulsed CO of claim 1
2Laser is characterized in that described discharge tube is formed by two sections discharge tube serial connections, and the two ends of discharge tube are male or female (56) ground connection, and middle negative electrode or anode (55) join with drive pulse generator (57).
4, by the described gain switch type high repetitive frequency pulsed CO of claim 1
2Laser, the material that it is characterized in that said discharge tube (33) is glass, quartz, pottery.
5, by the described gain switch type high repetitive frequency pulsed CO of claim 1
2Laser, the material that it is characterized in that said coolant jacket (34) is glass, quartz, metal or plastics.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97122024 CN1089496C (en) | 1997-12-15 | 1997-12-15 | Gain switch type high repetitive frequency pulsed CO2 laser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97122024 CN1089496C (en) | 1997-12-15 | 1997-12-15 | Gain switch type high repetitive frequency pulsed CO2 laser |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1220509A CN1220509A (en) | 1999-06-23 |
| CN1089496C true CN1089496C (en) | 2002-08-21 |
Family
ID=5176623
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97122024 Expired - Fee Related CN1089496C (en) | 1997-12-15 | 1997-12-15 | Gain switch type high repetitive frequency pulsed CO2 laser |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1089496C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1106704C (en) * | 1999-10-14 | 2003-04-23 | 中国科学院上海光学精密机械研究所 | Discharge system of Co2 pulse laser device |
| CN106684691B (en) * | 2015-11-09 | 2019-11-12 | 中国科学院大连化学物理研究所 | A kind of Compound Cavity of intracavitary frequency tripling |
| CN105244749A (en) * | 2015-11-11 | 2016-01-13 | 成都微深科技有限公司 | Carbon dioxide laser device with equipotential device |
-
1997
- 1997-12-15 CN CN 97122024 patent/CN1089496C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1220509A (en) | 1999-06-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Comaskey et al. | High average powers diode pumped slab laser | |
| Hurwitz et al. | Electron‐beam‐pumped GaAs laser | |
| CN1089496C (en) | Gain switch type high repetitive frequency pulsed CO2 laser | |
| Menyuk et al. | High‐efficiency high‐average‐power second‐harmonic generation with CdGeAs2 | |
| US4660204A (en) | CO2 TEA laser utilizing an intra-cavity prism Q-switch | |
| Wang et al. | A simple, efficient plastic dye laser | |
| EP0033339A1 (en) | Pulsed rf pumped waveguide laser. | |
| Shu et al. | Diode-side-pumped AO Q-switched Tm, Ho: LuLF laser | |
| Gunarathne et al. | A new stroboscope for schlieren and photoelastic visualization of ultrasound | |
| CN101895055A (en) | Folded-cavity transversely excited atmospheric pressure carbon dioxide laser | |
| Snell et al. | Diode-pumped, high-power CW and modelocked Nd: YLF lasers | |
| CN2566506Y (en) | High effcient high power solid laser for laser diode end-pumping | |
| Milam et al. | Emission characteristics of a tube‐shaped laser oscillator | |
| CN1068719C (en) | Laser oscillation amplifying system with optical fiber phase conjugate lens | |
| Abramski et al. | On the opto-voltaic measurements in CO and CO 2 lasers | |
| Laakmann et al. | The coming of age of waveguide lasers | |
| Wilson et al. | XeF excimer pumping of Nd: P5O14 | |
| Hasson | Compact high-pressure CO2 lasers | |
| CN1035146C (en) | Picosecond pulse plaser with Qi-switch | |
| Berger et al. | Pulse selection and shaping based on gas breakdown | |
| Ostrowski et al. | Modular set of laser designator range finder | |
| Langford et al. | The hybrid mode-locking of a cw Rhodamine 700 dye laser | |
| Goldobin et al. | Generation of single optical pulses of less than 10 psec duration in a two-section heterojunction laser | |
| Minami et al. | Near-infrared subpicosecond pulse generation in a synchronously mode-locked cw dye laser | |
| CN112928592A (en) | Liquid laser compressor with continuously tunable output pulse width |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |