CN103594917A - Double-acousto-optic Q-switched CO2 laser device - Google Patents
Double-acousto-optic Q-switched CO2 laser device Download PDFInfo
- Publication number
- CN103594917A CN103594917A CN201310529171.9A CN201310529171A CN103594917A CN 103594917 A CN103594917 A CN 103594917A CN 201310529171 A CN201310529171 A CN 201310529171A CN 103594917 A CN103594917 A CN 103594917A
- Authority
- CN
- China
- Prior art keywords
- laser
- acousto
- optic
- acoustooptic
- switches
- 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.)
- Pending
Links
Images
Landscapes
- Lasers (AREA)
Abstract
The invention discloses a double-acousto-optic Q-switched CO2 laser device and belongs to the technical field of lasers. The double-acousto-optic Q-switched CO2 laser device aims at solving the problems that when a single intracavity acousto-optic Q switch is used in the prior art, the laser operation repetition frequency needs to be reduced for compressing the laser pulse width on the condition of low laser gain, and effective turnoff of lasers cannot be achieved by the single-acousto-optic Q switch on the condition of high laser gain. The laser device is characterized in that a concave total reflector and an output mirror form a laser resonant cavity, a laser tube is used for generating laser oscillations, two acousto-optic Q switches are inserted into the cavity and are used for generating repetition frequency laser output, the two acousto-optic Q switches are respectively connected with a signal generator, the signal generators are used for precisely controlling the working states of the acousto-optic Q switches, a delay controller is respectively connected with the two acousto-optic Q switches and used for precisely controlling the turn-on and turn-off time of the acousto-optic Q switches to enable the acousto-optic Q switches to be turned on and turned off at intervals, and repetition frequency doubling of the output lasers is achieved. The two acousto-optic Q switches are controlled by a synchronizer trigger, and high-repetition-frequency narrow-pulse-width laser output is achieved.
Description
Technical field
The present invention relates to a kind of high repetition frequency, narrow pulse width far infrared CO that adjusts Q based on dual-acousto-optic in chamber
2laser, belongs to laser technology field.
Background technology
Small-sized high repetition frequency, narrow pulse width CO
2laser all has a wide range of applications demand in fields such as laser processing, laser radar, environment detection, laser medicine and sharp light-matter interactions.Current middle-size and small-size CO
2the method that laser is realized pulse output mainly contains electric-optically Q-switched, the mechanical Q of tune and acousto-optic Q modulation.Electric-optically Q-switched common employing CdTe crystal is as switching device, pulse frequency can reach 100kHz, pulse duration can be compressed to hundred ns magnitudes, but conventionally need to use high voltage due to electric-optically Q-switched, structure is comparatively complicated, be unfavorable for realizing the coding output of laser, and CdTe lens lesion threshold value is lower, price is very expensive, machinery adjusts Q normally to utilize to insert the chopper of High Rotation Speed in resonant cavity or tilting mirror to realize, the advantage of the method is simple in structure, cost is low, but is difficult to realize high repetition frequency output owing to being subject to the restriction of chopper rotating speed, and cannot carry out the coding-control of laser pulse, acousto-optic Q modulation adopts Ge crystal as switching device conventionally, by changing the caused diffraction loss of ultrasonic field of periodicity alternation in acousto-optic medium, adjust Q, the method is simple in structure, reliable and stable, Ge lens lesion threshold value is high, but while conventionally adopting in chamber single acoustooptic Q-switching, under lower laser gain, for compress width can only reduce laser operation repetition rate, therefore cannot realize the Laser output of high repetition frequency, and under higher laser gain, single acoustooptic Q-switching cannot be realized effective " shutoff " to oscillating laser, thereby limited the ability of its compress width.
Summary of the invention
When the present invention adopts in chamber single acoustooptic Q-switching in order to solve prior art, under lower laser gain, for compress width can only reduce laser operation repetition rate, and under higher laser gain, single acoustooptic Q-switching cannot be realized the problems such as effective " shutoffs " to oscillating laser, proposes a kind of dual-acousto-optic and adjusts QCO
2laser.
For solving the problems of the technologies described above, technical scheme of the present invention is:
Dual-acousto-optic is adjusted QCO
2laser, concave mirror, acoustooptic Q-switching, laser tube, another acoustooptic Q-switching and outgoing mirror are coaxially placed successively; Concave mirror and outgoing mirror form laserresonator; Laser tube is for generation of laser generation; Two acoustooptic Q-switchings insert in laserresonator, adopt Bragg diffraction vertical incidence mode; Two acoustooptic Q-switchings respectively connect a signal generator, and signal generator is for accurately controlling the operating state of acoustooptic Q-switching; Delay controller connects respectively two acoustooptic Q-switchings, for accurately controlling opening and the turn-off time of acoustooptic Q-switching, makes two acoustooptic Q-switching intervals open and turn-off, and the repetition that realizes Output of laser doubles.
In described laser tube, be filled with Xe gas, the CO of ratio 1:3:8:30
2gas, He gas and H
2gas, total gas pressure 30 holders.
Described outgoing mirror is to CO
2the level crossing that laser part sees through, its material is ZnSe.
Two acoustooptic Q-switchings are controlled by synchronizer trigger, and two acoustooptic Q-switchings of the accurate control of assurance are opened and off state in the while, realize high repetition, the output of narrow pulse width laser.
The invention has the beneficial effects as follows: the first technical scheme is to adopt a delay controller accurately to control the operating state of opening and turn-offing in interval of two acoustooptic Q-switchings, compare with the operating state of single acoustooptic Q-switching, adopt two acoustooptic Q-switchings can realize doubling of laser repetition rate, the repetition rate that is single-Q switch is f, during two Q switching operations, repetition rate is 2f, thereby at lower CO
2under laser gain, improve the operation repetition rate of laser.
The second technical scheme is to adopt a synchronizer trigger to control, and two acoustooptic Q-switchings of the accurate control of assurance are opened and off state in the while, realize the in the situation that of high-gain CO
2effective shutoff of oscillating laser, thus high repetition frequency, narrow pulse width Laser output obtained.
Accompanying drawing explanation
Fig. 1 is acousto-optic Q modulation laser principle schematic.
Fig. 2 is that dual-acousto-optic is adjusted QCO
2laser embodiment mono-schematic diagram.
Fig. 3 is that dual-acousto-optic is adjusted QCO
2embodiment bis-schematic diagrames of laser.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further details.
As shown in Figure 1, acousto-optic Q modulation laser operation principle, acousto-optic Q modulation technology is to adjust Q by changing the caused diffraction loss of ultrasonic field of periodicity alternation in acousto-optic medium.Acoustooptic Q-switching 1 is comprised of radio freqnency generator 1-1, electro-acoustic transducer 1-2, acousto-optic medium 1-3 and sound-absorbing material 1-5 etc.For CO
2laser, acousto-optic medium adopts Ge material conventionally.In resonant cavity interpolation, enter acoustooptic Q-switching, when the high-frequency oscillation signal of radio frequency (RF) power generation is added on the transducer of Q switching, make the variation of the refractive index generating period of acousto-optic medium, form " phase grating " of equivalence, when incident beam 1-4 passes through acousto-optic medium, produce Bragg diffraction.For 0 grade of incident light, can produce 1 order diffraction light (outgoing beam 1-6), have 2 θ
iangle deviating, this angle deflects away from outside resonant cavity light wave, resonant cavity is in the high loss state of low reactance-resistance ratio, thereby accumulated a large amount of inverted populations at upper energy level, but now can not produce laser generation, in other words with Q switching by laser " shutoff ".When the cut effect of high-frequency signal, the ultrasonic field in acousto-optic medium disappears, and resonant cavity sports high Q state of value, and a large amount of inverted populations transit to laser lower level, just form giant pulse Laser output, and now Q switching is equivalent to " opening ".Q value alternately changes once, just exports a laser pulse.
The first technical scheme embodiment of the present invention, as shown in Figure 2, this high repetition frequency, narrow pulse width CO
2laser comprises laser tube for generation of laser gain, the resonant cavity of selecting for generation of laser generation and wavelength, for realizing the acoustooptic Q-switching of pulse laser output and controlling the controller of the parameters such as laser repetition rate, duty ratio.
Dual-acousto-optic is adjusted QCO
2laser, concave mirror 2, acoustooptic Q-switching 1, laser tube 3, another acoustooptic Q-switching 1 and outgoing mirror 4 are coaxially placed successively.By concave mirror 2 and outgoing mirror 4, form laserresonator.Wherein the material of concave mirror 2 is Cu, radius of curvature 4m.Outgoing mirror 4 is to CO
2the level crossing that laser part sees through, its material is ZnSe.In laser tube 3, be filled with Xe gas, the CO of ratio 1:3:8:30
2gas, He gas and H
2gas, total gas pressure 30 holders, make to produce laser gain in laser tube by electric discharge, and the acoustooptic Q-switching 1 of two Ge materials inserts in chamber, adopts Bragg diffraction vertical incidence mode, for generation of Repetition Frequency Laser, exports; Two acoustooptic Q-switchings 1 respectively connect a signal generator 5, and signal generator 5, for accurately controlling the operating state of acoustooptic Q-switching 1, comes and goes vibration situation thereby control oscillating laser bundle in chamber.In this scheme, adopt delay controller 6 to connect two acoustooptic Q-switchings 1, for accurately controlling opening and off state of each acoustooptic Q-switching 1, make opening and turn-offing of two acoustooptic Q-switching intervals, thereby the repetition rate that realizes Output of laser doubles.
As shown in Figure 3, provided the present invention in another kind of technical scheme.In this embodiment, two acoustooptic Q-switchings 1 are controlled by a synchronizer trigger 7, and two acoustooptic Q-switchings 1 of the accurate control of assurance are opened and off state in the while, realize the in the situation that of high-gain CO
2effective shutoff of oscillating laser, thus high repetition frequency, narrow pulse width Laser output obtained.
Claims (4)
1. dual-acousto-optic is adjusted QCO
2laser, is characterized in that, concave mirror (2), acoustooptic Q-switching (1), laser tube (3), another acoustooptic Q-switching (1) and outgoing mirror (4) are coaxially placed successively; Concave mirror (2) and outgoing mirror (4) form laserresonator; Laser tube (3) is for generation of laser generation; Two acoustooptic Q-switchings (1) insert in laserresonator, adopt Bragg diffraction vertical incidence mode; Two acoustooptic Q-switchings (1) respectively connect a signal generator (5), and signal generator (5) is for accurately controlling the operating state of acoustooptic Q-switching (1); Delay controller (6) connects respectively two acoustooptic Q-switchings (1), for accurately controlling opening and the turn-off time of acoustooptic Q-switching (1), makes two acoustooptic Q-switching intervals open and turn-off, and the repetition that realizes Output of laser doubles.
2. dual-acousto-optic according to claim 1 is adjusted QCO
2laser, is characterized in that, is filled with Xe gas, the CO of ratio 1:3:8:30 in laser tube (3)
2gas, He gas and H
2gas, total gas pressure 30 holders.
3. dual-acousto-optic according to claim 1 is adjusted QCO
2laser, is characterized in that, described outgoing mirror (4) is to CO
2the level crossing that laser part sees through, its material is ZnSe.
4. dual-acousto-optic according to claim 1 is adjusted QCO
2laser, is characterized in that, two acoustooptic Q-switchings (1) are controlled by synchronizer trigger (7), and assurance two acoustooptic Q-switchings of accurate control (1) are opened and off state in the while, realizes high repetition, the output of narrow pulse width laser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310529171.9A CN103594917A (en) | 2013-10-31 | 2013-10-31 | Double-acousto-optic Q-switched CO2 laser device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310529171.9A CN103594917A (en) | 2013-10-31 | 2013-10-31 | Double-acousto-optic Q-switched CO2 laser device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103594917A true CN103594917A (en) | 2014-02-19 |
Family
ID=50084952
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310529171.9A Pending CN103594917A (en) | 2013-10-31 | 2013-10-31 | Double-acousto-optic Q-switched CO2 laser device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103594917A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104051936A (en) * | 2014-06-09 | 2014-09-17 | 中国科学院长春光学精密机械与物理研究所 | Active mode locking CO2 laser |
| CN108832476A (en) * | 2018-06-27 | 2018-11-16 | 武汉市威佳激光有限责任公司 | A kind of multiple channel acousto photoreactivation tune Q light source and Q-regulating method |
| CN108963746A (en) * | 2017-05-24 | 2018-12-07 | 中国科学院理化技术研究所 | Laser using method, pulse width adjustable laser and using method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1197783A (en) * | 1997-09-24 | 1999-04-09 | Mitsubishi Heavy Ind Ltd | Q switched pulse laser driving method |
| JP2005101482A (en) * | 2003-08-26 | 2005-04-14 | Mitsubishi Electric Corp | Laser device and method for driving same |
| JP2007287946A (en) * | 2006-04-18 | 2007-11-01 | Mitsubishi Electric Corp | Q switch laser device and method for adjusting the q switch laser device |
| CN101404381A (en) * | 2008-11-18 | 2009-04-08 | 中国科学院长春光学精密机械与物理研究所 | Code-output acoustooptic modulating Q impulse CO2 laser capable of tuning wavelength |
-
2013
- 2013-10-31 CN CN201310529171.9A patent/CN103594917A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1197783A (en) * | 1997-09-24 | 1999-04-09 | Mitsubishi Heavy Ind Ltd | Q switched pulse laser driving method |
| JP2005101482A (en) * | 2003-08-26 | 2005-04-14 | Mitsubishi Electric Corp | Laser device and method for driving same |
| JP2007287946A (en) * | 2006-04-18 | 2007-11-01 | Mitsubishi Electric Corp | Q switch laser device and method for adjusting the q switch laser device |
| CN101404381A (en) * | 2008-11-18 | 2009-04-08 | 中国科学院长春光学精密机械与物理研究所 | Code-output acoustooptic modulating Q impulse CO2 laser capable of tuning wavelength |
Non-Patent Citations (2)
| Title |
|---|
| DAVID C.THOMPSON ET. AL: "High-speed random access laser tunning", 《APPLIED OPTICS》, vol. 38, no. 12, 20 April 1999 (1999-04-20), pages 2545 - 2552, XP000828568, DOI: doi:10.1364/AO.38.002545 * |
| 谢冀江等: "声光调Q CO2激光器的理论计算和实验研究", 《中国光学学会2010年光学大会论文集》, 23 August 2010 (2010-08-23) * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104051936A (en) * | 2014-06-09 | 2014-09-17 | 中国科学院长春光学精密机械与物理研究所 | Active mode locking CO2 laser |
| CN108963746A (en) * | 2017-05-24 | 2018-12-07 | 中国科学院理化技术研究所 | Laser using method, pulse width adjustable laser and using method thereof |
| CN108832476A (en) * | 2018-06-27 | 2018-11-16 | 武汉市威佳激光有限责任公司 | A kind of multiple channel acousto photoreactivation tune Q light source and Q-regulating method |
| CN108832476B (en) * | 2018-06-27 | 2020-05-19 | 武汉市威佳激光有限责任公司 | Multi-channel acousto-optic composite Q-switched light source and Q-switched method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204103242U (en) | A kind of high power single longitudinal mode ultraviolet all-solid-state laser | |
| Maydan | Fast modulator for extraction of internal laser power | |
| CN104201556A (en) | High-power single-longitudinal-mode ultraviolet all-solid-state laser | |
| CN103594916A (en) | Acousto-optic modulating cavity dumping CO2 laser device | |
| CN103594917A (en) | Double-acousto-optic Q-switched CO2 laser device | |
| WO2008143772A1 (en) | Acousto-optically q-switched co2 laser | |
| CN108832476A (en) | A kind of multiple channel acousto photoreactivation tune Q light source and Q-regulating method | |
| CN104184031A (en) | Structure for lowering linear polarization laser pulse repetition frequency and improving pulse energy | |
| CN104617474A (en) | Resonant cavity for pulse and line selection output of airflow hydrogen fluoride laser | |
| NL2032229A (en) | A-o q-switched solid-state laser device with adjustable pulse output and pulsed laser generation method | |
| CN105896259B (en) | Q-switch Nd:YAG laser pulse width narrows technology | |
| CN103811989A (en) | Optical fiber coupling acousto-optic Q switch for high power pulse fiber laser | |
| CN103166102A (en) | Laser with low-voltage driven electro-optical crystal | |
| CN103500921A (en) | Low-repetition frequency and high-stability subnanosecond pulsed green laser generator | |
| CN104659645A (en) | RTP electrooptical modulating Q airflow hydrogen fluoride laser | |
| CN104051936A (en) | Active mode locking CO2 laser | |
| CN105470793A (en) | Device and method for achieving stable dual-frequency laser output by using etalon and electro-optical crystal | |
| CN104393474A (en) | Narrow-pulse-width laser device | |
| CN105186281B (en) | The control method of a kind of laser instrument output and laser instrument | |
| CN105720470A (en) | Seed-injected single-longitudinal-mode and double-pulse laser and control method | |
| CN103840362B (en) | High recurrent frequency pulse laser device and acousto-optic Q-switching thereof and the driver of this switch | |
| KR101382443B1 (en) | Apparatus for producing pulse laser using q-switching and mode locking | |
| CN113702917A (en) | Coherent pulse radar signal generation method based on sweep frequency photoelectric oscillator | |
| CN205752977U (en) | A kind of two-dimensional acousto-optic Q switch adjusting means | |
| CN203747231U (en) | Fiber coupling acousto-optic Q switch for large-power pulsed optical fiber laser |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140219 |