CN102694340A - Battery transverse excitation atmosphere CO2 laser - Google Patents
Battery transverse excitation atmosphere CO2 laser Download PDFInfo
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- CN102694340A CN102694340A CN2011100730655A CN201110073065A CN102694340A CN 102694340 A CN102694340 A CN 102694340A CN 2011100730655 A CN2011100730655 A CN 2011100730655A CN 201110073065 A CN201110073065 A CN 201110073065A CN 102694340 A CN102694340 A CN 102694340A
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Abstract
The invention discloses a battery transverse excitation atmosphere CO2 laser and relates to a CO2 laser technology. Four common dry cells which are connected in series provide power for the laser and the laser can stably run as a highest 5Hz repetition frequency mode. A whole system is formed by a control excitation unit and a laser head unit. The control excitation unit comprises a battery module, an inversion module, a boost module, a rectification module, an energy storage module, a high voltage trigger module and the like. The laser head comprises a seal chamber, an optical resonant cavity and a preionization and main discharging electrode. An apparatus of the invention is characterized by: using a built-in battery mode. Through using a switch power supply technology, stable output of a laser pulse in a compact space can be realized, which is convenient for carrying in the field. The laser is suitable for various kinds of platform to carry and has a good application prospect in laser target designation.
Description
Technical field
The present invention relates to laser technology, particularly a kind of transverse excitation atmosphere CO that realizes battery-powered steady running
2Laser device.
Background technology
1970, people such as Beaulieu reported even excitation and pulse transverse excitation atmosphere CO that can under atmospheric pressure realize the stable glow discharge of controlling oneself first
2Laser.This type laser adopts high voltage narrow pulse excitation (width of discharge pulse is generally several microseconds), can obtain very high pulse peak power.The output pulse energy is the transverse excitation atmosphere CO of joule magnitude
2Laser, the pulse peak power of its output can reach tens megawatts, is CW CO
2Laser is incomparable.
Comprehensive present Research both at home and abroad (referring to: 1, " Sun Yu; Qu Yanchen, Zhao Weijiang etc. the experimental study [J] of miniaturization high energy output TEA CO2 laser. laser and infrared, 2007; 37 (9): 835-336 "; 2, " Katsumi Midorikawa, Hidekazu Hatanaka, S Minoru Obarat:Hideo Tashirot A 1kHz repetition-rate 500W CO
2TEA laser employing solid-state pulse power conditioning Meas.Sci.Technoi.1993,4:388-391. ") form transverse excitation atmosphere CO usually
2Mostly each unit of Optical Maser System is separate structure such as laser head unit, power supply exciting unit and control unit.The laser optical electric flux transforms required electric energy and is provided through external power supply by cable.Each unit is separate, and system configuration is complicated, has limited the application in the open air of such Optical Maser System.
Summary of the invention
The objective of the invention is to disclose a kind of battery pack transverse excitation atmosphere CO
2Laser in the space of a compactness, is realized transverse excitation atmosphere CO
2The stable output of the laser pulse of laser with its cramped construction of powering mode and 200mm * 200mm * 380mm independently, is convenient to open-air use.
For realizing above-mentioned purpose, technical solution of the present invention is:
A kind of battery pack transverse excitation atmosphere CO
2Laser adopts built-in general dry battery powered switch power technology, and for laser output provides required pump energy, system is with the repetition rate mode steady running of the highest 5Hz; It comprises control exciting unit and laser head unit; Wherein, the control exciting unit comprise battery pack, inversion, boost, high-voltage rectifying, high-voltage energy storage, high pressure trigger module; The laser head unit comprises seal chamber, optical resonator, preionization and main discharge electrode;
After Laser Power Devices were opened, the laser storage capacitor was charged to setting voltage rapidly; Control circuit triggers high-voltage switch gear conducting moment, and the preionization capacitive sensing goes out high pressure, because gap≤0.1mm, at first discharge generation UV corona between negative electrode and the preionization; Under the effect of UV corona preionization, electronics increases sharply between main electrode, between main electrode, forms uniform gas glow discharge exciting field, the laser pulse output of in resonant cavity, vibrating.
Described battery pack transverse excitation atmosphere CO
2Laser; Its said control exciting unit, during use, four joint 1.5V dry cells provide excitation required electric energy as DC power supply; The BOOST circuit of forming through the MAX1771 chip boosts to direct current 12V; The BOOST circuit of forming through the MAX1771 chip again rises to direct current 12V supply power voltage about direct current 150V, as the charging voltage that triggers primary electric capacity; Adopt the NE555 chip to form oscillating circuit, drive FET IRF540, direct current 12V voltage is modulated to high-frequency alternating current through inversion; Boosting to behind the setting voltage rectifying and wave-filtering by high frequency transformer again obtains high direct voltage and charges into storage capacitor; High-voltage switch gear is once triggering, and the rapid injecting electrode of energy forms even discharge field.
Described battery pack transverse excitation atmosphere CO
2Laser, its said optical resonator, UV corona preionization and main electrode sealing are integrated in the metallic cavity, constitute laser head.
Described battery pack transverse excitation atmosphere CO
2Laser, its said optical resonator are the parallel speculum in two sides, and wherein outgoing mirror is a partially reflecting mirror, and its reflectivity does not coexist between 30% to 90% according to the gain of laser working medium, and its face type is plane or sphere according to the resonant cavity type; As the speculum of Effect of Back-Cavity Mirror, for the oxygen-free copper substrate processes through ultra finish-milling or ultra finish turning, surface gold-plating film or deielectric-coating are protected, and its face type is plane or sphere according to the resonant cavity type.
Described battery pack transverse excitation atmosphere CO
2Laser, its said outgoing mirror, its material is CO
2Infrared laser wave band window material zinc selenide, germanium and GaAs one of them; At tunable wave length CO
2In the laser, said Effect of Back-Cavity Mirror is a balzed grating.
Described battery pack transverse excitation atmosphere CO
2Laser, its said laser working medium is CO
2, N
2, He one of them or they gaseous mixture.
Described battery pack transverse excitation atmosphere CO
2Laser, its said UV corona preionization is axial tubular preionization, and its tube wall is the thick quartzy material of 0.8mm-1.2mm, and the quartz ampoule internal diameter is 3mm-5mm, inwall plating 0.05mm-0.15mm metallic diaphragm, the quartz ampoule outer wall is close to the main electrode negative electrode.
Described battery pack transverse excitation atmosphere CO
2Laser, its said main electrode comprises anode and negative electrode, and anode and negative electrode are alloy aluminum matter electrode, and the electrode discharge district is a plane, adopts arc surface to seamlessly transit with the side, and anode and cathode electrode spacing are adjustable from 8mm to 15mm according to the gain volume.
Described battery pack transverse excitation atmosphere CO
2Laser, its said control circuit triggers the high-voltage switch gear conducting, is that the low level triggering signal boosts to 20kV through circuits for triggering; Trigger the high-voltage switch gear conducting; When high-voltage switch gear is triggered conducting moment, the preionization capacitive sensing goes out high pressure, discharge generation UV corona between negative electrode and preionization.
In sum, the present invention adopts the mode of built-in type direct current power supply power supply, realizes transverse excitation atmosphere CO
2The stable output of the laser pulse of laser is easy to carry with its compact structure and regular profile, is fit to open-air the use.
Description of drawings
Fig. 1 is battery pack transverse excitation atmosphere CO
2Laser main circuit schematic diagram, wherein, Fig. 1 a is 5V to a 12V DC voltage booster circuit, and Fig. 1 b is 12V to a 150V DC voltage booster circuit, and Fig. 1 c is 12V to a 20kV DC voltage booster circuit, and Fig. 1 d is that 5V is battery-powered, transverse excitation atmosphere CO
2The system of laser circuit connects block diagram.
Fig. 2 is battery pack transverse excitation atmosphere CO
2The laser head structure sketch map.
Fig. 3 is battery pack transverse excitation atmosphere CO
2The Optical Maser System structural representation.
Fig. 4 is battery pack transverse excitation atmosphere CO
2Laser is under different cavity internal gas pressure condition, and the output energy is corresponding to the relation curve of discharge voltage.
Embodiment
For further specifying characteristic of the present invention and structure, the present invention is described in detail below in conjunction with accompanying drawing.Fig. 2 is battery pack transverse excitation atmosphere CO of the present invention
2Laser head cellular construction sketch map.Wherein, Fig. 2 a is a cutaway view, and Fig. 2 b is a stereogram.
The seal chamber of laser head unit is made up of aluminium matter drum 1, cavity end plate 2 and needle-valve 3.Anode 4, negative electrode 6 constitute laser head discharge gain unit with ultraviolet preionization device 8.5,7,9 be respectively anode and negative electrode the support that is connected.10 is the incoming end of high direct voltage.Optical resonator is made up of the high precision two-dimensional scalable microscope base 11 and 13 that total reflective mirror 12 and outgoing mirror 14 adapt with it.
Fig. 3 is battery pack transverse excitation atmosphere CO
2The Optical Maser System structural representation.15 is the laser head unit, and 16,17 is front and back panel, and wherein front panel 16 is an operation control panel, distributed above apparent control liquid crystal display screen 18 and control button, and form control units with power board 20.Battery pack 19, power board 20, high frequency transformer 21, rectifying and wave-filtering plate 22, storage capacitor 23 and high-voltage switch gear 24 are formed the power supply exciting unit.
Embodiment
1, the design of laser head:
Battery pack transverse excitation atmosphere CO
2The structure of laser head is as shown in Figure 2.Laser head main discharge electrode, ultraviolet pre-ionization electrode etc. are installed in the airtight cavity.The cavity of laser head is processed for the one-shot forming aluminum pipe, and two ends adopt square aluminum end plate to combine silicon rubber loop to realize sealing.Utilize the material of alloy aluminum as laser cavity; Can obtain higher mechanical strength on the one hand; Also can effectively shield the intense electromagnetic radiation that high-pressure discharge produces on the other hand, with measurement that guarantees laser and the influence that control system does not receive electromagnetic interference.For further improving the inner vacuum degree of laser cavity, the laser cavity inwall adopts polishing, to reduce assorted gas rate.Main discharge electrode adopts improved Zhang Shi electrode, and electrode material is an alloy aluminum, and effectively discharge volume is 200mm * 5mm * 5mm.Corona ultraviolet preionization mode is adopted in the preionization source of laser, and two groups of preionization sources are placed on the both sides of main discharge negative electrode respectively.
Laser adopts the compact structure design, and insulation distance is limited in the chamber.Consider the requirement of High-Voltage Insulation; When the 20kV high direct voltage inserts electrode, adopt the processing mode of the buried high-voltage connection of nylon insulation loop bar, in seal chamber; Dexterously with high-voltage safety iontophoresis electrode reliably; Simultaneously the hardware of the high-voltage tip discharging that possibly cause in the chamber is all done Passivation Treatment, cover the thick polyester insulated film of 0.5mm, to improve the dielectric strength in inside cavity space in inside cavity.
Laserresonator is a flat-concave cavity, constitutes a stable resonator by the radius of curvature total reflective mirror that is 4m and the flat output mirror of part transmission.The gain of considering the laser output in the chamber is lower, and outgoing mirror adopts double-sided coating technology, the inboard plating in chamber be 60% rete to 10.6 microns reflectivity of centre wavelength, outside plating is 10.6 microns anti-reflection film to centre wavelength.
2, the design of Optical Maser System:
Optical Maser System is made up of several parts such as laser head, control unit, power supply exciting units.Overall dimensions are 200mm * 200mm * 380mm.Through the BOOST circuit that the MAX1771 chip is formed, (4 joint series connection 5V) boost to direct current 12V, shown in Fig. 1 a with charged battery voltage.The BOOST circuit that adopts the MAX1771 chip to form rises to direct current 12V supply power voltage about direct current 150V, as the charging voltage that triggers primary electric capacity, shown in Fig. 1 b.Adopt the NE555 chip to form oscillating circuit, drive FET IRF540, direct current 12V voltage is risen to direct current 20kV through high-tension transformer and voltage doubling rectifing circuit, as charging voltage, shown in Fig. 1 c.The system of laser circuit connects block diagram shown in Fig. 1 d, and the 5V voltage by battery pack provides rises to 12V through the 5V-12V DC voltage booster circuit.Wherein, one road 12V direct voltage is connected to the 12V-150V booster circuit, as electric capacity charging voltage in the circuits for triggering.When triggering signal was imported, electric capacity drove the high voltage pulse that triggers about transformer generation amplitude 20kV through FET IRF840 discharge, triggers the high-voltage switch gear conducting.Another road 12V direct voltage is connected to the 12V-20kV booster circuit, is connected into 4nF storage capacitor one end after boosting to 20kV, and it is charged, and the storage capacitor other end inserts the negative electrode of main electrode, and anode is ground connection then.When high-voltage switch gear is triggered conducting moment, the 20kV high pressure on the storage capacitor that is attached thereto is carried between anodic-cathodic.Preionization electric capacity moment induces high pressure, because gap≤0.1mm, at first discharge generation UV corona between negative electrode and the preionization.Under the effect of UV corona preionization, electronics increases sharply between main electrode, between main electrode, forms uniform gas glow discharge exciting field, the laser pulse output of in resonant cavity, vibrating.
In the experiment, choosing storage capacitor is C=4nF, and the mixed proportion of laser working gas is chosen to be CO
2: N
2: He=1: 1: 4, operating air pressure 1 * 10
5Pa under the condition of discharge voltage 20kV, adopts the molectron-100 energy meter that laser output pulse energy is measured.Under the condition of pulse repetition frequency 1Hz, obtain the output laser pulse energy and be about 35mJ.Regulate supply voltage, the chamber internal gas pressure obtains under the different cavity internal gas pressure condition, and the output energy is corresponding to the relation curve of discharge voltage, and is as shown in Figure 4.Along with the increase of injecting energy, laser pulse output energy is the linear trend that increases basically.Between 18kV-22kV, laser pulse output energy is very fast increasing along with the increase of driving voltage.In the time of between 22kV-24kV, removing air pressure is following time of 100kPa condition, and outside laser pulse output energy still comparatively fast increased, the energy output increase under 80kPa and the 90kPa condition was the situation that eases up.Under the 100kPa condition, when driving voltage was 24kPa, the maximum output energy of laser pulse was 50mJ.The highest frequency of the stable output of laser is 5Hz.
The present invention adopts the design of built-in dry cell batteries direct current supply, and low-voltage dc power supply is rectified into high direct voltage after through inversion boosting, and storage capacitor in the pulse forming unit is charged to setting voltage rapidly.The low level triggering signal boosts to 20kV through circuits for triggering, triggers the high-voltage switch gear conducting, and when high-voltage switch gear is triggered conducting moment, the preionization capacitive sensing goes out high pressure, because gap≤0.1mm, at first discharge generation UV corona between negative electrode and the preionization.Under the effect of UV corona preionization, electronics increases sharply between main electrode, between main electrode, forms uniform gas glow discharge exciting field, the laser pulse output of in resonant cavity, vibrating.
Claims (9)
1. battery pack transverse excitation atmosphere CO
2Laser adopts built-in general dry battery powered switch power technology, and for laser output provides required pump energy, system is with the repetition rate mode steady running of the highest 5Hz; It is characterized in that, comprise control exciting unit and laser head unit; Wherein, the control exciting unit comprise battery pack, inversion, boost, high-voltage rectifying, high-voltage energy storage, high pressure trigger module; The laser head unit comprises seal chamber, optical resonator, preionization and main discharge electrode;
After Laser Power Devices were opened, the laser storage capacitor was charged to setting voltage rapidly; Control circuit triggers high-voltage switch gear conducting moment, and the preionization capacitive sensing goes out high pressure, because gap≤0.1mm, at first discharge generation UV corona between negative electrode and the preionization; Under the effect of UV corona preionization, electronics increases sharply between main electrode, between main electrode, forms uniform gas glow discharge exciting field, the laser pulse output of in resonant cavity, vibrating.
2. battery pack transverse excitation atmosphere CO as claimed in claim 1
2Laser is characterized in that, said control exciting unit; During use; Four joint 1.5V dry cells provide excitation required electric energy as DC power supply, and the BOOST circuit of forming through the MAX1771 chip boosts to direct current 12V, the BOOST circuit of forming through the MAX1771 chip again; Direct current 12V supply power voltage is risen to about direct current 150V, as the charging voltage that triggers primary electric capacity; Adopt the NE555 chip to form oscillating circuit, drive FET IRF540, direct current 12V voltage is modulated to high-frequency alternating current through inversion; Boosting to behind the setting voltage rectifying and wave-filtering by high frequency transformer again obtains high direct voltage and charges into storage capacitor; High-voltage switch gear is once triggering, and the rapid injecting electrode of energy forms even discharge field.
3. battery pack transverse excitation atmosphere CO as claimed in claim 1
2Laser is characterized in that, said optical resonator, UV corona preionization and main electrode sealing are integrated in the metallic cavity, constitute laser head.
4. battery pack transverse excitation atmosphere CO as claimed in claim 1
2Laser is characterized in that, said optical resonator is the parallel speculum in two sides, and wherein outgoing mirror is a partially reflecting mirror, and its reflectivity does not coexist between 30% to 90% according to the gain of laser working medium, and its face type is plane or sphere according to the resonant cavity type; As the speculum of Effect of Back-Cavity Mirror, for the oxygen-free copper substrate processes through ultra finish-milling or ultra finish turning, surface gold-plating film or deielectric-coating are protected, and its face type is plane or sphere according to the resonant cavity type.
5. battery pack transverse excitation atmosphere CO as claimed in claim 4
2Laser is characterized in that, said outgoing mirror, and its material is CO
2Infrared laser wave band window material zinc selenide, germanium and GaAs one of them; At tunable wave length CO
2In the laser, said Effect of Back-Cavity Mirror is a balzed grating.
6. battery pack transverse excitation atmosphere CO as claimed in claim 4
2Laser is characterized in that, said laser working medium is CO
2, N
2, He one of them or they gaseous mixture.
7. battery pack transverse excitation atmosphere CO as claimed in claim 1
2Laser is characterized in that, said UV corona preionization is axial tubular preionization, and its tube wall is the thick quartzy material of 0.8mm-1.2mm, and the quartz ampoule internal diameter is 3mm-5mm, inwall plating 0.05mm-0.15mm metallic diaphragm, and the quartz ampoule outer wall is close to the main electrode negative electrode.
8. battery pack transverse excitation atmosphere CO as claimed in claim 1
2Laser is characterized in that, said main electrode comprises anode and negative electrode, and anode and negative electrode are alloy aluminum matter electrode, and the electrode discharge district is a plane, adopts arc surface to seamlessly transit with the side, and anode and cathode electrode spacing are adjustable from 8mm to 15mm according to the gain volume.
9. battery pack transverse excitation atmosphere CO as claimed in claim 1
2Laser; It is characterized in that said control circuit triggers the high-voltage switch gear conducting, is that the low level triggering signal boosts to 20kV through circuits for triggering; Trigger the high-voltage switch gear conducting; When high-voltage switch gear is triggered conducting moment, the preionization capacitive sensing goes out high pressure, discharge generation UV corona between negative electrode and preionization.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100730655A CN102694340A (en) | 2011-03-25 | 2011-03-25 | Battery transverse excitation atmosphere CO2 laser |
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|---|---|---|---|
| CN2011100730655A CN102694340A (en) | 2011-03-25 | 2011-03-25 | Battery transverse excitation atmosphere CO2 laser |
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| CN102694340A true CN102694340A (en) | 2012-09-26 |
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| CN2011100730655A Pending CN102694340A (en) | 2011-03-25 | 2011-03-25 | Battery transverse excitation atmosphere CO2 laser |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109870896A (en) * | 2019-03-26 | 2019-06-11 | 王飞 | A kind of aura timer |
| CN111148334A (en) * | 2019-12-31 | 2020-05-12 | 河海大学常州校区 | Portable dry cell power supply DC corona sterilizing pen |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1797875A (en) * | 2004-12-23 | 2006-07-05 | 中国科学院电子学研究所 | Pump arrangement in long pulse for transverse energized carbon-dioxide laser |
-
2011
- 2011-03-25 CN CN2011100730655A patent/CN102694340A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1797875A (en) * | 2004-12-23 | 2006-07-05 | 中国科学院电子学研究所 | Pump arrangement in long pulse for transverse energized carbon-dioxide laser |
Non-Patent Citations (1)
| Title |
|---|
| 郑义军，等: "新型便携式TEA CO2激光器", 《激光与红外》, vol. 39, no. 8, 31 August 2009 (2009-08-31) * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109870896A (en) * | 2019-03-26 | 2019-06-11 | 王飞 | A kind of aura timer |
| CN111148334A (en) * | 2019-12-31 | 2020-05-12 | 河海大学常州校区 | Portable dry cell power supply DC corona sterilizing pen |
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Application publication date: 20120926 |