CN101719624A - Electric-optically Q-switched switch driver - Google Patents
Electric-optically Q-switched switch driver Download PDFInfo
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- CN101719624A CN101719624A CN200910272684A CN200910272684A CN101719624A CN 101719624 A CN101719624 A CN 101719624A CN 200910272684 A CN200910272684 A CN 200910272684A CN 200910272684 A CN200910272684 A CN 200910272684A CN 101719624 A CN101719624 A CN 101719624A
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Abstract
The invention provides an electric-optically Q-switched switch driver, which comprises a DC high voltage source, and is characterized in that: the electric-optically Q-switched switch driver also comprises first and second current limit resistors, first and second switch circuits and a trigger circuit; the DC high voltage source, the first current limit resistor, the first switch circuit and a trigger signal form a voltage-decreased circuit; and the DC high voltage source, the second current limit resistor, the second switch circuit and a trigger signal form another voltage-decreased circuit. When used as a voltage-increased electric-optically Q-switched driver, the electric-optically Q-switched switch driver can chop laser pulses and compress laser pulse width; and when used as two voltage-decreased electric-optically Q-switched drivers, the electric-optically Q-switched switch driver is applied to a dual electric-optically Q-switched laser to double the repetition frequency.
Description
Technical field
The invention belongs to laser application technique, be specifically related to a kind of new type electro Q-switch driving power.
Background technology
Electric-optically Q-switched technology is that a kind of electro optic effect by crystal realizes the Q value mutation, laser energy is compressed in the extremely narrow pulse of width launches, thereby the peak power that laser is exported can improve a kind of technology of several magnitude.The working method of electric-optically Q-switched switch is divided into usually moves back two kinds of pressure type and adding pressure types.Electric-optically Q-switched switch moves back presses the working method principle as follows: when electrooptic crystal the two poles of the earth potential difference was high pressure, the laser resonance cavity loss was very big, and the Q value is very little, can not form laser generation, and no laser output claims electrooptic crystal to close the door; In case the two poles of the earth potential difference vanishing, the interior Q of laserresonator becomes big suddenly, and owing to the inverted population of working-laser material under the state of closing the door accumulates, exports the laser pulse of high-peak power at once, claims that electrooptic crystal opens the door.Electric-optically Q-switched switch pressurized operation mode principle presses the working method principle opposite with moving back, and when electrooptic crystal the two poles of the earth potential difference was zero, electrooptic crystal was closed the door, and when potential difference was high pressure, electrooptic crystal opened the door.Two kinds of working methods are to the requirement difference of laserresonator, and the pressurized operation mode presses working method to compare with moving back, and has increased by a quarter wave plate in the resonant cavity.Traditional move back pressure type and adding pressure type is two kinds of independently working methods, need two kinds of different driving powers, general driving power can only be applied to a kind of working method mostly at present, does not possess compatibility.
Two kinds of working methods of electric-optically Q-switched switch respectively have characteristics, adopt when moving back the electric-optically Q-switched switch of pressure type, do not need quarter wave plate in the laserresonator, and the laser resonance cavity loss is less, and laser threshold is lower.And when adopting the electric-optically Q-switched switch of adding pressure type, having increased quarter wave plate in the laserresonator, the loss of resonator is bigger, but because electrooptic crystal only adds high pressure when opening the door, has prolonged the useful life of electrooptic crystal.Therefore at different requirements, need to select suitable working method, and then need to select the corresponding driving power supply.And the cost of electric-optically Q-switched switch driver accounts for larger proportion in the overall cost of electric-optically Q-switched system, and the driving power of therefore buying or design two different operating modes all can cause the significantly increase of cost.Need change driving power when adopting the different operating mode, also cause inconvenience.
" a kind of have liter, move back the design that compression functions is transferred the Q circuit " designed in (" Chinese water transport " 2008 the 8th the 12nd phases of volume) a kind ofly to have pressurization simultaneously and transfers Q and move back and press the Q switching circuit of transferring two kinds of functions of Q, its essence is for adding volt circuit and a dc high-voltage source realizes moving back volt circuit by one, by the different connections of outside terminal, can realize pressurization respectively and move back two kinds of functions of pressure.But two kinds of functions can only be switched one to one, and promptly the electric-optically Q-switched drive circuit of one road adding pressure type and a tunnel moves back the mutual switching of the electric-optically Q-switched drive circuit of pressure type.
Summary of the invention
The object of the present invention is to provide a kind of electric-optically Q-switched switch driver, this driving power can overcome electric-optically Q-switched pressurization and move back and press two kinds of problems that the working method driving power is incompatible, realizes an electric-optically Q-switched driving power of adding pressure type and two switchings uses of moving back the electric-optically Q-switched driving power of pressure type.
A kind of electric-optically Q-switched switch driver provided by the invention comprises dc high-voltage source, it is characterized in that: it also comprises first, second current-limiting resistance, first, second switching circuit, and circuits for triggering;
The positive voltage output end of dc high-voltage source links to each other with an end of first, second current-limiting resistance respectively, the other end of first, second current-limiting resistance links to each other with the output of first, second switching circuit respectively, the control end of first, second switching circuit links to each other with first, second signal output part of circuits for triggering respectively, the earth terminal of first, second switching circuit links to each other with the negative voltage output of the signal ground of circuits for triggering and dc high-voltage source, constitutes power supply ground; Dc high-voltage source, first current-limiting resistance, first switching circuit and triggering signal constitute one and move back volt circuit, and dc high-voltage source, second current-limiting resistance, second switch circuit and triggering signal constitute another and move back volt circuit.
When the present invention uses as the electric-optically Q-switched driving power of adding pressure type, can carry out copped wave to laser pulse, the compression laser pulse width; Move back the electric-optically Q-switched driving power of pressure type as two and use, be applied to two electro-optical Q-switching lasers, repetition rate can be doubled.Particularly, the present invention has the following advantages:
(1), can realize that an electrooptic crystal pressurized operation mode drive circuit and two electrooptic crystals move back the simple switching of pressing the working method driving power by different external wiring patterns.
When (2) driving an electrooptic crystal pressurized operation mode, can be by the control of the time-delay between the two paths of signals of circuits for triggering lockup, making closes the door when just in time being in laser pulse output, can carry out copped wave to laser pulse, the compression laser pulse width.
(3) drive two electrooptic crystals and move back when pressing working method, its time interval of opening the door can be controlled by delay circuit, can be used in two electro-optical Q-switching lasers.Laser pulse repetition frequency can be doubled.
Description of drawings
Fig. 1 is a basic structure schematic diagram of the present invention.
Fig. 2 is the basic structure schematic diagram of switching circuit among the present invention.
Fig. 3 is the basic structure schematic diagram of circuits for triggering among the present invention.
Fig. 4 is the schematic diagram that the present invention drives an electrooptic crystal pressurized operation mode.
Fig. 5 is that the present invention drives the schematic diagram that two electrooptic crystals move back the pressure working method.
Embodiment
Below by by embodiment the present invention being described in further detail, but following examples only are illustrative, and protection scope of the present invention is not subjected to the restriction of these embodiment.
As shown in Figure 1, electric-optically Q-switched switch driver provided by the invention comprises dc high-voltage source 1, first, second current-limiting resistance 2,5, first, second switching circuit 3,6, and circuits for triggering 4.
The positive voltage output end of dc high-voltage source 1 links to each other with an end of first, second current-limiting resistance 2,5 respectively, the other end of first, second current-limiting resistance 2,5 links to each other with first, second switching circuit 3,6 outputs respectively, the control end of first, second switching circuit 3,6 links to each other with first, second signal output part of circuits for triggering 4 respectively, the earth terminal of first, second switching circuit 3,6 links to each other with the negative voltage output of the signal ground of circuits for triggering 4 and dc high-voltage source 1, constitutes power supply ground.
Dc high-voltage source 1, current-limiting resistance 2, switching circuit 3 have constituted one with triggering signal 4 and have moved back volt circuit; Dc high-voltage source 1, current-limiting resistance 5, switching circuit 6 have constituted another with triggering signal 4 and have moved back volt circuit, and two are moved back volt circuit and have constituted main body of the present invention.Its operation principle is as follows: during the Triggerless input, switching circuit 3 and 6 all turn-offs, and the current potential of node a and b all is a high potential; Circuits for triggering 4 output first triggering signals earlier make switching circuit 3 conductings, then the current potential vanishing of node a; After time-delay after a while, second triggering signal output makes switching circuit 6 conductings, then also vanishing of the current potential of node b.A, B two electrodes of electrooptic crystal 7 are connected respectively to output node a and b, have constituted the driving power of an electrooptic crystal pressurized operation mode; A, B two electrodes of electrooptic crystal 7 are connected respectively to output node a and power supply ground c, and the C of electrooptic crystal 8, D two electrodes are connected respectively to output node b and power supply ground c, have then constituted two electrooptic crystals and have moved back the driving power of pressing working method.
Dc high-voltage source 1 is a high-voltage switch power supply, and its Adjustable Output Voltage is by electrooptic crystal type decided high-voltage value.The model and the resistance of first, second current-limiting resistance 2,5 are identical.
As shown in Figure 2, first, second switching circuit 3,6 is in series by at least two power field effect pipes.This circuit comprises six power field effect pipes, and the withstand voltage of each power field effect pipe is 1kv.The grid of last power field effect pipe is as the control end of switching circuit, and the drain electrode of first power field effect pipe is as the output of switching circuit, and last power field effect pipe source electrode is as the earth terminal of switching circuit.It is fast that first, second switching circuit 3,6 has conducting speed, characteristics such as voltage height, and its conducting speed has determined the speed of opening the door of electrooptic crystal.
As shown in Figure 3, circuits for triggering 4 are made of signal generator 9, delay circuit 12, two 10,13 and two drive circuits 11,14 of shaping circuit, and signal generator 9 produces the identical pulse signal of frequency two-way, and its frequency is that 1Hz-10kHz is adjustable continuously.One the road is directly inputted to shaping circuit 10, and the paired pulses waveform carries out shaping, is undertaken after electric current amplifies by drive circuit 11 again, is connected to the control end of switching circuit 3, realizes the turn-on and turn-off of control switch circuit 3; Another road connects delay circuit 12, produces the pulse signal of time-delay, carries out shaping and drive circuit 14 through 13 pairs of waveforms of shaping circuit and carries out after circuit amplifies, and is connected to the input of switching circuit 6, realizes the turn-on and turn-off of control switch circuit 3.
As shown in Figure 4, it is as follows that the present invention drives an electrooptic crystal pressurized operation mode principle: when the current potential of node a and b all was high potential, the two poles of the earth potential difference of electrooptic crystal 7 was zero, and electrooptic crystal 7 is closed the door; The current potential elder generation vanishing of node a, node b still is a high level, and two interpolar potential differences are high voltage, and then electrooptic crystal 7 opens the door, corresponding adding pressure type electro-optical Q-switching laser output laser pulse; Through after certain time-delay, the also vanishing of b node potential, 7 liang of interpolar potential differences of electrooptic crystal are zero, electrooptic crystal 7 is closed the door.Move back time-delay length between first, second of volt circuit by two of circuits for triggering 4 controls, time delays between may command electrooptic crystal 7 opens the door and closes the door, making closes the door just in time is in the laser pulse output time, can carry out copped wave to laser pulse, the compression laser pulse width.
The present invention drives two electrooptic crystals and moves back and press the working method operation principle as follows as shown in Figure 5: when the current potential of output node a and b is high, two difference in Electrode Potential of electrooptic crystal 7 are high voltage, two difference in Electrode Potential of electrooptic crystal 8 also are high voltage, and two electrooptic crystals are all closed the door; The current potential elder generation vanishing of node a, 7 liang of difference in Electrode Potential vanishing of electrooptic crystal, electrooptic crystal 7 opens the door; After time-delay after a while, the vanishing of b node potential, two difference in Electrode Potential vanishing of electrooptic crystal 8, electrooptic crystal 8 opens the door.Because the accent Q repetition rate and the switching speed of two electrooptic crystals are identical, regulate the time-delay of first, second triggering signal by circuits for triggering, control opening the door blanking time of two electrooptic crystals, select the suitable interval time, can be used in two electric-optically Q-switched lasers laser pulse repetition frequency being doubled.
The structure of circuits for triggering and switching circuit is not limited to the structure in the example, and the above only is preferred embodiment of the present invention, and the present invention should not be confined to the disclosed content of this embodiment and accompanying drawing.So everyly do not break away from the equivalence of finishing under the spirit disclosed in this invention or revise, all fall into the scope of protection of the invention.
Claims (3)
1. an electric-optically Q-switched switch driver comprises dc high-voltage source (1), it is characterized in that: it also comprises first, second current-limiting resistance (2,5), first, second switching circuit (3,6), and circuits for triggering (4);
The positive voltage output end of dc high-voltage source (1) links to each other with an end of first, second current-limiting resistance (2,5) respectively, the other end of first, second current-limiting resistance (2,5) links to each other with the output of first, second switching circuit (3,6) respectively, the control end of first, second switching circuit (3,6) links to each other with first, second signal output part of circuits for triggering (4) respectively, the earth terminal of first, second switching circuit (3,6) links to each other with the negative voltage output of the signal ground of circuits for triggering (4) and dc high-voltage source (1), constitutes power supply ground; Dc high-voltage source (1), first current-limiting resistance (2), first switching circuit (3) constitute one with triggering signal (4) and move back volt circuit, and dc high-voltage source (1), second current-limiting resistance (5), second switch circuit (6) constitute another with triggering signal (4) and move back volt circuit.
2. electric-optically Q-switched switch driver according to claim 1 is characterized in that: first, second switching circuit (3,6) is in series by at least two power field effect pipes.
3. electric-optically Q-switched switch driver according to claim 1, it is characterized in that: circuits for triggering (4) comprise signal generator (9), delay circuit (12), first, second shaping circuit (10,13) and first, second drive circuit (11,14), an output of signal generator (9) is connected with first shaping circuit (10) and first drive circuit (11) successively, and another output of signal generator (9) is connected with delay circuit (12), second shaping circuit (13) and first drive circuit (14) successively.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910272684XA CN101719624B (en) | 2009-11-06 | 2009-11-06 | Electric-optically Q-switched switch driver |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910272684XA CN101719624B (en) | 2009-11-06 | 2009-11-06 | Electric-optically Q-switched switch driver |
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| CN101719624A true CN101719624A (en) | 2010-06-02 |
| CN101719624B CN101719624B (en) | 2011-02-09 |
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| CN200910272684XA Expired - Fee Related CN101719624B (en) | 2009-11-06 | 2009-11-06 | Electric-optically Q-switched switch driver |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103592783A (en) * | 2013-11-25 | 2014-02-19 | 核工业理化工程研究院 | Laser time domain modulator based on electric light switch in photophoresis experimental research |
| CN103973285A (en) * | 2014-05-27 | 2014-08-06 | 唐名姣 | Optically-controlled optical shutter and integrated circuit thereof |
| CN108233164A (en) * | 2018-02-10 | 2018-06-29 | 中国医学科学院生物医学工程研究所 | A kind of novel erbium laser |
| CN108963746A (en) * | 2017-05-24 | 2018-12-07 | 中国科学院理化技术研究所 | The application method of laser, the laser of adjustable pulse width and its application method |
| CN117294294A (en) * | 2023-11-22 | 2023-12-26 | 深圳市弗镭斯激光技术有限公司 | Electro-optical Q switch driving circuit based on gallium nitride MOS tube |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86203753U (en) * | 1986-06-11 | 1987-07-15 | 北京光电技术研究所 | Voltage-relieving equalizing q regulating unit |
| US5343483A (en) * | 1993-03-19 | 1994-08-30 | Wisconsin Alumni Research Foundation | High voltage fast pulse control for a Q-switched laser |
| CN2456340Y (en) * | 2000-12-29 | 2001-10-24 | 中国科学院安徽光学精密机械研究所 | Voltage regulating power supply for laser regulating Q value |
| JP2003347636A (en) * | 2002-05-22 | 2003-12-05 | Nec Corp | Q-switched laser apparatus and method for controlling q-switching |
-
2009
- 2009-11-06 CN CN200910272684XA patent/CN101719624B/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103592783A (en) * | 2013-11-25 | 2014-02-19 | 核工业理化工程研究院 | Laser time domain modulator based on electric light switch in photophoresis experimental research |
| CN103592783B (en) * | 2013-11-25 | 2016-04-20 | 核工业理化工程研究院 | Based on the laser temporal modulator of electric light photoswitch in photophoresis experimental study |
| CN103973285A (en) * | 2014-05-27 | 2014-08-06 | 唐名姣 | Optically-controlled optical shutter and integrated circuit thereof |
| CN108963746A (en) * | 2017-05-24 | 2018-12-07 | 中国科学院理化技术研究所 | The application method of laser, the laser of adjustable pulse width and its application method |
| CN108963746B (en) * | 2017-05-24 | 2020-06-26 | 中国科学院理化技术研究所 | Laser using method, pulse width adjustable laser and using method thereof |
| CN108233164A (en) * | 2018-02-10 | 2018-06-29 | 中国医学科学院生物医学工程研究所 | A kind of novel erbium laser |
| CN117294294A (en) * | 2023-11-22 | 2023-12-26 | 深圳市弗镭斯激光技术有限公司 | Electro-optical Q switch driving circuit based on gallium nitride MOS tube |
| CN117294294B (en) * | 2023-11-22 | 2024-03-19 | 深圳市弗镭斯激光技术有限公司 | Electro-optical Q switch driving circuit based on gallium nitride MOS tube |
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| CN101719624B (en) | 2011-02-09 |
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