CN201075571Y - Double impulse width output laser - Google Patents
Double impulse width output laser Download PDFInfo
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- CN201075571Y CN201075571Y CNU2007200732128U CN200720073212U CN201075571Y CN 201075571 Y CN201075571 Y CN 201075571Y CN U2007200732128 U CNU2007200732128 U CN U2007200732128U CN 200720073212 U CN200720073212 U CN 200720073212U CN 201075571 Y CN201075571 Y CN 201075571Y
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Abstract
The utility model discloses a duel pulse width output laser, consisting of a Gaussian reflector, a condenser cavity, a xenon lamp, a laser crystal, a polaroid, a Lambada/4 retardation sheet, a pockels box, a holophote and a pulse driving circuit. The pockels box is fixedly arranged in a laser generating optical path; the pulse driving circuit comprises a long pulse driving circuit and a narrow pulse driving circuit; one end of the two driving circuits is electrically connected with one end of the pockels box and the other end is electrically connected with the other end of the pockels box through a changeover switch. The laser adopts the changeover switch to connect different driving circuits to shift the laser generator among different output modes, which not only simplifies structure, ensures the volume thereof to be similar to that of a laser in single working mode, but also fixes a q-switched optical component to the a laser generating optical path and avoids defects such as deviation, instability, etc. caused by the movement of optical component; therefore, pulse laser of different pulse width can be obtained conveniently by controlling different changeover switches to choose different driving circuits during operation.
Description
Technical field
The utility model relates to a kind of laser equipment, relates in particular to a kind of pair of pulsewidth output laser.
Background technology
At present, laser is extensive use of medically having obtained as therapeutic equipments, and short pulse width transfers Q YAG laser obtaining good effect aspect removing beverage, the beauty treatment.Long pulse width YAG laser has also obtained approval in the curative effect aspect tender skin, depilation, the treatment vascular lesions.
Usually, short pulse width YAG laser utilizes electric-optically Q-switched technology to realize the laser output of short pulse duration, high-peak power, and long pulse width YAG laser is because of using Q-regulating technique, and exporting then is the wide pulse laser of long pulse.The output that will realize these two kinds of laser work patterns simultaneously generally needs two laser equipments; Perhaps in same laser equipment, add movement mechanisms, will carry out electric-optically Q-switched parts (as pockels box and wave plate) shift-in as required or shift out laser generation light path, thereby reach the purpose of switching two kinds of laser work patterns.But the shortcoming of above-mentioned two kinds of methods for designing also is conspicuous: though adopt two laser equipment simple possible waste device resources; And the mode of the general mobile electric-optically Q-switched parts that adopt, its shortcoming is that electric-optically Q-switched piece volumes is bigger, must reserve a bigger space if move electric-optically Q-switched parts, and mobile device must possess and have high-precision positioning function could guarantee stably to work, and will make become complex structure, volume of a whole set of laser equipment bigger than normal like this; And electric-optically Q-switched parts are optics critical components of generating device of laser, and it is a precision element, and it is relatively more responsive to angle at work, often moves and then causes angular deviation easily, thereby influence the operating efficiency of laser.
Summary of the invention
The purpose of this utility model is to overcome the deficiency that existing unit laser exists, provide a kind of simple in structure, two pulsewidth output lasers of working stability, its output long pulse width YAG laser and short pulse width are transferred Q YAG laser, wherein the output pulse width of long pulse width YAG laser is more than 50 μ s, and short pulse width transfers the output pulse width scope of Q YAG laser between 5～100ns.
In order to solve the problems of the technologies described above, of the present utility model pair of pulsewidth output laser, comprise Gauss's outgoing mirror, laser pump cavity, xenon lamp, laser crystal, polarizer, λ/4 wave plates, pockels box, completely reflecting mirror and pulse driving circuit, described pockels box is fixedly set in the laser generation light path; Described pulse driving circuit comprises long pulse drive circuit and burst pulse drive circuit, and an end of two drive circuits is electrically connected with an end of pockels box, and the other end of two drive circuits is electrically connected by the other end of diverter switch with the pockels box.
The output of described long pulse drive circuit and burst pulse drive circuit links together and is electrically connected with an end of pockels box, the input of two drive circuits switches end points and is electrically connected with two of diverter switch respectively, and the stiff end of diverter switch is electrically connected with the other end of pockels box.
Under the narrow-pulse laser pattern, system sends instruction, and drive circuit is switched to the burst pulse drive circuit, adds moment λ/4 wave voltage pulses to the Pockels box, laser system is operated in transfers the Q pattern. and output pulse width is the short-pulse laser of 5～100ns.
Under the Long Pulse LASER pattern, system sends instruction, and drive circuit is switched to the long pulse drive circuit, add lasting λ/2 voltages to the Pockels box, make laser system be operated in the low-loss pattern, thereby laser produces free oscillation, output pulse width is the above Long Pulse LASERs of 50 μ s.
Of the present utility model pair of pulsewidth output laser reaches two pulsewidth outputs by optimizing circuit and structural design under the prerequisite that does not change the unit volume substantially, adopting the different drive circuit of diverter switch connection to control laser generator switches between different output services patterns, both simplified the structure, made its volume close like this, again because of having adopted pulse voltage that the pockels box is applied distinct pulse widths, varying strength mode with the laser output that reaches distinct pulse widths with the laser of single mode of operation.Its unit realizes that double working modes is to transfer the Q optic stationary to realize under the prerequisite of laser generation light path, defectives such as deviation, decrease in efficiency and job insecurity have also just been avoided because of the mobile optical parts cause, in the practical operation, as long as regulate diverter switch as required, select different pulse driving circuits just can obtain the pulse laser of distinct pulse widths easily.
Description of drawings
Fig. 1 is the structural representation of the two pulsewidth output lasers of the utility model.
Pulse voltage cycle variation schematic diagram on pockels box when Fig. 2 is the utility model output short pulse duration accent Q YAG laser.
When being the wide YAG laser of the utility model output long pulse, Fig. 3 adds the constant voltage schematic diagram on the pockels box.
When Fig. 4 is the wide YAG laser of the utility model output long pulse on the pockels box pulse voltage cycle change schematic diagram.
Among the figure: 1. Gauss's outgoing mirror 2. laser pump cavities 3. polarizers 4. λ/4 wave plates
5.pockels box 6. completely reflecting mirrors 7. burst pulse drive circuits
8. long pulse drive circuit 9. diverter switches 10. xenon lamps
11. laser crystal
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is described further:
Show of the present utility model pair of pulsewidth output laser as Fig. 1, comprise Gauss's outgoing mirror 1, laser pump cavity 2, polarizer 3, λ/4 wave plates 4, pockels box 5, completely reflecting mirror 6, burst pulse drive circuit 7, long pulse drive circuit 8, diverter switch 9, xenon lamp 10, laser crystal 11; Described pockels box 5 is fixedly set in the laser generation light path, one end of pockels box 5 is electrically connected with the fixing point of diverter switch 9, two switching points of diverter switch 9 are electrically connected with an end of burst pulse drive circuit 7 and long pulse drive circuit 8 respectively, and the other end of two drive circuits is electrically connected with the other end of pockels box 5 after linking together by lead again.
During use, as the pulse duration of need switched laser output, only need to regulate diverter switch 9, the pulse driving circuit of switch connection distinct pulse widths, will apply the pulse voltage of distinct pulse widths at the two ends of pockels box 5, thus the pulse laser of control laser output distinct pulse widths.
Pulse voltage cycle variation schematic diagram on pockels box when Fig. 2 is the utility model output short pulse duration accent Q YAG laser.The YAG crystal is launched natural daylight under the optical pumping of xenon lamp 10, behind polarizer 3, light beam becomes along the linearly polarized light of x direction, if making alive not on the pockels box 5, by pockels box 5, its polarization state does not change linearly polarized light along optical axis, behind completely reflecting mirror 6, unconverted once more electric-optically Q-switched switch is in " opening " state by pockels box 5 and polarizer 3, and laser is in high Q state of value; If add λ/4 voltages on the pockels box 5, because bubble Ke Ersi effect, after the linearly polarized light along the x direction passes through pockels box 5, reflect through completely reflecting mirror 6, pass through pockels box 5 once more, the direction of vibration of linearly polarized light changes pi/2, and linearly polarized light can not pass through polarizer 3 again, electric-optically Q-switched switch is in " cutting out " state, and laser is in the low reactance-resistance ratio state.As shown in Figure 2, when xenon lamp 10 has just begun optical pumping, system's control its switch 9 is selected burst pulse drive circuit 7, it highly is the voltage of λ/4 that burst pulse drive circuit 7 produces on pockels box 5, light beam can not pass through in resonant cavity, this moment, laser was in the low reactance-resistance ratio state, because the continuation incentive action of optical pumping, last energy level population just increases sharply; After after a while, when treating that the upper laser level population runs up to maximum, the voltage of burst pulse drive circuit 7 on pockels box 5 removes suddenly, and laser moment is in high Q state of value, produce avalanche type laser generation, transfer Q YAG laser thereby produce short pulse duration.The pulse voltage width that burst pulse drive circuit 7 produces on pockels box 5 is very narrow, be to finish the whole process of electric-optically Q-switched switch from " closing " to " opening " moment, the duration of action is shorter than the life-span of photon in the chamber, so can make laser pulse power reach high.What burst pulse drive circuit 7 added λ/4 voltages on the pockels box is periodic, and it is long that produce an adjustable Q laser pulse than laser cycle time.
When being the wide YAG laser of the utility model output long pulse, Fig. 3 adds the constant voltage schematic diagram on the pockels box.When xenon lamp 10 has just begun pumping, system's control its switch 9 is selected long pulse drive circuit 8, it highly is the constant voltage of λ/4 that long pulse drive circuit 8 produces on the pockels box, light beam can not pass through polarizer 3 again, this moment, laser was in the low reactance-resistance ratio state, because dynamic excitation is used energy level population and is being increased sharply, form free oscillation, produce the wide YAG laser of long pulse.The peak power ratio short pulse duration accent Q YAG's of the wide YAG laser of long pulse is low.Though can produce the wide YAG laser of long pulse to adding a constant lambda/4 voltages on the pockels box 5 by long pulse drive circuit 8, but because in whole laser production process, keep λ/4 voltages on the pockels box 5 always, this will shorten the useful life of pockels box 5, what therefore, introduce among Fig. 4 is to adopt another to produce the method for the wide YAG laser of long pulse.
When Fig. 4 is the wide YAG laser of the utility model output long pulse on the pockels box pulse voltage cycle change schematic diagram.Though the method shown in Fig. 3 can produce long pulse width YAG laser, can shorten the useful life of pockels box 5.To introduce a kind of improving one's methods below: when xenon lamp just begins optical pumping, system's control its switch 9 is selected long pulse drive circuit 8, it highly is the voltage of λ/4 that long pulse drive circuit 8 produces on the pockels box, light beam can not pass through polarizer 3 again, this moment, laser was in the low reactance-resistance ratio state, though because dynamic excitation is used energy level population and increased sharply, this moment, optical loss was big, vibration is also just set up, and forms the wide YAG laser pulse of long pulse one time.Then, long pulse drive circuit 8 institute's making alive on pockels box 5 becomes 0, the moment that optical pumping next time by the time begins, repeat above-mentioned steps again, and give the pockels box 5 pressurizations.So the voltage on the pockels box will be the one-period pulse at this moment.Effectively prolonged the useful life of pockels box 5.
Claims (2)
1. two pulsewidth output laser, comprise Gauss's outgoing mirror, laser pump cavity, xenon lamp, laser crystal, polarizer, λ/4 wave plates, pockels box, completely reflecting mirror and pulse driving circuit, it is characterized in that: described pockels box is fixedly set in the laser generation light path; Described pulse driving circuit comprises long pulse drive circuit and burst pulse drive circuit, and an end of two drive circuits is electrically connected with an end of pockels box, and the other end of two drive circuits is electrically connected by the other end of diverter switch with the pockels box.
2. according to claim 1 pair of pulsewidth output laser, it is characterized in that: the output of described long pulse drive circuit and burst pulse drive circuit links together and is electrically connected with an end of pockels box, the input of two drive circuits switches end points and is electrically connected with two of diverter switch respectively, and the stiff end of diverter switch is electrically connected with the other end of pockels box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200732128U CN201075571Y (en) | 2007-08-01 | 2007-08-01 | Double impulse width output laser |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200732128U CN201075571Y (en) | 2007-08-01 | 2007-08-01 | Double impulse width output laser |
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| CN201075571Y true CN201075571Y (en) | 2008-06-18 |
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| CNU2007200732128U Expired - Fee Related CN201075571Y (en) | 2007-08-01 | 2007-08-01 | Double impulse width output laser |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102354904A (en) * | 2011-01-28 | 2012-02-15 | 中国科学院福建物质结构研究所 | Double-pulse lamp pump solid laser |
| CN102709801A (en) * | 2012-06-04 | 2012-10-03 | 中国科学院半导体研究所 | Laser capable of simultaneously outputting nanosecond pulses and pico-second pulses |
| CN104242037A (en) * | 2014-10-16 | 2014-12-24 | 哈尔滨工业大学 | Method and device for obtaining pulse string laser through itracavity modulation |
| CN104400229A (en) * | 2014-11-04 | 2015-03-11 | 无锡市南方电器制造有限公司 | Optical fiber laser cutting machine practical energy control and switching system |
| CN105514791A (en) * | 2016-01-19 | 2016-04-20 | 北京镭宝光电技术有限公司 | Laser device and method for generating adjustable series pulse by square wave pumping to adjust Q for multiple times |
| CN109512576A (en) * | 2018-11-20 | 2019-03-26 | 吉林省科英激光股份有限公司 | Electro-optical Q-switch Frequency-doubled-double pulse laser rubble system |
-
2007
- 2007-08-01 CN CNU2007200732128U patent/CN201075571Y/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102354904B (en) * | 2011-01-28 | 2016-06-29 | 中国科学院福建物质结构研究所 | double-pulse lamp pump solid laser |
| CN102354904A (en) * | 2011-01-28 | 2012-02-15 | 中国科学院福建物质结构研究所 | Double-pulse lamp pump solid laser |
| CN102709801A (en) * | 2012-06-04 | 2012-10-03 | 中国科学院半导体研究所 | Laser capable of simultaneously outputting nanosecond pulses and pico-second pulses |
| CN102709801B (en) * | 2012-06-04 | 2013-09-04 | 中国科学院半导体研究所 | Laser capable of simultaneously outputting nanosecond pulses and pico-second pulses |
| CN104242037A (en) * | 2014-10-16 | 2014-12-24 | 哈尔滨工业大学 | Method and device for obtaining pulse string laser through itracavity modulation |
| CN104400229A (en) * | 2014-11-04 | 2015-03-11 | 无锡市南方电器制造有限公司 | Optical fiber laser cutting machine practical energy control and switching system |
| CN104400229B (en) * | 2014-11-04 | 2016-03-02 | 无锡市南方电器制造有限公司 | Optical-fiber laser cutting machine energy hole switched system |
| CN105514791A (en) * | 2016-01-19 | 2016-04-20 | 北京镭宝光电技术有限公司 | Laser device and method for generating adjustable series pulse by square wave pumping to adjust Q for multiple times |
| CN105514791B (en) * | 2016-01-19 | 2019-01-22 | 北京镭宝光电技术有限公司 | The multiple laser aid and method for adjusting Q to generate adjustable series impulse of square wave pumping |
| CN109512576A (en) * | 2018-11-20 | 2019-03-26 | 吉林省科英激光股份有限公司 | Electro-optical Q-switch Frequency-doubled-double pulse laser rubble system |
| CN109512576B (en) * | 2018-11-20 | 2019-12-13 | 吉林省科英激光股份有限公司 | Electro-optical Q switch double-frequency double-pulse laser stone crushing system |
| WO2020103399A1 (en) * | 2018-11-20 | 2020-05-28 | 吉林省科英激光股份有限公司 | Electro-optical q-switch double-frequency double-pulse laser lithotripsy system |
| US11364078B2 (en) | 2018-11-20 | 2022-06-21 | Jilin Province King Laser Co., Ltd. | Electro-optic Q-switching double-frequency double-pulse laser lithotripsy system |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080618 Termination date: 20150801 |
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| EXPY | Termination of patent right or utility model |