CN201853935U - Compact multi-pulse electrooptic Q-switched solid laser - Google Patents
Compact multi-pulse electrooptic Q-switched solid laser Download PDFInfo
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- CN201853935U CN201853935U CN201020557513XU CN201020557513U CN201853935U CN 201853935 U CN201853935 U CN 201853935U CN 201020557513X U CN201020557513X U CN 201020557513XU CN 201020557513 U CN201020557513 U CN 201020557513U CN 201853935 U CN201853935 U CN 201853935U
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Abstract
The utility model relates to a compact multi-pulse electrooptic Q-switched solid laser, which comprises a laser power supply and a laser head with an air-cooled channel installed on the side surface, wherein an output mirror, a flashlamp-pumped module, a polaroid, an electrooptic Q-switched crystal and a full reflector are arranged in the laser head sequentially, and the laser power supply with adjustable pulse strength and time sequence is connected with the flashlamp-pumped module and an electrooptic Q-switch to provide the pulse signal. The flashlamp-pumped module is the water-cooled flashlamp-pumped module, and a cooling water inlet and outlet channel of the water-cooled flashlamp-pumped module is taken as an air-cooled channel. The laser power supply and the laser head are installed in a chassis. The compact multi-pulse electrooptic Q-switched solid laser has the advantages of multi-pulse and high-energy output, controllable pulse energy and time sequence, small, compact and simple structure, stable performance and maintenance-free design.
Description
Technical field
The utility model relates to a kind of solid state laser, the electric-optically Q-switched solid state laser of especially a kind of compact multiple-pulse.
Background technology
The single pulse energy that adopts the output of electric-optically Q-switched multiple-pulse output laser about hundred milli Jiao, pulse duration 10-20ns.This laser tests the speed (PIV) at high-rate laser photography, laser velocimeter, ion image, and fields such as laser medicine are widely used.But the pulse train of common multiple pulse laser output produces from same pumping process, be repeatedly to trigger electro-optical Q-switch in pumping process of photoflash lamp, thereby export a plurality of pulses, because electro-optical Q-switch opens and closes in the different delayed time position of the same pumping of photoflash lamp, the pulse train of output this moment is difficult to the consistency of its energy of control, and the output pulse energy is restricted, and the adjustable pulse interval scope is also very little.
The used heat that produces in the laser running must be discharged with effective means in addition, otherwise can make laser medium produce serious thermal effect, hinders the raising of laser output energy and beam quality, even can cause pumping source and laser medium thermal fracture.Common lamp pumping photosystem, disclosed among the CN2158094Y for example at Chinese patent CN2448586Y, generally adopt the water-cooled means that the heat of photoflash lamp and laser medium generation is taken away.Though can satisfy the system cools requirement well like this, additional water cooling equipment has comprised equipment such as water tank, water circulating pipe, radiator of water tank, water tank power supply, has increased the volume and the complexity of system greatly, is unfavorable for the miniaturization of system.It is little that market in urgent need obtains a kind of volume, simple in structure, non-maintaining, but and the solid state laser of multiple-pulse macro-energy output.Therefore, guarantee that solid state laser has good heat dissipation characteristics when the macro-energy multiple-pulse export, the heat that adopts the mode of non-water-cooled in time to drain pumping source and laser medium to be distributed, thus the volume of minimizing laser becomes urgent problem.
The utility model content
The utility model purpose is to overcome the deficiencies in the prior art, provides a kind of compact multiple-pulse electric-optically Q-switched solid state laser.This solid state laser adopts air-cooled mode to provide cooling for pump module, has save water-cooled mechanism, has reduced system bulk greatly; Adopt electric-optically Q-switched mode, can obtain narrow pulsewidth, the controlled laser output of pulse; Adopt the flash lamp pumping mode, reduced the complexity of system, and can obtain big pulse energy output.
Technical scheme of the present invention is: the electric-optically Q-switched solid state laser of a kind of compact multiple-pulse, it is characterized in that: comprise that Laser Power Devices and side are equipped with the laser head of air-cooled passage, laser head inside has outgoing mirror, flash lamp pumping module, polarizer, electric-optically Q-switched switch and total reflective mirror successively, and pulse strength is connected described flash lamp pumping module and electric-optically Q-switched switch so that pulse signal to be provided with the adjustable Laser Power Devices of sequential.
Laser works principle of the present invention is as follows: adopt the mode of optical pumping to store the energy in the laser medium (for example Nd:YAG crystal), the Q value that reduces in the resonant cavity promptly increases cavity loss, thereby stops the generation of laser generation.When the upper laser level inverted population is accumulated to optimum value in a large number, return to high Q value suddenly, energy storage just discharges with very short light pulse like this.Wherein be that laser pulse width, single pulse energy are usually only long with resonant cavity under no external interference factor affecting release time, energy storage intensity in the chamber, to open time of turn-offing resonant cavity, cavity loss etc. relevant.The Laser Power Devices of this laser connect flash lamp pumping module and electric-optically Q-switched switch simultaneously, and photoflash lamp is by repeatedly pumping of Laser Power Devices, and each pulse spike of pulse train all is based on independently pumping process, therefore can obtain bigger pulse energy; Because the injection energy of each pumping pulse and the time-delay of corresponding triggering laser are all adjustable, therefore can obtain the very high laser pulse sequence output of energy output consistency, the scope of adjustable pulse interval also increases greatly.On laser head, have air-cooled passage, adopt air-cooled mode to realize the efficient of laser medium and pumping photoflash lamp evenly cooled off, avoided adopting huge water cooling equipment, both reduced the volume of system, omitted maintenance again for cooling system.
The air-cooled passage that install described laser head side is communicated with the flash lamp pumping module, adopts air cooling way to provide cooling for described flash lamp pumping module.The cooling duct directly is connected with the flash lamp pumping module, has improved system cools efficient.
Described flash lamp pumping module is common water-cooled flash lamp pumping module, but not water flowing in this pump module, but adopt the cooling water access way of this pump module to cool off as air-cooled passage.Adopt common water-cooled flash lamp pumping module as can air-cooled pump module make system manufacturing, safeguard easier.
Comprise photoflash lamp and laser medium in the described flash lamp pumping module, described laser medium is neodymium-doped yttrium-aluminum garnet crystal (Nd:YAG), or Nd-doped yttrium vanadate crystal (Nd:YLF).
Described Laser Power Devices are the Laser Power Devices of output by the multisequencing pulse.Make system's service intermittent like this, further optimized the system cools effect.
Between described flash lamp pumping module and electric-optically Q-switched switch, also have λ/4 wave plates.
Have frequency-doubling crystal on the laser emitting light path outside outgoing mirror, frequency-doubling crystal can be a ktp crystal, realizes laser freuqency doubling with this, the green glow of output 532nm.
Described electric-optically Q-switched K switch D
*P crystal, bbo crystal or Li:NbO
3Crystal.
Described Laser Power Devices and described laser head are integrated in the cabinet.
The beneficial effects of the utility model are:
1, adopts air cooling way, by the cooling duct of optimizing, realization is to the efficient evenly cooling of laser medium and pumping photoflash lamp, in conjunction with service intermittent mode (working clearance is not more than 20s), can satisfy the cooling requirement of system fully, and make system constitute simplification, so system can be integrated into a little volume, size as common desktop computer case realize complete machine densification, miniaturization, non-maintaining.
2, Laser Power Devices connect flash lamp pumping module and electro-optical Q-switch simultaneously, and photoflash lamp is by repeatedly pumping of Laser Power Devices, and each pulse spike of pulse train all is based on independently pumping process, therefore can obtain bigger pulse energy; Because the time-delay of the injection energy of each pumping pulse and corresponding triggering laser is all adjustable, therefore can obtain the very high laser pulse sequence output of energy output consistency, and the scope of adjustable pulse interval increases greatly also simultaneously.In one embodiment, can realize the output of single pulse energy 140mJ.
2, between laser medium and total reflective mirror, place λ/4 wave plates, λ/4 wave plates make the polarised light phase shift pi/2 of process, the polarised light depolarization phenomenon that the thermal birefringence effect that compensation at high temperature produces owing to laser medium causes, the power output of raising solid state laser.
3, system adopts the mode of flash lamp pumping, has reduced the complexity of system.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified;
Fig. 1 is the electric-optically Q-switched solid state laser of compact multiple-pulse of the present utility model.
Fig. 2 is the pulse signal of Laser Power Devices output.
1. cabinets among the figure, 2. laser head, 3. air-cooled passage, 4. Laser Power Devices, 5. outgoing mirror, 6. flash lamp pumping module, 7. polarizer, 8. electric-optically Q-switched switch, 9. total reflective mirror, 10. λ/4 wave plates.
Embodiment
Below in conjunction with accompanying drawing 1,2 and embodiment the utility model is described further.As shown in Figure 1, the electric-optically Q-switched solid state laser of compact multiple-pulse in the utility model, comprise that Laser Power Devices 4 and side are equipped with the laser head 2 of air-cooled passage, laser head 2 inside have outgoing mirror 5, flash lamp pumping module 6, polarizer 7, electric-optically Q-switched switch 8 and total reflective mirror 9 successively, and Laser Power Devices 4 connection flash lamp pumping modules 6 and electric-optically Q-switched switch 8 are to provide pulse signal.The flash lamp pumping module comprises photoflash lamp and laser medium, and air-cooled passage 3 is installed on laser head 2, and is communicated with flash lamp pumping module 6, adopts air cooling way to provide cooling for described flash lamp pumping module.Owing to adopt air cooling way, save water-cooled mechanism, reduced system bulk greatly.In one embodiment, can adopt common water cooling flash lamp pumping module, but the not water flowing of cooling water access way of this pump module, but adopt the cooling water access way 3 of this pump module to cool off as air-cooled passage 3.
Laser Power Devices 4 are pulse laser power supply.In one embodiment, can adopt the adjustable Laser Power Devices of pulse strength and sequential.Laser Power Devices 4 connect flash lamp pumping module 6 and electro-optical Q-switch 8 simultaneously, and photoflash lamp is by repeatedly pumping of Laser Power Devices, and each pulse spike of pulse train all is based on independently pumping process, therefore can obtain bigger pulse energy; Because the time-delay of the injection energy of each pumping pulse and corresponding triggering laser is all adjustable, therefore can obtain the very high laser pulse sequence output of energy output consistency, and the scope of adjustable pulse interval increases greatly also simultaneously.Further, referring to Fig. 2, the pumping pulse signal of these Laser Power Devices 4 outputs is made up of the multisequencing pulse, and each pulse strength is controlled in each sequence, and time-delay is adjustable between adjacent twice pumping pulse.Like this, laser can adopt intermittent operation mode, and the working clearance is not more than 20 seconds in one embodiment, adopts air-cooled cooling thereby further satisfy system.Laser Power Devices 4 and laser head 2 are integrated in the cabinet 1.Therefore system can be integrated into a little volume, and size as common desktop computer case realize complete machine densification, miniaturization, non-maintaining.
Because laser medium at high temperature thermal birefringence effect can take place, the polarised light that forms by polarizer 7 changes by laser medium rear polarizer attitude, can export from axle by polarizer 7 once more, thereby increase cavity loss.Can in the chamber, insert λ/4 wave plates to reduce depolarization phenomenon in the chamber.Laser medium can be neodymium-doped yttrium-aluminum garnet crystal (Nd:YAG), or Nd-doped yttrium vanadate crystal (Nd:YLF).Polarizer 7 becomes Brewster's angle with the resonant cavity optical axis.Electric-optically Q-switched switch is KD
*P crystal, bbo crystal or Li:NbO
3Crystal.Can also have frequency-doubling crystal on the laser emitting light path of outgoing mirror 5 outsides being positioned at laser head 2 inside, frequency-doubling crystal can be a ktp crystal, realizes laser freuqency doubling with this, the green glow of output 532nm.。
Concrete: Laser Power Devices 4 are the Laser Power Devices of output multisequencing pulse, adopt the multisequencing pulse that the flash lamp pumping module is carried out pulse pump.Comprise a plurality of pulses in 1 sequence, as shown in Figure 2, comprise three pumping injecting voltages in 1 pulse train, the pumping injecting voltage is 700 volts to 1200 volts, the time interval between the first pumping injecting voltage and the second pumping injecting voltage is 100 μ s to 900 μ s, the time interval of the second pumping injecting voltage and the 3rd pumping injecting voltage is 110 μ s to 900 μ s, the step-length in this time interval, and promptly minimum unit of adjustment is 10 μ s.The pulse duration of pumping injecting voltage is 130ms, and the time interval maximum between the pulse train can be 20 seconds.Electric-optically Q-switched switch is potassium dideuterium phosphate crystal (KD
*P).Polarizer 7 becomes Brewster's angle with optical axis, at KD
*Place λ/4 wave plates 10 between P and the total reflective mirror.Total reflective mirror 9 plating wavelength are 1064 films that are all-trans, and outgoing mirror 5 plating 1064nm partly see through film.Laser output wavelength 1064nm.In a specific embodiment, the first pumping injecting voltage is 1100 volts, the second pumping injecting voltage is 780 volts, the 3rd pumping injecting voltage is 730 volts, and the time interval between the first pumping injecting voltage and the second pumping injecting voltage is 110 microseconds, and the time interval of the second pumping injecting voltage and the 3rd pumping injecting voltage is 110 microseconds, obtain laser output pulse energy 140mJ, pulsewidth 12ns, energy stability≤4%, three pulse inconsistency≤6%.
But electric-optically Q-switched solid state laser multiple-pulse macro-energy output of the present utility model, pulse energy and sequential are controlled, and the little compactness of complete machine is simple in structure, and stable performance is non-maintaining.The fields such as (PIV), laser medicine of testing the speed at high-rate laser photography, laser velocimeter, ion image have wide practical use.
Claims (10)
1. electric-optically Q-switched solid state laser of compact multiple-pulse, it is characterized in that: comprise that Laser Power Devices and side are equipped with the laser head of air-cooled passage, laser head inside has outgoing mirror, flash lamp pumping module, polarizer, electric-optically Q-switched switch and total reflective mirror successively, and pulse strength is connected described flash lamp pumping module and described electric-optically Q-switched switch so that pulse signal to be provided with the adjustable Laser Power Devices of sequential.
2. electric-optically Q-switched solid state laser according to claim 1 is characterized in that: the air-cooled passage that install described laser head side is communicated with the flash lamp pumping module, adopts air cooling way to provide cooling for described flash lamp pumping module.
3. electric-optically Q-switched solid state laser according to claim 2 is characterized in that: described flash lamp pumping module is a water-cooled flash lamp pumping module, and the cooling water access way that adopts water-cooled flash lamp pumping module is as described air-cooled passage.
4. electric-optically Q-switched solid state laser according to claim 1 is characterized in that: comprise photoflash lamp and laser medium in the described flash lamp pumping module.
5. electric-optically Q-switched solid state laser according to claim 4 is characterized in that: described laser medium is the neodymium-doped yttrium-aluminum garnet crystal, or the Nd-doped yttrium vanadate crystal.
6. electric-optically Q-switched solid state laser according to claim 1 is characterized in that: described Laser Power Devices are the Laser Power Devices of output multisequencing pulse.
7. electric-optically Q-switched solid state laser according to claim 1 is characterized in that: λ/4 wave plates are arranged between described flash lamp pumping module and electric-optically Q-switched switch.
8. electric-optically Q-switched solid state laser according to claim 1 is characterized in that: have frequency-doubling crystal on the laser emitting light path outside outgoing mirror.
9. electric-optically Q-switched solid state laser according to claim 1 is characterized in that: described electric-optically Q-switched switch is KD
*P crystal, bbo crystal or Li:NbO
3Crystal.
10. electric-optically Q-switched solid state laser according to claim 1 is characterized in that: described Laser Power Devices and described laser head are integrated in the cabinet.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020557513XU CN201853935U (en) | 2010-10-12 | 2010-10-12 | Compact multi-pulse electrooptic Q-switched solid laser |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020557513XU CN201853935U (en) | 2010-10-12 | 2010-10-12 | Compact multi-pulse electrooptic Q-switched solid laser |
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| CN201853935U true CN201853935U (en) | 2011-06-01 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102589572A (en) * | 2012-01-18 | 2012-07-18 | 西安理工大学 | Tape processing system and tape processing detection method for precise leveling staff |
| CN103300934A (en) * | 2013-04-11 | 2013-09-18 | 中国科学院合肥物质科学研究院 | 2.79 mu m Q-switched erbium laser dental instrument |
| CN103701017A (en) * | 2013-12-16 | 2014-04-02 | 北京工业大学 | Integrated set of high-power frequency tripling ultraviolet solid laser |
| CN104849244A (en) * | 2015-05-28 | 2015-08-19 | 中国科学技术大学 | Multi-pulse laser-induced breakdown spectroscopy measuring method and system |
| CN115395350A (en) * | 2022-04-22 | 2022-11-25 | 成都沃达惠康科技股份有限公司 | Laser emission air-cooled component and high-efficiency endurance portable laser blood sampling instrument |
-
2010
- 2010-10-12 CN CN201020557513XU patent/CN201853935U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102589572A (en) * | 2012-01-18 | 2012-07-18 | 西安理工大学 | Tape processing system and tape processing detection method for precise leveling staff |
| CN103300934A (en) * | 2013-04-11 | 2013-09-18 | 中国科学院合肥物质科学研究院 | 2.79 mu m Q-switched erbium laser dental instrument |
| CN103701017A (en) * | 2013-12-16 | 2014-04-02 | 北京工业大学 | Integrated set of high-power frequency tripling ultraviolet solid laser |
| CN103701017B (en) * | 2013-12-16 | 2016-08-24 | 北京工业大学 | A kind of high-power frequency tripling ultraviolet solid-state laser integrating device |
| CN104849244A (en) * | 2015-05-28 | 2015-08-19 | 中国科学技术大学 | Multi-pulse laser-induced breakdown spectroscopy measuring method and system |
| CN104849244B (en) * | 2015-05-28 | 2018-11-02 | 中国科学技术大学 | A kind of multi-pulse laser induced breakdown spectroscopy measurement method and system |
| CN115395350A (en) * | 2022-04-22 | 2022-11-25 | 成都沃达惠康科技股份有限公司 | Laser emission air-cooled component and high-efficiency endurance portable laser blood sampling instrument |
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110601 Termination date: 20131012 |