CN202737315U - High-energy laser frequency-doubling Q-switching device - Google Patents
High-energy laser frequency-doubling Q-switching device Download PDFInfo
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- CN202737315U CN202737315U CN 201220253062 CN201220253062U CN202737315U CN 202737315 U CN202737315 U CN 202737315U CN 201220253062 CN201220253062 CN 201220253062 CN 201220253062 U CN201220253062 U CN 201220253062U CN 202737315 U CN202737315 U CN 202737315U
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Abstract
The utility model discloses a high-energy laser frequency-doubling Q-switching device. The device includes a linear polarization electro-optical Q-switching laser generating device, at least two light-splitting frequency-doubling devices and a bunching lens set. Each light-splitting frequency-doubling device comprises a spectroscope, a half wave plate or quarter-wave plate, a frequency-doubling crystal, a fundamental-frequency light high-reflective-rate frequency-doubled-light high-light-transmittance optical filter, a beam expanding lens set, a diaphragm and a frequency-doubled light holophote which are sequentially arranged along a light-splitting light path; the spectroscope in each light-splitting frequency-doubling device is arranged at a laser-outgoing light path of the linear polarization electro-optical Q-switching laser generating device; the light-outgoing light path of the holophote in each light-splitting frequency-doubling device is corresponding to the bunching lens set, and outputs shaped multi-beam laser outputted by the at least two light-splitting frequency-doubling devices in a bunched manner through the bunching lens set, and at the same time, the requirements for the size and quality of the frequency-doubling crystal can be effectively lowered.
Description
Technical field
The utility model relates to a kind of laser equipment, relates in particular to a kind of high energy laser equipment.
Background technology
Titanium-doped sapphire laser, be called for short ti sapphire laser, because of its Output of laser wavelength in the larger context continuously adjustable (660nm ~ 1.1 μ m) widely purposes is being arranged aspect medical science and the scientific research, its pumping source commonly used then often adopts ripe 532nm Q-switched Pulse Laser of present technology, and the 532nm laser then Nd:YAG laser cavity external frequency multiplication of normal operation lamp pump obtains.
The 532nm Q-switched Pulse Laser is usually used in the pumping to ti sapphire laser, and the damage threshold of titanium jewel is lower, for obtaining larger Output of laser after tuning, the general mode of multistage amplification that adopts obtains, pumping source then often adopts the accent Q532nm laser with larger single pulse energy, uses the spectroscope of fixing saturating reflectivity to carry out doing respectively after the light splitting pumping source of oscillator stage and amplifying stage during use.The frequency-doubling crystal that produces 532nm laser adopts the nonlinear materials such as barium metaborate (BBO), three lithium borates (LBO), potassium dihydrogen phosphate (KDP) and lithium niobate (LN) usually, but these materials exist or growth difficulty or coupling difficulty or damage threshold is low or the various difficult problems such as easy deliquescence cause being difficult to promote the popularization use.General potassium titanium oxide phosphate (KTP) crystal that adopts is used as the frequency-doubling crystal use now, although this crystal exists phase matching angle responsive to variations in temperature, grey mark effect and the lower shortcoming of this crystal laser damage threshold valve are arranged during high power pump, but this crystal exist non linear coefficient large, in air stable in properties, shg efficiency advantages of higher, because technique is very ripe at present, cost performance is high, is the nonlinear crystalline material of the most often using in the present middle-size and small-size laser.
For medical science and scientific research aspect, with high-octane accent Q532nm laser usually with the large spot basic frequency laser by large-sized frequency-doubling crystal then the compression light beam diameter obtain, but obtainable high-energy double-frequency laser ceiling capacity is subjected to the limitation of the damage threshold of rete on crystal and the crystal can't be too high.
The utility model content
Problem to be solved in the utility model provides a kind of device that closes bundle output high-energy Q-switch laser for multi-pass while frequency multiplication.This device can be exported high-energy frequency doubled light laser, and can effectively reduce the requirement to frequency-doubling crystal size and quality.
The utility model is to solve the problems of the technologies described above to adopt following technical scheme:
A kind of high energy laser frequency multiplication Q-modulating device comprises a linear polarization electric-optically Q-switched laser generating means, also comprises at least two light splitting frequency doubling devices and a light combination mirror group; Described light splitting frequency doubling device comprises the spectroscope that arranges along the light splitting optical path order, / 2nd wave plates or quarter-wave plate, frequency-doubling crystal, the high saturating filter of the high anti-frequency multiplication of fundamental frequency light, the beam expanding lens group, diaphragm and frequency doubled light completely reflecting mirror, spectroscope in described each light splitting frequency doubling device is arranged on the laser emitting light path of described linear polarization electric-optically Q-switched laser generating means, the corresponding described light combination mirror group of the emitting light path of the completely reflecting mirror in described each light splitting frequency doubling device, and by described light combination mirror group bundle is closed in the shaping of the multi-path laser of described at least two light splitting frequency doubling devices output and export.
Described linear polarization electric-optically Q-switched laser generating means is 1064nm linear polarization electric-optically Q-switched laser generating means; Described spectroscope is the 1064nm spectroscope, and described filter is the high thoroughly filter of the high anti-532nm of 1064nm, and described beam expanding lens is 532nm beam expanding lens group, and described completely reflecting mirror is the 532nm completely reflecting mirror.
The utility model has been finished the frequency multiplication of high-energy Q-switch laser effectively by cleverly light splitting, frequency multiplication, the design of closing bundle, by optics the high-energy Q-switch laser is carried out light splitting with specific transmission/reflection ratio (Tp/Rp), through different optics basic frequency laser is divided near uniform equal portions, then undertaken the rear output frequency doubled light laser that then filters of the basic frequency laser frequency multiplication after the light splitting by frequency-doubling crystal, the laser of frequency multiplication output through the shaping of collimator and extender diaphragm after again by lens combination Shu Chengyi road Laser output.
So both finish the frequency multiplication of high-energy Q-switch laser, rationally controlled dexterously again the size of frequency-doubling crystal, controlled the cost of optical element.
For the Energy distribution that guarantees light beam is tried one's best evenly, / 2nd wave plates are housed in each light path, by the adjusting to frequency-doubling crystal and 1/2nd wave plates, can make the energy density of laser on each road as far as possible identical, utilize simultaneously diaphragm make final output laser energy density as far as possible evenly.End at corresponding non-main optical path uses potsherd that laser is carried out the scattering absorption.Simultaneously, by the angle of rotating wave plate and the angle of frequency-doubling crystal, can realize that each light path energy is adjustable separately.
Try one's best evenly for realizing closing the energy density of restrainting the rear laser of exporting, in the light path of correspondence, be provided with diaphragm, by the diaphragm of adjusting and use suitable shape and size, can realize closing the adjusting of restrainting rear laser facula shape and Energy distribution.
By change multi-pass that crystalline material and plated film can also realize other various wavelength simultaneously frequency multiplication close bundle output.
The utility model utilizes the advantage of the high-energy 1064nm laser of the excellent beam quality of easy acquisition cleverly, use spectroscope and 1/2nd wave plates (or quarter-wave plate) that the frequency multiplication in each light path is exported and regulate separately, take full advantage of the performance of electric-optically Q-switched 1064nm laser.And according to aforesaid technical scheme, by changing spectroscopical light splitting ratio and quantity and the light combination mirror incident beam being carried out spatial arrangement, can realize more high-octane output, can realize that by changing crystalline material and plated film the multi-pass while frequency multiplication of different wave length is closed bundle output.Based on final use, in many application to can adopt in the less demanding situation of light beam coherence first to fundamental frequency light carry out light splitting then respectively the frequency multiplication method of closing again bundle realize, the method not only can obtain high-octane double-frequency laser but also can effectively avoid because of the low problem of bringing of damage threshold.
Description of drawings
For above-mentioned purpose of the present utility model, feature and advantage can be become apparent, below in conjunction with accompanying drawing embodiment of the present utility model is elaborated, wherein:
Fig. 1 is the light channel structure schematic diagram that the utility model multi-pass while frequency multiplication is closed bundle output high-energy Q-switch laser equipment.
Among the figure:
1. 1064nm linear polarization electric-optically Q-switched laser generating means 2. 1064nm spectroscopes
3. 4. frequency-doubling crystal of 1/2nd wave plates (or quarter-wave plate)
5. high thoroughly filter 6. 532nm beam expanding lens groups of the high anti-532nm of 1064nm
7. diaphragm 8. 532nm completely reflecting mirrors
9. light combination mirror group.
Embodiment
Fig. 1 shows a kind of high energy laser frequency multiplication Q-modulating device, comprises a 1064nm linear polarization electric-optically Q-switched laser generating means 1, also comprises three light splitting frequency doubling devices and a light combination mirror group 9; Described light splitting frequency doubling device comprises the 1064nm spectroscope 2 that arranges along the light splitting optical path order, / 2nd wave plate 3(or quarter-wave plates), frequency-doubling crystal 4, the high thoroughly filter 5 of the high anti-532nm of 1064nm, 532nm beam expanding lens group 6, diaphragm 7 and 532nm completely reflecting mirror 8,1064nm spectroscope 2 in described each light splitting frequency doubling device is arranged on the laser emitting light path of described 1064nm linear polarization electric-optically Q-switched laser generating means 1, the corresponding described light combination mirror group 9 of the emitting light path of the 532nm completely reflecting mirror 8 in described each light splitting frequency doubling device, and by described light combination mirror group 9 bundle is closed in the shaping of three road 532nm laser of described three light splitting frequency doubling devices output and export.
Also can realize equally the multi-pass while frequency multiplication of other various wavelength and close bundle output by changing frequency-doubling crystal material and plated film.
According to aforesaid technical scheme, similarly, by changing spectroscopical light splitting ratio and quantity and the light combination mirror incident beam being carried out spatial arrangement, also can configure the light splitting frequency doubling device of other quantity, thereby realize more high-octane output,
The above; it only is embodiment of the present utility model; but protection range of the present utility model is not limited to this; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; can expect easily changing or replacing, all should be encompassed within the protection range of the present utility model.Therefore, protection range of the present utility model should be as the criterion by described protection range with claim.
Claims (2)
1. a high energy laser frequency multiplication Q-modulating device comprises a linear polarization electric-optically Q-switched laser generating means, it is characterized in that: also comprise at least two light splitting frequency doubling devices and a light combination mirror group; Described light splitting frequency doubling device comprises the spectroscope that arranges along the light splitting optical path order, / 2nd wave plates or quarter-wave plate, frequency-doubling crystal, the high saturating filter of the high anti-frequency doubled light of fundamental frequency light, the beam expanding lens group, diaphragm and frequency doubled light completely reflecting mirror, spectroscope in described each light splitting frequency doubling device is arranged on the laser emitting light path of described linear polarization electric-optically Q-switched laser generating means, the corresponding described light combination mirror group of the emitting light path of the completely reflecting mirror in described each light splitting frequency doubling device, and by described light combination mirror group bundle is closed in the shaping of the multi-path laser of described at least two light splitting frequency doubling devices output and export.
2. high energy laser frequency multiplication Q-modulating device according to claim 1, it is characterized in that: described linear polarization electric-optically Q-switched laser generating means is 1064nm linear polarization electric-optically Q-switched laser generating means; Described spectroscope is the 1064nm spectroscope, and described filter is the high thoroughly filter of the high anti-532nm of 1064nm, and described beam expanding lens is 532nm beam expanding lens group, and described completely reflecting mirror is the 532nm completely reflecting mirror.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220253062 CN202737315U (en) | 2012-05-31 | 2012-05-31 | High-energy laser frequency-doubling Q-switching device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220253062 CN202737315U (en) | 2012-05-31 | 2012-05-31 | High-energy laser frequency-doubling Q-switching device |
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| CN202737315U true CN202737315U (en) | 2013-02-13 |
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| CN 201220253062 Withdrawn - After Issue CN202737315U (en) | 2012-05-31 | 2012-05-31 | High-energy laser frequency-doubling Q-switching device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102664344A (en) * | 2012-05-31 | 2012-09-12 | 上海奥通激光技术有限公司 | High-power laser frequency-doubling Q-switching device |
| CN105006732A (en) * | 2015-08-12 | 2015-10-28 | 广州安特激光技术有限公司 | Medium and small power LD parallelly pumped high-power green laser |
| CN108761622A (en) * | 2018-08-17 | 2018-11-06 | 山东大学 | A kind of true zero level optical wave plate of the large scale of low wavelength sensitivity and the preparation method and application thereof |
-
2012
- 2012-05-31 CN CN 201220253062 patent/CN202737315U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102664344A (en) * | 2012-05-31 | 2012-09-12 | 上海奥通激光技术有限公司 | High-power laser frequency-doubling Q-switching device |
| CN102664344B (en) * | 2012-05-31 | 2018-05-08 | 上海奥通激光技术有限公司 | A kind of high energy laser frequency multiplication Q-modulating device |
| CN105006732A (en) * | 2015-08-12 | 2015-10-28 | 广州安特激光技术有限公司 | Medium and small power LD parallelly pumped high-power green laser |
| CN108761622A (en) * | 2018-08-17 | 2018-11-06 | 山东大学 | A kind of true zero level optical wave plate of the large scale of low wavelength sensitivity and the preparation method and application thereof |
| CN108761622B (en) * | 2018-08-17 | 2024-01-23 | 山东大学 | Large-size true zero-order optical wave plate with low wavelength sensitivity and preparation method and application thereof |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130213 Effective date of abandoning: 20180508 |
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| AV01 | Patent right actively abandoned |