CN1897369A - Red. green and blue three-base color laser with high-power side pump running simultaneouslly - Google Patents
Red. green and blue three-base color laser with high-power side pump running simultaneouslly Download PDFInfo
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- CN1897369A CN1897369A CN 200610043048 CN200610043048A CN1897369A CN 1897369 A CN1897369 A CN 1897369A CN 200610043048 CN200610043048 CN 200610043048 CN 200610043048 A CN200610043048 A CN 200610043048A CN 1897369 A CN1897369 A CN 1897369A
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Abstract
A tricolor laser that the high-power red, green and blue of the side pump operate together, the horizontal light-path of the plano-concave total reflection lens sets the acousto-optic Q switch, the laser crystal, the first beam lens, the second beam lens, the two-time harmonic lens, the third frequency multiplication crystal, the third plane reflector; the one side of the first beam lens facing the vertical light-path sets the first frequency multiplication crystal, the first plane reflector, the forth plane reflector setting on the other side of the first beam lens in turn; the one side of the second beam lens facing the vertical light-path sets the second frequency multiplication crystal, the second plane reflector, the fifth plane reflector setting on the other side of the second beam lens in turn. The invention can achieve the tricolor laser output of the high-power density red, green and blue.
Description
Technical field
The present invention relates to a kind of multi-wavelength solid state laser, particularly the tricolor laser device that turns round simultaneously of profile pump high power red, green, blue.
Background technology
Since nineteen sixty, first ruby laser was born in the world, all kinds of lasers and laser technology development were very rapid, and wherein, the multiple-wavelength laser especially development of red, green, blue tricolor laser device gets most of the attention.Reason is the defective that it has overcome laser output single wavelength, vast market and application prospect is all arranged, as large-screen laser television, laser color demonstration, laser amusement performance, laser manufacturing etc. in numerous areas.The red, green, blue tricolor laser shows it is the state-of-the-art technology of field of projection display, and it has more superiority than other Display Technique: jumbotron, high brightness, colour gamut is wide, high saturation colour is color, high-resolution, can be in shape face demonstration arbitrarily, high-contrast etc.Therefore, red, green, blue tricolor laser device also becomes the emphasis of researching and developing in the laser display field.
At present, with regard to high power red, green, blue tricolor laser light source, gas laser and solid state laser two classes are arranged.And in the gas laser, adopt argon ion and krypton ion gas laser as three primary light source, and not only power consumption is big, and volume is big, and efficient is low, the Operation and Maintenance difficulty, the life-span is also short.Therefore, existing gradually by trend that solid state laser replaced.Realize red in the world, green, the single fundamental frequency light that the running of blue tricolor laser device is all exported based on a certain laser usually, pass through the repeatedly conversion (optical parametric oscillator of nonlinear optics frequency again, frequency multiplication, and frequently) realize red, green, the output of blue tricolor laser, as produce the fundamental frequency light of 1047nm single wavelength with a Nd:YLF laser, by producing the 523nm frequency doubled light behind the frequency-doubling crystal, this green glow is by behind the optical parametric oscillator, exported the green glow of idle light of 896nm flashlight and 1256nm and 523nm simultaneously, flashlight is exported 448nm blue light and 628nm ruddiness respectively through behind the frequency-doubling crystal respectively with idle light, thereby finishes red, green, the output (US.Patent 5740190) of blue tricolor laser.But the production process of such red, green, blue tricolor laser is comparatively complicated, and cost is also higher.
Summary of the invention
The objective of the invention is to overcome above-mentioned prior art deficiency, the tricolor laser device that provides a kind of profile pump high power red, green, blue to turn round simultaneously, realize the red, green, blue tricolor laser output of high power density, have compact conformation, efficient height, operating cost low, be convenient to adjust, the advantage of work safety.
Realize that technical scheme of the present invention is to solve like this: be disposed with acoustooptic Q-switching, laser crystal, first beam splitter, second beam splitter, second harmonic mirror, frequency tripling crystal, the 3rd plane mirror on the horizontal optical path of plano-concave total reflection end mirror; One side towards first beam splitter on the vertical optical path sets gradually first frequency-doubling crystal, first plane mirror, and the another side of first beam splitter is provided with Siping City's face speculum; One side towards second beam splitter on the vertical optical path sets gradually second frequency-doubling crystal, second plane mirror, and the another side of second beam splitter is provided with the 5th plane mirror.
The angle of inclination of first beam splitter, second beam splitter and horizontal forward angle are 135 °.
First beam splitter and Siping City's face speculum are mutually 90 °, and second beam splitter and the 5th plane mirror are mutually 90 °.
Plano-concave total reflection end mirror constitutes resonant cavity with first plane mirror, second plane mirror, the 3rd plane mirror respectively.
First frequency-doubling crystal, second frequency-doubling crystal, frequency tripling crystal can be a kind of, two or three crystal in three lithium borates (LBO), potassium titanium oxide phosphate (KTP), beta-barium metaborate (BBO), the metaboric acid bismuth nonlinear optical crystals such as (BIBO).The side of above frequency-doubling crystal is evenly smeared silver powder and put into the water-cooling copper billet with behind the indium foil parcel.
Gain media adopts the laser crystal of Nd ion doped, and neodymium ion is at energy level
4F
3/2-
4I
13/2,
4F
3/2-
4I
11/2,
4F
3/2-
4I
9/2Transition is to produce the three-wavelength fundamental frequency light of 1.3 microns, 1.0 microns and 0.9 micron waveband scope.
The tricolor laser device that profile pump high power red, green, blue of the present invention turns round simultaneously, adopt the left side end mirror of a plano-concave mirror as resonant cavity, realized the total reflection of three-wavelength fundamental frequency light simultaneously, reduced the element that constitutes laser resonant cavity, made its structure more simple compact; Adopt beam splitter, will be divided into three road light along the wide angle of three-wavelength fundamental frequency that the laser crystal optical axis is propagated, make them form vibration respectively in corresponding resonant cavity, like this, each road light can be independent of other light path to be regulated separately, makes operation more convenient; Adopt the second harmonic mirror, the frequency doubled light total reflection with the fundamental frequency light secondary of 1.0 micron wave length scopes is produced after by frequency-doubling crystal again by outgoing mirror output, has improved the conversion efficiency and the power output of this wave band frequency doubled light; Adopt acoustooptic Q-switching, make continuous three-wavelength fundamental frequency light convert pulse laser to, thereby obtain high efficiency red, green, blue tricolor laser with high repetition frequency and high-peak power.
Description of drawings
Accompanying drawing is a structural representation of the present invention.
Below in conjunction with accompanying drawing content of the present invention is described in further detail.
Embodiment
Shown in accompanying drawing, be disposed with acoustooptic Q-switching 14, laser crystal 10, first beam splitter 5, second beam splitter 6, second harmonic mirror 9, frequency tripling crystal 13, the 3rd plane mirror 4 on the horizontal optical path of plano-concave total reflection end mirror 1; The another side that sets gradually first frequency-doubling crystal 11, first plane mirror, 2, the first beam splitters 5 towards the one side of first beam splitter 5 on the vertical optical path is provided with Siping City's face speculum 7; The another side that sets gradually second frequency-doubling crystal 12, second plane mirror, 3, the second beam splitters 6 towards the one side of second beam splitter 6 on the vertical optical path is provided with the 5th plane mirror 8.
The angle of inclination and the horizontal forward angle of first beam splitter 5, second beam splitter 6 are 135 °.
First beam splitter 5 and Siping City's face speculum 7 are mutually 90 °, and second beam splitter 6 and the 5th plane mirror 8 are mutually 90 °.
Mix Nd
3+Laser crystal absorptive pumping light energy after, form inverted population and distribute, work as Nd
3+At energy level
4F
3/2-
4I
13/2,
4F
3/2-
4I
11/2,
4F
3/2-
4I
9/2Transition just produces the three-wavelength fundamental frequency light of 1.3 microns, 1.0 microns and 0.9 micron waveband scope.Wherein 0.9 micron fundamental frequency light incides plano-concave total reflection end mirror 1, reverberation is respectively through acoustooptic Q-switching 14, the laser crystal 10 and first beam splitter 5 reflect after first frequency-doubling crystal 11 incides first plane mirror 2 with 45 °, first plane mirror 2 with non-switched fundamental frequency light along original optical path reflected back plano-concave total reflection end mirror 1, the frequency doubling Blue-light laser that produces through first frequency-doubling crystal 11 is reflected respectively through first frequency-doubling crystal 11 by first plane mirror 2, first beam splitter 5 incides Siping City's face speculum 7, the Siping City's face speculums 7 to be exported incident light with 45 reflection back horizontal direction;
1.3 the fundamental frequency light of micron incides plano-concave total reflection end mirror 1, reverberation is respectively through acoustooptic Q-switching 14, laser crystal 10 incides second beam splitter 6 through first beam splitter 5, second beam splitter 6 reflects it after second frequency-doubling crystal 12 incides second plane mirror 3 with 45, second plane mirror 3 with non-switched fundamental frequency light along original optical path reflected back plano-concave total reflection end mirror 1, after red laser that second frequency-doubling crystal 12 produces is by 3 reflections of second plane mirror once more through second frequency-doubling crystal 12, second beam splitter 6 incides the 5th plane mirror 8, the five plane mirrors 8 to be exported it with 45 reflection back horizontal direction;
1.0 the fundamental frequency light of micron incides plano-concave total reflection end mirror 1, reverberation is respectively through acoustooptic Q-switching 14, laser crystal 10 incides second beam splitter 6 through first beam splitter 5, the emergent light of second beam splitter 6 incides frequency tripling crystal 13 behind second harmonic mirror 9, the frequency multiplication green laser of frequency tripling crystal 13 outgoing is exported through resonant cavity the 3rd plane mirror 4 horizontal directions, non-switched fundamental frequency light returns plano-concave total reflection end mirror 1 by the 3rd plane mirror 4 reflection backs along former road, fundamental frequency light is exported by the 3rd plane mirror 4 through frequency tripling crystal 13 again after the frequency multiplication green laser that frequency tripling crystal 13 produces is reflected by second harmonic mirror 9 once more.
Below with LD profile pump Nd
3+: the YAG laser crystal produces 946nm, 1319nm, 1064nm three-wavelength fundamental frequency light, is that example specify with its frequency multiplication to produce high power red turquoise tricolor laser with three LBO frequency-doubling crystals.
Laser crystal Nd
3+: after the YAG10 absorptive pumping light energy, form population inversion and distribute, when neodymium ion at energy level
4F
3/2-
4I
13/2,
4F
3/2-
4I
11/2,
4F
3/2-
4I
9/2During transition, just produce 1319nm, 1064nm and 946nm three-wavelength fundamental frequency light, the fundamental frequency light of 946nm propagates into first plane mirror 2 and forms vibration after 1 total reflection of plano-concave total reflection end mirror and first beam splitter 5 are with the 45 reflection, 1319nm fundamental frequency light is reflexed to second plane mirror 3 and form oscillation light between the plano-concave total reflection end mirror 1 and second plane mirror 3 by second beam splitter 6 after through 1 total reflection of plano-concave total reflection end mirror and by first beam splitter 5 with 45, and 1064nm fundamental frequency light forms vibration in the resonant cavity that plano-concave total reflection end mirror 1 and the 3rd plane mirror 4 are formed.The waist radius place of fundamental frequency light adds frequency-doubling crystal LBO11, LBO12, LBO13 in three resonant cavitys respectively, produces blue (473nm), red (660nm), green (532nm) tricolor laser.473nm blue laser and 660nm red laser are exported with the 45 reflection levels respectively by Siping City's face speculum 7, the 5th plane mirror 8 behind first beam splitter 5, second beam splitter 6 respectively, and the adding of second harmonic mirror 9 has reduced the loss of 532nm green glow in resonant cavity.Like this, stimulated emission parameter, length according to laser crystal, parameters such as the effective nonlinear coefficient of frequency-doubling crystal, length and chamber length, waist radius, the theory that turns round simultaneously according to multiwavelength laser, reasonably control the ratio of three kinds of fundamental frequency light in the chamber, just obtained the equidirectional output simultaneously of red, green, blue tricolor laser.
In addition,, can start acoustooptic Q-switching 14, make continuous three-wavelength fundamental frequency light convert pulse laser to high repetition frequency and high-peak power for improving the power output of red, green, blue tricolor laser.
Laser crystal Nd
3+: the YAG10 doping content is 1.0at%, is of a size of Φ 3 * 10mm, and both ends of the surface are all plated the anti-reflection film of 946nm, 1319nm, 1064nm (transmitance is greater than 99.9%).
First frequency-doubling crystal 11, second frequency-doubling crystal 12, frequency tripling crystal 13 all adopt LBO I class angle coupling, are separately fixed on the two-dimentional adjustment rack, and size is 3 * 3 * 5mm
3, the side evenly smears silver powder and with putting into the water-cooling copper billet behind the indium foil parcel, the chilling temperature scope is at 16～22 ℃.Wherein the double-colored anti-reflection film of 946nm, 473nm (transmitance is greater than 99.9%) is all plated at first frequency-doubling crystal, 11 two ends, second frequency-doubling crystal, the 12 two ends plating double-colored anti-reflection film of 1319nm, 660nm (transmitance is greater than 99.9%), the frequency tripling crystal 13 two ends plating double-colored anti-reflection film of 1064nm, 532nm (transmitance is greater than 99.9%).
First beam splitter 5 and second beam splitter 6 and same optical axis of laser crystal and parallel placement, with horizontal forward angle be 135 °, be separately fixed on the two-dimensional adjustment frame.Be of a size of Φ=20mm, first beam splitter 5 wherein one side plates the 946nm film (reflectivity＞99.8%) that is all-trans, 1319nm, 1064nm and 473nm anti-reflection film (transmitance＞99.8%), another side plating 1319nm, 1064nm and 473nm anti-reflection film (transmitance＞99.8%); Second beam splitter 6 wherein one side plates the 1319nm film (reflectivity＞99.8%) that is all-trans, 1064nm and 660nm anti-reflection film (transmitance＞99.8%), another side plating 1064nm and 660nm anti-reflection film (transmitance＞99.8%).
Plano-concave total reflection end mirror 1 is fixed on the two-dimentional adjustment rack, and is coaxial with laser crystal, and the scope of choosing of its radius of curvature R is 50～100mm, and concave surface plates 946nm, 1319nm, 1064nm high-reflecting film (reflectivity is greater than 99.9%).First plane mirror 2, second plane mirror 3, the 3rd plane mirror 4 also are separately fixed on the two-dimentional adjustment rack, size is Φ=20mm, wherein first plane mirror 2, second plane mirror 3 be placed on respectively first beam splitter 5, second beam splitter 6 under, the 3rd plane mirror 4 is placed on the right-hand and coaxial with laser crystal 10 of second beam splitter 6.First plane mirror 2 is towards the one side plating double-colored high-reflecting film of 946nm, 473nm (reflectivity is greater than 99.8%) of resonant cavity, and another side is plated film not; Second plane mirror 3 is towards the one side plating double-colored high-reflecting film of 1319nm, 660nm (reflectivity is greater than 99.8%) of resonant cavity, and another side is plated film not; The 3rd plane mirror 4 is towards the one side plating 1064nm high-reflecting film (reflectivity is greater than 99.8%) and the 532nm anti-reflection film (transmitance is greater than 99.8%) of resonant cavity, and another side plates 532nm anti-reflection film (transmitance is greater than 99.8%).
Siping City's face speculum 7, the 5th plane mirror 8 are of a size of Φ=20mm, be separately fixed on the two-dimensional adjustment frame, and place respectively first beam splitter 5, second beam splitter 6 directly over, with 45 ° of placements of horizontal positive direction angle.Siping City's face speculum 7 one side is plated the 473nm film (reflectivity＞99.8%) that is all-trans, 946nm anti-reflection film (transmitance＞99.8%), and another side is plated film not; The 5th plane mirror 8 one side is plated the 660nm film (reflectivity＞99.8%) that is all-trans, 1319nm anti-reflection film (transmitance＞99.8%), and another side is plated film not.
Second harmonic mirror 9 places on the two-dimensional adjustment frame, is in same optical axis with laser crystal 10.1064nm anti-reflection film (transmitance＞99.8%) is all plated on the two sides, near the one side plating 532nm high-reflecting film (reflectivity＞99.8%) of frequency-doubling crystal.
Claims (5)
1, the tricolor laser device that turns round simultaneously of profile pump red, green, blue, comprise plano-concave total reflection end mirror (1), it is characterized in that, be disposed with acoustooptic Q-switching (14), laser crystal (10), first beam splitter (5), second beam splitter (6), second harmonic mirror (9), frequency tripling crystal (13), the 3rd plane mirror (4) on the horizontal optical path of incident plano-concave total reflection end mirror (1); One side towards first beam splitter (5) on the vertical optical path sets gradually first frequency-doubling crystal (11), first plane mirror (2), and the another side of first beam splitter (5) is provided with Siping City's face speculum (7); One side towards second beam splitter (6) on the vertical optical path sets gradually second frequency-doubling crystal (12), second plane mirror (3), and the another side of second beam splitter (6) is provided with the 5th plane mirror (8).
2, the tricolor laser device that turns round simultaneously of profile pump red, green, blue according to claim 1 is characterized in that the angle of inclination and the horizontal forward angle of first beam splitter (5), second beam splitter (6) are 135 °.
3, the tricolor laser device that turns round simultaneously of profile pump red, green, blue according to claim 1, it is characterized in that, first beam splitter (5) is mutually 90 ° with Siping City's face speculum (7), and second beam splitter (6) is mutually 90 ° with the 5th plane mirror (8).
4, the tricolor laser device that turns round simultaneously of profile pump high power red, green, blue according to claim 1, it is characterized in that plano-concave total reflection end mirror (1) constitutes resonant cavity with first plane mirror (2), the 3rd plane mirror (3), the 3rd plane mirror (4) respectively.
5, the tricolor laser device that turns round simultaneously of profile pump high power red, green, blue according to claim 1, it is characterized in that first frequency-doubling crystal (11), second frequency-doubling crystal (12), frequency tripling crystal (13) are a kind of, two or three crystal in the nonlinear optical crystals such as three lithium borate LBO, potassium titanium oxide phosphate KTP, beta-barium metaborate BBO, metaboric acid bismuth BIBO.
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| CN102522691A (en) * | 2011-12-31 | 2012-06-27 | 厦门大学 | Neodymium-doped continuous ultraviolet laser adopting linear cavity |
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| CN108306167A (en) * | 2018-01-22 | 2018-07-20 | 武汉安扬激光技术有限责任公司 | A kind of multichannel mode-locked all fibre resonant cavity |
| CN112467505A (en) * | 2020-12-14 | 2021-03-09 | 中国科学院合肥物质科学研究院 | Three-path coherent synthesis laser |
| CN112467505B (en) * | 2020-12-14 | 2024-04-02 | 中国科学院合肥物质科学研究院 | Three-way coherent synthesis laser |
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