CN101702488B - Color tuned laser - Google Patents
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- CN101702488B CN101702488B CN2009101977963A CN200910197796A CN101702488B CN 101702488 B CN101702488 B CN 101702488B CN 2009101977963 A CN2009101977963 A CN 2009101977963A CN 200910197796 A CN200910197796 A CN 200910197796A CN 101702488 B CN101702488 B CN 101702488B
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- 238000005859 coupling reaction Methods 0.000 claims abstract description 26
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- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 claims description 15
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- RIUWBIIVUYSTCN-UHFFFAOYSA-N trilithium borate Chemical class [Li+].[Li+].[Li+].[O-]B([O-])[O-] RIUWBIIVUYSTCN-UHFFFAOYSA-N 0.000 claims description 3
- 238000002834 transmittance Methods 0.000 claims description 2
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Abstract
A color tuning laser comprises a first cavity mirror, a first acousto-optic modulator, a second beam splitter, and a Nd-YVO4The laser comprises a laser crystal, a first beam splitter and an output coupling mirror, wherein the second beam splitter, the first beam splitter, a second cavity mirror, a second acousto-optic modulator, a polaroid, a first frequency doubling crystal, a third cavity mirror, a second flat cavity plate, a bismuth borate bicrystal, a first flat cavity plate, a second frequency doubling crystal, a fourth cavity plate, a beam combiner and a reflector form a first cavity, and the laser outputs three primary colors of red light, blue light and green light by utilizing two sub-cavities; the color tuning of independent adjustment of the light intensity ratio of green light, red light and blue light is realized by using a double acousto-optic delay modulation method; the effective length of the nonlinear conversion crystal is lengthened by adopting the double-resonance third harmonic and walk-off angle compensation technology, so that the nonlinear conversion crystal can be generatedThe blue light with high power solves the problems of film coating and crystal damage of the color tuned laser.
Description
Technical field
This patent belongs to laser, is a kind of color tuned laser that is used for the output red, green, blue three primary colors of laser television and large scale display.
Background technology
At present, be used for laser television, the LASER Light Source of large scale display etc. is red, blue, the green tricolor laser device with three separation basically entirely, realizes by closing bundle.For miniaturization, integrated, hope can realize colored adjustable LASER Light Source on a solid state device.One of common method be utilize the parametric oscillator of light in a device, produce three wavelength more separately frequency multiplication produce three primary colors light, this method can be accomplished more high-power, tuning also convenient, but complex structure and expense height are its shortcomings, another kind method is to satisfy under the certain condition to produce two simultaneously in a crystal, three kinds of wavelength, be converted into three primary colors again, the main difficulty that this mode runs into is the independent regulation of three primary colours light intensity, often in adjustment process, destroyed the scope that conditioned disjunction that each wavelength vibrates has simultaneously reduced independent regulation, in addition, on the plated film of realizing the polychrome film, also there are some difficulties.
Summary of the invention
The objective of the invention is to overcome the difficulty of above-mentioned prior art, a kind of color tuned laser is provided, this laser can be realized the independent regulation of ruddiness, green glow and output of blue light three primary colors and three primary colors light intensity, has solved the difficulty of plated film simultaneously.
Technical solution of the present invention is as follows:
A kind of color tuned laser, characteristics are that its formation comprises:
On a light path, set gradually the first chamber mirror, first sound-optic modulator, second beam splitter, Nd:YVO
4Laser crystal, first beam splitter and output coupling mirror, described second beam splitter is β with the acute angle that first beam splitter is become with described light path;
With described second beam splitter is minute surface, with the light path of the minute surface symmetry of the light path of the described first chamber mirror, first sound-optic modulator on by being that the second chamber mirror, second sound-optic modulator, polarizer are to described second beam splitter far and closely successively; Folded light beam direction at described first beam splitter is first frequency-doubling crystal and the 3rd chamber mirror successively, is the second plate cavity sheet, bismuth boracic acid bicrystal, the first plate cavity sheet, second frequency-doubling crystal and the 4th chamber sheet successively in the folded light beam direction of described output coupling mirror;
The described first chamber mirror, first sound-optic modulator, second beam splitter, Nd:YVO
4Laser crystal, first beam splitter, output coupling mirror, the second plate cavity sheet, bismuth boracic acid bicrystal, the first plate cavity sheet, second frequency-doubling crystal and the 4th chamber sheet are formed first v-shaped cavity, be 1342nm laser resonance, frequency multiplication and and chamber frequently, see through described output coupling mirror output 671nm and 447nm laser; The described first chamber mirror is the flat reflective mirror, and is high anti-to 1342nm; Described output coupling mirror, high anti-to 1342nm, high saturating to 671nm and 447nm; Described the 4th chamber mirror is a concave mirror, and is high anti-to 1342nm and 671nm; The right side of the described first plate cavity sheet is high saturating to 1342nm and 671nm, the left side is high saturating to 1342nm and 671nm, and it is high anti-to 447nm, the left side of the described second plate cavity sheet is high saturating to 1342nm, 447nm and 671nm, the right side is high saturating to 1342nm and 447nm, and is 80% to the light transmittance of 671nm
The described second chamber mirror, second sound-optic modulator, polarizer, second beam splitter, Nd:YVO
4Laser crystal, first beam splitter, first frequency-doubling crystal and the 3rd chamber mirror are formed second v-shaped cavity, and promptly 1064nm laser resonance and frequency doubling cavity see through described first beam splitter output 532nm laser; The described second chamber mirror is the flat reflective mirror, and is high anti-to 1064nm; Second beam splitter, high anti-to 1064nm, high saturating to 1342nm; Described first beam splitter, high anti-to 1064nm, high saturating to 1342nm, 532nm; Described the 3rd chamber mirror, high anti-to 1064nm and 532nm;
At described output coupling mirror output 671nm and 447nm laser-transmitting light direction bundling device is set;
At the 532nm of described first beam splitter laser-transmitting light direction speculum is set, described 532nm laser-bounce is exported with described 671nm and 447nm laser by described bundling device by this speculum.
Described Nd:YVO
4Crystal comprises profile pump or end pumping by laser diode array pumping.
Described first sound-optic modulator and second sound-optic modulator, coming modulation wavelength by the modulated RF power supply respectively is λ
1=1342nm and λ
2=1064nm light is driven by same modulation electric pulse signal, and this signal source is two tunnel output synchronizing signals, the pulse daley Δ T between the two-way modulation signal, and Δ T is adjustable, then exports λ during Δ T=0 simultaneously
1And λ
2
Described first frequency-doubling crystal is KTP (KTP) crystal, is 532nm with the 1064nm optical sccond-harmonic generation;
Described second frequency-doubling crystal is three lithium borates (LBO) crystal, is 671nm with the 1342nm optical sccond-harmonic generation.
Described bismuth boracic acid bicrystal is by a pair of crystal orientation cut direction and the identical bismuth boracic acid crystal of size, and one of them is docking together after 180 ° of a of bismuth boracic acid crystal axle counter-rotatings constitutes, with the compensation deviation angle.
The span of the acute angles beta that described second beam splitter and first beam splitter are become with described light path is 5 °≤β≤15 °.
Technique effect of the present invention:
1, utilize alliteration light delay modulator approach to obtain three primary colors light, it can weaken same fast laser crystal (as Nd:YVO
4, the strong competitive effect that produces when Nd:YAG) when same energy level, sending several wavelength light, and realization is to the purpose of every kind of its light intensity of wavelength independent regulation.Under the condition that satisfied narrower several wavelength vibrate simultaneously, can also when Δ T=0, produce three three primary colors light of vibration simultaneously.
2, the present invention has utilized two sub-chambeies respectively to produce red blue pulsed light and the green glow of 671+447, so respectively independent regulation green glow light intensity and regulate ratio red, that blue light is strong and reach color tuned purpose.Rotatory polarization sheet scalable 1064 light intensities are because Nd:YVO
4Output be linearly polarized light, rotate the second frequency-doubling crystal LBO I (is with the light beam axle) can change o (ω) with e (2 ω) thus ratio regulate the strong ratio of red blue light.The such branch chamber of employing has also reduced the technostress to chamber sheet crystal plated film, technical easier realization greatly.
3, usually practical three primary colors light THIRD-HARMONIC GENERATION blue light carries out outside the chamber, because of single just by process, so must gather focal spot very little, the easy like this crystal damage that causes, this is a big shortcoming.The present invention has adopted double resonance triple-frequency harmonics (be actually second harmonic adds once and frequently) to produce 447nm light scheme, utilize the double resonance triple-frequency harmonics, carry out in the chamber, hot spot allows bigger, therefore can produce more powerful blue light, also solve the crystal damage problem.
4, the present invention has also adopted the deviation angle compensation technique, and blue light is a weakest link among the present invention, utilizes a crystal segmentation cutting to place, and can compensate deviation angle, the effective length of the non-linear conversion crystal that extended.
Description of drawings
Fig. 1 is the light channel structure schematic diagram of color tuned laser of the present invention.
Fig. 2 is an accent Q oscillogram,
Fig. 2 (a) is the waveform of modulation signal, the corresponding laser pulse shape figure of Fig. 2 (b)
Fig. 3 is a transfer process key diagram red in the color tuned laser of the present invention, blue, green each coloured light
Fig. 4 is the light channel structure figure of an embodiment of color tuned laser of the present invention
Embodiment
The invention will be further described below in conjunction with embodiment and accompanying drawing, but should not limit protection scope of the present invention with this.
See also Fig. 1 earlier, Fig. 1 is the structural representation of color tuned laser of the present invention.As seen from the figure, color tuned laser of the present invention, its formation comprises:
On a light path, set gradually the first chamber mirror 8, first sound-optic modulator 2, second beam splitter 18, Nd:YVO
4Laser crystal 1, first beam splitter 10 and output coupling mirror 12, described second beam splitter 18 is β with the acute angle that first beam splitter 10 is become with described light path;
With described second beam splitter 18 is minute surface, with the light path of the minute surface symmetry of the light path of the described first chamber mirror 8, first sound-optic modulator 2 on by being that the second chamber mirror 9, second sound-optic modulator 3, polarizer 19 are to described second beam splitter 18 far and closely successively; Folded light beam direction at described first beam splitter 10 is first frequency-doubling crystal 4 and the 3rd chamber mirror 11 successively, is the second plate cavity sheet 15, bismuth boracic acid bicrystal 6,7, the first plate cavity sheet 14, second frequency-doubling crystal 5 and the 4th chamber sheet 13 successively in the folded light beam direction of described output coupling mirror 12;
The described first chamber mirror 8, first sound-optic modulator 2, second beam splitter 18, Nd:YVO
4Laser crystal 1, first beam splitter 10, output coupling mirror 12, the second plate cavity sheet 15, bismuth boracic acid bicrystal 6,7, the first plate cavity sheet 14, second frequency-doubling crystal 5 and the 4th chamber sheet 13 are formed first v-shaped cavity, be 1342nm laser resonance, frequency multiplication and and chamber frequently, see through described output coupling mirror 12 output 671nm and 447nm laser; The described first chamber mirror 8 is the flat reflective mirror, and is high anti-to 1342nm; Described output coupling mirror 12, high anti-to 1342nm, high saturating to 671nm and 447nm; Described the 4th chamber mirror 13 is a concave mirror, and is high anti-to 1342nm and 671nm;
The described second chamber mirror 9, second sound-optic modulator 3, polarizer 19, second beam splitter 18, Nd:YVO
4Laser crystal 1, first beam splitter 10, first frequency-doubling crystal 4 and the 3rd chamber mirror 11 are formed second v-shaped cavity, and promptly 1064nm laser resonance and frequency doubling cavity see through described first beam splitter, 10 output 532nm laser; The described second chamber mirror 9 is the flat reflective mirror, and is high anti-to 1064nm; Second beam splitter 18, high anti-to 1064nm, high saturating to 1342nm; Described first beam splitter 10, high anti-to 1064nm, high saturating to 1342nm, 532nm; Described the 3rd chamber mirror 11, high anti-to 1064nm and 532nm;
At described output coupling mirror 12 output 671nm and 447nm laser-transmitting light direction bundling device 17 is set;
532nm laser-transmitting light direction at described first beam splitter 10 is provided with speculum 16, by this speculum 16 described 532nm laser-bounce is exported with described 671nm and 447nm laser by described bundling device 17.
Described Nd-doped yttrium vanadate (Nd:YVO
4) the 1st, laser diode pumping Nd:YVO
4Laser module, the Nd:YVO of activation
4Crystal is from same upper state
4F
3/2Transition can produce many spectral lines
4F
3/2→
4I
11/2(1064nm),
4F
3/2→
4I
13/2(1342nm) etc., this laser module has become commodity and can buy.Structure this paper to it does not do too much description.The branch that profile pump and end pumping are generally arranged is generally used profile pump under high-power situation.Comprise laser diode (L D) array (light beam focuses on from crystal on side face and injects crystal) Nd:YVO in this module
4Crystal also has cooling structure (generally using water cooling).
First sound-optic modulator 2 and second sound-optic modulator 3, coming modulation wavelength by modulated RF power supply (not shown) respectively is λ
1=1342nm and λ
2=1064nm light is driven by same modulation electric pulse signal, and this signal source is two tunnel output synchronizing signals, the pulse daley Δ T between the two-way modulation signal, and Δ T is adjustable, then exports λ during Δ T=0 simultaneously
1And λ
2.
Described first frequency-doubling crystal 4 is KTP (KTP) crystal, is 532nm with the 1064nm optical sccond-harmonic generation; Described second frequency-doubling crystal 5 is three lithium borates (LBO) crystal, is 671nm with the 1342nm optical sccond-harmonic generation.
Described bismuth boracic acid bicrystal the 6, the 7th is by a pair of crystal orientation cut direction and the identical bismuth boracic acid crystal of size, one of them is docking together after 180 ° of a of bismuth boracic acid crystal axle counter-rotatings constitutes, place according to e light compensated birefringence mode, with compensation deviation angle (referring to J.O.S.A B/V0L 11NO.121994P2368), this crystal is used for 1342nm and 671nm and conversion frequently, owing to used two BIBO crystal, improved greatly and the frequency conversion efficiency.
The span of the acute angles beta that described second beam splitter 18 and first beam splitter 10 are become with described light path is 5 °≤β≤15 °.
Fig. 2 transfers the Q oscillogram, Fig. 2 (a) is the waveform of modulation signal, last figure is the electric pulse waveform that is added on the first sound-optic modulator 2, figure below is the electric pulse figure that is added on the first sound-optic modulator 3, two signals are synchronous, postpone Δ T, corresponding laser pulse such as Fig. 2 (b), the corresponding 1342nm first-harmonic of first pulse or ruddiness+blue light, corresponding 1064nm first-harmonic of second pulse or green glow, both postpone Δ T ', the corresponding again 1342nm first-harmonic of the 3rd pulse, and its appearance is than second pulse, 1064 light delay T-Δ T '.Wherein T is modulation period, (T-Δ T ') in the time owing to do not have light, last energy level
4F
3/2Population is restored under strong pumping, and when be about upper level lifetime time of delay, the last energy level of pumping can be near saturated, and last like this pulse exerts an influence hardly to back one pulse, at Nd:YVO
4In, the transition cross section that produces 1064 light is almost 2 times of 1342 light, therefore 1064 light of surging vibration only, but by the ratio may command generation 1064nm and the last energy level population recovery extent that produce 1342nm laser of adjusting Δ T with T-Δ T, along with (T-Δ T)/Δ T increases, the luminous enhancing of 1342nm and 1064nm luminescent decay.Suitably select the chamber loss (reflectivity) of two kinds of wavelength light in addition, also can make two wavelength be in the district of vibration simultaneously, therefore just can regulate Δ T → 0, make the luminous and luminous vibration simultaneously of 1064nm 2 wavelength of 1342nm wavelength.
The color of output light by regulate three coloured light strong realize that recently 19 among Fig. 1 is polarizers, rotate that this polarizer 19 can change the 1064nm light intensity and the light intensity that changes green glow.Same rotate the ratio that second frequency-doubling crystal 5 (LBO) can change ruddiness 671nm and first-harmonic 1342nm light intensity, thereby change the ratio of 671nm and 447nm light intensity.Therefore adopted this light path, colour can more independently be regulated.Transfer process red, blue, green each coloured light can be represented with Fig. 3.At first see by the second chamber mirror 9, second beam splitter 18, second v-shaped cavity that first beam splitter, 10 to the 3rd chamber mirrors 11 constitute, this chamber produces resonance to 1064nm light, after the first frequency-doubling crystal 4KTP frequency multiplication, produce 2 ω light (532nm), generation and transmission route are shown in double-head arrow, and the 532nm light of two-way generation to the right left is by 10 outputs of first beam splitter.In this structure from Nd:YVO
4The first-harmonic polarised light that comes out, the polarization direction (annotate:
Following coordinate is three main shafts of the dielectric ellipsoid of crystal) all at 45 with the o light and the e light direction of ktp crystal.Be complementary angle θ=90 °,
, the frequency multiplication process is:
1064nm(e)+1064nm(o)＝532nm(e)
Primary flat is the XY plane, and e light is walked from just in this plane, and 532 is e light, and deviation angle is 4.15mrad, can prove and adopt the second v-shaped cavity structure, and the deviation angle of 2 ω light of forward-propagating and reverse propagation has obtained compensation.
First chamber mirror 8-output coupling mirror 12-the 4th chamber mirror 13 that is all-trans by 1342nm among the figure has constituted λ
1First v-shaped cavity of=1342nm, second frequency-doubling crystal, 5 frequencys multiplication by I class phase matched in the chamber become 671nm light, and the frequency multiplication process is:
1342nm(e)+1342nm(e)＝671nm(o)
E light deviation angle is 3.45mrad, and matching direction is θ=86.1 °,
Primary flat is the XZ plane, and the orientation of oscillation of first-harmonic (1342nm) that makes vibration is at the e of LBO light direction, and then the frequency multiplication of outgoing (671nm) is an o light.E light deviation angle direction in the XZ plane (as Fig. 3), LBO I class coupling is compared with ktp crystal II class coupling, though d
EffLittler than the latter, but because of deviation angle is little, useful length can be longer, so still select LBO I class coupling.In this sub-chamber, the ruddiness that LBO produces and the fundamental wave (1342nm) of resonance produce the blue light of 447nm with frequency in the BIBO crystal, and its process is:
1342nm(o)+671nm(e)＝447nm(e)
The angle matching direction is θ=90 °
, primary flat is the XY plane, the deviation angle of blue light is 15.94mrad, walk from light on this plane.Its d
Eff=-2pm/V.Also can select lbo crystal to produce in addition and the frequency process:
1342nm(o)+671nm(e)＝447nm(e)
The blue light deviation angle is 11.65mrad, its d
Eff=0.816pm/v.Two kinds of crystal are compared the d of BIBO
EffBig more a lot of than LBO, though deviation angle is bigger than LBO, if adopt the method for deviation angle compensation, BIBO is obvious still more better.Adopt two same BIBO crystal with crystal around 180 ° (X-axis is a axle of the BIBO on the crystallography) of X-axis counter-rotating.Therefore utilize bicrystal can remedy the big shortcoming of deviation angle, also placed a pair of first surface plate speculum 14 in this sub-chamber of external 1342, the second surface plate speculum 15 constitutes an additional feedback chamber, realize the resonance (as double-head arrow among Fig. 3) of 2 ω ripples (671nm), produce like this and utilized double resonance (ω and 2 ω) that the timing output and the light (2 ω and ω) of inverse time output are all utilized in 3 ω (447nm) process, strengthened the transfer ratio of 3 ω (447).
Fig. 4 is the light channel structure figure of an embodiment of color tuned laser of the present invention
Adopt the Nd:YVO of end face LD pumping
4Laser, concrete structure such as Fig. 4, among the figure:
1, be the Nd-doped yttrium vanadate crystal (Nd:YVO of neodymium-doped 0.3%
4), be of a size of 3 * 3 * 8, a cutting, first-harmonic be to get the ⊥ horizontal plane in this device of polarised light (∏ direction).
21, be the beam shaping focusing system of optical fiber coupling output laser diode LD
20, high saturating to 808nm for beam splitting chip HT (808nm) expression, HR (1342) expression is high anti-to 1342nm, below identical, pardon no longer explanation.
8, the first chamber mirrors, total reflective mirror, HR (1342nm) is at the 1064 transmitance T of place＞50%
9, the second chamber mirrors, total reflective mirror, HR (1064nm)
18, the second beam splitters, HR (1064), HT (1342nm),
10, the first beam splitters are 532nm outgoing mirror and 1064nm high reflective mirror.Right side HR (1064nm) HT (1342nm, 532nm) left side HT (1342nm, 532nm).
11, the three chamber mirrors, concave surface HR speculum (1064nm) HR (532nm)
12, output coupling mirror is frequency multiplication 671nm and and the outgoing mirror of 447nm frequently.The right side is a concave surface, and radius of curvature is 100mm.(447nm, 671nm) HR (1342nm) left side is a convex surface to concave surface HT, HT (447nm, 671nm) radius of curvature 34.5mm
13, the four chamber mirrors, completely reflecting mirror, concave surface HR (1342nm, 671nm)
14, the first plate cavity sheets, right side HT (1342,671) left side HT (1342,671) HR (447)
15, the second plate cavity sheets, the right HT of left HT (1342) HT (447,671) (1342,447) R (671) ≈ 80%
22, total reflective mirror, HR (532)
23, light combination mirror HR (532) HT (447,671)
2,3, first sound-optic modulator and second sound-optic modulator, modulation signal is exported by same drive source pulse generator two tunnel adjustable delaies (Δ T)
4, the first frequency-doubling crystals, the KTPII:1064nm frequency-doubling crystal, 3 * 3 * 5, o light e light direction of beam propagation at 45 (direction is complementary) θ=90 of 1064nm first-harmonic polarization and KTP °,
The II class is complementary
5, the second frequency-doubling crystals, LBO I:1342nm frequency-doubling crystal, the I class is complementary, e light direction ⊥ horizontal plane, o light is in horizontal plane (XY).3 * 3 * 12, optical direction θ=86.1 °
6,7, a pair of twin BIBO crystal, optical direction θ=90 °
, II class coupling 3 * 3 * 8, primary flat be XY first-harmonic 1342nm oscillation light polarization direction be the o light direction 671nm frequency doubled light of BIBO at the e of crystal light direction, o light ⊥ horizontal plane (1342nm), e light is (671nm) on horizontal plane XY.Adopt 2 to be in order to compensate the deviation angle of e light, two cuttings are just the same just ° places for the axle Rotate 180 by e light vector direction second.BIBO II puts into the chamber and is compensated, outside blue light conversion efficiency and the chamber single by the time compare and can have 4
2=16 times enhancing.(effective length increases by 2 times, puts into the chamber and increases 2 times back and forth again, conversion efficiency ∝ (d
Eff* L)
2So should have 4
2Multiplication is strong)
Experiment shows that the present invention has following technique effect:
1, utilize dual-acousto-optic to postpone modulator approach and obtain three primary colours light, it can weaken same fast laser crystal (such as Nd:YVO4, the strong competitive effect that produces when Nd:YAG) when same energy level, sending several wavelength light, and the purpose of its light intensity is independently regulated in realization to every kind of wavelength. Under the condition that satisfied narrower several wavelength vibrate simultaneously, can also when Δ T=0, produce three simultaneously three primary colours light of vibration.
2, the present invention has utilized two sub-chambeies respectively to produce red blue pulsed light and the green glow of 671+447, can independently regulate respectively like this green glow light intensity and regulate ratio red, that blue light is strong to reach color tuned purpose. The rotatory polarization sheet can be regulated 1064 light intensities, because Nd:YVO4Output be linearly polarized light, rotate that the second frequency-doubling crystal LBO I (take light beam as axle) can change o (ω) and e (2 ω) thus ratio regulate the strong ratio of red blue light. The such branch chamber of employing has also reduced the technostress to chamber sheet crystal plated film, technical easier realization greatly.
3, usually practical three primary colours light THIRD-HARMONIC GENERATION blue light carries out outside the chamber, because of single just by process, so must gather focal spot very little, the so easy crystal damage that causes, this is a big shortcoming. The present invention has adopted double resonance triple-frequency harmonics (be actually second harmonic adds once and frequently) to produce 447nm light scheme, utilize the double resonance triple-frequency harmonics, carry out in the chamber, hot spot allows bigger, therefore can produce more powerful blue light, also solve the crystal damage problem.
4, the present invention has also adopted the deviation angle compensation technique, and blue light is weakest link among the present invention, utilizes a crystal segmentation cutting to place, and can compensate deviation angle, has lengthened the effective length of non-linear conversion crystal.
Claims (6)
1. color tuned laser is characterised in that its formation comprises:
On a light path, set gradually the first chamber mirror (8), first sound-optic modulator (2), second beam splitter (18), Nd:YVO
4Laser crystal (1), first beam splitter (10) and output coupling mirror (12), described second beam splitter (18) is β with the acute angle that first beam splitter (10) is become with described light path;
With described second beam splitter (18) is minute surface, with the light path of the minute surface symmetry of the light path of the described first chamber mirror (8), first sound-optic modulator (2) on by being the second chamber mirror (9), second sound-optic modulator (3), polarizer (19) far and closely successively; Folded light beam direction at described first beam splitter (10) is first frequency-doubling crystal (4) and the 3rd chamber mirror (11) successively; Folded light beam direction at described output coupling mirror (12) is the second plate cavity sheet (15), bismuth boracic acid bicrystal (6,7), the first plate cavity sheet (14), second frequency-doubling crystal (5) and the 4th chamber sheet (13) successively;
The described first chamber mirror (8), first sound-optic modulator (2), second beam splitter (18), Nd:YVO
4Laser crystal (1), first beam splitter (10), output coupling mirror (12), the second plate cavity sheet (15), bismuth boracic acid bicrystal (6,7), the first plate cavity sheet (14), second frequency-doubling crystal (5) and the 4th chamber sheet (13) are formed first v-shaped cavity, be 1342nm laser resonance, frequency multiplication and and chamber frequently, see through described output coupling mirror (12) output 671nm and 447nm laser; The described first chamber mirror (8) is the flat reflective mirror, and is high anti-to 1342nm; Described output coupling mirror (12), high anti-to 1342nm, high saturating to 671nm and 447nm; Described the 4th chamber mirror (13) is a concave mirror, and is high anti-to 1342nm and 671nm; The right side of the described first plate cavity sheet (14) is high saturating to 1342nm and 671nm, the left side is high saturating to 1342nm and 671nm, and it is high anti-to 447nm, the left side of the described second plate cavity sheet (15) is high saturating to 1342nm, 447nm and 671nm, the right side is high saturating to 1342nm and 447nm, and is 80% to the light transmittance of 671nm;
The described second chamber mirror (9), second sound-optic modulator (3), polarizer (19), second beam splitter (18), Nd:YVO
4Laser crystal (1), first beam splitter (10), first frequency-doubling crystal (4) and the 3rd chamber mirror (11) are formed second v-shaped cavity, and promptly 1064nm laser resonance and frequency doubling cavity see through described first beam splitter (10) output 532nm laser; The described second chamber mirror (9) is the flat reflective mirror, and is high anti-to 1064nm; Second beam splitter (18), high anti-to 1064nm, high saturating to 1342nm; Described first beam splitter (10), high anti-to 1064nm, high saturating to 1342nm, 532nm; Described the 3rd chamber mirror (11), high anti-to 1064nm and 532nm; At described output coupling mirror (12) output 671nm and 447nm laser-transmitting light direction bundling device (17) is set;
532nm laser-transmitting light direction at described first beam splitter (10) is provided with speculum (16), by this speculum (16) described 532nm laser-bounce is exported with described 671nm and 447nm laser by described bundling device (17).
2. color tuned laser according to claim 1 is characterized in that described Nd:YVO
4Crystal (1) comprises profile pump or end pumping by laser diode array pumping.
3. color tuned laser according to claim 1 is characterized in that described first sound-optic modulator (2) and second sound-optic modulator (3), and coming modulation wavelength by the modulated RF power supply respectively is λ
1=1342nm and λ
2=1064nm light is driven by same modulation electric pulse signal, and this signal source is two tunnel output synchronizing signals, the pulse daley Δ T between the two-way modulation signal, and Δ T is adjustable, then exports λ during Δ T=0 simultaneously
1And λ
2
4. color tuned laser according to claim 1 is characterized in that described first frequency-doubling crystal (4) is KTP (KTP) crystal, is 532nm with the 1064nm optical sccond-harmonic generation; Described second frequency-doubling crystal (5) is three lithium borates (LBO) crystal, is 671nm with the 1342nm optical sccond-harmonic generation.
5. color tuned laser according to claim 1, it is characterized in that described bismuth boracic acid bicrystal (6,7) is by a pair of crystal orientation cut direction and the identical bismuth boracic acid crystal of size, one of them is docking together after 180 ° of a of bismuth boracic acid crystal axle counter-rotatings constitutes, with the compensation deviation angle.
6. color tuned laser according to claim 1, the span that it is characterized in that the acute angles beta that described second beam splitter (18) and first beam splitter (10) are become with described light path are 5 °≤β≤15 °.
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| CN2009101977963A CN101702488B (en) | 2009-10-28 | 2009-10-28 | Color tuned laser |
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| CN106654845B (en) * | 2016-11-28 | 2023-05-09 | 济南晶众光电科技有限公司 | Integrated electro-optic Q-switch |
| CN108963741B (en) * | 2018-09-21 | 2019-10-18 | 深圳市杰普特光电股份有限公司 | Bicrystal green (light) laser |
| CN117673883A (en) * | 2024-01-31 | 2024-03-08 | 西安晟光硅研半导体科技有限公司 | Blue light solid laser |
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