CN1016301B - Laser device made from aluminium-yttrium-neodymium tetraborate monocrystal - Google Patents

Laser device made from aluminium-yttrium-neodymium tetraborate monocrystal

Info

Publication number
CN1016301B
CN1016301B CN 89102343 CN89102343A CN1016301B CN 1016301 B CN1016301 B CN 1016301B CN 89102343 CN89102343 CN 89102343 CN 89102343 A CN89102343 A CN 89102343A CN 1016301 B CN1016301 B CN 1016301B
Authority
CN
China
Prior art keywords
laser
light source
incoherent light
crystal
monocrystal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
CN 89102343
Other languages
Chinese (zh)
Other versions
CN1046414A (en
Inventor
邱闽旺
黄奕川
江爱栋
罗遵度
陈�光
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujian Institute of Research on the Structure of Matter of CAS
Original Assignee
Fujian Institute of Research on the Structure of Matter of CAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fujian Institute of Research on the Structure of Matter of CAS filed Critical Fujian Institute of Research on the Structure of Matter of CAS
Priority to CN 89102343 priority Critical patent/CN1016301B/en
Priority to JP2069935A priority patent/JPH0666502B2/en
Priority to US07/505,022 priority patent/US5058118A/en
Publication of CN1046414A publication Critical patent/CN1046414A/en
Publication of CN1016301B publication Critical patent/CN1016301B/en
Expired legal-status Critical Current

Links

Images

Landscapes

  • Lasers (AREA)

Abstract

The present invention provides a small-size laser device with a complex function of a laser and a nonlinear effect. A self-frequency multiplication laser crystal which is used in the device is an NYAB (NdxY (1x) Al3 (BO3) 4) (X is from 0.03 to 0.08) monocrystal, the threshold value is low, and the efficiency is high. A common flash lamp is used as a pump source, namely that 1.320 mu m and 1.064 mu m of fundamental wave lasers which are transmitted by the self of the common flash lamp are respectively converted into 0.660 mu m and 0.532 mu m of visible lasers in a frequency multiplication mode. The processing precision requirement of a referred optical element of the device is not rigorous.

Description

Laser device made from aluminium-yttrium-neodymium tetraborate monocrystal
The present invention sets forth the composite functional material Nd that a kind of usefulness has laser and nonlinear effect xY 1-xAl 3(BO 3) 4(X=0.03-0.08) Laser Devices of crystal manufacturing.
Along with laser technology and application and development, people are thirsting for a kind of appearance that laser activity has the composite functional material of nonlinear effect again that has, thereby the crystalline material of direct emission visible laser and the research of device thereof are produced great interest.Before the seventies, though the U.S. and Soviet Union scientist have reported at LiNbO 3Mix Tm in the crystal 3+And Nd 3+Ion obtains the research work of multifunctional crystal, and uses Nd 3+: LiNbO 3Crystal has been carried out the self-frequency-doubling laser experiment.But because this crystal mixes electricity price and the unmatched Nd of ionic radius 3+After, the optical homogeneity variation, thereby fail to enter application.Nineteen eighty-three, Soviet Union scientist succeeded in developing Nd 0.2Y 0.8Al 3(BO 3) 4Multifunctional crystal, and realized laser self-frequency-doubling's effect from 1.32 μ m to 0.66 μ m.Crystalline material research institute of Shandong University went out Nd with molten-salt growth in 1986 xY 1-xAl 3(BO 3) 4(X=0.05-0.15) crystal, with the 587.8nm wavelength laser of tunable dye laser as driving source, realized that this crystal is with stimulated emission and the self-frequency-doubling laser running of 1.06 μ m to 0.53 μ m, but, this usefulness one playscript with stage directions body just can be tuned to 0.53 μ m(and, the output energy is bigger) laser come excited crystal, to obtain the device of double-frequency laser output, how many practical values not.
The present inventor has furtherd investigate the structure of this material and the relation between the performance, find that it is a kind of very desirable self-frequency doubling laser crystal material, its binding energy is big, makes it have very big hardness that therefore bigger thermal conductivity and good physical and chemical stability are also arranged, and not because of mixing Nd 3+Produce the inhomogeneity reduction of crystal optics, have weak concentration quenching effect again, thereby allow to mix more Nd 3+Ion, this is that the microminiature requirement on devices has bigger gain coefficient necessary.
The present inventor has revised nonlinear coupled equation according to laser self-frequency-doubling's concrete experiment condition, has studied crystal bar length and Nd 3+The relation of doping content and shg efficiency, the scope of having determined the X value is X=0.03-0.08.
The objective of the invention is with high efficiency laser self frequency-doubling crystal's material NYAB is Nd xY 1-xAl 3(BO 3) 4Make and can supply the small practical Laser Devices, its dominant wavelength is at 0.532 μ m place.
The object of the present invention is achieved like this: use Nd xY 1-xAl 3(BO 3) 4(X=0.03-0.08) monocrystal laser self-frequency-doubling operation material is made pumping source with incoherent light source, produces the laser of 0.532 mum wavelength.This incoherent light source can be small-sized straight lamp, also can be light-emitting diode, and operating state can be pulse, also can be continuous.Can be xenon lamp, also can be krypton lamp.This monocrystal can also can cut into the laser bar of different size by the direction that is complementary of II class by the I class.Incoherent light source as pumping source can be placed on the laser bar sidepiece, also can be placed on the end of laser bar.
The inventor finds at Nd through lot of experiments xY 1-xAl 3(BO 3) 4In the monocrystalline, when the X value was 0.030 to 0.080, laser self-frequency-doubling's effect was better, had at this moment grown and had mixed Nd 3+Evenly reach the crystal of the good large-size of optical quality, this crystal is by the laser output that laser bar that direction cuts into different size can both produce 0.532 mum wavelength that is complementary of I class and II class, is by be complementary about four times of frequency multiplication light intensity of direction cutting of II class approximately by the be complementary frequency multiplication light intensity of laser bar of direction cutting of I class wherein.
Nd xY 1-xAl 3(BO 3) 4(X=0.03-0.08) structure of monocrystal belongs to trigonal system, space group is R 32, negative single shaft crystalline substance.a＝b＝9.293 ，c＝7.245 。It exists the two classes mode that is complementary: I class and II class, so-called position are complementary and are meant that fundamental frequency satisfies be concerned with enhancing condition, i.e. △ K=0(K=(nw)/(c) with frequency doubled light on the specific direction of crystal) (wherein K is a wave vector; N is the refractive index of respective wavelength; C is the light velocity; 1. be circular frequency) under coaxial position is complementary condition, the direction of propagation conllinear of fundamental frequency light and frequency doubled light, thus △ K=0, so have
(1) to I saphe matching way (O ' O → e)
No w＝Ne 2w（θ Ⅰm）
(2) to II saphe matching way (O ' e → e)
No wNe w（θm Ⅱ）＝2Ne 2w（θm Ⅱ）
The report of people such as Liu Enquan [" optics journal " Vol.7No.2, p139-142] is seen in the derivation of detail.The effective nonlinear coefficient of this crystal is:
X Ⅰ eff＝F 2（θ Ⅰm，ψ，d 11）＝d c 11cosθ mCos3ψ
X Ⅰ eff＝F 1（θ Ⅱm，ψ，d 11）＝d 11cosθ mSin3ψ
D wherein 11Be the non linear coefficient of this crystal, ψ is the azimuth of crystal to a axle, and θ m is I class and II class phase matching angle.
And try to achieve: N w 0=1.7553; N w e=1.6869;
N w 0＝1.7808; N w e＝1.7050;
θ m＝32°54′ θ Ⅱ m＝51°2′
And when ψ=n (π)/3; X I EffMaximum is arranged
X Ⅰ eff＝0.8235d 11X Ⅱ eff＝0.4032d 11
X Ⅰ eff＝2.04X Ⅱ eff
Because square being directly proportional of frequency multiplication light intensity and effective nonlinear coefficient is so the frequency multiplication light intensity that the I class is complementary is 4 times that the II saphe is mated intensity.
The present inventor also finds Nd xY 1-xAl 3(BO 3) 4The physical and chemical performance of (X gets 0.03-0.08) crystal is good, and hardness is big, deliquescence not, and cleavage not can strong alkali-acid resistance, and optical homogeneity is good, and anti-damage ability is strong, and bigger thermal conductivity is arranged.This is to be better than LiNbO 3The place of crystal, and be can normally use for a long time and the working-laser material that can not damage or make performance to reduce.Simultaneously, its threshold value is low, can be with common photoflash lamp as pumping source.This pumping source can be an incoherent light source, and near 588nm, 748nm, 807nm place, have at least a place that emission peak is arranged, near these above-mentioned three wavelength emission peak is strong more, and then the operating efficiency of crystal is just high more, and krypton lamp, xenon lamp commonly used at present all is pumping source preferably.When pumping source was worked with pulse mode, emitting laser was a pulsed; When the pumping source working method is continuous, then emitting laser also is continuous.And along with the increase of pump energy, the energy of laser output rises rapidly.The angle of divergence that we have recorded laser beam is θ 2.3mrad, and laser is output as linearly polarized photon, and collimation is good.
Description of drawings:
Accompanying drawing 1 is the schematic diagram of embodiment one;
Accompanying drawing 2 is schematic diagrames of embodiment two;
Accompanying drawing 3 is schematic diagrames of embodiment three.
The present invention is described further with accompanying drawing in conjunction with the embodiments more below.
Embodiment one:
As the device of accompanying drawing 1,1. be Nd xY 1-xAl 3(BO 3) 4(X=0.03-0.08) laser crystal bar; 2. be the straight tube xenon lamp; 3. be dielectric mirror to 1.06 μ m and 0.53 μ m total reflection; 4. be the dielectric mirror of crossing to 1.06 mum wavelength total reflections and to 0.53 mum wavelength full impregnated; 5. be optical filtering, it is to 1.06 mum wavelength total reflections, to 0.53 mum wavelength full impregnated mistake; 6. be the LPE-1A laser energy meter; 7. be pulse laser power supply; 8. be laser pump cavity, be single elliptic cavity, on the focus that laser bar and pump light source are placed in one respectively.The major axis 2a=10mm of this list elliptic cavity, minor axis are 2b=8.6mm, e=(c)/(a)=0.51, and with brass processing, inboard polishing is silver-plated.
The LPE-1A energy meter is used for Laser Measurement output energy.
If the pulse xenon flash lamp is changed into repetition rate xenon flash lamp or continuous luminous krypton lamp, then can make repetition rate or continuous NYAB[Nd xY 1-xAl 3(BO 3) 4] solid state laser.At this moment preferably assemble cooling device, as all achieving the goal with water-cooled, air-cooled or conductor refrigeration.
Embodiment two:
As the device of accompanying drawing 2, wherein 1. be Nd xY 1-xAl 3(BO 3) 4(X=0.03-0.08) laser crystal bar; 2. be light emitting diode matrix.At laser bar side plated film,, laser pump cavity is omitted to assemble pump light; 3. be dielectric mirror to 0.53 mum wavelength total reflection of 1.06 mum wavelengths; 4. be the dielectric mirror that 1.06 mum wavelength total reflections are crossed 0.53 mum wavelength full impregnated.
Embodiment three:
As the device of accompanying drawing 3, wherein 1. be Nd xY 1-xAl 3(BO 3) 4(X=0.03-0.08) laser crystal bar; 2. be the high strength light-emitting diode; 3. be to 1.06 μ m and 0.53 mum wavelength total reflection and to 8000
Figure 89102343_IMG4
-8100
Figure 89102343_IMG5
Wave-length coverage has the deielectric-coating of high permeability, can directly be plated on the crystal end-face; 4. be to 1.06 mum wavelength total reflections, the output medium mirror to 0.53 mum wavelength full impregnated is crossed also can directly be plated in deielectric-coating on the end face of this laser bar; 5. be that telescopic system is to adjust the aperture and the collimation of pump beam.
What need further specify is requirement to laser bar, and flatness is less than 1/4 aperture; Fineness is the V level; Perpendicularity was less than 20 seconds, and the depth of parallelism was less than 10 seconds, and this is can both accomplish in the general optical precision processing technology.
Embodiment four:
The present inventor carries out parameter measurement with the NYAB laser bar of ψ 3mm * 25mm xenon flash lamp as pumping source excitation ψ 3.5mm * 12.16mm with instruments such as LPE-1A type laser energy meter and Tektronix466 storage oscilloscopes, and its specific targets are as follows:
Laser threshold :～57.3mJ
Laser output :～3mJ(transfers Q)
Pulse duration (free oscillation) :～100ns(transfers Q) 5-8ns
Light beam polarization degree:＞90%
Luminous exitance :～2mrad(milliradian)
Simultaneously, take laser pulse shape from oscilloscope.
The present inventor is 0.5320 μ m with the green laser wavelength that the 44W plane grating monochromator is measured NYAB emission also.
The major advantage of this device is, can be with the little photoflash lamp of general goodsization as driving source, and can make according to different needs that volume is little, in light weight, the small utility device of little power consumption, be convenient to take in ungetable plateau, mountain area and the remote rural area and go.The present inventor has made the gadget with form of a stroke or a combination of strokes battery (No. 5 batteries) power supply, and volume is 42mm * 72mm * 135mm, and weight is less than 400 grams.
Meaning of the present invention is to develop a kind of Solid Laser Elements of transmitting green laser of small-sized usefulness incoherent light source pumping, and makes its fields such as laser medicine, laser hologram photography, laser high speed photography obtain to use.
Be noted that further those of ordinary skill in the art can use the optics good uniformity, cuts into the Nd of laser bar by the phase matched direction xY 1-xAl 3(BO 3) 4(X=0.03-0.08) crystal design becomes the needed laser head of other multiple applications, and as fields such as laser velocimeter field, laser underwater communication, laser drill, high-altitude photos, these all can not exceed design of the present invention and protection range.

Claims (8)

1, a kind of minature solide-state laer spare uses [Nd xY 1-xAl 3(BO 3) 4] monocrystal makes the self-frequency-doubling laser operation material, produces the laser of 0.532 mum wavelength with incoherent light source as pumping source, it is characterized in that X gets 0.03-0.05.
2, minature solide-state laer spare as claimed in claim 1 is characterized in that, described incoherent light source is pulse.
3, minature solide-state laer spare as claimed in claim 1 is characterized in that, described incoherent light source is continuous.
4, minature solide-state laer spare as claimed in claim 1 is characterized in that, described [Nd xY 1-xAl 3(BO 3) 4] (X=0.03-0.05) the monocrystalline laser bar that can cut into different size by the direction that is complementary of I class or II class produce the laser of 0.532 mum wavelength.
5, as claim 1 or 4 described Laser Devices, it is further characterized in that described incoherent light source is the small-sized straight lamp or the common xenon flash lamp of low power density.
6, as claim 1 or 4 described Laser Devices, it is further characterized in that described incoherent light source is the light-emitting diode of low power density.
7, as claim 1 or 4 described Laser Devices, it is further characterized in that described incoherent light source is a krypton lamp.
8, as claim 1 or 4 described Laser Devices, it is further characterized in that the strong incoherent light source of described incoherent light source for other Spectral matching.
CN 89102343 1989-04-15 1989-04-15 Laser device made from aluminium-yttrium-neodymium tetraborate monocrystal Expired CN1016301B (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN 89102343 CN1016301B (en) 1989-04-15 1989-04-15 Laser device made from aluminium-yttrium-neodymium tetraborate monocrystal
JP2069935A JPH0666502B2 (en) 1989-04-15 1990-03-22 Double frequency miniature laser device having NYAB crystal as laser material
US07/505,022 US5058118A (en) 1989-04-15 1990-04-05 Self-frequency-doubling minilaser device with NYAB crystal as laser materials

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 89102343 CN1016301B (en) 1989-04-15 1989-04-15 Laser device made from aluminium-yttrium-neodymium tetraborate monocrystal

Publications (2)

Publication Number Publication Date
CN1046414A CN1046414A (en) 1990-10-24
CN1016301B true CN1016301B (en) 1992-04-15

Family

ID=4854656

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 89102343 Expired CN1016301B (en) 1989-04-15 1989-04-15 Laser device made from aluminium-yttrium-neodymium tetraborate monocrystal

Country Status (1)

Country Link
CN (1) CN1016301B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101499613B (en) * 2008-01-31 2012-02-22 中国科学院福建物质结构研究所 Self-frequency-sum erbium solid laser device
CN105342699A (en) * 2015-11-16 2016-02-24 长春光机医疗仪器有限公司 Therapeutic apparatus by utilizing erbium laser light

Also Published As

Publication number Publication date
CN1046414A (en) 1990-10-24

Similar Documents

Publication Publication Date Title
EP0329442B1 (en) Frequency conversion of optical radiation
EP0398570B1 (en) Frequency conversion of optical radiation
US5682397A (en) Er:YALO upconversion laser
EP0301803B1 (en) Intracavity generation of coherent optical radiation by optical mixing
US5285467A (en) Compact, efficient, scalable neodymium laser co-doped with activator ions and pumped by visible laser diodes
US6301275B2 (en) Self-frequency doubled Nd-doped YCOB laser
EP0318199A2 (en) Generation of coherent optical radiation by optical mixing
US5237578A (en) Solid-state laser device capable of producing an outgoing laser beam having a narrower spectral band width
US5062117A (en) Tailored laser system
Zhang et al. Efficient Laser Performance of Nd3+: Sr5 (PO4) 3F at 1.059 and 1.328 μm
US4969150A (en) Tunable, continuous wave, thulium-doped, solid state laser
US5058118A (en) Self-frequency-doubling minilaser device with NYAB crystal as laser materials
CN103872572A (en) Self-Q-switched cross-polarized dual-wavelength pulse laser
CN101614930A (en) A kind of frequency tuning method for TeraHertz parameter oscillator
CN211879768U (en) Dual-wavelength pumping ultraviolet laser generating device
CN1016301B (en) Laser device made from aluminium-yttrium-neodymium tetraborate monocrystal
CN1016302B (en) Device of lasers made of aluminium neodymium tetraborate monocrystal
US5388112A (en) Diode-pumped, continuously tunable, 2.3 micron CW laser
US4377864A (en) Chromium (III) ordered perovskite lasers and media therefor
Esherick et al. Polarization effects in laser-pumped Nd: YAG lasers
US4229713A (en) Stoichiometric rare earth laser material and laser based thereon
CN118352875A (en) Ultraviolet band wavelength tunable single-frequency laser device
Eichler et al. Diode-pumped 3 μm Er3+: BaY2F8 cw laser with optimized Er3+-concentration
CN104505705B (en) It is all solid state from Raman femto-second laser
Kopczyński et al. Optical and lasing properties of crystals for diode pumped solid state lasers

Legal Events

Date Code Title Description
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C06 Publication
PB01 Publication
C13 Decision
GR02 Examined patent application
C14 Grant of patent or utility model
GR01 Patent grant
C19 Lapse of patent right due to non-payment of the annual fee
CF01 Termination of patent right due to non-payment of annual fee