CN1146504A - Self-frequency-multiplication optical uper lattice LN and LT crystal growth and relative device - Google Patents
Self-frequency-multiplication optical uper lattice LN and LT crystal growth and relative device Download PDFInfo
- Publication number
- CN1146504A CN1146504A CN95112708.XA CN95112708A CN1146504A CN 1146504 A CN1146504 A CN 1146504A CN 95112708 A CN95112708 A CN 95112708A CN 1146504 A CN1146504 A CN 1146504A
- Authority
- CN
- China
- Prior art keywords
- linbo
- crystal
- frequency
- litao
- self
- 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.)
- Pending
Links
- 239000013078 crystal Substances 0.000 title claims abstract description 37
- 230000003287 optical effect Effects 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 14
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 7
- 229910013641 LiNbO 3 Inorganic materials 0.000 claims description 25
- 239000000463 material Substances 0.000 claims description 10
- 238000010348 incorporation Methods 0.000 claims description 6
- 239000011149 active material Substances 0.000 claims description 3
- 230000008832 photodamage Effects 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 claims 1
- 230000000737 periodic effect Effects 0.000 abstract description 3
- 229910003327 LiNbO3 Inorganic materials 0.000 abstract 2
- 229910012463 LiTaO3 Inorganic materials 0.000 abstract 2
- 150000002910 rare earth metals Chemical class 0.000 abstract 1
- 230000000295 complement effect Effects 0.000 description 9
- 230000007812 deficiency Effects 0.000 description 7
- 239000004065 semiconductor Substances 0.000 description 4
- 238000000862 absorption spectrum Methods 0.000 description 3
- 238000002189 fluorescence spectrum Methods 0.000 description 3
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
Images
Landscapes
- Lasers (AREA)
Abstract
The present invention uses direct method to make growth, and the periodic temp. fluctuation is introduced into the asymmetric temp. field, so that the periodic ferroelectric domain structure (optical super crystal lattice structure) is introduced in M:N:LiNbO3 or M:LiTaO3 crystal (M:rare earth active ion Nb3+, Er3+, Pr3+ and H3+, etc. N:MgO, ZnO and Sc2Oe), and thent he quasi-phase matching method is used so as to can implement self double-frequency output. Said invention uses LiNbO3 or LiTaO3 maximum nonlinear coefficient d33, so that it overcomes the disadvantages resulted under the condition of alpha-polarization state (low-gain) when matching in 1-type phases, and has no need of temp. device and precision temp. control, and can implement self double-frequency output from blue light to near-infrared light.
Description
The invention belongs to novel material and corresponding device; Relate to from frequency multiplication novel material and self-frequency-doubling laser.
Existing have Nd:YAB, M-NYAB and single domain Nd:MgO (or Sc from double-frequency material
2O
3): LiNbO
3Crystal Nd:YAB belongs to trigonal system uniaxial negative crystal, nonlinear factor d
11=4.06*10
-9Prior art is described (e.s.u) with reference to the accompanying drawings.
Fig. 1 is Nd:YAB from the principle of compositionality figure of frequency multiplication green laser (Fig. 1):
Fig. 2 is the principle of compositionality figure (Fig. 2) of N-MYAB from the output of frequency multiplication green glow:
Fig. 3,4 is Nd:MgO:LiNbO
3Be uniaxial negative crystal, use nonlinear factor d
31=4.8*10
-9E.s.u
Nd:MgO:LiNbO
3Absorption and fluorescence spectrum figure.
Fig. 5 is Nd:ScO
3: LiNbO
3Principle of compositionality figure from the frequency multiplication green (light) laser:
1. laser diode LD; 2 focusing systems; 3.NYAB self-frequency-doubling crystal;
4. input terminus speculum; 5. output end mirror
21-temperature control instrument 22-LD 23-focusing system 24-input terminus speculum
25,27-anti-reflection film 26-self-frequency doubling laser crystal 28-output end mirror
29, the smooth instrument 42-of 30-beam splitter 41-analyzer 43,45-resistance dynamometer 44-optical filtering
Abscissa is a wavelength among Fig. 3, and ordinate is a uptake factor.
Abscissa is a wavelength among Fig. 4, and ordinate is a fluorescence intensity.
Existing two kinds of self-frequency-doubling crystals still have its suitable deficiency, Nd:YAB and M-NYAB are because the complicated existence of its domain structure grows layer, growth technique complexity, be difficult to obtain high-quality crystal, and this material nonlinearity coefficient is lower, thereby has influenced from shg efficiency greatly.Single domain Nd:MgO (or Sc
2O
3): LiNbO
3Utilize the d of this material
31Nonlinear factor, but, must satisfy σ-polarization state, and σ-polarization state is a low gain in order to realize I saphe coupling, on the prior art for overcoming this deficiency, in resonator cavity, add the Brewster window, but this has increased the insertion loss greatly, has influenced from shg efficiency, as use 90 ° of positions and be complementary, not only have above-mentioned deficiency, also have the high deficiency of temperature control requirement, these two kinds of materials can only be used for producing green glow from frequency multiplication in addition.
Purpose of the present invention is exactly will reach to improve nonlinear factor, overcome the deficiency of utilizing low gain σ-polarization state, do not need temperature control and widen from frequency multiplication output wavelength scope.
Technical solution of the present invention is: LiNbO
3Or M:LiTaO
3At LiNbO
3Or LiTaO
3(rare earth ion is at Nd as laser active material to mix rare earth ion in the crystal
3+, Er
3+, Pr
3+, H
o 3+Deng in select), incorporation: 0.2-0.5wt% is at LiNbO
3Mix MgO, ZnO or Sc in the crystal
2O
3To increase the photodamage resistant threshold values of this material, incorporation: 0.5-7.0mol%.In the asymmetrical temp field, utilize direct method to grow optical superlattice LiNbO along a axle with corresponding ferroelectric modulation period of structure
3And LiTaO
3The self-frequency-doubling crystal, warm field gradient 20-50 ℃/cm, horizontal gradient 5-25 ℃/cm.By the modulation growthing process parameter, make and equal the twice of the pairing coherence length of laser oscillation wavelength optical superlattice self-frequency-doubling crystal's modulation period, can satisfy accurate the condition (make the parallel a axle of pump light optical direction, and make pump polarisation of light direction be parallel to the crystal c axle) that is complementary this moment.
This invention has utilized accurate the method that is complementary, thereby has utilized the nonlinear factor d of unavailable maximum in the one-domain structure material
33(relative LiNbO
3Crystal.d
33Be d
317.5 times.Thereby can obtain the frequency multiplication enhancement factor and can reach 23 times).The accurate position method of being complementary can be at LiNbO
3, LiTaO
3Realize in the whole transparency range of crystalline that the position is complementary, thereby can be to Nd
3+The 946nm emission wavelength produce blue light from frequency multiplication, to Nd
3+1.084 μ m or Er
3+1.53 μ m equiwavelengths produce from green glow near infrared full curing self-frequency-doubling laser from frequency multiplication.And overcome the deficiency that its original self-frequency-doubling crystal can only produce green glow (531-542nm).In accurate the process that is complementary, all light waves are the π polarization state of high gain, thereby are easy to accurate the necessary deficiency of using the σ polarization state of low gain in the I saphe matching process that is complementary and overcome.Single domain LN crystalline temp coefficient is big, thereby when being complementary 90 ° of positions, temperature control precision requires high, and the accurate position technology that is complementary at room temperature can realize, and temperature stability is good.Thereby the present invention can develop efficiently self-frequency-doubling laser and be significantly improved and break through from the frequency multiplication field of new.
The invention will be further described below in conjunction with drawings and Examples:
Fig. 6 is applied to the setting drawing of green (light) laser for the present invention:
Fig. 7,8 is the frequency multiplication design sketch, and abscissa is the semiconductor laser power input, and ordinate is represented shg output power.
61. be pump light source: semiconductor laser (LD), to Nd:MgO:LiNbO
3The optical superlattice crystal can be used the LD of 813nm.
62. be focusing system.
63. be the optical superlattice self-frequency-doubling crystal, plated film on the crystal face of front and back.To Nd:Mg:LiNbO
3Optical superlattice crystal (a-axle optical direction), preceding crystal face require 813nm is seen through, and 1084nm is all-trans, and be high anti-to 542nm, and back crystal face then requires 1084nm high anti-, high anti-to 813nm, and high saturating to 542nm.
64. be outgoing mirror.
65. for exporting from frequency doubled light (to Nd:MgO:LiNbO
3From frequency multiplication optical superlattice crystal, output wavelength is 542nm.
(1). optical superlattice LiNbO
3Crystal is to the direct frequency multiplication of optical parametric oscillator (OPO) and noise spectra of semiconductor lasers (LD), and the LT crystal need not add metal oxide, sample parameters all fours LN sample.Carry out periodic Control with the asymmetrical temp field.
A. to the direct frequency multiplication result of OPO (table (1))
Table (1):
Sample 1,2,3,4,5 processing condition
| Sample | Thickness (mm) | Cycle (μ m) | Cycle life | Fundamental wavelength (nm) | Efficient (%) |
| ??1 | ??0.62 | ??2.8 | ????220 | ????815 | ??3.0 |
| ??2 | ??0.78 | ??3.4 | ????230 | ????860 | ??4.2 |
| ??3 | ??1.56 | ??5.2 | ????300 | ????980 | ??24.0 |
| ??4 | ??2.20 | ??6.4 | ????310 | ????1026 | ??17.0 |
| ??5 | ??1.50 | ??8.3 | ????180 | ????1130 | ??19.8 |
Sample adds dosage dosage temperature field gradient horizontal gradient in addition
1??????Nd3+?????0.1????0???????0???????20??????????10
2??????Nd3+?????0.2????0???????0???????30??????????15
3??????Nd3+?????0.2????Mg??????3???????30??????????20
4??????Er3+?????0.3????Sr2O3???0.8?????30??????????20
5??????Er3+?????0.5????Sr2O3???6???????40??????????25
B. to direct frequency multiplication result (Fig. 7: of LD to the LD of 809nm.Fig. 8: to the LD of 980nm).
Fig. 9 is from frequency multiplication optical superlattice Nd:MgO:LiNbO
3The photo of the periodicity domain structure of crystalline growth and b face.
Use the direct method growth among Fig. 9, obtained optical superlattice Nd:MgO:LiNbO
3Self-frequency-doubling crystal's (seeing photo), sample parameters is listed in table (2)
Table (2)
| Thickness (mm) | Modulation period (μ m) | Cycle life | Cyclic swing (≤%) |
| ????3 | ????6.8 | ??440 | ???2 |
Figure 10,11 is optical superlattice Nd:MgO:LiNbO
3, self-frequency-doubling crystal's absorption spectrum and fluorescence emission spectrum abscissa are wavelength, ordinate is represented respectively to absorb and fluorescence intensity.
From absorption spectrum and fluorescence Spectra as can be seen, result and single domain Nd:MgO:LiNbO
3The result similar,
Thereby the optical superlattice self-frequency-doubling laser can be successfully developed in indication.
With a Nd:MgO:LiNbO
3Optical superlattice crystal (cycles 7.2 μ m, cycle life 190), in resonator cavity (the sample end face does not have antireflection layer, and the insertion loss is big), the uses pulsed lasers pumping, first observed arrives from frequency multiplication green glow fluorescence.Illustrate that this crystal is to realize fully exporting from frequency multiplication.
Claims (3)
1. one kind from frequency multiplication optical superlattice crystalline method, it is characterized in that LiNbO
3Or M:LiTaO
3At LiNbO
3Or LiTaO
3(rare earth ion is at Nd as laser active material to mix rare earth ion in the crystal
3+, Er
3+, Pr
3+, H
o 3+Deng in select), incorporation: 0.2-0.5wt% is at LiNbO
3Mix MgO, ZnO or Sc in the crystal
2O
3To increase the photodamage resistant threshold values of this material, incorporation: 0.5-7.0mol%.
2. one kind from frequency multiplication optical superlattice crystalline method, it is characterized in that LiNbO
3Or M:LiTaO
3At LiNbO
3Or LiTaO
3(rare earth ion is at Nd as laser active material to mix rare earth ion in the crystal
3+, Er
3+, Pr
3+, H
o 3+Deng in select), incorporation: 0.2-0.5wt% is at LiNbO
3Mix MgO, ZnO or Sc in the crystal
2O
3Increasing the photodamage resistant threshold values of this material, incorporation: 0.5-7.0mol% utilizes direct method to grow the optical superlattice LiNbO with corresponding ferroelectric modulation period of structure along a axle in the asymmetrical temp field
3And LiTaO
3The self-frequency-doubling crystal, warm field gradient 20-50 ℃/cm, horizontal gradient 5-25 ℃/cm.
3. use from frequency multiplication optical superlattice crystalline by claim 1 is described, it is characterized in that utilizing accurate position phase method to go to realize under the pumping laser effect, to become self-frequency-doubling laser from frequency multiplication.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95112708.XA CN1146504A (en) | 1995-09-27 | 1995-09-27 | Self-frequency-multiplication optical uper lattice LN and LT crystal growth and relative device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95112708.XA CN1146504A (en) | 1995-09-27 | 1995-09-27 | Self-frequency-multiplication optical uper lattice LN and LT crystal growth and relative device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1146504A true CN1146504A (en) | 1997-04-02 |
Family
ID=5079677
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN95112708.XA Pending CN1146504A (en) | 1995-09-27 | 1995-09-27 | Self-frequency-multiplication optical uper lattice LN and LT crystal growth and relative device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1146504A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111048975A (en) * | 2019-12-27 | 2020-04-21 | 河北工业大学 | LiNbO as blue light LD pump Pr3Sodium yellow Raman laser |
| CN111575791A (en) * | 2020-05-13 | 2020-08-25 | 济南大学 | Self-pumping optical parametric oscillation substrate crystal and preparation method thereof |
-
1995
- 1995-09-27 CN CN95112708.XA patent/CN1146504A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111048975A (en) * | 2019-12-27 | 2020-04-21 | 河北工业大学 | LiNbO as blue light LD pump Pr3Sodium yellow Raman laser |
| CN111048975B (en) * | 2019-12-27 | 2021-07-09 | 河北工业大学 | LiNbO as blue light LD pump Pr3Sodium yellow Raman laser |
| CN111575791A (en) * | 2020-05-13 | 2020-08-25 | 济南大学 | Self-pumping optical parametric oscillation substrate crystal and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Kitazawa et al. | Ultraviolet generation at 266 nm in a novel organic nonlinear optical crystal: l‐pyrrolidone‐2‐carboxylic acid | |
| Reid | Resonantly enhanced, frequency doubling of an 820 nm GaAlAs diode laser in a potassium lithium niobate crystal | |
| Bjorkholm | Efficient optical parametric oscillation using doubly and singly resonant cavities | |
| CN110932078A (en) | Medium-far infrared multiband laser | |
| Rines et al. | Nonlinear conversion of Ti: sapphire laser wavelengths | |
| CN204885812U (en) | Pulsed of transferring Q passively is from doubling of frequency green laser | |
| CN105186273B (en) | A kind of double-end pumping optical parametric oscillator | |
| CN1146504A (en) | Self-frequency-multiplication optical uper lattice LN and LT crystal growth and relative device | |
| Abedin et al. | Ordinary and extraordinary continuous wave lasing at 1.092 and 1.082 μm in bulk Nd: LiTaO3 crystal | |
| CN105048274B (en) | A kind of passive Q-adjusted pulsed is from frequency doubling green light laser | |
| Kato | High-efficiency high-power parametric oscillation in KNbO 3 | |
| Lu et al. | Growth of Nd3+‐doped LiNbO3 optical superlattice crystals and its potential applications in self‐frequency doubling | |
| Zhang et al. | Phase-matched second harmonic generation in new organic MHBA crystal | |
| CN1057616C (en) | Increasing the birefringence of ktp and its isomorphs for type II phase matching | |
| CN1288275A (en) | Biperiod superlattice and its application in laser frequency converter | |
| RU192817U1 (en) | Pulsed solid state laser with amplifier | |
| Kato | Phase‐matched generation of 2314 Å in KB5O8⋅ 4 H2O | |
| CN103326221B (en) | Method for reinforcing frequency doubling luminous efficacy by utilizing annular optical fiber active cavity resonance | |
| CN1212694C (en) | High power all-solid-phase double resonance sum frequency blue light laser arrangement | |
| JP3260457B2 (en) | Method for forming domain inversion structure of ferroelectric | |
| CN2553540Y (en) | Sum frequency output blue light laser | |
| CN1219343C (en) | Solid blue light laser using multiple channel frequency-multiplication period super lattice as variab frequency crystal | |
| CN204927803U (en) | Stokes light source based on arsenic acid titanyl potassium crystal | |
| Biaggio et al. | Intracavity frequency doubling of a diode pumped nd: Yag laser using a knbo3 crystal | |
| CN204992239U (en) | All solid state intracavity doubled single frequency laser of compact |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| REG | Reference to a national code |
Ref country code: HK Ref legal event code: GR Ref document number: 1030582 Country of ref document: HK |