CN102684063B - White light random laser - Google Patents
White light random laser Download PDFInfo
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- CN102684063B CN102684063B CN201210132223.4A CN201210132223A CN102684063B CN 102684063 B CN102684063 B CN 102684063B CN 201210132223 A CN201210132223 A CN 201210132223A CN 102684063 B CN102684063 B CN 102684063B
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Abstract
A white light random laser outputs a three primary colors by the aid of a laser pump mixed with dyes, and acquires white lights with narrow line width and high strength by means of using titanium dioxide (TiO2) nanoparticles as random scatterer for providing positive feedback, wherein the three primary colors comprise red, green and blue. The dyes used for generating the three primary colors of red, green and blue include coumarin 440 (C-440), coumarin 6 (C-6), pumping source of 355nm light and Oxazine with pumping source of 532nm. The basic principle of the white light random laser includes that by the aid of the nanosecond pulsed laser pumping with a 355nm wavelength, red light (R) is generated by means of coumarin C-440 blue light (B), coumarin C-440 green light (G) and a litter portion of light close to the 532nm green light as pumping oxazine, and most of the light close to the 532nm green light is used as the green light (G) of the white light. The white light random laser adopts the random laser principle, and outputs lasers by using titanium dioxide nanoparticles as random scatterer for providing positive feedback.
Description
Technical field
The invention belongs to field of photoelectric technology, relate to a kind of accidental laser of novel generation white light.
Background technology
The laser of multi-wavelength output, and white light laser in photoelectron technology, be people in the urgent need to light source.Common white light source is incandescent lamp or Halogen lamp LED (as bromine tungsten filament lamp, iodine-tungsten lamp etc.).Coherence's extreme difference of this white light source, cannot meet the demand of a lot of application.Some conventional laser also can produce white light, as argon ion laser.But this laser cost is high, consumes energy high, and volume is large, its application is restricted.Accidental laser is the new laser that a kind of developed recently gets up.It simple in structure, does not need traditional resonant cavity, debugs very convenient.But white light accidental laser there is not yet report.
The present invention proposes a kind of accidental laser that produces white light, the white light of its output has laser characteristics.
Summary of the invention
White light accidental laser is by a branch of one-wavelength laser pumping mixed dye output red, green, blue three primary colors, and with titanium dioxide (TiO
2) nano particle improves positive feedback as random scatter body, thereby a kind of new laser of acquisition narrow linewidth, high strength white light.Producing dyestuffs blue, green, red three primary colors is respectively: cumarin Coumarin440 (C-440), cumarin Coumarin6 (C-6), and pumping source 355nm light, and oxazines Oxazine, its pump light source is 532nm.The basic principle of white light accidental laser is: under the ps pulsed laser and ns pulsed laser pumping that is 355nm at wavelength by C-440 blue light (B), C-6 green glow (G), near the sub-fraction this green glow 532nm is used as the green glow (G) of white light to produce ruddiness (R) the residue overwhelming majority for pumping oxazines.The operation principle of laser adopts the principle of Random Laser, in mixed dye, adds titania nanoparticles TiO
2(particle diameter 50nm), as scattering object, so that positive feedback to be provided, thereby obtains Laser output.
According to the present invention, a kind of white light accidental laser is provided, it is characterized in that: comprise pumping source, as the mixed solution of three kinds of dyestuffs of gain medium, and provide the nano particle of positive feedback, the solvent of described mixed solution is ethanol, and described three kinds of dyestuffs are respectively cumarin Coumarin440 (C-440), cumarin Coumarin6 (C-6), and oxazines Oxazine.
The described nano particle that positive feedback is provided is TiO
2, or ZnO, or SiO
2, or Al
2o
3or Nd
0.5la
0.5al
3(BO
3)
4the mixture of ceramic or above-mentioned several materials.
The concentration range of described cumarin Coumarin440 (C-440) is that 0.09625mg/mL is between 1.54mg/mL.
The concentration range of described cumarin Coumarin6 (C-6) is that 0.1675mg/mL is between 0.67mg/mL.
The concentration of described oxazines Oxazine is that 0.0625mg/mL is between 4mg/mL.
Described C-440, C-6 and oxazines mixed proportion scope are 3: 10: 1～12: 16: 1.
The described concentration range that provides the nano particle of positive feedback to add is that 0.125mg/mL is to 0.5mg/mL.
The concentration of described C-440, C-6 and oxazines is respectively C
440=1.54mg/mL, C
6=0.67mg/mL, C
q=4mg/mL, mixed proportion is 12: 16: 1, described in provide positive feedback nano particle add concentration range be 0.25mg/mL, the wavelength of described pumping source is 355nm.
A method of manufacturing white light accidental laser, is characterized in that: comprise the following steps:
(1) mixed solution of three kinds of dyestuffs of preparation, solvent is ethanol, described three kinds of dyestuffs are respectively cumarin Coumarin440 (C-440), cumarin Coumarin6 (C-6), and oxazines Oxazine, and the concentration of described three kinds of dyestuffs is respectively: C
440=1.54mg/mL, C
6=0.67mg/mL, Cq=4mg/mL, the mixed proportion of described three kinds of dye solutions is 12: 16: 1, and mixed solution is put into transparent vessel;
(2) in mixed dye solution, mixing concentration is 0.25mg/mL titania nanoparticles, and particle size is 50nm, and this particle is as scattering object, and positive feedback is provided;
(3) light that the wavelength after frequency tripling is 355nm with nanosecond pulse YAG laser irradiates mixed solution as pump light;
(4) cumarin Coumarin440 (C-440) and cumarin Coumarin6 (C-6) dyestuff are after the pulsed light beam pumping of 355nm, obtain respectively blueness and green laser that centre wavelength is 431.8nm and 518.36nm, live width is respectively 6.28nm and 40nm;
(5) in the broadband green glow that cumarin Coumarin6 (C-6) sends, be distributed near the light of 532nm oxazines Oxazine dyestuff is played to pumping effect, the red laser that acquisition wavelength is 647.42nm, live width is 20nm;
(6) after pumping effect, the excitation spectrum of cumarin Coumarin6 (C-6) dyestuff is compressed, and centre wavelength moves to 506.55nm, and live width is 20nm;
(7) centre wavelength is respectively the blue laser of 431.8nm, and the green laser of 506.55nm and the red laser of 647.42nm are mixed into white laser.
Accompanying drawing explanation
Accompanying drawing 1: the index path of white light accidental laser.
The excitation spectrum of 2: three kinds of dyestuffs of accompanying drawing.
Accompanying drawing 3: the output spectrum of white light laser.
Accompanying drawing 4: the output characteristic of cumarin Coumarin440 (C-440) dyestuff.
Accompanying drawing 5: the output characteristic of cumarin Coumarin6 (C-6) dyestuff and oxazines Oxazine dyestuff.
Embodiment
Below in conjunction with accompanying drawing explanation specific implementation method.Accompanying drawing 1 is the index path of white light accidental laser.
In ethanol, add appropriate cumarin Coumarin440 (C-440), cumarin Coumarin6 (C-6) and tri-kinds of dyestuffs of oxazines Oxazine, and add appropriate titania nanoparticles, thereby form working-laser material and reponse system.
The operating characteristic of three kinds of dyestuffs is: cumarin Coumarin440 (C-440) and cumarin Coumarin6 (C-6) dyestuff, after the pulsed light beam pumping of 355nm, obtain respectively blueness and green laser that centre wavelength is 431.8nm and 518.36nm.And the oxazines Oxazine dyestuff red laser that output wavelength is 647.42nm after the pulsed light beam pumping of 532nm.The detailed process of laser is: the light of the 355nm producing through frequency tripling with nanosecond pulse YAG laser irradiates mixed dye solution as pump light, and cumarin Coumarin440 (C-440) and cumarin Coumarin6 (C-6) dyestuff directly produce blueness and the green laser that centre wavelength is 431.8nm and 518.36nm.Utilize the feature of the green glow broader bandwidth that cumarin Coumarin6 (C-6) sends, make near its light being distributed in 532nm play pumping effect to oxazines Oxazine dyestuff, the red laser that to obtain wavelength be 647.42nm.The light of three kinds of colors is by the use titanium dioxide (TiO in solution
2) nano particle Multiple Scattering, finally forming closed-loop path, i.e. equivalent resonant cavity, provides positive feedback thus, and the light of three kinds of colors is exaggerated.Suitably adjust the ratio of three kinds of dyestuffs, can make the laser of three kinds of colors mix the rear white laser that forms.
Accompanying drawing 2 is for cumarin Coumarin440 (C-440) dyestuff, cumarin Coumarin6 (C-6) dyestuff are under the effect of 355nm pump light and the indigo plant exported under the effect of 532nm pump light of oxazines Oxazine dyestuff, the spectrum of green, red three primary colors light.
Accompanying drawing 3 is the output spectrum of white light accidental laser.Can see, near light in the wide spectrum of cumarin Coumarin6 (C-6) dyestuff 532nm to oxazines Oxazine dye pump after, make oxazines Oxazine dyestuff send ruddiness on the one hand, compressed the narrowing of spectrum that makes on the other hand cumarin Coumarin6 (C-6) dyestuff, its centre wavelength of the spectrum after compression is 506.55nm.
Accompanying drawing 4 and accompanying drawing 5 have provided respectively pump power-power output relation of cumarin Coumarin440 (C-440) dyestuff and Coumarin6 (C-6) dyestuff and oxazines Oxazine dyestuff.Can see, the output of three kinds of dyestuffs all has obvious threshold property.This shows that three primary colors light all has laser characteristics.Therefore the white light that three primary colors are mixed to form has laser characteristics.
The concentration range of described cumarin Coumarin440 (C-440) be 0.09625mg/mL between 1.54mg/mL, preferably 1.54mg/mL
The concentration range of described cumarin Coumarin6 (C-6) be 0.1675mg/mL between 0.67mg/mL, preferably 0.67mg/mL.
The concentration of described oxazines Oxazine be 0.0625mg/mL between 4mg/mL, be preferably 4mg/mL.
The mixed proportion scope of described three kinds of dye solutions is 3: 10: 1～12: 16: 1, is preferably 12: 16: 1.
The described scattering particles that positive feedback is provided also can comprise ZnO, SiO
2, Al
2o
3(or surperficial metallic Al
2o
3) or Nd
0.5la
0.5al
3(BO
3)
4pottery.Silicon dioxide, to very strong (more than 70%) of UV Absorption, is generally used in the scattering in ruddiness region.Scattering object wherein can be also the mixture of above-mentioned several materials.
Described scattering object particle diameter is 28nm～500nm, is preferably 50nm.Described scattering object concentration range be 0.125mg/mL to 0.5mg/mL, be preferably 0.25mg/mL.
The manufacture method of above-mentioned white light laser can comprise the following steps:
(1) mixed solution of three kinds of dyestuffs of preparation, solvent is ethanol, described three kinds of dyestuffs are respectively cumarin Coumarin440 (C-440), cumarin Coumarin6 (C-6), and oxazines Oxazine, and the concentration of described three kinds of dyestuffs is respectively: C
440=1.54mg/mL, C
6=0.67mg/mL, Cq=4mg/mL, put into transparent vessel by mixed solution;
(2) in mixed dye solution, mix scattering particles, this particle is as scattering object, and positive feedback is provided;
(3) light that the wavelength after frequency tripling is 355nm with nanosecond pulse YAG laser irradiates mixed solution as pump light;
(4) cumarin Coumarin440 (C-440) and cumarin Coumarin6 (C-6) dyestuff are after the pulsed light beam pumping of 355nm, obtain respectively blueness and green laser that centre wavelength is 431.8nm and 518.36nm, live width is respectively 6.28nm and 40nm;
(5) in the broadband green glow that cumarin Coumarin6 (C-6) sends, be distributed near the light of 532nm oxazines Oxazine dyestuff is played to pumping effect, the red laser that acquisition wavelength is 647.42nm, live width is 20nm;
(6) after pumping effect, the excitation spectrum of cumarin Coumarin6 (C-6) dyestuff is compressed, and centre wavelength moves to 506.55nm, and live width is 20nm;
(7) centre wavelength is respectively the blue laser of 431.8nm, and the green laser of 506.55nm and the red laser of 647.42nm are mixed into white laser.
Claims (6)
1. a white light accidental laser, it is characterized in that: comprise pumping source, as the mixed solution of three kinds of dyestuffs of gain medium, and provide the nano particle of positive feedback, the solvent of described mixed solution is ethanol, described three kinds of dyestuffs are respectively cumarin Coumarin440 (C-440), cumarin Coumarin6 (C-6), and oxazines Oxazine, the wavelength of described pumping source is 355nm, described cumarin Coumarin440 (C-440), cumarin Coumarin6 (C-6) and oxazines mixed proportion scope are 3:10:1～12:16:1, the described concentration range that provides the nano particle of positive feedback to add is that 0.125mg/mL is to 0.5mg/mL.
2. according to the white light accidental laser of claim 1, it is characterized in that: described in the nano particle of positive feedback is provided is TiO
2, or ZnO, or SiO
2, or Al
2o
3or Nd
0.5la
0.5al
3(BO
3)
4the mixture of ceramic or above-mentioned several materials.
3. according to the white light accidental laser of claim 1, it is characterized in that: the concentration range of described cumarin Coumarin440 (C-440) is that 0.09625mg/mL is between 1.54mg/mL.
4. according to the white light accidental laser of claim 1, it is characterized in that: the concentration range of described cumarin Coumarin6 (C-6) is that 0.1675mg/mL is between 0.67mg/mL.
5. according to the white light accidental laser of claim 1, it is characterized in that: the concentration of described oxazines Oxazine is that 0.0625mg/mL is between 4mg/mL.
6. according to white light accidental laser arbitrary in claim 1-5, the concentration of described cumarin Coumarin440 (C-440), cumarin Coumarin6 (C-6) and oxazines is respectively C
440=1.54mg/mL, C
6=0.67mg/mL, C
q=4mg/mL, mixed proportion is 12:16:1, described in provide positive feedback nano particle add concentration range be 0.25mg/mL, the wavelength of described pumping source is 355nm.
7. a method of manufacturing white light accidental laser, is characterized in that: comprise the following steps:
(1) mixed solution of three kinds of dyestuffs of preparation, solvent is ethanol, described three kinds of dyestuffs are respectively cumarin Coumarin440 (C-440), cumarin Coumarin6 (C-6), and oxazines Oxazine, and the concentration of described three kinds of dyestuffs is respectively: C
440=1.54mg/mL, C
6=0.67mg/mL, C
q=4mg/mL, the mixed proportion of described three kinds of dye solutions is 12:16:1, and mixed solution is put into transparent vessel;
(2) in mixed dye solution, mixing concentration is 0.25mg/mL titania nanoparticles, and particle size is 50nm, and this particle is as scattering object, and positive feedback is provided;
(3) light that the wavelength after frequency tripling is 355nm with nanosecond pulse YAG laser irradiates mixed solution as pump light;
(4) cumarin Coumarin440 (C-440) and cumarin Coumarin6 (C-6) dyestuff are after the pulsed light beam pumping of 355nm, obtain respectively blueness and green laser that centre wavelength is 431.8nm and 518.36nm, live width is respectively 6.28nm and 40nm;
(5) in the broadband green glow that cumarin Coumarin6 (C-6) sends, be distributed near the light of 532nm oxazines Oxazine dyestuff is played to pumping effect, the red laser that acquisition wavelength is 647.42nm, live width is 20nm;
(6) after pumping effect, the excitation spectrum of cumarin Coumarin6 (C-6) dyestuff is compressed, and centre wavelength moves to 506.55nm, and live width is 20nm;
(7) centre wavelength is respectively the blue laser of 431.8nm, and the green laser of 506.55nm and the red laser of 647.42nm are mixed into white laser.
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|---|---|---|---|
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103107484A (en) * | 2013-01-22 | 2013-05-15 | 燕山大学 | Random laser based on wave-guiding structure |
| CN103762494B (en) * | 2014-01-20 | 2016-06-08 | 东南大学 | A kind of switch controlled liquid accidental laser of doped magnetic nanoparticle |
| CN104538828B (en) * | 2014-12-29 | 2017-12-15 | 北京工业大学 | A kind of solid accidental laser of pulling method tuning wavelength |
| CN104716553B (en) * | 2015-03-25 | 2018-09-04 | 电子科技大学 | Optical pumping SiO2- Rh6G gel accidental lasers and preparation method thereof |
| CN105006729B (en) * | 2015-08-20 | 2017-10-13 | 电子科技大学 | The method of accidental laser, the manufacture of Stochastic Resonance chamber and detection molecule concentration |
| CN105305219A (en) * | 2015-10-09 | 2016-02-03 | 东南大学 | Optical fluid three-color composite random laser |
| CN106316373A (en) * | 2016-07-29 | 2017-01-11 | 江苏罗化新材料有限公司 | Preparing method for high power illuminant fluoride florescent and crystalline ceramics |
| CN107221829A (en) * | 2017-06-13 | 2017-09-29 | 合肥工业大学 | The disordered polymer optical fiber random laser device adulterated based on nano particle |
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| CN102103296A (en) * | 2010-11-29 | 2011-06-22 | 沈阳理工大学 | Dye and liquid crystal co-doped light source device-based tunable method |
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| US6795464B2 (en) * | 2001-12-10 | 2004-09-21 | Spectra Systems Corporation | Temperature control of laser action in scattering media |
| US20110010911A1 (en) * | 2009-06-24 | 2011-01-20 | Massachusetts Institute Of Technology | Methods and apparatus for light harvesting in displays |
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|---|---|---|---|---|
| KR100829064B1 (en) * | 2006-12-19 | 2008-05-19 | 연세대학교 산학협력단 | Random lasing nano porous membrane with directionality and preparation method thereof |
| CN102103296A (en) * | 2010-11-29 | 2011-06-22 | 沈阳理工大学 | Dye and liquid crystal co-doped light source device-based tunable method |
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