CN105762634B - A kind of adjustable fexible film accidental laser of degree of polarization and preparation method thereof - Google Patents
A kind of adjustable fexible film accidental laser of degree of polarization and preparation method thereof Download PDFInfo
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- CN105762634B CN105762634B CN201610316126.9A CN201610316126A CN105762634B CN 105762634 B CN105762634 B CN 105762634B CN 201610316126 A CN201610316126 A CN 201610316126A CN 105762634 B CN105762634 B CN 105762634B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/101—Lasers provided with means to change the location from which, or the direction in which, laser radiation is emitted
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/137—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
- G02F1/139—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering based on orientation effects in which the liquid crystal remains transparent
Abstract
The invention discloses adjustable fexible film accidental lasers of a kind of degree of polarization and preparation method thereof.Accidental laser is membrane structure, is made of polyvinyl alcohol, polyalcohol, dyestuff nematic droplets, and polyalcohol and dyestuff nematic droplets are located in the film of polyvinyl alcohol composition.The present invention is based on the optical anisotropies of nematic liquid crystal, under the conditions of laser pump (ing), pass through the polyvinyl alcohol film of mechanical stretching nematic droplets containing dyestuff, change orientation of the nematic liquid crystal molecule in polyvinyl alcohol film, realize the adjustable Random Laser outgoing of degree of polarization, and Random Laser polarization direction is parallel to draw direction.The continuously adjustable function of the Wavelength stabilized of Random Laser, degree of polarization may be implemented in the present invention, with at low cost, it is simple in structure, realize the features such as facilitating, polarization calibration and system-level performance detection etc. have preferable application value in the laboratory of display, sensor and polarization optics remote sensor.
Description
Technical field
The present invention relates to Random Laser fields, and in particular to a kind of adjustable fexible film accidental laser of degree of polarization and its
Preparation method.
Background technology
In recent years, Random Laser has become the popular research field of international laser educational circles.Random Laser radiation source self-excitation
Disordered Media living, i.e. radiant light provide bulk of optical feedback by the Multiple Scattering in activation Disordered Media, to obtain larger gain,
Because without extra resonance chamber.Laser gain medium is entrained in liquid crystal material and polymerize by polymer dispersed liquid crystals accidental laser
In object, is mismatched using the refractive index between the refractive index and polymer in long axis of liquid crystal molecule direction and scattering is provided, to be formed
Multiple feedback, formed gain, be emitted Random Laser, have it is small, the features such as being easily integrated.
Polarized light source with medium interaction after out scattering light can be determined with the characteristic of its own it is inclined
It shakes information, is different from the information such as light intensity, spectrum, the phase for usually measuring and obtaining, and transmission of the polarised light in scattering medium
It is also regular governed.Polarization technology can be utilized to exclude particle according to the different polarization characteristic of medium scatters and target reflecting light
It scatters the interference of light and improves the clarity of image；The polarization parameter before and after biological tissue's lesion can be carried out using polarization means
It measures, comparison, analyze, to provide a kind of new information analysis means to medical diagnosis；Liquid crystal is carried out using polarised light
Show；Using the adjusting of polarized light source degree of polarization, it can be used for the laboratory polarization calibration of polarization optics remote sensor and system-level performance
Detection；Using the relationship between degree of polarization and tensile stress, it can be used for the sensor of deformation monitoring.
However in Random Laser field, Random Laser can realize going out for linear polarization Random Laser by following methods
It penetrates or the adjusting of Random Laser degree of polarization.The Diederik S.Wiersma groups hair in the non-linear laboratory in (1) 2004 year Europe
The article " Quasi-Two-Dimensional Diffusive Random Laser Action " of table passes through extra electric field reality
Existing liquid crystal molecule is orientated along direction of an electric field, and realizes the outgoing of linear polarization (e polarised lights) light；(2) 2012 years Munster, Germanies
Article " the Emission polarization of random lasers that the Sebastian Knitter groups of university deliver
In organic dye solutions ", pump by the mixed dye in glycerine and nano-particle, and by linearly polarized light,
Realize the outgoing of linear polarization Random Laser；Article " the Band- that the H.J.Coles groups of (3) 2012 years univ cambridge uks deliver
Edge and random lasing in paintable liquid crystal emulsions ", in PVA film structure
Cholesteric liquid crystal droplet is adulterated, helically structural arrangement, structure outgoing have random the liquid crystal molecule in cholesteric liquid crystal drop
The Random Laser of polarization characteristic；Article " the Polarization that the Yao Feng phoenix group of (4) 2013 years Harbin Institute of Technology delivers
and polarization control of random lasers from dye-doped nematic liquid
Crystals " leads to the orientation of liquid crystal molecule in liquid crystal cell by friction orientation, and according to dye molecule and liquid crystal molecule it
Between guest-host effect, realize linear polarization Random Laser outgoing；What the Zhai Tianrui groups of (5) 2015 years Beijing University of Technology delivered
Article " A plasmonic random laser tunable through stretching silver nanowires
Embedded in a flexible substrate ", by will be revolved containing the PDMS solution of nano silver wire and laser dye R6G
It is coated in silicone rubber substrate, forms waveguiding structure, utilize the surface plasma bulk effect and PDMS film structure of nano silver wire
Waveguiding effect, realize random polarization Random Laser outgoing, and by stretch PDMS film, force nano silver wire reorientation and
Fracture, Random Laser wavelength blue shift, remitted its fury, and realize that polarization direction is directed predominantly perpendicular to the Random Laser of draw direction and goes out
It penetrates, the polarization polarizability of Random Laser is converted to 1.51 (i.e. degree of polarization is converted to 0.20 by 0.02) from 1.04.
In the prior art, the realization method of linear polarization Random Laser outgoing, is such as controlled by extra electric field, and energy consumption is higher,
Extra electric field reaches 120KV/cm；The linear polarization Random Laser controlled by friction orientation, the mixing of liquid crystal cell inner dye liquid crystal
Object is liquid, has the shortcomings of complicated, bad mechanical property；By in PVA film adulterate cholesteric liquid crystal drop, outgoing with
Machine laser is random polarization, and foreseeable, due to the helical arrangement of liquid crystal molecule in liquid crystal drop, even if taking stretching side
Formula also cannot achieve the adjusting of Random Laser degree of polarization；The nano-particle solution containing dyestuff is pumped by linearly polarized light, is realized
Linear polarization Random Laser is emitted, and mobility is high, complicated, limits its application in display etc..It is had illicit sexual relations by stretching to contain
The nano silver wire PDMS substrates of material, the fracture using nano grain of silver line and reorientation realize the adjusting of Random Laser degree of polarization,
Adjusting of the degree of polarization from 0.02 to 0.20, adjustable range is small, and optical maser wavelength is unstable, remitted its fury, complicated, prepares
It is of high cost.
Invention content
The object of the present invention is to provide adjustable fexible film accidental lasers of a kind of degree of polarization and preparation method thereof, with solution
It is high energy consumption, complicated certainly when realization linear polarization Random Laser existing in the prior art, and realize that degree of polarization is adjustable random
When laser, degree of polarization adjustable range is narrow, optical maser wavelength is unstable and remitted its fury, the problems such as preparation process is complicated.
To achieve the above object, the technical solution adopted by the present invention is：
A kind of adjustable fexible film accidental laser of degree of polarization, is membrane structure, by polyvinyl alcohol, polyalcohol, dye
Expect that nematic droplets composition, polyalcohol and dyestuff nematic droplets are located in the film of polyvinyl alcohol composition, each group
Point mass percentage be：
Polyvinyl alcohol：30wt%~89.5wt%；
Polyalcohol：0.5wt%~10wt%；
Dyestuff nematic droplets：10wt%~60wt%；
Wherein, dyestuff nematic droplets are made of laser dye and nematic liquid crystal, and in dyestuff nematic liquid crystal
In droplet, the mass percent of laser dye is 0.1wt%~2wt%；
For the fexible film accidental laser using laser as pump light source, pump light is incident on fexible film facet surface
Afterwards, be emitted Random Laser perpendicular to fexible film facet surface, the degree of polarization of Random Laser with fexible film laser drawing
The variation of elongation and change, to realize that Random Laser degree of polarization is continuously adjustable out of 0-0.9 range, and Random Laser
Polarization direction is consistent with draw direction, wavelength stabilized laser.
Preferably, in a diameter of 10nm~20um of dyestuff nematic droplets.
Preferably, the polyalcohol is glycerine.It acts as plasticizer, improve the flexibility of thin film accidental laser part.
Preferably, thickness 10um~300um of the fexible film accidental laser.
Preferably, the angle between the pump light incident direction and fexible film facet surface normal is in 0 °~30 °.
Preferably, the stretching mode that the stretching of the fexible film accidental laser is taken is simple tension or two-way drawing
It stretches.
A kind of preparation method of the adjustable fexible film accidental laser of degree of polarization, includes the following steps：
A. laser dye and nematic liquid crystal are uniformly mixed under ultrasound condition, and it is molten to form the mixing of dyestuff nematic liquid crystal
Liquid；
B. dyestuff nematic liquid crystal mixed solution, polyalcohol are added in the aqueous solution of polyvinyl alcohol, heated and stirred
It is even；
C. uniformly mixed polyvinyl alcohol water solution, polyalcohol, dyestuff nematic liquid crystal solution, by being ultrasonically treated, system
For at the lotion containing dye liquid crystal droplet；
D. film process will be carried out containing the lotion of dye liquid crystal droplet, evaporates moisture, obtains micro- containing dye liquid crystal
The polyvinyl alcohol film of drop.
Preferably, in the step b, heating temperature is 50 °, mixing time 1h.
Preferably, it will carry out film process to obtain method being that curtain coating is made containing the lotion of dye liquid crystal droplet in the step d
Embrane method or film by wet method.
The operation principle of the present invention：Pumping light polarization direction is parallel to the draw direction of thin polymer film, not to polymerization
Object film carry out stretched operation before, nematic liquid crystal director in thin polymer film random orientation be distributed, nematic liquid crystal with
Refringence between polymer is in no-npWith ne-npBetween random distribution, the Random Laser of outgoing is random polarization, partially
Degree of shaking is 0, including e polarised lights and o polarised lights.Wherein, noFor the ordinary index of refraction of liquid crystal, neFor the extraordinary refractive index of liquid crystal,
npFor refractive index polymer.After thin polymer film stretched operation, nematic liquid crystal molecule is orientated along draw direction, is parallel to drawing
It stretches on direction, the refringence between liquid crystal and thin polymer film is gradually increased to ne-np, and perpendicular to draw direction, liquid crystal with
It is n that refringence between thin polymer film, which gradually weakens,o-np.It is accordingly parallel to draw direction, scattering enhancing causes to swash at random
The component enhancing of light in this direction, and perpendicular to draw direction, scattering weakens, and leads to the component of Random Laser in this direction
Weaken.Random Laser degree of polarization gradually increases to 0.9 with the increase of draw ratio by 0.
Advantageous effect：
Compared with prior art, the present invention has the following advantages：
(1) fexible film accidental laser prepared by the present invention program, it is simple in structure, it is at low cost, and preparation process letter
It is single, be conducive to its integrated and large-scale production in Flexible Displays, sensor etc.；
(2) the present invention program realizes the control of Random Laser degree of polarization by way of stretching fexible film accidental laser
System, the polarization direction of Random Laser is parallel with draw direction, and wavelength stabilized laser, and which has realization method simple, energy
Consume small advantage；
(3) present invention is prepared into dyestuff nematic droplets, nematic liquid crystal using nematic liquid crystal with laser dye
Molecule is in ambipolar arrangement in liquid crystal droplet.Liquid crystal molecule tends to stretch out direction arrangement under stretching condition, is easy to improve liquid
Refringence is formed between brilliant and polymer.
(4) polyvinyl alcohol disperses nematic liquid crystal as emulsifier, forms liquid crystal droplet；Polyalcohol uses glycerine, as
Plasticizer improves the flexibility of laser device.
(5) the present invention program can realize that Random Laser degree of polarization is continuously adjustable out of 0-0.9 range, have wider
Adjustable range is conducive to the precision of the laboratory polarization calibration and system-level performance detection that improve polarization optics remote sensor.
Description of the drawings
Fig. 1 is schematic structural view of the invention；
Fig. 2 Random Lasers degree of polarization increases with polyvinyl alcohol film draw ratio and the experimental result of variation.
In Fig. 1,1- polyvinyl alcohol, 2- polyalcohols, 3- dyestuff nematic droplets, 4- pump lights, 5- Random Lasers, 6-
Draw direction.
Specific implementation mode
The present invention is further described below in conjunction with the accompanying drawings.
It is as shown in Figure 1 a kind of adjustable fexible film accidental laser of degree of polarization of the present invention, is membrane structure, by
Polyvinyl alcohol 1, polyalcohol 2, dyestuff nematic droplets 3 form, and polyalcohol 2 and dyestuff nematic droplets 3 are positioned at poly-
In the film that vinyl alcohol 1 is constituted, the mass percentage of each component is：
Polyvinyl alcohol：30wt%~89.5wt%；
Polyalcohol：0.5wt%~10wt%；
Dyestuff nematic droplets：10wt%~60wt%；
Wherein, dyestuff nematic droplets are made of laser dye and nematic liquid crystal, and in dyestuff nematic liquid crystal
In droplet, the mass percent of laser dye is 0.1wt%~2wt%；
For the fexible film accidental laser using pump light as light source, pump light 4 is incident on fexible film facet surface
Afterwards, it is emitted Random Laser 5 perpendicular to fexible film facet surface, the degree of polarization of Random Laser 5 is with fexible film laser
The variation of tensile elongation and change, to realize that Random Laser degree of polarization is continuously adjustable out of 0-0.9 range, and Random Laser 5
Polarization direction and draw direction 6 it is consistent, wavelength stabilized laser.
In a diameter of 10nm~20um of dyestuff nematic droplets.
Polyalcohol is glycerine, can also use other polyalcohols, and it acts as plasticizer, improve thin film accidental laser part
Flexibility.
Thickness 10um~300um of fexible film accidental laser.
Angle between pump light incident direction and fexible film facet surface normal is in 0 °~30 °.
The stretching mode that the stretching of fexible film accidental laser is taken is simple tension or biaxial tension.
The preparation method of the above-mentioned adjustable fexible film accidental laser of degree of polarization, includes the following steps：
A. laser dye and nematic liquid crystal are uniformly mixed under ultrasound condition, and it is molten to form the mixing of dyestuff nematic liquid crystal
Liquid；
B. dyestuff nematic liquid crystal mixed solution, polyalcohol are added in the aqueous solution of polyvinyl alcohol, heated and stirred
It is even；
C. uniformly mixed polyvinyl alcohol water solution, polyalcohol, dyestuff nematic liquid crystal solution, by being ultrasonically treated, system
For at the lotion containing dye liquid crystal droplet；
D. film process will be carried out containing the lotion of dye liquid crystal droplet, evaporates moisture, obtains micro- containing dye liquid crystal
The polyvinyl alcohol film of drop.
In step b, heating temperature is 50 °, mixing time 1h.
It will carry out film process to obtain method being casting film method or wet type containing the lotion of dye liquid crystal droplet in step d
Film method.
Below according to embodiment, the present invention will be further described, this hair can be better understood from according to following embodiment
It is bright.However, specific material proportion, process conditions and its result described in embodiment are merely to illustrate the present invention, without should
The present invention described in detail in claims will not be limited.
Embodiment 1
A kind of adjustable fexible film accidental laser of degree of polarization, wherein including polyvinyl alcohol (np=1.49), glycerine swashs
Photoinitiator dye PM597, nematic liquid crystal E7 (ne=1.75, no=1.52).Specific preparation process is as follows：
(1) laser dye PM597 and nematic liquid crystal E7 ultrasonic mixings, wherein laser dye PM597 accountings 1wt%；
(2) dye liquid crystal mixed solution, glycerine are added to the aqueous solution of the polyvinyl alcohol containing 15wt%, are heated to 50 °, stirring
1h is uniformly mixed；
(3) ultrasonic cell disruption instrument (power 325W, frequency 20KHz, ultrasonic 2s are spaced 3s, total time 3min) is utilized,
The viscous emulsion containing dye liquid crystal droplet is made in disperse dyes liquid crystal mixed liquor；
(4) by crystalline emulsion by film by wet method on the glass substrate, form long 1cm, wide 0.5cm, thickness 40um's
Film removes film from glass substrate, formation fexible film accidental laser, wherein polyvinyl alcohol accounting 58.7wt%,
Glycerine accounting 8.6wt%, dyestuff nematic droplets accounting 32.7wt%.
(5) with Nd：532nm (frequency 10Hz, the pulsewidth 8ns) light sources that YAG laser generates as pump light, with film
Surface normal is incident on fexible film surface in 15 ° of angles, and the polarization direction of pump light is parallel with the long side of fexible film laser,
It can observe Random Laser before and after film surface；
(6) along film long side direction, fexible film laser is symmetrically and evenly stretched through mechanical platform, and controls stretching
Length realizes the adjusting of Random Laser degree of polarization, and the degree of polarization adjustable range of Random Laser is 0-0.82.Random Laser it is inclined
Shaking, direction is consistent with the draw direction of accidental laser, and optical maser wavelength is located at 578 ± 1nm.
(7) when fexible film is non-stretched, the degree of polarization of Random Laser is 0；When stretching 2 times, the degree of polarization of Random Laser is
0.31；When stretching 3 times, the degree of polarization of Random Laser is 0.55；When stretching 4 times, the degree of polarization of Random Laser is 0.75；It stretches
At 4.5 times, the degree of polarization of Random Laser is 0.81；When stretching 5 times, the degree of polarization of Random Laser is 0.82, is emitted random sharp
The measurement result of polarization degree is as shown in Fig. 2, angle is the angle between the optical axis and draw direction of analyzer in figure.
Embodiment 2
A kind of adjustable fexible film accidental laser of degree of polarization, wherein including polyvinyl alcohol (np=1.49), glycerine swashs
Photoinitiator dye PM597, nematic liquid crystal E7 (ne=1.75, no=1.52).Specific preparation process is as follows：
(1) laser dye PM597 and nematic liquid crystal E7 ultrasonic mixings, wherein laser dye PM597 accountings 0.1wt%；
(2) dye liquid crystal mixed solution, glycerine are added to the aqueous solution of the polyvinyl alcohol containing 15wt%, are heated to 50 °, stirring
1h is uniformly mixed；
(3) ultrasonic cell disruption instrument (power 325W, frequency 20KHz, ultrasonic 2s are spaced 3s, total time 3min) is utilized,
The viscous emulsion containing dye liquid crystal droplet is made in disperse dyes liquid crystal mixed liquor；
(4) by crystalline emulsion by film by wet method on the glass substrate, form long 1cm, wide 0.5cm, thickness 10um's
Film removes film from glass substrate, formation fexible film accidental laser, wherein polyvinyl alcohol accounting 89.5wt%,
Glycerine accounting 0.5wt%, dyestuff nematic droplets accounting 10wt%.
Embodiment 3
A kind of adjustable fexible film accidental laser of degree of polarization, wherein including polyvinyl alcohol (np=1.49), glycerine swashs
Photoinitiator dye PM597, nematic liquid crystal E7 (ne=1.75, no=1.52).Specific preparation process is as follows：
(1) laser dye PM597 and nematic liquid crystal E7 ultrasonic mixings, wherein laser dye PM597 accountings 2wt%；
(2) dye liquid crystal mixed solution, glycerine are added to the aqueous solution of the polyvinyl alcohol containing 15wt%, are heated to 50 °, stirring
1h is uniformly mixed；
(3) ultrasonic cell disruption instrument (power 325W, frequency 20KHz, ultrasonic 2s are spaced 3s, total time 3min) is utilized,
The viscous emulsion containing dye liquid crystal droplet is made in disperse dyes liquid crystal mixed liquor；
(4) film that crystalline emulsion is obtained to thickness 300um by casting film legal system shells film from glass substrate
From, formation fexible film accidental laser, wherein polyvinyl alcohol accounting 30wt%, glycerine accounting 10wt%, dyestuff nematic phase liquid
Brilliant droplet accounting 60wt%.
The above is only a preferred embodiment of the present invention, it should be pointed out that：For the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (9)
1. a kind of adjustable fexible film accidental laser of degree of polarization, it is characterised in that：It is membrane structure, by polyvinyl alcohol,
Polyalcohol, dyestuff nematic droplets composition, polyalcohol and dyestuff nematic droplets are located at the thin of polyvinyl alcohol composition
In film, the mass percentage of each component is：
Polyvinyl alcohol：30wt%~89.5wt%；
Polyalcohol：0.5wt%~10wt%；
Dyestuff nematic droplets：10wt%~60wt%；
Wherein, dyestuff nematic droplets are made of laser dye and nematic liquid crystal, and in dyestuff nematic droplets
In, the mass percent of laser dye is 0.1wt%~2wt%；
The fexible film accidental laser is using laser as pump light source, after pump light is incident on fexible film facet surface,
It is emitted Random Laser perpendicular to fexible film facet surface, the degree of polarization of Random Laser is grown with the stretching of fexible film laser
The variation of degree and change, to realize that Random Laser degree of polarization is continuously adjustable out of 0-0.9 range, and the polarization of Random Laser
Direction is consistent with draw direction, wavelength stabilized laser.
2. the adjustable fexible film accidental laser of degree of polarization according to claim 1, it is characterised in that：The dyestuff to
In a diameter of 10nm~20um of row phase liquid crystal droplet.
3. the adjustable fexible film accidental laser of degree of polarization according to claim 1, it is characterised in that：The polyalcohol
For glycerine.
4. the adjustable fexible film accidental laser of degree of polarization according to claim 1, it is characterised in that：The flexible thin
Thickness 10um~300um of film accidental laser.
5. the adjustable fexible film accidental laser of degree of polarization according to claim 1, it is characterised in that：The pump light
Angle between incident direction and fexible film facet surface normal is in 0 °~30 °.
6. the adjustable fexible film accidental laser of degree of polarization according to claim 1, it is characterised in that：The flexible thin
The stretching mode that the stretching of film accidental laser is taken is simple tension or biaxial tension.
7. a kind of preparation method of the adjustable fexible film accidental laser of degree of polarization as described in claim 1-6 is any, packet
Include following steps：
A. laser dye and nematic liquid crystal are uniformly mixed under ultrasound condition, form dyestuff nematic liquid crystal mixed solution；
B. dyestuff nematic liquid crystal mixed solution, polyalcohol are added in the aqueous solution of polyvinyl alcohol, heat and stirs evenly；
C. uniformly mixed polyvinyl alcohol water solution, polyalcohol, dyestuff nematic liquid crystal solution are prepared by being ultrasonically treated
Lotion containing dye liquid crystal droplet；
D. film process will be carried out containing the lotion of dye liquid crystal droplet, evaporates moisture, obtains containing dye liquid crystal droplet
Polyvinyl alcohol film.
8. the preparation method of the adjustable fexible film accidental laser of degree of polarization according to claim 7, including following step
Suddenly：In the step b, heating temperature is 50 DEG C, mixing time 1h.
9. the preparation method of the adjustable fexible film accidental laser of degree of polarization according to claim 7, including following step
Suddenly：It will carry out film process to obtain method being casting film method or wet type containing the lotion of dye liquid crystal droplet in the step d
Film method.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102761058A (en) * | 2012-07-11 | 2012-10-31 | 东南大学 | Method used for adjusting and controlling outgoing wavelength of random laser through changing thickness |
| CN103825163A (en) * | 2014-03-04 | 2014-05-28 | 东南大学 | Device and method for emitting double-faced random lasers with different polarization directions |
| CN104538828A (en) * | 2014-12-29 | 2015-04-22 | 北京工业大学 | Solid random laser device for tuning wavelength through stretching method |
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| US20070091967A1 (en) * | 2005-10-06 | 2007-04-26 | Xiaoming Tao | Laser emitting material, method for making the same and use thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102761058A (en) * | 2012-07-11 | 2012-10-31 | 东南大学 | Method used for adjusting and controlling outgoing wavelength of random laser through changing thickness |
| CN103825163A (en) * | 2014-03-04 | 2014-05-28 | 东南大学 | Device and method for emitting double-faced random lasers with different polarization directions |
| CN104538828A (en) * | 2014-12-29 | 2015-04-22 | 北京工业大学 | Solid random laser device for tuning wavelength through stretching method |
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