CN106403721A - Broadband laser protection method and structure - Google Patents
Broadband laser protection method and structure Download PDFInfo
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- CN106403721A CN106403721A CN201610817167.6A CN201610817167A CN106403721A CN 106403721 A CN106403721 A CN 106403721A CN 201610817167 A CN201610817167 A CN 201610817167A CN 106403721 A CN106403721 A CN 106403721A
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- laser
- sapphire
- housing
- carbon nano
- nano tube
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41H—ARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL
- F41H13/00—Means of attack or defence not otherwise provided for
Abstract
The invention relates to the technical field of surface coatings, nonlinear optics and laser protection, in particular to a broadband laser protection method and structure. The broadband laser protection structure is obtained through the series of steps of preparation of vanadium pentoxide, design of a sapphire shell, preparation of carbon nanotube suspension liquid, and injection and sealing of the suspension liquid. The broadband laser protection structure is widely applied to the technical field of optic intelligent windows and laser protection. The broadband laser protection structure is characterized in that composite multi-element protection is adopted, combined with wave band characteristics of existing various nonlinear optical limiting materials, intensive laser interference signals can be attenuated more effectively through thermally induced phase-transition optical limiting and nonlinear scattering methods, and therefore continuous and adjustable laser protection on the visible light wave band and the near infrared wave band is achieved. The method provided by the invention has the advantages that the process is simple, the rate of finished products is high, and the method is mature and reliable.
Description
Technical field
The present invention relates to a kind of face coat, nonlinear optics lasing safety technology, especially a kind of lasing safety technology,
Specifically know a kind of broadband lasing safety method and its structure well.
Background technology
Laser technology, as one of the important means of war under the conditions of modern high technology, is widely used in military field.Especially
It is that laser weapon has quickly other unrivaled advantages of weapon such as (light velocity), accurate, Anti-amyloid-β antibody, it will make not
Carry out war mode and profound change occurs.In all kinds of laser weapons, Laser interferometers and blinding weapon are in some west military powers
Start to equip in the eighties, only the open report of U.S. army just has as many as 7 kinds of models.The object of attack of this kind of weapon is main
It is human eye and electrooptical device.Vision or even people as interference, damage and the system such as blinding photoelectronic reconnaissance, cannon, navigation and guidance
Eye etc..With the continuous development of this kind of weapon, the continuous improvement of automaticity, the threat that this respect is faced is more and more tighter
Weight, corresponding counter measure has caused the great attention of many countries.Carry out laser blinding Protective Research, to enhancing photoelectric guidance
The anti-laser of weapon injures performance, and the penetration ability improving electro-optical guided weapons is of great significance, and is to win following height
The basis of technology war.
With the development further of laser weapon, corresponding counter measure will be strategic research topic, using light limit
Width nonlinear optical material is one of important counter measure.Organic material, high polymer, semi-conducting material and carbon nanomaterial
The protection of laser blinding, the safety of protection personnel and detection instrument can be carried out in each distinctive wave band.However, in the face of wide ripple
Section continuously adjustabe laser instrument exist guard band narrow the shortcomings of feature, new pattern laser blinding weapon can not be well adapted to
Development.
Using composite multi-component safeguard structure, in conjunction with the band characteristic of various nonlinear optical limiting material at present, by thermic
Phase transformation optical Limiting and nonlinear scattering method, can be designed that there is broadband laser optics safeguard structure, and more effectively
Laser interferometers signal is decayed, thus realizing the protection to visible light wave range and near infrared band continuously adjustabe laser.
Content of the invention
Present invention aims to existing light laser signal（Laser power density is in 50W/mm2More than）Lack reason
The problem of the safeguard procedures thought, invents a kind of broadband dual laser means of defence, provides a kind of corresponding safeguard structure simultaneously,
It by vanadic anhydride preparation, the configuration of sapphire housing design, carbon nano tube suspension, the injection of suspension with sealing one is
Row step, obtains carrying out the structure of broadband lasing safety, is widely used in visible light wave range and near infrared band laser
In protection technology field.
One of technical scheme is：
A kind of broadband lasing safety method is it is characterised in that comprise the steps：
First, by the use of sapphire as housing, at least in the one side just to laser light incident for the sapphire housing, utilize radio frequency magnetron
Sputtering technology processed deposits vanadium pentoxide films layer, and vanadium pentoxide films layer is more than 50W/mm in laser power density2Strong
Laser undergoes phase transition when irradiating, so that transmitance≤5% of light laser；
Secondly, sapphire housing irrigates carbon nano tube suspension, and make through five oxidations two on the sapphire housing plane of incidence
Vanadium thin layer enter sapphire housing in laser beam all after carbon nano tube suspension from another surface sapphire housing
Another side projects, and the carbon nano tube suspension in sapphire housing produces microbubble to incident light laser after strong laser irradiation
Effectively scattered to reduce the transmitance of light laser further, so that the light laser through sapphire housing aoxidizes two five
Decay more than 84% under the dual function of vanadium thin layer and carbon nano tube suspension.
Described sapphire material housing is through polishing, has very excellent surface topography, rms surface is coarse
Spend and be maintained at below 3nm, and first dip in cleaning agent with Cotton Gossypii before carrying out magnetron sputtering deposition and gently clean sapphire housing
Then it distinguished sonic oscillation at least 20 min, then sapphire shell in acetone and ethanol by the dust on surface and granule
Body is cleaned by ultrasonic at least 20 min in deionized water.
Described vanadium pentoxide films layer magnetron sputtering deposition parameter be：Oxygen argon flow-rate ratio is 0.11 (1.8/
11.3sccm), base reservoir temperature is 400 DEG C, and sputter temperature is 450 DEG C, and sputtering pressure is 2Pa, and sputtering time is 35 min, splashes
Radio is pressed as 315 V.
Described vanadium pentoxide films layer is that one layer of one-component, color are orange-yellow, have significantly preferentially
Orientation, thickness are the laser protective film based on thermal induced phase transition principle of 300-400nm.
The solvent that described carbon nano tube suspension is adopted is benzene or ethanol solution.
Described carbon nano tube suspension concentration is N=4e14/m, and sample path length is not less than 10mm, and that is, laser is in carbon nanometer
Stroke in pipe suspension is not less than 10mm；When projectile energy is 0.4J/cm, in carbon nano tube suspension, microbubble reaches surely
Determine state incident laser effectively being scattered with required time is 10ns, and the transmitance recording is less than 10%.
Described carbon nano tube suspension slowly should be poured in sapphire housing by inlet, and blend rubber lid capsule will
Suspension carries out sealing preserve.
The two of technical scheme are：
A kind of broadband lasing safety structure, it includes sapphire housing 4, it is characterized in that described sapphire housing 4 just to sharp
On the plane of incidence of radiant, vanadium pentoxide films layer 1 is had by magnetron sputtering method deposition, in sapphire housing 4, be provided with perfusion
The cavity of carbon nano tube suspension 5, this cavity is connected with the liquid injection port 2 of insertion sapphire housing 4, carbon nano tube suspension 5
Injected in described cavity by described liquid injection port 2, be located on the one end outside sapphire housing 4 in described liquid injection port 2 and add
Serum cap capsule 3 is to realize cavity and extraneous isolation.
The thickness of described vanadium pentoxide films layer 1 is 300-400nm, preferential 350 nm.
The invention has the beneficial effects as follows：
The present invention adopts composite multi-component to protect, in conjunction with the band characteristic of various nonlinear optical limiting material at present, by thermic phase
Become optical Limiting and nonlinear scattering method, can more effectively light laser interference signal be decayed, thus realizing to visible ray
Wave band and the protection of near infrared band continuously adjustabe laser.
The inventive method is simple, high yield rate, mature and reliable.
The broadband lasing safety structure of the present invention can be as optical window, for photoelectricity investigation, cannon, aircraft navigation
In the systems such as missile guidance.The present invention provide broadband lasing safety assembly preparation method mature and reliable, process time short,
Can play in lasing safety field and optics smart window and widely apply.
Brief description
Fig. 1 is facing and side-looking schematic diagram of the broadband lasing safety structure of the present invention.
Fig. 2 is this is distant broadband lasing safety structure detection schematic diagram.
Fig. 3 is transmitance variation diagram before and after 1024nm Laser interferometers of the present invention.
Specific embodiment
With reference to embodiment, the present invention is further illustrated.
A kind of preparation method of broadband lasing safety structure, comprises the steps：
（1）First sapphire material is polished, conjunction there is very excellent surface topography, rms surface roughness keeps
In below 3nm.Before preparing vanadium oxide film in sapphire material, dip in upper cleaning agent with Cotton Gossypii first and gently clean sapphire
The dust on surface and granule, then by it in acetone and ethanol respectively sonic oscillation 20 min, then sapphire go from
It is cleaned by ultrasonic 20 min in sub- water.
（2）Using radio-frequency magnetron sputter method, vanadium pentoxide films are coated with sapphire material, the parameter being adopted
For：Oxygen argon flow-rate ratio is 0.11 (1.8/11.3sccm), and base reservoir temperature is 400 DEG C, and sputter temperature is 450 DEG C, and sputtering pressure is
2Pa, sputtering time is 35 min, and sputtering voltage is 315 V.
（3）Keep the stablizing of technological parameter being coated with the process Chinese medicine moment, and by the thickness of time control thin film, make system
Standby go out thickness be maintained between 300-400 nanometer, most preferably 350nm, and can to meet certain combination strong with sapphire
Degree requires.Obtained vanadium pentoxide films layer is that one layer of one-component, color are orange-yellow, have and significantly preferentially take
To the laser protective film based on thermal induced phase transition principle.
（4）According to certain component ratio, configure carbon nano tube suspension, solvent selects benzole soln or ethanol solution（Carbon
Scattering coefficient in ethanol solution for the nanotube is bigger, and the absorbance of incident laser is lower, light laser signal can be carried out bigger
Decay in degree）, by stirring rod by solution stirring uniformly, make carbon nano tube suspension concentration be N=4e14/ m, incident energy
When measuring as 0.4J/cm, in carbon nano tube suspension, microbubble reaches steady statue incident laser is effectively scattered and taken
Between be 10ns, the transmitance recording be less than 10%, sample path length be 10mm, that is, in Fig. 1 left figure carbon nanometer visitor suspension width,
Namely stroke in carbon nano suspending liquid for the laser.
（5）In order to avoid splashing, suspension slowly should be poured in sapphire housing 4 by inlet 2；Suspension 5 is in shell
Pass through serum cap capsule 3 sealing preserve in body 4.
（6）Sapphire housing uses acetone and alcohol wipe clean respectively.Can be suspended from the detection means shown in Fig. 2 and carry out
Detection.
Titanium dioxide two vanadium thin film is to be prepared from the enterprising excessively specific technological parameter of sapphire material, has certain knot
Close intensity and actual printing opacity requires, and can undergo phase transition when broadband light laser signal disturbs, play the effect of protection.For
Prepare that component is pure, degree of crystallinity is high and the vanadium oxide film of excellent optical characteristics, will keep in the moment in magnetron sputtering process
The stablizing of technological parameter；The carbon nano tube suspension configuring wants mix homogeneously, will seal guarantor at once after injection sapphire housing
Deposit, become the second layer protective barrier of decay Laser interferometers signal.
Detection example 1.
As Fig. 2, the 635nm red laser of 10W is placed as incident light source in the front end of the safeguard structure shown in Fig. 1,
, as signal receiving end, by adjusting the intensity of laser, test safeguard structure is by before Irradiation of High for PVM type photodetector
The change of transmitance afterwards.In visible ray and near, middle-infrared band, vanadium pentoxide films undergo phase transition the time used and exist
Within 3ms, in carbon nano tube suspension, microbubble reaches steady statue and is effectively scattered required time to incident laser and is
10ns, that is, the protection response time of composite protection structure is within 3ms.
Detection example 2.
As Fig. 2, the 1024nm optical fiber laser of 20W is placed as incident light source in the front end of the safeguard structure shown in Fig. 1,
, as signal receiving end, by adjusting the intensity of laser, test safeguard structure is by before Irradiation of High for PVM type photodetector
The change of transmitance afterwards.Record in light laser signal（50W/mm2）The light transmission rate of predose thin film is 91%, after irradiation
Light transmission rate is 5%, and attenuation amplitude is up to 86%（See Fig. 3）.
Detection example 3.
As Fig. 2, the 635nm red laser of 10W is placed as incident light source in the front end of the safeguard structure shown in Fig. 1,
, as signal receiving end, by adjusting the intensity of laser, test safeguard structure is by before Irradiation of High for PVM type photodetector
The change of transmitance afterwards.Record in light laser signal（50W/mm2）The light transmission rate of predose thin film is 87%, after irradiation
Light transmission rate is 3%, and decay reaches 84%.
Detection example 4.
As Fig. 2, the 532nm green (light) laser of 15W is placed as incident light source in the front end of the safeguard structure shown in Fig. 1,
, as signal receiving end, by adjusting the intensity of laser, test safeguard structure is by before Irradiation of High for PVM type photodetector
The change of transmitance afterwards.Record in light laser signal（50W/mm2）The light transmission rate of predose thin film is 88%, after irradiation
Light transmission rate is 3%, and decay reaches 85%.
Embodiment two.
As shown in Figure 1.
A kind of broadband lasing safety structure, it includes sapphire housing 4, and described sapphire housing 4 is just to laser light
Thickness is had to be 300-400nm by magnetron sputtering method deposition on the plane of incidence in source（Most preferably 350 nm）Vanadium pentoxide films
Layer 1, is provided with the cavity of perfusion carbon nano tube suspension 5, the note of this cavity and insertion sapphire housing 4 in sapphire housing 4
Liquid mouth 2 is connected, and carbon nano tube suspension 5 is injected in described cavity by described liquid injection port 2, is located in described liquid injection port 2
Serum cap capsule 3 is added on the one end outside sapphire housing 4 to realize cavity and extraneous isolation.The safeguard structure of the present invention
Actually detected device as shown in Figure 2.
Part that the present invention does not relate to is same as the prior art or can be realized using prior art.
Claims (9)
1. a kind of broadband lasing safety method is it is characterised in that comprise the steps：
First, by the use of sapphire as housing, at least in the one side just to laser light incident for the sapphire housing, utilize radio frequency magnetron
Sputtering technology processed deposits vanadium pentoxide films layer, and vanadium pentoxide films layer is more than 50W/mm in laser intensity2Light laser
Undergo phase transition during irradiation, so that transmitance≤5% of light laser；
Secondly, sapphire housing irrigates carbon nano tube suspension, and make through five oxidations two on the sapphire housing plane of incidence
Vanadium thin layer enter sapphire housing in laser beam all after carbon nano tube suspension from another surface sapphire housing
Another side projects, and the carbon nano tube suspension in sapphire housing produces microbubble to incident light laser after strong laser irradiation
Effectively scattered to reduce the transmitance of light laser further, so that the light laser through sapphire housing aoxidizes two five
Decay more than 84% under the dual function of vanadium thin layer and carbon nano tube suspension.
2. method according to claim 1, is characterized in that described sapphire material housing is through polishing, has very
Excellent surface topography, rms surface roughness is maintained at below 3nm, and is first dipped in Cotton Gossypii before carrying out magnetron sputtering deposition
Dust and the granule of sapphire surface of shell is gently cleaned in upper cleaning agent, then it ultrasonic respectively in acetone and ethanol shakes
Swing at least 20 min, then sapphire housing is cleaned by ultrasonic at least 20 min in deionized water.
3. method according to claim 1 is it is characterised in that described vanadium pentoxide films layer magnetron sputtering deposition is joined
Number is：Oxygen argon flow-rate ratio is 0.11 (1.8/11.3sccm), and base reservoir temperature is 400 DEG C, and sputter temperature is 450 DEG C, sputtering pressure
For 2Pa, sputtering time is 35 min, and sputtering voltage is 315 V.
4. method according to claim 1 is it is characterised in that described vanadium pentoxide films layer is one layer of one-component
, color be orange-yellow, have obvious preferred orientation, thickness be 300-400nm the laser based on thermal induced phase transition principle prevent
Cuticula.
5. method according to claim 1 is it is characterised in that the solvent that described carbon nano tube suspension is adopted is benzene
Or ethanol solution.
6. method according to claim 1 is it is characterised in that described carbon nano tube suspension concentration is N=4e14/m,
Sample path length is not less than 10mm, and that is, stroke in carbon nano tube suspension for the laser is not less than 10mm；Projectile energy is 0.4J/cm
When, in carbon nano tube suspension, microbubble reach steady statue effectively to be scattered required time to incident laser is 10ns, surveys
The transmitance obtaining is less than 10%.
7. method according to claim 1 is it is characterised in that described carbon nano tube suspension should by inlet slowly
Pour in sapphire housing, suspension is carried out sealing preserve by blend rubber lid capsule.
8. a kind of broadband lasing safety structure, it includes sapphire housing（4）, it is characterized in that described sapphire housing（4）
Just on the plane of incidence of LASER Light Source, vanadium pentoxide films layer is had by magnetron sputtering method deposition（1）, in sapphire housing（4）
In be provided with perfusion carbon nano tube suspension（5）Cavity, this cavity and insertion sapphire housing（4）Liquid injection port（2）It is connected,
Carbon nano tube suspension（5）By described liquid injection port（2）Inject in described cavity, in described liquid injection port（2）Positioned at sapphire
Housing（4）Serum cap capsule is added on outer one end（3）To realize cavity and extraneous isolation.
9. broadband lasing safety structure according to claim 8, is characterized in that described vanadium pentoxide films layer（1）
Thickness be 300-400nm.
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| CN201610817167.6A CN106403721B (en) | 2016-09-12 | 2016-09-12 | A kind of broadband lasing safety method and structure |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108572468A (en) * | 2017-03-13 | 2018-09-25 | 深圳大学 | A kind of intelligence laser protection mirror |
| CN108731823A (en) * | 2017-04-20 | 2018-11-02 | 清华大学 | A kind of THz wave means of communication |
| CN109917498A (en) * | 2017-12-12 | 2019-06-21 | 中国科学院上海硅酸盐研究所 | The lasing safety structure of dual-mode intelligent response and the optical detector for having the structure |
| CN111929758A (en) * | 2020-08-12 | 2020-11-13 | 中国科学院长春光学精密机械与物理研究所 | Laser protective equipment and protective system |
| CN112068234A (en) * | 2020-09-10 | 2020-12-11 | 天津津航技术物理研究所 | Intelligent protection narrowband optical filter |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108572468A (en) * | 2017-03-13 | 2018-09-25 | 深圳大学 | A kind of intelligence laser protection mirror |
| CN108731823A (en) * | 2017-04-20 | 2018-11-02 | 清华大学 | A kind of THz wave means of communication |
| CN108731823B (en) * | 2017-04-20 | 2020-02-07 | 清华大学 | Terahertz wave communication method |
| CN109917498A (en) * | 2017-12-12 | 2019-06-21 | 中国科学院上海硅酸盐研究所 | The lasing safety structure of dual-mode intelligent response and the optical detector for having the structure |
| CN109917498B (en) * | 2017-12-12 | 2020-01-17 | 中国科学院上海硅酸盐研究所 | Dual-mode intelligent response laser protection structure and optical detector with same |
| CN111929758A (en) * | 2020-08-12 | 2020-11-13 | 中国科学院长春光学精密机械与物理研究所 | Laser protective equipment and protective system |
| CN112068234A (en) * | 2020-09-10 | 2020-12-11 | 天津津航技术物理研究所 | Intelligent protection narrowband optical filter |
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| CN106403721B (en) | 2018-10-16 |
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