CN108521069A - A kind of ultrafast laser non-coherent detection and self-stabilization system - Google Patents
A kind of ultrafast laser non-coherent detection and self-stabilization system Download PDFInfo
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- CN108521069A CN108521069A CN201810197369.4A CN201810197369A CN108521069A CN 108521069 A CN108521069 A CN 108521069A CN 201810197369 A CN201810197369 A CN 201810197369A CN 108521069 A CN108521069 A CN 108521069A
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- 238000001514 detection method Methods 0.000 title claims abstract description 16
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- 230000001427 coherent effect Effects 0.000 title description 3
- 238000000034 method Methods 0.000 claims abstract description 30
- 238000011160 research Methods 0.000 claims abstract description 19
- 238000005516 engineering process Methods 0.000 claims abstract description 15
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- 239000006185 dispersion Substances 0.000 claims abstract description 9
- 238000006073 displacement reaction Methods 0.000 claims abstract description 9
- 230000005611 electricity Effects 0.000 claims abstract description 9
- 238000012544 monitoring process Methods 0.000 claims abstract description 8
- 230000006641 stabilisation Effects 0.000 claims abstract description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract 2
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Classifications
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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
- H01S3/11—Mode locking; Q-switching; Other giant-pulse techniques, e.g. cavity dumping
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J11/00—Measuring the characteristics of individual optical pulses or of optical pulse trains
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Abstract
The present invention proposes a kind of irrelevant detection of ultrafast laser and self stabilization method, utilizes the respective function relationship in standard autocorrelation function analyzer scaling method research pulse duration and multi-photon photodetector output level.To which by the output voltage for monitoring multi-photon photodetector in real time, laser pulse duration can be obtained indirectly.The prism made using fused silica material is to Dispersion managed system adjustment laser pulse width.It is connected together with the pulsewidth of multi-photon photodetector monitoring system in conjunction with Computer Control Technology, carries out closed-loop control, realize the stabilization of pulse width.Establish the correspondence between electricity driving displacement platform position, pulse width and multi-photon photodetector output voltage, embedded software system is developed accordingly, it realizes and electricity driving displacement platform is efficiently controlled by multi-photon photodetector output voltage feedback signal, and then change chromatic dispersion compensation quantity, to accurately adjust, stable pulse width.
Description
Technical field
The invention belongs to the irrelevant field of detecting of laser.It is related to a kind of irrelevant detection of ultrafast laser and self-stabilization system,
It is proposed that a kind of ultrafast pulse detects, feedback, controls new method, including the detection of irrelevant ultrafast pulse, Real-time Feedback, Dispersion managed
And etc..
Background technology
There is a kind of new type light source in the 1960s, has that good monochromaticjty, good directionality, coherence is good, energy is concentrated
The features such as.Femtosecond Optical Pulses refer to the duration be 10-12s-10-15The laser pulse of s, this laser pulse have high peak
The characteristics of value power, very wide spectral width and extremely short laser emission time.When femtosecond laser is unique ultrashort lasting with its
Between and superpower peak power started material it is hyperfine, it is low damage and space three-dimensional working process frontier, and application get over
Come wider.According to the ultrashort and superpower feature of femtosecond laser, Applied research fields can be generally divided into ultrafast transient phenomenon
Research and superpower phenomenon research.They are all continuous with the shortening of laser pulse width and the increase of pulse energy
It is able to deeply and develops.The most direct application of femtosecond pulse is that people use it as light source, forms a variety of time resolutions
Spectral technique and pumping/Detection Techniques.Its development directly drive physics, chemistry, biology, material and information science research into
Enter microcosmic ultrafast process field, and started some completely new research fields, such as femtochemistry, is partly led at Quantum control chemistry
Body coherent swpectrum etc..The combination of femtosecond pulse and nanometer microscopy allows people to study the nanostructure of semiconductor
Carrier dynamics in (quantum wire, quantum dot and nanocrystal).In terms of biology, people are utilizing femtosecond laser skill
Molecular dynamics that art is provided, pumping/Detection Techniques, study the biography energy of photosynthesis reaction center, turn can and charge
Separation process.In terms of ultra-short pulse laser is also applied to the transmission, processing and storage of information.
The successful operating for the desk-top terawatt (TW) laser that First is realized using chirped pulse amplification technique starts from 1988, this
Achievement indicates that femtosecond is superpower and the beginning of the strong optical physics research of superelevation in laboratory.In this area research, due to super
The effect of short laser field has been equivalent to or has substantially exceeded the constraint field that electron institute in atom is subject to, and perturbation theory is untenable,
New theoretical treatment is up for development.Under the light intensity of 1020W/cm2, the research of simulation Astronomical Phenomena may be implemented.
The thermoelectron that the superelevation light laser of 1019-1021W/ cm2 generates（200KeV）.Another important application of femtosecond laser is just
It is micro- retrofit.In general, by for laser pulse standard, the duration is more than 10 picoseconds（It is equivalent to heat conduction time）Swash
Light pulse belongs to long pulse, with it come rapidoprint, since fuel factor makes adjacent material change, to influence processing essence
Degree.And pulse width only has the femto-second laser pulse of thousands of part per trillion seconds then to possess unique material processing characteristics, such as adds
The melting zone very little in work aperture does not have；Multiple material may be implemented, such as even life inside metal, semiconductor, transparent material
The micromachined of object tissue etc., engraving；Machining area can be less than focal dimension, break through diffraction limit etc..Some automobiles
Just research is processing better engine nozzle with femtosecond laser at present for manufactory and jumbo processing factory.Use ultrashort pulse
Laser can get hundreds of nanometers of wide apertures on metal.On being most bordering on the Optical Society of America's meeting held Orlando,
The Hai Te of IBM Corporation says that IBM is by a kind of fs-laser system in the photoetching process of large scale integrated chip.With
Femtosecond laser is cut, and is transmitted almost without heat.U.S.'s Lao Lunsi livermore national laboratories it was discovered by researchers that
This laser beam can safely cut high explosive.The Loews gram in the laboratory is said：" femtosecond laser holds promise as a kind of cold place
Science and engineering has, for removing retired rocket, cannon bomb and other weapons.”
Femtosecond laser can be used to cut frangible polymer, without changing its important biochemical characteristic.Biomedical expert
Using it as ultraprecise surgical knife, it is used for vision correcting surgery, can be reduced after tissue damage will not leave behind operation again
Disease is lost, or even can individual cells be moved with delicate surgery or be used for gene therapy.How people also swash femtosecond in research at present
Light is used for dental treatment.There is scientist's discovery, a fritter of tooth can be removed using ultra-short pulse laser, without the object around influencing
Matter.The UMW series ultrafast laser micro Process workbench that Clark-MXR companies of the U.S. release recently exactly represents in this field
The commercial femtosecond laser parallel micromachining system of forefront, it include with ultra-short pulse laser carry out micro Process needed for all facilities
With accessory, it can be used for micro Process any material, generating sub-micron fine structure will not without being damaged to periphery material
Material is caused to splash, processing result is extremely accurate and has high performance reproducibility.
The direct purposes of femtosecond pulse is exactly time-resolved spectroscopy.Physics, chemistry and biology are observed with femtosecond pulse
Equal ultrafast process, femtosecond pulse can make the light source of confocal microscope, to make the three-dimensional image of biological sample.Make light with femtosecond pulse
The three of optical coherence tomography (optical coherence tomography, abbreviation OCT) the observable active somatic cell in source
Image is tieed up, is not the time response using femtosecond pulse at this time, but utilizes the wide spectrum of femtosecond light source, it is similar white to generate
The interference of light, the reflection of the phonon excited in the semiconductors using femtosecond pulse can be used to measure the thickness of semiconductive thin film in real time
Degree, to monitor the growth of semiconductive thin film, makees micro machining with femtosecond pulse, and punched hole is smooth without burr, because
Femtosecond pulse does not melt re-evaporation first by fuel factor, directly evaporates material by high field, femtosecond pulse is used as optic communication
Existing communication speed can be improved hundred times by light source, and femtosecond pulse and the Plasma Interaction of high-energy can produce
Raw higher hamonic wave and X-ray, and it is possibly used for controlled nuclear fusion, the tera hertz that people's also trial is generated with femtosecond pulse
Radiation, to detect the packaging quality of integrated circuit or even the fat content of meat product.
With femtosecond pulse laser it is further development and it is perfect, one surely hews out more application prospects.It is worth
It is noted that whenever research and development to certain phase, just there is a group of people to be separated from research group in the researcher of various countries,
Achievement in research is converted into product, certain original laser company, which also notes that, absorbs new achievement in research.
In terms of national science and technology strategy, the way in the U.S. is to support several key universities and National Laboratory, such as Mi Xi
The ultra-fast optical center of root university, the Strong-field physics laboratory in University of California San Diego branch school, Lao Lunsi-profit object not laboratory
Deng.It is Japanese then be in the form of large-scale " production (industry) official (government office, i.e. National Laboratory) learns (the university) " research project of Ministry of International Trade and Industry,
Started so-called " femtosecond technical plan " in 1996, concentrated Japanese almost all of famous big company, National Laboratory and
University has also pulled on the AT＆T Labs in the U.S., carries out the research of femtosecond pulse technology, target is in billion bit high-speed communication
Technical aspect is come out top.
In femtosecond laser manufacturing field, beam Propagation is positioned to the accuracy of manufacture and its important, domestic Xi'an ray machine institute of quality
Spatial beam flexible transfer technology is used, develops the laser fabrication technology and equipment of large format complex pattern, but manufacture effect
Rate and stability are insufficient；The great development ultrafast laser process unit of metal surface superfine texture is handed in Xi'an, but efficiently and practical
Property has to be hoisted；Dalian University of Science ＆ Engineering can only realize the picture on surface system of small size component using laser, trim Combined Machining Technology
It makes；510, which dominate domestic spacecraft, consolidates the manufacture of surface antenna reflector laser, but can only rely on Russian laser manufacture dress at present
It is standby（It is expensive, nearly 10,000,000）With Xi'an ray machine institute engineering prototype, and process breadth, stability, efficiency do not reach requirement；
For the technology and equipment of engine turbine Part Mark, domestic complete blank.
The laser incising type technology of aero-engine casing class large thin-wall milling part is the core of type aircraft engine manufacture
Heart process, the power performance of relationship engine, aircraft loss of weight is according to gram being calculated at present.Good quarter type technology is to big
Type aerospace component loss of weight has great importance, but currently, the large aerospace space flight all not met the requirements both at home and abroad
Component processes the laser manufacturing equipment of quarter type.For example, the LASERDYNE high-precision multiaxises of foreign countries PRIMA (North America) company exploitation
Laser-processing system has been used to solve the processing problem such as thin-walled parts surface laser quarter type.M.Torres companies
TORRESLASER laser incising type machines integrate for the first time with TORRESTOOL Universal flexibles chucking appliance system, become factory of Air Passenger Germany
First quarter type machine.Up to now, Foreign Laser quarter type equipment is concentrated mainly on the primary quarter type of milling part, can realize three-dimensional illiteracy
The laser incising type of skin class part.The country produces the laser manufacturing equipment for meeting thin-walled parts milling quarter type not yet.Italy
The CO2 laser incising type lathes that PRIMA companies sell to dawn company of China, can be only done quarter first time type, price is more than
10000000, but quarter type loss of weight scarce capacity.
Existing ultrafast laser pulse width measurement method mainly has：Streak camera method, correlation method, frequency resolution optical
Shoulder rotation（FROG）And the relevant electric field Reconstruction Method of self-reference spectrum phase（SPIDFR）.Although above-mentioned means principle phase not to the utmost
Together, but common feature is namely based on autocorrelative impulsive measurement technology.However autocorrelation pulse measuring technique is complicated, it is difficult to
Integrated, therefore, the present invention provides a kind of method of laser simple in structure irrelevant detection and self-stabilization.
Invention content
Existing ultrafast laser pulse width measurement method mainly has：Streak camera method, correlation method, frequency resolution optical
Shoulder rotation（FROG）And the relevant electric field Reconstruction Method of self-reference spectrum phase（SPIDFR）.Although above-mentioned means principle phase not to the utmost
Together, but common feature is namely based on autocorrelative impulsive measurement technology.Common autocorrelation measurement includes：Optical path delay, from phase
Close the parts such as frequency multiplication, spectrographic detection.Optical path delay usually drives mechanical chunking and optical device movement to realize by motor, system
Optically and mechanically complicated, detection process is slow, cumbersome.In laboratory, trained researcher can utilize intensity certainly
Correlator or analogous instrument monitor pulse width, however as the ultrafast laser machining system of commercial Application grade it is not possible that will be above-mentioned
Complicated laser pulse analytical instrument is integrated.Further, since auto-correlation system structure is complicated, it is difficult to other module collection
At, therefore the system function is single, application range has significant limitations.
Therefore for solve existing auto-correlation detector delay of response, complicated, integrated level is low, it is of high cost and solve from
The single problem of correlation detection system function realizes detection, feedback, control closed loop function, proposes that a kind of ultrafast laser is irrelevant
Detection and self-stabilization system.
A kind of irrelevant detect of ultrafast laser generates electric signal with self-stabilization system, Multiphoton Absorbtion.Using standard from phase
Close the respective function relationship in instrument scaling method research pulse duration and multi-photon photodetector output level.To pass through
The output voltage of monitoring multi-photon photodetector in real time, can obtain laser pulse duration indirectly.Utilize tekite
The prism that English material makes is to Dispersion managed system adjustment laser pulse width.In conjunction with Computer Control Technology and multi-photon photoelectricity
The pulsewidth monitoring system of detector connects together, and carries out closed-loop control, realizes the stabilization of pulse width.It is flat to establish electricity driving displacement
Correspondence between platform position, pulse width and multi-photon photodetector output voltage, develops embedded software accordingly
System is realized and efficiently controls electricity driving displacement platform by multi-photon photodetector output voltage feedback signal, and then changes
Chromatic dispersion compensation quantity, to accurately adjust, stable pulse width.
Specific implementation mode
A kind of irrelevant detect of ultrafast laser generates electric signal with self-stabilization system, Multiphoton Absorbtion.Using standard from phase
Close the respective function relationship in instrument scaling method research pulse duration and multi-photon photodetector output level.To pass through
The output voltage of monitoring multi-photon photodetector in real time, can obtain laser pulse duration indirectly.Utilize tekite
The prism that English material makes is to Dispersion managed system adjustment laser pulse width.In conjunction with Computer Control Technology and multi-photon photoelectricity
The pulsewidth monitoring system of detector connects together, and carries out closed-loop control, realizes the stabilization of pulse width.It is flat to establish electricity driving displacement
Correspondence between platform position, pulse width and multi-photon photodetector output voltage, develops embedded software accordingly
System is realized and efficiently controls electricity driving displacement platform by multi-photon photodetector output voltage feedback signal, and then changes
Chromatic dispersion compensation quantity, to accurately adjust, stable pulse width.
For those skilled in the art, above-described embodiment is merely a preferred embodiment of the present invention, and should not be understood as to this hair
The limitation of bright the scope of the claims, under the premise of not departing from the design of the present invention, several improvement for making substitute and belong to this hair
Bright protection domain.
Claims (3)
1. a kind of irrelevant detection of ultrafast laser and self stabilization method are used for laser acquisition, including：It is produced by Multiphoton Absorbtion
Raw electric signal；Standard autocorrelation function analyzer scaling method research pulse duration and multi-photon photoelectricity are utilized according to the electric signal of generation
The respective function relationship of detector output level；By monitoring the output voltage of multi-photon photodetector in real time, by described right
Functional relation is answered to obtain laser pulse duration indirectly.
2. the irrelevant detection of ultrafast laser according to claim 1 and self stabilization method, are made using fused silica material
Prism to Dispersion managed system adjustment laser pulse width；In conjunction with the arteries and veins of Computer Control Technology and multi-photon photodetector
Wide monitoring system connects together, and carries out closed-loop control, and control pulse width is stablized.
3. the irrelevant detection of ultrafast laser according to claim 1 and self stabilization method, establish electricity driving displacement platform position,
Respective function relationship between pulse width and multi-photon photodetector output voltage is developed embedded according to functional relation
Software systems are realized and efficiently control electricity driving displacement platform by multi-photon photodetector output voltage feedback signal；Pass through
Electricity driving displacement platform changes chromatic dispersion compensation quantity, to accurately adjust pulse width.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1379515A (en) * | 2001-04-09 | 2002-11-13 | 中国科学院物理研究所 | Miniaturized femto-second solid laser oscillator |
| CN101246057A (en) * | 2008-03-18 | 2008-08-20 | 中国科学院长春光学精密机械与物理研究所 | Self-correlation instrument for measuring ultra-short laser impulse width |
| CN104121995A (en) * | 2014-07-01 | 2014-10-29 | 华南师范大学 | Device and method for measuring time-domain width of femtosecond pulse |
-
2018
- 2018-03-11 CN CN201810197369.4A patent/CN108521069A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1379515A (en) * | 2001-04-09 | 2002-11-13 | 中国科学院物理研究所 | Miniaturized femto-second solid laser oscillator |
| CN101246057A (en) * | 2008-03-18 | 2008-08-20 | 中国科学院长春光学精密机械与物理研究所 | Self-correlation instrument for measuring ultra-short laser impulse width |
| CN104121995A (en) * | 2014-07-01 | 2014-10-29 | 华南师范大学 | Device and method for measuring time-domain width of femtosecond pulse |
Non-Patent Citations (3)
| Title |
|---|
| 周达君 等: ""验证双光子吸收用于光脉冲宽度测量"", 《中山大学学报（自然科学版）》 * |
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| 颜微子 等: ""双光子自相关测量超短激光脉冲技术的研究"", 《光学与光电技术》 * |
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Application publication date: 20180911 |