CN203631969U - Device for generating higher harmonic supercontinuum - Google Patents
Device for generating higher harmonic supercontinuum Download PDFInfo
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- CN203631969U CN203631969U CN201320692162.7U CN201320692162U CN203631969U CN 203631969 U CN203631969 U CN 203631969U CN 201320692162 U CN201320692162 U CN 201320692162U CN 203631969 U CN203631969 U CN 203631969U
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- laser
- extreme ultraviolet
- order harmonic
- high order
- harmonic component
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Abstract
The utility model provides a device for generating higher harmonic supercontinuum. The device comprises a femtosecond laser, an optical parameter amplifier, a convergent lens, a vacuum chamber, an incident window, a gas box, an extreme ultraviolet spectrometer and an extreme ultraviolet camera. The optical parameter amplifier is used for converting femtosecond laser into infrared laser with the wavelength of 1.6 micrometers to 2.2 micrometers. A laser beam emitted by femtosecond laser is converted into infrared laser with tunable wavelength through the optical parameter amplifier. The infrared laser is focused through the convergent lens and then passes through the incident window to be in interaction with inert gas in the gas box in the vacuum chamber, and the higher harmonic supercontinuum is generated. According to the device for generating higher harmonic supercontinuum, single path laser with a double-peak spectrum structure is utilized, the inert gas can be driven to generate the higher harmonic supercontinuum without period magnitude, and the output of the higher harmonic supercontinuum is optimized though driving the tuning of laser chirp.
Description
Technical field
The utility model relates to the generation of extreme ultraviolet-grenz ray super continuous spectrums, particularly interacts and the high order harmonic component super continuous spectrums of generation based on laser and gas, is specifically related to a kind of device that produces high order harmonic component super continuous spectrums.
Background technology
High order harmonic component super continuous spectrums is mainly used in the generation of ultrashort chirped pulse, and the detection of the extreme ultraviolet-grenz ray of material.At present, the method that produces high order harmonic component super continuous spectrums mainly contains two classes, one class is to utilize the ultrashort femto-second laser pulse of cycle magnitude and gas interaction to produce, the ultrashort femto-second laser pulse of related cycle magnitude only has several femtoseconds (only comprising the photoperiod one or two), and this ultrashort pulse utmost point difficult labour is raw and performance is unstable; Another kind of is to utilize two-color laser field or dipulse time gate to realize the generation of high order harmonic component super continuous spectrums, and it is tuning that this method relates to Optical Field Superposition and the time delay of two-way or multi-path laser, is scheme or operates all more complicated.
Utility model content
The purpose of this utility model is to provide a kind of device that produces high order harmonic component super continuous spectrums, and the device of this generation high order harmonic component super continuous spectrums just can drive inert gas to produce high order harmonic component super continuous spectrums without the single channel laser of cycle magnitude.
Technical solution of the present utility model is as follows:
A kind of device that produces high order harmonic component super continuous spectrums, comprise femto-second laser, photoparametric amplifier, plus lens, vacuum cavity, incidence window, gas box, extreme ultraviolet spectrometer and extreme ultraviolet camera, described incidence window is arranged at the entrance of vacuum cavity, described gas box, extreme ultraviolet spectrometer and extreme ultraviolet camera are all arranged in vacuum cavity, in described gas box, have inert gas;
Described femto-second laser is 800nm for generation of wavelength, the femtosecond laser that pulsewidth is femtosecond; Described photoparametric amplifier is for converting described femtosecond laser to the tunable infrared laser that possesses broadband two peak structure that wavelength is 1.6～2.2 μ m;
The laser beam of femto-second laser transmitting, be converted to the infrared laser of tunable wave length through photoparametric amplifier, described infrared laser focuses on through plus lens, after seeing through afterwards incidence window, interact with the inert gas being placed in the gas box in vacuum cavity, produce high order harmonic component super continuous spectrums;
Described extreme ultraviolet spectrometer is for resolving and differentiate high order harmonic component super continuous spectrums; Described extreme ultraviolet camera is for taking and demonstration high order harmonic component super continuous spectrums.
Further setting of the present utility model is, described gas box is made up of thin-wall steel tube, the sealing of described thin-wall steel tube one end, and the other end taps into device of air; Laser focusing after described plus lens focuses on can puncture described thin-wall steel tube, interacts with the inert gas in thin-wall steel tube.
The utility model looks for another way, utilization has the single channel laser of bimodal spectral composition, and (its effect is equivalent to double-colored stack, but without light path stack), without cycle magnitude, can drive inert gas to produce high order harmonic component super continuous spectrums, and by the tuning output of optimizing high order harmonic component super continuous spectrums of driving laser chirp value.When specific implementation, the bimodal spectral composition in the broadband of infrared laser is to regulate to realize by the off resonance of the functional crystal in photoparametric amplifier, and the chirp value optimization of infrared laser is to realize by the position adjustments of the time delay grating in femto-second laser.Compared with prior art, apparatus and method described in the utility model are all simpler.The radiation of this high order harmonic component super continuous spectrums can be used for the generation of ultrashort chirped pulse, and the field such as the extreme ultraviolet waveband dynamics research of material, is widely used.
Brief description of the drawings
Fig. 1 is device schematic diagram of the present utility model;
Fig. 2 is wavelength conversion schematic diagram of the present utility model;
Fig. 3 is principle of adjustment and control schematic diagram of the present utility model.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the utility model is described in further detail, but should not limit protection range of the present utility model with this.
As shown in Figure 1, the utility model provides a kind of device that produces high order harmonic component super continuous spectrums, comprises femto-second laser 1, photoparametric amplifier 2, plus lens 3, vacuum cavity 4, incidence window 5, gas box 6, extreme ultraviolet spectrometer 7 and extreme ultraviolet camera 8; Described incidence window 5 is arranged at the entrance of vacuum cavity 4, and described gas box 6, extreme ultraviolet spectrometer 7 and extreme ultraviolet camera 8 are all arranged in vacuum cavity 4, in described gas box 6, has inert gas.
Described femto-second laser 1 is for generation of the ultrashort laser pulse of wavelength 800nm, pulsewidth tens femtoseconds; Described photoparametric amplifier 2(English name: OpticalParametricAmplifier, abbreviation: OPA) produce amplification principle by optical parameter and 800nm femtosecond laser is converted to 1.6～2.2 μ m are tunable to be possessed broadband two peak structure (spectrum is more wide better, and there are two spectrum peaks) infrared laser, this infrared laser is through plus lens 3 and see through after incidence window 5 with the inert gas being placed in the gas box 6 of vacuum cavity 4 and interact, thereby produces high order harmonic component super continuous spectrums; Described gas box 6 forms (steel pipe one end seals, and the other end taps into device of air, and the inert gas that laser focusing can puncture in Steel Thin-Wall wall and thin-wall steel tube steel pipe interacts) by thin-wall steel tube; Described extreme ultraviolet spectrometer 7 is for resolving and differentiate high order harmonic component super continuous spectrums; Described extreme ultraviolet camera 8 is for taking and demonstration high order harmonic component super continuous spectrums.
The high order harmonic spectrum that gas box 6 is exported does not spatially not launch according to spectral component, and after extreme ultraviolet spectrometer 7, spectral component has spatially been resolved out, the spectrum that extreme ultraviolet camera 8 just can photograph heterogeneity expansion spatially.Be white like sunlight, only have through dispersing prism, seven colours of white light the inside spatially could be distinguished, the function of Here it is spectrometer.Extreme ultraviolet spectrometer 7 does not need to regulate in experimentation, solidifies, as long as light path is imported, output is the spatial spectrum spatially launching by spectral component, then takes and shows with extreme ultraviolet camera 8.
Adopt said apparatus to produce the method for high order harmonic component super continuous spectrums, comprise the steps:
(1) producing wavelength by femto-second laser 1 is 800nm, the femtosecond laser that pulsewidth is femtosecond;
(2) described femtosecond laser is input to photoparametric amplifier 2, regulates the spectrum of the infrared laser of optimizing photoparametric amplifier output by the off resonance of the functional crystal in photoparametric amplifier 2, make it possess broadband two peak structure;
(3) infrared laser that possesses broadband two peak structure described in guiding enters vacuum cavity 4, and interacts with inert gas, produces high order harmonic component spectrum;
(4) open extreme ultraviolet camera 8, the high order harmonic component spectrum picture that acquisition step (3) produces;
(5) the high order harmonic component spectrum picture collecting according to step (4), optimizes the chirp value of infrared laser by the position adjustments of the time delay grating in femto-second laser 1, until export required high order harmonic component super continuous spectrums.
Fig. 2 is wavelength conversion schematic diagram of the present utility model, first produces 800nm femtosecond laser by femto-second laser 1, and its time chirp value can be optimized by the position adjustments of the time delay grating in femto-second laser 1; Then, this 800nm femtosecond laser converts the required tunable infrared laser of 1.6～2.2 μ m to by photoparametric amplifier 2, and the bimodal spectral composition in its broadband can regulate to realize by the off resonance of the functional crystal in photoparametric amplifier; Finally, the inert gas in this infrared laser and gas box 6 interacts to produce High-order Harmonic Generation, and the division-continuation property of this radiation can regulate to optimize by the above-mentioned position adjustments of time delay grating and the off resonance of functional crystal.
Fig. 3 is principle of adjustment and control schematic diagram of the present utility model, the position adjustments of the time delay grating in femto-second laser 1, the time that can change the 800nm femtosecond laser of its output attribute of warbling, the change of this attribute can have influence on again two peak-to-peak time delay time phase of tunable infrared laser, and the variation of this time delay time phase can have influence on the division-continuation property of high order harmonic component output.
As a specific embodiment of the present utility model, femto-second laser 1 has been selected the titanium jewel femto-second laser of relevant company of the U.S., and its output parameter is 8mJ/45fs/1Kz; Photoparametric amplifier 2 has been selected homemade photoparametric amplifier (English name: OpticalParametric Amplifier, abbreviation: OPA, can be referring to the document OpticsLetters delivering for 2009, Vol.34, No.18); Plus lens 3 has been selected the planoconvex spotlight that focal length is 500mm; Vacuum cavity 4 maintains lower than 1 × 10 by mechanical pump+molecular pump
-3the vacuum degree of Pa, to avoid High-order Harmonic Generation by Atmospheric Absorption; Incidence window 5 has been selected the silica glass material through polishing that 2mm is thick; Be 3mm as the thin-wall steel tube internal diameter of gas box 6, inside is filled with inert gas Ar; Extreme ultraviolet spectrometer 7 is homemade reflecting light grating spectrograph (can referring to the document J.Optics (Paris) delivering for 1994, Vol.25, No.4), for diffraction with differentiate high order harmonic component; Extreme ultraviolet camera 8 is ultraviolet-X ray CCD(model PrincetonInstruments, SX400), can read and show CCD spectrum picture by computer.
Specific experiment operating procedure is as follows:
(1) the good experimental provision of installment and debugging as shown in Figure 1.
(2) after airtight vacuum cavity 4, start mechanical pump+molecular pump, make to maintain and test required vacuum degree in vacuum cavity 4.
(3) open laser system, regulate to optimize the spectrum of infrared laser by the off resonance of the functional crystal in photoparametric amplifier 2, (spectrum is more wide better to make it possess broadband two peak structure, and there are two spectrum peaks), then guide this laser to enter vacuum cavity 4, and interact with inert gas.
(4) open extreme ultraviolet camera 8, gather high order harmonic component spectroscopic data.
(5) observe the high order harmonic component spectrum picture collecting, realize the chirp value optimization of infrared laser by the position adjustments of the time delay grating in femto-second laser 1, until export required high order harmonic component super continuous spectrums.
(6) after experimental implementation finishes, close laser system, airtight vacuum cavity, closes all the other all devices.
Claims (2)
1. one kind produces the device of high order harmonic component super continuous spectrums, it is characterized in that, comprise femto-second laser (1), photoparametric amplifier (2), plus lens (3), vacuum cavity (4), incidence window (5), gas box (6), extreme ultraviolet spectrometer (7) and extreme ultraviolet camera (8), described incidence window (5) is arranged at the entrance of vacuum cavity (4), described gas box (6), extreme ultraviolet spectrometer (7) and extreme ultraviolet camera (8) are all arranged in vacuum cavity (4), and described gas box has inert gas in (6);
Described femto-second laser (1) is 800nm for generation of wavelength, the femtosecond laser that pulsewidth is femtosecond; Described photoparametric amplifier (2) is for converting described femtosecond laser to the tunable infrared laser that possesses broadband two peak structure that wavelength is 1.6～2.2 μ m;
The laser beam of femto-second laser (1) transmitting, be converted to the infrared laser of tunable wave length through photoparametric amplifier (2), described infrared laser focuses on through plus lens (3), after seeing through afterwards incidence window (5), the interior interior inert gas of gas box (6) interacts with being placed in vacuum cavity (4), produces high order harmonic component super continuous spectrums;
Described extreme ultraviolet spectrometer (7) is for resolving and differentiate high order harmonic component super continuous spectrums; Described extreme ultraviolet camera (8) is for taking and demonstration high order harmonic component super continuous spectrums.
2. the device of generation high order harmonic component super continuous spectrums according to claim 1, is characterized in that, described gas box (6) is made up of thin-wall steel tube, the sealing of described thin-wall steel tube one end, and the other end taps into device of air; Laser focusing after described plus lens (3) focuses on can puncture described thin-wall steel tube, interacts with the inert gas in thin-wall steel tube.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320692162.7U CN203631969U (en) | 2013-11-05 | 2013-11-05 | Device for generating higher harmonic supercontinuum |
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| CN201320692162.7U CN203631969U (en) | 2013-11-05 | 2013-11-05 | Device for generating higher harmonic supercontinuum |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103560388A (en) * | 2013-11-05 | 2014-02-05 | 温州大学 | Device and method for producing high-order harmonic super-continuum spectrum |
| CN106908950A (en) * | 2017-03-16 | 2017-06-30 | 中国科学院西安光学精密机械研究所 | A kind of electromagnetic radiation generation device and its application method |
| WO2018015952A1 (en) * | 2016-07-21 | 2018-01-25 | B. G. Negev Technologies And Applications Ltd., At Ben-Gurion University | Multidimensional nanotomography with high harmonics and attosecond pulses |
-
2013
- 2013-11-05 CN CN201320692162.7U patent/CN203631969U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103560388A (en) * | 2013-11-05 | 2014-02-05 | 温州大学 | Device and method for producing high-order harmonic super-continuum spectrum |
| CN103560388B (en) * | 2013-11-05 | 2016-07-20 | 温州大学 | A kind of apparatus and method producing higher hamonic wave super continuous spectrums |
| WO2018015952A1 (en) * | 2016-07-21 | 2018-01-25 | B. G. Negev Technologies And Applications Ltd., At Ben-Gurion University | Multidimensional nanotomography with high harmonics and attosecond pulses |
| US10724952B2 (en) | 2016-07-21 | 2020-07-28 | B.G. Negev Technologies And Applications Ltd. At Ben-Gurion University | Multidimensional nanotomography with high harmonics and attosecond pulses |
| CN106908950A (en) * | 2017-03-16 | 2017-06-30 | 中国科学院西安光学精密机械研究所 | A kind of electromagnetic radiation generation device and its application method |
| CN106908950B (en) * | 2017-03-16 | 2023-02-14 | 中国科学院西安光学精密机械研究所 | Electromagnetic radiation generating device and using method thereof |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140604 Termination date: 20141105 |
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| EXPY | Termination of patent right or utility model |