CN203824653U - Femtosecond laser pulse width measuring instrument based on molecular ionization detection - Google Patents
Femtosecond laser pulse width measuring instrument based on molecular ionization detection Download PDFInfo
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- CN203824653U CN203824653U CN201420128365.8U CN201420128365U CN203824653U CN 203824653 U CN203824653 U CN 203824653U CN 201420128365 U CN201420128365 U CN 201420128365U CN 203824653 U CN203824653 U CN 203824653U
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- reflection mirror
- femtosecond laser
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Abstract
The utility model discloses a femtosecond laser pulse width measuring instrument based on molecular ionization detection. The femtosecond laser pulse width measuring instrument includes a femtosecond laser pulse beam emission source. A beam splitting sheet is disposed on the same horizontal plane facing the femtosecond laser pulse beam emission source. A femtosecond laser pulse beam passes the beam splitting sheet and then is two beam passages are formed. A femtosecond laser pulse beam passing a plane high reflector mirror C in the first beam channel and a femtosecond laser pulse beam passing a plane high reflector mirror D in the second beam passage, after passing a beam combining sheet, precisely coincide with an ultrasonic molecular beam of a time-of-flight mass spectrometer under the effect of a focusing lens. The femtosecond laser pulse width measuring instrument based on molecular ionization detection is simple and practical, is convenient to adjust and rapid in data acquisition and data processing, and can be adapted to measurement and real-time monitoring of the femtosecond laser pulse widths and pulse shapes having different pulse widths and different wavelengths.
Description
Technical field
The utility model relates to a kind of measurement mechanism of femto-second laser pulse optical parameter, is specifically related to a kind of femtosecond laser pulse width measuring instrument of surveying based on molecular ionization.
Background technology
The research of femtosecond laser and corresponding femtosecond laser technology is along with femto-second laser pulse develops rapidly with going deep in the expansion of the application of the social every field such as scientific research, biology, medical treatment, processing, communication, national defence.The application of one of them importance is to utilize femto-second laser pulse and Femtosecond laser spectroscopy method to carry out the ultrafast dynamics in the various types of materials such as Study on Protein, nano material, semiconductor.Such as, can adopt Study on Protein Structural Dynamics, semiconductor and the nano material charge carrier dynamics such as femtosecond pumping-detection technology and femtosecond stimulated Raman scattering technology.On the other hand, the pulse shape of femtosecond laser and pulse width are important optical parameters in femto-second laser pulse application, and the measurement to it or Real-Time Monitoring are very necessary in a lot of experiment and applications.At present, two important method of impulsive measurement are frequency discrimination photoswitch (Frequency-resolved optical grating is called for short FROG) method and self-reference spectral interference (self-referenced spectral interferometry is called for short SRSI) method, but above-mentioned two kinds of measuring methods are all the pulse measuring methods based on photodetector, and photodetector has certain frequency response range, the method for therefore utilizing traditional optical detector to measure femto-second laser pulse optical parameter is restricted for the frequency of testing laser.
Summary of the invention
The technical matters that the utility model solves has been to provide a kind of simple and practical, easy to adjust, data acquisition and the data processing femtosecond laser pulse width measuring instrument based on molecular ionization detection rapidly, and this device can utilize interference of light effect and laser ionization molecule to measure complicated femto-second laser pulse optical parameter.
The technical solution of the utility model is: a kind of femtosecond laser pulse width measuring instrument of surveying based on molecular ionization, comprise femto-second laser pulse radiation beam source, it is characterized in that: the same level relative with femto-second laser pulse radiation beam source is provided with beam splitting chip, femto-second laser pulse light beam forms twice beam channel after beam splitting chip, wherein first beam channel is provided with plane high reflection mirror A successively along light beam working direction, plane high reflection mirror B and plane high reflection mirror C, second beam channel is provided with plane high reflection mirror D successively along light beam working direction, plane high reflection mirror E and plane high reflection mirror F, described plane high reflection mirror B and plane high reflection mirror C are arranged at and on high-precision electric translation stage, form high-precision optical and postpone platform, by the femto-second laser pulse light beam of first beam channel midplane high reflection mirror C and the femto-second laser pulse light beam by second beam channel midplane high reflection mirror F after closing bundle sheet under the effect of condenser lens with the ultrasonic molecular beam inregister of time of-flight mass spectrometer, described condenser lens is arranged at the rear of closing bundle sheet, time of-flight mass spectrometer is arranged at the rear of condenser lens, described time of-flight mass spectrometer comprises ultrasound molecular beam system, electron gun chamber, ionization chamber, ion lens and micro-channel plate detector, wherein ultrasound molecular beam system is mainly by carrier gas device, admission line and sample cell form, carrier gas device is connected by admission line with sample cell, electron gun chamber is connected with sample cell by admission line, the end of this admission line is provided with pulse valve, the below in electron gun chamber is connected with molecular pump A, molecular pump A is connected with mechanical pump A, described ionization chamber is arranged at a side in electron gun chamber, the below of ionization chamber is connected with molecular pump B, molecular pump B is connected with mechanical pump B, in ionization chamber, be provided with ion lens, this ion lens comprises the pole plate A be arrangeding in parallel successively along ultrasonic molecular beam working direction, pole plate B and pole plate C, described micro-channel plate detector is arranged in the direction relative with ion lens.
The utility model utilizes Labview realization to carry out robotization control to the signal of high-precision electric translation stage and micro-channel plate detector input capture card.
The utlity model has following beneficial effect: 1, utilize interference of light effect to measure complicated femtosecond laser pulse width; 2, the utility model is simple in structure, only utilizes several plane high reflection mirrors just can carry out impulsive measurement and carry out pump probe experiment, has reduced the stability influence that optical element brings, and has improved the reliability and stability of system; 3, compared with previous device, device of the present utility model mainly detects by femtosecond laser ionized molecule, therefore improve significantly the frequency range that femto-second laser pulse is measured, can realize the measurement of deep ultraviolet being arrived to the laser pulse of hundreds of femtosecond to the cycle magnitude of middle infrared excess broadband spectral scope.
Brief description of the drawings
Fig. 1 is light channel structure schematic diagram of the present utility model, and Fig. 2 is the experimental result picture of the utility model 800 nm centre wavelength approximately 50 fs laser pulses.
Drawing explanation: 1, femto-second laser pulse radiation beam source, 2, beam splitting chip, 3, plane high reflection mirror A, 4, plane high reflection mirror B, 5, plane high reflection mirror C, 6, high-precision electric translation stage, 7, plane high reflection mirror D, 8, plane high reflection mirror E, 9, plane high reflection mirror F, 10, close bundle sheet, 11, condenser lens, 12, time of-flight mass spectrometer, 13, ultrasound molecular beam system, 14, electron gun chamber, 15, ionization chamber, 16, ion lens, 17, micro-channel plate detector, 18, carrier gas device, 19, sample cell, 20, admission line, 21, pulse valve, 22, molecular pump A, 23, molecular pump B, 24, mechanical pump A, 25, mechanical pump B, 26, pole plate A, 27, pole plate B, 28, pole plate C.
Embodiment
Describe by reference to the accompanying drawings embodiment in detail.A kind of femtosecond laser pulse width measuring instrument of surveying based on molecular ionization, comprise femto-second laser pulse radiation beam source 1, the same level relative with femto-second laser pulse radiation beam source 1 is provided with beam splitting chip 2, femto-second laser pulse light beam forms twice beam channel after beam splitting chip 2, wherein first beam channel is provided with plane high reflection mirror A 3 successively along light beam working direction, plane high reflection mirror B 4 and plane high reflection mirror C 5, second beam channel is provided with plane high reflection mirror D 7 successively along light beam working direction, plane high reflection mirror E 8 and plane high reflection mirror F 9, described plane high reflection mirror B 4 and plane high reflection mirror C 5 are arranged at and on high-precision electric translation stage 6, form high-precision optical and postpone platform, plane high reflection mirror B 4 and plane high reflection mirror C 5 carry out high precision operation under the drive of high-precision electric translation stage 6 before and after beam direction, by the femto-second laser pulse light beam of first beam channel midplane high reflection mirror C 5 and the femto-second laser pulse light beam by second beam channel midplane high reflection mirror F 9 after closing bundle sheet 10 under the effect of condenser lens 11 with the ultrasonic molecular beam inregister of time of-flight mass spectrometer 12, described condenser lens 11 is arranged at the rear of closing bundle sheet 10, time of-flight mass spectrometer 12 is arranged at the rear of condenser lens 11, described time of-flight mass spectrometer 12 comprises ultrasound molecular beam system 13, electron gun chamber 14, ionization chamber 15, ion lens 16 and micro-channel plate detector 17, wherein ultrasound molecular beam system 13 is mainly by carrier gas device 18, admission line 20 and sample cell 19 form, carrier gas device 18 is connected by admission line 20 with sample cell 19, electron gun chamber 14 is connected with sample cell 19 by admission line 20, the end of this admission line 20 is provided with pulse valve 21, the below in electron gun chamber 14 is connected with molecular pump A 22, molecular pump A 22 is connected with mechanical pump A 24, described ionization chamber 15 is arranged at a side in electron gun chamber 14, the below of ionization chamber 15 is connected with molecular pump B 23, molecular pump B 23 is connected with mechanical pump B 25, in ionization chamber 15, be provided with ion lens 16, this ion lens 16 comprises the pole plate A 26 be arrangeding in parallel successively along ultrasonic molecular beam working direction, pole plate B 27 and pole plate C 28, described micro-channel plate detector 17 is arranged in the direction relative with ion lens 16, the ion that molecule is ionized formation flies to microchannel plate detection 17 under the effect of electric field, finally be connected with the capture card on computing machine by coupled circuit.The utility model utilizes Labview to realize the signal that high-precision electric translation stage 6 and micro-channel plate detector 17 are inputted to capture card to carry out robotization control.
Measure 800 nm centre wavelength approximately 50 fs laser pulses with this measurement mechanism, its measurement result as shown in Figure 2, can realize the measurement of deep ultraviolet being arrived to the laser pulse of hundreds of femtosecond to the cycle magnitude of near infrared ultra-wideband-light spectral limit by this device thus.
More than show and described ultimate principle of the present utility model; principal character and advantage; do not departing under the prerequisite of the utility model spirit and scope, the utility model also has various changes and modifications, and these changes and improvements all fall into claimed scope of the present utility model.
Claims (1)
1. a femtosecond laser pulse width measuring instrument of surveying based on molecular ionization, comprise femto-second laser pulse radiation beam source, it is characterized in that: the same level relative with femto-second laser pulse radiation beam source is provided with beam splitting chip, femto-second laser pulse light beam forms twice beam channel after beam splitting chip, wherein first beam channel is provided with plane high reflection mirror A successively along light beam working direction, plane high reflection mirror B and plane high reflection mirror C, second beam channel is provided with plane high reflection mirror D successively along light beam working direction, plane high reflection mirror E and plane high reflection mirror F, described plane high reflection mirror B and plane high reflection mirror C are arranged at and on high-precision electric translation stage, form high-precision optical and postpone platform, by the femto-second laser pulse light beam of first beam channel midplane high reflection mirror C and the femto-second laser pulse light beam by second beam channel midplane high reflection mirror F after closing bundle sheet under the effect of condenser lens with the ultrasonic molecular beam inregister of time of-flight mass spectrometer, described condenser lens is arranged at the rear of closing bundle sheet, time of-flight mass spectrometer is arranged at the rear of condenser lens, described time of-flight mass spectrometer comprises ultrasound molecular beam system, electron gun chamber, ionization chamber, ion lens and micro-channel plate detector, wherein ultrasound molecular beam system is mainly by carrier gas device, admission line and sample cell form, carrier gas device is connected by admission line with sample cell, electron gun chamber is connected with sample cell by admission line, the end of this admission line is provided with pulse valve, the below in electron gun chamber is connected with molecular pump A, molecular pump A is connected with mechanical pump A, described ionization chamber is arranged at a side in electron gun chamber, the below of ionization chamber is connected with molecular pump B, molecular pump B is connected with mechanical pump B, in ionization chamber, be provided with ion lens, this ion lens comprises the pole plate A be arrangeding in parallel successively along ultrasonic molecular beam working direction, pole plate B and pole plate C, described micro-channel plate detector is arranged in the direction relative with ion lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420128365.8U CN203824653U (en) | 2014-03-21 | 2014-03-21 | Femtosecond laser pulse width measuring instrument based on molecular ionization detection |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420128365.8U CN203824653U (en) | 2014-03-21 | 2014-03-21 | Femtosecond laser pulse width measuring instrument based on molecular ionization detection |
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| CN203824653U true CN203824653U (en) | 2014-09-10 |
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| CN201420128365.8U Expired - Fee Related CN203824653U (en) | 2014-03-21 | 2014-03-21 | Femtosecond laser pulse width measuring instrument based on molecular ionization detection |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103868604A (en) * | 2014-03-21 | 2014-06-18 | 河南师范大学 | Femtosecond laser pulse width measuring device based on molecule ionization detection |
| CN104538276A (en) * | 2014-12-26 | 2015-04-22 | 宁波大学 | Ion source soft ionization device and method under barometric pressure |
| CN113117606A (en) * | 2021-05-28 | 2021-07-16 | 中国科学技术大学 | Beam source control device for precisely adjusting direction and position of beam source in vacuum beam source cavity |
-
2014
- 2014-03-21 CN CN201420128365.8U patent/CN203824653U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103868604A (en) * | 2014-03-21 | 2014-06-18 | 河南师范大学 | Femtosecond laser pulse width measuring device based on molecule ionization detection |
| CN104538276A (en) * | 2014-12-26 | 2015-04-22 | 宁波大学 | Ion source soft ionization device and method under barometric pressure |
| CN113117606A (en) * | 2021-05-28 | 2021-07-16 | 中国科学技术大学 | Beam source control device for precisely adjusting direction and position of beam source in vacuum beam source cavity |
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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: 20140910 Termination date: 20150321 |
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| EXPY | Termination of patent right or utility model |