CN103091260A - System for controlling femtosecond laser two-dimensional infrared spectroscopy device - Google Patents
System for controlling femtosecond laser two-dimensional infrared spectroscopy device Download PDFInfo
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- CN103091260A CN103091260A CN2013100407884A CN201310040788A CN103091260A CN 103091260 A CN103091260 A CN 103091260A CN 2013100407884 A CN2013100407884 A CN 2013100407884A CN 201310040788 A CN201310040788 A CN 201310040788A CN 103091260 A CN103091260 A CN 103091260A
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Abstract
The invention relates to a system for controlling a femtosecond laser two-dimensional infrared spectroscopy device. The system is characterized by comprising a computer and a data collection card, wherein the data collection card receives a multi-channel pulse spectrum signal via an infrared array detector, and transmits to the computer; a control system is arranged inside the computer and comprises an electric translation stage control unit, a femtosecond pulse integration control unit, a monochromator control unit, a data analysis treatment unit and a signal real-time display unit; the electric translation stage control unit controls the electric translation stage to move according to set parameters; the monochromator control unit controls an input light slit, the grating type and a center wavelength of a monochromator; the femtosecond pulse integration control unit integrates the collected signal, accumulates for a plurality of times, and then respectively transmits to the data analysis treatment unit and the signal real-time display unit; the data analysis treatment unit processes the received spectrum signal; and the signal real-time display unit is used for displaying the signal output by the femtosecond pulse integration control unit in real time. The system can be widely applied to a control process of the femtosecond laser two-dimensional spectroscopy device.
Description
Technical field
The present invention relates to a kind of system that controls the infrared spectrum device, particularly about a kind of system that controls femtosecond laser two-dimensional infrared spectral device.
Background technology
The femtosecond laser two-dimensional infrared spectral technique that occurs in recent years is that the excited vibration photon echo that produces under the ultrafast infrared laser pulses effect of the three beams of molecular system in time domain responds through the expression in two-dimensional frequency after two-dimensional Fourier transform.It has as a kind of forward position spectroscopy means of novelty the ability of measuring condensed phase molecule dynamic structure with the femtosecond time resolution rate.The two-dimensional infrared spectral technique is a kind of emerging molecule dynamic structure detection means, also there is no at present commercial instrument, and its core light path and package unit all need to be built in the laboratory voluntarily.Controlling the coordinate operation of critical piece in light path and collection and the analyzing and processing of spectroscopic data, is the key that the two-dimensional infrared spectral device runs well.Therefore, a cover is simple, the system of the control femtosecond laser two-dimensional infrared spectral device of high efficiency smart in the urgent need to developing.
Summary of the invention
For the problems referred to above, the purpose of this invention is to provide the control system that a kind of intelligent comprehensive is entirely coordinated the femtosecond laser two-dimensional infrared spectral device of the multiple parts of control.
For achieving the above object, the present invention takes following technical scheme: a kind of system that controls femtosecond laser two-dimensional infrared spectral device, it includes a femto-second laser, a light-splitting device, some catoptrons, some to corner reflector, total reflector, focus lamp, sample cell, monochromator and infrared array detector, and every a pair of described corner reflector all is fixedly installed on a motorized precision translation stage; Described femto-second laser emission femtosecond laser is to described light-splitting device, described light-splitting device is divided into femtosecond laser some bundles and it is sent to respectively each described catoptron, light Vertical Launch through each described mirror reflects arrives each to corner reflector, every a pair of described corner reflector reflexes to described focus lamp through described total reflector again after femtosecond laser is reflected, described focus lamp focuses on described sample cell with each light beam, sends to described infrared array detector through the flashlight of described sample cell outgoing through described monochromator; It is characterized in that: it also comprises a computing machine and a data collecting card, the hyperchannel Pulse Spectral Signal that described data collecting card collection is received by described infrared array detector, and send it to described computing machine; One control system is set in described computing machine, and it comprises a motorized precision translation stage control module, a femtosecond pulse integration control unit, a monochromator control module, a data analysis processing unit and the real-time display unit of a signal; Described motorized precision translation stage control module is controlled each described motorized precision translation stage motion according to the parameter of setting; Described monochromator control module is controlled input optical slits, grating type and the centre wavelength of monochromator; The signal that described femtosecond pulse integration control unit gathers described data collecting card carries out integration, repeatedly cumulatively is averaged rear described data analysis processing unit and the real-time display unit of signal of sending to respectively; Described data analysis processing unit is processed the spectral signal that receives according to requirement of experiment; The real-time display unit of described signal shows in real time to the signal of described femtosecond pulse integration control unit output, and the experimenter is according to the signal to noise ratio (S/N ratio) monitoring test result of signal.
Described motorized precision translation stage control module includes the electric translation estrade control module identical with described motorized precision translation stage quantity, and each described electric translation estrade control module is used for controlling corresponding motorized precision translation stage motion; Each described electric translation estrade control module comprises that a parameter arranges module, a SCAN button and a STOP button; Described parameter arranges module and is used for the position of making zero, current location, reference position, moving step length, translational acceleration and the final position of motorized precision translation stage are arranged, and scanning is with the SCAN pushbutton enable, by the scan operation of STOP button real-time interrupt.
The moving step length of described motorized precision translation stage adopts femtosecond to show.
Described infrared array detector is comprised of the multichannel mercury cadmium telluride unit of one dimension.
the present invention is owing to taking above technical scheme, it has the following advantages: 1, control system of the present invention is owing to being provided with the motorized precision translation stage control module, be provided with the some electric translation estrade control modules corresponding with motorized precision translation stage quantity in the motorized precision translation stage control module, each electric translation estrade control module can realize selection and the control to functions such as motorized precision translation stage position and scanning steps, in addition, the moving step length unit of the motorized precision translation stage in the present invention can be scaled femtosecond and represent under the prerequisite that guarantees precision, bring great convenience for the experimental implementation of femtosecond laser two-dimensional infrared spectrum.2, the present invention owing to being provided with the monochromator control module, therefore can realize that grating and the grating wavelength to monochromator selected in the operational process of two-dimensional infrared spectrometer, satisfies the requirement of different-waveband experiment.3, the present invention arranges femtosecond pulse integration control unit, gather when therefore can realize multi-channel data, the data that gather can be the steady-state light signals when sample and n.s. are arranged, can be also the excited vibration photon echo signal of sample under the multi-pulse laser effect, i.e. transient state light signal.4, the present invention owing to being provided with the data analysis processing unit, therefore can be converted to stable state one dimension infrared spectrum and transient state two-dimensional infrared spectrum by the stable state that obtains or transient state light signal.5, the present invention is provided with signal and realizes display unit, and the spectroscopic data that therefore can real-time monitored gathers can carry out Real-Time Monitoring to experimentation.The present invention can be widely used in the control procedure of femtosecond laser two-dimension spectrum device.
Description of drawings
Fig. 1 is the principle schematic of femtosecond laser two-dimensional infrared spectral device, and the direction of arrow represents the direction of motion of motorized precision translation stage;
Fig. 2 is control method schematic flow sheet of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in detail.
As shown in Figure 1, femtosecond laser two-dimensional infrared spectral device involved in the present invention comprises a femto-second laser 1, a light-splitting device 2, some catoptrons 3, some to corner reflector 4, a total reflector 5, a focus lamp 6, a sample cell 7, a spectrometer 8(spectrometer employing of the present invention monochromator 8) and an infrared array detector 9.every pair of horns catoptron 4 all is fixedly installed on a motorized precision translation stage, and each motorized precision translation stage can drive corresponding corner reflector 4 and seesaw, and is used for changing light path, femto-second laser 1 is launched femtosecond pulse to light-splitting device 2 as infrared light supply, light-splitting device 2 is divided into femtosecond laser some bundles and sends it to each catoptron 3, through the light Vertical Launch of each catoptron 3 reflections to the corner reflector 4 that is arranged on each catoptron 3 tops, every pair of horns catoptron 4 reflexes to focus lamp 6 through total reflector 5 again after femtosecond laser is reflected, focus lamp 6 focuses on sample cell 7 with each light beam, flashlight through sample cell 7 outgoing sends to infrared array detector 9 through monochromator 8, infrared array detector 9 is used for carrying out the detection of spectral signal.Infrared array detector 9 of the present invention can be comprised of the multichannel mercury cadmium telluride unit of one dimension, also can select single channel or the multichannel detector of different-waveband according to the needs of actual experiment, does not limit at this; Characteristics of the present invention are each device of femtosecond laser two-dimensional infrared spectral device is controlled respectively, it comprises a computing machine and a data collecting card, data collecting card gathers the hyperchannel Pulse Spectral Signal that is received by infrared array detector 9, and sends it to computing machine and process and display.Be provided with a control system in computing machine, it comprises a motorized precision translation stage control module, a femtosecond pulse integration control unit, a monochromator control module, a data analysis processing unit and the real-time display unit of a signal.
The motorized precision translation stage control module includes the electric translation estrade control module identical with motorized precision translation stage quantity, each electric translation estrade control module is used for controlling the motion of corresponding motorized precision translation stage, and the motion by motorized precision translation stage is to change the time interval between different femto-second laser pulses.Each electric translation estrade control module includes a parameter module, a SCAN button and a STOP button is set; Parameter arranges module and is used for the position of making zero, current location, reference position (mobile initial position), moving step length and the parameters such as final position (mobile end positions) of motorized precision translation stage are arranged, and can control the translational acceleration of motorized precision translation stage.Scanning is with the SCAN pushbutton enable, by the scan operation of STOP button real-time interrupt.The moving step length of motorized precision translation stage of the present invention can be scaled femtosecond and show under the prerequisite that guarantees precision, convenience is provided for like this experimental implementation of femtosecond laser two-dimensional infrared spectral device.
The monochromator control module is used for input optical slits, grating type and the centre wavelength of monochromator 8 are controlled.
Femtosecond pulse integration control unit receives the signal from data collecting card, the hyperchannel Pulse Spectral Signal that data collecting card is received by infrared array detector 9 according to the requirement of experiment collection, and each channel pulse signal is carried out integration, cumulative being averaged repeatedly, with the raising signal to noise ratio (S/N ratio), and the signal after processing sends to data analysis processing unit and the real-time display unit of signal; Wherein, the data of femtosecond pulse integration control unit reception can be the steady-state light signals when sample and n.s. are arranged, and can be also the excited vibration photon echo signal of sample under the multi-pulse laser effect, i.e. transient state light signal.
The data analysis processing unit is processed the spectral signal that receives, according to requirement of experiment, can will there be two kinds of multichannel light signals of sample and n.s. be divided by and take the logarithm, obtain the one dimension infrared spectrum of stable state, sample can also be carried out the two-dimension fourier transform processing by the transient state light signal under the multi-pulse laser effect, obtain transient state two-dimensional infrared spectrum.
The real-time display unit of signal is used for the spectral signal of femtosecond pulse integration control unit output is shown in real time, the experimenter can be according to the signal to noise ratio (S/N ratio) monitoring test result of signal data, if signal to noise ratio (S/N ratio) is not high, improve at any time and the regulation experiment method in test process, re-start test.The foundation of differentiating the quality of test result can arrange according to concrete requirement of experiment, and the signal to noise ratio (S/N ratio) of the signal data that embodiments of the invention gather is improved and the regulation experiment method less than 10% needs, re-starts test.
In above-described embodiment, the system of control femtosecond laser two-dimensional infrared spectral device of the present invention can adopt the LABVIEW software environment programme and realize, above-mentioned all control modules and module concentrate in a LABVIEW control panel, but can also adopt other software programming to realize.Be not restricted at this.
As shown in Figure 2, further illustrate below by a specific embodiment and adopt control system of the present invention to the concrete control procedure of femtosecond laser two-dimensional infrared spectral device:
1, the infrared array detector 9 with femtosecond laser two-dimensional infrared spectral device connects computing machine by data collecting card;
2, each electric translation estrade control module of motorized precision translation stage control module arranges the parameter of each motorized precision translation stage respectively, determines the step-length that each motorized precision translation stage moves, reference position and final position;
3, the monochromator control module is controlled monochromator 8, the position of slit, grating and centre wavelength that choice experiment needs;
4, open femto-second laser 1, detected by infrared array detector 9 through monochromator through the pulsed optical signals of sample cell 7 outgoing, data collecting card gathers the light signal of infrared array detector 9 each passages.
When 5, beginning to test, judge at first whether " SCAN " button of each motorized precision translation stage control module starts, if be not activated, be only according to the numerical value mobile electric translation stage of setting to the target location, if start, scanning begins;
6, step-length of the every movement of motorized precision translation stage, femtosecond pulse integration control unit carries out integration, cumulative being averaged repeatedly with the pulse signal that receives, and the signal after processing sends to data analysis processing unit and the real-time display unit of signal.
7, judge whether each motorized precision translation stage moves to the scanning final position of setting, if so, end signal collection; If not, judge whether to start " STOP " button, if start " STOP " button, finish test; If not, repeat 6～7 and continue test.
8, the pulsed optical signals of the real-time show sample of the real-time display unit of signal pond 7 outgoing, the experimenter can and should have feature that experimentation is monitored according to signal intensity, guarantees to test correctly to carry out.
9, the data analysis processing unit is processed the spectral signal that receives, can will there be two kinds of multichannel light signals of sample and n.s. be divided by and take the logarithm according to requirement of experiment, can obtain the one dimension infrared spectrum of stable state, also can obtain as required the two-dimensional infrared spectrum of transient state light signal.
The various embodiments described above only are used for explanation the present invention, and wherein each implementation step etc. all can change to some extent, and every equivalents of carrying out on the basis of technical solution of the present invention and improvement all should not got rid of outside protection scope of the present invention.
Claims (5)
1. system that controls femtosecond laser two-dimensional infrared spectral device, it includes a femto-second laser, a light-splitting device, some catoptrons, some to corner reflector, total reflector, focus lamp, sample cell, monochromator and infrared array detector, and every a pair of described corner reflector all is fixedly installed on a motorized precision translation stage; Described femto-second laser emission femtosecond laser is to described light-splitting device, described light-splitting device is divided into femtosecond laser some bundles and it is sent to respectively each described catoptron, light Vertical Launch through each described mirror reflects arrives each to corner reflector, every a pair of described corner reflector reflexes to described focus lamp through described total reflector again after femtosecond laser is reflected, described focus lamp focuses on described sample cell with each light beam, sends to described infrared array detector through the flashlight of described sample cell outgoing through described monochromator; It is characterized in that: it also comprises a computing machine and a data collecting card, the hyperchannel Pulse Spectral Signal that described data collecting card collection is received by described infrared array detector, and send it to described computing machine;
One control system is set in described computing machine, and it comprises a motorized precision translation stage control module, a femtosecond pulse integration control unit, a monochromator control module, a data analysis processing unit and the real-time display unit of a signal; Described motorized precision translation stage control module is controlled each described motorized precision translation stage motion according to the parameter of setting; Described monochromator control module is controlled input optical slits, grating type and the centre wavelength of monochromator; The signal that described femtosecond pulse integration control unit gathers described data collecting card carries out integration, repeatedly cumulatively is averaged rear described data analysis processing unit and the real-time display unit of signal of sending to respectively; Described data analysis processing unit is processed the spectral signal that receives according to requirement of experiment; The real-time display unit of described signal shows in real time to the signal of described femtosecond pulse integration control unit output, and the experimenter is according to the signal to noise ratio (S/N ratio) monitoring test result of signal.
2. a kind of system that controls femtosecond laser two-dimensional infrared spectral device as claimed in claim 1, it is characterized in that: described motorized precision translation stage control module includes the electric translation estrade control module identical with described motorized precision translation stage quantity, and each described electric translation estrade control module is used for controlling corresponding motorized precision translation stage motion; Each described electric translation estrade control module comprises that a parameter arranges module, a SCAN button and a STOP button; Described parameter arranges module and is used for the position of making zero, current location, reference position, moving step length, translational acceleration and the final position of motorized precision translation stage are arranged, and scanning is with the SCAN pushbutton enable, by the scan operation of STOP button real-time interrupt.
3. a kind of system that controls femtosecond laser two-dimensional infrared spectral device as claimed in claim 1 or 2 is characterized in that: the moving step length of described motorized precision translation stage adopts femtosecond to show.
4. a kind of system that controls femtosecond laser two-dimensional infrared spectral device as claimed in claim 1 or 2, it is characterized in that: described infrared array detector is comprised of the multichannel mercury cadmium telluride unit of one dimension.
5. a kind of system that controls femtosecond laser two-dimensional infrared spectral device as claimed in claim 3, it is characterized in that: described infrared array detector is comprised of the multichannel mercury cadmium telluride unit of one dimension.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103335965A (en) * | 2013-06-19 | 2013-10-02 | 上海天美科学仪器有限公司 | Method for measuring high absorbance of spectrophotometer |
| CN106483076A (en) * | 2015-08-27 | 2017-03-08 | 中国科学院物理研究所 | Two-dimension spectrum device |
| CN106769971A (en) * | 2016-12-07 | 2017-05-31 | 中国科学院化学研究所 | A kind of infrared spectroscopy system based on femtosecond pump probe |
| CN106770151A (en) * | 2016-11-01 | 2017-05-31 | 北京华泰诺安技术有限公司 | A kind of method and device of quick detection raman spectral signal |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103335965A (en) * | 2013-06-19 | 2013-10-02 | 上海天美科学仪器有限公司 | Method for measuring high absorbance of spectrophotometer |
| CN103335965B (en) * | 2013-06-19 | 2015-07-08 | 上海天美科学仪器有限公司 | Method for measuring high absorbance of spectrophotometer |
| CN106483076A (en) * | 2015-08-27 | 2017-03-08 | 中国科学院物理研究所 | Two-dimension spectrum device |
| CN106770151A (en) * | 2016-11-01 | 2017-05-31 | 北京华泰诺安技术有限公司 | A kind of method and device of quick detection raman spectral signal |
| CN106770151B (en) * | 2016-11-01 | 2019-10-25 | 北京华泰诺安技术有限公司 | A kind of method and device of quick detection raman spectral signal |
| CN106769971A (en) * | 2016-12-07 | 2017-05-31 | 中国科学院化学研究所 | A kind of infrared spectroscopy system based on femtosecond pump probe |
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Application publication date: 20130508 |