CN111750990A - Time resolution spectrometer based on electronics synchronization - Google Patents
Time resolution spectrometer based on electronics synchronization Download PDFInfo
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- CN111750990A CN111750990A CN202010824680.4A CN202010824680A CN111750990A CN 111750990 A CN111750990 A CN 111750990A CN 202010824680 A CN202010824680 A CN 202010824680A CN 111750990 A CN111750990 A CN 111750990A
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- 238000001514 detection method Methods 0.000 claims abstract description 16
- 238000001914 filtration Methods 0.000 claims abstract description 11
- 230000001360 synchronised effect Effects 0.000 claims abstract description 7
- 230000001934 delay Effects 0.000 claims abstract description 4
- 239000000835 fiber Substances 0.000 claims description 5
- 238000001228 spectrum Methods 0.000 abstract description 6
- 238000005086 pumping Methods 0.000 abstract description 4
- 238000005259 measurement Methods 0.000 abstract description 2
- 239000000523 sample Substances 0.000 description 27
- 238000000034 method Methods 0.000 description 9
- 230000003287 optical effect Effects 0.000 description 5
- 239000013078 crystal Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000013307 optical fiber Substances 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000004611 spectroscopical analysis Methods 0.000 description 2
- 229910003327 LiNbO3 Inorganic materials 0.000 description 1
- 238000001069 Raman spectroscopy Methods 0.000 description 1
- 238000001237 Raman spectrum Methods 0.000 description 1
- 238000000862 absorption spectrum Methods 0.000 description 1
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 1
- 229910001634 calcium fluoride Inorganic materials 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005281 excited state Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000005283 ground state Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000001699 photocatalysis Effects 0.000 description 1
- 239000004038 photonic crystal Substances 0.000 description 1
- 229910052594 sapphire Inorganic materials 0.000 description 1
- 239000010980 sapphire Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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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
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/02—Details
- G01J3/0205—Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows
-
- 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
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/02—Details
- G01J3/027—Control of working procedures of a spectrometer; Failure detection; Bandwidth calculation
-
- 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
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/28—Investigating the spectrum
- G01J3/2889—Rapid scan spectrometers; Time resolved spectrometry
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/27—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands using photo-electric detection ; circuits for computing concentration
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- Spectroscopy & Molecular Physics (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Mathematical Physics (AREA)
- Theoretical Computer Science (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
- Spectrometry And Color Measurement (AREA)
Abstract
The invention discloses a time-resolved spectrometer based on electronics synchronization, which is characterized in that a light source module, a beam combiner, a sample chamber, a filtering module, a signal detection module and a data acquisition device are sequentially arranged along a light path, wherein the light source module comprises a plurality of light sources and drivers, the electronic delay module generates electric pulse signals with different time sequences to trigger the drivers and control the time sequences of the drivers to work, the drivers drive the light sources to emit light, multiple paths of light with different time delays output by the light sources enter the sample chamber after being spatially overlapped through the beam combiner, the light reaching the sample first excites the sample, the arriving light passes through the sample, the detection module measures the intensity of transmitted light after the unnecessary light is filtered out through the filtering module, and the data acquisition device acquires and records the intensity of the transmitted light obtained through measurement. The invention can be synchronized by electronics, has simple structure and portability, greatly improves the stability, and can easily obtain pumping and detecting time-resolved spectra with different wavelengths by integrating more light sources with different wavelengths.
Description
Technical Field
The invention relates to a spectrometer, in particular to a time-resolved spectrometer based on electronics synchronization.
Background
The physical and chemical properties of the material change with time after the material is excited by light, and the process is called a kinetic process. For example, after a solar cell, a photocatalytic material, a photosensitive molecule, or the like is excited by light, carriers or molecules, or the like in an excited state relax to a ground state through a radiation or non-radiation process with time. One technique for studying these kinetic processes is the time-resolved spectroscopy technique. Time-resolved spectroscopy ranges from ultrafast femtosecond and picosecond time, to nanosecond and microsecond time, to comparatively macroscopic time scales such as millisecond and second time, and the like, in terms of time domain. The conventional time resolution spectrum method from resolution to picosecond generally needs a picosecond or femtosecond laser source and a wavelength tunable laser pulse, changes time delay through an optical time delay method, and has the advantages of large system, poor stability, high cost and difficult maintenance.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to provide a time resolution spectrometer based on electronics synchronization, and solves the problems of complex structure and poor stability of the existing picosecond time resolution spectrometer.
The technical scheme is as follows: the time resolution spectrometer based on electronics synchronization is provided with a light source module, a beam combiner, a sample chamber, a light filtering module, a signal detection module and a data acquisition device in sequence along a light path, the light source module comprises a plurality of light sources and a driver, the driver is electrically connected with the light sources, the driver is electrically connected with the electronic time delay module, the signal detection module is electrically connected with the data acquisition device, the electronic time delay module generates electric pulse signals with different time sequences to trigger each driver to work according to the time sequences, each driver drives each light source to emit light, multiple paths of light with different time delays output by each light source enter the sample chamber after being spatially overlapped through the beam combiner, the light reaching the sample firstly excites the sample, the light reaching the sample later passes through the sample, the detection module measures the intensity of transmitted light after the light not needed is filtered out through the light filtering module, and the data acquisition device records the intensity of the transmitted light.
The light source module is a free space coupled laser diode, an optical fiber coupled laser diode or a light emitting diode.
The beam combiner is at least one of a combination of a reflecting mirror and a beam combining mirror, an optical fiber coupling beam combiner, a wave plate and a polarization beam splitter.
The filtering module is at least one of a filter, a grating and slit combination, a fiber Bragg grating, a volume Bragg grating and a monochromator.
The signal detection module is any one of a photodiode, an avalanche photodiode, a photomultiplier tube, a CCD and a CMOS.
The data acquisition device is a PC.
The data acquisition device is electrically connected with the electronic delay module and drives the electronic delay module to work.
Has the advantages that: the invention can be synchronized by electronics, has simple and portable structure and greatly improved stability, can easily obtain time-resolved spectra of pumping and detection with different wavelengths by integrating more light sources with different wavelengths, has simple and stable structure, and realizes time-resolved spectrum measurement with large-scale time scale from picosecond, nanosecond, microsecond, millisecond to second.
Drawings
The invention has a structure schematic diagram.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in figure 1, the time-resolved spectrometer based on electronics synchronization of the invention is sequentially provided with a light source module, a beam combiner, a sample chamber, a filtering module, a signal detection module and a data acquisition device along a light path, wherein the light source module comprises a plurality of light sources and drivers, the drivers are electrically connected with the light sources, the drivers are electrically connected with an electronic delay module, the electronic delay module generates electric pulse signals with different time sequences to trigger the drivers and control the working time sequence of the drivers, the drivers drive the light sources to emit light, delayed multipath light output by the light sources enters the sample chamber after being spatially overlapped through the beam combiner, the light which reaches the sample first excites the sample, and the light which reaches the sample later passes through the beam combiner to excite the sample chamberAfter the sample is filtered and the unnecessary light is filtered by the light filtering module, the detection module measures the intensity of the transmitted light, and the data acquisition device records the intensity of the transmitted light and the time delay. The light source module is a free space coupled laser diode, an optical fiber coupled laser diode and a light emitting diode, the laser diode is used as a light source for amplifying the seed light through a laser amplifier, the laser diode is used as the seed light and is amplified through the laser amplifier, then the optical parametric amplifier is pumped, laser with tunable wavelength is generated, the laser diode is used as the seed light and is amplified through the laser amplifier, and then a nonlinear crystal, such as LiB, is pumped3O5,β-BaB2O4,LiNbO3The crystal is used for generating harmonic laser, a laser diode is used as seed light and is amplified by a laser amplifier, and then pumping materials generate super-continuous white light or light with other wave bands, such as any one of sapphire crystal, calcium fluoride crystal, water, photonic crystal and gas; the driver drives the light source module to emit light, and can generate different currents and different pulse widths so that the light source module generates light pulses with different pulse widths and different intensities. The light source module can also have the function of regulating and controlling the temperature of the light source module, the wavelength emitted by the light source module can be regulated within a certain range, and the starting time of the pulse output by the driver is controlled by the rising edge or the falling edge of the pulse of the electronic delay module; the pulse width output by the driver can be controlled by a self module or determined by the pulse width of an electronic delay module; the electronic delay module can generate electric pulse signals with different time sequences to one or more drivers, is used for triggering different drivers and controlling the working time sequence of each driver, outputs the pulse at the moment when the rising edge or the falling edge of the pulse triggers the driver module to output the pulse, and can also determine the output moment and the output pulse width of the driver module at the same time by the pulse width of the pulse output by the electronic delay module; the beam combiner is used for processing the spatial coincidence of the multipath light output by the light source module on the sample and is a combination of a reflecting mirror and a beam combining mirror, an optical fiber coupling beam combiner, a wave plate and a polarization beam splitterOne or more of; the sample chamber is used for placing a sample to be detected, and one or more beams of light generated by the light source module pass through the sample to excite the sample and the sample to absorb and reflect the light; the filtering module is used for filtering out non-signal light to improve the signal-to-noise ratio and is one or more of an optical filter, a grating and slit combination, a fiber Bragg grating, a volume Bragg grating and a monochromator; the signal detection module is a module for detecting signals and is any one of a photodiode, an avalanche photodiode, a photomultiplier, a CCD and a CMOS; the data acquisition device records time delay and signals, can also control what time sequence is output by the electronic time delay module and which driver module is driven, realizes that one or more light source modules output one or more specific wavelengths, and records the signal size of the wavelength, and is a PC.
When the light source device works, the data acquisition device controls the electronic time delay module to generate 2 pulses with certain time delay, and the 2 pulses respectively trigger certain 2 driver modules to enable certain 2 light sources to generate 2 beams of light with certain pulse width and certain time delay. One of the beams is used as pump light to excite the sample, and the other beam is used as probe light. The signal detection module measures the intensity of the transmitted light of the detection light after passing through the sample under the time delay, the data acquisition device records the intensity of the transmitted light under the time delay, the time delay of 2 beams of light is continuously changed through the electronic time delay module, and finally the intensity of the transmitted light under different time delays is obtained, namely a group of time-resolved absorption spectra. The intensity of reflected light or scattered light of the probe light on the sample may be measured to obtain a time-resolved spectrum. The data acquisition device may not control the electronic delay module, but only record the delay, and the delay module may change the delay in other ways, such as manually changing the delay between the optical pulses of the electronic delay module, and may generate more than 2 optical pulses with a certain time sequence in some time-resolved spectra. For example, a time-resolved stimulated raman spectrum is obtained by changing the delay between pump light and probe light, wherein one beam of light is used for pumping a sample, and the other two beams of light are used for generating a stimulated raman process as probe light.
Claims (7)
1. A time-resolved spectrometer based on electronics synchronization is characterized in that a light source module, a beam combiner, a sample chamber, a light filtering module, a signal detection module and a data acquisition device are sequentially arranged along a light path, the light source module comprises a plurality of light sources and a driver, the driver is electrically connected with the light sources, the driver is electrically connected with the electronic time delay module, the signal detection module is electrically connected with the data acquisition device, the electronic time delay module generates electric pulse signals with different time sequences to trigger each driver to work according to the time sequences, each driver drives each light source to emit light, multiple paths of light with different time delays output by each light source enter the sample chamber after being spatially overlapped through the beam combiner, the light reaching the sample firstly excites the sample, the light reaching the sample later passes through the sample, the detection module measures the intensity of transmitted light after the light not needed is filtered out through the light filtering module, and the data acquisition device records the intensity of the transmitted light.
2. The electronically synchronous based time resolved spectrometer of claim 1, wherein the light source module is a free space coupled laser diode, a fiber coupled laser diode, or a light emitting diode.
3. The electronically synchronous based time resolved spectrometer of claim 1, wherein the beam combiner is at least one of a mirror and beam combiner combination, a fiber coupled beam combiner, a wave plate and a polarizing beam splitter combination.
4. The electronically synchronous based time resolved spectrometer of claim 1, wherein the filter module is at least one of a filter, a grating and slit combination, a fiber bragg grating, a volume bragg grating, and a monochromator.
5. The electronically synchronous based time resolved spectrometer of claim 1, wherein the signal detection module is any one of a photodiode, an avalanche photodiode, a photomultiplier tube, a CCD and a CMOS.
6. The electronically synchronous based time resolved spectrometer of claim 1, wherein the data acquisition device is a PC.
7. The electronic synchronization-based time-resolved spectrometer of claim 1, wherein the data acquisition device is electrically connected to the electronic delay module to drive the electronic delay module to operate.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010824680.4A CN111750990A (en) | 2020-08-17 | 2020-08-17 | Time resolution spectrometer based on electronics synchronization |
| PCT/CN2020/109972 WO2022036582A1 (en) | 2020-08-17 | 2020-08-19 | Time-resolved spectrometer realizing synchronization on basis of electronics |
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| CN202010824680.4A CN111750990A (en) | 2020-08-17 | 2020-08-17 | Time resolution spectrometer based on electronics synchronization |
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| CN111750990A true CN111750990A (en) | 2020-10-09 |
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| CN116706664A (en) * | 2023-08-02 | 2023-09-05 | 深圳市中科融光医疗科技有限公司 | High-energy space-time coupled laser device and application method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101271025A (en) * | 2007-03-20 | 2008-09-24 | 北京大学 | Method and device for ultrafast time discrimination measurement of seed photo-signal |
| CN104422519A (en) * | 2013-09-02 | 2015-03-18 | 中国科学院大连化学物理研究所 | Modularized femtosecond time-resolved transient absorption and fluorescence depletion two-in-one spectrometer |
| US20200033259A1 (en) * | 2017-03-21 | 2020-01-30 | Max-Planck-Gesellschaft Zur Foerderung Der Wissenschaften E.V. | Methods and devices for measuring changes in the polarization response of a sample by field-resolved vibrational spectroscopy |
| CN212363425U (en) * | 2020-08-17 | 2021-01-15 | 江苏博创翰林光电高科技有限公司 | Time resolution spectrometer based on electronics synchronization |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5633711A (en) * | 1991-07-08 | 1997-05-27 | Massachusettes Institute Of Technology | Measurement of material properties with optically induced phonons |
| JP4839481B2 (en) * | 2006-11-29 | 2011-12-21 | 独立行政法人科学技術振興機構 | Pump probe measuring apparatus and scanning probe microscope apparatus using the same |
| JP5610399B2 (en) * | 2011-08-02 | 2014-10-22 | 独立行政法人科学技術振興機構 | Pump probe measuring device |
| WO2014019091A1 (en) * | 2012-08-01 | 2014-02-06 | Institut National De La Recherche Scientifique, | Spectral-domain interferometric method and system for characterizing terahertz radiation |
| JP6096725B2 (en) * | 2014-09-09 | 2017-03-15 | アイシン精機株式会社 | Film thickness measuring apparatus and film thickness measuring method |
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- 2020-08-17 CN CN202010824680.4A patent/CN111750990A/en active Pending
- 2020-08-19 WO PCT/CN2020/109972 patent/WO2022036582A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101271025A (en) * | 2007-03-20 | 2008-09-24 | 北京大学 | Method and device for ultrafast time discrimination measurement of seed photo-signal |
| CN104422519A (en) * | 2013-09-02 | 2015-03-18 | 中国科学院大连化学物理研究所 | Modularized femtosecond time-resolved transient absorption and fluorescence depletion two-in-one spectrometer |
| US20200033259A1 (en) * | 2017-03-21 | 2020-01-30 | Max-Planck-Gesellschaft Zur Foerderung Der Wissenschaften E.V. | Methods and devices for measuring changes in the polarization response of a sample by field-resolved vibrational spectroscopy |
| CN212363425U (en) * | 2020-08-17 | 2021-01-15 | 江苏博创翰林光电高科技有限公司 | Time resolution spectrometer based on electronics synchronization |
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