CN111750989A - Multi-scale time resolution spectrometer - Google Patents
Multi-scale time resolution spectrometer Download PDFInfo
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- CN111750989A CN111750989A CN202010824668.3A CN202010824668A CN111750989A CN 111750989 A CN111750989 A CN 111750989A CN 202010824668 A CN202010824668 A CN 202010824668A CN 111750989 A CN111750989 A CN 111750989A
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- 230000003287 optical effect Effects 0.000 claims abstract description 61
- 238000001514 detection method Methods 0.000 claims abstract description 42
- 239000000523 sample Substances 0.000 claims description 55
- 238000001228 spectrum Methods 0.000 claims description 6
- 238000002347 injection Methods 0.000 claims description 5
- 239000007924 injection Substances 0.000 claims description 5
- 230000001934 delay Effects 0.000 claims description 3
- 230000001172 regenerating effect Effects 0.000 claims description 3
- 239000000835 fiber Substances 0.000 claims 2
- 238000005086 pumping Methods 0.000 abstract description 18
- 238000000034 method Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 5
- 239000013078 crystal Substances 0.000 description 4
- 239000013307 optical fiber Substances 0.000 description 4
- 229910003327 LiNbO3 Inorganic materials 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229910013321 LiB3O5 Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000000862 absorption spectrum Methods 0.000 description 1
- 230000005281 excited state Effects 0.000 description 1
- 230000005283 ground state Effects 0.000 description 1
- 230000001699 photocatalysis Effects 0.000 description 1
- 238000007146 photocatalysis Methods 0.000 description 1
- 230000029553 photosynthesis Effects 0.000 description 1
- 238000010672 photosynthesis Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 230000001960 triggered effect Effects 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
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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
- G01J3/027—Control of working procedures of a spectrometer; Failure detection; Bandwidth calculation
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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
- G01J3/28—Investigating the spectrum
- G01J3/2889—Rapid scan spectrometers; Time resolved spectrometry
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- 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
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- 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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Abstract
The invention discloses a multi-scale time-resolved spectrometer, which comprises a light source module and a sample chamber, wherein a beam splitter, a modulator, an amplifier and a light generation module are sequentially arranged on a light path from the light source module to the sample chamber, the light generation module comprises a pumping light generation module and a detection light generation module, an optical delay module is arranged on the light path from the modulator to the pumping light generation module or the detection light generation module, and an electronic delay module is arranged between the light source module and the modulator.
Description
Technical Field
The invention relates to a spectrometer, in particular to a multi-scale time resolution spectrometer.
Background
In the fields of physics, chemistry, biology, materials, etc., it is necessary to know the change of the state of an object with time under the condition that the object is excited by the outside, also called pumping, that is, to study the dynamic evolution of the object by a time resolution method, for example, study the dynamic change of physical and chemical parameters of a system such as a molecular structure, carrier energy, phonon temperature, etc., of a solar cell material, a light emitting diode, photocatalysis, two-dimensional materials, photosynthesis, etc., after the system is excited by an optical pumping pulse. In terms of time scale, the time resolution spectrum of several femtoseconds to dozens of nanoseconds can be realized in the same set by an optical delay method, and 1 nanosecond is limited by the optical delay method, so that the delay line needs to move 30 centimeters of optical path, generally, the maximum time can only be delay of dozens of nanoseconds (10 nanoseconds correspond to 3 meters of optical path), the requirement of researching dynamics in a large time scale range cannot be met, the research cost is high if two sets of time resolution systems are used, and the research efficiency and accuracy are also limited.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to provide a multi-scale time resolution spectrometer, which solves the problems that a single optical delay spectrometer cannot meet the requirement of dynamics research in a large time scale range, and two sets of systems are high in cost and low in efficiency and accuracy.
The technical scheme is as follows: the invention relates to a multi-scale time-resolved spectrometer, which comprises a light source module and a sample chamber, wherein a beam splitter, a modulator, an amplifier and a light generation module are sequentially arranged on a light path from the light source module to the sample chamber, the light generation module comprises a pumping light generation module and a detection light generation module, an optical delay module is arranged on the light path from the modulator to the pumping light generation module or the detection light generation module, an electronic delay module is arranged between the light source module and the modulator, the light source module generates laser light and then splits the laser light by the beam splitter, a plurality of beams of light are respectively processed into seed light with different repetition frequencies by the modulator, the seed light with different repetition frequencies are respectively amplified by the amplifier to form a plurality of paths of laser pulses, the plurality of paths of laser pulses respectively output corresponding optical signals by the pumping light generation module and the detection light generation module, and the modulator of the pumping light and the detection light is triggered by the, the seed light injection amplifier at different moments is realized, and the optical delay module is combined to change the optical path difference of the pump light and the detection light reaching the sample, so that the time difference of the pump light and the detection light reaching the sample is controlled.
The device comprises a sample, a detector and a data acquisition module, wherein the detector receives detection light passing through the sample, and the data acquisition module is in signal connection with the detector and acquires at least one of voltage, current, photon counting or photoelectron counting output by the detector under different time delays.
The modulator comprises a pumping light path modulator and a detection light path modulator, and the amplifier comprises a pumping light path amplifier and a detection light path amplifier.
The light source module is a femtosecond laser or a picosecond laser.
The modulator is an acousto-optic modulator or an electro-optic modulator.
The amplifier is an optical fiber amplifier, a regenerative amplifier or a disc laser amplifier.
The beam splitter is at least one of an optical fiber beam splitter and a beam splitter mirror.
The electronic time delay module is a pulse time delay generator circuit.
Has the advantages that: the invention combines optical time delay and electronic time delay, can realize time delay from femtosecond to millisecond multi-time scale, completes multi-scale time resolution spectrum measurement, and obtains a micro-scale to macro-scale time resolution spectrum.
Drawings
FIG. 1 is a schematic structural view of example 1;
FIG. 2 is a schematic structural view of example 2;
FIG. 3 is a schematic structural view of embodiment 3;
FIG. 4 is a schematic structural view of example 4;
FIG. 5 is a schematic structural view of example 5;
FIG. 6 is a schematic structural view of example 6;
FIG. 7 is a schematic structural view of example 7;
FIG. 8 is a schematic structural view of example 8;
FIG. 9 is a schematic structural view of example 9.
Detailed Description
The invention is further illustrated below with reference to examples and figures.
Example 1
As shown in fig. 1, the multi-scale time-resolved spectrometer disclosed in this embodiment includes one path of pump light and one path of probe light, the spectrometer includes a light source module, a beam splitter, a modulator 1, a modulator 2, an amplifier 1, an amplifier 2, a pump light generation module, a probe light generation module, a delay module, a sample chamber, and a data acquisition module, the light source module generates laser with a specified wavelength, and a femtosecond laser system or a picosecond laser system can be adopted, including an oscillator and an amplifier; the beam splitter is arranged behind the light source, splits the laser output by the light source, and splits the laser into two beams, and an optical fiber beam splitter, a beam splitter or other beam splitting optical elements can be adopted; the modulator 1 and the modulator 2 are respectively arranged on two paths of the beam splitting, light at different moments is controlled to be injected into a rear amplifier module, so that different laser repetition frequencies can be realized, and the modulator is an acousto-optic modulator or an electro-optic modulator; the amplifier 1 and the amplifier 2 are respectively arranged behind the modulator 1 and the modulator 2 and are used for amplifying input seed light and realizing high-power laser pulse, and the amplifier can be an optical fiber amplifier, a regenerative amplifier or a disc laser amplifier; the pump light generation module is disposed behind the amplifier 1 and used for optically processing the laser light and outputting the required pump light, which may be light directly output by the amplifier or optically pumped nonlinear crystal such as LiB output by the amplifier3O5,β-BaB2O4,LiNbO3The crystal can be a wavelength tunable laser output by an amplifier pumping an optical parametric amplifier, or a super-link generated by an optical pumping material output by the amplifierContinuous white light or light of other wave bands; the detection light generation module is arranged behind the other path of amplifier module and is used for optically processing laser and outputting a required detection light signal, wherein the detection light signal can be light directly output by the amplifier or an optically pumped nonlinear crystal output by the amplifier, such as LiB3O5,β-BaB2O4,LiNbO3The crystal can be wavelength tunable laser output by an optical parametric amplifier pumped by the amplifier, or can be light of super-continuous white light or other wave bands generated by an optical pumping material output by the amplifier; the delay module comprises an optical delay module and an electronic delay module, the optical delay module can be arranged at any position between the modulator 1 and the sample in the pump light path, and also can be arranged at any position between the modulator 2 and the sample in the probe light path, and the delay is generated and controlled by changing the optical path difference of the pump light and the probe light reaching the sample, generally from dozens of attosecond to dozens of nanosecond. The electronic delay module can trigger the modulator modules of the pumping light and the detection light by an electronic method, realize the injection of the seed light into the amplifier at different moments, realize the control of the time difference of the pumping light and the detection light reaching a sample, and realize the delay control from nanosecond to millisecond, and can be a pulse delay generator circuit. For example, only transient absorption spectrum within tens of nanoseconds needs to be measured, only the synchronization of the fixed electronic delay module needs to be carried out, and the delay is controlled by the optical delay module. If a process with a larger measurement time scale is required, the optical delay module and the electronic delay module are enabled simultaneously. Taking the light source module repetition frequency of 80MHz as an example, the time difference between the two nearest seed lights is 12.5 nanoseconds. By taking the seed light of the pump light as a reference, triggering a modulator module of the probe light through electronic time delay and selecting different seed light injections, the time difference of the minimum interval of 12.5 nanoseconds and the maximum interval of 100 microseconds or 10 milliseconds can be realized. The final time difference is the comprehensive time delay of the optical time delay module and the electronic time delay module, and the time delay generation and control from tens of attosecond to millisecond is realized; the sample chamber is used for placing a sample to be detected, the pump light excites the sample from a ground state to an excited state after passing through the sample, the probe light passes through the sample and then enters the probe lightA detector; the data acquisition module acquires one or more of voltage, current, photon counting, photoelectron counting and spectrum signals output by the spectrometer under different delays through controlling the delay module, and records data.
Example 2
As shown in fig. 2, the multi-scale time-resolved spectrometer disclosed in this embodiment has 2 detection optical modules and 2 optical delay modules, the detection light is composed of a detection light 1 and a detection light 2, the detection light 1 is disposed behind an amplifier 2, the detection light 1 may be a narrow-linewidth laser generation module, and the detection light 2 is disposed behind an amplifier 3 for generating a narrow-pulse laser.
The time delay module comprises an optical time delay module and an electronic time delay module, wherein the optical time delay module comprises 2 optical time delay modules: the 1 st optical delay module 1 is arranged at any position between a modulator and a sample in a pump light optical path, generates and controls delay by changing the optical path difference between pump light and two paths of probe light, and generally can be from dozens of attosecond to dozens of nanosecond; the 2 nd optical delay module 2 is arranged at any position between the modulator and the sample in any path of optical path of the detection light 1 generation module and the detection light 2 generation module, and the optical path difference between the detection light 1 and the detection light 2 reaching the sample is changed to realize the delay between the two, thereby ensuring the process of generating signals on the sample. The electronic time delay module can trigger the modulator modules of the pump light and the two paths of probe light by an electronic method, and seed light at different moments is selected to be injected into the amplifier to realize synchronization. The electronic time delay module can be a pulse time delay generator circuit, and needs to measure the time-resolved absorption/reflection spectrum within dozens of nanoseconds, as long as the electronic time delay module is fixed to be synchronous, the optical time delay module 2 controls the detection light 1 generation module and the detection light 2 module to generate signals, the optical time delay module 1 realizes the time delay of pumping and detection light, and if a process with larger time scale needs to be measured, the optical time delay module and the electronic time delay module are started at the same time. Taking the light source module repetition frequency of 80MHz as an example, the time difference between the two nearest seed lights is 12.5 nanoseconds. By taking the seed light of the pump light as a reference, triggering a modulator module of the probe light through electronic time delay and selecting different seed light injections, the time difference of the minimum interval of 12.5 nanoseconds and the maximum interval of 100 microseconds or 10 milliseconds can be realized. The final time difference is the comprehensive time delay of the optical time delay module and the electronic time delay module, and the time delay generation and control from tens of attosecond to millisecond is realized.
Example 3
As shown in fig. 3, the difference between the multi-scale time-resolved spectrometer disclosed in this embodiment and embodiment 2 is that the 2-path detection light is composed of one path of amplifier module, a detection light 1 module, and a detection light 2 module, which can save one modulator and one amplifier, and the light path is simpler.
Example 4
As shown in fig. 4, this embodiment discloses a multi-scale time-resolved spectrometer with two pump beams and one probe beam, which is different from embodiment 2 in that 2 of 3 amplifiers are followed by a pump beam 1 module and a pump beam 2 module.
Example 5
As shown in fig. 5, the present embodiment discloses a multi-scale time-resolved spectrometer with two pump lights and one probe light, and in a place different from embodiment 4, the 2 pump lights are composed of one amplifier module, a pump light 1 module, and a pump light 2 module, which can save one modulator and one amplifier, and the light path is simpler.
Example 6
As shown in fig. 6, the present embodiment discloses a multi-scale time-resolved spectrometer with two pumping light paths and two detecting light paths, which includes one more amplifier, one more pumping light module, and one more optical delay module, compared with embodiment 2.
The time delay module comprises an optical time delay module and an electronic time delay module, wherein the optical time delay module comprises 3 optical time delay modules: the 1 st optical delay module 1 is arranged at any position between a modulator and a sample in a pump light 1 generation module light path, the 2 nd optical delay module 2 is arranged at any position between the modulator and the sample in a pump light 2 generation module light path, the delay between two paths of pump light is generated and controlled by changing the optical delay 1 and the optical delay 2, the delay between 2 paths of pump light and two paths of detection light is generated and controlled simultaneously, the 3 rd optical delay module 3 is arranged at any position between the modulator and the sample in a detection light 1 generation module light path, the delay between 2 paths of detection light is generated and controlled, the 3 paths of optical delay modules can also be arranged in the pump light path in 1 path, and 2 paths of optical delay modules are arranged in the detection light path to respectively realize the delay between 2 paths of pump light, between 2 paths of detection light and the delay between the pump light and the detection light. The electronic time delay module functions similarly to that in embodiment 2.
Example 7
As shown in fig. 7, the embodiment discloses a multi-scale time-resolved spectrometer of two pump light paths and two probe light paths, compared with embodiment 6, 4 amplifier modules are changed into 3 amplifier modules, and 2 pump light modules are connected behind 1 amplifier module; the optical delay 1 can be placed between the modulator 1 and the amplifier 1 or between the amplifier 1 and the pump light of 2 paths in the pump light path, 1 amplifier module can be saved, and the light path is simpler.
Example 8
As shown in fig. 8, the embodiment discloses a multi-scale time-resolved spectrometer of two pump lights and two probe lights, compared with embodiment 6, 4 amplifier modules are changed into 3 amplifier modules, and 2 probe light modules are connected behind the 3 amplifier modules; the optical delay 2 can be placed between the modulator 3 and the amplifier 3 or between the amplifier 3 and the 2 paths of detection light in the detection light path, 1 amplifier module can be saved, and the light path is simpler.
Example 9
As shown in fig. 9, the multi-scale time-resolved spectrometer of two pump light paths and two probe light paths disclosed in this embodiment, compared with embodiment 6, 4 amplifier modules are changed into 2 amplifier modules, and each amplifier module is connected with 2 pump light or 2 probe light modules, which can save 2 amplifier modules, and the optical path is simpler, and the optical delay 1 can be placed between the modulator and the amplifier or between the amplifier and the 2 pump light or between the 2 probe light paths in the pump light path or the probe light path.
Claims (8)
1. A multi-scale time resolution spectrometer is characterized by comprising a light source module and a sample chamber, wherein a beam splitter, a modulator, an amplifier and a light generation module are sequentially arranged on a light path from the light source module to the sample chamber, the light generation module comprises a pump light generation module and a probe light generation module, an optical delay module is arranged on the light path from the modulator to the pump light generation module or the probe light generation module, an electronic delay module is arranged between the light source module and the modulator, the light source module generates laser light and then splits the laser light by the beam splitter, the light split into a plurality of beams is respectively processed by the modulator into seed light with different repetition frequencies, the seed light with different repetition frequencies is respectively amplified by the amplifier to form a plurality of paths of laser pulses, and the plurality of paths of laser pulses respectively output corresponding optical signals by the pump light generation module and the probe light generation module, the electronic time delay module triggers modulators of the pump light and the probe light to realize the injection of the seed light into the amplifier at different moments, and the optical time delay module is combined to change the optical path difference of the pump light and the probe light reaching a sample to realize the control of the time difference of the pump light and the probe light reaching the sample.
2. The multi-scale time-resolved spectrometer of claim 1, further comprising a detector for receiving the detection light passing through the sample, and a data acquisition module in signal connection with the detector for acquiring at least one of voltage, current, photon count, photoelectron count, and spectrum signal output by the spectrometer at different delays.
3. The multi-scale time-resolved spectrometer of claim 1, wherein the modulator comprises a pump optical path modulator and a probe optical path modulator, and the amplifier comprises a pump optical path amplifier and a probe optical path amplifier.
4. The multi-scale time-resolved spectrometer of claim 1, wherein the light source module is a femtosecond laser or a picosecond laser.
5. The multi-scale time-resolved spectrometer of claim 1, wherein the modulator is an acousto-optic modulator or an electro-optic modulator.
6. The multi-scale time-resolved spectrometer of claim 1, wherein the amplifier is a fiber amplifier, a regenerative amplifier, or a disk laser amplifier.
7. The multi-scale time-resolved spectrometer of claim 1, wherein the beam splitter is at least one of a fiber optic beam splitter and a beam splitter mirror.
8. The multi-scale time-resolved spectrometer of claim 1, wherein the electronic delay module is a pulse delay generator circuit.
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| CN202010824668.3A CN111750989A (en) | 2020-08-17 | 2020-08-17 | Multi-scale time resolution spectrometer |
| PCT/CN2020/109973 WO2022036583A1 (en) | 2020-08-17 | 2020-08-19 | Multi-scale time-resolved spectrometer |
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| CN116148227A (en) * | 2023-04-23 | 2023-05-23 | 广东大湾区空天信息研究院 | Time-resolved spectrum rapid measurement system and method |
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| WO2024134663A1 (en) * | 2022-12-22 | 2024-06-27 | Indian Institute Of Science | System and method for variable repetition rate shot-to-shot rapid scan pump-probe and 2d electronic spectroscopy |
| CN116930092B (en) * | 2023-07-20 | 2024-08-23 | 华东师范大学 | Broadband femtosecond time resolution circular dichroscope |
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| US20130271765A1 (en) * | 2010-10-18 | 2013-10-17 | Centre National De La Recherche Scientifique-Cnrs | Laser emission device and method for the spectroscopic analysis of a sample |
| DE102014111309B3 (en) * | 2014-08-07 | 2016-02-11 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Time-resolved spectrometer and method for time-resolved acquisition of a spectrum of a sample |
| CN108534896A (en) * | 2018-03-07 | 2018-09-14 | 深圳市鹏星光电科技有限公司 | Femtosecond time resolution pumps and the two-in-one spectrometer system of broadband time-resolved CARS |
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| CN203606279U (en) * | 2013-12-09 | 2014-05-21 | 佳木斯大学 | Time-resolved terahertz spectrum detection device |
| US10620050B2 (en) * | 2018-03-05 | 2020-04-14 | Ut-Battelle, Llc | Vibrational sum frequency generation using shaped near infrared light |
| CN108680255B (en) * | 2018-07-09 | 2021-04-16 | 广东工业大学 | Transient absorption spectrometer with ultrahigh time resolution and ultra-long time window |
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- 2020-08-17 CN CN202010824668.3A patent/CN111750989A/en active Pending
- 2020-08-19 WO PCT/CN2020/109973 patent/WO2022036583A1/en active Application Filing
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| US20130271765A1 (en) * | 2010-10-18 | 2013-10-17 | Centre National De La Recherche Scientifique-Cnrs | Laser emission device and method for the spectroscopic analysis of a sample |
| DE102014111309B3 (en) * | 2014-08-07 | 2016-02-11 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Time-resolved spectrometer and method for time-resolved acquisition of a spectrum of a sample |
| CN108534896A (en) * | 2018-03-07 | 2018-09-14 | 深圳市鹏星光电科技有限公司 | Femtosecond time resolution pumps and the two-in-one spectrometer system of broadband time-resolved CARS |
| CN212363426U (en) * | 2020-08-17 | 2021-01-15 | 江苏博创翰林光电高科技有限公司 | Multi-scale time resolution spectrometer |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116148227A (en) * | 2023-04-23 | 2023-05-23 | 广东大湾区空天信息研究院 | Time-resolved spectrum rapid measurement system and method |
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