CN212363426U - Multi-scale time resolution spectrometer - Google Patents
Multi-scale time resolution spectrometer Download PDFInfo
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- CN212363426U CN212363426U CN202021710989.2U CN202021710989U CN212363426U CN 212363426 U CN212363426 U CN 212363426U CN 202021710989 U CN202021710989 U CN 202021710989U CN 212363426 U CN212363426 U CN 212363426U
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Abstract
The utility model 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 pump light generation module and a probe light generation module, an optical time delay module is arranged on a light path from the modulator to the pump light generation module or the probe light generation module, an electronic time delay module is arranged between the light source module and the modulator, the optical time delay and the electronic time delay of the utility model are combined, can realize femto second to the time delay of millisecond multiscale, accomplish multiscale time resolution spectral measurement, obtain from microcosmic to macroscopic time resolution spectrum, the utility model discloses can realize on same set of device, practice thrift the cost, improve data acquisition efficiency and accuracy.
Description
Technical Field
The utility model relates to a spectrum appearance, concretely relates to multiscale time resolution spectrum appearance.
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.
SUMMERY OF THE UTILITY MODEL
Utility model purpose: the utility model aims at providing a multiscale time resolution spectrum appearance solves the unable demand that satisfies the dynamics research of great time scale scope of single optics time delay spectrum appearance, and two sets of systems are with high costs, problem that efficiency and accuracy are low.
The technical scheme is as follows: the utility model discloses a multiscale time-resolved spectroscopy, including light source module and sample room, from light source module to the light path of sample room set gradually the beam splitter, modulator, amplifier and light production module, the light production module includes pump light production module and detection light production module, the light path between modulator and pump light production module or detection light production module is provided with optics time delay module, be provided with electron time delay module between light source module and the modulator, the light source module produces behind the laser through the beam splitter beam splitting, and the light that divides into the multi-beam is respectively handled into the seed light of different repetition frequencies through the modulator, and the seed light of different repetition frequencies is respectively amplified through the amplifier and is formed multichannel laser pulse, and multichannel laser pulse respectively through pump light production module and detection light production module output corresponding light signal, 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.
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 utility model discloses optics time delay and electronics time delay combine, can realize femto second to the time delay of millisecond multiscale, accomplish multiscale time resolution spectral measurement, obtain from the microcosmic spectrum of distinguishing to macroscopic time, the utility model discloses can realize on same set of device from femto second, picosecond, nanosecond, microsecond to the multiscale time resolution spectrum of millisecond, practice thrift the cost, improve data acquisition efficiency and accuracy.
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 present invention will be further explained with reference to the following examples and drawings.
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; pump light generationThe generating module is arranged behind the amplifier 1 and used for optically processing the laser and outputting the required pump light, wherein the pump light can be the light directly output by the amplifier or the 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 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. With seed light of pump light as reference and probe light triggered by electronic delayThe modulator module, selecting different seed light injections, may achieve a time difference of minimum 12.5 ns apart, maximum up to 100 us apart, or 10 ms. 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, and the probe light passes through the sample and then enters the 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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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111750989A (en) * | 2020-08-17 | 2020-10-09 | 江苏博创翰林光电高科技有限公司 | Multi-scale time resolution spectrometer |
| CN113839298A (en) * | 2021-11-25 | 2021-12-24 | 武汉锐科光纤激光技术股份有限公司 | Light beam processor, light beam processing method, storage medium, and electronic apparatus |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111750989A (en) * | 2020-08-17 | 2020-10-09 | 江苏博创翰林光电高科技有限公司 | Multi-scale time resolution spectrometer |
| WO2022036583A1 (en) * | 2020-08-17 | 2022-02-24 | 江苏博创翰林光电高科技有限公司 | Multi-scale time-resolved spectrometer |
| CN113839298A (en) * | 2021-11-25 | 2021-12-24 | 武汉锐科光纤激光技术股份有限公司 | Light beam processor, light beam processing method, storage medium, and electronic apparatus |
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