Laser collaborative system for synchronously acquiring molecular absorption spectrum and atomic emission spectrum in situ

Abstract

The invention provides a molecular absorption spectrum and atomic emission spectrum in-situ synchronous acquisition laser collaborative system, which relates to the technical field of spectral analysis, and comprises a PC terminal, a molecular absorption spectrum acquisition subsystem and an atomic emission spectrum acquisition subsystem, the molecular absorption spectrum acquisition subsystem comprises a signal generator, a first laser module, a first spectrum detector module and an oscilloscope; the atomic emission spectrum acquisition subsystem comprises a signal acquisition control system, a second laser module and a second spectrum detector module; the PC end is used for cooperatively controlling the signal generator and the signal acquisition control system to respectively drive the first laser module and the second laser module to generate laser to irradiate a target sample so as to synchronously obtain a molecular absorption spectrum and an atomic emission spectrum of the same position of the target sample. According to the technical scheme, the problem that the molecular absorption spectrum and the atomic emission spectrum of the target sample cannot be synchronously obtained in situ in the prior art is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of spectrum analysis, and in particular to a laser collaborative system for in-situ synchronous acquisition of molecular absorption spectrum and atomic emission spectrum. Background Art

[0002] Spectroscopic analysis is a method of identifying samples and determining their chemical composition, structure or relative content based on their spectra. From the perspective of functional structure, it is mainly divided into molecular absorption spectroscopy and atomic emission spectroscopy. Molecular spectroscopy is a method of determining sample molecular group information based on information such as relative vibration between atoms within a molecule and molecular rotation. Atomic spectroscopy obtains elemental information in the sample to analyze sample characteristics, and the entire process can achieve non-destructive or minimally destructive testing.

[0003] In the prior art, in order to obtain the molecular absorption spectrum and atomic emission spectrum of a sample, the sample needs to be measured separately, that is, one spectrum is first measured using a spectral detection platform and then the sample is moved to another spectral detection platform to obtain another spectrum. However, some samples have strong time variability, and separate measurements will introduce time disturbance errors, resulting in errors between the final detection results and the actual results. Summary of the invention

[0004] In view of the problems existing in the prior art, the present invention provides a laser collaborative system for in-situ synchronous acquisition of molecular absorption spectrum and atomic emission spectrum.

[0005] In a first aspect, the present invention provides a laser collaborative system for in-situ synchronous acquisition of molecular absorption spectrum and atomic emission spectrum, comprising: PC side, molecular absorption spectrum acquisition subsystem and atomic emission spectrum acquisition subsystem; The molecular absorption spectrum acquisition subsystem includes a signal generator, a first laser module, a first spectrum detector module and an oscilloscope, wherein the signal generator is connected to the PC end, the first laser module is connected to the signal generator, the first spectrum detector module is connected to the oscilloscope, and the oscilloscope is connected to the signal generator and the PC end; The atomic emission spectrum acquisition subsystem includes a signal acquisition control system, a second laser module and a second spectrum detector module, the signal acquisition control system is connected to the PC end, and the second laser module and the second spectrum detector module are both connected to the signal acquisition control system; The first laser module is used to generate laser light to irradiate the target sample under the drive of the signal generator to generate a molecular absorption spectrum signal; the second laser module is used to generate laser light to irradiate the target sample under the drive of the signal acquisition and control system to generate an atomic emission spectrum signal; the PC end is used to coordinately control the signal generator and the signal acquisition and control system to synchronously acquire the molecular absorption spectrum and atomic emission spectrum of the same position of the target sample; The oscilloscope is used to process the molecular absorption spectrum signal collected by the first spectrum detector module under the control of the signal generator to obtain a molecular absorption spectrum diagram of the target sample, and send the molecular absorption spectrum diagram to the PC end; The signal acquisition control system is also used to control the second spectrum detector module to acquire the atomic emission spectrum signal, and send the atomic emission spectrum diagram of the target sample generated by the second spectrum detector module based on the atomic emission spectrum signal to the PC.

[0006] In some embodiments, the first laser module includes a mid-infrared laser, and the mid-infrared laser is connected to the signal generator.

[0007] In some embodiments, the second laser module includes a LIBS laser, and the LIBS laser is connected to the signal acquisition control system.

[0008] In some embodiments, the mid-infrared laser is an external cavity quantum cascade laser.

[0009] In some embodiments, the first spectrum detector module includes an infrared spectrum detector, and the infrared spectrum detector is connected to the oscilloscope.

[0010] In some embodiments, the second spectral detector module includes a visible-near infrared spectral detector, and the visible-near infrared spectral detector is connected to the signal acquisition control system.

[0011] In some embodiments, the first laser module further comprises a first focusing lens for focusing the laser light emitted by the mid-infrared laser onto the surface of the target sample; The first spectrum detector module also includes a molecular absorption spectrum focusing lens for focusing the molecular absorption spectrum signal to the detection sensing area of ​​the infrared spectrum detector.

[0012] In some embodiments, the second laser module further comprises a second focusing lens for focusing the laser light emitted by the LIBS laser onto the surface of the target sample; The second spectrum detector module also includes an atomic emission spectrum focusing lens for focusing the atomic emission spectrum signal to the detection sensing area of ​​the visible-near infrared spectrum detector.

[0013] In some embodiments, the target sample is any one of a solid sample, a gas sample, and a solidified liquid sample.

[0014] In some embodiments, the infrared spectrum detector is a mid-infrared spectrum detector with pre-signal amplification.

[0015] The molecular absorption spectrum and atomic emission spectrum in-situ synchronous acquisition laser collaborative system provided by the present invention is used for in-situ synchronous acquisition of molecular absorption spectrum and atomic emission spectrum. The system includes a PC terminal, a molecular absorption spectrum acquisition subsystem and an atomic emission spectrum acquisition subsystem. The molecular absorption spectrum acquisition subsystem is composed of a signal generator, a first laser module, a first spectrum detector and an oscilloscope; the atomic emission spectrum acquisition subsystem includes a signal acquisition control system, a second laser module and a second spectrum detector. Through the connection relationship between the PC terminal and the signal generator and the signal acquisition control system, the PC terminal collaboratively controls the signal generator and the signal acquisition control system to trigger the first laser module and the second laser module to generate laser focusing to the surface of the target sample, and the first spectrum detector module acquires the molecular absorption spectrum of the target sample, and the second spectrum detector module acquires the atomic emission spectrum of the target sample, and sends the atomic emission spectrum and the molecular absorption spectrum to the PC terminal. Through the collaborative control of the molecular absorption spectrum acquisition subsystem and the atomic emission spectrum acquisition subsystem by the PC terminal, the problem that the molecular absorption spectrum and the atomic emission spectrum of the sample cannot be synchronously acquired in-situ in the prior art is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of the structure of the laser collaborative system for in-situ synchronous acquisition of molecular absorption spectrum and atomic emission spectrum provided by the present invention.

[0018] Figure 2 It is a simplified structural diagram of the laser collaborative system for in-situ synchronous acquisition of molecular absorption spectrum and atomic emission spectrum provided by the present invention. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] Combine the following Figure 1 and Figure 2 Embodiments of the present invention are described.

[0021] Figure 1 This is a schematic diagram of the structure of the laser collaborative system for in-situ synchronous acquisition of molecular absorption spectrum and atomic emission spectrum provided by the present invention. Figure 1 As shown, the collaborative system includes: a PC (Personal Computer) terminal (such as a desktop computer, a laptop computer and other computer devices), a molecular absorption spectrum acquisition subsystem and an atomic emission spectrum acquisition subsystem.

[0022] The molecular absorption spectrum acquisition subsystem includes a signal generator, a first laser module, a first spectrum detector module and an oscilloscope. The signal generator is connected to a PC, the first laser module is connected to the signal generator, the first spectrum detector module is connected to the oscilloscope, and the oscilloscope is connected to the signal generator and the PC.

[0023] The atomic emission spectrum acquisition subsystem includes a signal acquisition control system, a second laser module and a second spectrum detector module. The signal acquisition control system is connected to a PC, and the second laser module and the second spectrum detector module are both connected to the signal acquisition control system.

[0024] The first laser module is used to generate laser to irradiate the target sample under the drive of the signal generator to generate a molecular absorption spectrum signal; the second laser module is used to generate laser to irradiate the target sample under the drive of the signal acquisition and control system to generate an atomic emission spectrum signal; the PC end is used to coordinately control the signal generator and the signal acquisition and control system to synchronously obtain the molecular absorption spectrum and atomic emission spectrum of the same position of the target sample.

[0025] The oscilloscope is used to process the molecular absorption spectrum signal collected by the first spectrum detector module under the control of the signal generator, obtain the molecular absorption spectrum diagram of the target sample, and send the molecular absorption spectrum diagram to the PC end.

[0026] The signal acquisition control system is also used to control the second spectrum detector module to collect atomic emission spectrum signals, and send the atomic emission spectrum diagram of the target sample generated by the second spectrum detector module based on the atomic emission spectrum signals to the PC.

[0027] As an optional embodiment, the PC end is connected to a signal generator, and the signal generator is connected to the first laser module, so that the PC end can control the triggering of the laser in the first laser module through the signal generator. Driven by the signal generator, the first laser module generates laser to irradiate the target sample to generate a molecular absorption spectrum signal.

[0028] In addition, the signal generator is also connected to the oscilloscope. Since the laser excitation speed is very fast, the signal generator is also connected to the oscilloscope so that after the signal generator controls the laser trigger in the first laser module, it controls the oscilloscope to synchronously collect and convert the spectral signal (electrical signal) generated after the laser is irradiated to the target sample into a visual image signal, that is, the molecular absorption spectrum of the target sample is obtained. As an optional embodiment, the oscilloscope is also used to determine the appropriate spectral averaging times according to the display period of the spectrum adjustment and the effect of the spectrum, and transmit the final spectrum information to the PC.

[0029] As an optional embodiment, the first spectrum detector module is used to collect the molecular absorption spectrum signal generated after the laser is irradiated to the target sample. In actual use, the signal generator can control the oscilloscope to obtain the molecular absorption spectrum signal collected by the first spectrum detector module through the acquisition trigger signal. The oscilloscope processes the molecular absorption spectrum signal collected by the first spectrum detector module to obtain the molecular absorption spectrum diagram of the target sample, and sends the molecular absorption spectrum diagram to the PC.

[0030] As an optional embodiment, the PC terminal is also used to set parameters for the signal generator, oscilloscope, and signal acquisition control system, and to display the molecular absorption spectrum and atomic emission spectrum of the target sample. For example, the PC terminal can set the display period, average times and other parameters of the oscilloscope, and the pulse energy, frequency, gate width and other parameters of the signal acquisition control system.

[0031] As an optional embodiment, the operator can also set the parameters (such as frequency, amplitude, etc.) of the laser in the first laser module on the PC side. The signal generator sends instructions to the first laser module according to the parameters set on the PC side, driving the laser to emit laser to the sample according to the preset parameters. After the laser is irradiated on the sample, the sample absorbs photons, and the electron energy levels in the sample molecules transition, generating molecular absorption spectrum signals.

[0032] As an optional embodiment, the PC is connected to the signal acquisition control system, which is also connected to the second laser module and the second spectrum detector module respectively. The operator can set the parameters of the laser in the second laser module (such as laser wavelength, pulse energy, frequency) and the parameters of the detector in the second spectrum detector module (such as sensitivity, gain, etc.) on the PC. Then the acquisition control system sends instructions to the second laser module according to the parameters set on the PC, driving the laser to emit laser to the sample according to the preset parameters. After the laser is irradiated on the sample, it excites the elements in the sample and makes it transition from the ground state to the excited state. Subsequently, these elements release light of a specific wavelength in the process of returning to the ground state and are guided to the second spectrum detector module to generate the corresponding atomic emission spectrum, and the atomic emission spectrum is uploaded to the PC through the signal acquisition control system.

[0033] As an optional embodiment, the signal acquisition control system is also used to control the excitation timing of the laser in the second laser module and the duration of each excitation acting on the sample surface.

[0034] As an optional embodiment, the signal acquisition control system is also used to control the spectrum detector in the second spectrum detector module to collect the plasma spectrum on the sample surface within a period of time after the laser in the second laser module is excited.

[0035] In some embodiments, the first laser module includes a mid-infrared laser connected to the signal generator.

[0036] As an optional embodiment, Figure 2 As shown, it is a simplified structural diagram of the laser collaborative system for in-situ synchronous acquisition of molecular absorption spectrum and atomic emission spectrum provided by the present invention. As can be seen from the figure, the signal generator is directly connected to the mid-infrared laser in the first laser module. Therefore, after receiving the trigger signal generated by the signal generator, the mid-infrared laser will emit a laser of a specific wavelength to irradiate the target sample.

[0037] In some embodiments, the mid-infrared laser is an external cavity quantum cascade laser.

[0038] The external cavity quantum cascade laser (EC-QCL) is a tunable laser that can be rapidly and continuously tuned over hundreds of wave numbers. It has the same laser advantages as LIBS (laser induced breakdown spectroscopy) and the "fingerprint properties" of traditional FTIR (Fourier transform infrared absorption spectrometer) in molecular spectroscopy analysis. It is also miniaturized and can work normally under a portable power supply. Therefore, it is very suitable for the in-situ synchronous acquisition of molecular absorption spectra and atomic emission spectra in the present invention.

[0039] As an optional embodiment, the external cavity quantum cascade laser combines the characteristics of the quantum cascade laser and the external cavity design to achieve wavelength tunability. Since the external cavity quantum cascade laser provides a high-resolution, tunable laser source in the mid-infrared spectrum and has a high sensitivity to specific molecular absorption peaks, it has a good detection effect for various samples. The emission band of the mid-infrared laser can be flexibly selected according to the type of target sample. For example, the emission band of the mid-infrared laser can be 980cm -1 -1200cm -1 , or a wider continuous band of 900cm -1 -1800cm -1 , or other bands with clear fingerprint spectra of substances, which are not limited by the present invention.

[0040] As an optional embodiment, due to the external cavity design of the external cavity quantum cascade laser, the wavelength of the laser can be continuously tuned within a large range, that is, multiple infrared absorption peaks can be covered as required, thereby meeting the detection requirements of various target samples.

[0041] In some embodiments, the first laser module further includes a first focusing lens for focusing the laser light emitted by the mid-infrared laser onto the surface of the target sample.

[0042] As an optional embodiment, the first focusing lens corresponds to Figure 2 Mid-infrared spectrum lens. After the mid-infrared laser is started, the laser emitted by the mid-infrared laser is focused to the surface of the target sample through the infrared spectrum lens. By focusing, the energy of the laser can be concentrated on a specific area of ​​the target sample, which enhances the energy density of the laser beam, improves the intensity and quality of the detection signal, and can more effectively excite the target sample and generate more effective molecular absorption spectrum signals.

[0043] As an optional embodiment, the present invention does not further limit the type of the first focusing lens, and can be flexibly selected according to the emission band of the mid-infrared laser, so that the laser emitted by the mid-infrared laser can be better transmitted, while filtering out stray light, further improving the excitation effect of the mid-infrared laser.

[0044] In some embodiments, the first spectrum detector module includes an infrared spectrum detector, and the infrared spectrum detector is connected to an oscilloscope.

[0045] The first spectrum detector module also includes a molecular absorption spectrum focusing lens for focusing the molecular absorption spectrum signal to the detection sensing area of ​​the infrared spectrum detector.

[0046] The oscilloscope is used to process the molecular absorption spectrum signal collected by the first spectrum detector module under the control of the signal generator, obtain the molecular absorption spectrum diagram of the target sample, and send the molecular absorption spectrum diagram to the PC end.

[0047] As an optional embodiment, after the infrared laser irradiates the target sample to generate a molecular absorption spectrum signal, the molecular absorption spectrum focusing lens focuses the molecular absorption spectrum signal to the detection sensing area of ​​the infrared spectrum detector. The infrared spectrum detector is connected to an oscilloscope. Under the control of the signal generator, the oscilloscope processes the molecular absorption spectrum signal collected by the detector to obtain a molecular absorption spectrum diagram of the target sample, and sends the molecular absorption spectrum diagram to a PC.

[0048] As an optional embodiment, the signal generator controls the wavelength or modulation frequency of the laser by generating a trigger signal to ensure that the light beam emitted by the laser is synchronized with the signal collected by the detector in time. The oscilloscope accurately collects the molecular absorption spectrum signal output by the detector according to the trigger signal of the signal generator to ensure synchronous collection.

[0049] As an optional embodiment, the oscilloscope will collect molecular absorption spectrum signals multiple times. Since molecular absorption spectrum signals usually contain noise, the oscilloscope will collect data multiple times under the control of a trigger signal, average the multiple collected signals, and convert the electrical signal of the infrared detector into a visual spectrum.

[0050] In some embodiments, the infrared spectrum detector is a mid-infrared spectrum detector with pre-signal amplification.

[0051] As an optional embodiment, the molecular absorption spectrum signals of some samples may be very weak. Pre-signal amplification can effectively improve the signal strength and enhance the sensitivity of the detector. In addition, mid-infrared light is easily affected by environmental thermal noise during transmission. Pre-signal amplification occurs inside the detector and immediately amplifies the signal after photoelectric conversion, which can significantly reduce noise interference in the signal during transmission and improve the signal-to-noise ratio.

[0052] In some embodiments, the second laser module includes a LIBS laser, and the LIBS laser is connected to a signal acquisition control system.

[0053] In some embodiments, the second laser module further includes a second focusing lens for focusing the laser light emitted by the LIBS laser onto the surface of the target sample.

[0054] As an optional embodiment, laser induced breakdown spectroscopy is a spectral analysis method that uses a high-energy pulsed laser to excite the sample surface and generate plasma to analyze the sample composition. The LIBS laser is a laser used to generate laser induced breakdown spectroscopy. The present invention does not further limit the specific type of the LIBS laser, and it can be flexibly selected according to the type of target sample. For example, the LIBS laser can be a Nd:YAG laser with an excitation band of 1064nm, and the corresponding second focusing lens is a lens that only transmits light waves with a wavelength of 1064nm.

[0055] As an optional embodiment, Figure 2 As shown in the figure, the laser emitted by the LIBS laser is irradiated to the surface of the target sample after passing through the second focusing lens. The second focusing lens corresponds to Figure 2 Atomic spectroscopy lens in.

[0056] In some embodiments, the second spectrum detector module includes a visible-near infrared spectrum detector, and the visible-near infrared spectrum detector is connected to the signal acquisition control system.

[0057] The second spectrum detector module also includes an atomic emission spectrum focusing lens for focusing the atomic emission spectrum signal to the detection sensing area of ​​the visible-near infrared spectrum detector.

[0058] As an optional embodiment, the LIBS laser in the second laser module irradiates the surface of the target sample, and the atoms in the target sample are excited to generate plasma and emit atomic emission spectrum signals. After being focused by the atomic emission spectrum focusing lens to the visible-near infrared spectrum detector, the atomic emission spectrum of the target sample is obtained.

[0059] In some embodiments, the target sample is any one of a solid sample, a gas sample, and a solidified liquid sample.

[0060] As an optional embodiment, if the target sample is a solid or solidified liquid sample, it can be directly placed on the detection platform. If the target sample is a gas sample, the target sample needs to be injected into the gas detection cavity or the gas flow channel to ensure that the laser can effectively irradiate the gas molecules.

[0061] As an optional embodiment, combined with the above, it can be seen that no matter whether the target sample is a solid, a gas or a solidified liquid, the present invention can achieve efficient detection. At the same time, for the same target sample, the present invention can obtain the molecular absorption spectrum and atomic emission spectrum of the target sample at one time. Compared with the method in the prior art that requires the molecular absorption spectrum and atomic emission spectrum of the target sample to be measured separately, the system provided by the present invention can complete the measurement process more simply and quickly. Furthermore, for target samples with strong time variability, the method of sequential measurement in the prior art is prone to errors, while the present invention can achieve simultaneous in-situ collection, avoiding errors that may be caused by the time variability of the target sample, and further improving the accuracy of the measurement.

[0062] The laser collaborative system for synchronously acquiring molecular absorption spectrum and atomic emission spectrum in situ provided by the present invention, through the connection relationship between the PC end and the signal generator and the signal acquisition control system, the PC end collaboratively controls the signal generator and the signal acquisition control system to trigger the first laser module and the second laser module to generate laser focusing to the surface of the target sample, and the first spectrum detector module acquires the molecular absorption spectrum of the target sample, and the second spectrum detector module acquires the atomic emission spectrum of the target sample, and sends the atomic emission spectrum and the molecular absorption spectrum to the PC end. The collaborative control of the molecular absorption spectrum acquisition subsystem and the atomic emission spectrum acquisition subsystem by the PC end solves the problem that the molecular absorption spectrum and the atomic emission spectrum of the sample cannot be synchronously acquired in situ in the prior art.

[0063] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A laser collaborative system for in-situ synchronous acquisition of molecular absorption spectrum and atomic emission spectrum, characterized in that: include: PC side, molecular absorption spectrum acquisition subsystem and atomic emission spectrum acquisition subsystem; The molecular absorption spectrum acquisition subsystem includes a signal generator, a first laser module, a first spectrum detector module and an oscilloscope, wherein the signal generator is connected to the PC end, the first laser module is connected to the signal generator, the first spectrum detector module is connected to the oscilloscope, and the oscilloscope is connected to the signal generator and the PC end; The atomic emission spectrum acquisition subsystem includes a signal acquisition control system, a second laser module and a second spectrum detector module, the signal acquisition control system is connected to the PC end, and the second laser module and the second spectrum detector module are both connected to the signal acquisition control system; The first laser module is used to generate laser light to irradiate the target sample under the drive of the signal generator to generate a molecular absorption spectrum signal; The second laser module is used to generate laser to irradiate the target sample under the drive of the signal acquisition and control system to generate an atomic emission spectrum signal; the PC end is used to coordinately control the signal generator and the signal acquisition and control system to synchronously obtain the molecular absorption spectrum and atomic emission spectrum of the same position of the target sample; The oscilloscope is used to process the molecular absorption spectrum signal collected by the first spectrum detector module under the control of the signal generator to obtain a molecular absorption spectrum diagram of the target sample, and send the molecular absorption spectrum diagram to the PC end; The signal acquisition control system is also used to control the second spectrum detector module to acquire the atomic emission spectrum signal, and send the atomic emission spectrum diagram of the target sample generated by the second spectrum detector module based on the atomic emission spectrum signal to the PC.

2. The laser collaborative system for in-situ synchronous acquisition of molecular absorption spectrum and atomic emission spectrum according to claim 1, characterized in that: The first laser module includes a mid-infrared laser, and the mid-infrared laser is connected to the signal generator.

3. The laser collaborative system for in-situ synchronous acquisition of molecular absorption spectrum and atomic emission spectrum according to claim 1 or 2, characterized in that: The second laser module includes a LIBS laser, and the LIBS laser is connected to the signal acquisition control system.

4. The laser collaborative system for in-situ synchronous acquisition of molecular absorption spectrum and atomic emission spectrum according to claim 2, characterized in that: The mid-infrared laser is an external cavity quantum cascade laser.

5. The laser collaborative system for in-situ synchronous acquisition of molecular absorption spectrum and atomic emission spectrum according to claim 2, characterized in that: The first spectrum detector module includes an infrared spectrum detector, and the infrared spectrum detector is connected to the oscilloscope.

6. The laser collaborative system for in-situ synchronous acquisition of molecular absorption spectrum and atomic emission spectrum according to claim 3, characterized in that: The second spectrum detector module includes a visible-near infrared spectrum detector, and the visible-near infrared spectrum detector is connected to the signal acquisition control system.

7. The laser collaborative system for in-situ synchronous acquisition of molecular absorption spectrum and atomic emission spectrum according to claim 5, characterized in that: The first laser module further includes a first focusing lens for focusing the laser light emitted by the mid-infrared laser onto the surface of the target sample; The first spectrum detector module also includes a molecular absorption spectrum focusing lens for focusing the molecular absorption spectrum signal to the detection sensing area of ​​the infrared spectrum detector.

8. The laser collaborative system for in-situ synchronous acquisition of molecular absorption spectrum and atomic emission spectrum according to claim 6, characterized in that: The second laser module further includes a second focusing lens for focusing the laser light emitted by the LIBS laser onto the surface of the target sample; The second spectrum detector module also includes an atomic emission spectrum focusing lens for focusing the atomic emission spectrum signal to the detection sensing area of ​​the visible-near infrared spectrum detector.

9. The laser collaborative system for in-situ synchronous acquisition of molecular absorption spectrum and atomic emission spectrum according to claim 1, characterized in that: The target sample is any one of a solid sample, a gas sample, and a solidified liquid sample.

10. The laser collaborative system for in-situ synchronous acquisition of molecular absorption spectrum and atomic emission spectrum according to claim 5, characterized in that: The infrared spectrum detector is a mid-infrared spectrum detector with pre-signal amplification.

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