All-quartz multi-component Raman signal online detection module based on multi-laser additive and subtractive manufacturing

Abstract

The invention discloses an all-quartz multi-component Raman signal online detection module based on multi-laser additive and subtractive manufacturing. The all-quartz multi-component Raman signal online detection module comprises a node-free negative curvature hollow-core optical fiber with side micropores, a multimode optical fiber, a single-mode optical fiber plated with a ceramic film, a semicircular micro-channel, a quartz slurry packaging layer and a quartz fixing base, a micro-scale micropore is processed on the side surface of a node-free negative-curvature hollow fiber by utilizing picosecond laser, a multimode fiber, the node-free negative-curvature hollow fiber with the side micropore and a single-mode fiber are welded into a whole, the single-mode fiber is ground into a slice by utilizing an optical fiber grinding technology, and a ceramic membrane is deposited on the end surface of the slice single-mode fiber. Picosecond laser is used for scanning the quartz fixing base layer by layer so as to process a semicircular micro-channel for placing the sensor, and CO2 laser is used for scanning, depositing and curing the quartz slurry packaging layer layer by layer so as to package the sensor. According to the invention, the to-be-detected substance is injected into the all-quartz sensor, so that on-line detection of multi-component Raman signals can be realized in high electromagnetic interference environments such as electric power and the like.

Description

Technical Field

[0001] The invention belongs to the field of multi-laser additive and subtractive material manufacturing and fiber-enhanced Raman spectroscopy, and specifically relates to an all-quartz multi-component Raman signal online detection module based on multi-laser additive and subtractive material manufacturing. Background Art

[0002] Traditional processing methods, including subtractive manufacturing methods such as turning, milling, and grinding, forming manufacturing technologies such as stamping, forging, and extrusion, and connection methods such as brazing and welding, generally face the problem of low material utilization. A large amount of raw materials are discarded during the processing process, which not only increases production costs but also burdens the environment. In addition, they are unable to cope with complex geometric structures, and the processing accuracy is limited, making it difficult to meet the manufacturing requirements of high-precision components.

[0003] Multi-laser additive and subtractive manufacturing technology is an advanced manufacturing technology that combines host computer control, additive manufacturing, and subtractive manufacturing. It uses a multi-laser system to improve manufacturing efficiency, precision, and flexibility. It can flexibly respond to the production needs of complex structures, reduce material waste, and improve production efficiency and customization capabilities.

[0004] Spectroscopic technology has the advantages of non-invasiveness, no sample consumption, high selectivity and in-situ real-time measurement. Among them, Raman spectroscopy has been widely used due to its sensitive detection ability for multi-component substances, fast detection cycle and advantages in water-based sample analysis.

[0005] Fiber-enhanced Raman spectroscopy enhances the intensity of Raman signals by introducing a cumulative effect. At the same time, the application of nodeless negative curvature hollow-core optical fiber effectively reduces the loss during signal transmission and improves the signal-to-noise ratio. Furthermore, single-mode optical fiber coated with ceramic film not only enhances the mechanical strength of the optical fiber, but also further optimizes the signal transmission quality, providing strong support for high-precision and high-sensitivity detection of Raman spectroscopy. However, in practical applications, how to effectively combine fiber-enhanced Raman spectroscopy technology with multi-laser additive and subtractive manufacturing technology, especially to achieve stable and reliable online detection of multi-component Raman signals in high electromagnetic interference environments such as electricity, is still a technical problem that needs to be solved urgently.

[0006] In summary, although multi-laser additive and subtractive manufacturing technology and fiber-enhanced Raman spectroscopy technology each have significant advantages, they still face many challenges in technology integration and practical applications, including but not limited to further improving processing accuracy and efficiency, ensuring signal stability in complex environments, and efficient preparation of customized sensors. Summary of the invention

[0007] In order to achieve the above-mentioned objectives, the present invention proposes an all-quartz multi-component Raman signal online detection module based on multi-laser additive and subtractive manufacturing, which uses picosecond laser subtractive processing to process side microholes and semicircular microchannels and realize the welding of different optical fibers, and uses CO2 laser additive manufacturing to manufacture a quartz fixed base and complete the packaging of the all-quartz sensor, so as to realize the online detection of fiber-enhanced multi-component Raman signals in high electromagnetic interference environments such as electricity.

[0008] The technical solution of the present invention is as follows:

[0009] An all-quartz multi-component Raman signal online detection module based on multi-laser additive and subtractive material manufacturing is characterized by including:

[0010] A nodeless negative curvature hollow core optical fiber with side microholes, wherein the microholes are processed on the side of the nodeless negative curvature hollow core optical fiber by picosecond laser, so as to realize the rapid injection of the substance to be tested, enhance the intensity of the multi-component Raman signal and reduce the transmission loss;

[0011] Multimode fiber;

[0012] The ceramic-coated single-mode optical fiber has a ceramic film coated on the end face, which is used to reflect the multi-component Raman signal into the Raman detector and improve the signal-to-noise ratio of the multi-component Raman signal;

[0013] The all-quartz sensor is formed by sequentially welding the multimode optical fiber, the node-free negative curvature hollow-core optical fiber carrying side microholes, and the single-mode optical fiber coated with a ceramic film through picosecond laser;

[0014] The quartz fixed base is made by CO2 laser additive manufacturing;

[0015] A micron-scale semicircular microchannel is disposed on the quartz fixed base and is manufactured by picosecond laser subtractive processing and is used to fix the all-quartz sensor;

[0016] The quartz slurry packaging layer is formed by coating quartz slurry on the all-quartz sensor, scanning, depositing and curing the quartz slurry packaging layer through CO2 laser, thereby realizing the packaging of the all-quartz sensor.

[0017] Preferably, the side microholes of the nodeless negative curvature hollow-core optical fiber are rectangular and have a size of micrometer level.

[0018] Preferably, several rectangular microholes of the order of 25 x 200 μm are processed by adjusting the output power, focus position and processing speed of the picosecond laser.

[0019] Preferably, the core diameter of the multimode optical fiber is 62.5 μm.

[0020] Preferably, the end face of the single-mode optical fiber is ground into a thin slice by optical fiber grinding technology, and a ceramic film is deposited on the end face of the thin slice.

[0021] Preferably, the thickness of the thin film on the end face of the single-mode optical fiber coated with the ceramic film is less than 10 μm.

[0022] Preferably, the ceramic film is deposited by sputtering coating method, and the ceramic film is made of a high-purity ceramic target material with a purity of more than 99.99%, so as to improve the reflection efficiency and signal-to-noise ratio of multi-component Raman signals.

[0023] Preferably, during the scanning, deposition and curing of the quartz slurry packaging layer layer by layer, the laser power, scanning speed, spot size and other parameters of the CO2 laser are adjusted to ensure that the packaging layer has no cracks inside and a smooth surface.

[0024] Furthermore, the module also includes a Raman detector, and the multimode optical fiber of the all-quartz sensor is connected to the Raman detector for receiving and detecting multi-component Raman signals.

[0025] Furthermore, by injecting the substance to be tested into the all-quartz sensor, online detection of multi-component Raman signals can be achieved in a high electromagnetic interference environment such as electricity.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] 1) Rectangular microholes are precisely processed on the side of the nodeless negative curvature hollow-core optical fiber by picosecond laser. These microholes not only realize the rapid injection of the substance to be tested, but also enhance the intensity of the multi-component Raman signal through the unique optical fiber structure and effectively reduce the signal loss during the transmission process, which significantly improves the sensitivity and accuracy of detection, especially when dealing with trace or low-concentration samples.

[0028] 2) The core diameter of multimode optical fiber is relatively large (62.5μm), which is conducive to the transmission and coupling of optical signals and reduces the attenuation of signals during transmission. At the same time, the end face of single-mode optical fiber coated with ceramic film is ground into thin slices through optical fiber grinding technology, and high-purity ceramic film is deposited on the slices, which not only improves the reflection efficiency of multi-component Raman signals, but also significantly improves the signal-to-noise ratio, making the detection signal clearer and more accurate.

[0029] 3) The all-quartz sensor is made of multimode optical fiber, nodeless negative curvature hollow-core optical fiber with side microholes, and single-mode optical fiber coated with ceramic film, which are precisely welded by picosecond laser, ensuring the stability and reliability of the sensor structure. In addition, the quartz fixed base is made by CO2 laser additive manufacturing, and the setting of micron-level semicircular microchannels further improves the fixing effect and detection accuracy of the sensor. The introduction of the quartz slurry packaging layer ensures that there are no cracks inside the packaging layer and the surface is smooth through layer-by-layer scanning, deposition, and curing of the CO2 laser, thereby effectively protecting the internal structure of the sensor and improving its durability and service life.

[0030] 4) By adjusting the processing parameters of picosecond laser and CO2 laser (such as output power, focus position, processing speed, scanning speed, spot size, etc.), the shape, size and quality of the micropores and the encapsulation layer can be precisely controlled to meet the customized needs in different application scenarios. This high degree of flexibility and customizability enables the module to be widely used in the detection and analysis of multi-component substances in various complex environments.

[0031] 5) The excellent electromagnetic compatibility of the all-quartz structure and the non-invasive, sample-free characteristics of Raman spectroscopy technology enable the present invention to realize online detection of multi-component Raman signals in high electromagnetic interference environments such as electricity, and also has broad application prospects in strong electromagnetic interference environments such as electricity and petrochemicals. It can monitor and analyze multi-component substances in complex systems in real time, and provide strong technical support for industrial production process control, environmental monitoring, food safety and other fields. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A schematic diagram of a node-free negative curvature hollow-core optical fiber provided by the present invention;

[0033] Figure 2 Schematic diagram of processing micron-sized side microholes by picosecond laser in a node-free negative curvature hollow-core fiber provided by the present invention;

[0034] Figure 3 Schematic diagram of the multimode optical fiber, the nodeless negative curvature hollow core optical fiber with side microholes, and the ceramic-coated single-mode optical fiber provided in the present invention before picosecond laser welding;

[0035] Figure 4 Schematic diagram of the multimode optical fiber, the nodeless negative curvature hollow core optical fiber with side microholes, and the ceramic-coated single-mode optical fiber provided in the present invention after picosecond laser welding;

[0036] Figure 5 A schematic diagram of the all-quartz sensor multi-component Raman signal online detection before sample injection provided by the present invention;

[0037] Figure 6This is a schematic diagram of the multi-component Raman signal online detection of the all-quartz sensor provided by the present invention after sample injection;

[0038] Figure 7 This is a schematic diagram of the all-quartz sensor CO2 laser packaging provided by the present invention;

[0039] Figure 8 This is a schematic diagram of the all-quartz sensor CO2 laser packaged according to the present invention;

[0040] Fig. 9 This is the left side view of the CO2 laser package of the full quartz sensor provided by the present invention;

[0041] Fig.10 This is an online detection diagram of multi-component Raman signals of the substance to be tested provided by the present invention;

[0042] Description of reference numerals:

[0043] 1-nodeless negative curvature hollow-core optical fiber cladding tube, 11-nodeless negative curvature hollow-core optical fiber side microhole; 2-nodeless negative curvature hollow-core optical fiber inner tube, 6 in total; 3-picosecond laser, 31-picosecond laser scanning path; 32-picosecond laser welding point; 4-thin single-mode optical fiber, 41-thin single-mode optical fiber core, 42-ceramic film deposited on the surface of thin-film single-mode optical fiber; 5-multimode optical fiber, 51-multimode optical fiber core; 6-multi-component Raman signal online detection sample; 7-sample container to be tested; 8-quartz fixed base, 81-picosecond laser subtractive manufacturing semicircular microchannel, 82-quartz slurry packaging layer, CO2 laser radiation, fixed packaging multi-component Raman signal online detection all-quartz sensor. DETAILED DESCRIPTION

[0044] In order to more clearly illustrate the features and technical contents of the embodiments of the present invention, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0045] This embodiment combines multi-laser additive manufacturing technology with fiber-enhanced Raman spectroscopy technology to provide a highly integrated, miniaturized and highly flexible all-quartz multi-component Raman signal online detection module. This module is particularly suitable for online detection tasks in high electromagnetic interference environments such as power, demonstrating excellent technical innovation and practicality.

[0046] Based on picosecond laser, microholes are processed on the side of nodeless negative curvature hollow-core optical fiber, semicircular microchannels are processed on the quartz fixed base, and various optical fibers are welded. Based on CO2 laser additive manufacturing, the quartz fixed base and the packaging of the all-quartz sensor are packaged. Based on fiber-enhanced Raman spectroscopy and ceramic film-coated reflective surface, the signal-to-noise ratio of multi-component Raman signals is improved. It can be used for online detection of multi-component Raman signals in high electromagnetic interference environments such as power.

[0047] The side microholes of the nodeless negative curvature hollow-core optical fiber enable the material to be filled in a shorter time. The fiber-enhanced Raman spectroscopy technology based on the cumulative effect improves the Raman signal intensity of the signal to be tested, and the nodeless negative curvature hollow-core optical fiber reduces the transmission loss of the multi-component Raman signal of the material to be tested. The single-mode optical fiber coated with a ceramic film is used as a reflection surface, which further improves the signal-to-noise ratio of the Raman signal. Compared with the traditional packaging method, the packaging method based on multi-laser additive and subtractive materials has the characteristics of integration, miniaturization, and high flexibility. Although the traditional packaging method is widely used and the technology is mature, its packaging efficiency is low and the defects of non-micron-level packaging are not suitable for the present invention. The packaging method based on multi-laser additive and subtractive materials is more flexible and reliable. The all-quartz multi-component Raman signal online detection sensor obtained by the coordinated processing and packaging of CO2 laser and picosecond laser enables the detection of multi-component Raman signals to be carried out in high electromagnetic interference environments such as electricity. A full-quartz multi-component Raman signal online detection module manufactured based on multi-laser additive and subtractive materials.

[0048] Based on picosecond laser, micron-sized microholes are processed on the side wall of nodeless negative curvature hollow-core optical fiber to achieve rapid injection of the substance to be tested.

[0049] Based on picosecond laser, multimode optical fiber, node-free negative curvature hollow-core optical fiber with side microholes, and single-mode optical fiber coated with ceramic film are welded into an integral all-quartz sensor.

[0050] The quartz fixed base is additively manufactured based on CO2 laser, and the micron-level semicircular microchannel is subtractively manufactured on the quartz fixed base based on picosecond laser to achieve the fixation of the full quartz sensor.

[0051] The packaging of the full quartz sensor is realized based on CO2 laser scanning of the quartz slurry packaging layer, and finally the online detection of the multi-component Raman signal of the substance to be tested in a high electromagnetic interference environment such as electricity is realized.

[0052] An all-quartz sensor with a cascade structure of multimode optical fiber, node-free negative curvature hollow-core optical fiber with side microholes, and single-mode optical fiber coated with ceramic film.

[0053] The multimode optical fiber with a core diameter of 62.5 μm ensures that the excited multi-component Raman signals can be stably transmitted back to the Raman detector.

[0054] The node-free negative curvature hollow-core fiber enhances the intensity of multi-component Raman signals and achieves low-loss transmission.

[0055] The side microholes of the nodeless negative curvature hollow core fiber allow the substance to be quickly injected.

[0056] The single-mode optical fiber coated with ceramic film allows the multi-component Raman signal to be reflected into the Raman detector as much as possible, and further improves the signal-to-noise ratio of the multi-component Raman signal.

[0057] Figure 1 , Figure 2 This is a schematic diagram of nodeless negative curvature hollow core fiber and side micro-hole processing. Figure 3 , Figure 4 Schematic diagram of the multimode optical fiber, the nodeless negative curvature hollow core optical fiber with side microholes, and the single-mode optical fiber coated with ceramic film before and after welding. Figure 5 , Figure 6 Schematic diagram of the whole quartz sensor before and after injecting the substance to be tested. Figure 7 , Figure 8 , Fig. 9 This is a schematic diagram of the full quartz sensor before and after packaging. Fig.10 Schematic diagram of online detection of multi-component Raman signals of the substance to be tested.

[0058] like Figure 1 As shown in FIG. 1 , it is a schematic diagram of the structure of a nodeless negative curvature hollow core optical fiber. There are six inner tubes 2 inside the cladding tube 1 of the nodeless negative curvature hollow core optical fiber. There are no connection points between the inner tubes and they are evenly distributed. Figure 2 , which is a schematic diagram of micro-hole processing on the side of a nodeless negative curvature hollow-core optical fiber, a picosecond laser 3 processes several rectangular micro-holes 11 of the order of 25 x 200 μm on the side wall of the nodeless negative curvature hollow-core optical fiber along a pre-designed trajectory 31 .

[0059] like Figure 3 , Figure 4 As shown, it is a schematic diagram of welding a multimode optical fiber 5, a nodeless negative curvature hollow core optical fiber 1 with side microholes, and a ceramic-coated single-mode optical fiber 4. The multimode optical fiber 5, the nodeless negative curvature hollow core optical fiber 1 with side microholes, and the ceramic-coated single-mode optical fiber 4 are welded into a whole using a picosecond laser. Figure 4 This is a schematic diagram after welding.

[0060] Among them, after the node-free negative curvature hollow-core optical fiber 1 carrying side microholes is welded to the single-mode optical fiber 4, it is ground to a thickness of 10μm by an optical fiber grinder with grinding pads of different specifications, and a ceramic film is deposited on the end face of the ground single-mode optical fiber based on the sputtering coating method using a high-purity ceramic target.

[0061] Specifically, Figure 5 , Figure 6 As shown, it is a schematic diagram of injecting the substance to be tested into the full quartz sensor, and the full quartz sensor is immersed in the multi-component Raman signal online detection sample 6 contained in the sample container 7 to be tested, so as to achieve the filling of the sample to be tested.

[0062] Specifically, Figure 7 , Figure 8 , Fig. 9As shown, it is a schematic diagram of CO2 laser packaging of an all-quartz sensor. A picosecond laser is used to subtractively manufacture a semicircular microchannel 81 with a diameter of 160 μm on a quartz fixed base 8. The all-quartz sensor is placed in the semicircular microchannel 81, and a quartz slurry packaging layer 82 is coated thereon to realize the packaging of the all-quartz sensor.

[0063] The quartz slurry packaging layer 82 needs to be coated on the full quartz sensor layer by layer, and the quartz slurry packaging layer 82 is scanned layer by layer by a CO2 laser to make it melt by radiation and bond with the full quartz sensor, ensuring that the full quartz sensor is fixed.

[0064] The parameters of the CO2 laser, such as laser power, scanning speed, and spot size, are adjusted to ensure that the quartz slurry packaging layer 82 has no cracks inside and a smooth surface.

[0065] Specifically, Fig.10 As shown, it is a diagram of online detection of multi-component Raman signals of the substance to be tested. The multi-component Raman signals are detected online by connecting the multi-mode optical fiber of the all-quartz sensor to the Raman detector.

[0066] Among them, the node-free negative curvature hollow-core optical fiber is combined with the single-mode optical fiber coated with a ceramic film to achieve online detection of multi-component Raman signals with a high signal-to-noise ratio.

[0067] Among them, the material properties of the sensor made of all quartz enable online detection of multi-component Raman signals such as O2, CH, CH3-CH2, and CH2 in high electromagnetic interference environments such as electricity.

[0068] This embodiment is based on the all-quartz multi-component Raman signal online detection module manufactured by multi-laser additive manufacturing, which realizes high-precision and high-sensitivity online detection of multi-component Raman signals in complex electromagnetic environments, and has significant technical effects and practical application value.

Claims

1. An all-quartz multi-component Raman signal online detection module based on multi-laser additive manufacturing, characterized in that: include: A nodeless negative curvature hollow core optical fiber with side microholes, wherein the microholes are processed on the side of the nodeless negative curvature hollow core optical fiber by picosecond laser, so as to realize the rapid injection of the substance to be tested, enhance the intensity of the multi-component Raman signal and reduce the transmission loss; Multimode fiber; The ceramic-coated single-mode optical fiber has a ceramic film coated on the end face, which is used to reflect the multi-component Raman signal into the Raman detector and improve the signal-to-noise ratio of the multi-component Raman signal; The all-quartz sensor is formed by sequentially welding the multimode optical fiber, the node-free negative curvature hollow-core optical fiber carrying side microholes, and the single-mode optical fiber coated with a ceramic film through picosecond laser; The quartz fixed base is made by CO2 laser additive manufacturing; A micron-scale semicircular microchannel is disposed on the quartz fixed base and is manufactured by picosecond laser subtractive processing and is used to fix the all-quartz sensor; The quartz slurry packaging layer is formed by coating quartz slurry on the all-quartz sensor, scanning, depositing and curing the quartz slurry packaging layer through CO2 laser, thereby realizing the packaging of the all-quartz sensor.

2. The all-quartz multi-component Raman signal online detection module based on multi-laser additive manufacturing according to claim 1 is characterized in that: The side microholes of the nodeless negative curvature hollow core optical fiber are rectangular and have a size of micrometer level.

3. The all-quartz multi-component Raman signal online detection module based on multi-laser additive manufacturing according to claim 2 is characterized in that: By adjusting the output power, focus position and processing speed of the picosecond laser, several rectangular microholes of 25 x 200 μm level can be processed.

4. According to the all-quartz multi-component Raman signal online detection module based on multi-laser additive and subtractive material manufacturing as described in claim 1, the core diameter of the multimode optical fiber is 62.5 μm.

5. The all-quartz multi-component Raman signal online detection module based on multi-laser additive and subtractive material manufacturing according to claim 1 is characterized in that: The end face of the single-mode optical fiber is ground into a thin slice by optical fiber grinding technology, and a ceramic film is deposited on the end face of the thin slice.

6. The all-quartz multi-component Raman signal online detection module based on multi-laser additive manufacturing according to claim 5 is characterized in that: The thickness of the thin film on the end face of the single-mode optical fiber coated with the ceramic film is less than 10 μm.

7. The all-quartz multi-component Raman signal online detection module based on multi-laser additive manufacturing according to claim 5 is characterized in that: The ceramic film is deposited by a sputtering coating method, and the ceramic film is made of a high-purity ceramic target material with a purity of more than 99.99%, and is used to improve the reflection efficiency and signal-to-noise ratio of multi-component Raman signals.

8. The all-quartz multi-component Raman signal online detection module based on multi-laser additive and subtractive material manufacturing according to claim 1 is characterized in that: During the scanning, deposition and curing process of the quartz slurry packaging layer, the laser power, scanning speed, spot size and other parameters of the CO2 laser are adjusted to ensure that there are no cracks inside the packaging layer and the surface is smooth.

9. The all-quartz multi-component Raman signal online detection module based on multi-laser additive and subtractive material manufacturing according to any one of claims 1 to 8, characterized in that: The module also includes a Raman detector, and the multimode optical fiber of the all-quartz sensor is connected to the Raman detector for receiving and detecting multi-component Raman signals.

10. The all-quartz multi-component Raman signal online detection module based on multi-laser additive manufacturing according to any one of claims 1 to 8, characterized in that: By injecting the substance to be tested into the all-quartz sensor, online detection of multi-component Raman signals can be achieved in a high electromagnetic interference environment such as electricity.

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