High-energy laser light path environment purification method

Abstract

The invention discloses a macro-energy laser light path environment purification method, which specifically comprises the following steps that three stages of purifiers are arranged in a closed environment of a photoelectric same cabin, and the three stages of purifiers comprise a first-stage high-speed airflow purging module, a second-stage electrostatic adsorption module and a third-stage high-efficiency filtering module; a laser scattering type impurity sensor is arranged in a closed environment of the photoelectric same cabin for real-time monitoring; the method comprises the following steps: firstly, carrying out primary purification, and carrying out replacement purging on a closed environment of the photoelectric same bin by adopting high-purity inert gas; then a third-stage purifier is started for deep purification, and when the real-time impurity concentration monitored by the impurity sensor is lower than a set threshold value, the third-stage purifier is closed. According to the technical scheme, the light path can be efficiently, stably and dynamically regulated and controlled to be purified, deep removal of impurities in the light path is achieved, and stable transmission of high-energy laser is guaranteed.

Description

Technical Field

[0001] This invention belongs to the field of laser technology, specifically relating to a method for purifying the optical path environment of a high-energy laser. Background Technology

[0002] High-energy lasers emit excessively high pulse energy, creating high-intensity photoelectric pressure during laser transmission. This easily attracts dust particles and organic molecules from the air to the optical lenses, especially in environments with both photoelectric and optical components. Over time, this accumulation reduces lens transmittance and can even affect lens coating performance. This leads to reduced emitted laser energy or damage to optical components. The main problems are as follows: 1. Laser-induced plasma contamination: When a strong laser interacts with residual organic molecules or tiny particles, it generates a plasma plume. The ionized fragments may deposit on the surface of optical components, causing damage or a decrease in lens threshold, affecting the transmittance or reflectance of the entire optical component.

[0003] 2. Accumulation of particulate pollutants: Micro- and nano-particles (such as air dust, metal debris, and organic matter) remaining in the optical path are easily activated under strong laser irradiation, forming scattering centers or causing local overheating, thereby affecting the quality of laser transmission.

[0004] 3. Limitations of enclosed environments: Traditional chemical cleaning or mechanical wiping is difficult to implement in enclosed environments, and regular maintenance increases costs.

[0005] 4. High-temperature environment accelerates the volatilization of organic matter. In the photoelectric co-containment environment, the ambient temperature rises very easily in the closed environment, which leads to accelerated volatilization of organic matter. When the volatile substances come into contact with optical surfaces (such as lenses, prisms, mirrors, etc.), they are easily adsorbed, condensed, or chemically reacted to form thin films or deposits, thereby affecting the reflectivity and transmittance of optical components.

[0006] To solve the above problems, the laser needs to be absolutely isolated from the air, or the air needs to be purified to ensure its purity. Current common solutions involve evacuating the laser resonator cavity or filling it with nitrogen, both of which address the problem by achieving absolute isolation between the laser and the air, or by purifying the air. However, the external propagation path of the laser is generally only simply sealed, or left directly exposed to the air. This fails to completely isolate the laser from ordinary air, and the problem of contamination of the external optical path still exists. The main problems with existing technologies are as follows: 1. Existing technologies typically separate the optical cabin and the electrical cabin, and seal the optical cabin. This dual-cabin separation method requires the addition of a sealed penetrating plug, which increases costs.

[0007] 2. Existing technologies typically employ sealed optical engine designs, which are insufficient to completely isolate minute particles. Without purification methods, regular manual lens cleaning and maintenance are required, which is time-consuming and labor-intensive. Furthermore, the lack of real-time monitoring and dynamic adjustment mechanisms makes it difficult to adapt to changes in impurity concentration during laser operation.

[0008] 3. Existing technologies typically achieve optical path purification by purging with inert gases (nitrogen or helium). This gas purging method can only remove large particulate impurities and is less effective at removing particles of micron size and below. Furthermore, it is prone to causing airflow disturbances, which affect the stability of the beam. Summary of the Invention

[0009] This invention addresses the shortcomings of existing technologies by providing a method for purifying the optical path environment of a high-energy laser. This method can efficiently, stably, and dynamically controllably purify the optical path, achieving deep removal of impurities within the optical path and ensuring stable transmission of high-energy lasers.

[0010] This invention achieves this objective through the following technical solution: A method for purifying the optical path environment of a high-energy laser, specifically including the following: A three-stage purifier is installed in the enclosed environment of the photoelectric co-containment chamber. The three-stage purifier includes a first-stage high-speed airflow purging module, a second-stage electrostatic adsorption module, and a third-stage high-efficiency filtration module. A laser scattering impurity sensor is installed in the closed environment of the optoelectronic storage compartment for real-time monitoring; First, a primary purification process is carried out, using high-purity inert gas to replace and purge the enclosed environment of the photoelectric chamber; Then, turn on the third-stage purifier for deep purification. When the real-time impurity concentration monitored by the impurity sensor is lower than the set threshold, turn off the third-stage purifier.

[0011] Furthermore, during the initial purification process, a positive pressure is maintained inside the enclosed environment of the photoelectric chamber. Displacement and purging inert gas enters from one end of the enclosed chamber and exits from the other, creating a unidirectional airflow with a velocity controlled at 2m / s. 3 / s--4m 3 / s.

[0012] Furthermore, the primary purification and purging process involves more than three purging cycles.

[0013] Furthermore, the inert gas used in the primary purification process undergoes a drying pretreatment.

[0014] Furthermore, the second-stage electrostatic adsorption module employs honeycomb-shaped positive and negative plates, applying a kilovolt-level high voltage to create an electrostatic field. Furthermore, the positive and negative electrode plates of the second-stage electrostatic adsorption module are covered with a polytetrafluoroethylene coating.

[0015] Furthermore, the third-stage high-efficiency filtration module uses a nano-ceramic filter.

[0016] Furthermore, the three-stage purifier employs an independent control system, which automatically purifies the air based on real-time data from the impurity sensor when the laser is not in operation.

[0017] Compared with the prior art, the beneficial effects of this invention are as follows: 1. Extremely high purification efficiency: Through three-stage synergistic purification, it achieves gradient removal of impurities of different types and sizes, and can continuously purify the gas in the environment, reduce the content of dust and organic matter in the air, and purify the laser propagation environment.

[0018] 2. Good stability: Using inert gas as the working medium avoids interference from changes in composition in the optical path on laser transmission. At the same time, positive pressure maintenance can prevent the infiltration of external air, which can improve the stability of laser emission, especially the energy stability of high-energy lasers used for a long time.

[0019] 3. Extend the lifespan of various optical components in the optical path: Reduce contamination and ablation of optical components caused by impurities, thereby extending the lifespan of optical components and improving the lifespan of high-energy lasers.

[0020] 4. Simple implementation: It only requires the installation of a professional-grade three-stage purifier and real-time impurity monitoring equipment in a closed environment with photoelectric co-containment chamber. It has a compact structure, wide applicability, is easy to operate, and has high reliability.

[0021] 5. Strong dynamic adaptability: The real-time monitoring and feedback mechanism can automatically adjust the purification parameters according to changes in impurity concentration, making it suitable for various complex working conditions.

[0022] 6. Low light energy loss and stable light output: By purifying the closed environment of the photoelectric chamber, the goal of low light energy loss and stable light output can be achieved.

[0023] In summary, the high-energy laser optical path environment purification method designed in this invention is suitable for clean optical path environments such as high-energy pulsed laser transmission, laser processing, laser testing, and laser communication. This method solves the problem of reduced laser energy caused by the volatilization of organic matter adhering to the outer surfaces of optical components during long-term use of optoelectronic co-containment equipment, resulting in dirt accumulation on lens surfaces during high-energy laser emission. This method features a simple structure, high stability, strong environmental adaptability, and suitability for various application environments. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the purification process of the present invention. Detailed Implementation

[0025] Exemplary embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the invention to those skilled in the art. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] This invention discloses a method for purifying the optical path environment of a high-energy laser, the purification process being as follows: Figure 1 As shown. This invention mainly achieves the purification of the laser beam path by adjusting the purifier and detecting the concentration of environmental impurities. First, the purification system is started to begin primary purification. After primary purification is completed, the impurity sensor system judges the concentration of environmental impurities. If it exceeds a threshold, a professional-grade purifier containing a three-stage purification module is activated for more refined purification. After three-stage purification is completed, the impurity sensor system judges the concentration of environmental impurities. If the detection result is below the threshold, the three-stage purifier is shut down; if the detection result is above the threshold, three-stage purification continues.

[0027] The technical solution of this invention includes four parts: optical path preprocessing, multi-stage purification of the purifier, implementation monitoring and feedback, continuous deep purification, and maintenance, as detailed below: 1. High-purity inert gas, such as nitrogen or helium, is used to purge the enclosed environment of the photoelectric chamber to remove large particulate impurities and air. The purging process is repeated more than three times, maintaining a positive pressure inside the enclosed environment. Each purging cycle involves the inert gas entering from one end of the chamber and exiting from the other, creating a unidirectional airflow with a velocity controlled at 2 m / s². 3 / s--4m 3 / s. At this airflow velocity, the technology effectively carries away large particulate impurities while avoiding the influence of the airflow on subsequent laser transmission. The inert gas used must undergo drying pretreatment to prevent moisture condensation and the formation of new impurities, with a purity >99.99%, to avoid introducing new impurity components.

[0028] 2. A three-stage air purifier is placed in the enclosed environment of the photoelectric chamber. This purifier has a built-in three-stage purification module to achieve gradient removal of impurities of different types and sizes, and can continuously purify the air in the environment. The first stage is a high-speed airflow purging module, which quickly filters the air in the chamber through rapid extraction, achieving the removal of micron-sized particles. The second stage is an electrostatic adsorption module, mainly targeting nano-sized particles. It uses honeycomb positive and negative plates and applies a kilovolt-level high voltage to form an electrostatic field. When particles pass through, they are easily adsorbed onto the positive and negative plates. The surface of the plates is covered with a polytetrafluoroethylene coating to prevent secondary shedding of impurities. The third stage is a high-efficiency filtration module, which uses a nano-ceramic filter to deeply purify even smaller impurities and impurity gases remaining in the gas through adsorption.

[0029] 3. A laser scattering impurity sensor is installed in the enclosed environment of the photoelectric chamber to monitor the concentration of impurities in the environment in real time. An impurity concentration threshold is set; when the monitored impurity value exceeds the threshold, the three-stage purifier activates and begins purifying the gas in the enclosed environment of the photoelectric chamber; when the monitored impurity value falls below the threshold, the three-stage purifier shuts down.

[0030] 4. The three-stage purifier operates independently. When the laser is not in operation, it automatically starts and stops to perform deep purification based on real-time monitoring data from the impurity sensor. This ensures that the impurity monitoring value in the closed environment of the photoelectric chamber is lower than the set impurity concentration threshold before the laser is used again, thus enabling continuous deep purification and maintenance.

[0031] This invention achieves optical path environment purification through the above content. By constructing a multi-level collaborative purification system, combined with active purging, electrostatic adsorption, high-efficiency filtration, and implementation detection and feedback mechanisms, it achieves efficient removal and dynamic monitoring of impurities in the optical path. Using inert gas as the working medium avoids interference from changes in composition in the optical path on laser transmission, while positive pressure maintenance prevents the infiltration of external air.

[0032] This invention only requires the installation of a three-stage purifier and detection equipment in a closed environment of a photoelectric co-chamber or other photoelectric chambers. It has a compact structure and a wide range of applications.

[0033] The present invention has been described in detail above through embodiments, but the content described is only an exemplary embodiment of the present invention and should not be considered as limiting the scope of the present invention. The scope of protection of the present invention is defined by the claims. Any technical solutions designed by those skilled in the art using the technical solutions described in the present invention, or similar technical solutions designed by those skilled in the art under the inspiration of the technical solutions of the present invention, within the substance and scope of protection of the present invention, to achieve the above-mentioned technical effects, or equivalent changes and improvements made to the scope of the application, should still fall within the patent protection scope of the present invention. It should be noted that, for clarity, descriptions of some components and processes that are not directly and obviously related to the scope of protection of the present invention but are known to those skilled in the art have been omitted in the description of the present invention.

Claims

1. A method for purifying the optical path environment of a high-energy laser, characterized in that, Specifically comprising the following contents: A three-stage purifier is arranged in the closed environment of the photoelectric same warehouse, and the three-stage purifier comprises a first-stage high-speed airflow purging module, a second-stage electrostatic adsorption module and a third-stage high-efficiency filtering module; A laser scattering type impurity sensor is arranged in the closed environment of the photoelectric same warehouse for real-time monitoring; First, primary purification is performed, and high-purity inert gas is used to replace and purge the closed environment of the photoelectric same warehouse; Then, the three-stage purifier is started to perform deep purification, and when the real-time impurity concentration monitored by the impurity sensor is lower than the set threshold, the three-stage purifier is stopped.

2. The method according to claim 1, wherein, The primary purification maintains the positive pressure inside the closed environment of the photoelectric cabin, and the inert gas is replaced and purged from one end of the closed cabin to the other end to form a one-way airflow, and the airflow speed is controlled at 2m 3 / s--4m 3 / s.

3. The method of claim 1, wherein the method further comprises: The number of times of primary purification replacement and purging is greater than 3.

4. The method of claim 1, wherein, The inert gas used for primary purification is subjected to drying pretreatment.

5. The method of claim 1, wherein the method further comprises: The second-stage electrostatic adsorption module adopts a honeycomb-shaped positive and negative electrode plate, and a kilovolt high voltage is applied to form an electrostatic field.

6. The method according to claim 5, wherein, The surface layer of the positive and negative electrode plate of the second-stage electrostatic adsorption module is covered with a polytetrafluoroethylene coating.

7. The method of claim 1, wherein the method further comprises: The third-stage high-efficiency filtering module adopts a nanometer ceramic filter screen.

8. The method of claim 1, wherein the method further comprises: The three-stage purifier adopts an independent control system, and in the non-working state of the laser, automatic purification is performed according to the real-time data of the impurity sensor.

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