English

New progress in research on laser cleaning and improving the damage threshold of fused quartz components at Shanghai Optics and Machinery Institute

1009
2024-07-08 14:48:44
See translation

Recently, the research team of the High Power Laser Element Technology and Engineering Department of the Shanghai Institute of Optics and Mechanics, Chinese Academy of Sciences, has made new progress in the study of improving the damage threshold of fused quartz elements through laser cleaning. The study proposes for the first time the use of microsecond pulse CO2 laser cleaning to enhance the damage resistance performance of fused quartz components. The relevant research results were published in the International Journal of Mechanical Sciences under the title "Microsecond pulsed CO2 laser cleaning of high damage threshold fused silica".

With the development of modern optical technology, the problem of ultraviolet laser-induced damage to fused quartz components seriously restricts the development of high-power laser systems. At present, the contact polishing process inevitably produces defects and pollution, and it is difficult to completely remove them through post-treatment, greatly reducing the performance and lifespan of fused quartz components.

Principle and experimental schematic diagram of microsecond pulse CO2 laser cleaning
To this end, the research team revealed the modulation mechanism of defects and pollution on component damage performance through a multi-scale simulation method of macro micro nano scale. Through multimodal characterization of the distribution patterns of defects and contamination, it has been confirmed that laser cleaning can effectively eliminate and suppress surface/subsurface defects, absorption defects, chemical structural defects, and elemental contamination, without generating residual thermal stress and severely damaging the surface roughness of materials. The samples cleaned by laser showed a higher damage threshold compared to those processed by traditional processing techniques (mechanical chemical polishing, mechanical chemical polishing+magnetorheological polishing, mechanical chemical polishing+hydrofluoric acid etching). The damage threshold increased by 47.6% with a 0% probability and 27.0% with a 100% probability, respectively. The laser cleaning method proposed in this study provides a new approach for the low defect and clean manufacturing of fused quartz components.

The related work has received support from key research and development programs of the Ministry of Science and Technology, the National Natural Science Foundation of China, and the Shanghai Sailing Plan.

Source: Shanghai Institute of Optics and Mechanics

Related Recommendations
  • EO Technologies from South Korea enters the glass substrate processing market

    Recently, EO Technologies, a well-known semiconductor laser processing equipment manufacturer in South Korea, is emerging in the glass substrate processing market.It is understood that EO Technologies is entering the glass substrate TGV market based on its UV laser drilling equipment originally used in PCB substrate technology. TGV technology is the core process for drilling holes inside glass sub...

    2024-06-18
    See translation
  • Cambridge University researchers use lasers to "heat and strike" 3D printed steel

    According to the University of Cambridge, researchers have developed a new method for 3D printing metal, which can help reduce costs and more effectively utilize resources. This method, developed by a research team led by the University of Cambridge, allows structural modifications to be "programmed" into metal alloys during 3D printing - fine-tuning their performance without the need for thousand...

    2023-11-03
    See translation
  • TriLite has partnered with AMS OSram to develop AR smart glasses displays

    TriLite has announced a technical collaboration with ams OSRAM, a global leader in smart sensors and transmitters. Ams Osram will supply its sub-assembled RGB laser diode to "light up" TriLite's Trixel® 3 laser beam scanner (LBS), the world's smallest AR smart glasses projection display.The award-winning Trixel® 3 LBS offers breakthrough compactness and light weight, as well as a bright an...

    2023-09-06
    See translation
  • The INRS camera captures transient events and is suitable for various scenarios such as high-speed LiDAR systems for autonomous driving

    It is reported that the National Institutes of Sciences (INRS) of Canada has developed a camera platform that can achieve cheaper ultra fast imaging through the use of ready-made components, which can be used in various applications.This new device aims to address some of the limitations of current high-speed imaging, including parallax errors and potential damage from pulse illumination. Th...

    2023-10-07
    See translation
  • Northeastern University of Japan: Breakthrough Laser Technology for Nanoscale Laser Processing

    In the fields of optics and micro/nano processing, precise manipulation of lasers to meet the growing demand for miniaturization is an important challenge in driving the development of modern electronic and biomedical equipment. Recently, researchers from Tohoku University in Japan successfully demonstrated the use of interference technology to enhance the longitudinal electric field of radially p...

    2024-04-12
    See translation