English

The team of researcher Wei Chaoyang of Shanghai Optical Machinery Institute has realized the manufacture of fused quartz components with high resistance to UV laser damage

112
2023-09-11 14:40:05
See translation

Recently, a team led by researcher Zhaoyang Wei of the Precision Optics Manufacturing and Testing Center of the Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, has realized the manufacture of fused quartz components with high resistance to UV laser damage based on the defect characterization and removal process of CO2 laser. The research is published in Light: Advanced Manufacturing.

The problem of UV laser induced damage of fused quartz elements seriously restricts the development of high power laser systems. Due to the inevitable processing defects in the current contact polishing process, and it is difficult to be completely removed by post-processing, the service performance and life of fused quartz components are greatly reduced.

The research team proposed a laser chromatography ablation method to characterize subsurface defects based on microsecond pulsed laser low stress uniform ablation technology, and coupled it to the rapid material removal process to achieve complete removal of subsurface defects in the grinding stage. After that, the CO2 laser laser full link flexible machining of fused quartz components is realized by using laser conformal cleaning method to clean the redeposited contaminants on the ablative surface, and using laser melting polishing to smooth the ablative trajectory.

Compared with the traditional process, the CO2 laser processing link can effectively inhibit the introduction of machining defects and realize the preparation of fused quartz components with higher damage threshold. The laser-based defect characterization and removal method proposed in this study provides a new tool for the study of subsurface defects and the formulation of suppression strategies, and also provides a new idea for the low-defect machining of fused quartz components.

This work was supported by the National Key Research and Development Program, Shanghai Sailing Program, National Natural Science Youth Foundation, Shanghai Natural Science Foundation, Astronomy Joint Foundation and Youth Innovation Promotion Association of Chinese Academy of Sciences.

Figure 1 (a) Traditional process link; (b)CO2 laser processing link; (c) Three-dimensional full aperture subsurface defect characterization method

FIG. 2 Comparison of damage properties between conventional and laser-based samples: (a)1-on-1 damage probability (355nm, 8.3ns); (b) Typical damage morphology

Source: Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences

Related Recommendations
  • DataLase launches a new laser active transparent to white coating

    Laser coding and marking technology expert DataLase has launched a series of new colorless to white coatings for a range of packaging applications.These coatings are centered around biodegradable and sustainably sourced raw materials, providing high contrast white printing even on difficult substrates such as 12 micron PET and shrink film, under the weight of flexographic and gravure coatings. Thi...

    2024-03-09
    See translation
  • Low noise! Switzerland develops a new type of laser

    According to foreign media reports, scientists from the Physics Research Institute and the Institute of Physics and the Center for Quantum Science and Engineering at the Swiss Federal Institute of Technology Lausanne (EPFL) in Lausanne, Switzerland have made a new progress in the field of excitation science, developing a smaller and quieter laser system than previous products.Small laser system (I...

    2024-07-03
    See translation
  • Research progress on machine learning for defect detection and prediction in laser cladding process

    It is reported that researchers from Foshan University, the Institute of Chemical Defense of the Academy of Military Sciences, the National Defense Technology Key Laboratory of Equipment Remanufacturing Technology of the Armored Forces Academy, and Chengdu State owned Jinjiang Machinery Factory have summarized and reported the latest progress of machine learning in defect detection and prediction ...

    01-17
    See translation
  • Redefining the Future of Sensing: In depth Study of Novel Plasma Waveguide Structures

    Imagine in such a world, the detection of trace substances is not only fast, but also incredibly accurate, indicating a new era of technological progress in health, safety, and environmental monitoring. Due to pioneering research on plasma waveguide structures, this vision is becoming increasingly realistic, aimed at enhancing refractive index sensing and spectral filtering. This innovative method...

    2024-03-04
    See translation
  • Trumpf 3D printing technology innovation: zero support structure, low waste, unlimited possibilities

    Ditzingen, Germany, September 8, 2023) - TRUMPF, the world's leading provider of machine tools and laser technology solutions, has improved its 3D printing software TruTops Print to print parts with suspension angles as low as 15 degrees with little need for support structures. Trumpf will present its new technology at the European International Machine Tool Show (EMO 2023) in Hannover, Germany.Fi...

    2023-09-13
    See translation