Demin Zou
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Research Subjects
Research Interests
Demin Zou has a total of 6 co-authors. Here are the top co-authors by number of shared publications:
- Baoqi Zhu
Institute of Laser Engineering, School of Physics and Optoelectronic Engineering, Beijing University of Technology 1 , Beijing 100124
1 shared publication - Bingbing Zhang
Institute of High Energy Physics Chinese Academy of Sciences Beijing China
1 shared publication Jiale Xu
Intelligent Photonic Manufacturing Lab, Beijing University of Technology 1 , Beijing 100124
1 shared publication- Rongshi Xiao
Intelligent Photonic Manufacturing Lab, Beijing University of Technology 1 , Beijing 100124
1 shared publication Rui Xiong
Intelligent Photonic Manufacturing Lab, Beijing University of Technology 1 , Beijing 100124
1 shared publication- Ting Huang
Intelligent Photonic Manufacturing Lab, Beijing University of Technology, Beijing, China
1 shared publication
Latest Publications
- 20 October 2025
- Published by Laser Institute of America in Journal of Laser Applications
- Vol. 37 (4)
Keyhole formation driven by absorption of first-reflected laser light in laser processing based on in situ synchrotron and high-speed imaging
In laser processing under keyhole mode, multiple reflections within the keyhole are known to enhance energy absorption and influence process outcomes. However, whether multiple reflections initiate keyhole formation, and under what conditions, remains unclear. Here, we demonstrate that the absorption of laser light after its first reflection at the material surface within the vapor depression critically drives keyhole formation. An in situ monitoring system, combining synchrotron radiation with high-speed imaging, captures real-time vapor depression dynamics, gas-liquid interface angles, and plume evolution. Detailed analysis reveals that absorption of first-reflected laser light substantially enhances local energy deposition, enabling the transition to a stable keyhole. Experiments with varied laser power-to-spot diameter ratios, supported by simulations, confirm the essential role of first-reflection absorption. This work uncovers a previously overlooked mechanism underlying keyhole initiation.
- 20 October 2025
- Published by Laser Institute of America in Journal of Laser Applications
- Vol. 37 (4)
Keyhole formation driven by absorption of first-reflected laser light in laser processing based on in situ synchrotron and high-speed imaging
In laser processing under keyhole mode, multiple reflections within the keyhole are known to enhance energy absorption and influence process outcomes. However, whether multiple reflections initiate keyhole formation, and under what conditions, remains unclear. Here, we demonstrate that the absorption of laser light after its first reflection at the material surface within the vapor depression critically drives keyhole formation. An in situ monitoring system, combining synchrotron radiation with high-speed imaging, captures real-time vapor depression dynamics, gas-liquid interface angles, and plume evolution. Detailed analysis reveals that absorption of first-reflected laser light substantially enhances local energy deposition, enabling the transition to a stable keyhole. Experiments with varied laser power-to-spot diameter ratios, supported by simulations, confirm the essential role of first-reflection absorption. This work uncovers a previously overlooked mechanism underlying keyhole initiation.