Combined Pulse Laser: A Reliable Tool for High-Quality, High-Efficiency Material Processing

A special issue of Photonics (ISSN 2304-6732). This special issue belongs to the section "Optical Interaction Science".

Deadline for manuscript submissions: 30 November 2024 | Viewed by 1071

Special Issue Editors


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Guest Editor
State Key Laboratory of Precision Manufacturing for Extreme Service Performance, College of Mechanical and Electrical Engineering, Central South University, Changsha 410083, China
Interests: ultrafast laser micro/nano processing; nanomaterials; laser welding; laser ablation
Special Issues, Collections and Topics in MDPI journals

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Guest Editor
School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, China
Interests: combined pulse laser; laser processing; laser damage; laser welding; laser drilling

E-Mail Website
Guest Editor
State Key Laboratory of Precision Manufacturing for Extreme Service Performance, College of Mechanical and Electrical Engineering, Central South University, Changsha 410083, China
Interests: ultrafast laser micro/nanofabrication; multiscale modeling of ultrafast laser-material interactions; novel micro/nanophotonic materials, structures, and devices
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

With wide applicability and low-cost processing advantages, laser processing, as a mature and versatile tool, is forming an alternative to conventional processing technologies. In recent years, combined pulse laser (CPL), one of the hybrid laser processing technologies, has proven to be a reliable tool for high-quality and high-efficiency processing through the processing advantages of different types of lasers and controlling the laser–matter interaction.

The basic idea of using CPL to process materials is to improve the material removal rate (MRR) by controlling the temporal or spatial profiles of CPL to meet the different laser energy requirements during the laser–matter interaction. Thus, the CPL method has driven the exploration to optimize the laser–matter interactions, and started the race toward these and many other attractive goals. Up to now, the ideas of developing CPL have been explored for improving the efficiency and quality of laser processing in a wealth of applications, such as ablation, drilling, welding, cutting, cleaning, and annealing.

This Special Issue aims at presenting original state-of-the-art research articles dealing with the fundamentals and application of the CPL processing methods. Researchers are invited to submit their contributions to this Special Issue. Topics include, but are not limited to, the following:

  • Theoretical analysis of the CPL–matter interaction;
  • Evolution of CPL-excited plasmas;
  • Multiple types of applications for CPL processing methods;
  • Process study of CPL processing;
  • Temporal and spatial shaping CPL processing methods;
  • Multi-timescale in situ observations of CPL processing.

We look forward to receiving your contributions.

Dr. Xianshi Jia
Prof. Dr. Xiao Zhu
Prof. Dr. Cong Wang
Guest Editors

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Keywords

  • combined pulse laser
  • laser–matter interaction
  • laser processing
  • temporal and spatial shaping
  • laser plasma
  • in situ observations

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Published Papers (1 paper)

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Research

16 pages, 3604 KiB  
Article
High-Strength Welding of Silica Glass Using Double-Pulse Femtosecond Laser under Non-Optical Contact Conditions
by Zheng Gao, Jiahua He, Xianshi Jia, Zhaoxi Yi, Cheng Li, Shifu Zhang, Cong Wang and Ji’an Duan
Photonics 2024, 11(10), 945; https://doi.org/10.3390/photonics11100945 - 8 Oct 2024
Viewed by 770
Abstract
Ultrafast laser welding technology for transparent materials has developed rapidly in recent years; however, high-strength non-optical contact transparent material welding has been a challenge. This work presents a welding method for silica glass using a double-pulse femtosecond (fs) laser and optimizes the laser [...] Read more.
Ultrafast laser welding technology for transparent materials has developed rapidly in recent years; however, high-strength non-optical contact transparent material welding has been a challenge. This work presents a welding method for silica glass using a double-pulse femtosecond (fs) laser and optimizes the laser processing parameters to enhance the welding performance. The welding characteristics of silica glass are analyzed under different time delays by controlling the pulse delay of double pulses. In addition to comprehensively study the influence of various experimental conditions on double-pulse fs laser welding, multi-level tests are designed for five factors, including average laser power, pulse delay, scanning interval, scanning speed, and repetition rate. Finally, by optimizing the parameters, a welding strength of 57.15 MPa is achieved at an average power of 3500 mW, repetition rate of 615 kHz, pulse delay of 66.7 ps, scanning interval of 10 µm, and scanning speed of 1000 µm/s. This work introduces a new approach to glass welding and presents optimal parameters for achieving higher welding strength, which can be widely used in aerospace, microelectronic packaging, microfluidics, and other fields. Full article
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