International Journal of Extreme Manufacturing

Special Issue on‘GHz Burst Mode Femtosecond Laser Processing – From Fundamentals to Applications’

Guest Editor: Koji Sugioka

Team Leader，Advanced Laser Processing Research Team

RIKEN Center for Advanced Photonics

Homepage：https://www.riken.jp/en/research/labs/rap/adv_laser_process/index.html

Introduction

The GHz burst mode of femtosecond laser pulses can significantly improve ablation efficiency without deteriorating ablation quality, which has overturned common sense and significantly impacted the community of laser materials processing. GHz burst mode processing involves various parameters, such as the number, duration, and energy of intra-pulses in the bursts as well as the time interval of each intra-pulse. GHz burst in MHz burst (BiBurst) further offers a unique scheme for more practical use. The research on GHz burst mode processing is still in its infancy, and the accumulation of a massive amount of data with different parameters and different materials is highly demanded for practical implementation of this process. A theoretical approach based on physics theories is also important; although, the huge parameters present many challenges. Another key factor is the development of a high-performance laser system which can easily, flexibly adjust parameters in the GHz bursts.

The aim of this special issue is to provide a forum for researchers to present and review the state-of-the-art development, challenges, and foresight visions in GHz burst mode femtosecond laser processing with an emphasis on theoretical approach, characterization of processes, and applications, as well as the recent progress in developing new laser systems for GHz burst mode processing.

Possible topics, within this scope, include but are not limited to: