In-Volume Glass Modification Using a Femtosecond Laser: Comparison Between Repetitive Single-Pulse, MHz Burst, and...

Area of Science:

• Materials Science
• Laser Physics
• Nanotechnology

Background:

• Laser-matter interactions are crucial for materials processing.
• Femtosecond laser pulses offer precise material modification capabilities.
• High-frequency pulse bursts are emerging as advanced processing tools.

Purpose of the Study:

• To investigate in-volume glass modifications induced by GHz bursts of femtosecond pulses.
• To compare the effects of single-pulse, MHz burst, and GHz burst femtosecond laser regimes on glass.
• To establish optimal welding process windows for sodalime and fused silica.

Main Methods:

• Experimental analysis of in-volume glass modifications.
• Comparison of three energy deposition regimes: single-pulse, MHz burst, and GHz burst.
• Systematic variation of parameters: pulse/burst energy, scanning velocity, and pulse count.

Main Results:

• Demonstration of in-volume glass modifications using GHz bursts of femtosecond pulses.
• Characterization of modifications resulting from different pulse regimes and parameters.
• Identification of process windows for welding sodalime and fused silica glasses.

Conclusions:

• GHz bursts of femtosecond pulses represent a novel method for in-volume glass modification.
• The study provides critical insights into laser-induced modifications in glass.
• Established process windows facilitate the application of this technique in glass welding.