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Pulse-on-Demand Operation for Precise High-Speed UV Laser Microstructuring.

Jernej Jan Kočica¹, Jaka Mur¹, Julien Didierjean²

¹Faculty of Mechanical Engineering, University of Ljubljana, Aškerčeva 6, SI-1000 Ljubljana, Slovenia.

|July 8, 2023

Summary

This summary is machine-generated.

This study explores high-speed laser microstructuring using pulse-on-demand technology. Results show that while scanner speed is the main limitation, pulse-on-demand operation enhances processing efficiency for various materials.

Keywords:

UV laser microstructuring nanosecond pulses pulse-on-demand

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Area of Science:

Materials Science
Laser Physics
Manufacturing Engineering

Background:

Laser microstructuring offers contactless processing with high precision.
High average laser powers are limited by scanner inertia.
Optimizing processing speed is crucial for industrial applications.

Purpose of the Study:

To investigate the effects of pulse-on-demand (POD) operation with nanosecond UV lasers.
To analyze the impact of scanning speeds (0-20 m/s) and pulse durations (1-4 ns) on microstructuring.
To determine the feasibility of high-throughput microstructuring using POD technology.

Main Methods:

Utilized a nanosecond UV laser in intrinsic pulse-on-demand mode.
Employed high-speed galvanometric scanners up to 20 m/s.
Varied laser pulse durations and analyzed processing parameters like speed, efficiency, quality, and repeatability.

Main Results:

Confirmed POD suitability for microstructuring from 1 kHz to 1.0 MHz with 5 ns precision.
Identified galvanometric scanners as the bottleneck, even at full utilization.
Observed improved ablation efficiency with longer pulse durations, but with degraded structure quality.

Conclusions:

Pulse-on-demand operation is effective for high-speed laser microstructuring.
Scanner technology limits achievable processing speeds.
A trade-off exists between ablation efficiency and structure quality concerning pulse duration.