High speed and high power laser material processing: determination of process limits and exploration of new application fields

Jens Hildenhagen; Paul Bant

doi:10.1117/12.2507367

27 February 2019 High speed and high power laser material processing: determination of process limits and exploration of new application fields

Jens Hildenhagen, Paul Bant

Author Affiliations +

Proceedings Volume 10911, High-Power Laser Materials Processing: Applications, Diagnostics, and Systems VIII; 1091109 (2019) https://doi.org/10.1117/12.2507367
Event: SPIE LASE, 2019, San Francisco, California, United States

Abstract

The increasing output power and brilliance of continuous wave (cw) laser sources allows faster material processes but needs novel handling technologies, e.g. beam guiding systems. Current developments like polygon scanner are dissolving consisting restrictions. Finally, physical properties (e.g. primary thermal conduction and heat capacity) will be the remaining limitations for process speed. A brief study should give an outlook what might be possible in the foreseeable future in the field of high speed laser material processing when the above listed technical limitations have been overcome. Therefore, different samples (bulk material as well as layer systems) were mounted on a fast rotating cylinder and treated with a 30 kW (cw) fiber laser. The high circumferential speed of 120 m/s leds to a short beam-material interaction time for each point on the surface and the immense power can be dispersed. The applied laser spot diameter of ~0.2-0.4 mm results in an interaction time about 2-4 μs and an intensity about 10⁸ W/cm². Such parameters are usually known by pulsed laser systems and would be used to enable distinct surface modifications or even single-pulse ablation. The descript test setup should transfer these applications into continuous processes and eliminate losses otherwise caused by duty cycle. Thus it was possible to remove oxide layer or other resistant coatings with an output of several square meters per minute.

Conference Presentation

Citation Download Citation

Jens Hildenhagen and Paul Bant "High speed and high power laser material processing: determination of process limits and exploration of new application fields", Proc. SPIE 10911, High-Power Laser Materials Processing: Applications, Diagnostics, and Systems VIII, 1091109 (27 February 2019); https://doi.org/10.1117/12.2507367

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available