We are pleased to announce and invite you to one of our weekly online zoom events.
 

Machining of Stainless Steel and Copper with ps-Laser Pulses and 180W of Average Power using DOE and Synchronized Scanning

Machining of stainless steel with ultrashort laser pulses is often a challenging task due to heat accumulation problems leading to bumpy surfaces or due to the formation of cavities or cone-like protrusions (CLP) at high pulse energies. With a specific diffractive optical element (DOE) leading to a special beam shape and synchronized scanning a removal rate of 16 mm3/min was achieved on steel AISI 304 with an average power of 180 W and a repetition rate of 1 MHz. Flat and shiny surfaces without CLP's and bumps having a surface roughness of sa < 500 nm were achieved. In case of copper the maximum removal rate amounted 17 mm3/min with a surface roughness of sa < 400 nm at a repetition rate of 400 kHz and an average power of about 150 W. The experiments clearly show, that with beam forming high average powers can be used for high quality laser micromachining with ultrashort laser pulses and single beams at average powers exceeding 100 W.

Speaker

Prof. Dr. Beat Neuenschwander
Beat Neuenschwander studied physics at the University of Bern and realized his PhD in 1996. Since 2000 he is at the Bern University of Applied Sciences and became full professor in 2005. He is currently leading the laser surface engineering group and heading the institute ALPS. His main research topic is laser micromachining with ultra-short pulses and its industrial application.

Moderator

Dr. Christian Bosshard, Managing director Swissphotonics
Dr. Christian Bosshard received his degree in Physics (1986) and his doctorate (1991, Silver medal award) from ETH. From 2001-2021 he was working at CSEM, first as Section Head and then as Vice President and Head Photonics. Since 2013 he is Managing Director of Swissphotonics. Christian is a Fellow of Optica, Board Member of EPIC, and Member of the Board of the University of Basel.

Date
Tuesday, 8 March 2022

Time
12:00 - 12:45

Software
Zoom

Costs
free of charge

Registration only necessary once
This event series requires registration (see link above). We will send you the access information (Zoom-link and ID) by email after the registration.
The Zoom link remains the same every week. If you have already participated once, you do not need to register again for the following meetings.

Deadline for registration
7 March 2022, 12.00

Contact
Prof. Dr. Beat Neuenschwander
Expert Innosuisse, Professor at the Bern University of Applied Sciences BUAS, leading the lasersurface engineering group and heading the institute ALPS.

Contact Swissphotonics
Dr. Christian Bosshard
Managing director Swissphotonics
+41 79 405 18 26

7. March 2022, Beni Muller + Iris Bollinger