By: O. J. Allegre, W. Perrie, K. Bauchert, G. Dearden, K. G. Watkins Laser Group, School of Engineering, University of Liverpool, UK Boulder Nonlinear Systems, Inc., Colorado The past decade has seen the development of ultra-short pulse lasers, with processes based on femtosecond and picosecond pulse durations becoming increasingly widespread. Thanks to the ultra-short timescale on […]
Laser Microprocessing
Laser Microprocessing Powered by UV Photons
By: Ralph Delmdahl and Rainer Pätzel Coherent GmbH, Germany UV wavelengths are particularly advantageous in laser microprocessing because the high energy photons can remove material by direct bond breaking in most materials, including plastics and glasses. This photoablation process generates virtually no heat and hence only marginal peripheral thermal damage as compared to longer wavelength lasers.
Novel Processes in Laser Micro-fabrication and Micro-joining
By: Kazuyoshi Itoh, YasuyukiOzeki Department of Material and Life Science, Osaka University Focused ultrafast laser pulses can cause a variety of the structural modifications including void, damage, refractive index (RI) change, and crack, depending on materials and irradiation conditions such as pulse energy, pulse width and numerical aperture (NA) of the focusing lens. Among these modifications, […]