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 Insights
A Study on Laser Cutting of Textiles
By: Dr. Nukman bin Yusoff Laser cutting technology is a non-conventional machining which being used widely in many industries. However, the application of this technology in textile industry is still new and yet to be explored. Indeed, nowadays many textile industries are preferred to cut the textile by using conventional way such as discs, band […]
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.
Comparison of 1 Micron Transmissive Optical Materials for High Power Lasers
By: Steve Rummel, Gary Herrit, Alan Hedges II-VI Infrared One of the problems that high power fiber, direct-diode, and disk laser users experience is thermal lensing of their beam delivery optics and debris windows. This is placing increased demands on the optics used in 1 micron laser beam delivery systems. Direct-diode lasers, meanwhile, continue to […]
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, […]