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, […]
Micro-Hole Drilling on Cemented Tungsten Carbide by Ultra Short Laser Pulses
By: Khai Pham Xuan, Kazuya Saginawa, Rie Tanabe, Yoshiro Ito Department of Mechanical Engineering, Nagaoka University of Technology Recently, high precision molds for small products are being highly required in many industrial applications, especially in information communication technology. Mold materials with high hardness, such like cemented tungsten carbide (WC-Co), are difficult to machine by classical […]
Wide Operational Range Pulsed Fiber Laser for Processing Thin Film Photovoltaic Panels
By: Shinobu Tamaoki Sumitomo Electric Inc. Pulse fiber lasers (PFL) have become widely popular for micro-machining applications due to their many benefits, such as the high beam quality, compactness, high wall-plug efficiency, and reliability. MOPA (Master Oscillator Power Amplifier) architectures, which provide temporal pulse shape control, are particularly interesting.
Surface Preparation for Shipbuilding Using a Pulsed High-Power Fibre Laser
By: T. J. Kwee, G. X. Chen, N. R. Lei, K. P. Tan, Y. S. Choo, M. H. Hong Centre of Innovation (Marine & Offshore Technology) Faculty of Engineering, National University of Singapore Ships play a significant role in our life by carrying about 90% of the world’s intercontinental cargo. But the service condition of […]
Scribing of Thin Films with Picosecond Laser Pulses for CIGS Solar Cells
By: P.Gečys, G. Račiukaitis, M.Gedvilas, A. Braun, S. Ragnow Laboratory for Applied Research, Center for Physical Science and Technology, Lithuania Solarion AG, Germany Low material consumption, the possibility of deposition on large areas, use of cheap and flexible substrates make the thin-film photovoltaic elements the most promising technology to achieve a significant cost reduction in […]