Results 211 to 220 of about 8,387 (250)

Biological processes studied by ultrafast laser techniques

1988
In writing this review of fast kinetic and spectroscopic studies in biology we have attempted to put the new pulsed laser results into a broad biological context. In this way it is hoped that those not so familiar with the biology will be familiarized with at least a few of the basic questions that modern laser technology might address.
Robin M. Hochstrasser, Carey K. Johnson
openaire   +1 more source

Ultrafast laser trepanning process and modeling

ICALEO 2016: 35th International Congress on Applications of Lasers & Electro-Optics, 2016
We present an engineering model of ultrafast laser ablation with normal or non-normal (oblique) laser beams. It can be applied to trepanning drilling but also to zero-taper cutting. Specific experiments on line ablation are presented to understand how oblique beams can control the walls conicity.
Eric Audouard, Amelie Letan, Eric Mottay, Mathieu Dijoux, Paul Etienne Martin, Kevin Gaudfrin, John Lopez   +6 more
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Ultrafast Laser Processing of Semiconductor Devices

CLEO:2011 - Laser Applications to Photonic Applications, 2011
SiOnyx is developing ultrafast laser processing techniques that improve the performance of semiconductor based photodetectors, solar cells, and image sensors. Ultrafast laser processing offers the unique ability to locally engineer the structural and doping characteristics of semiconductor devices and avoid adverse side effects.
J.E. Carey, M.U. Pralle, C.J. Vineis, J. McKee, S. Alie, J.W. Sickler, X. Li, J. Jiang, D. Miller, C. Palsule, H. Haddad   +10 more
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Ultrafast laser machining: process optimization and applications

Laser Applications in Microelectronic and Optoelectronic Manufacturing (LAMOM) XXVI, 2021
Over the last decade industrial ultrafast lasers with pulse durations between 300 fs and 10 ps, average output powers of up to 150 W and single pulse energies in the range of 10 to 250 μJ have been deployed in various industrial applications that require microscopic material removal within small areas with minimum heat affected zones.
Norman Hodgson, Albrecht Steinkopff, Sebastian Heming, Hortense Allegre, Hatim Haloui, Tony Lee, Michael Laha, Joris VanNunen   +7 more
openaire   +1 more source

Materials Synthesis and Processing with Ultrafast Lasers

CLEO/Europe Conference on Lasers and Electro-Optics, 1998
As compact ultrafast laser systems, that are affordable and reliable, continue to be developed, interest in their application to practical problems in materials science also continues to expand. Solid state, diode pumped, and fiber based ultrafast laser systems are sufficiently commonplace to encourage an intensification of such applications research ...
P. P. Pronko, P. A VanRompay, G. Mourou
openaire   +1 more source

Ultrafast laser processing of ceramics: Comprehensive survey of laser parameters

Journal of Laser Applications, 2020
The productivity and quality of laser micromachining depend on multiple laser parameters that are intricately correlated. For these optimizations, a quick survey of laser parameters is vital. Recently, the authors developed a Yb-doped fiber chirped-pulse amplification system that can control various laser parameters in a wide range (pulse duration: 0.4–
Aiko Narazaki, Hideyuki Takada, Dai Yoshitomi, Kenji Torizuka, Yohei Kobayashi   +4 more
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Parallel processing of embossing dies with ultrafast lasers

Laser-based Micro- and Nanoprocessing XII, 2018
Functionalization of surfaces equips products and components with new features like hydrophilic behavior, adjustable gloss level, light management properties, etc. Small feature sizes demand diffraction-limited spots and adapted fluence for different materials. Through the availability of high power fast repeating ultrashort pulsed lasers and efficient
Gerald Jenke, Keming Du, Stephan Brüning, Thomas Mitra, Manfred Jarczynski   +4 more
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Ultrafast laser processing and metrology for consumer applications

SPIE Proceedings, 2015
High-intensity, blue LEDs have attracted interest because of their wide applications. Dicing method using tightly focused ultra-fast laser beam inside the sapphire substrate is one of the remarkable processing method in terms of high yield and LED performance.
Naoki Murazawa, Kunimitsu Takahashi
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Ultrafast lasers as a versatile processing tool

SPIE Proceedings, 2000
Ultrafast lasers are a class of laser that produce pulse widths of picoseconds (10 -12 sec) and femtoseconds (10 -15 sec). They can achieve extremely high peak power with low pulse energies. The most important characteristics of ultrafast laser-matter interaction are precise ablation threshold and absence of heat diffusion into the material during ...
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Filamentation in Ultrafast Laser Material Processing

2010
When an ultrashort laser pulse is focused inside the bulk of a transparent material, filamentation occurs as a result of the dynamic balance between the Kerr self-focusing and defocusing effects in the electron plasma, which is generated through the ionization process.
Wataru Watanabe, Takayuki Tamaki, Yasuyuki Ozeki, Kazuyoshi Itoh   +3 more
openaire   +1 more source