Results 321 to 330 of about 1,920,107 (363)

Microstructuring with Femtosecond Lasers

Advanced Engineering Materials, 2000
Using ultrashort laser pluses can cause the ablation of nearly all kinds of materials, leading to very precise machining results with minimal damage. This includes even the machining of delicate materials with high heat conductivities or comparatively low melting temperatures, such as metals, as well as optical transparent and organic materials.
Andreas Ostendorf, Stefan Nolte, G. Kamlage, Frank Korte, Thorsten Bauer, Herbert Welling, Thile Wagner, Carsten Fallnich   +7 more
openaire   +2 more sources

Vortices in femtosecond laser fields

Optics Letters, 2004
We experimentally generate optical vortices in the output beam of a 20-fs Ti:sapphire laser. Screw phase dislocations are imposed on the spectral components of the short pulses by aligning a computer-generated hologram in a dispersionless 4f setup.
M. G. Schaetzel, Kaloyan S. Bezuhanov, Gerhard G. Paulus, Gerhard G. Paulus, Aleksander A. Dreischuh, Herbert Walther   +5 more
openaire   +4 more sources

Superresolved femtosecond laser ablation

Optics Letters, 2007
The determinist behavior of the femtosecond ablation process allows morphing features well under the diffraction limit by utilizing the thresholding effect, down to the nanometer scale. Because there are a vast range of applications where scaling down the size of the features is a major concern, we investigate the use of superresolving pupil plane ...
MERANO, MICHELE, BOYER G, TRISORIO A, CHERIAUX G, MOUROU G.   +4 more
openaire   +4 more sources

High efficiency femtosecond laser ablation with gigahertz level bursts

Journal of laser applications, 2019
The authors report on a simple and easy-to-use GHz amplified femtosecond laser source. The laser source is based on a passively mode-locked oscillator with a near GHz repetition rate.
G. Bonamis, Konstantin Mishchick, É. Audouard, C. Hönninger, E. Mottay, John J. Lopez, I. Manek-Hönninger   +6 more
semanticscholar   +1 more source

Femtosecond laser cataract surgery

Clinical & Experimental Ophthalmology, 2013
Letter to the Editor ; John L ...
John L. Crompton, John L. Crompton
openaire   +4 more sources

Femtosecond Excimer Lasers

SPIE Proceedings, 1989
The bandwidth of most excimer lasers allows the amplification of subpicosecond pulses. In this paper a novel method and experimental arrangement is reported for the generation of femtosecond pulses in the XeF, XeC1 and KrF laser wavelengths. This is based on the use of a hybrid excimer-dye laser arrangement, incorporating a twin tube excimer laser and ...
Fritz P. Schäfer, Sándor Szatmári
openaire   +2 more sources

Femtosecond laser direct writing of microholes on roughened ZnO for output power enhancement of InGaN light-emitting diodes.

Optics Letters, 2016
A significant enhancement of light extraction efficiency from InGaN light-emitting diodes (LEDs) with microhole arrays and roughened ZnO was experimentally demonstrated.
Zhigang Zang, Xiaofeng Zeng, Jihe Du, Ming Wang, Xiaosheng Tang   +4 more
semanticscholar   +1 more source

Ultrabroadband femtosecond lasers

IEEE Journal of Quantum Electronics, 1994
The exploitation of soliton-like pulse shaping mechanisms and the optimization of phase dispersion in broadband self-modelocked solid state laser oscillators have led to unprecedented advances in ultrafast laser technology. This paper reviews the basic physical mechanisms governing pulse formation and addresses the requirements for optimum performance ...
Christian Spielmann, P. F. Curley, Thomas Brabec, Ferenc Krausz   +3 more
openaire   +2 more sources

Bioinspired Design of Underwater Superaerophobic and Superaerophilic Surfaces by Femtosecond Laser Ablation for Anti- or Capturing Bubbles.

ACS Applied Materials and Interfaces, 2017
A micro-/nanoscale hierarchical rough structure inspired by the underwater superaerophobicity of fish scales was fabricated by ablation of a silicon surface by a femtosecond laser.
Jiale Yong, Feng Chen, Yao Fang, Jinglan Huo, Qing Yang, Jingzhou Zhang, H. Bian, X. Hou   +7 more
semanticscholar   +1 more source

Femtosecond laser machining

Technical Digest. Summaries of Papers Presented at the Conference on Lasers and Electro-Optics. Conference Edition. 1998 Technical Digest Series, Vol.6 (IEEE Cat. No.98CH36178), 1998
Summary form only given. The use of femtosecond lasers allows materials processing of practically any material with extremely high precision and minimal collateral damage. Advantages over conventional laser machining (using pulses longer than a few tens of picoseconds) are realized by depositing the laser energy into the electrons of the material on a ...
J.P. Armstrong, Michael D. Perry, Alexander M. Rubenchik, Ronald S. Lee, B.R. Myers, Brent C. Stuart, J.A. Sefcik, Michael D. Feit, F. Roeske, P.S. Banks, H. Nguyen   +10 more
openaire   +2 more sources