Results 171 to 180 of about 6,005 (217)

OCT-aided femtosecond laser micromachining device

SPIE Proceedings, 2009
Fs-lasers are widely used for microsurgery and micromachining. Due to nonlinear interaction of ultrashort pulses with tissue or matter precisions of a few μm can be achieved. But particularly in the field of surgery this precision can not be obtained as the devices for diagnostics and treatment have to be changed due to separate systems.
Ole Massow, Michael Jackstadt, Henning Wisweh, Fabian Will, Holger Lubatschowski   +4 more
openaire   +1 more source

Femtosecond laser micromachining and biological therapy

Laser Physics, 2008
Nonlinear micromachining with femtosecond laser pulses has attracted much attention in microphotonics and biophotonics. In this paper, we demonstrate the fabrication of optical elements in bulk transparent materials, direct welding between transparent substrates, and subcellular ablation in living cells by focusing femtosecond laser pulses.
W. Watanabe, T. Tamaki, K. Itoh
openaire   +1 more source

Introduction to micromachining with femtosecond laser pulses

ICALEO 2002: 21st International Congress on Laser Materials Processing and Laser Microfabrication, 2002
Micromachining with lasers is an evolving technology. Initially laser micromachining was based on continuous-wave or long-pulse lasers. However, these lasers, transferred heat to the work piece, introducing limitations in the precision and quality of the machining process.
Philippe Bado, Ali Said, William Clark
openaire   +1 more source

Femtosecond Laser Micromachining for Volume Optics Fabrication

Conference on Lasers and Electro-Optics/International Quantum Electronics Conference, 2009
A femtosecond laser is used to create a new type of volumetric diffractive optical element. The structured elements are designed to perform diffractive functions including pattern generation, and angular multiplexing.
Tim D. Gerke, Rafael Piestun
openaire   +1 more source

Femtosecond Laser Micromachining of a-Si:H

2014
Femtosecond laser micromachining has been used to write bulk waveguides and photonic devices in glasses, polymers, and crystalline silicon (Gattass and Mazur, Nat Photonics 2:219–225, 2008). Refractive index changes in these materials tend to be less than a percent, which sets limitations on applications due to low light confinement.
Michael Moebius, E. Mazur
openaire   +1 more source

Femtosecond laser micromachining of technical materials

Proceedings of SPIE, 2000
ABSTRACT Micromachining experiments were performed with Ti:sapphire laser pulses (130 fs - 150 fs, 800 nm, -40 Hz) in air. Employing the direct focusing technique, highly absorbing titanium nitride (TiN) and weakly absorbing polyiniide (P1) andpolymethylmethacrylate (PMMA) served as target materials.
openaire   +1 more source

Femtosecond laser micromachining of microfluidic fiber sensors

2016 15th International Conference on Optical Communications and Networks (ICOCN), 2016
Migration of lab-on-chip configurations into the optical fiber platform opens the revolutionary prospect of lab-in-fiber systems on the basis of an efficient optical transport highway for multifunctional sensing. In this paper, three-dimensional microfluidic channels patterning inside the fiber by femtosecond laser ablation, femtosecond laser assisted ...
null Changrui Liao, null Lei Xu, null Zhengyong Li, null Feng Zhu, null Tianhang Yang, null Kuikui Guo, null Yiping Wang   +6 more
openaire   +1 more source

Femtosecond Laser Micromachining of Metal Thin Films

Materials Today: Proceedings, 2019
Abstract In this paper the possibilities of femtosecond laser micromachining of thin-film titanium coatings for elements of microelectronics and optoelectronics are considered. Using pulsed laser deposition in vacuum (wavelength λ = 1030 nm, pulse repetition frequency f = 10 kHz, Emax pulse energy ≈ 150 μJ, pulse duration τ ≈ 280 fs), a thin-film ...
Ruslan Chkalov, Kirill Khorkov, Dmitriy Kochuev   +2 more
openaire   +1 more source

Micromachining of copper by femtosecond laser pulses

Applied Surface Science, 2013
Abstract Simulation results of femtosecond laser ablation of copper were compared to experimental data. The numerical analysis was performed using a predictive model, including a two temperature model, an optical critical point model with three Lorentzian terms, two phase change models for melting and evaporation under superheating, and a phase ...
S.Y. Wang, Y. Ren, C.W. Cheng, J.K. Chen, D.Y. Tzou   +4 more
openaire   +1 more source

Micromachining of SiC by femtosecond laser ablation

Technical Digest. CLEO/Pacific Rim 2001. 4th Pacific Rim Conference on Lasers and Electro-Optics (Cat. No.01TH8557), 2002
High-speed etching of single-crystal 6H-SiC by femtosecond Ti:sapphire laser ablation was demonstrated. Fine line pattern of 60 /spl mu/m in depth was fabricated with relatively smooth etched surface with little damage.
N. Aoki, K. Sugioka, K. Obata, T. Akane, T. Takahashi, S.H. Cho, H. Kumagai, K. Toyoda, K. Midorikawa   +8 more
openaire   +1 more source