Results 191 to 200 of about 84,612 (251)

Non-reciprocal femtosecond laser micromachining

2008 Conference on Lasers and Electro-Optics, 2008
The authors demonstrate both experimentally and theoretically that in a non-centrosymmetric crystal modification of the material can be different when femtosecond laser beam propagates in opposite directions. Our result presents the first evidence of non-reciprocal photosensitivity.
Peter G. Kazansky, Weijia Yang, Yuri P. Svirko   +2 more
openaire   +1 more source

Characterization of Additively Manufactured Suspended Finite Ground CPW Interconnects Enhanced by Femtosecond Laser Micromachining

IEEE Transactions on Components, Packaging, and Manufacturing Technology
Suspended finite ground coplanar waveguide (FG-CPW) interconnects, fabricated with laser-enhanced direct print additive manufacturing (AM), are modeled and characterized in this work.
O. Firat, Jing Wang, T. Weller
semanticscholar   +1 more source

Femtosecond laser micromachining of silicon for MEMS

SPIE Proceedings, 2003
Laser micromachining of n-type silicon wafer was studied using femtosecond laser operating at 400 and 800 nm wavelengths. The fundamental wavelength was used to fabricate a diaphragm of 4 mm diameter using a computer controlled galvo head. The laser pulsewidth was 110 fs, repetition rate of 1 kHz, and maximum average power of 2 W.
Mohammed El-Bandrawy, Mool C. Gupta
openaire   +1 more source

The physics and limits of femtosecond laser micromachining

(CLEO). Conference on Lasers and Electro-Optics, 2005., 2005
Laser-induced optical breakdown by femtosecond pulses is extraordinarily precise when the energy is near threshold. We examine the limits of femtosecond machining through studies of damage induced by tightly focused pulses in a variety of materials.
K. Ke, A.P. Joglekar, null Hsiao-hu, E. Meyhofer, E. Hasselbrink, G. Mourou, A.J. Hunt   +6 more
openaire   +1 more source

Multiple-pulse Laser-induced breakdown spectroscopy for monitoring the femtosecond laser micromachining process of glass

Optics and Laser Technology, 2019
Laser-induced breakdown spectroscopy (LIBS) can be applied for laser micromachining not only as a tool for determining the chemical composition of the sample but also for monitoring the process itself.
Ona Balachninaite, Simas Butkus, V Vaicaitis   +2 more
exaly   +2 more sources

Surface structure modification of additively manufactured titanium components via femtosecond laser micromachining

Optics Communications, 2019
With the recent rise of laser additive manufacturing (AM), it has become critical to streamline the process from concept to the finished component. In this paper we demonstrate novel capabilities achieved through post-processing of the laser AM part by ...
Nathan Worts, Jeff Squier
exaly   +2 more sources

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

Second-harmonic computer-generated holographic imaging through monolithic lithium niobate crystal by femtosecond laser micromachining.

Optics Letters, 2020
The computer-generated holography technique is a powerful tool for three-dimensional display, beam shaping, optical tweezers, ultrashort pulse laser parallel processing, and optical encryption.
B. Zhu, Haigang Liu, Yi’an Liu, Xiongshuo Yan, Yuping Chen, Xianfeng Chen   +5 more
semanticscholar   +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

Enhanced light extraction of light-emitting diodes with micro patterns by femtosecond laser micromachining for visible light communication.

Optics Letters, 2020
A significant enhancement of light extraction of light-emitting diodes (LEDs) with micro patterns has been experimentally investigated. The micro patterns on the surface of a polymer layer are fabricated by a femtosecond laser Bessel beam for obtaining ...
Fan Zhang, Cong Xu, Kai Yin, Ji’an Duan   +3 more
semanticscholar   +1 more source