Results 71 to 80 of about 3,154,738 (335)
Recent advances in ultrafast optical parametric oscillator frequency combs [PDF]
, 2014 We discuss recent advances in the stabilization and application of femtosecond frequency combs based on optical parametric oscillators (OPOs) pumped by femtosecond lasers at 800 and 1060 nm.
Reid, Derryck T.; id_orcid +2 more
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Advanced Engineering Materials, EarlyView.Enhancing ultrasound transmission through an aberration layer exhibiting mismatched impedance with the surrounding medium possesses great implications in imaging and treatment. In this study, we show that a space‐coiling acoustic metamaterial with judiciously tailored structural profile can help improve impedance matching.
Maral Ghanami +4 more
wiley +1 more source
Advanced Engineering Materials, EarlyView.Binder‐free laser powder bed fusion of 8YSZ with a femtosecond laser is used to map process windows linking scan strategy, heat accumulation, and grain growth. Time‐resolved thermography and simulations reveal thermal regimes that enable continuous, vitrified, and fine‐grained 8YSZ surface layers without absorptive additives and demonstrate ...
Markus Kühn +5 more
wiley +1 more source
International Journal of Extreme ManufacturingThere is a perpetual pursuit for free-form glasses and ceramics featuring outstanding mechanical properties as well as chemical and thermal resistance.
Nianyao Chai +5 more
doaj +1 more source
Raman spectra study on modifications of BK7 glass induced by 1030-nm and 515-nm femtosecond laser
Results in Physics, 2021 The direct femtosecond laser writing has been proved to be one of the most efficient techniques for micro-structuring of transparent materials, which can induce refractive index modifications to construct waveguide structures. In this work, laser-induced
Jiaming Wu +6 more
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Continuous wave and modelocked femtosecond novel bulk glass lasers operating around 2000 nm [PDF]
, 2010 This thesis reports on the development of glass-based femtosecond laser sources around 2 µm wavelength. In order to be able to produce 2 µm radiation the dopants used were trivalent Thulium (Tm³⁺) and trivalent Holmium (Ho³⁺) that could be optically ...
Fusari, Flavio +18 more
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Surgical applications of femtosecond lasers [PDF]
Journal of Biophotonics, 2009 AbstractFemtosecond laser ablation permits non‐invasive surgeries in the bulk of a sample with submicrometer resolution. We briefly review the history of optical surgery techniques and the experimental background of femtosecond laser ablation. Next, we present several clinical applications, including dental surgery and eye surgery.
Samuel H, Chung, Eric, Mazur
openaire +2 more sources
Structure‐Guided Dynamical Mechanics in Bioinspired Double Twisted Laminated Thin Films
Advanced Functional Materials, EarlyView.This work explores a dynamic mechanistic study of crack propagation and puncture testing via real‐time monitoring of crack initiation, propagation, and termination through nature‐inspired single and double twisted architectures fabricated from cellulose nanocrystals.
Justin Brackenridge +4 more
wiley +1 more source
New science and art of femtosecond laser writing
, 2009 Common beliefs that laser writing does not change when reversing beam scan or propagation direction are challenged. Recently discovered phenomena of quill and non-reciprocal femtosecond laser writing in glasses and crystals are ...
Kazansky, Peter G.
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High fidelity femtosecond pulses from an ultrafast fiber laser system via adaptive amplitude and phase pre-shaping [PDF]
, 2009 We report the generation of a 12.6W average power, 50MHz repetition rate pulse train, compressible to high fidelity 170fs pulses, from an ultrafast ytterbium-doped fiber laser system via adaptive amplitude and phase pre ...
Shepherd, D.P. +11 more
core +2 more sources