Browsing by Keywords "Ultrafast lasers"
Now showing items 1-14 of 14
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Development of a rapid-scan fiber-integrated terahertz spectrometer
(Springer New York LLC, 2014)Scientists in terahertz (THz) wave technologies have benefited from the recent developments in ultrafast laser technologies and RF technologies and applied these new gained techniques into characterizing a wide variety of ... -
Discrete similariton and dissipative soliton modelocking for energy scaling ultrafast thin-disk laser oscillators
(Institute of Electrical and Electronics Engineers, 2018)Since their first demonstration, modelocked thin-disk lasers have consistently surpassed other modelocked oscillator technologies in terms of achievable pulse energy and average power by several orders of magnitude. ... -
Femtosecond laser crystallization of amorphous Ge
(American Institute of Physics, 2011)Ultrafast crystallization of amorphous germanium (a-Ge) in ambient has been studied. Plasma enhanced chemical vapor deposition grown a-Ge was irradiated with single femtosecond laser pulses of various durations with a range ... -
Femtosecond laser written waveguides deep inside silicon
(Optical Society of America, 2017)Photonic devices that can guide, transfer, or modulate light are highly desired in electronics and integrated silicon (Si) photonics. Here, we demonstrate for the first time, to the best of our knowledge, the creation of ... -
Femtosecond laser-induced TiO2 nano structures on titanium
(Optical Society of America, 2010)We report formation of polarization-dependent nanostructures (nanolines, nanocircles) by high repetition-rate femtosecond laser pulses on titanium surface through a novel mechanism, converting Ti to TiO2. Arbitrarily ... -
Geometric parametric instability of femtosecond pulses in graded-index multimode fiber
(Optical Society of America, 2017)We numerically and experimentally study the spatio-temporal femtosecond pulse evolution in graded-index multimode fiber at normal dispersion regime. We report the first demonstration of geometric parametric instability ... -
Long-term repetition-frequency stabilization of all-normal-dispersion Yb-doped fiber laser to the cesium standard
(OSA, 2010)Repetition-frequency stabilization of a Yb-doped fiber laser to the Cesium standard is reported. Laser amplitude and phase noise is characterized. Performance is limited to 2x10-14 at 100000 averaging time by intrinsic ... -
Multi-GHz burst-mode fiber lasers
(Institute of Electrical and Electronics Engineers, 2020)Ultrafast lasers with GHz repetition rates is necessary to access the highly efficient ablation-cooled laser-material processing regime. Burst-mode operation allows access to such high repetition rates at microjoule-level ... -
Nanosecond pulsed laser ablated sub-10 nm silicon nanoparticles for improving photovoltaic conversion efficiency of commercial solar cells
(Institute of Physics Publishing Ltd., 2017)In this paper, we demonstrate the enhancement of photovoltaic (PV) solar cell efficiency using luminescent silicon nanoparticles (Si-NPs). Sub-10 nm Si-NPs are synthesized via pulsed laser ablation technique. These ultra-small ... -
Nonlinear laser lithography for indefinitely large-area nanostructuring with femtosecond pulses
(Nature publishing group, 2013)Dynamical systems based on the interplay of nonlinear feedback mechanisms are ubiquitous in nature. Well-understood examples from photonics include mode locking and a broad class of fractal optics, including self-similarity. ... -
Spatiotemporal instability of femtosecond pulses in graded-index multimode fibers
(Institute of Electrical and Electronics Engineers Inc., 2017)We study the spatiotemporal instability generated by a universal unstable attractor in normal dispersion graded-index multimode fiber for femtosecond pulses for the first time. Experimentally observed spatiotemporal ... -
Surface texturing of dental implant surfaces with an ultrafast fiber laser
(Optical Society of America, 2010)Controlled modification of implant surfaces using femtosecond, picosecond and nanosecond pulses from home-built all-fiber-integrated lasers is demonstrated. Picosecond and femtosecond pulses offer superior control over the ... -
Synthesis of blue-shifted luminescent colloidal GaN nanocrystals through femtosecond pulsed laser ablation in organic solution
(Springer Netherlands, 2016-05)We demonstrate the synthesis of GaN nanocrystals (NCs) with the sizes of less than the doubled exciton Bohr radius leading quantum confinement effects via a single-step technique. The generation of colloidal GaN nanoparticles ... -
Terahertz time-domain study of silver nanoparticles synthesized by laser ablation in organic liquid
(IEEE Microwave Theory and Techniques Society, 2016-07)We report the investigation of laser-synthesized Ag nanoparticles (Ag-NPs) in an organic liquid environment by using terahertz time-domain spectroscopy (THz-TDS) technique. Colloidal Ag-NPs with an average diameter of 10 ...
