Concept
Fundamental frequency
Related publications (141)
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The paper proposes a synchropahsor estimation (SE) algorithm that leverages the use of a delayed in-quadrature complex signal to mitigate the self-interference of the fundamental tone. The estimator, which uses a three-point IpDFT combined with a three-cyc ...
2023Dynamic behavior of exposed geomembrane systems in pressure waterways
Giovanni De Cesare, Samuel Luke Vorlet, Roberto Proença Seixas
Geomembrane systems have been used in dams and reservoirs as rehabilitation technology since several decades and are now used worldwide. They act as impervious layer to prevent and mitigate water leakage and damage to structures. They meet the needs of man ...
CRC Press/Balkema2023Tunable photo-induced second-harmonic generation in a mode-engineered silicon nitride microresonator
Camille Sophie Brès, Jianqi Hu, Anton Stroganov, Boris Zabelich, Edgars Nitiss
All-optical poling enables reconfigurable and efficient quasi-phase-matching for second-order parametric frequency conversion in silicon nitride integrated photonics. Here, we report broadly tunable milliwatt-level second-harmonic generation in a small fre ...
Optica Publishing Group2023Nonlinear Frequency Conversion in III-Nitride Doubly Resonant Photonic Crystal Cavities
Nonlinear frequency conversion processes, such as second-harmonic generation (SHG) and spontaneous parametric down-conversion (SPDC), are essential in many applications, including the generation of entangled photons. It's desirable to enhance these process ...
EPFL2023A chip-scale second-harmonic source via self-injection-locked all-optical poling
Tobias Kippenberg, Camille Sophie Brès, Marco Clementi, Junqiu Liu, Edgars Nitiss
Second-harmonic generation allows for coherently bridging distant regions of the optical spectrum, with applications ranging from laser technology to self-referencing of frequency combs. However, accessing the nonlinear response of a medium typically requi ...
2023Application of ray methods to one-dimensional site response of inhomogeneous soil deposits
The technique referred as ray approximation treats wave propagation in a heterogeneous medium at the infinitely small wavelength limit. This classic simplification allows useful approximate analytical results to be obtained in cases where complete descript ...
2022Dynamics of entrapped microbubbles with multiple openings
Mahmut Selman Sakar, Murat Kaynak, Amit Yedidia Dolev
Microbubbles excited by acoustic fields inside water oscillate, and generate acoustic radiation forces and drag-induced acoustic streaming. These forces can be harnessed in various biomedical applications such as targeted drug delivery and on-chip biomanip ...
2022Experimental Study to Validate an Improved Approach to Design Acceleration-Sensitive Nonstructural Components
Dimitrios Lignos, Ahmed Mohamed Ahmed Elkady
Nonstructural components in buildings can be subjected to very large acceleration and deformation demands during earthquakes. This is particularly true for flexible components that are tuned or nearly tuned to one of the modal frequencies of the supporting ...
Applied Technology Council, Sponse2022Isogeometric Kirchhoff-Love shell patches in free and forced vibration of sinusoidally corrugated FG carbon nanotube-reinforced composite panels
Application of the isogeometric method is illustrated for free and forced vibration analyzes of sinusoidally corrugated functionally graded carbon nanotube reinforced composite (FG-CNTRC) thin panels. These panels can be used as a potential structure for m ...
ELSEVIER SCI LTD2022Hierarchical tensile structures with ultralow mechanical dissipation
Tobias Kippenberg, Alberto Beccari, Amirali Arabmoheghi, Nils Johan Engelsen, Sergey Fedorov
Structural hierarchy is found in myriad biological systems and has improved man-made structures ranging from the Eiffel tower to optical cavities. In mechanical resonators whose rigidity is provided by static tension, structural hierarchy can reduce the di ...
NATURE PORTFOLIO2022