Results 11 to 20 of about 7,095 (298)

Backward wave optical parametric oscillation in a waveguide

open access: yesnpj Nanophotonics
Backward wave oscillators represent a class of tunable sources of electromagnetic radiation that do not require a resonant cavity to satisfy the oscillation condition.
Patrick Mutter   +3 more
doaj   +2 more sources

Broadband random optoelectronic oscillator [PDF]

open access: yesNature Communications, 2020
AbstractRandom scattering of light in transmission media has attracted a great deal of attention in the field of photonics over the past few decades. An optoelectronic oscillator (OEO) is a microwave photonic system offering unbeatable features for the generation of microwave oscillations with ultra-low phase noise. Here, we combine the unique features
Zengting Ge   +5 more
openaire   +4 more sources

Development and application of broadband monitoring systems in power grids

open access: yesZhejiang dianli, 2023
With the large-scale integration of distributed new energy sources into power grids and the wide application of power electronics, the power grid’s risk of oscillation has reached epidemic proportions and is resolving into broadband domain oscillation ...
SU Rongqiang   +6 more
doaj   +1 more source

µJ-level normal dispersion fiber optical parametric chirped-pulse oscillator based on a collapsed-ends photonic crystal fiber [PDF]

open access: yesEPJ Web of Conferences, 2023
We demonstrate the generation of broadband tunable and synchronized pulses exceeding the microjoule level using the new concept of fiber optical parametric chirped-pulse oscillation (FOPCPO).
Guezennec Tristan   +8 more
doaj   +1 more source

Identification of Mode Shapes Based on Ambient Signals and the IA-VMD Method

open access: yesApplied Sciences, 2021
The paper presents a multiaspect analysis of multivalues and the broadband nature of system oscillation. By analyzing the ambient signal caused by random small disturbances during the normal operation of interconnected power grids, many system operation ...
Fang Liu   +5 more
doaj   +1 more source

Research on oscillation characteristics of wind farm sending system based on participation factor

open access: yesFrontiers in Energy Research, 2022
The MMC-HVDC transmission system of wind farms has a very broad application prospect, but there is gradually growing major concern that the system is prone to broadband oscillation. And the mechanism of oscillation also remains to be clarified.
Qiu Peng   +5 more
doaj   +1 more source

Broadband Chaos Generated by an Optoelectronic Oscillator [PDF]

open access: yesPhysical Review Letters, 2010
We study an opto-electronic time-delay oscillator that displays high-speed chaotic behavior with a flat, broad power spectrum. The chaotic state coexists with a linearly-stable fixed point, which, when subjected to a finite-amplitude perturbation, loses stability initially via a periodic train of ultrafast pulses. We derive an approximate map that does
Callan, Kristine E   +4 more
openaire   +3 more sources

Broadband amplitude-stabilized oscillator [PDF]

open access: yesThe Eighth International Conference on Advanced Semiconductor Devices and Microsystems, 2010
In many applications we need oscillators tunable over a considerable frequency range by simple LC circuits with broadly varying dynamic resistances (quality factor Q of the reactances), while insisting on keeping a rather constant amplitude of the A.C.
Julius Foit, Jan Novak
openaire   +1 more source

Subcortical Source and Modulation of the Narrowband Gamma Oscillation in Mouse Visual Cortex [PDF]

open access: yes, 2017
Primary visual cortex exhibits two types of gamma rhythm: broadband activity in the 30-90 Hz range and a narrowband oscillation seen in mice at frequencies close to 60 Hz.
Busse, L   +9 more
core   +3 more sources

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