Results 81 to 90 of about 7,095 (298)

Spectral Properties of Broadband Pumped Optical Parametric Amplification

open access: yes, 2011
The spectral properties of broadband pumped optical parametric amplification (BPOPA) are investigated theoretically. General mathematical expression to describe the relationship between the pump bandwidth (BW) and the parametric BW is achieved.
Hai Bin Xu
core   +1 more source

From optical parametric oscillation to frequency-comb generation in whispering gallery resonators made of CdSiP2

open access: yes, 2022
Paper 1167004, 6 S.Microresonator frequency combs have seen remarkable progress in the past decade. In this work, we investigate optical parametric oscillation in a mm-sized cadmium silicon phosphide (CdSiP2) whispering gallery resonator for X(2 ...
Amiune, Nicolas   +4 more
core   +1 more source

Tunable High‐Performance Metamaterial Filters Based on Novel SRR Architectures

open access: yesAdvanced Science, EarlyView.
Based on two novel SRR configurations and two independent SRR integration approaches, four tunable bandpass metamaterial filters were fabricated with an ultra‐thin ceramic substrate. Among them, SM‐2 achieves over 97% electromagnetic wave transmittance, with a minimal 1.15% deviation in its resonant frequency prediction, making them promising ...
Lingxi Qu   +4 more
wiley   +1 more source

Quantum Photothermal Self‐Monitoring Fiber Probes for In Vivo Photothermal Therapy

open access: yesAdvanced Science, EarlyView.
A miniaturized quantum photothermal fiber probe based on a metal/polymer/glass composite optoelectronic fiber that simultaneously guides lightwave and microwave was developed for the first time. The probe achieves enhanced photothermal conversion (13°C/mW, 25°C–120°C range) while providing real‐time self‐monitoring with 0.2°C thermal resolution at the ...
Wanjun Li   +12 more
wiley   +1 more source

El Niño–Southern Oscillation effect on quasi-biennial oscillations of temperature diurnal tides in the mesosphere and lower thermosphere

open access: yesEarth, Planets and Space, 2018
In this study, we evaluate the El Niño–Southern Oscillation (ENSO) signals in the two dominant temperature diurnal tides, diurnal westward wavenumber 1 (DW1) and diurnal eastward wavenumber 3 (DE3) on the quasi-biennial oscillation (QBO) scale (18–34 ...
Yang-Yi Sun   +4 more
doaj   +1 more source

A direct numerical simulation of dielectric barrier discharge (DBD) plasma actuators for turbulent skin-friction control [PDF]

open access: yes
Turbulent skin-friction control is the subject of much research and the use of transverse (spanwise) oscillating motions offers the means of obtaining a significant reduction in skin-friction.
Elam, Dana
core  

Neuromorphic Near‐Sensor and In‐Sensor Computing Enabled by Next‐Generation Material‐Based Sensors

open access: yesAdvanced Science, EarlyView.
This Review presents a structural framework that classifies neuromorphic sensing into near‐sensor and in‐sensor architectures, clarifying physical coupling between sensing and computation. The framework connects neural and synaptic device functions with recent advances in optical, mechanical, and chemical sensing, compares energy consumption and ...
Su Yeon Jung   +7 more
wiley   +1 more source

Broadband varactor-tuned GaAs f.e.t. oscillator

open access: yesElectronics Letters, 1980
A broadband varactor-tuned GaAs f.e.t. oscillator (7.4 to 13.1 GHz) is presented, together with measured and predicted performance characteristics. The circuit uses tuning in series with both the gate and the source leads of the device to maintain optimum oscillation conditions across the band.
openaire   +1 more source

Research on Broadband Oscillation Mode Identification Based on Improved Symplectic Geometry Algorithm

open access: yes
The rapid integration of renewable energy sources into modern power systems has exacerbated power quality challenges, particularly broadband oscillation phenomena that threaten grid symmetry and stability.
Rui Zhang   +6 more
core   +1 more source

A reconfigurable multiple-format coherent-dual-band signal generator based on a single optoelectronic oscillation cavity

open access: yes, 2023
An optoelectronic oscillation method with reconfigurable multiple formats for simultaneous generation of coherent dual-band signals is proposed and experimentally demonstrated. By introducing a compatible filtering mechanism based on stimulated Brillouin
Hongyi Wang (2427745)   +8 more
core   +1 more source

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