Results 31 to 40 of about 553,597 (280)

High-Efficiency Optical Parametric Oscillator Based on Stimulated Brillouin Scattering Pulse Shaping

open access: yesIEEE Photonics Journal, 2019
We present an optical parametric oscillator (OPO) that uses a pump pulse shape tailored by stimulated Brillouin scattering. The theoretical analysis is carried out for comparison between Gaussian pump and the step function pulse pump.
Yulei Wang   +5 more
doaj   +1 more source

Gm-APD LiDAR Single-Source Data Self-Guided: Obtaining High-Resolution Depth Map

open access: yesIEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2023
Geiger-mode avalanche photodiode (Gm-APD) array LiDAR has become the current research focus due to its sensitive response, high precision, and easy integration. However, due to the limitations of the fabrication process and manufacturing cost, the images
Boyi Song   +5 more
doaj   +1 more source

A one-dimensional tunable magnetic metamaterial [PDF]

open access: yes, 2013
We present experimental data on a one-dimensional superconducting metamaterial that is tunable over a broad frequency band. The basic building block of this magnetic thin-film medium is a single-junction (rf-) superconducting quantum interference device (
Butz, S.   +4 more
core   +3 more sources

Joint Effects of Co-Channel Interferences and Pointing Errors on Dual-Hop Mixed RF/FSO Fixed-Gain and Variable-Gain Relaying Systems

open access: yesIEEE Photonics Journal, 2023
The performance of a dual-hop mixed radio frequency (RF)/free space optical (FSO) system with co-channel interferences (CCIs) is studied for both fixed-gain and variable-gain amplify-and-forward(AF) relaying scenarios.
Junrong Ding   +5 more
doaj   +1 more source

A tunable microcavity

open access: yesJournal of Applied Physics, 2011
We present a generic microcavity platform for cavity experiments on optically active nanostructures, such as quantum dots, nanocrystals, color centers, and carbon nanotubes. The cavity is of the Fabry-Pérot type with a planar back mirror and a miniature concave top mirror with radius of curvature ∼ 100 μm.
Barbour, Russell J.   +8 more
openaire   +3 more sources

Effects of atmospheric turbulence on fiber-coupled DPSK system in Satellite-to-Ground downlink

open access: yesResults in Physics, 2018
Fiber-coupled differential phase-shift keying (DPSK) modulation is potentially an effective approach for further high-speed satellite lasercom, due to the high detection sensitivity, low linewidth requirements, and uncalled-for complex phase-locked loop ...
Qingbo Yang   +6 more
doaj   +1 more source

Tunable pH Sensitive Lipoplexes

open access: yes, 2023
To provide long circulating nanoparticles able to carry a gene to tumor cells, we have designed anionic pegylated lipoplexes which are pH sensitive. The reduction of positive charges in nucleic acid carriers allows reducing the elimination rate, increasing circulation time in the blood, leading to improved tumor accumulation of lipid nanoparticles ...
Dhotel, H, Mignet, N, Bessodes, Michel
openaire   +3 more sources

Ultrathin Tunable Optomechanical Metalens

open access: yesNano Letters, 2023
ISSN:1530 ...
Adeel Afridi   +3 more
openaire   +3 more sources

Quartz-Enhanced Photoacoustic Spectroscopy Sensor with a Small-Gap Quartz Tuning Fork

open access: yesSensors, 2018
A highly sensitive quartz-enhanced photoacoustic spectroscopy (QEPAS) sensor based on a custom quartz tuning fork (QTF) with a small-gap of 200 μm was demonstrated.
Yu-Fei Ma   +4 more
doaj   +1 more source

Explosion plume on the exit surface of fused silica during UV laser- induced damage

open access: yesResults in Physics, 2022
Explosion plume on the exit surface of fused silica during UV laser-induced damage was investigated using a two-color interferometric time-resolved side-viewed imaging system.
Chengyu Zhu   +7 more
doaj   +1 more source

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