Results 1 to 10 of about 44,104 (50)

Optical fiber grating vibration sensor for vibration monitoring of hydraulic pump

open access: yesPhotonic Sensors, 2017
In view of the existing electrical vibration monitoring traditional hydraulic pump vibration sensor, the high false alarm rate is susceptible to electromagnetic interference and is not easy to achieve long-term reliable monitoring, based on the design of
Zhengyi Zhang   +4 more
doaj   +1 more source

Terahertz Radome Inspection

open access: yesPhotonics, 2018
Radomes protecting sensitive radar, navigational, and communications equipment of, e.g., aircraft, are strongly exposed to the environment and have to withstand harsh weather conditions and potential impacts.
Fabian Friederich   +9 more
doaj   +1 more source

Demonstration of a diode-pumped dual-wavelength metastable krypton laser

open access: yesHigh Power Laser Science and Engineering, 2023
Diode-pumped rare gas lasers are potential candidates for high-energy and high-beam quality laser systems. Currently, most investigations are focused on metastable Ar lasers.
Qingshan Liu   +6 more
doaj   +1 more source

TDM-PON PAM Downstream Transmission for 25 Gbit/s and Beyond

open access: yesPhotonics, 2018
The optical access network is currently driving studies on transmissions beyond 10 Gbit/s. This paper reports an analysis of Pulse Amplitude Modulation (PAM), seen as a promising candidate for future Passive Optical Networks (PON).
Sylvain Barthomeuf   +4 more
doaj   +1 more source

Special Issue on Photonic Jet: Science and Application

open access: yesPhotonics, 2022
Photonic jets (PJs) are important mesoscale optical phenomena arising from electromagnetic waves interacting with dielectric particles with sizes around several to several tens wavelengths (~2–40 λ) [...]
Zengbo Wang   +2 more
doaj   +1 more source

Sensitivity enhancement of nonlinear waveguide sensors with conducting graphene layer: TE mode

open access: yesPhotonic Sensors, 2017
We propose a three-layer waveguide sensor. The proposed sensor consists of a graphene thin layer with constant conductivity at the interface between air and dielectric media with thickness d sitting above a nonlinear layer.
Hala J. El-Khozondar   +2 more
doaj   +1 more source

A Surface Plasmon–Polariton in a Symmetric Dielectric Waveguide with Active Graphene Plates

open access: yesPhotonics, 2022
A theoretical study of the plasmon modes’ characteristics is carried out in a structure consisting of two active graphene layers separated by a dielectric barrier layer.
Dmitry A. Evseev   +3 more
doaj   +1 more source

Computational de-noising based on deep learning for phase data in digital holographic interferometry

open access: yesAPL Photonics, 2020
This paper presents a deep-learning-based algorithm dedicated to the processing of speckle noise in phase measurements in digital holographic interferometry.
Silvio Montresor   +3 more
doaj   +1 more source

Short-Term Peripheral Contrast Reduction Affects Central Chromatic and Achromatic Contrast Sensitivity

open access: yesPhotonics, 2022
Peripheral retinal contrast reduction is suggested as a potential myopia control strategy. However, the underlying mechanism is yet unknown. Therefore, this study investigated the influence of peripheral contrast reduction on central chromatic and ...
Antonia Neumann   +6 more
doaj   +1 more source

Ge-Core/a-Si-Shell Nanowire-Based Field-Effect Transistor for Sensitive Terahertz Detection

open access: yesPhotonics, 2018
Although terahertz technology has demonstrated strong potential for various applications, detectors operating in the terahertz region are yet to be fully established.
Xiangying Deng   +2 more
doaj   +1 more source

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