Results 51 to 60 of about 1,847,375 (374)
Photonics, 2019 A novel technique is proposed to implement optical signal-to-noise ratio (OSNR) estimation by using an improved binary particle swarm optimization (IBPSO) and deep neural network (DNN) based on amplitude histograms (AHs) of signals obtained after ...
Xiaoyong Sun +4 more
doaj +1 more source
All-optical differential current detection technique for unit protection applications [PDF]
, 2013 In this paper we demonstrate a novel, all-optical differential current protection scheme. By monitoring the optical power reflected from two matched hybrid fiber Bragg grating current sensors and using a simple optoelectronic threshold detector, an ...
Fusiek, Grzegorz +3 more
core +1 more source
IEEE Photonics Journal, 2023 In this paper, a joint OSNR and nonlinear noise power estimation scheme based on multi-task deep neural network (MT-DNN) is proposed with the advantages of dispersion-insensitive, modulation-format-transparent for high-speed, long-haul, multi-channel ...
Mengyan Li +6 more
doaj +1 more source
The Use of an Optical Measurement System to Monitor Sports Performance [PDF]
Sports, 2018 The purpose of this study was to compare ground contact time between an optical measurement system and a force platform. Participants in this study included six collegiate level athletes who performed drop jumps and sprint strike steps for a total of 15 repetitions each.
Eric D. Magrum +4 more
openaire +5 more sources
Machine Learning-Based Multifunctional Optical Spectrum Analysis Technique
IEEE Access, 2019 A machine learning (ML)-based multifunctional optical spectrum analysis technique is proposed to perform not only the conventional analysis functions but also the extended analysis functions, including center wavelength detection, optical signal-to-noise
Danshi Wang +6 more
doaj +1 more source
A generalized differential image motion monitor [PDF]
MNRAS 486, 915 (2019), 2019 We present the Generalised Differential Image Motion Monitor. It is a compact instrument dedicated to measure 4 parameters of the optical turbulence: seeing, isoplanatic angle, coherence time and wavefront coherence outer scale. GDIMM is based on a small telescope (28cm diameter) equipped with a 3-holes mask at its entrance pupil.
arxiv +1 more source
A Quantum Technique for Monitoring Physical Layer Security of Optical Communication [PDF]
, 2020 Optical fibre networks are advancing rapidly to meet growing traffic demands. Security issues, including attack management, have become increasingly important for optical communication networks owing to the vulnerabilities associated with tapping light ...
core +2 more sources
Pulsed laser deposition with simultaneous in situ real-time monitoring of optical spectroscopic ellipsometry and reflection high-energy electron diffraction [PDF]
Rev. Sci. Instrum. 84, 043902 (2013), 2013 We present a pulsed laser deposition (PLD) system that can monitor growth by simultaneously using in situ optical spectroscopic ellipsometry (SE) and reflection high-energy electron diffraction (RHEED). The RHEED precisely monitors the number of thin-film layers and surface structure during the deposition and the SE measures the optical spectra of the ...
arxiv +1 more source
IEEE Photonics Journal, 2012 We propose and demonstrate a chromatic dispersion (CD) monitoring technique for a nonreturn-to-zero differential phase-shift keying (NRZ-DPSK) signal generated with a Mach-Zehnder modulator at 40 Gb/s by analyzing the waveform overshoot after ...
Zhao Wu, Yu Yu, Xinliang Zhang
doaj +1 more source
Experimental Demonstration of Linear Inter-Channel Interference Estimation Based on Neural Networks
IEEE Photonics Journal, 2023 In this paper, an algorithm for the estimation of the linear inter-channel crosstalk in a dense-WDM polarization-multiplexed 16-QAM transmission scenario is proposed and demonstrated.
A. Hraghi +4 more
doaj +1 more source