Results 31 to 40 of about 14,728 (161)
Applied Sciences, 2019 In this work, a record of 16 channels, with future channel spacing in the telecommunication standardization sector of the International Telecommunications Union G.694.1 (ITU-T G.694.1) for Dense Wavelength Division Multiplexing (DWDM) (i.e., 12.5 GHz ...
Nazmi A. Mohammed, Ahmed Hamdi Mansi
doaj +1 more source
GPR clutter amplitude processing to detect shallow geological targets [PDF]
, 2018 The analysis of clutter in A-scans produced by energy randomly scattered in some specific geological structures, provides information about changes in the shallow sedimentary geology.
Pérez Gracia, María de la Vega +2 more
core +2 more sources
Spectral Dependence of Coherent Backscattering of Light in a Narrow-Resonance Atomic System [PDF]
, 2003 We report a combined theoretical and experimental study of the spectral and polarization dependence of near resonant radiation coherently backscattered from an ultracold gas of 85Rb atoms. Measurements in an approximately 6 MHz range about the 5s^{2}S_{1/
C. I. Sukenik +9 more
core +3 more sources
Open Source SDR Frontend and Measurements for 60-GHz Wireless Experimentation
IEEE Access, 2015 This paper aims to make 60-GHz experimentation possible for a wider range of research groups. We do this by describing a low-cost front-end that can be used in combination with any baseband processing platform.
Per Zetterberg, Ramin Fardi
doaj +1 more source
Rayleigh Backscattering Noise Alleviation in Long-Reach Ring-Based WDM Access Communication
IEEE Access, 2020 In the paper, we propose and design a ring-topology wavelength-division-multiplexing (WDM) access network for long-reach signal transmission. Here, the new central office (CO) and optical network unit (ONU) modules are designed to construct the ring ...
Chien-Hung Yeh +4 more
doaj +1 more source
Coherent Backscattering of light in a magnetic field
, 1999 This paper describes how coherent backscattering is altered by an external magnetic field. In the theory presented, magneto-optical effects occur inside Mie scatterers embedded in a non-magnetic medium.
A. A. Golubentsev +23 more
core +1 more source
SHM of Reinforced Concrete Elements by Rayleigh Backscattering DOFS
Frontiers in Built Environment, 2019 This document showcases the latest research conducted within UPC–BarcelonaTech on the performance of distributed optical fiber sensors (DOFS), more specifically the case of the optical backscattered reflectometry (OBR) system, in the structural health ...
António Barrias +2 more
doaj +1 more source
Hybrid WDM FSO Fiber Access Network With Rayleigh Backscattering Noise Mitigation
IEEE Access, 2020 In the paper, we present and investigate an integrated wavelength-division-multiplexing (WDM) free space optical (FSO) fiber access network for 51 km long-reach connection. Here, the proposed network architecture also can mitigate Rayleigh backscattering
Chien-Hung Yeh +3 more
doaj +1 more source
25-GHz-Spaced DWDM-PON With Mitigated Rayleigh Backscattering and Back-Reflection Effects
IEEE Photonics Journal, 2013 A novel 25-GHz-spaced dense wavelength-division multiplexing passive optical network (DWDM-PON) is proposed to improve the utilization of wavelength resource and mitigate the Rayleigh backscattering (RB) and back-reflection effects.
Zhao Zhou +5 more
doaj +1 more source
Tunable Raman fiber laser induced by Rayleigh back-scattering in an ultra-long cavity [PDF]
Journal of the European Optical Society-Rapid Publications, 2011 We report an ultra-long Raman laser with a 46 km fiber length that behaved as a Rayleigh back-scattering–based optical feedback. The laser was tunable from 1550 nm to 1571 nm (3 dB bandwidth) with the insertion of an optical grating filter.
Sarmani A. R. +5 more
doaj +1 more source