Results 31 to 40 of about 1,664 (168)
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
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
Distributed temperature-change sensor based on Rayleigh backscattering in an optical fiber [PDF]
Optics Letters, 1994 A frequency-modulated continuous-wave technique is used to detect the presence of frequency shifts in the Rayleigh-backscattered light in a single-mode optical fiber as a result of a changing temperature. The system is able to detect a rate of temperature change of 0.014 K/s, when a 20-cm length of fiber is heated.
Rathod, R. +3 more
openaire +2 more sources
AIP Advances, 2021 The propagation of sound waves in a fluid-filled rigid tube has potential application in acoustic particle-positioning, valuable reagent recovery, and noninvasive manipulation of targets.
Jingyao Shi +3 more
doaj +1 more source
EPJ Web of Conferences, 2016 A new method for independent calibration of water vapor Raman lidar by using additional measurements of elastic signals at water vapor Raman wavelength was introduced.
Wu Decheng +4 more
doaj +1 more source
Performance Improvement of Dual-Pulse Heterodyne Distributed Acoustic Sensor for Sound Detection
Sensors, 2020 Phase fading is fatal to the performance of distributed acoustic sensors (DASs) influencing its capability of distributed measurement as well as its noise level.
Xiangge He +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
Bismuth‐Based Photocatalysts for Water Remediation: Design Strategies, Mechanisms, and Challenges
Advanced Functional Materials, EarlyView.This review highlights representative design strategies for bismuth‐based semiconductor photocatalysts in solar‐driven water purification. Emphasis is placed on electronic structure regulation, oxygen‐vacancy engineering, and interfacial coupling to enable efficient full‐spectrum light utilization, improved charge separation, and selective oxidation in
Shan Liu +9 more
wiley +1 more source
Dynamic suppression of Rayleigh backscattering in dielectric resonators
Optica, 2019 The ultimate limits of performance for any classical optical system are set by sub-wavelength fluctuations within the host material, which may be frozen-in or even dynamically induced. The most common manifestation of such subwavelength disorder is Rayleigh light scattering, which is observed in nearly all waveguiding technologies today and can lead to
Seunghwi Kim +2 more
openaire +1 more source
Strong Lead‐Free Bioinspired Piezoceramics for Durable Energy Transducers
Advanced Functional Materials, EarlyView.We fabricated brick‐and‐mortar lead‐free piezoceramics with Bi0.5Na0.5TiO3 monocrystal platelets as bricks and amorphous silica as mortar. The alignment of the bricks and the presence of the amorphous silica led to anisotropic residual stresses. These residual stresses increase the samples toughness, strength and durability while the brick alignment ...
Ruxue Yang +12 more
wiley +1 more source