Results 31 to 40 of about 3,007,416 (292)

Underwater Depth and Temperature Sensing Based on Fiber Optic Technology for Marine and Fresh Water Applications

open access: yesSensors, 2017
Oceanic conditions play an important role in determining the effects of climate change and these effects can be monitored through the changes in the physical properties of sea water. In fact, Oceanographers use various probes for measuring the properties
Dinesh Babu Duraibabu   +5 more
doaj   +1 more source

Nonlinear co-generation of graphene plasmons for optoelectronic logic operations

open access: yesNature Communications, 2022
Nano-photonic devices based on 2D materials offer a potential solution for the miniaturization of optical computing technologies. Here, the authors demonstrate the implementation of high-speed logic operations via the all-optical generation and ...
Yiwei Li   +15 more
doaj   +1 more source

Self-Imaging Effect in Liquid-Filled Hollow-Core Capillary Waveguide for Sensing Applications

open access: yesSensors, 2019
A high sensitivity fiber-optic sensor based on self-imaging effect in a hollow-core capillary waveguide (HCCW) is presented for sensing applications. The sensor is composed of a section of HCCW fusion spliced between single mode fibers (SMFs).
Yijian Huang   +4 more
doaj   +1 more source

Multiplexing a serial array of tapered optical fibre sensors using coherent optical frequency domain reflectometry [PDF]

open access: yes, 2012
The use of high spatial resolution optical frequency domain reflectometry (OFDR) to facilitate the multiplexing of a serial array of tapered optical fibre sensors is presented.
Tatam, Ralph P.   +3 more
core   +1 more source

Theoretical and experimental performance evaluation methods for DD-OFDM systems with optical amplification

open access: yesJournal of Microwaves, Optoelectronics and Electromagnetic Applications
Several methods have been proposed to evaluate theoretically and experimentally the performance of optically amplified direct-detection orthogonal frequency division multiplexing systems.
Adolfo V. T. Cartaxo, Tiago M. F. Alves
doaj   +1 more source

Fabrication of Step−Index Fluorotellurite Fibers with High Numerical Aperture for Coherent Mid—Infrared Supercontinuum

open access: yesCrystals, 2022
We demonstrate the fabrication process and coherent supercontinuum (SC) generation of fluorotellurite step−index fibers with a high numerical aperture (0.56 and 0.64 at 1552 nm).
Yu Li   +3 more
doaj   +1 more source

An Optical Fibre Depth (Pressure) Sensor for Remote Operated Vehicles in Underwater Applications

open access: yesSensors, 2017
A miniature sensor for accurate measurement of pressure (depth) with temperature compensation in the ocean environment is described. The sensor is based on an optical fibre Extrinsic Fabry-Perot interferometer (EFPI) combined with a Fibre Bragg Grating ...
Dinesh Babu Duraibabu   +8 more
doaj   +1 more source

Optical network physical layer parameter optimization for digital backpropagation using Gaussian processes

open access: yesData-Centric Engineering, 2023
We present a novel methodology for optimizing fiber optic network performance by determining the ideal values for attenuation, nonlinearity, and dispersion parameters in terms of achieved signal-to-noise ratio (SNR) gain from digital backpropagation (DBP)
Josh W. Nevin   +6 more
doaj   +1 more source

Secure and Efficient Key Coordination Algorithm for Line Topology Network Maintenance for Use in Maritime Wireless Sensor Networks

open access: yesSensors, 2016
There has been a significant increase in the proliferation and implementation of Wireless Sensor Networks (WSNs) in different disciplines, including the monitoring of maritime environments, healthcare systems, and industrial sectors.
Walid Elgenaidi   +4 more
doaj   +1 more source

High-Sensitivity Detection of IgG Operating near the Dispersion Turning Point in Tapered Two-Mode Fibers

open access: yesMicromachines, 2020
The conventional methods for monitoring IgG levels suffer from some apparent problems such as long assay time, multistep processing, and high overall cost.
Bing Sun, Yiping Wang
doaj   +1 more source

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