Results 31 to 40 of about 3,116,731 (322)

Recent Improvement of Medical Optical Fibre Pressure and Temperature Sensors

open access: yesBiosensors, 2015
This investigation describes a detailed analysis of the fabrication and testing of optical fibre pressure and temperature sensors (OFPTS). The optical sensor of this research is based on an extrinsic Fabry–Perot interferometer (EFPI) with integrated ...
Sven Poeggel   +7 more
doaj   +1 more source

An Experimental Study of the Effects of External Physiological Parameters on the Photoplethysmography Signals in the Context of Local Blood Pressure (Hydrostatic Pressure Changes)

open access: yesSensors, 2017
A comprehensive study of the effect of a wide range of controlled human subject motion on Photoplethysmographic signals is reported. The investigation includes testing of two separate groups of 5 and 18 subjects who were asked to undertake set exercises ...
Hongwei Yuan   +5 more
doaj   +1 more source

Application of distributed optical fiber sensors for the health monitoring of two real structures in Barcelona [PDF]

open access: yes, 2018
This is an Accepted Manuscript of an article published by Taylor & Francis Group in Structure and Infrastructure Engineering on 2018, available online at: http://www.tandfonline.com/10.1080/15732479.2018.1438479The versatility and ease of installation of
Barrias, Antonio Jose de Sousa   +3 more
core   +2 more sources

Optical Fibre Capacity Optimisation via Continuous Bandwidth Amplification and Geometric Shaping

open access: yesIEEE Photonics Technology Letters, 2020
The maximum data throughput in a single mode optical fibre is a function of both the signal bandwidth and the wavelength-dependent signal-to-noise ratio (SNR).
L. Galdino   +11 more
semanticscholar   +1 more source

Ultrahigh numerical aperture meta-fibre for flexible optical trapping

open access: yesLight: Science & Applications, 2021
Strong focusing on diffraction-limited spots is essential for many photonic applications and is particularly relevant for optical trapping; however, all currently used approaches fail to simultaneously provide flexible transportation of light ...
Malte Plidschun   +5 more
semanticscholar   +1 more source

A IR-Femtosecond Laser Hybrid Sensor to Measure the Thermal Expansion and Thermo-Optical Coefficient of Silica-Based FBG at High Temperatures

open access: yesSensors, 2018
In this paper, a hybrid sensor was fabricated using a IR-femtosecond laser to measure the thermal expansion and thermo-optical coefficient of silica-based fiber Bragg gratings (FBGs).
Litong Li   +4 more
doaj   +1 more source

Special Optical Fibres

open access: yesSPIE Proceedings, 1987
Optical fibres are making ever-increasing inroads into areas traditionally satisfied by older, more established technologies. In particular, sensors which rely on the external modulation of the properties of an optical fibre (intrinsic sensors) are receiving much attention since they can be made extremely sensitive and can be used for distributed ...
Poole, S.B., Payne, D.N.
openaire   +2 more sources

Range-resolved signal processing for fibre segment interferometry applied to dynamic long-gauge length strain sensing [PDF]

open access: yes, 2015
A range-resolved interferometric signal processing technique using sinusoidal optical frequency modulation is applied to fibre segment interferometry. Here, six optical fibre segments of gauge length 12.5 cm are used as interferometric strain sensors and
Charrett, Thomas O. H.   +4 more
core   +1 more source

Liquid-Crystal-Filled Side-hole Fiber for High-Sensitivity Temperature and Electric Field Measurement

open access: yesMicromachines, 2019
We propose a highly sensitive sensor based on a nematic liquid-crystal-filled side-hole fiber. The liquid crystal is precisely filled into an air hole of the optical fiber using a method of manually gluing in the fusion splicer.
Yijian Huang   +6 more
doaj   +1 more source

Optical fibre nanowire technology and applications [PDF]

open access: yes, 2008
A review of optical fibre nanowires and their applications is ...
Brambilla, G.
core   +1 more source

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