Results 21 to 30 of about 162,455 (354)

Analysis of the applicability of singlemode optical fibers for measurement of deformation with distributed systems BOTDR [PDF]

open access: yes, 2016
Distributed optical fiber sensors allow monitoring physical effects across the whole cable. The paper presents results obtained from the performed tests and shows that single mode fibers can provide analyses of the deformation changes, when distributed ...
Bednárek, Lukáš   +4 more
core   +2 more sources

Fiber optic sensors [PDF]

open access: yesThe Journal of the Acoustical Society of America, 1984
Over the past several years, many groups have been carrying out research in the area of fiber optic sensor technology, and many types of fiber sensors have been developed. Two of the most promising fiber optic sensor types will be discussed in this talk: phase-modulated single mode interferometric sensors and intensity modulated multimode fiber sensors.
N. Lagakos   +4 more
openaire   +1 more source

Strain Transfer Function of Distributed Optical Fiber Sensors and Back-Calculation of the Base Strain Field

open access: yesSensors, 2021
Distributed optical fiber sensors are a promising technology for monitoring the structural health of large-scale structures. The fiber sensors are usually coated with nonfragile materials to protect the sensor and are bonded onto the structure using ...
Sangyoung Yoon   +3 more
doaj   +1 more source

Refractive Index Measurement of Lithium Ion Battery Electrolyte with Etched Surface Cladding Waveguide Bragg Gratings and Cell Electrode State Monitoring by Optical Strain Sensors

open access: yesBatteries, 2019
In this scientific publication, a new sensor approach for status monitoring, such as state of charge and state of health, of lithium ion batteries by using special Bragg gratings inscribed into standard optical glass fibers is presented.
Antonio Nedjalkov   +6 more
doaj   +1 more source

Modified POF Sensor for Gaseous Hydrogen Fluoride Monitoring in the Presence of Ionizing Radiations [PDF]

open access: yes, 2012
This paper describes the development of a sensor designed to detect low concentrations of hydrogen fluoride (HF) in gas mixtures. The sensor employs a plastic optical fiber (POF) covered with a thin layer of glass- like material. HF attacks the glass and
Benussi, L.   +6 more
core   +1 more source

Fusion of Multiple Pyroelectric Characteristics for Human Body Identification

open access: yesAlgorithms, 2014
Due to instability and poor identification ability of single pyroelectric infrared (PIR) detector for human target identification, this paper proposes a new approach to fuse the information collected from multiple PIR sensors for human identification ...
Wanchun Zhou   +4 more
doaj   +1 more source

An All-Solid Dispersion-Compensating Photonic Crystal Fiber Based on Mode Coupling Mechanism in Dual-Concentric Core

open access: yesInternational Journal of Optics, 2020
An all-solid dispersion-compensating photonic crystal fiber based on mode coupling mechanism in dual-concentric core has been proposed. The mode coupling characteristics, dispersion, confinement loss of the fiber, and the influence on dispersion of some ...
Zhaolun Liu, Chunlan Zhang, Yuwei Qu
doaj   +1 more source

Optical Fiber Probe Microcantilever Sensor Based on Fabry–Perot Interferometer

open access: yesSensors, 2022
Optical fiber Fabry–Perot sensors have long been the focus of researchers in sensing applications because of their unique advantages, including highly effective, simple light path, low cost, compact size, and easy fabrication.
Yongzhang Chen   +7 more
doaj   +1 more source

Metrology Camera System of Prime Focus Spectrograph for Subaru Telescope [PDF]

open access: yes, 2014
The Prime Focus Spectrograph (PFS) is a new optical/near-infrared multi-fiber spectrograph designed for the prime focus of the 8.2m Subaru telescope.
Chang, Yin-Chang   +16 more
core   +3 more sources

Polymer Waveguide Sensor Based on Evanescent Bragg Grating for Lab-on-a-Chip Applications

open access: yesSensors
In this work, an evanescent Bragg grating sensor inscribed in a few-mode planar polymer waveguide was integrated into microchannel structures and characterized by various chemical applications.
Zhenyu Zhang   +4 more
doaj   +1 more source

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