Results 131 to 140 of about 167 (163)

Distributed fiber optic sensors placement for infrastructure-as-a-sensor

Photonic Network Communications, 2022
Zilong Ye, Philip N. Ji, Ting Wang 0016
openaire   +1 more source

Ultraviolet Sensor Based on Conventional Distributed Fiber-Optic Strain Sensor

2019 24th OptoElectronics and Communications Conference (OECC) and 2019 International Conference on Photonics in Switching and Computing (PSC), 2019
A newly distributed UV light sensor based on a photo-mechanical polymer coated optical fiber and a conventional distributed fiber-optic strain sensor has been proposed.
Tae-Jung Ahn, Gyeong-Seo Seo, Ok-Rak Lim
openaire   +1 more source

Distributed optical fiber chemical sensor

1996
Techniques for distributed optical fiber chemical sensor development were investigated and a model system for pH measurement was developed and, as a result, discrete distribution signals were obtained. pH indicator fluorescein sodium was chosen for this work because of its well known properties and high fluorescent intensity.
Yang, Yatao, Wallace, Peter A., Campbell, Michael   +2 more
openaire   +1 more source

Optimized fiber in a distributed Brillouin fiber-optic sensor

Optical Engineering, 2008
A sensing fiber that has a gradually increasing Brillouin gain-coefficient g B /A eff along its length and that can keep the received Brillouin Stokes power constant in a Brillouin fiber-optic sensor is proposed. This method can be an additional way to further extend the sensing distance of the distributed Brillouin fiber-optic sensor.
openaire   +1 more source

Brillouin-based fiber-optic distributed temperature sensor with optical preamplification

Optics Letters, 2000
Optical preamplification has been used in a fiber-optic distributed temperature sensor based on spontaneous Brillouin scattering and the use of direct detection, resulting in improved signal-to-noise ratios. The fiber-based optical preamplifier system comprises a three-port circulator, an erbium-doped fiber amplifier with a small-signal gain of 27 dB ...
de Souza, K., Newson, Trevor
openaire   +3 more sources

Theory of fiber optic radiometry, emissivity of fibers, and distributed thermal sensors

Applied Optics, 1991
This paper formulates a general radiometric theory of multimode step index fibers, covering in particular the region of mid- and far IR fibers. The optical fiber is treated both as a passive waveguide, guiding the external radiation injected into it, as well as an active waveguide, generating internal thermal radiation which is guided to both fiber ...
A, Zur, A, Katzir
openaire   +2 more sources

Distributed fiber-optic intrusion sensor system

Journal of Lightwave Technology, 2005
A distributed sensor system for detecting and locating intruders based on the phase-sensitive optical-time-domain reflectometer (/spl phi/-OTDR) is described. The sensing element is a cabled single-mode telecommunications fiber buried along the monitored perimeter. Light pulses from a continuous-wave Er:fiber Fabry-Pe/spl acute/rot laser with a narrow (
J.C. Juarez, E.W. Maier, null Kyoo Nam Choi, H.F. Taylor   +3 more
openaire   +1 more source

Distributed Active Optical Fiber Sensor, for Bending Measurement

2011
A unique and very important feature of fiber-optic technology consists in its capability for long-range distributed sensing. The paper introduces a simple system based on a bendable large mode area (LMA) fiber, meant for a sensing accuracy of the microns order.
Ramona Galatus, Emil Voiculescu
openaire   +1 more source

Distributed Optical Fiber Sensors

2021
Juan Hernández-Cordero, Mathieu Hautefeuille   +1 more
openaire   +1 more source

DISTRIBUTED OPTICAL FIBER SENSORS

2009
R. BERNINI, MINARDO, Aldo, ZENI, Luigi
openaire   +5 more sources