Results 101 to 110 of about 11,441 (205)

Neutron methods for the direct determination of the magnetic induction in thick films

, 2015
We review different neutron methods which allow extracting directly the value of the magnetic induction in thick films: Larmor precession, Zeeman spatial beam-splitting and neutron spin resonance.
Kozhevnikov, S. V., Ott, F., Radu, F.
core   +1 more source

Suppression of Modulation Instability Induced Phase Noise in the Long-Haul Phase-Sensitive Optical Time Domain Reflectometry. [PDF]

Sensors (Basel), 2022
Zhang Y, Zhu Q, Lu Y, Meng Z, Hu X.
europepmc   +1 more source

Identification of optical fibres in a passive optical network using highly temperature insensitive filters and reflectors

IET Optoelectronics
The authors demonstrate the use of highly temperature insensitive dense wavelength division multiplexing filters combined with optical reflectors and optical time domain reflectometry to uniquely identify specific optical fibres beyond the optical ...
Stephanie R. Bally, Ian E. Horsley, Sophie Minoughan, Alistair J. Poustie   +3 more
doaj   +1 more source

Performance Evaluation of PPP-BOTDA-Based Distributed Optical Fiber Sensors

International Journal of Distributed Sensor Networks, 2012
The basic sensing behaviors of Pulse-Prepump Brillouin Optical Time Domain Analysis- (PPP-BOTDA-) based distributed fiber optic sensors (DFOSs) with a spatial resolution on the order of 0.1 m are first experimentally studied.
Hao Zhang, Zhishen Wu
doaj   +1 more source

Comparative Experimental Study of a High-Temperature Raman-Based Distributed Optical Fiber Sensor with Different Special Fibers

Sensors, 2019
An experimental study of a high temperature distributed optical fiber sensor based on Raman Optical-Time-Domain-Reflectometry (ROTDR) (up to 450 °C) and optical fibers with different coatings (polyimide/carbon, copper, aluminum and gold) is ...
Ismail Laarossi, María Ángeles Quintela-Incera, José Miguel López-Higuera   +2 more
doaj   +1 more source

Subsurface multi-physical monitoring of urban development zone using a fiber optic nerve system

Journal of Rock Mechanics and Geotechnical Engineering
The rapid expansion of urban development has led to the extensive construction of civil infrastructures. However, these urban development zones frequently face potential geohazards, primarily due to the lack of detailed site investigations and long-term ...
Jing Wang, Donghui Wang, Hong-Hu Zhu, Ziqi Guo, Dumin Yan, Dao-Yuan Tan   +5 more
doaj   +1 more source

optical time domain reflectometry [PDF]

, 2011
openaire   +2 more sources

Design of an OFDR-based full-area intelligent and precise temperature measurement system for belt conveyors

Gong-kuang zidonghua
Rapid and precise measurement of temperature along the belt conveyor plays a core role in preventing external fire hazards in coal mines. Distributed optical fiber temperature measurement based on Optical Time-Domain Reflectometry (OTDR) is currently the
REN Baojiang, TANG Min, DU Feng, FU Jiaxing, GAO Guiheng, CUI Ming, WANG Zhihao   +6 more
doaj   +1 more source

Optical Multimode Time-Domain Reflectometry.

The Review of Laser Engineering, 1995
Yishu WANG, Tadayuki FUNABA, Tsutomu ICHIMURA, Naohiro TANNO   +3 more
openaire   +2 more sources

Time-expanded phase sensitive optical time-domain reflectometry

, 2023
Los sensores distribuidos de fibra óptica (DOFS por sus siglas en inglés) han resultado ser una herramienta muy útil, versátil y rentable en la monitorización de procesos que requieren una red de sensores con un elevado número de puntos de medida, típicamente superior al millar.
openaire   +1 more source