scholarly journals Brillouin Scattering in Optical Fibers and Its Application to Distributed Sensors

10.5772/59145 ◽  
2015 ◽  
Author(s):  
Weiwen Zou ◽  
Xin Long ◽  
Jianping Chen
Keyword(s):  
Optical Fibers ◽  
Brillouin Scattering ◽  
Distributed Sensors

scholarly journals A Brief Review of Specialty Optical Fibers for Brillouin-Scattering-Based Distributed Sensors

2018 ◽  
Vol 8 (10) ◽  
pp. 1996 ◽  
Author(s):  
Peter Dragic ◽  
John Ballato
Keyword(s):  
Optical Fiber ◽  
Silicate Glass ◽  
Optical Fibers ◽  
Brillouin Scattering ◽  
Distributed Sensors ◽  
Distributed Sensor ◽  
Fiber Design ◽  
New Thinking ◽  
Sensing Application ◽  
Brillouin Gain

Specialty optical fibers employed in Brillouin-based distributed sensors are briefly reviewed. The optical and acoustic waveguide properties of silicate glass optical fiber first are examined with the goal of constructing a designer Brillouin gain spectrum. Next, materials and their effects on the relevant Brillouin scattering properties are discussed. Finally, optical fiber configurations are reviewed, with attention paid to fibers for discriminative or other enhanced sensing configurations. The goal of this brief review is to reinforce the importance of fiber design to distributed sensor systems, generally, and to inspire new thinking in the use of fibers for this sensing application.

Pipeline Geohazard Risk Monitoring With Optical Fiber Distributed Sensors: Experience With Andean and Arctic Routes

2018 ◽  
Author(s):  
Fabien Ravet ◽  
Fabien Briffod ◽  
Sanghoon Chin ◽  
Etienne Rochat ◽  
Jean-Grégoire Martinez
Keyword(s):  
Optical Fiber ◽  
Optical Fibers ◽  
Brillouin Scattering ◽  
Weather Conditions ◽  
Spatial Location ◽  
Deformation Monitoring ◽  
Distributed Sensors ◽  
The Andes ◽  
Risk Monitoring ◽  
Geohazard Risk

Many pipelines are built in regions affected by harsh environmental conditions where changes in soil texture between winter and summer increase the likelihood of hazards. Pipeline routes also cross mountains that are characterized by steep slopes and unstable soils as in the Andes and along the coastal range of Brazil. In other cases, these pipelines are laid in remote areas with significant seismic activity or exposure to permafrost. Depending on weather conditions and location, visual inspection is difficult or even impossible and therefore remote sensing solutions for pipes offer significant advantages over conventional inspection techniques. Optical fibers can help solve these challenges. Optical fiber based geotechnical and structural monitoring use distributed measurement of strain and temperature thanks to the sensitivity of Brillouin scattering to mechanical and thermal effects. The analysis of scattering combined with a time domain technique allows the measurement of strain and temperature profiles. Temperature measurement is carried out to monitor soil erosion or dune migration through event quantification and spatial location. Direct measurement of strain in the soil also improves the detection of environmental hazards. As an example, the technology can pinpoint the early signs of landslides. In some cases, actual pipe deformation must be monitored such as in the case of an active tectonic fault crossing. Pipe deformation monitoring operation is achieved by the measurement of distributed strain along fiber sensors attached to the structure. This paper comprehensively reviews over 15 years of continuous development of pipeline geohazard risk monitoring with optical fiber distributed sensors from technology qualification and validation to its implementation in real cases as well as its successful continuous operation. Case studies presented include pipeline monitoring in Arctic and Siberian environment as well as in the Andes which illustrate how the technology is used and demonstrate proof of early detection and location of geohazard events such as erosion, landslide, settlement and pipe deformation.

Stimulated Brillouin scattering in optical fibers

2009 ◽  
Vol 2 (1) ◽  
pp. 1 ◽  
Author(s):  
Andrey Kobyakov ◽  
Michael Sauer ◽  
Dipak Chowdhury
Keyword(s):  
Optical Fibers ◽  
Brillouin Scattering ◽  
Stimulated Brillouin Scattering ◽  
Stimulated Brillouin

Use of the Stimulated Brillouin Scattering Effect in Optical Fibers to Generate Microwave Signals

2021 ◽  
Author(s):  
J. R. Warnes-Lora ◽  
L. J. Quintero-Rodriguez ◽  
J. Rodriguez-Asomoza ◽  
Min Won Lee ◽  
A. Garcia-Juarez ◽  
...  
Keyword(s):  
Optical Fibers ◽  
Brillouin Scattering ◽  
Stimulated Brillouin Scattering ◽  
Scattering Effect ◽  
Microwave Signals ◽  
Stimulated Brillouin
Sign in / Sign up

Export Citation Format

Share Document