Linking Distributed and Integrated Fiber-Optic Sensing
Fecha
2022Language
en
Materia
Resumen
Distributed Acoustic Sensing (DAS) has become a popular method of observing seismic wavefields: backscattered pulses of light reveal strains or strain rates at any location along a fiber-optic cable. In contrast, a few newer systems transmit light through a cable and collect integrated phase delays over the entire cable, such as the Microwave Frequency Fiber Interferometer (MFFI). These integrated systems can be deployed over significantly longer distances, may be used in conjunction with live telecommunications, and can be significantly cheaper. However, they provide only a single time series representing strain over the entire length of the fiber. This work discusses theoretically how a distributed and integrated system can be quantitatively compared, and we note that the sensitivity depends strongly on points of curvature. Importantly, this work presents the first results of a quantitative, head-to-head comparison of a DAS and the integrated MFFI system using pre-existing telecommunications fibers in Athens, Greece. © 2022 The Authors.
Colecciones
Ítems relacionados
Mostrando ítems relacionados por Título, autor o materia.
-
Enhancement of bending strength properties of two wood species reinforced with two types of carbon fibre fabrics and two layouts
Karastergiou S., Foti D., Filippou V., Papadopoulos A. (2020)This work examined the enhancement of bending strength properties of two wood species, namely fir and pine, reinforced with two carbon fibre fabrics (CFF) of different areal weight, in two different layouts. CFF applied ... -
Effectiveness of different confining configurations of FRP jackets for concrete columns
Moretti M.L. (2019)This paper presents the results of an experimental investigation on the compressive strength of small scale concentrically axially loaded fiber-reinforced polymer (FRP) confined plain concrete columns, with cylinder concrete ... -
Theory of phase transmission fibre-optic deformation sensing
Fichtner A., Bogris A., Nikas T., Bowden D., Lentas K., Melis N.S., Simos C., Simos I., Smolinski K. (2022)We present a theory and conceptual examples for fibre-optic deformation sensing based on phase changes of transmitted light. As a first result, we establish an exact relation between observable phase changes and the ...