Recent Progress in Distributed Fiber Optic Sensors

By Xiaoyi Bao, Liang Chen. Italian National Conference on Sensors, 2012

1,223 citations recorded by the source corpus.

Rayleigh, Brillouin and Raman scatterings in fibers result from the interaction of photons with local material characteristic features like density, temperature and strain. For example an acoustic/mechanical wave generates a dynamic density variation; such a variation may be affected by local temperature, strain, vibration and birefringence. By detecting changes in the amplitude, frequency and phase of light scattered along a fiber, one can realize a distributed fiber sensor for measuring localized temperature, strain, vibration and birefringence over lengths ranging from meters to one hundred kilometers. Such a measurement can be made in the time domain or frequency domain to resolve location information. With coherent detection of the scattered light one can observe changes in birefringence and beat length for fibers and devices. The progress on state of the art technology for sensing performance, in terms of spatial resolution and limitations on sensing length is reviewed. These distributed sensors can be used for disaster prevention in the civil structural monitoring of pipelines, bridges, dams and railroads. A sensor with centimeter spatial resolution and high precision measurement of temperature, strain, vibration and birefringence can find applications in aerospace smart structures, material processing, and the characterization of optical materials and devices.

Subfields: Atomic and Molecular Physics, and Optics, Electrical and Electronic Engineering

View Paper: https://www.semanticscholar.org/paper/4152ad5801b4fcd6eb5737a3fa09068f855edf88

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In Atomic and Molecular Physics, and Optics

In Electrical and Electronic Engineering

Citations in the corpus

Recent Advances in Pipeline Monitoring and Oil Leakage Detection Technologies: Principles and Approaches (2019, background): “scattering without frequency variations) where the scattered power is directly proportional to the incident power which makes it attributable to non-propagation density fluctuations [67].”
Distributed Optical Fiber Sensing Based on Rayleigh Scattering (2013, background): “1874-3285/13 2013 Bentham Open Keywords: Optical fiber sensor, distributed sensors, Rayleigh scattering, polarization.”
Phase-sensitive Optical Time Domain Reflectometer Assisted by First-order Raman Amplification for Distributed Vibration Sensing Over >100 km (2014, background): “Distributed sensors present clear advantages over conventional point sensors when the number of points to be monitored is large, due to their low cost per monitored point [1].”
A Review of Distributed Optical Fiber Sensors for Civil Engineering Applications (2016, methodology): “In order to improve the inspection accuracy and efficiency, optical fiber sensors (OFS) are one of the fastest growing and most promising researched areas, due to their features of durability, stability, small size and insensitivity to external electromagnetic perturbations, which makes them ideal f”
The Role of Advanced Sensing in Smart Cities (2012, methodology): “Recent approaches for SHM include using sophisticated fiber optic sensors [65].”
Fibre Optic Sensors for Structural Health Monitoring of Aircraft Composite Structures: Recent Advances and Applications (2015, methodology): “A more detailed description of the various scattering mechanisms can be found in [8].”
Dielectric-Grating-Coupled Surface Plasmon Resonance From the Back Side of the Metal Film for Ultrasensitive Sensing (2016, background): “In recent years, fiber optical sensor technology has been developed for sensing of vibration [7], strain [8], gas [9], [10], and bio-molecules [11].”