Layer-by-Layer Nano-assembly: A Powerful Tool for Optical Fiber Sensing Applications

The ability to tune the composition of nanostructured thin films is a hot topic for the design of functional coatings with advanced properties for sensing applications. The control of the structure at the nanoscale level enables an improvement of intrinsic properties (optical, chemical or physical) in comparison with the traditional bulk materials. In this sense, among all the known nanofabrication techniques, the layer-by-layer (LbL) nano-assembly method is a flexible, easily-scalable and versatile approach which makes possible precise control of the coating thickness, composition and structure. The development of sensitive nanocoatings has shown an exceptional growth in optical fiber sensing applications due to their self-assembling ability with oppositely charged components in order to obtain a multilayer structure. This nanoassembly technique is a powerful tool for the incorporation of a wide variety of species (polyelectrolytes, metal/metal oxide nanoparticles, hybrid particles, luminescent materials, dyes or biomolecules) in the resultant multilayer structure for the design of high-performance optical fiber sensors. In this work we present a review of applications related to optical fiber sensors based on advanced LbL coatings in two related research areas of great interest for the scientific community, namely chemical sensing (pH, gases and volatile organic compounds detection) as well as biological/biochemical sensing (proteins, immunoglobulins, antibodies or DNA detection).

Download Full-text

Optical-Fiber Sensors: An Overview

MRS Bulletin ◽

10.1557/mrs2002.121 ◽

2002 ◽

Vol 27 (5) ◽

pp. 365-369 ◽

Cited By ~ 5

Author(s):

D. J. Webb

Keyword(s):

Optical Fiber ◽

Optical Fibers ◽

Material Characterization ◽

Chemical Sensing ◽

Optical Fiber Sensors ◽

Bragg Grating ◽

Fiber Sensors ◽

Fiber Sensing ◽

Recent Developments ◽

Optical Fiber Sensing

AbstractThis article provides an overview of the field of optical-fiber sensing, including a brief introduction to the properties of optical fibers that make them suitable for material characterization and monitoring. Some of the recent developments in the field are described, with an emphasis on Bragg grating sensors, multiplexed systems, and chemical sensing, as well as the new field of microstructured fiber.

Download Full-text

Structural Health Monitoring of Civil Infrastructure Using Optical Fiber Sensing Technology: A Comprehensive Review

The Scientific World JOURNAL ◽

10.1155/2014/652329 ◽

2014 ◽

Vol 2014 ◽

pp. 1-11 ◽

Cited By ~ 98

Author(s):

X. W. Ye ◽

Y. H. Su ◽

J. P. Han

Keyword(s):

Structural Health Monitoring ◽

Optical Fiber ◽

Health Monitoring ◽

Optical Fiber Sensors ◽

Civil Infrastructure ◽

Fiber Sensors ◽

Structural Health ◽

Fiber Sensing ◽

Sensing Technology ◽

Optical Fiber Sensing

In the last two decades, a significant number of innovative sensing systems based on optical fiber sensors have been exploited in the engineering community due to their inherent distinctive advantages such as small size, light weight, immunity to electromagnetic interference (EMI) and corrosion, and embedding capability. A lot of optical fiber sensor-based monitoring systems have been developed for continuous measurement and real-time assessment of diversified engineering structures such as bridges, buildings, tunnels, pipelines, wind turbines, railway infrastructure, and geotechnical structures. The purpose of this review article is devoted to presenting a summary of the basic principles of various optical fiber sensors, innovation in sensing and computational methodologies, development of novel optical fiber sensors, and the practical application status of the optical fiber sensing technology in structural health monitoring (SHM) of civil infrastructure.

Download Full-text

Application of Distributed Optical Fiber Sensing Technology in the Anomaly Detection of Shaft Lining in Grouting

Journal of Sensors ◽

10.1155/2015/678634 ◽

2015 ◽

Vol 2015 ◽

pp. 1-8

Author(s):

Chunde Piao ◽

Jun Yuan ◽

Bin Shi ◽

Haijun Lu ◽

Guangqing Wei ◽

...

Keyword(s):

Anomaly Detection ◽

Optical Fiber ◽

Optical Fiber Sensors ◽

Fiber Sensors ◽

Time Deformation ◽

Fiber Sensing ◽

Sensing Technology ◽

Optical Fiber Sensing ◽

Shaft Lining ◽

Distributed Optical Fiber

The rupture of the shaft lining caused by grouting has seriously undermined the safety in coal mining. Based on BOTDR distributed optical fiber sensing technology, this paper studied the layout method of optical fiber sensors and the anomaly detection method of the deformation and obtained the evolution law of shaft deformation triggered by grouting. The research results showed that the bonding problem of optical fiber sensors in damp environment could be effectively solved, by applying the binder consisting of sodium silicate and cement. Through BOTDR-based deformation detection, the real-time deformation of the shaft lining caused by grouting was immediately spotted. By comparing the respective strain of shaft lining deformation and concrete deformation, the risk range of shaft lining grouting was identified. With the additional strain increment of the shaft lining triggered by each process of grouting, the saturated condition of grouting volume in strata was analyzed, providing an important technical insight into the field construction and the safety of the shaft lining.

Download Full-text

Optical fiber sensors based on nanostructured coatings fabricated by means of the layer-by-layer electrostatic self-assembly method

10.1117/12.738351 ◽

2007 ◽

Cited By ~ 1

Author(s):

Francisco J. Arregui ◽

Ignacio R. Matías ◽

Richard O. Claus

Keyword(s):

Optical Fiber ◽

Self Assembly ◽

Optical Fiber Sensors ◽

Nanostructured Coatings ◽

Layer By Layer ◽

Fiber Sensors ◽

Assembly Method

Download Full-text

Structure optimization of gold-sputtered side-polished U-shaped plastic optical fiber SPR sensor

Sensor Review ◽

10.1108/sr-12-2020-0281 ◽

2021 ◽

Vol ahead-of-print (ahead-of-print) ◽

Author(s):

Jianxing Jian Gu ◽

Chen Yu ◽

ZhenZe Yang ◽

Peng Xue ◽

Ning Jing ◽

...

Keyword(s):

Optical Fiber ◽

Conflicts Of Interest ◽

Spectral Response ◽

Plastic Optical Fiber ◽

Fiber Sensors ◽

Content Type ◽

Sensor Optimization ◽

Fiber Sensing ◽

Optical Fiber Sensing ◽

Practical Implications

Purpose This study aims to optimize the structure of gold-sputtered U-shaped plastic fiber sensors. Design/methodology/approach A group of U-shaped Au-sputtered plastic optical fiber sensing probes with polishing angles of 45°, 90° and 135° is prepared. Findings The experimental results show that the spectral response and sensitivity of the sensor at 45°polishing angle is twice that of the sensor at 90°. Research limitations/implications Due to the limitations of laboratory temperature and equipment, the overall effect has not reached the ideal, but the expected effect has been obvious. Experiments also optimize the sensor. Practical implications Optical fiber sensing has always been an indispensable part of various fields. Social implications Sensor optimization is of great help to the progress of technology and the development of science and technology. Originality/value The authors have no conflicts of interest to disclose.

Download Full-text