Application of Optical Fibre for Sensing

CUADRADO LABORDE, CHRISTIAN

INTECH

Lugar: Londres; Año: 2019 p. 301

978-1-78985-352-0

I have been involved in the research field of fiber optics for more than 15 years, by working in all fiber lasers, all-optical signal processing, etc. Therefore, and considering that the field of optical fibers is within my research area of expertise, I accepted the very kind invitation of IntechOpen editorial house to edit a book in this special field. Today, it is a great honor and pleasure for me to introduce this new book: Applications of Optical Fibers for Sensing. This is my third collaboration as book editor with IntechOpen, after the successful experiences of: Applications of Digital Signal Processing (2011) and Current Trends in Short- and Long-Period Fiber Gratings (2012). I truly hope that this new book will also be successfully received by the worldwide scientific community. In this book the reader will find a collection of chapters written by different experts around the world, covering the broad field of sensing of different parameters through optical fibers. The main goal of this book is to give an updated overview of the current research trends in this rapidly evolving field. First, in chapter 2, J. H. Osório and C. M. B. Cordeiro from Brazil ?Minimalist approach for the design of microstructured optical fiber sensors? report on the utilization of capillary-like fibers of different kinds as platforms for the realization of sensing measurements. These authors show that external stimuli can alter fiber wall thickness and/or induce birefringence variations, which in turn allows its use as pressure sensor, temperature sensor, or refractive index sensor. Next, in chapter 3, M. F. Domingues et al. from Portugal and Spain ?Fiber Bragg gratings as e-Health enablers: an overview for gait analysis applications?, report on the use of fiber Bragg gratings for gait analysis monitoring; i.e. the monitoring of plantar pressure, angle and torsion; with the purpose to a future integration in rehabilitation exoskeletons and for prosthetic control.In chapter 4, S. Kher and M. K. Saxena from India, ?Distributed, advanced fiber optic sensors? report several optical fiber sensing techniques such as Raman scattering and fiber Bragg gratings, to be applied especially in the context of nuclear plants monitoring. Whereas in chapter 5, D. Lo Presti et al. from Italy ?Real-time particle radiography by means of scintillating fibers tracker and residual range detectors,? reports in detail the construction and characterization of a charged particle imaging system by using scintillating optical fibers. In chapter 6, F. McGuinness et al. from Ireland, ?Review of liquid-filled optical fibre based temperature sensing,? review the current state-of-the-art in liquid filled optical fibre temperature sensing, with the focus on high resolution temperature sensing. Whereas in Chapter 7, R. Y.-N. Wong et al. from Singapore and the United Kingdom, ?Optical fibre long period grating sensors operating at and around the phase matching turning point,? reports the behavior and potential uses for fiber optic sensing of a very special type of very sensitive long-period fiber grating: those working at (and around) the phase matching turning point. Finally, in chapter 8, M. Delgado-Pinar et al. from Spain, ?Whispering gallery modes for accurate characterization of optical fibers? parameters,? review the use of a special technique to measure temperature profiles along conventional and special fibers (such as photosensitive or doped fibers), elasto-optic coefficients, and ultraviolet induced absorption loss coefficients of different photosensitive fibers. This technique relies in the use of whispering gallery modes, which are resonant in optical wavelength, being their spectral position a function of the radius and the refractive index of the micro-resonator material (eventually the optical fiber itself). Due to the high quality factor of these resonances, they allow measuring different parameters with high sensitivities and very low detection limits.I would like to thank all the authors for their contributions since their support has been crucial for the fulfillment of this project. In addition, I would like to thank the IntechOpen editorial staff for the confidence placed in me to edit this book, and especially to the IntechOpen`s author services manager Sara Debeuc for her support during the whole process. On behalf of me and the authors, we hope readers enjoy this book and benefit of its content, which provides a thorough understanding of several fields related to this exciting discipline.19th of December 2018Dr. Christian Cuadrado-Laborde (Editor)Temporary address: Applied Physics Department of the Valencia University of SpainChristian.Cuadrado@uv.esDedicated to my beloved son Éric Ariel