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Bragg Grating Arrays for Sensing Applications
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Bragg Grating Arrays for Sensing Applications

A special issue of Sensors (ISSN 1424-8220). This special issue belongs to the section "Optical Sensors".

Deadline for manuscript submissions: closed (31 December 2020) | Viewed by 6833

Special Issue Editor

Prof. Dr. Bernhard Schmauss

E-Mail Website
Guest Editor
Friedrich-Alexander-Universität Erlangen-Nürnberg, Institute of Microwaves and Photonics, 91058 Erlangen, Germany
Interests: optical sensors; optical fiber sensors; optical transmission systems; medical applications of photonics; fiber lasers; sensor signal processing
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Bragg grating based optical sensors have attracted much interest, since they show enormous potential for applications in various fields. Thus, enormous effort has been put into the research and development of Bragg gratings. Especially, the fact that these sensors can be arranged as an array offers the opportunity to build multipoint sensor systems with high spacial resolution and sensitivity. The Special Issue on “Bragg Grating Arrays for Sensing Applications” addresses all research topics in the field, covering fiber gratings, planar gratings; polymer waveguide or silica glass-based structures; and the fabrication of arrays by phase mask, interferometric concepts, or direct writing setups. Draw tower fiber Bragg gratings are significant devices in this context too. Modern sensor systems always rely onthe suitable detection and signal processing of sensor signals. Multiplexed sensors require special read-out technologies and system concepts like wavelength division multiplexing, optical time, or frequency domain multiplexing. Numerous signal processing ideas have also been developed, like model-based compressed sensing or using machine learning algorithms. Finally, applications like structural health monitoring, environmental sensing, and industrial monitoring are of high interest.

Thus, I encourage all colleagues working in this field to submit their latest research results to this Special Issue on “Bragg Grating Arrays for Sensing Applications”.

Prof. Dr. Bernhard Schmauss
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Sensors is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Bragg grating arrays
  • Bragg grating fabrication
  • sensor multiplexing
  • sensor signal processing
  • distributed sensing

Published Papers (2 papers)

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16 pages, 4174 KiB  
Article
Fiber-Optic Based Smart Textiles for Real-Time Monitoring of Breathing Rate
by Aizhan Issatayeva, Aidana Beisenova, Daniele Tosi and Carlo Molardi
Sensors 2020, 20(12), 3408; https://doi.org/10.3390/s20123408 - 17 Jun 2020
Cited by 42 | Viewed by 4540
Abstract
Wearable light textiles are gaining widespread interest in application for measurement and monitoring of biophysical parameters. Fiber optic sensors, in particular Bragg Grating (FBG) sensors, can be a competitive method for monitoring of respiratory behavior for chest and abdomen regions since the sensors [...] Read more.
Wearable light textiles are gaining widespread interest in application for measurement and monitoring of biophysical parameters. Fiber optic sensors, in particular Bragg Grating (FBG) sensors, can be a competitive method for monitoring of respiratory behavior for chest and abdomen regions since the sensors are able to convert physical movement into wavelength shift. This study aims to show the performance of elastic belts with integrated optical fibers during the breathing activities done by two volunteers. Additionally, the work aims to determine how the positions of the volunteers affect the breathing pattern detected by optical fibers. As a reference, commercial mobile application for sensing vibration is used. The obtained results show that the FBGs are able to detect chest and abdomen movements during breathing and consequently reconstruct the breathing pattern. The accuracy of the results varies for two volunteers but remains consistent. Full article
(This article belongs to the Special Issue Bragg Grating Arrays for Sensing Applications)
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8 pages, 931 KiB  
Letter
Numerical Simulation of Optical Sensing by the Far Field Pattern Radiated by Periodic Grating Strips Over Silica Buffer on the Silicon Wire Waveguide
by Andrei Tsarev and Vittorio M. N. Passaro
Sensors 2020, 20(18), 5306; https://doi.org/10.3390/s20185306 - 16 Sep 2020
Cited by 1 | Viewed by 1981
Abstract
This paper presents results of numerical modeling of a modified design of an optical sensor based on segmented periodic silicon oxynitride (SiON) grating evanescently coupled with silicon wire. This segmented grating works as a leaky waveguide, which filters input power from a broadband [...] Read more.
This paper presents results of numerical modeling of a modified design of an optical sensor based on segmented periodic silicon oxynitride (SiON) grating evanescently coupled with silicon wire. This segmented grating works as a leaky waveguide, which filters input power from a broadband optical source and radiates it as an outcoming optical beam with both a small wavelength band and a small beam divergence. The radiation angle strongly depends on the refractive index of the grating environment and provides sensor interrogation by measuring the far field pattern in the focal plane of the lens, which is placed near the sensor element. The device concept was verified by direct numerical modeling through the finite difference time domain (FDTD) method and provided moderate intrinsic limit of detection (iLOD) ~ 0.004 RIU with a possible iLOD ~ 0.001 RIU for 10 mm-long structures. Full article
(This article belongs to the Special Issue Bragg Grating Arrays for Sensing Applications)
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