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Optical Fiber Sensor Transducers Based on Hybrid and Structured Materials
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Optical Fiber Sensor Transducers Based on Hybrid and Structured Materials

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

Deadline for manuscript submissions: closed (20 September 2022) | Viewed by 7012

Special Issue Editors

Dr. Gabriela Statkiewicz-Barabach

E-Mail Website
Guest Editor
Department of Optics and Photonics, Wroclaw University of Science and Technology, Wybrzeze Wyspianskiego 27, 50-370 Wrocław, Poland
Interests: optical fiber sensors; fiber optic gratings; special optical fibers
Special Issues, Collections and Topics in MDPI journals
Dr. Pawel Marc

E-Mail Website
Guest Editor
Institute of Applied Physics, Military University of Technology, Gen. Sylwestra Kaliskiego 2, 00-908 Warsaw, Poland
Interests: polarization properties of optical materials (including polymers); optical fiber elements and subsystems; optical fiber sensors; polarimetric measurements and applications of optical elements; optoelectronic elements in quantum communication
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The most important part of any type of optical sensor is the transducer, which transforms a physical, chemical or biological measurand to the selected light parameter modulation. Usually, the enhancement of the sensor parameters requires the development of a novel transducer or the improvement of an existing one. This important step requires an advanced type of optical fiber or additional material. Therefore, we propose this Special Issue, entitled “Optical fiber sensors transducers based on hybrid and structured materials”, as an opportunity to focus on this particular part of the sensor. Hybrid materials applied for the transducer very often combine their organic–inorganic or organic–metal–inorganic properties when they are used, for example, in long period gratings, tapered or processed in different manners; a standard or specialty optical fiber based on inorganic glasses. Structured materials for optical fiber sensors are the transducers formed in optimized micro- or nanostructures, dual-, multi- or asymmetric core arrangements. Hybrid and structured materials applied to plastic optical fiber sensors are also included in this topic.

Dr. Gabriela Statkiewicz-Barabach
Dr. Pawel Marc
Guest Editors

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Keywords

  • optical fiber sensors
  • hybrid optical fiber materials
  • structured optical fiber materials
  • optical fiber transducer sensing properties

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Published Papers (3 papers)

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Research

13 pages, 2681 KiB  
Article
Three-Dimensional-Printed Mechanical Transmission Element with a Fiber Bragg Grating Sensor Embedded in a Replaceable Measuring Head
by Piotr Lesiak, Konrad Pogorzelec, Aleksandra Bochenek, Piotr Sobotka, Karolina Bednarska, Alicja Anuszkiewicz, Tomasz Osuch, Maksymilian Sienkiewicz, Piotr Marek, Michał Nawotka and Tomasz R. Woliński
Sensors 2022, 22(9), 3381; https://doi.org/10.3390/s22093381 - 28 Apr 2022
Cited by 5 | Viewed by 2026
Abstract
Compliant mechanisms have gained an increasing interest in recent years, especially in relation to the possibility of using 3D printers for their production. These mechanisms typically find applications in precise positioning systems of building robotic devices or in sensing where they can be [...] Read more.
Compliant mechanisms have gained an increasing interest in recent years, especially in relation to the possibility of using 3D printers for their production. These mechanisms typically find applications in precise positioning systems of building robotic devices or in sensing where they can be used to characterize displacement. Three-dimensional printing with PLA materials allows fiber optic-based sensors to be incorporated into the structures of properly designed compliant mechanisms. Therefore, in this paper, an innovative technology is described, of a Fiber Bragg Grating (FBG) sensor embedded in a measuring head which was then inserted into a specially designed mechanical transmission element. The shape of this element is based on clippers that allow to freely modify the amplification of displacement amplitude so that the FBG sensor always works in the most optimal regime without any need to modify its external dimensions. Flexural sensitivity of the replaceable measuring head equal to 1.26 (mε/mm) can be adapted to the needs of the flexure design. Full article
(This article belongs to the Special Issue Optical Fiber Sensor Transducers Based on Hybrid and Structured Materials)
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15 pages, 4473 KiB  
Article
Polymer Microtip on a Multimode Optical Fiber as a Threshold Volatile Organic Compounds Sensor
by Paweł Marć, Monika Żuchowska, Iwona Jakubowska and Leszek R. Jaroszewicz
Sensors 2022, 22(3), 1246; https://doi.org/10.3390/s22031246 - 7 Feb 2022
Cited by 10 | Viewed by 2227
Abstract
Polymer microtips are 3D microstructures manufactured on the end face of an optical fiber by using the photopolymerization process. Such micro-optic elements made on a multi-mode optical fiber were previously tested as a transducer of refractive index sensor. These studies were an inspiration [...] Read more.
Polymer microtips are 3D microstructures manufactured on the end face of an optical fiber by using the photopolymerization process. Such micro-optic elements made on a multi-mode optical fiber were previously tested as a transducer of refractive index sensor. These studies were an inspiration to investigate the possibility of using this type of transducer to measure the presence of volatile organic compounds in the air. The experimental results of microtips polymerized with UV and VIS were reported. It was possible to detect the presence of five different volatile compounds in the air due to the sensitivity of the transducer to the refractive indices changes. These changes were induced by the vapors condensed on the microtip surface. The measured time responses have shown that the return loss decreases rapidly as the microtip is inserted inside a glass vial filled with the tested compound. Moreover, correlations between calculated dynamic ranges and refractive indices and volumes of the volatile compounds inside the vials were negligible. Therefore, this type of sensor can be categorized as a condensed material threshold sensor. This sensor can be used in warning systems for monitoring leakages of pipelines carrying volatile chemicals. Full article
(This article belongs to the Special Issue Optical Fiber Sensor Transducers Based on Hybrid and Structured Materials)
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15 pages, 1341 KiB  
Article
Influence of Two-Plane Position and Stress on Intensity-Variation-Based Sensors: Towards Shape Sensing in Polymer Optical Fibers
by Vitorino Biazi, Letícia Avellar, Anselmo Frizera and Arnaldo Leal-Junior
Sensors 2021, 21(23), 7848; https://doi.org/10.3390/s21237848 - 25 Nov 2021
Cited by 4 | Viewed by 1877
Abstract
Shape reconstruction is growing as an important real-time monitoring strategy for applications that require rigorous control. Polymer optical fiber sensors (POF) have mechanical properties that allow the measurement of large curvatures, making them appropriate for shape sensing. They are also lightweight, compact and [...] Read more.
Shape reconstruction is growing as an important real-time monitoring strategy for applications that require rigorous control. Polymer optical fiber sensors (POF) have mechanical properties that allow the measurement of large curvatures, making them appropriate for shape sensing. They are also lightweight, compact and chemically stable, meaning they are easy to install and safer in risky environments. This paper presents a sensor system to detect angles in multiple planes using a POF-intensity-variation-based sensor and a procedure to detect the angular position in different planes. Simulations are performed to demonstrate the correlation between the sensor’s mechanical bending response and their optical response. Cyclic flexion experiments are performed at three test frequencies to obtain the sensitivities and the calibration curves of the sensor at different angular positions of the lateral section. A Fast Fourier Transform (FFT) analysis is tested as a method to estimate angular velocities using POF sensors. The experimental results show that the prototype had high repeatability since its sensitivity was similar using different test frequencies at the same lateral section position. The proposed approach proved itself feasible considering that all linear calibration curves presented a coefficient of determination (R2) higher than 0.9. Full article
(This article belongs to the Special Issue Optical Fiber Sensor Transducers Based on Hybrid and Structured Materials)
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