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Sensors Based on Optical Waveguide
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Sensors Based on Optical Waveguide

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

Deadline for manuscript submissions: closed (30 September 2021) | Viewed by 9789

Special Issue Editors

Dr. Romeo Bernini

E-Mail Website
Guest Editor
Institute for Electromagnetic Sensing of the Environment, 80124 Napoli, Italy
Interests: integrated optical sensors; optical fiber sensors; distributed fiber sensors; lab-on-chip; optical resonator; sensors for biomedical application
Special Issues, Collections and Topics in MDPI journals
Dr. Genni Testa

E-Mail Website
Guest Editor
Institute for Electromagnetic Sensing of the Environment, 80124 Napoli, Italy
Interests: integrated optical sensors; interferometric waveguide sensors; resonator waveguide sensors; sensors for biomedical application
Special Issues, Collections and Topics in MDPI journals
Dr. Gianluca Persichetti

E-Mail Website
Guest Editor
Institute for Electromagnetic Sensing of the Environment, 80124 Napoli, Italy
Interests: optical fiber sensors; optical waveguides for sensing applications; optical waveguides sensor fabrication techniques; optical lab-on-chip sensors; polymer optical fiber/waveguide sensors; specialty fibers for sensing applications
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Optical waveguides represent a key element that has a strong impact in the field of optical sensors. Consequently, sensors that have found multiple applications in recent years require continuous evolutions and innovative approaches in the development of this powerful tool. Both fiber and integrated optical waveguide-based sensors have demonstrated very high performances from the nanoscale to macroscale. In biosensing applications, an impressive limit of detection down to single molecule could be reached. On the other hand, distributed fiber sensors open the possibility of monitoring over ranges of hundreds of kilometers.

This Special Issue aims to cover advancements, developments, and applications over a wide range of topics in this area. We solicit research papers from state-of-the-art contributions to critical reviews. Topics of interest include but are not limited to:

  • Optical fiber sensors
  • Integrated planar waveguide-based sensors
  • Single mode, few mode, and multimode sensors
  • Optical waveguides for sensing applications
  • Specialty fibers for sensing application
  • Photonic crystal fiber sensors
  • Interferometric waveguide sensors
  • Resonator waveguide sensors
  • Optical waveguides sensor fabrication techniques
  • Fiber Bragg gratings (FBG)
  • Sensors for biomedical application
  • Optical lab-on-chip sensors
  • Optical fiber sensor multiplexing techniques
  • Distributed fiber sensors
  • Polymer optical fiber/waveguide sensors
  • Novel waveguides for sensing applications

Dr. Romeo Bernini
Dr. Genni Testa
Dr. Gianluca Persichetti
Guest Editors

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

  • Optical fibers
  • Integrated waveguides
  • Optical fiber sensors
  • Optical sensors
  • Distributed fiber sensors

Published Papers (4 papers)

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Research

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11 pages, 3309 KiB  
Article
Ultrahigh Sensitivity Mach−Zehnder Interferometer Sensor Based on a Weak One-Dimensional Field Confinement Silica Waveguide
by Chenming Zhao, Lei Xu and Liying Liu
Sensors 2021, 21(19), 6600; https://doi.org/10.3390/s21196600 - 02 Oct 2021
Cited by 7 | Viewed by 1911
Abstract
We report a novel Mach−Zehnder interferometer (MZI) sensor that utilizes a weak one-dimensional field confinement silica waveguide (WCSW). The WCSW has a large horizontal and vertical aspect ratio and low refractive index difference, which features easy preparation and a large evanescent field for [...] Read more.
We report a novel Mach−Zehnder interferometer (MZI) sensor that utilizes a weak one-dimensional field confinement silica waveguide (WCSW). The WCSW has a large horizontal and vertical aspect ratio and low refractive index difference, which features easy preparation and a large evanescent field for achieving high waveguide sensitivity. We experimentally achieved WCSW ultrahigh waveguide sensitivity of 0.94, MZI sensitivity of 44,364 π/RIU and a low limit of detection (LOD) of 6.1 × 10−7 RIU. Full article
(This article belongs to the Special Issue Sensors Based on Optical Waveguide)
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14 pages, 6675 KiB  
Communication
Design and Analysis of Broadband LiNbO3 Optical Waveguide Electric Field Sensor with Tapered Antenna
by Haiying Lu, Yingna Li and Jiahong Zhang
Sensors 2021, 21(11), 3672; https://doi.org/10.3390/s21113672 - 25 May 2021
Cited by 14 | Viewed by 2692
Abstract
The three-dimensional (3D) simulation model of a lithium niobate (LiNbO3, LN) optical waveguide (OWG) electric field sensor has been established by using the full-wave electromagnetic simulation software. The influences of the LN substrate and the packaging material on the resonance frequency [...] Read more.
The three-dimensional (3D) simulation model of a lithium niobate (LiNbO3, LN) optical waveguide (OWG) electric field sensor has been established by using the full-wave electromagnetic simulation software. The influences of the LN substrate and the packaging material on the resonance frequency of the integrated OWG electric field sensor have been simulated and analyzed. The simulation results show that the thickness of the LN substrate has a great influence on the resonant frequency of the sensor (≈33.4%). A sensor with a substrate thickness of 1 mm has been designed, fabricated, and experimentally investigated. Experimental results indicate that the measured resonance frequency is 7.5 GHz, which nearly coincides with the simulation results. Moreover, the sensor can be used for the measurement of the nanosecond electromagnetic impulse (NEMP) in the time domain from 1.29 kV/m to 100.97 kV/m. Full article
(This article belongs to the Special Issue Sensors Based on Optical Waveguide)
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10 pages, 2630 KiB  
Article
Design and Performance of a Composite Grating-Coupled Surface Plasmon Resonance Trace Liquid Concentration Sensor
by Wenchao Li, Zhiquan Li, Jiahuan He and Liyang Chu
Sensors 2019, 19(24), 5502; https://doi.org/10.3390/s19245502 - 12 Dec 2019
Cited by 4 | Viewed by 2357
Abstract
In this paper, a grating-coupled surface plasmon resonance concentration sensor employing a gold and indium tin oxide (Au/ITO) nanoparticle composite instead of metal is proposed. The structure and material parameters of the sensor are discussed and analyzed. Taking the ethylene glycol concentration as [...] Read more.
In this paper, a grating-coupled surface plasmon resonance concentration sensor employing a gold and indium tin oxide (Au/ITO) nanoparticle composite instead of metal is proposed. The structure and material parameters of the sensor are discussed and analyzed. Taking the ethylene glycol concentration as an example, the influence of the nanocomposite on the wave vector matching, the influence of the refractive index of the medium to be tested and the influence of the concentration on the refractive index were analyzed in detail. The experimental results show that when the sensor is used for the measurement of ethylene glycol concentration, the correlation coefficient between the concentration and the refractive index is as high as 0.999995. The fitting curve and data correlation are good, and the sensitivity has a good linear relationship with the sensitivity. Therefore, the sensor structure proposed in this paper can be used to accurately measure the trace concentration of liquid, and its sensing mode has certain reference value for the measurement of general trace fluid concentration. Full article
(This article belongs to the Special Issue Sensors Based on Optical Waveguide)
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Other

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10 pages, 3500 KiB  
Letter
A Nanostructure with Defect Based on Fano Resonance for Application on Refractive-Index and Temperature Sensing
by Xiaoyu Yang, Ertian Hua, Hao Su, Jing Guo and Shubin Yan
Sensors 2020, 20(15), 4125; https://doi.org/10.3390/s20154125 - 24 Jul 2020
Cited by 17 | Viewed by 1928
Abstract
Herein, a nanosensor structure is proposed, which comprises metal-insulator-metal (MIM) waveguide with stub and circular ring cavity with a stub (CRCS). The phenomenon of Fano resonance appears in the transmission spectrum, which is formed by interaction between the narrowband mode of CRCS and [...] Read more.
Herein, a nanosensor structure is proposed, which comprises metal-insulator-metal (MIM) waveguide with stub and circular ring cavity with a stub (CRCS). The phenomenon of Fano resonance appears in the transmission spectrum, which is formed by interaction between the narrowband mode of CRCS and broadband mode of stub on bus waveguide. The influence of geometric asymmetry on mode splitting of Fano resonance was discussed. The mode splitting of Fano resonance can vastly improve figure of merit (FOM) with a sight decrease of sensitivity. The best performance of the refractive-index nanosensor is attained, which is 1420 nm/RIU with a high FOM of 76.76. Additionally, the application of designed structure on temperature sensing was investigated, which has sensitivity of 0.8 nm/°C. The proposed structure also possesses potential applications on other on-chip nanosensors. Full article
(This article belongs to the Special Issue Sensors Based on Optical Waveguide)
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