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Photonics Based Sensing and Detection

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

Deadline for manuscript submissions: closed (30 June 2023) | Viewed by 5235

Special Issue Editors

State Key Laboratory of Advanced Optical Communication Systems and Networks, Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
Interests: photonics device design and characterization
Special Issues, Collections and Topics in MDPI journals
State Key Laboratory of Advanced Optical Communication Systems and Networks, Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
Interests: photonic signal processing; microwave photonics

Special Issue Information

Dear Colleagues,

Sensing and detection is an ever-growing research area that is relevant in a large number of important applicative fields, including medical diagnostics, environmental monitoring, traffic and automotive industries, food safety, national defense, space flight and aviation. Photonic technology has been widely used for sensing and detection during the last decade. By utilizing different characteristics of the photon, including the amplitude, phase, time, frequency, space, and so on, signals can be detected and processed in multiple dimensions, which also changes the method and performance of signal processing in sensing and detection.

This Special Issue will explore enabling technologies for optical sensing and optical detection. Signal processing theories related to optics, optoelectronic integration, photonic devices, subsystems/systems, techniques as well as future perspectives are all within the scope.

Prof. Dr. Kan Wu
Prof. Dr. Xing Li 
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 sensors and applications
  • lidar and beam steering / receiving techniques
  • optoelectronic techniques for signal generation, transmission, reception, processing, and measurements
  • optical computing, AI, neural networking and neuromorphic devices
  • ultrafast optics and nonlinear optics
  • microwave photonics
  • optical processing for 3D/AR/VR

Published Papers (3 papers)

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Research

16 pages, 622 KiB  
Article
Properties of Gd-Doped Sol-Gel Silica Glass Radioluminescence under Electron Beams
by Daniel Söderström, Oskari Timonen, Heikki Kettunen, Risto Kronholm, Hicham El Hamzaoui, Bruno Capoen, Youcef Ouerdane, Adriana Morana, Arto Javanainen, Géraud Bouwmans, Mohamed Bouazaoui and Sylvain Girard
Sensors 2022, 22(23), 9248; https://doi.org/10.3390/s22239248 - 28 Nov 2022
Viewed by 1381
Abstract
The radiation-induced emission (RIE) of Gd3+-doped sol–gel silica glass has been shown to have suitable properties for use in the dosimetry of beams of ionizing radiation in applications such as radiotherapy. Linear electron accelerators are commonly used as clinical radiotherapy beams, [...] Read more.
The radiation-induced emission (RIE) of Gd3+-doped sol–gel silica glass has been shown to have suitable properties for use in the dosimetry of beams of ionizing radiation in applications such as radiotherapy. Linear electron accelerators are commonly used as clinical radiotherapy beams, and in this paper, the RIE properties were investigated under electron irradiation. A monochromator setup was used to investigate the light properties in selected narrow wavelength regions, and a spectrometer setup was used to measure the optical emission spectra in various test configurations. The RIE output as a function of depth in acrylic was measured and compared with a reference dosimeter system for various electron energies, since the dose–depth measuring abilities of dosimeters in radiotherapy is of key interest. The intensity of the main radiation-induced luminescence (RIL) of the Gd3+-ions at 314 nm was found to well represent the dose as a function of depth, and was possible to separate from the Cherenkov light that was also induced in the measurement setup. After an initial suppression of the luminescence following the electron bunch, which is ascribed to a transient radiation-induced attenuation from self-trapped excitons (STEX), the 314 nm component was found to have a decay time of approximately 1.3 ms. An additional luminescence was also observed in the region 400 nm to 600 nm originating from the decay of the STEX centers, likely exhibiting an increasing luminescence with a dose history in the tested sample. Full article
(This article belongs to the Special Issue Photonics Based Sensing and Detection)
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9 pages, 2978 KiB  
Communication
Hermetic Welding of an Optical Fiber Fabry–Pérot Cavity for a Diaphragm-Based Pressure Sensor Using CO2 Laser
by Hui Zhang, Yi Li, Zhuo Zhang, Chaoming Yang, Mingshan Liang, Yong Hu, Heming Wei and Fufei Pang
Sensors 2022, 22(13), 4700; https://doi.org/10.3390/s22134700 - 22 Jun 2022
Cited by 2 | Viewed by 1207
Abstract
A diaphragm-based hermetic optical fiber Fabry–Pérot (FP) cavity is proposed and demonstrated for pressure sensing. The FP cavity is hermetically sealed using one-step CO2 laser welding with a cavity length from 30 to 100 μm. A thin diaphragm is formed by polishing [...] Read more.
A diaphragm-based hermetic optical fiber Fabry–Pérot (FP) cavity is proposed and demonstrated for pressure sensing. The FP cavity is hermetically sealed using one-step CO2 laser welding with a cavity length from 30 to 100 μm. A thin diaphragm is formed by polishing the hermetic FP cavity for pressure sensing. The fabricated FP cavity has a fringe contrast larger than 15 dB. The experimental results show that the fabricated device has a linear response to the change in pressure, with a sensitivity of −2.02 nm/MPa in the range of 0 to 4 MPa. The results demonstrate that the proposed fabrication technique can be used for fabricating optical fiber microcavities for sensing applications. Full article
(This article belongs to the Special Issue Photonics Based Sensing and Detection)
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18 pages, 1105 KiB  
Article
LED PEDD Discharge Photometry: Effects of Software Driven Measurements for Sensing Applications
by Cormac D. Fay and Andrew Nattestad
Sensors 2022, 22(4), 1526; https://doi.org/10.3390/s22041526 - 16 Feb 2022
Cited by 8 | Viewed by 1771
Abstract
This work explores the effects of embedded software-driven measurements on a sensory target when using a LED as a photodetector. Water turbidity is used as the sensory target in this study to explore these effects using a practical and important water quality parameter. [...] Read more.
This work explores the effects of embedded software-driven measurements on a sensory target when using a LED as a photodetector. Water turbidity is used as the sensory target in this study to explore these effects using a practical and important water quality parameter. Impacts on turbidity measurements are examined by adopting the Paired Emitter Detector Diode (PEDD) capacitive discharge technique and comparing common embedded software/firmware implementations. The findings show that the chosen software method can (a) affect the detection performance by up to 67%, (b) result in a variable sampling frequency/period, and (c) lead to an disagreement of the photo capacitance by up to 23%. Optimized code is offered to correct for these issues and its effectiveness is shown through comparative analyses, with the disagreement reduced significantly from 23% to 0.18%. Overall, this work demonstrates that the embedded software is a key and critical factor for PEDD capacitive discharge measurements and must be considered carefully for future measurements in sensor related studies. Full article
(This article belongs to the Special Issue Photonics Based Sensing and Detection)
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