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Photonics
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Advances of Optical Fiber Sensors
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Advances of Optical Fiber Sensors

A special issue of Photonics (ISSN 2304-6732).

Deadline for manuscript submissions: closed (15 May 2023) | Viewed by 5801

Special Issue Editor

Dr. Xin Lu

E-Mail Website
Guest Editor
Bundesanstalt für Materialforschung und -prüfung, Unter den Eichen 44-46, 12203 Berlin, Germany
Interests: distributed fiber sensing; fiber optic sensors; nonlinear fiber optics; optical signal processing

Special Issue Information

Dear Colleagues,

Optical fiber sensors usually employ fibers as transmission and sensing medium, a large number of sensors can therefore be easily multiplexed due to the large bandwidth of the optical fiber, so that a fiber sensing system is able to collect and transmit an enormous amount of data in a short time. Such a feature makes the optical fiber sensor a promising candidate to alleviate our society’s thirst for data. The past few years have witnessed significant progress of the optical fiber sensors, e.g., the fiber is functionalized by new materials and the sensing performance is greatly improved by novel data processing methods. In addition, the fiber sensor has expanded its application area into Industry 4.0, smart city, Internet of Things, etc.

We are pleased to invite you to contribute to our Special Issue “Advances of Optical Fiber Sensors”. This issue is dedicated to the recent developments in the area of optical fiber sensing, ranging from theoretical analysis to experimental research, and from lab demonstration to field test and industrial application. In this Special Issue, original research articles and reviews are welcome. Research areas may include (but not limited to) the following:

  • Physical and mechanical sensors;
  • Chemical, environmental, biological sensors;
  • Pointwise interferometric sensors, like fiber Bragg grating and interferometers;
  • Distributed and multiplexed sensing techniques and networks;
  • Micro- and nano-structured fiber sensors;
  • Sensors-based on polymer optical fiber;
  • New structures and materials for optical fiber sensing;
  • New signal processing techniques for optical fiber sensors;
  • Industrial applications and field tests.

We look forward to receiving your contributions.

Dr. Xin Lu
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. Photonics is an international peer-reviewed open access monthly 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 2400 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.

Published Papers (3 papers)

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Research

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14 pages, 2625 KiB  
Article
Phase Error Evaluation via Differentiation and Cross-Multiplication Demodulation in Phase-Sensitive Optical Time-Domain Reflectometry
by Xin Lu and Peter James Thomas
Photonics 2023, 10(5), 514; https://doi.org/10.3390/photonics10050514 - 28 Apr 2023
Cited by 1 | Viewed by 1087
Abstract
Phase-sensitive optical time-domain reflectometry (φOTDR) is a technology for distributed vibration sensing, where vibration amplitudes are determined by recovering the phase of the backscattered light. Measurement noise induces phase errors, which degrades sensing performance. The phase errors, using a differentiation and [...] Read more.
Phase-sensitive optical time-domain reflectometry (φOTDR) is a technology for distributed vibration sensing, where vibration amplitudes are determined by recovering the phase of the backscattered light. Measurement noise induces phase errors, which degrades sensing performance. The phase errors, using a differentiation and cross-multiplication (DCM) algorithm, are investigated theoretically and experimentally in a φOTDR system based on a phase retrieval configuration consisting of an imbalanced Mach–Zehnder interferometer (IMZI) and a 3 × 3 coupler. Analysis shows that phase error is highly dependent on the AC component of the obtained signal, essentially being inversely proportional to the product of the power of the light backscattered from two locations. An analytical expression was derived to estimate the phase error and was confirmed by experiment. When applied to the same measurement data, the error is found to be slightly smaller than that obtained using in-phase/quadrature (I/Q) demodulation. The error, however, increases for longer measurement times. Full article
(This article belongs to the Special Issue Advances of Optical Fiber Sensors)
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9 pages, 3604 KiB  
Communication
Airborne Sound Sensing System Based on DAS and Ultra-Simple Transducer Structure
by Jianfang Tang, Minghao Hu, Gan Jiang, Xuanyu Zheng and Fei Peng
Photonics 2022, 9(12), 975; https://doi.org/10.3390/photonics9120975 - 12 Dec 2022
Cited by 1 | Viewed by 1394
Abstract
Fiber-distributed optical fiber acoustic sensor (DAS) is generally used in distributed long-distance acoustic/vibration measurement. Recently, DAS is also used in weak airborne sound detection. To improve the sensitivity of DAS, using a state-of-the-art acoustic transducer or a special enhanced scattering fiber, which are [...] Read more.
Fiber-distributed optical fiber acoustic sensor (DAS) is generally used in distributed long-distance acoustic/vibration measurement. Recently, DAS is also used in weak airborne sound detection. To improve the sensitivity of DAS, using a state-of-the-art acoustic transducer or a special enhanced scattering fiber, which are uncommon in the industrial site, is often essential, according to the previous research. In this work, the fading of DAS is suppressed by the multi-frequency probes and polarization-diversity-receiver scheme. The self-noise of DAS is further lowered by the phase averaging of multiple acoustic channels wound on the transducer. We found that, supported by this high-performance DAS, even if the transducer is made with an ultra-simple plastic structure in daily life, the system can achieve high-sensitivity airborne sound sensing. The proposed simple acoustic transducer can reach the sensitivity level of −106.5 dB re. 1 rad/μPa at a sensing range of 5.1 km, which can meet many demands on the industrial site. Full article
(This article belongs to the Special Issue Advances of Optical Fiber Sensors)
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Review

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33 pages, 7105 KiB  
Review
Optical Fiber Biosensors for Protein Detection: A Review
by Shuhan Lyu, Zheyu Wu, Xinghua Shi and Qian Wu
Photonics 2022, 9(12), 987; https://doi.org/10.3390/photonics9120987 - 15 Dec 2022
Cited by 7 | Viewed by 2967
Abstract
Proteins play an important role in organisms. The fast and high-accuracy detection of proteins is demanded in various fields, such as healthcare, food safty, and biosecurity, especially in the background of the globally raging severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Optical fiber [...] Read more.
Proteins play an important role in organisms. The fast and high-accuracy detection of proteins is demanded in various fields, such as healthcare, food safty, and biosecurity, especially in the background of the globally raging severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Optical fiber sensors have great potential for protein detection due to the excellent characteristics of high sensitivity, miniaturization, and capability for remote monitoring. Over the past decades, a large number of structures have been investigated and proposed. This paper begins with an overview of different fiber sensing structures for protein detection according to the fundamental sensing mechanisms. The overview is classified into four sections, including intensity-modulation, phase-modulation, scattering, and fluorescence. In each section, we reviewed the recent advances of fiber protein sensors and compared their performance, such as sensitivity and limit of detection. And then we analyzed the advantages and disadvantages of the four kinds of biosensors. Finally, the paper concludes with the challenges faced and possible future development of optical fiber protein biosensors for further study. Full article
(This article belongs to the Special Issue Advances of Optical Fiber Sensors)
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