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Advances in Optical Fiber Sensors and Fiber Lasers
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Advances in Optical Fiber Sensors and Fiber Lasers

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

Deadline for manuscript submissions: 31 December 2025 | Viewed by 6251

Special Issue Editor

Dr. Ping Lu

E-Mail Website
Guest Editor
National Research Council Canada, 100 Sussex Drive, Ottawa, ON K1A 0R6, Canada
Interests: optics and photonics; optics and lasers; optoelectronics; applied optics; optical fibers; optical sensing; femtosecond lasers; fiber optic technology; fiber optic communication; diffraction
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Over the past fifty years, optical fibers have been intensively investigated and widely used in various applications due to their unique features, such as super miniature size, EMI immunity, harsh environment survival ability, and multiplexing capability, etc. The present Special Issue addresses the innovative design, fabrication, and application of optical fibers in sensors and fiber lasers. Furthermore, the current Special Issue invites the submission of research that addresses and investigates the presentation of new fiber sensors and fiber lasers for academic and industrial applications, such as for harsh environment sensing, bio and medical sensing, security monitoring, laser machining, encrypted data transmission, and precise spectroscopy, etc.

The Guest Editors invite contributions to this Special Issue of Sensors in relation, but not limited, to the following topics:

  • Novel fiber designs and fabrication;
  • Mechanical and electromagnetic field fiber sensors;
  • Chemical and biological fiber sensors;
  • Distributed fiber sensors;
  • Multi-parameter fiber sensors;
  • Structural health monitoring systems based on fiber sensors;
  • Microstructured optical fiber sensors;
  • Fiber laser sensors;
  • Novel fiber sensors for harsh environments;
  • Multiplexed and networked fiber sensors;
  • High-power fiber lasers;
  • Pulsed fiber lasers;
  • Single-frequency fiber lasers;
  • Multi-line fiber lasers;
  • Random fiber lasers;
  • Applications of fiber lasers.

Dr. Ping 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. 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
  • fiber sensors
  • harsh environment sensing, fiber lasers
  • fiber communication
  • laser machining

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Further information on MDPI's Special Issue policies can be found here.

Published Papers (3 papers)

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Research

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15 pages, 2416 KiB  
Article
Research on Self-Diagnosis and Self-Healing Technologies for Intelligent Fiber Optic Sensing Networks
by Ruiqi Zhang, Liang Fan and Dongzhu Lu
Sensors 2025, 25(6), 1641; https://doi.org/10.3390/s25061641 - 7 Mar 2025
Viewed by 550
Abstract
To address the issue of insufficient reliability of fiber optic sensing networks in complex environments, this study proposes a self-diagnosis and self-healing method based on intelligent algorithms. This method integrates redundant fiber paths and a fault detection mechanism, enabling rapid data transmission recovery [...] Read more.
To address the issue of insufficient reliability of fiber optic sensing networks in complex environments, this study proposes a self-diagnosis and self-healing method based on intelligent algorithms. This method integrates redundant fiber paths and a fault detection mechanism, enabling rapid data transmission recovery through redundant paths during network faults, ensuring the stable operation of the monitoring system. Unlike traditional self-diagnosis techniques that rely on an optical time domain reflectometer, the proposed self-diagnosis algorithm utilizes data structure analysis, significantly reducing dependence on costly equipment and improving self-diagnosis efficiency. On the hardware front, a light switch driving device that does not require an external power source has been developed, expanding the application scenarios of optical switches and enhancing system adaptability and ease of operation. In the experiments, three fiber optic sensing network topologies—redundant ring structure, redundant dual-ring structure, and redundant mesh structure—are constructed for testing. The results show that the average self-diagnosis time is 0.1257 s, and the self-healing time is 0.5364 s, validating the efficiency and practicality of the proposed method. Furthermore, this study also proposes a robustness evaluation model based on sensor perception ability and coverage uniformity indicators, providing a theoretical basis for the self-healing capability of fiber optic sensing networks. This model aids in network topology optimization and fault recovery strategy design, contributing to the improvement of the stability and reliability of fiber optic sensing networks in practical applications. Full article
(This article belongs to the Special Issue Advances in Optical Fiber Sensors and Fiber Lasers)
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17 pages, 8680 KiB  
Article
Double-Clad Antiresonant Hollow-Core Fiber and Its Comparison with Other Fibers for Multiphoton Micro-Endoscopy
by Marzanna Szwaj, Ian A. Davidson, Peter B. Johnson, Greg Jasion, Yongmin Jung, Seyed Reza Sandoghchi, Krzysztof P. Herdzik, Konstantinos N. Bourdakos, Natalie V. Wheeler, Hans Christian Mulvad, David J. Richardson, Francesco Poletti and Sumeet Mahajan
Sensors 2024, 24(8), 2482; https://doi.org/10.3390/s24082482 - 12 Apr 2024
Cited by 3 | Viewed by 1596
Abstract
Label-free and multiphoton micro-endoscopy can transform clinical histopathology by providing an in situ tool for diagnostic imaging and surgical treatment in diseases such as cancer. Key to a multiphoton imaging-based micro-endoscopic device is the optical fiber, for distortion-free and efficient delivery of ultra-short [...] Read more.
Label-free and multiphoton micro-endoscopy can transform clinical histopathology by providing an in situ tool for diagnostic imaging and surgical treatment in diseases such as cancer. Key to a multiphoton imaging-based micro-endoscopic device is the optical fiber, for distortion-free and efficient delivery of ultra-short laser pulses to the sample and effective signal collection. In this work, we study a new hollow-core (air-filled) double-clad anti-resonant fiber (DC-ARF) as a high-performance candidate for multiphoton micro-endoscopy. We compare the fiber characteristics of the DC-ARF with a single-clad anti-resonant fiber (SC-ARF) and a solid core fiber (SCF). In this work, while the DC-ARF and the SC-ARF enable low-loss (<0.2 dBm−1), close to dispersion-free excitation pulse delivery (<10% pulse width increase at 900 nm per 1 m fiber) without any induced non-linearities, the SCF resulted in spectral broadening and pulse-stretching (>2000% of pulse width increase at 900 nm per 1 m fiber). An ideal optical fiber endoscope needs to be several meters long and should enable both excitation and collection through the fiber. Therefore, we performed multiphoton imaging on endoscopy-compatible 1 m and 3 m lengths of fiber in the back-scattered geometry, wherein the signals were collected either directly (non-descanned detection) or through the fiber (descanned detection). Second harmonic images were collected from barium titanate crystals as well as from biological samples (mouse tail tendon). In non-descanned detection conditions, the ARFs outperformed the SCF by up to 10 times in terms of signal-to-noise ratio of images. Significantly, only the DC-ARF, due to its high numerical aperture (NA) of 0.45 and wide-collection bandwidth (>1 µm), could provide images in the de-scanned detection configuration desirable for endoscopy. Thus, our systematic characterization and comparison of different optical fibers under different image collection configurations, confirms and establishes the utility of DC-ARFs for high-performing label-free multiphoton imaging-based micro-endoscopy. Full article
(This article belongs to the Special Issue Advances in Optical Fiber Sensors and Fiber Lasers)
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Review

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20 pages, 1163 KiB  
Review
The Challenges and Opportunities for Performance Enhancement in Resonant Fiber Optic Gyroscopes
by Sumathi Mahudapathi, Sumukh Nandan R, Gowrishankar R and Balaji Srinivasan
Sensors 2025, 25(1), 223; https://doi.org/10.3390/s25010223 - 3 Jan 2025
Viewed by 3475
Abstract
In the last decade, substantial progress has been made to improve the performance of optical gyroscopes for inertial navigation applications in terms of critical parameters such as bias stability, scale factor stability, and angular random walk (ARW). Specifically, resonant fiber optic gyroscopes (RFOGs) [...] Read more.
In the last decade, substantial progress has been made to improve the performance of optical gyroscopes for inertial navigation applications in terms of critical parameters such as bias stability, scale factor stability, and angular random walk (ARW). Specifically, resonant fiber optic gyroscopes (RFOGs) have emerged as a viable alternative to widely popular interferometric fiber optic gyroscopes (IFOGs). In a conventional RFOG, a single-wavelength laser source is used to generate counter-propagating waves in a ring resonator, for which the phase difference is measured in terms of the resonant frequency shift to obtain the rotation rate. However, the primary limitation of RFOG performance is the bias drift, which can be attributed to nonreciprocal effects such as Rayleigh backscattering, back-reflections, polarization instabilities, Kerr nonlinearity, and environmental fluctuations. In this paper, we review the challenges and opportunities of achieving performance enhancement in RFOGs. Full article
(This article belongs to the Special Issue Advances in Optical Fiber Sensors and Fiber Lasers)
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