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Photonics
Special Issues
Emerging Trends in Fiber Optic Sensing
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Emerging Trends in Fiber Optic Sensing

A special issue of Photonics (ISSN 2304-6732). This special issue belongs to the section "Lasers, Light Sources and Sensors".

Deadline for manuscript submissions: closed (30 September 2025) | Viewed by 4092

Special Issue Editors

Dr. Haiyang Wang

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Guest Editor
State Key Laboratory of Dynamic Measurement Technology, North University of China, Taiyuan 030051, China
Interests: Brillouin fiber sensors; distributed fiber sensing; chalcogenide fiber sensors; Brillouin lasers; random fiber lasers; fiber tapering and fabrication; fiber optics; nonlinear optics
Special Issues, Collections and Topics in MDPI journals
Dr. Guowen An

E-Mail Website
Guest Editor
Science and Technology on Electronic Test and Measurement Laboratory, North University of China, Taiyuan 030051, China
Interests: fiber-optic sensors; photonic crystal fiber
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Fiber optic sensors have become increasingly significant due to their unique advantages, such as high sensitivity, immunity to electromagnetic interference, and ability to operate in harsh environments. The rapid advancements in materials, fabrication techniques, and signal processing algorithms have further expanded the capabilities of fiber optic sensors, enabling unprecedented precision and functionality. The Special Issue aims to explore the latest advancements and innovative applications in the field of fiber optic sensing technologies.

Potential authors are invited to contribute original research articles that explore novel sensing mechanisms, advanced materials, and integrated systems that push the boundaries of current technology. Topics of interest include, but are not limited to, distributed sensing, multiplexing techniques, micro- and nano-structured fibers, and lasing sensing. This Special Issue also encourages submissions that explore the practical implementation of these technologies in real-world scenarios, providing insights into their scalability and commercial viability.

This Special Issue seeks to highlight the latest trends, address existing challenges, and inspire future directions in fiber optic sensing. We welcome original research articles that contribute to the advancement of the fiber sensing field.

Dr. Haiyang Wang
Dr. Guowen An
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 250 words) can be sent to the Editorial Office for assessment.

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.

Keywords

  • fiber sensing
  • distribued fiber sensing
  • optical sensing
  • laser sensing
  • signal processing
  • grating-based sensors
  • manufacturing of sensor devices
  • structural helath monitoring
  • temperature/pressure /acoustic/strain sensors
  • applications of sensors

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Published Papers (3 papers)

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Research

14 pages, 1994 KB  
Article
Long-Haul Microwave-Photonic Optical Fiber Transfer Delay Measurement via Microwave Signal Interferometry
by Yiguang Yang, Hengrui Liu, Ziyi Wang, Hanwen Zhang, Hongyu Li, Yibo Yuan and Xujin Li
Photonics 2025, 12(10), 949; https://doi.org/10.3390/photonics12100949 - 23 Sep 2025
Viewed by 428
Abstract
Optical-carried microwave interferometry (OCMI) has attracted increasing attention in recent years, as it combines the ease of phase extraction and manipulation of microwave techniques with the low-loss transfer of optical fibers. Conventional OCMI implementations typically employ broadband light sources and coherent photodetection, which [...] Read more.
Optical-carried microwave interferometry (OCMI) has attracted increasing attention in recent years, as it combines the ease of phase extraction and manipulation of microwave techniques with the low-loss transfer of optical fibers. Conventional OCMI implementations typically employ broadband light sources and coherent photodetection, which inevitably suffer from dispersion, polarization fading, and phase drift, severely limiting the achievable sensing distance. In this work, we proposed an optimized OCMI architecture that adopts incoherent photodetection combined with electric-domain microwave interferometry. Comprehensive theoretical analysis and systematic experiments demonstrate that the proposed system enables robust, dynamic, and long-haul fiber transfer delay (FTD) measurements, no less than in 15 km length, with improved resolution and stability. It provides new insight for building long-haul FTD sensor networks. Full article
(This article belongs to the Special Issue Emerging Trends in Fiber Optic Sensing)
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20 pages, 10176 KB  
Article
Theoretical Analysis of Vernier-Effect-Induced Sensitivity Enhancement of Dual Fiber Fabry-Pérot Cavities in OFDRs
by Mingxin Wang and Yueyu Xiao
Photonics 2025, 12(9), 936; https://doi.org/10.3390/photonics12090936 - 19 Sep 2025
Viewed by 615
Abstract
The vernier-effect-based sensitivity enhancement of two kinds of sensing units consisting of dual fiber Fabry-Pérot (FP) cavities in the Optical Frequency Domain Reflectometry (OFDR) is analyzed in this paper. Theoretical analysis reveals that significant differences exist in the sensitivity enhancement between the cascaded [...] Read more.
The vernier-effect-based sensitivity enhancement of two kinds of sensing units consisting of dual fiber Fabry-Pérot (FP) cavities in the Optical Frequency Domain Reflectometry (OFDR) is analyzed in this paper. Theoretical analysis reveals that significant differences exist in the sensitivity enhancement between the cascaded and parallel dual fiber FP cavties when demodulated by an OFDR system. When the conditions of the vernier effect are satisfied, the sensing unit with cascaded FP cavities does not exhibit a sensitivity enhancement compared to a single FP sensor, whereas the sensing unit with parallel FP cavities can achieve an enhanced sensitivity. This phenomenon differs from that observed in direct wavelength interrogation systems. The results are further verified with numerical simulations on the temperature sensing. When the vernier-effect conditions are met, the sensitivity of the sensing unit with cascaded FP sensors is 9.99 pm/°C, while the sensitivity of the sensing unit with parallel FP sensors can reach up to 128.97 pm/°C. The findings of this paper provide valuable insights for the design of high-sensitive distributed optical fiber sensing systems. Full article
(This article belongs to the Special Issue Emerging Trends in Fiber Optic Sensing)
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11 pages, 9569 KB  
Article
MgO-Based Fabry-Perot Vibration Sensor with a Fiber-Optic Collimator for High-Temperature Environments
by Jiacheng Tu, Qirui Zhao, Jiantao Hu, Yuhao Huang, Haiyang Wang, Jia Liu and Pinggang Jia
Photonics 2025, 12(6), 524; https://doi.org/10.3390/photonics12060524 - 22 May 2025
Viewed by 2725
Abstract
In this paper, a MgO-based high-temperature Fabry-Perot (F-P) vibration sensor with a fiber-optic collimator is proposed and experimentally demonstrated at 1000 °C. The sensor is composed of a sensing unit and a fiber-optic collimator. The F-P cavity is formed by the upper surface [...] Read more.
In this paper, a MgO-based high-temperature Fabry-Perot (F-P) vibration sensor with a fiber-optic collimator is proposed and experimentally demonstrated at 1000 °C. The sensor is composed of a sensing unit and a fiber-optic collimator. The F-P cavity is formed by the upper surface of the inertial mass block and the countersunk hole of the cover layer. The length of the F-P cavity changes with external vibrations. The sensing unit is prepared by wet etching technology and three-layer direct bonding technology, which ensure its stability and reliability in high-temperature environments. The experimental results indicate that the sensor can operate stably within a range from room temperature up to 1000 °C. The sensitivity and non-linearity of the sensor at 1000 °C are 1.3224 nm/g and 3.8%, respectively. Furthermore, the sensor operates at frequencies of up to 4 kHz while remaining unaffected by lateral vibration signals. The high-temperature F-P vibration sensor can effectively deal with the fiber damage in extreme environments and exhibits considerable potential for widespread applications. Full article
(This article belongs to the Special Issue Emerging Trends in Fiber Optic Sensing)
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