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Applied Sciences
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Progress in Fiber Bragg Gratings Sensor
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Progress in Fiber Bragg Gratings Sensor

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Optics and Lasers".

Deadline for manuscript submissions: 30 September 2024 | Viewed by 902

Special Issue Editors

Dr. Shun Wang

E-Mail Website
Guest Editor
School of Civil and Environmental Engineering, Nanyang Technological University, Singapore 639798, Singapore
Interests: fiber optic sensing; fiber laser; structural health monitoring; distributed fiber optic sensing
Dr. Wenjun Ni

E-Mail Website
Guest Editor
Hubei Key Laboratory of Intelligent Wireless Communications, Hubei Engineering Research Center of Intelligent IOT technology, College of Electronics and Information Engineering, South-Central Minzu University, Wuhan 430074, China
Interests: high-precision photoacoustic spectrum detection; special microstructure fiber devices; orbital angular momentum optical communication; visible light communication
Special Issues, Collections and Topics in MDPI journals
Dr. Liang Zhang

E-Mail Website
Guest Editor
School of Electronic Information and Electrical Engineering, Changsha University, Changsha 410022, China
Interests: photoelectric detection; optical fiber sensing; demodulation methods
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Fiber Bragg gratings (FBGs) are used in sensor and telecommunication industries for their ability to reflect specific wavelengths of light, due to periodic changes in the refractive index (RI) of an optical fiber. FBGs have been a key technology in the field of fiber optic sensing (FOS) since their discovery, and are commonly used in fiber FOS systems nowadays. FBGs are popular for their inherent superiorities, including their small size, fast response, quasi-distributed sensing capabilities, anti-harsh environment, and immunity to EMI. They are widely used to measure physical parameters such as strain, pressure, temperature, RI, acoustic, shape, humidity, gas, etc., and in various fields, including civil engineering, industrial engineering, military, maritime, and aerospace. In recent years, there has been a strong focus on using FBG-based sensors for structural health monitoring (SHM) of various engineering and civil structures.

FBGs can be of different types, including uniform fiber Bragg grating (UFBG), long-period fiber Bragg grating (LFBG), chirped fiber Bragg grating (CFBG), tilted fiber Bragg grating (TFBG), ultra-weak fiber Bragg grating (uwFBG), or phase-shifted fiber Bragg grating (PS-FBG), and have drawn researchers’ attention in previous decades.

This research topic aims to present the most recent research progress in manufacturing methods, model modeling, special design, theoretical analysis, experimental investigations, demodulation methods and applications, device development, sensing performance optimization, and demodulation methods for innovative FBG sensors. Potential topics include, but are not limited to, the following:

  • Manufacturing methods for FBGs;
  • Special design for FBGs;
  • Physical sensors, biosensors and chemical sensors based on FBGs;
  • Special or multi-functional FBG sensors;
  • FBG sensors and devices;
  • Demodulating methods and algorithms based on FBG sensors;
  • Multiplexing methods for FBG sensors;
  • Signal processing for FBG sensors;
  • Multi-DOF sensing based on FBGs;
  • Structural health monitoring and other applications of FBG sensors.

Dr. Shun Wang
Dr. Wenjun Ni
Dr. Liang Zhang
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. Applied Sciences 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 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 Bragg grating
  • FBG design
  • manufacture
  • FBG sensors
  • FBG devices
  • demodulation methods
  • FBG multiplexing
  • signal processing
  • FBG application

Published Papers (1 paper)

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Research

11 pages, 3112 KiB  
Article
Long-Period Grating with Asymmetrical Modulation for Curvature Sensing
by Lan Su, Xin Qiu, Rui Guo, Youbo Jing, Chaoshan Yang and Shuhui Liu
Appl. Sci. 2024, 14(5), 1895; https://doi.org/10.3390/app14051895 - 25 Feb 2024
Viewed by 499
Abstract
We propose and demonstrate a curvature sensor based on long-period fiber grating (LPFG) with asymmetric index modulation. The LPFG is fabricated in single-mode fiber with femtosecond laser micromachining. The grating structure is not introduced in the central fiber core, but is located off-axis [...] Read more.
We propose and demonstrate a curvature sensor based on long-period fiber grating (LPFG) with asymmetric index modulation. The LPFG is fabricated in single-mode fiber with femtosecond laser micromachining. The grating structure is not introduced in the central fiber core, but is located off-axis with a distance of a few micrometers. Experimental results indicate that the offset distance has direct influence on the grating spectra. By utilizing such an asymmetric structure, two-dimensional vector curvature sensing can be realized. For an LPFG with an offset distance of 6 μm, the curvature sensitivity is around 29 nm/m−1 in the 0° and 180° direction and about 20 nm/m−1 in the 90° and 270° direction. The difference in curvature sensitivity in different bending directions makes the sensor capable of distinguishing the curvature orientation. The temperature response of the sensor is also experimentally investigated, and results indicate that the sensor has a very low temperature cross-sensitivity of 0.003 m−1/°C. The characteristics of high curvature sensitivity, two-dimensional bending direction identification, and compact structure make the device an ideal candidate to be applied in the field of power grid health monitoring and intelligent robotics. Full article
(This article belongs to the Special Issue Progress in Fiber Bragg Gratings Sensor)
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