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Optical strain sensors are devices, typically based on fiber optics, for measuring mechanical strain. They offer key advantages over electronic gauges, such as immunity to electromagnetic interference and
Fiber Bragg gratings (FBGs) can be used as sensors to monitor stress and test temperature during the processing and handling of optical fiber. As the FBG experiences a combination of mechanical and
This review paper aims to give a general understanding of the basic principles of FBG sensors, advances in sensing and data processing techniques, developments of novel optical fiber
With a unique test bench, built of a mirror furnace capable of heating specimens and a tensile testing machine that can pull the prepared specimen simultaneously, it is now possible to
Abstract A fiber Bragg grating (FBG) pressure sensor using square diaphragm, dowel bar, and constant-strength cantilever beam (CSCB) as the stress transfer structure is proposed in this paper. The
The author first introduced the principle of fiber optic sensors, then analyzed the technology of demodulating fiber optic gratings, and discussed the application of fiber optic sensing
A bolometer-optical microresonator infrared sensor is designed to detect changes in infrared light intensity. It has a frame with two legs that support a small island, which contains important
In-situ measurements of strains with optical fibers with Fiber Bragg Grating were performed by Hüther and Brøndsted and Hoffman et al. to investigate the free contraction of
Use of suitable lithographic techniques, to fabricate periodic optical fibre structures such as Long-period Fibre Gratings (LPFG) or Long period Waveguide Gratings (LPWG).
In addition to the experiments demonstrating the possibility of measuring strains with fiber-optic strain sensors based on Bragg gratings embedded into the material, the results of a
Fiber Bragg grating (FBG) sensors have emerged as advanced tools for monitoring a wide range of physical parameters in various fields, including structural health, aerospace, biochemical,
A compact fiber Bragg grating (FBG)-based strain sensor has been developed by embedding an FBG inside a 3D-printed structure, allowing the comparison
In this work, we investigate the sensing performance of Fiber Bragg Gratings (FBGs) engineered to operate near EPs through precise structural tuning. By aligning the reflection spectrum edges with
In this study, we propose an innovative approach using hybrid ultra-weak fiber Bragg gratings (UWFBGs) to achieve multi-parameter sensing. Utilizing wavelength demodulation and
Long period fiber gratings in hollow-core air-silica photonic bandgap fibers were produced by use of high frequency, short duration, CO2 laser pulses to periodically modify the size, shape and
Optical fiber sensors in border detection application: Temperature, strain and pressure distinguished detection using fiber Bragg grating and fluorescence intensity ratio
There are different types of fiber optic sensors, viz. intensity-based, polarization-based, grating-based, scattering-based sensors, reported in the literature for varieties of applications in
In this study, a fiber Bragg grating sensor utilizing multi-mode optical fiber (MM-FBG) is proposed. This sensor can simultaneously detect both temper
The authors demonstrated a kilometer-scale optomechanical sensor network by integrating multiple fiber-optic optomechanical sensors into a standard single-mode fiber, enabling
Structural health monitoring (SHM) is essential for ensuring the safety and longevity of civil engineering structures, particularly as many aging infrastructures face increased stress and
Fiber Bragg grating (FBG) optical sensors have emerged as a leading technology for distributed strain and temperature measurement. Their unique attributes—compactness, immunity to electromagnetic
In this work, arrays of fiber Bragg grating optical strain sensors are attached to glass-epoxy solid laminate composite specimens that were subsequently subjected to specific levels of fully reversed
Abstract In-fiber Bragg grating filters continue to proliferate, and their applications expand with the rapid advancement of fiber optic component fabrication techniques. Mathematical models for
Fibre Bragg grating (FBG) strain sensors are not only a very well-established research field, but they are also acquiring a bigger market share due to their sensitivity and low costs. In this
This research explores the deployment of Fiber Bragg Grating (FBG) fiber-optic sensors for embedded, high-precision deformation monitoring in civil infrastructure.
The paper presents the design, operation, and proof of principle realisation and validation of a relatively cheap fibre optic strain sensor based on two fibre Bragg grating (FBG) elements with
The research highlights the advantages of using smaller-diameter optical fibers for AE detection, providing superior sensitivity and performance across the entire ultrasonic range.
Violakis et al. (contribution 2) explored the use of optical-fiber-based acoustic emission (AE) detection sensors, specifically Fiber Bragg Grating (FBG) sensors, for structural health
Fiber Bragg grating technology is being developed to monitor the actual stress history experienced by a fiber during processing and handling. This capability requires the dynamic monitoring of the return