Performance Analysis of Scattering-Level Multiplexing (SLMux) in Distributed Fiber-Optic Backscatter Reflectometry Physical Sensors

Tosi, Daniele; Molardi, Carlo; Blanc, Wilfried; Paixão, Tiago; Antunes, Paulo; Marques, Carlos

doi:10.3390/s20092595

Cited by 17 publications

(9 citation statements)

References 32 publications

(119 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Temperature monitoring of the thermal ablation has been conducted with the OBR instrument, the working principle of which is based on Rayleigh backscattering. The instrument measures the scattering of light from each infinitesimal section of the fiber and produces a spectrum of backscattered light as a function of position along the fiber (e.g., Figure 1 b) [ 46 , 47 , 48 ]. The OBR instrument calculates the spectral shift of the fiber exposed to the external stimulus (temperature in this case) by dividing the spectrum into small Sections (5 mm in this experiment).…”

Section: Methodsmentioning

confidence: 99%

Distributed Sensing Network Enabled by High-Scattering MgO-Doped Optical Fibers for 3D Temperature Monitoring of Thermal Ablation in Liver Phantom

Beisenova

Issatayeva

Ashikbayeva

et al. 2021

Sensors

Self Cite

View full text Add to dashboard Cite

Thermal ablation is achieved by delivering heat directly to tissue through a minimally invasive applicator. The therapy requires a temperature control between 50–100 °C since the mortality of the tumor is directly connected with the thermal dosimetry. Existing temperature monitoring techniques have limitations such as single-point monitoring, require costly equipment, and expose patients to X-ray radiation. Therefore, it is important to explore an alternative sensing solution, which can accurately monitor temperature over the whole ablated region. The work aims to propose a distributed fiber optic sensor as a potential candidate for this application due to the small size, high resolution, bio-compatibility, and temperature sensitivity of the optical fibers. The working principle is based on spatial multiplexing of optical fibers to achieve 3D temperature monitoring. The multiplexing is achieved by high-scattering, nanoparticle-doped fibers as sensing fibers, which are spatially separated by lower-scattering level of single-mode fibers. The setup, consisting of twelve sensing fibers, monitors tissue of 16 mm × 16 mm × 25 mm in size exposed to a gold nanoparticle-mediated microwave ablation. The results provide real-time 3D thermal maps of the whole ablated region with a high resolution. The setup allows for identification of the asymmetry in the temperature distribution over the tissue and adjustment of the applicator to follow the allowed temperature limits.

show abstract

Section: Methodsmentioning

confidence: 99%

Distributed Sensing Network Enabled by High-Scattering MgO-Doped Optical Fibers for 3D Temperature Monitoring of Thermal Ablation in Liver Phantom

Beisenova

Issatayeva

Ashikbayeva

et al. 2021

Sensors

Self Cite

View full text Add to dashboard Cite

show abstract

“…This impacts the distribution of the sensing points. A new method has been proposed to overcome this scenario, named "scattering-level multiplexing" (SLMux) (Beisenova et al, 2019b;Tosi et al, 2020a). This concept relies on the use of nanoparticle-doped fibers, the sensing fibers spliced to standard single-mode fibers (SMFs), used as extenders.…”

Section: Introductionmentioning

confidence: 99%

Toward Engineered Nanoparticle-Doped Optical Fibers for Sensor Applications

Robine

Molardi

et al. 2022

Front. Sens.

Self Cite

View full text Add to dashboard Cite

Nanoparticle-doped optical fibers, investigated first as fiber lasers and fiber amplifiers, have gained tremendous interest over the past few years as fiber sensors. One of the main interests of such fibers relies on the ability to develop a distributed sensor, allowing real-time measurement with multiplexed architecture. To go beyond the actual proof of concept, we discuss in this perspective paper three main challenges to tackle: understanding light propagation in heterogeneous materials, controlling nanoparticle formation in glass, and engineering nanoparticle characteristics. Identified as the main directions to follow, they will contribute to promote nanoparticle-doped fiber sensors in the next few years.

show abstract

“…With interrogation systems based on a scattering signal measurement, discrimination between different sensing fibers can be achieved with a single-channel device. The multiplexing principle, SLMux, was recently published and validated [ 6 , 7 ]. As an alternative, an array of weak gratings can be used as a sensing system using the time-of-flight measurement principle [ 8 , 9 , 10 ].…”

Section: Introductionmentioning

confidence: 99%

Composed Multicore Fiber Structure for Extended Sensor Multiplexing with Fiber Bragg Gratings

Idrisov

Lorenz

Rothhardt

et al. 2022

Sensors

View full text Add to dashboard Cite

A novel multicore optical waveguide component based on a fiber design optimized towards selective grating inscription for multiplexed sensing applications is presented. Such a fiber design enables the increase in the optical sensor capacity as well as extending the sensing length with a single optical fiber while preserving the spatial sensing resolution. The method uses a multicore fiber with differently doped fiber cores and, therefore, enables a selective grating inscription. The concept can be applied in a draw tower inscription process for an efficient production of sensing networks. Along with the general concept, the paper discusses the specific preparation of the fiber-based sensing component and provides experimental results showing the feasibility of such a sensing system.

show abstract

Performance Analysis of Scattering-Level Multiplexing (SLMux) in Distributed Fiber-Optic Backscatter Reflectometry Physical Sensors

Cited by 17 publications

References 32 publications

Distributed Sensing Network Enabled by High-Scattering MgO-Doped Optical Fibers for 3D Temperature Monitoring of Thermal Ablation in Liver Phantom

Distributed Sensing Network Enabled by High-Scattering MgO-Doped Optical Fibers for 3D Temperature Monitoring of Thermal Ablation in Liver Phantom

Toward Engineered Nanoparticle-Doped Optical Fibers for Sensor Applications

Composed Multicore Fiber Structure for Extended Sensor Multiplexing with Fiber Bragg Gratings

Contact Info

Product

Resources

About