Raman scattering-based distributed temperature sensors: A comprehensive literature review over the past 37 years and towards new avenues

Silva, Luís C.B.; Segatto, Marcelo E. V.; Castellani, Carlos E. S.

doi:10.1016/j.yofte.2022.103091

Cited by 21 publications

(6 citation statements)

References 488 publications

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“…Most commercially available interrogation devices based on Rayleigh scattering (such as OTDR—optical time‐domain reflectometer and φ‐OTDR—phase‐sensitive OTDR, also known as DAS—distributed acoustic sensor and DVS—distributed vibration sensor), as well as on Raman DTS and Brillouin (BOTDR/BOTDA—Brillouin optical time‐domain reflectometer/analyser also known as DTSS—distributed temperature and strain sensor) have spatial resolution of an order of meters (Fernández‐Ruiz et al, 2022; Li & Zhang, 2022; Lu et al, 2019; Palmieri et al, 2022; Schenato, 2017; Silva et al, 2022); however, a Rayleigh‐scattering‐based optical frequency‐domain reflectometer (OFDR), based on the same measurement technique as certain implementation of light detection and ranging (LiDAR) (Ding et al, 2018), namely frequency‐modulated continuous‐wave (FMCW), has commercially available implementation that allows for a spatial resolution of 1 cm for sensing range of 70 m (Liang et al, 2021).…”

Section: Methodological Backgroundmentioning

confidence: 99%

New concept of permafrost degradation monitoring based on photonics technologies: Case study from Calypsostranda (Bellsund, Svalbard)

Zagórski,

Dobrowolski,

Paździor

et al. 2023

Land Degrad Dev

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Ground temperature measurements are crucial for a better understanding of changes in the natural environment, especially in the Arctic. Previous measurement systems provided accurate measurements; however, their most significant disadvantage was the relatively low spatial resolution, including in the vertical profile. The aim of this work was to develop and initially validate a new, original temperature measurement system based on the photonic sensing technique of optical frequency‐domain reflectometry (OFDR). The system consists of a fibre‐optic sensor, an interrogator, and an automatic data acquisition system. Such fibre‐optic sensors allow a significant increase in spatial resolution. Data on precise temperature distribution in the ground profile will allow for a detailed determination of the changes in the thickness of the permafrost active layer (PAL) and, as a consequence, a better description of the current state of the permafrost and the layers above it in relation to their progressive degradation. In the longer term, it will make a better prediction of the pace of possible changes in the polar environment and will open up previously unavailable opportunities in the field of climate change monitoring and forecasting.

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Section: Methodological Backgroundmentioning

confidence: 99%

New concept of permafrost degradation monitoring based on photonics technologies: Case study from Calypsostranda (Bellsund, Svalbard)

Zagórski,

Dobrowolski,

Paździor

et al. 2023

Land Degrad Dev

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“…Optical temperature sensors have received widespread attention due to their intrinsic safety, high accuracy, fast response and high sensitivity [6]. For example, optical temperature sensors based on the difference between Stokes and anti-Stokes Raman signals make it possible to measure temperature with very high accuracy [7]. Fluorescent temperature sensors are easy to fabricate, can realize accurate and continuous temperature detection by measuring temperature-dependent fluorescence spectra, and are ideal candidates for real-time temperature sensing.…”

Section: Introductionmentioning

confidence: 99%

Glass Ceramic Fibers Containing PbS Quantum Dots for Fluorescent Temperature Sensing

Zha,

Zhang,

Jin

et al. 2024

Nanomaterials

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Glass ceramics (GCs) containing PbS quantum dots (QDs) are prepared for temperature sensing. Broadband emissions are detected in the GCs when PbS QDs are precipitated from the glasses, and emissions centers are modulated from 1250 nm to 1960 nm via heat treatments. The emission centers of GCs exhibit blue-shifts when environment temperatures increase from room temperature to 210 °C. Importantly, the shift values of emission centers increase linearly with the test temperature, which is beneficial for applications in temperature sensing. A temperature sensor based on PbS QDs GC is heat-treated at 500 °C for 10 h, possesses the highest sensitivity of 0.378 nm/°C, and exhibits excellent stability and repeatability at high temperatures (up to 210 °C). Moreover, GC fibers are fabricated by using the GCs as the fiber core. The sensitivity of the temperature-sensing sensor of the GC fibers is also demonstrated and the sensitivity is as high as 0.558 nm/°C. The designed PbS QDs GCs provide a significant materials base for the manufacturing of fluorescent temperature sensors and the GC fibers offer significant opportunities for temperature detection in complex, integrated and compact devices.

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“…In this paper, we propose a method for registering voice commands using a distributed fiber-optic sensor. Distributed optical fiber sensing technologies have become widespread nowadays [8][9][10]. Rayleigh scattering sensors, which operate on the principle of phase-sensitive optical reflectometry in the time domain, are the most sensitive to acoustic frequency fluctuations.…”

Section: Introductionmentioning

confidence: 99%

Detection and Recognition of Voice Commands by a Distributed Acoustic Sensor Based on Phase-Sensitive OTDR in the Smart Home Concept

Gritsenko,

Orlova,

Zhirnov

et al. 2024

Sensors

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In recent years, attention to the realization of a distributed fiber-optic microphone for the detection and recognition of the human voice has increased, whereby the most popular schemes are based on φ-OTDR. Many issues related to the selection of optimal system parameters and the recognition of registered signals, however, are still unresolved. In this research, we conducted theoretical studies of these issues based on the φ-OTDR mathematical model and verified them with experiments. We designed an algorithm for fiber sensor signal processing, applied a testing kit, and designed a method for the quantitative evaluation of our obtained results. We also proposed a new setup model for lab tests of φ-OTDR single coordinate sensors, which allows for the quick variation of their parameters. As a result, it was possible to define requirements for the best quality of speech recognition; estimation using the percentage of recognized words yielded a value of 96.3%, and estimation with Levenshtein distance provided a value of 15.

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Raman scattering-based distributed temperature sensors: A comprehensive literature review over the past 37 years and towards new avenues

Cited by 21 publications

References 488 publications

New concept of permafrost degradation monitoring based on photonics technologies: Case study from Calypsostranda (Bellsund, Svalbard)

New concept of permafrost degradation monitoring based on photonics technologies: Case study from Calypsostranda (Bellsund, Svalbard)

Glass Ceramic Fibers Containing PbS Quantum Dots for Fluorescent Temperature Sensing

Detection and Recognition of Voice Commands by a Distributed Acoustic Sensor Based on Phase-Sensitive OTDR in the Smart Home Concept

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