Hybrid Distributed Optical Fiber Sensor for the Multi-Parameter Measurements

Zhou, Xiao; Wang, Feng; Yang, Chengyu; Zhang, Zijing; Zhang, Yixin; Zhang, Xuping

doi:10.3390/s23167116

Cited by 3 publications

(1 citation statement)

References 251 publications

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“…The use of distributed fiber optic sensors (DFOSs) [ 11 , 12 , 13 , 14 ] for monitoring systems makes it possible to obtain information about the state of an object with high accuracy and reliability. They can be used to measure temperature [ 15 ], pressure [ 16 , 17 ], gas concentration [ 18 ], vibration [ 19 , 20 ], deformation [ 21 , 22 ], and other parameters.…”

Section: Introductionmentioning

confidence: 99%

An Optical Frequency Domain Reflectometer’s (OFDR) Performance Improvement via Empirical Mode Decomposition (EMD) and Frequency Filtration for Smart Sensing

Belokrylov,

Kambur,

Konstantinov

et al. 2024

Sensors

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We describe a method for reducing the cost of optical frequency domain reflectometer (OFDR) hardware by replacing two reference channels, including an auxiliary interferometer and a gas cell, with a single channel. To extract useful information, digital signal processing methods were used: digital frequency filtering, as well as empirical mode decomposition. It is shown that the presented method helps to avoid the use of an unnecessary analog-to-digital converter and photodetector, while the OFDR trace is restored by the equal frequency resampling (EFR) algorithm without loss of high resolution and with good measurement repeatability.

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Section: Introductionmentioning

confidence: 99%

An Optical Frequency Domain Reflectometer’s (OFDR) Performance Improvement via Empirical Mode Decomposition (EMD) and Frequency Filtration for Smart Sensing

Belokrylov,

Kambur,

Konstantinov

et al. 2024

Sensors

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Multi-parameter distributed fiber sensing system based on hybrid Rayleigh and Brillouin scattering

Lalam,

Bhatta,

Buric

et al. 2024

Photonic Instrumentation Engineering XI

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The integration of Rayleigh and Brillouin scattering in a hybrid sensor system has revolutionized the field of distributed fiber optic sensing. This hybrid sensor system provides a strong and all-encompassing solution for monitoring multiple physical parameters, including strain, temperature, and vibrations along the sensing fiber length by combining the strengths of both scattering phenomena. We present a hybrid multi-parameter distributed sensing system in this paper that is based on the Brillouin and Rayleigh scattering mechanisms. Utilizing a single-end access to the sensing fiber, we measured acoustic vibrations based on phase-sensitive optical time domain reflectometry (Φ-OTDR), whereas we employed a Brillouin optical time reflectometry (BOTDR) for strain and temperature monitoring. The experimental results demonstrate the effectiveness of the hybrid sensor system to achieve simultaneous and independent measurements over a 25 km long single-mode silica fiber at 3 m spatial resolution. Furthermore, we used a large effective area fiber (LEAF) for simultaneous and discriminative strain, temperature, and vibration monitoring in order to get around the cross-sensitivity between the strain and temperature in the BOTDR system. A variety of applications, such as the structural health monitoring of buildings, bridges, and oil and gas pipelines, industrial process control, security, and surveillance, can be served by the suggested multi-parameter hybrid distributed sensor system.

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One Raman DTS Interrogator Channel Supports a Dual Separate Path to Realize Spatial Duplexing

Yao,

Peng,

Chen

et al. 2024

Sensors

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Deploying distributed fiber-optic sensor (DFOS) technology to gather environmental parameters over expansive areas is an essential monitoring strategy in the context of comprehensive searches for anomalous places. This study utilizes a single temperature measurement channel within a commercial Raman-based distributed temperature sensing (RDTS) interrogator and divides it into two separate, uncorrelated paths to enable spatial duplex temperature measurements. The distinction between temperature events corresponding to each path in the dual separate path (DSP) in RDTS can be achieved when temperature events are concurrently occurring in the DSP. Additionally, the RDTS–DSP solution may integrate free space optics (FSO) into its fiber path, which serves to enhance the user-friendliness, scalability, and cost-effectiveness of DFOS technology. An RDTS measurement channel can effectively function as a DSP, thus doubling the RDTS measurement pathway, and can be combined with FSO to significantly improve RDTS performance.

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Hybrid Distributed Optical Fiber Sensor for the Multi-Parameter Measurements

Cited by 3 publications

References 251 publications

An Optical Frequency Domain Reflectometer’s (OFDR) Performance Improvement via Empirical Mode Decomposition (EMD) and Frequency Filtration for Smart Sensing

An Optical Frequency Domain Reflectometer’s (OFDR) Performance Improvement via Empirical Mode Decomposition (EMD) and Frequency Filtration for Smart Sensing

Multi-parameter distributed fiber sensing system based on hybrid Rayleigh and Brillouin scattering

One Raman DTS Interrogator Channel Supports a Dual Separate Path to Realize Spatial Duplexing

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