Polarization fading mitigation in distributed acoustic sensors based on a high-speed polarization rotator

Gorajoobi, Shahab Bakhtiari; Masoudi, Ali; Brambilla, Gilberto

doi:10.1364/ol.450388

Cited by 13 publications

(5 citation statements)

References 30 publications

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“…In 2016, Rao et al [ 47 ] used the IQ demodulation method to process the optical fiber tensile-deformation signal, which marked the entry of DAS into the field of quantitative monitoring. At present, DAS technology has achieved significant development due to improvements in polarization fading, coherent fading, spatial resolution, frequency response, signal-to-noise ratio, detection range, and other performance indicators [ 48 ]. The development history of DAS is shown in Figure 8 below.…”

Section: Research Progress Of Das Technologymentioning

confidence: 99%

Overview of Health-Monitoring Technology for Long-Distance Transportation Pipeline and Progress in DAS Technology Application

Wu,

Gao,

Chai

et al. 2024

Sensors

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There are various health issues associated with the different stages of long-distance pipeline transportation. These issues pose potential risks to environmental pollution, resource waste, and the safety of human life and property. It is essential to have real-time knowledge of the overall health status of pipelines throughout their entire lifecycle. This article investigates various health-monitoring technologies for long-distance pipelines, providing references for addressing potential safety issues that may arise during long-term transportation. This review summarizes the factors and characteristics that affect pipeline health from the perspective of pipeline structure health. It introduces the principles of major pipeline health-monitoring technologies and their respective advantages and disadvantages. The review also focuses on the application of Distributed Acoustic Sensing (DAS) technology, specifically time and space continuous monitoring technology, in the field of pipeline structure health monitoring. This paper discusses the process of commercialization development of DAS technology, the main research progress in the experimental field, and the open research issues. DAS technology has broad application prospects in the field of long-distance transportation pipeline health monitoring.

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Section: Research Progress Of Das Technologymentioning

confidence: 99%

Overview of Health-Monitoring Technology for Long-Distance Transportation Pipeline and Progress in DAS Technology Application

Wu,

Gao,

Chai

et al. 2024

Sensors

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“…Rayleigh scattering is caused by the scattering of light from the constituent material of the waveguide in which it is propagating, or other sources of refractive index fluctuations, with dimensions much smaller than the wavelength of the incident light. The scattering intensity is highly dependent on the incident wavelength and is proportional to 1/λ 4 [32], where λ is the wavelength of the propagating optical signal. In a Φ-OTDR, the probing signal is a short pulse of coherent light that propagates into the fiber to generate phase-sensitive coherent Rayleigh scattering.…”

Section: Theorymentioning

confidence: 99%

“…Although ample research has so far been dedicated to the study of DAS configurations with improved performance in terms of parameters including sensing distance, polarization fading [32], and spatial resolution, there have been limited efforts toward simplifying the key components in the source or receiver of the interrogation units which could lead to compact solutions for high-SNR, long distance DAS schemes, also paving the way for possible integration of optoelectronic components and an eventual reduction in their overall cost. In this contribution, we show that an integrated DDS device can be used in a compact source together with a miniaturized EYDFA while being synchronized with a PXI-based system for real-time acquisition of traces in a high-SNR, long distance DAS [33].…”

Section: Introductionmentioning

confidence: 99%

A Compact Source for a DAS without Trace Averaging based on a Low Phase Noise DDS and Mini-EYDFA

Demise,

Pasquale,

Muanenda

2024

Preprint

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“…Although ample research has so far been dedicated to the study of DAS configurations with improved performance including sensing distance 13 , polarization fading 14 , vibration precision and spatial resolution 15 , there are limited efforts toward simplifying the interrogation units to reduce the high cost and complexity so as to widen the practical use of the technology by small enterprises and individual customers.…”

Section: Introductionmentioning

confidence: 99%

A compact source for a distributed acoustic sensor using a miniaturized EYDFA and a direct digital synthesis module

Demise

Pasquale²,

Muanenda

2023

SPIE Future Sensing Technologies 2023

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Distributed Acoustic Sensing (DAS) is a ubiquitous technique which enables concurrent, real-time measurement of fault or event-induced vibrations over long distances. Although there has been focused research in increasing the performance of DAS based on Phase-Sensitive Optical Time Domain Reflectometry (Φ-OTDR), the cost of conventional schemes remains high due to the complexity of the opto-electronic components in the sources used in the interrogator for high coherent Rayleigh scattering visibility, which rely on optical amplifiers designed for wideband telecom networks and multi-purpose waveform generators. However, probes in DAS use narrow linewidth lasers, whose fluctuations are well below the bandwidth of a single ITU grid and the driving waveforms can be generated by compact RF sources. In this contribution, we propose and experimentally demonstrate the design of a compact DAS interrogator using a miniaturized Erbium-Ytterbium-Doped Fiber Amplifier (EYDFA) commonly used in CATV networks together with an integrated Direct Digital Synthesis (DDS) module which can generate readily programmable waveform probes with a bandwidth of up to 1.4 GHz. The DDS module is suitable for use with any digital acquisition system for real-time acquisition of traces. Optical pulse probes generated with the DDS an a miniaturized EYDFA were used to obtain coherent Rayleigh backscattering traces with high SNR and interference visibility, allowing the measurement of a generic vibration at the end of a 10-km fiber. The proposed technique enables the simplification of DAS systems and paves the way toward their scalable development for wider use in among others environmental, seismic and structural health monitoring systems.

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Polarization fading mitigation in distributed acoustic sensors based on a high-speed polarization rotator

Cited by 13 publications

References 30 publications

Overview of Health-Monitoring Technology for Long-Distance Transportation Pipeline and Progress in DAS Technology Application

Overview of Health-Monitoring Technology for Long-Distance Transportation Pipeline and Progress in DAS Technology Application

A Compact Source for a DAS without Trace Averaging based on a Low Phase Noise DDS and Mini-EYDFA

A compact source for a distributed acoustic sensor using a miniaturized EYDFA and a direct digital synthesis module

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