Home / Pulse-phase fiber optic sensor
We propose and demonstrate a new method of phase-shifting optical fiber sensing, wherein rectangular-pulse binary phase modulation is imposed on the laser source of an interferometric fiber optic sens.
These two are the main sources of error. In view of this, we systematically analyze the sampling interval and modulation depth involved in the
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We propose and demonstrate a new method of phase-shifting optical fiber sensing, wherein rectangular-pulse binary phase modulation is imposed on the laser source of an
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This first demonstration of a R-OPO fibre sensor establishes the foundations for parametric fibre sensors.
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The paper presents the fiber-optic pulse wave velocity sensor, based on the multiplexed extrinsic Fabry-Perot interfer-ometers interrogated by the spectral interferometric approach.
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Abstract— A new architecture of a fiber phase-sensitive optical time-domain reflectometer (φ-OTDR, i.e., a distributed acoustic sensor) suitable for engineering geology
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In conclusion, we present a new high-quality LPF-assisted RPB modulation method for interferometric fiber-optic sensor applications. This method has good noise suppression capability in
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Therefore, this article introduces the Φ -OTDR-based fiber-optic distributed acoustic sensor (DAS), and demonstrates its ability in demodulating and reproducing audio from external
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We discuss the performance of the distributed fiber optic sensor (DFOS) interrogation unit based on the phase-optical time domain reflectometry (ϕ-OTDR) principle.
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A distributed fiber sensor based on Rayleigh scattering is described which converts vibration-induced optical phase changes into optical intensity variations by using modulated dual-pulses injected into
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Abstract Distributed Acoustic Sensor (DAS) has potential in applications such as hydroacoustic detection. In this paper, a dual-pulse
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A singlemode-multimode-singlemode fiber-optic interference sensor was studied in terms of its efficiency for pulse wave signal measurement. It was shown that interfer-ence of lower-order modes of
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Phase-sensitive optical time-domain reflectometry (Φ-OTDR) has the advantages of high accuracy, large dynamic range and wide measurement range. It is suitable for remote monitoring of
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In this paper, we propose a novel, to the best of our knowledge, fading-free fiber sensor structure by incorporating an acousto-optic frequency
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Fiber-optic distributed acoustic sensors (DASs) can be used for various applications, such as seismic wave detection, geological exploration, and large-scale structural health monitoring.
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This investigation successfully developed and validated a novel fiber optic Fabry–Perot interferometer system utilizing quadrature phase demodulation for continuous arterial pulse wave
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Abstract: A polarization-space Michelson interferometric fiber-optic vibration sensor is proposed and experimentally demonstrated. A phase-coherent dual-frequency optical pulse with two orthogonal
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Download Citation | Recent Advancements in Optical Fiber Sensors for Non-Invasive Arterial Pulse Waveform Monitoring Applications: A Review | The awareness of the importance of
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In this paper, frequency-modulated dual-pulse probe is utilized to achieve quantitative demodulation of external vibrations in phase-sensitive optical
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Distributed fiber sensing performance is evaluated for this frequency actively compensated sensor system, showing significant improvement in both long-term stability and signal-to-noise ratio
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We report a novel, to the best of our knowledge, distributed optic-fiber acoustic sensor in which active laser frequency compensation is proposed to
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An all fiber optic current sensor (AFOCS) utilizing ordinary optical fiber is proposed and demonstrated, which is implemented with a phase-shift fiber
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Markvart, Aleksandr Kulik, Daria Petrov, Alexander Liokumovich, Leonid Ushakov, NikolaiThe paper presents a fiber-optic pulse wave sensor based on an intermodal interferometer
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This work introduces a random optical parametric oscillator (R-OPO) fibre sensor that addresses these challenges.
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