Section snippets Measurement principle A low-coherence interferometry-based optical sensor typically consists of a sensing interferometer (SI) which is usually a low-finesse FPI, a local
Read MoreIn summary, we have demonstrated a simulation and hardware implementation of demodulation system based on linear edge filtering method for fiber optic seismic sensor.
Read Mored quadratures. This extension, IQ demodulation, is functionally equivalent to 8-port optical homodyne meas-urements , though it has the benefit of compactness and robustness due to its
Read MoreOptical Phase/Frequency Demodulation using Polarization-Maintaining Fiber Bragg Gratings Dipen Barot, Member, Optica, Rui Zhou, Student Member, Optica, and Lingze Duan, Senior Member, IEEE,
Read MoreThis paper presents and experimental demonstrated a twice-FFT demodulation method for signal distortion state in an optical fiber FP acoustic sensor. The obvious harmonic distortion on
Read MoreIn this paper, a novel phase demodulation method for DAS is proposed. In the proposed method, four pairs of probing pulses are used to construct the IQ components for phase demodu-lation. Compared
Read MoreThe IQ demodulation method is a popular choice for phase sensitive optical time domain reflectometry at present. This paper provides a reference for the OFVS to realize vibration detection
Read MoreWe propose a phase demodulation algorithm in interferometric fiber-optic sensing systems based on 3 × 3 coupler demodulation with high robustness and strong disturbance resistance, which...
Read MoreA fast real-time demodulation method based on the coarsely sampled spectrum is proposed for transient signals of fiber optic extrinsic Fabry-Perot interferometers (EFPI) sensors.
Read MoreThis paper review recent advances in Raman distributed optical fiber sensing in terms of temperature measurement accuracy, spatial resolution, dual-parameters and applications.
Read MoreIn this paper, we present a novel design of a PGC-DCM demodulation scheme of the fiber optic interferometric sensor for undergraduate physics/optics laboratories.
Read MoreHowever, these approaches generally struggle to achieve both high speed and high resolution simultaneously in sensing demodulation. Microwave photonics (MWP)-based fiber-optic
Read MoreIn this paper, we propose and demonstrate a high accuracy, multi-signal demodulation method for distributed, wide-frequency domain optical fiber sensing. For real time detection, wavelet
Read MoreIn an embodiment, the demodulation system includes a transmitting module, a fiber-optic Fabry Perot sensor, a light splitting module, a filter module, a receiving module, and a processing...
Read MoreProposing a transformer partial discharge localization method based on optical and electric collaborative acoustic sensing technology. Firstly, a collaborative deployment scheme for distributed
Read MoreAn improved fiber-optic distributed acoustic sensor (DAS) using a LiNbO 3 straight through waveguide electro-optic phase modulator and a novel phase demodulation method based on
Read MoreWe propose and demonstrate a demodulation scheme for interferometric optical fiber sensing using combined waveform phase modulation.
Read MoreIn this paper, we proposed a digitalized phase demodulation method for phase sensitive optical time domain reflectometer (φ -OTDR) sensing system. The experimental results confirm that
Read MoreIn this work, a visible-light spectral demodulation system with a square-cross-correlation (SCC) algorithm for the cavity length interrogation of fiber-optic SiC FP sensors is proposed and
Read MoreAbstract For the cavity length demodulation of fiber-optic Fabry-Perot (FP) sensors, a frequency-doubled self-correlation algorithm was proposed. Since the frequency doubling can make
Read MoreA high performance and miniaturized micro-vibration sensing system is highly desirable for satellite payload platforms. In this paper, a compact micro-vibration sensing system assisted with silicon
Read MoreIn this paper, a novel phase resolving method is proposed and used in an interferometric fiber optic sensing system. Comparison between proposed method and commercial IQ demodulator is carried out.
Read MoreIn advanced sensor system designs, one of the common methods involves converting target physical quantities into phase-/frequency-modulated signals (PM/FM signal). Then, the in-phase/quadrature
Read MoreThe principle of φ-OTDR and the IQ demodulation algorithm is introduced. Common mono-mode dark optical fiber simulates th...
Read MoreDownload Citation | Demodulation algorithm for optical fiber F–P sensor | The demodulation algorithm is very important to improving the measurement accuracy of a sensing
Read MoreSince 1980, optical fiber sensors based on the principle of interference have been widely used. Among these, the optical fiber Fabry–Pérot sensor based on the principle of Fabry–Pérot
Read MoreAbstract We propose and demonstrate a demodulation scheme for interferometric optical fiber sensing using combined waveform phase modulation.
Read MoreThe demodulation system is a very critical component of the seismic exploration, which determines the response speed and accuracy of data acquisition of the detection system. Here, we
Read MoreThis paper addresses the issue of low demodulation accuracy in interferometric signals caused by significant errors in direct peak finding and positioning during multi-peak demodulation of
Read MoreThe fiber‐optic Fabry–Perot high‐temperature sensor based on sapphire materials has the advantages of electromagnetic interference
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