Hybrid-Mechanism Distributed Sensing Using Forward Transmission and Optical Frequency-Domain Reflectometry [PDF]
SensorsFiber-optic sensing systems based on a forward transmission interferometric structure can achieve high sensitivity and a wide frequency response over long distances.
Shangwei Dai +6 more
doaj +2 more sources
Doppler optical frequency domain reflectometry for remote fiber sensing
Optics Express, 2021 Coherent optical frequency domain reflectometry has been widely used to locate static reflectors with high spatial resolution. Here, we present a new type of Doppler optical frequency domain reflectometry that offers simultaneous measurement of the position and speed of moving objects.
Abhinav Sharma +2 more
exaly +4 more sources
A Review of Multiparameter Fiber-Optic Distributed Sensing Techniques for Simultaneous Measurement of Temperature, Strain, and Environmental Effects [PDF]
SensorsThis review summarizes recent progress and emerging trends in multiparameter optical fiber sensing, emphasizing techniques that enable the simultaneous measurement of temperature, strain, acoustic waves, pressure, and other environmental quantities ...
Artem Turov +9 more
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Frequency-comb enabled spectrum-correlation reflectometry for distributed fiber-optic sensing [PDF]
Light: Science & ApplicationsDistributed fiber-optic sensing has become an indispensable tool for large-scale structural and environmental monitoring, where spectral interrogation of backscattering light enables high-precision quantitative measurement of external perturbations ...
Zhonghong Lin +5 more
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Incoherent Optical Frequency-Domain Reflectometry Based on Homodyne Electro-Optic Downconversion for Fiber-Optic Sensor Interrogation [PDF]
Sensors, 2019 Fiber-optics sensors using interrogation based on incoherent optical frequency-domain reflectometry (I-OFDR) offer benefits such as the high stability of interference in the radio-frequency (RF) domain and the high SNR due to narrowband RF detection. One
Juan Clement +3 more
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Ghost-peak-based estimation of modulation amplitude in optical correlation-domain reflectometry [PDF]
Scientific ReportsReliable and efficient evaluation of the modulation amplitude is essential for achieving accurate spatial resolution in optical correlation-domain reflectometry (OCDR).
Keisuke Motoda, Yosuke Mizuno
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Incoherent optical frequency domain reflectometry based on a Kerr phase-interrogator
Optics Express, 2014 We present a novel approach for incoherent optical frequency-domain reflectometry based on a frequency-swept sinusoidal optical signal and a Kerr phase-interrogator. The novel approach eliminates dependence on the laser coherence-length allowing for long-range operation. Long-range detection of reflection points as far as 151 km at a spatial-resolution
Colin C Baker, Xiaoyi Bao
exaly +3 more sources
Principle and Application of the C-OTDR
Guangtongxin yanjiu, 2022 The traditional Optical Time Domain Reflectometry (OTDR) technology uses back Rayleigh scattering power for fiber detection. In transmission lines with optical amplifier, Erbium-Doped Fiber Amplifiers (EDFA) are mostly used to compensate for the loss of ...
LIU Zhong-hua +3 more
doaj +3 more sources
Journal of Electronic Science and Technology, 2021 A nonlinearity-compensation-free optical frequency domain reflectometry (OFDR) scheme is proposed and experimentally demonstrated based on the electrically-controlled optical frequency sweep.
Fan Yang +4 more
doaj +1 more source
Analyzing Distributed Vibrating Sensing Technologies in Optical Meshes
Micromachines, 2022 Hundreds of kilometers of optical fibers are installed for optical meshes (OMs) to transmit data over long distances. The visualization of these deployed optical fibers is a highlighted issue because the conventional procedure can only measure the ...
Saifur Rahman +9 more
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