Listar por tema "Optical time domain reflectometry"
Mostrando ítems 1-6 de 6
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Compensation of phase noise impairments in distributed acoustic sensors based on optical pulse compression time-domain reflectometry
We introduce a method to compensate for the deleterious effects of the phase noise of the laser source on long-range distributed acoustic sensors (DAS) that implement optical pulse compression (OPC). Pulse compression can ... -
Distributed dynamic strain sensing via perfect periodic coherent codes and a polarization diversity receiver
Rayleigh scattering-based dynamic strain sensing with high spatial resolution, fast update rate, and high sensitivity is highly desired for applications such as structural health monitoring and shape sensing. A key issue ... -
Internal modulation of a Random fiber laser
A characterization of a modulated random mirror laser has been experimentally carried out. Unlike conventional internally modulated fiber lasers, no distortion of the modulating frequency or self-mode-locking effects were ... -
Long-range traffic monitoring based on pulse-compression distributed acoustic sensing and advanced vehicle tracking and classification algorithm
We introduce a novel long-range traffic monitoring system for vehicle detection, tracking, and classification based on fiber-optic distributed acoustic sensing (DAS). High resolution and long range are provided by the use ... -
Phase noise effects on phase-sensitive OTDR sensors using optical pulse compression
We introduce a detailed theoretical, numerical, and experimental study of the effects of laser's phase noise on the performance of phase-sensitive optical time-domain reflectometry (-OTDR) sensors that use optical pulse ... -
Spectral shadowing suppression technique in phase-OTDR sensing based on weak fiber Bragg grating array
A postprocessing procedure is presented to suppress spectral shadowing in phase-OTDR sensing systems based on a weak fiber Bragg grating array. A complete theoretical analysis of the interfering signals has been carried ...