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We propose and experimentally demonstrate a Brillouin optical correlation domain analysis system adopting time-domain data processing and differential measurement for simultaneous interrogation of multiple sensing points. Continuous probe and pulsed pump waves are simultaneously frequency-modulated by a MHz-order sinusoidal RF wave so that multiple correlation peaks are sequentially generated according...
A Brillouin optical correlation domain analysis (BOCDA) system using the time-domain data processing combined with the differential measurement scheme is proposed, where the measurement range could be effectively enlarged to 10 km while maintaining the high spatial resolution of less than 5 cm by simultaneously interrogating multiple correlation peaks.
A Brillouin optical correlation domain analysis (BOCDA) system using time-domain data processing for concurrently interrogating a plurality of sensing positions is proposed, where the time-domain data processing combined with differential measurement effectively enhances the measurement range and measurement time as much as the spatial resolution of the BOCDA system. In the experiment, the distribution...
We introduce time-domain data processing to an ordinary Brillouin optical correlation domain analysis system for simultaneous interrogation of multiple correlation peaks. In experiment 32 correlation points are simultaneously interrogated in a 320 m optical fiber.
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