A Distributed Acoustic Sensor (DAS) is a type of sensor system that utilizes optical fibers for the purpose of detecting and analyzing acoustic signals along the length of the fiber. DAS systems are capable of converting standard optical fibers into arrays of virtual microphones, enabling continuous and distributed monitoring of acoustic events over long distances.

Posts

Distributed Fiber-Optic Sensor as an Acoustic Communication Receiver Array

A novel acoustic transmission technique using distributed acoustic sensors is introduced. By choosing better incident angles for smaller fading and employing an 8- channel beamformer, over 10KB data is transmitted at a 6.4kbps data rate.

OFDM Signal Transmission Using Distributed Fiber-Optic Acoustic Sensing

Acoustic data transmission with the Orthogonal Frequency Division Multiplexing (OFDM) signal has been demonstrated using a Distributed Acoustic Sensor (DAS) based on Phase-sensitive Optical Time-Domain Reflectometry (?-OTDR).

Remote Drone Detection and Localization with Optical Fiber Microphones and Distributed Acoustic Sensing

Remote Drone Detection and Localization with Optical Fiber Microphones and Distributed Acoustic Sensing We demonstrate the first fiber-optic drone detection method with ultra-highly sensitive optical microphones and distributed acoustic sensor. Accurate drone localization has been achieved through acoustic field mapping and data fusion.