Phase-Sensitive Optical Time-Domain Reflectometry (Φ-OTDR) is a technique used in fiber-optic sensing to detect and locate changes or disturbances in optical fibers. It enables the monitoring of physical phenomena, such as vibrations or deformations, along the length of an optical fiber. Phase-Sensitive Optical Time-Domain Reflectometry has proven to be a valuable technology in various industries where distributed sensing of dynamic events along optical fibers is required. Its ability to provide high spatial resolution and real-time monitoring makes it well-suited for applications in structural monitoring, security, and environmental sensing.
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.
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).