Investigation on the Coexistence of Real-Time DAS System and High-Speed Coherent Optical Signal

The phase optical time-domain reflectometry based on frequency-diversity chirped pulses is demonstrated. The realtime system based on FPGA has realized a sensing distance of over 60km and a spatial resolution of 10m. The coexistence experiment with high-speed coherent optical signals reveals the performance of co-propagation and counter-propagation.