periodic

Physics

Scientists demonstrate advanced low-coherence BOCDR system using periodic pseudorandom modulation

This figure shows the results of distributed strain sensing over a length of approximately 100 m of optical fiber utilizing BOCDR with periodic pseudorandom modulation. The diagram above shows the structure of the sensing fiber, which includes two tightly wound 47-meter sections and a 10-centimeter taut section near the end. The middle plot shows the distributed Brillouin frequency shift along…