SagnacAssisted Enhanced OTDR for Distributed Acoustic Sensing: A Standardized Benchmark and Engineering Evaluation Framework
Researchers have developed a new Sagnac-assisted enhanced phase-sensitive optical time-domain reflectometry ($\phi$-OTDR) system to improve distributed acoustic sensing (DAS). This architecture addresses performance degradation issues like polarization-induced fading and environmental interference by using a Sagnac interferometer to supplement $\phi$-OTDR data. A standardized benchmark framework was also created to evaluate different event recognition models, with a dual-branch fusion model achieving 89.79% accuracy on a 10-km fiber with six acoustic event classes. AI
IMPACT Introduces a novel sensing architecture and benchmark for acoustic event recognition, potentially improving performance in distributed sensing applications.