# Distributed Vibration Sensing Over 125 km With Enhanced SNR Using Phi-OTDR Over a URFL Cavity

> Research article (Journal of Lightwave Technology, 2015) · cited 92× · AI/ML

**Wikidata**: [openalex:W1975729549](https://www.wikidata.org/wiki/openalex:W1975729549)  
**Source**: https://4ort.xyz/entity/distributed-vibration-sensing-over-125-km-with-enhanced-snr-using-phi-otdr-over-a-urfl-cavity