A 100-km BOFDA Assisted by First-Order Bi-Directional Raman Amplification

Sensors

Andy Schreier¹  Thomas Kapa¹  Katerina Krebber¹ 

[1] Bundesanstalt für Materialforschung und -prüfung, Unter den Eichen 87, 12205 Berlin, Germany;

关键词: distributed Brillouin sensing;    distributed temperature and strain sensing;    BOFDA;    stimulated Brillouin scattering;    fiber optics sensors;   

DOI  :  10.3390/s19071527

来源: DOAJ

【 摘 要 】

We present, to our knowledge for the first time, a 100-km Brillouin Optical Frequency-Domain Analysis (BOFDA) employing a 200-km fiber loop. Compared to our previous publication, enhanced sensor length, sensor accuracy and spatial resolution are presented. The performance improvements are achieved by applying distributed Raman amplification (DRA) and a digital high-pass filter. We report on temperature measurements over sensing distances of 75 km and 100 km both with a 12.5-m spatial resolution. Temperature changes of 5 $°$ C have been measured along 75 km sensing fiber. A temperature change of 30 $°$ C has been detected at 99.5 km.

【 授权许可】

Unknown