Distributed temperature sensors (DTS) based on Raman optical time-domain reflectometry (OTDR) are now
commonly used in a wide range of industries. This paper summarises the state-of-the-art DTS systems, including
recent developments, and describes some important applications.
Arthur H. Hartog,
"Raman sensors and their applications", Proc. SPIE 8421, OFS2012 22nd International Conference on Optical Fiber Sensors, 84210K (17 October 2012); doi: 10.1117/12.974845; https://doi.org/10.1117/12.974845