Fiber optic distributed temperature sensing systems (DTS) are valuable tools used for a broad range of applications, including the monitoring of hydrologic systems and power cables, and the detection of pipeline leaks. In many fiber optic DTS systems, a dual-ended configuration can correct the temperature measurement error associated with wavelength dependent loss (WDL) of the optical fiber. This design can also provide a more accurate temperature measurement when compared with a single-ended fiber system.

Xiaoguang Sun, David T. Burgess, Kyle Bedard, Jie Li and Mike Hines of Lightera recently presented a white paper on this subject at the 2015 SPIE Defense, Security and Sensing Conference. This paper focuses on their research findings when a miniature-turnaround device built with a short section of a graded index (GI) fiber is used. To read more, please go HERE.