[19p-Z05-1~13] 3.14 Optical control devices and optical fibers

▲ [19p-Z05-9] Measurement error compensation in BOCDR by two-end light injection

〇Guangtao Zhu¹, Kohei Noda^1,2, Heeyoung Lee³, Kentaro Nakamura², Yosuke Mizuno¹ (1.YNU, 2.Tokyo Tech, 3.SIT)

Keywords:optical fiber sensors, distributed strain sensing, Brillouin scattering

To suppress the systematic error caused by the AM-FM phase delay in Brillouin optical correlation-domain reflectometry (BOCDR), we propose a new configuration called two-end light injection. Although BOCDR operates by light injection to a single end of the sensing fiber, in this configuration, we intentionally inject light also to the other end, perform the same distributed measurements in both directions, and combine the obtained results to mitigate the error.