[17p-A502-1~16] 3.7 Optical measurement, instrumentation, and sensor (formerly 3.8)

△ [17p-A502-7] Comprehensive theory on OCDR and redefined theoretical spatial resolution

〇Takaki Kiyozumi¹, Tomoya Miyamae¹, Kohei Noda^1,2, Guangtao Zhu¹, Kentaro Nakamura², Yosuke Mizuno¹ (1.YNU, 2.Tokyo Tech)

Keywords:optical correlation-domain reflectometry, optical fiber sensors, Fresnel reflection

Optical correlation-domain reflectometry (OCDR) is a technique for detecting defects in a fiber under test. Several derived OCDR configurations have been developed for downsizing or performance improvement. However, the theory of derived OCDR has not been developed, and the original theory has been applied to the derived OCDR. Hence, there are some inconsistencies between the theory and the experimental results. For example, the theoretical spatial resolution does not agree with the experimental value. In this work, we develop a comprehensive theory for both the original OCDR and derived OCDR configurations, and redefine the theoretical spatial resolution. In addition, we experimentally verify the validity of the modified theory and the redefined resolution.