Presentation Information

[9p-P03-21]Dual-laser low-coherence BOCDR based on periodic pseudo-random modulation

〇(M1)Ryuki Ohata1, Keisuke Motoda1, Takahiro Ishimaru2, Hiroshi Takahashi2, Kunihiro Toge2, Yosuke Mizuno1 (1.YNU, 2.NTT)

Keywords:

optical fiber sensors,Brillouin scattering,distributed measurement

Brillouin optical correlation-domain reflectometry (BOCDR) is a type of fiber sensor capable of measuring strain and temperature distributions with high spatial resolution. The dual-laser BOCDR employs two lasers for the incident and reference light in the fiber under test, but it faces a trade-off between measurement range and spatial resolution. To address this issue, this study proposes a dual-laser low-coherence BOCDR based on periodic pseudo-random modulation and demonstrates strain distribution measurement using an 11-meter silica fiber.