[8a-B12-1~11] 3.7 Optical measurement, instrumentation, and sensor

11:30 AM - 11:45 AM JST(2:30 AM - 2:45 AM UTC)

[8a-B12-8] Frequency-Division-Multiplexed Correlation-Domain Reflectometry
for Simultaneous Full-Length and Local Measurements

〇(M2)Soshi Yoshida¹, Takaki Kiyozumi^1,2, Shinji Yamashita¹, Sze Set¹, Yosuke Mizuno² (1.UTokyo, 2.YNU)

Keywords:

Optical fiber sensors,Wavelength-Division-Multiplexed,Optical correlation-domain reflectometry

In this study, frequency-division multiplexing is applied to OCDR by using sinusoidal frequency modulation and PPRM-based frequency modulation as independent measurement channels. This configuration enables the reflection distribution over the entire 50-km FUT to be obtained while simultaneously measuring the reflection structure near the fiber end with high spatial resolution. The proposed method is expected to improve the measurement efficiency and flexibility compared with the conventional approach, in which local measurement is performed after full-length measurement.