[7p-N221-1~11] 3.7 Optical measurement, instrumentation, and sensor

1:45 PM - 2:00 PM JST(4:45 AM - 5:00 AM UTC)

[7p-N221-2] Research on improving the performance of optical time domain reflection measurements using asynchronous optical sampling

〇(M2)Hayato Yoshimura¹, Naoki Yamaguchi¹, Sze Y Set², Shinji Yamashita¹ (1.Tokyo Univ., 2.RCAST, Tokyo Univ)

Keywords:

OTDR,optical sampling

Conventional OTDRs have been limited by the bandwidth constraints of optical detectors, restricting the width of usable optical pulses. Even high-resolution systems were limited to approximately 1 cm.To overcome this limitation, a new method has been proposed that enables the sampling of high-speed pulses by performing sampling in the optical domain. In this study, we propose an optical sampling OTDR that can distinguish multiple reflection points over long ranges by introducing a correlation measurement method using PRBS signals in the optical sampling OTDR.