TY - JOUR
T1 - OTDR enabled multiple-loopback measurement of inter-core crosstalk in MCF
AU - Zhao, Xuesong
AU - Bo, Tianwai
AU - Tan, Zhongwei
AU - Dong, Yi
N1 - Publisher Copyright:
© 1983-2012 IEEE.
PY - 2024
Y1 - 2024
N2 - As a fundamental limiting factor in the space division multiplexing (SDM) system based on weakly coupled multi-core fiber (MCF), inter-core crosstalk (IC-XT) requires measuring conveniently and efficiently during MCF deployment. In this paper, we propose an effective IC-XT measurement method based on optical time domain reflectometer (OTDR). By connecting the designed bridge single-mode fibers (SMFs) structure at the beginning end of the MCF and launching optical pulse signal into one core under test at the far end, multiple loopback IC-XT peaks can be read on the OTDR, from which the IC-XT levels from the core under test to all other cores can be simultaneously calculated. Two bridge schemes for IC-XT measurement are proposed and experimentally verified on a 41 km 7-core fiber. The first scheme supports bidirectional IC-XT measurement, while the second performs better in the OTDR dynamic range and computational complexity. Both schemes demonstrate good measurement accuracy, with < 1dB of errors. We believe that the proposed method will certainly provide convenient and efficient IC-XT evaluation during future MCF deployment.
AB - As a fundamental limiting factor in the space division multiplexing (SDM) system based on weakly coupled multi-core fiber (MCF), inter-core crosstalk (IC-XT) requires measuring conveniently and efficiently during MCF deployment. In this paper, we propose an effective IC-XT measurement method based on optical time domain reflectometer (OTDR). By connecting the designed bridge single-mode fibers (SMFs) structure at the beginning end of the MCF and launching optical pulse signal into one core under test at the far end, multiple loopback IC-XT peaks can be read on the OTDR, from which the IC-XT levels from the core under test to all other cores can be simultaneously calculated. Two bridge schemes for IC-XT measurement are proposed and experimentally verified on a 41 km 7-core fiber. The first scheme supports bidirectional IC-XT measurement, while the second performs better in the OTDR dynamic range and computational complexity. Both schemes demonstrate good measurement accuracy, with < 1dB of errors. We believe that the proposed method will certainly provide convenient and efficient IC-XT evaluation during future MCF deployment.
KW - Inter-core crosstalk
KW - multi-core fiber
KW - optical time domain reflectometry
KW - space division multiplexing
UR - http://www.scopus.com/inward/record.url?scp=85210097440&partnerID=8YFLogxK
U2 - 10.1109/JLT.2024.3504272
DO - 10.1109/JLT.2024.3504272
M3 - Article
AN - SCOPUS:85210097440
SN - 0733-8724
JO - Journal of Lightwave Technology
JF - Journal of Lightwave Technology
ER -