TY - JOUR
T1 - Accurate Mode-Coupling Characterization of Low-Crosstalk Ring-Core Fibers using Integral Calculation based Swept-Wavelength Interferometry Measurement
AU - Zhang, Junwei
AU - Zhu, Jiangbo
AU - Liu, Junyi
AU - Mo, Shuqi
AU - Zhang, Jingxing
AU - Lin, Zhenrui
AU - Shen, Lei
AU - Zhang, Lei
AU - Luo, Jie
AU - Liu, Jie
AU - Yu, Siyuan
N1 - Funding information:
National Natural Science Foundation of China (61875233)
Local Innovative and Research Teams Project of Guangdong Pearl River Talents Program (2017BT01X121)
NSFC-Guangdong joint program (U2001601)
National Key RD Program of China (2018YFB1801800)
The Key RD Program of Guangdong Province (2018B030329001)
PY - 2021/10/15
Y1 - 2021/10/15
N2 - In this paper, to accurately characterize the low inter-mode coupling of the weakly-coupled few mode fibers (FMFs), we propose a modified inter-mode coupling characterization method based on swept-wavelength interferometry measurement, in which an integral calculation approach is used to eliminate significant sources of error that may lead to underestimation of the power coupling coefficient. Using the proposed characterization method, a low-crosstalk ring-core fiber (RCF) with low mode dependent loss (MDL) and with single span length up to 100 km is experimentally measured to have low power coupling coefficients between high-order orbital angular momentum (OAM) mode groups of below -30 dB/km over C band. The measured low coupling coefficients based on the proposed method are verified by the direct system power measurements, proving the feasibility and reliability of the proposed inter-mode coupling characterization method.
AB - In this paper, to accurately characterize the low inter-mode coupling of the weakly-coupled few mode fibers (FMFs), we propose a modified inter-mode coupling characterization method based on swept-wavelength interferometry measurement, in which an integral calculation approach is used to eliminate significant sources of error that may lead to underestimation of the power coupling coefficient. Using the proposed characterization method, a low-crosstalk ring-core fiber (RCF) with low mode dependent loss (MDL) and with single span length up to 100 km is experimentally measured to have low power coupling coefficients between high-order orbital angular momentum (OAM) mode groups of below -30 dB/km over C band. The measured low coupling coefficients based on the proposed method are verified by the direct system power measurements, proving the feasibility and reliability of the proposed inter-mode coupling characterization method.
KW - Ring-core fiber (RCF)
KW - power coupling coefficient
KW - swept-wavelength interferometry (SWI)
KW - impulse response
KW - integral calculation
KW - Couplings
KW - Optical fibers
KW - Power measurement
KW - Crosstalk
KW - Optical fiber cables
KW - Optical fiber networks
KW - Extraterrestrial measurements
UR - http://www.scopus.com/inward/record.url?scp=85112611188&partnerID=8YFLogxK
U2 - 10.1109/jlt.2021.3101674
DO - 10.1109/jlt.2021.3101674
M3 - Article
SN - 0733-8724
VL - 39
SP - 6479
EP - 6486
JO - Journal of Lightwave Technology
JF - Journal of Lightwave Technology
IS - 20
ER -