Abstract

Newly developed 125-μm-cladding coupled four-core fibers realized the record-low spatial mode dispersion (SMD) of 3.14 ± 0.17 ps/√km over C-band and the ultra-low attenuation of 0.158 dB/km at 1550 nm, both of which are the lowest ever reported among the optical fibers for the space-division multiplexed transmission. The SMD was observed to be proportional to the fiber bend curvature, i.e., inversely proportional to the bend radius, and the SMD of 3.14 ± 0.17 ps/√km was measured at the bending radius of ∼31 cm. By assuming the 3.14-ps/√km SMD accumulation, the tap count of the multiple-input multiple-output digital signal processing for the crosstalk compensation is estimated to be only 63 taps for covering 99.99% power of the impulse response after 10 000-km propagation when the 25-GBaud (50-GHz sampling) is assumed. The present results demonstrate the strong applicability of the coupled multicore fiber to the ultralong-haul submarine transmission system.

© 2016 OAPA

Trans-oceanic class ultra-long-haul transmission using multi-core fiber

Itsuro Morita, Koji Igarashi, Hidenori Takahashi, Takehiro Tsuritani, and Masatoshi Suzuki
Opt. Express 22(26) 31761-31773 (2014)

Distributed spatial mode dispersion measurement along strongly coupled multicore fibers based on the correlation analysis of Rayleigh backscattering amplitudes

Shingo Ohno, Kunihiro Toge, Daisuke Iida, and Tetsuya Manabe
Opt. Express 25(24) 29650-29658 (2017)

Design and fabrication of ultra-low crosstalk and low-loss multi-core fiber

Tetsuya Hayashi, Toshiki Taru, Osamu Shimakawa, Takashi Sasaki, and Eisuke Sasaoka
Opt. Express 19(17) 16576-16592 (2011)

Theoretical investigations of weakly- and strongly-coupled multi-core fibers for the applications of optical submarine communications under power and fiber count limits

Lin Sun, Junwei Zhang, Gai Zhou, Bin Chen, Gordon Ning Liu, Yi Cai, Zhaohui Li, Chao Lu, and Gangxiang Shen
Opt. Express 31(3) 4615-4629 (2023)

Long-haul intermodal-MIMO-free MDM transmission based on a weakly coupled multiple-ring-core few-mode fiber

Mingqing Zuo, Dawei Ge, JiaXin Liu, Yuyang Gao, Lei Shen, Xiaobo Lan, Zhangyuan Chen, Yongqi He, and Juhao Li
Opt. Express 30(4) 5868-5878 (2022)