Abstract
The effect of core loss imbalance on inter-core crosstalk (XT) is studied theoretically and numerically in long-haul bidirectional uncoupled multi-core fiber transmission. The coupled power equations are solved for two cores with imbalance of loss coefficients, and the solution is used to obtain expressions for direct, indirect, backscattered and bidirectional XT powers. These expressions generalize expressions reported by other authors to arbitrary loss coefficients. It is shown that, in the range of the loss coefficient imbalance from
$-0.04$
dB/km to 0.04 dB/km, the XT powers in decibel show approximately a linear dependence on the loss coefficient imbalance. In that range, differences of the indirect XT power of nearly 1.2 dB relative to the indirect XT power with equal loss coefficients can occur for the larger loss coefficient imbalance; for the direct and backscattered XT powers, the differences are even larger, reaching around 2 dB. These values of 1.2 and 2 dB of difference translate directly to the bidirectional XT power of long-haul 2-core fiber links, in case of dominance of indirect and backscattered XT, respectively.
PDF Article
More Like This
Preparation and transmission characteristics of seven-core few-mode fiber with low loss and low inter-core crosstalk
Pengshuai Shao, Luyao Wang, Yan Wang, Shuguang Li, Zenghui Li, Xiaokai Wang, Liling Ma, Xiaojian Meng, Ying Guo, Jianshe Li, Tonglei Cheng, Yongze Liang, Weiwei Xu, Yu Qin, and Hui Zhou
Opt. Express 30(15) 27746-27762 (2022)
Cited By
You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.
Contact your librarian or system administrator
or
Login to access Optica Member Subscription
Add to BibSonomy