多芯激励下实际多芯光纤芯间串扰特性研究

doi:10.11959/j.issn.1000-436x.2022211

Abstract

Abstract:

Based on the coupled power theory, the characteristics of optical power and inter-core crosstalk (ICXT) were studied in real multi-core fibers (MCF) with multi-core excitation.According to the simplified coupled power equation of 7-core fiber, the analytical expressions of optical signal power and ICXT in each fiber core were deduced under three multi-core excitation conditions.Simulation results show that, after long-distance transmission, the optical power of each core would converge to a fixed value and reach a dynamic equilibrium state, and its convergence distance decreased exponentially with the increase of bending radius and gradually tended to a fixed value.In addition, in order to study the relationship between multi-core excitation and single-core excitation, the analytical expressions of the power and ICXT in coupled cores were deduced under simultaneous excitation and separate excitation of multi-core.Research shows that the contribution of multi-core excitations to the ICXT of coupled core is irrelevant, and the ICXT of multi-core excitation is equivalent to the sum of the ICXT obtained by the excitation of the cores separately.

Key words: multi-core fiber, inter-core crosstalk, coupled power theory, multi-core excitation, space division multiplexing

CLC Number:

TN913

Lian XIANG, Hongfeng PAN, Shulin JIN, Weidong SHAO. Research on inter-core crosstalk characteristics of real multi-core fibers with multi-core excitation[J]. Journal on Communications, 2022, 43(11): 233-241.

Figures/Tables 12

References 22

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参数	值
纤芯数量	7
纤芯半径/μm	4
纤芯间距/μm	30
包层折射率	1.438 1
纤芯折射率	1.445 3
光波长/nm	1 550
弯曲半径/mm	200
扭转率/(rad·m^-1)	2π
相关长度/m	0.01

Research on inter-core crosstalk characteristics of real multi-core fibers with multi-core excitation

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