Peta-bit Multidimensional Multiplexing Optical Transmission System Based on Low Coupling Crosstalk Multi-Core Few-Mode Fiber (Invited)

Jianjun Yu; Chen Wang; Bohan Sang; Jianyu Long; Junjie Ding; Ying Wu; Ying Wang; Bo Liu; Xiangjun Xin; Lei Shen

doi:10.3788/AOS250808

Acta Optica Sinica, Volume. 45, Issue 13, 1306028(2025)

Peta-bit Multidimensional Multiplexing Optical Transmission System Based on Low Coupling Crosstalk Multi-Core Few-Mode Fiber (Invited)

Jianjun Yu^1、*, Chen Wang¹, Bohan Sang¹, Jianyu Long¹, Junjie Ding¹, Ying Wu¹, Ying Wang¹, Bo Liu², Xiangjun Xin³, and Lei Shen⁴

Author Affiliations

¹School of Information Science and Technology, Fudan University, Shanghai 200433, China

²School of Electronic and Information Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, Jiangsu , China

³School of Electronic Engineering, Beijing University of Posts and Telecommunication, Beijing 100876, China

⁴Yangtze Optical Fibre and Cable Joint Stock Limited Company, Wuhan 430073, Hubei , China

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Figures & Tables(10)

Fig. 1. Schematic diagram for fabrication process of multi-core few-mode fiber. (a) Cross-sectional diagram of 19-core fiber; (b) cross-sectional image of MC-FMF

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$Refractive index curve along axis of weakly-coupled 19-core fiber$

Fig. 2. Refractive index curve along axis of weakly-coupled 19-core fiber

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$Refractive index curve of graded refractive index six-mode few-mode fiber core$

Fig. 3. Refractive index curve of graded refractive index six-mode few-mode fiber core

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Fig. 4. Experimental setup for Pera-bit multidimensional transmission. (a) Realistic photograph of long transmission system; (b) optical spectrum of 80-channel WDM signal

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Fig. 5. Block diagram for DSP employed at transmitter and receiver

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Fig. 6. Block diagram for MIMO-FDE-DBCPR algorithm

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Fig. 7. BER curves for few-mode signal varying with fiber transmission distance

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Fig. 8. Heatmap of performence of different wavelength channels

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Table 1. Structural parameters of MC-FMF
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Table 1. Structural parameters of MC-FMF
Parameter Loss /（dB/km） Core diameter /μm Core pitch /μm Core crosstalk Cladding diameter /μm
Value 0.206 23.2 44 <-40 dB per 30 km 250

Table 2. Key performance parameters of few-mode fiber core
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Table 2. Key performance parameters of few-mode fiber core
LP mode Loss /（dB/km） Effective area /μm² Dispersion coefficient /（ps·nm^-1·km^-1） Nonlinear coefficient
LP₀₁ 0.208 90 21.25 0.9777
LP₁₁ 0.202 121 21.01 0.7330
LP₂₁ 0.207 159 19.50 0.5789
LP₀₂ 0.205 161 20.29 0.5569

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Jianjun Yu, Chen Wang, Bohan Sang, Jianyu Long, Junjie Ding, Ying Wu, Ying Wang, Bo Liu, Xiangjun Xin, Lei Shen. Peta-bit Multidimensional Multiplexing Optical Transmission System Based on Low Coupling Crosstalk Multi-Core Few-Mode Fiber (Invited)[J]. Acta Optica Sinica, 2025, 45(13): 1306028

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