1000 km Dual‐Mode Transmission with 80 WDM Channels Through Few‐Mode Optical Fiber

Tianqi Zheng; Chen Wang; Kaihui Wang; Junjie Ding; Bowen Zhu; Bohan Sang; Wen Zhou; Lei Shen; Lei Zhang; Ruichun Wang; Changkun Yan; Jianjun Yu

doi:10.3788/CJL230564

Chinese Journal of Lasers, Volume. 50, Issue 23, 2306001(2023)

1000 km Dual‐Mode Transmission with 80 WDM Channels Through Few‐Mode Optical Fiber

Tianqi Zheng¹, Chen Wang¹, Kaihui Wang¹, Junjie Ding¹, Bowen Zhu¹, Bohan Sang¹, Wen Zhou¹, Lei Shen², Lei Zhang², Ruichun Wang², Changkun Yan², and Jianjun Yu^1、*

Author Affiliations

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

²Yangtze Optical Fibre and Cable Joint Stock Limited Company, Wuhan 430073, Hubei , China

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Figures & Tables(12)

$Refractive index distribution of fiber section$

Fig. 1. Refractive index distribution of fiber section

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Fig. 2. Experimental setup diagram and DSP process

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Fig. 3. 4×4 MIMO-TDLMS

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Fig. 4. 8×8 MIMO-FDLMS

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Fig. 5. Spectral diagram before 1000 km transmission

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Fig. 6. Transmission performance under different OSNRs

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Fig. 7. BTB performance for channels C31‒C37

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Fig. 8. BER performance of C30 channel at different transmission distances

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Fig. 9. Constellation diagram after equalization. (a) X polarization LP11a; (b) X polarization LP11b; (c) Y polarization LP11a; (d) Y polarization LP11b

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Fig. 10. Complexity of three algorithms

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Table 1. Fiber parameters

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Table 1. Fiber parameters

Few-mode fiber parameter	Value
Loss /（dB·km^-1）	LP01：0.208；LP11：0.202；LP21：0.207
Differential group delay /（ps·m^-1）	LP01‒LP11：0.4；LP11‒LP21：0.11
Single coil fiber length /km	50
Dispersion coefficient /（ps·nm^-1·km^-1）	LP01：21.25；LP11：21.01；LP21：19.5；LP02：20.29
Effective area /μm²	LP01：90；LP11：121；LP21：159；LP02：161

Table 2. Algorithm complexity comparison
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Table 2. Algorithm complexity comparison
Algorithm MACC
MIMO-TDLMS $C^{2} \times N^{2}$
MIMO-FDLMS 2C（2N×C+log₂N）
MIMO-FTDLMS 2C（2N_FD×C+log₂N_FD）+C²×N $_{T D}^{2}$

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Tianqi Zheng, Chen Wang, Kaihui Wang, Junjie Ding, Bowen Zhu, Bohan Sang, Wen Zhou, Lei Shen, Lei Zhang, Ruichun Wang, Changkun Yan, Jianjun Yu. 1000 km Dual‐Mode Transmission with 80 WDM Channels Through Few‐Mode Optical Fiber[J]. Chinese Journal of Lasers, 2023, 50(23): 2306001

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