6×10 Gb/s polarization- and mode-multiplexed transmission without MIMO equalization for data center applications is experimentally demonstrated, over a 200-m elliptical core with two PANDA stress rods few-mode fiber (EP-FMF). This fiber simultaneously breaks the degeneracies of space and polarization in a mode group. A large effective index difference (Δneff=6.6×10-4 ) between adjacent modes among 6-modes is achieved over the entire C band, which translates to lower crosstalk than previous fiber designs. A polarization crosstalk of <-16 dB over 200 m and loss less than 0.63 dB/km were achieved.
Wei Wang, Jian Zhao, Huang Yu, Lin Zhang, Zhiqun Yang, Yichi Zhang, and Guifang Li, "MIMO-free space-division-multiplexing for data center applications," Proc. SPIE 10561, Next-Generation Optical Communication: Components, Sub-Systems, and Systems VII, 105610I (Presented at SPIE OPTO: January 31, 2018; Published: 29 January 2018); https://doi.org/10.1117/12.2295356.
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