Abstract
A novel few-mode multi-core (FMMC) optical fiber transmission system based on probabilistic shaping (PS) with low complexity multiple-input multiple-output (MIMO) equalization method is proposed and demonstrated in this paper. Compared with the traditional FMMC counterpart, the total bit error rate (BER) is reduced by 3 times after 50km fiber transmission with the optical signal-to-noise ratio (OSNR) in the range of 12 to 20 dB. At a bit error rate of forward error correction (FEC) limit, the optical transmission system proposed in this paper outperforms the traditional one by at least 3dB OSNR improvement. When the OSNR is 20 dB and the BER is lower than the FEC limit, the transmission distance is doubled.
Highlights
The demand for transmission capacity has been increasing exponentially over the last decade, mainly due to the evergrowing Internet traffic
We propose a novel few-mode multi-core (FMMC) optical transmission system based on probabilistic shaping (PS) with low complexity multiple-input multiple-output (MIMO) equalization method
After FMMC fiber transmission, the signals are fed into three mode de-multiplexers (DeMux) through fan-out device
Summary
The demand for transmission capacity has been increasing exponentially over the last decade, mainly due to the evergrowing Internet traffic. The inevitable coupling and differential mode delay require the implementation of multiple-input multiple-output (MIMO) algorithm to equalize the signals at the receiver. A MIMO equalization method based on matrix transformation (MT) is adopted to equalize the mode dispersion and core coupling with lower complexity [7].
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