Abstract

The nonlinear frequency division multiplexing (NFDM) is a promising concept in the field of optical fiber communications. Based on a well established mathematical technique of the nonlinear Fourier transform (NFT), a data modulation scheme has been suggested, which is intrinsically immune to Kerr nonlinearity and chromatic dispersion. However, most NFDM systems still suffer from low values of spectral efficiency due to the large burst sizes and the nonlinear interaction of the signal and the inline amplifier noise. Here, we show that this problem can be partially circumvented by using the Hermite-Gaussian spectral carriers. Using this approach, we are able to report a significantly higher spectral efficiency for NFDM schemes approaching 4.5 bits/s/Hz for a single polarization while keeping the bit error rate of uncoded input below the 7% hard decision forward error correction threshold.

Two-stage artificial neural network-based burst-subcarrier joint equalization in nonlinear frequency division multiplexing systems

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Channel model and the achievable information rates of the optical nonlinear frequency division-multiplexed systems employing continuous b-modulation

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Nonlinear-frequency-packing nonlinear frequency division multiplexing transmission

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Opt. Express 28(10) 15360-15375 (2020)

Improvement for a full-spectrum modulated nonlinear frequency division multiplexing transmission system

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Opt. Express 30(17) 31195-31208 (2022)

Noise equalization scheme based on complex-valued ANN for multiple-eigenvalue modulated nonlinear frequency division multiplexing systems

Xiuhua Lv, Chenglin Bai, Qi Qi, Hengying Xu, Xueyuan Luo, Xinyu Chi, Lishan Yang, and LiXia Xi
Appl. Opt. 61(36) 10755-10765 (2022)