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140-Gb/s PS-256-QAM Transmission in an OFDM System Using Kramers–Kronig Detection

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We experimentally demonstrate an orthogonal frequency-division multiplexing (OFDM) system with direct detection. Adopting Kramers–Kronig (KK) detection and probabilistic shaping (PS) technology, 140-Gb/s 256-QAM signal can be successfully transmitted over 25-km… Click to show full abstract

We experimentally demonstrate an orthogonal frequency-division multiplexing (OFDM) system with direct detection. Adopting Kramers–Kronig (KK) detection and probabilistic shaping (PS) technology, 140-Gb/s 256-QAM signal can be successfully transmitted over 25-km standard single-mode fiber (SSMF), which satisfies the normalized generalized mutual information (NGMI) threshold of 0.865. Based on the experimental results, the performance of single-side band (SSB) OFDM signal can be effectively improved with the aid of KK detection and can be further enhanced by the deployed PS method.

Keywords: kronig detection; 256 qam; ofdm system; 140 256; kramers kronig; detection

Journal Title: IEEE Photonics Technology Letters
Year Published: 2019

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