Chen Wang, Jianyu Long, Bohan Sang, Bowen Zhu, Peng Li, Kaihui Wang, Wen Zhou, Lei Shen, Jianjun Yu, "Broadband hollow-core NANF transmission utilizing optimal carrier phase estimation for probabilistic shaping constellation," Chin. Opt. Lett. 23, 020604 (2025)
- Chinese Optics Letters
- Vol. 23, Issue 2, 020604 (2025)
Fig. 1. (a) Experimental setup of the 96-channel WDM coherent system. (b) The symbol probability distribution of the generated PS-64QAM with the entropy of 5.2, 5.6, and 5.9. FC/UPC, fiber connector with ultra-physical contact; DP-ICR, dual-polarization integrated coherent receiver.
Fig. 2. (a) Loss and SEM image of the NANF span. (b) The optical spectra of the 96-channel WDM signals with and without 2-km NANF transmission.
Fig. 3. Block diagram of the DSP algorithms employed at the Tx and Rx.
Fig. 4. NGMI curves of the single-channel and 96-channel PS-64QAM-5.9 signals versus the optical launch power over 2-km SSMF and NANF.
Fig. 5. NGMI curves versus the measured OSNR after 2-km NANF transmission with different CPE algorithms at (a) PS-64QAM-5.2, (b) PS-64QAM-5.6, and (c) PS-64QAM-5.9.
Fig. 6. NGMI performance of the WDM PS-64QAM-5.9 signals and the constellation diagrams of the signals at ITU-T C15, C30, and C45.
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Table 1. Complexity of the PCPE, the MPD-BPS, and the MAP-DDCPE
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