Open AccessRF-pilot aided modulation format identification for hitless coherent transceiver
Author(s) -
Meng Xiang,
Qunbi Zhuge,
Meng Qiu,
Xinyu Zhou,
Ming Tang,
Deming Liu,
Songnian Fu,
David V. Plant
Publication year - 2017
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.25.000463
Subject(s) - quadrature amplitude modulation , computer science , modulation (music) , phase noise , transceiver , phase modulation , phase shift keying , optics , amplitude modulation , electronic engineering , frequency modulation , telecommunications , radio frequency , physics , bit error rate , decoding methods , wireless , engineering , acoustics
We propose a RF-pilot aided modulation format identification (MFI) technique to enable a hitless flexible coherent transceiver with fast format switching. For the MFI, modulation format information is encoded to the amplitude of the RF-pilot, which can be simultaneously used for the compensation of both laser phase noise and fiber nonlinearity. The proposed MFI technique is able to identify arbitrary modulation formats including multi-dimensional formats and hybrid QAM formats. The high accuracy of the proposed MFI scheme is experimentally demonstrated without sacrificing the tolerance of both laser phase noise and fiber nonlinearity for various modulation formats up to dual-polarization (DP) 64QAM. Finally, over 2240 km standard single mode fiber (SSMF) link, we experimentally demonstrate a hitless coherent transceiver with a fast block-by-block modulation format switching enabled by the proposed MFI.
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