We propose and experimentally demonstrate a carrier-recovery-free 224-Gb/s dual-polarization doubly differential (DD) two-amplitude/eight-phase shift keyed (2ASK- 8PSK) signal for 100-km fiber transmission with coherent detection. An 11-tap multi-symbol DD (MSDD) decoding scheme helps reduce the penalty caused by two differential operations in conventional DD decoding, allowing an optical signal-to-noiseratio (OSNR) improvement of 3.7 dB for DD QPSK and 4.3 dB for DD 16QAM. By employing such decoding, a frequency offset (FO) tolerance of 16 GHz has been achieved in a DD 2ASK-8PSK system for a BER of ~1×10-3. Compared with a 224-Gb/s 16QAM system employing conventional carrier recovery algorithms, the proposed system is more robust to FOs, and the FO tolerance range is only limited by the effective receiver bandwidth.
|Pages (from-to)||1463 - 1466|
|Journal||IEEE Photonics Technology Letters|
|Early online date||16 Jul 2018|
|Publication status||Published - 15 Aug 2018|
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224-Gb/s Carrier-recovery-free Doubly Differential 2ASK-8PSK for Short-reach Optical Networks
Zhang, T. (Creator), Sanchez Costa, C. (Creator), Al-Khateeb, M. A. Z. (Creator), Ali, A. (Creator), Skvortcov, P. (Creator), Tan, M. (Creator), Phillips, I. (Creator), Sygletos, S. (Creator) & Ellis, A. (Creator), Aston Data Explorer, 7 Mar 2018
DOI: 10.17036/researchdata.aston.ac.uk.00000335, https://ieeexplore.ieee.org/document/8411428