224-Gb/s Carrier-recovery-free Doubly Differential 2ASK-8PSK for Short-reach Optical Networks

Zhang, T., Sanchez, C., Al-khateeb, M., Ali, A., Tan, M., Skvortcov, P., Phillips, I., Sygletos, S. and Ellis, A. (2018). 224-Gb/s Carrier-recovery-free Doubly Differential 2ASK-8PSK for Short-reach Optical Networks. IEEE Photonics Technology Letters ,

Abstract

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.

Publication DOI: https://doi.org/10.1109/LPT.2018.2856401
Dataset DOI: https://doi.org/10.17036/researchdata.aston.ac.uk.00000335
Divisions: Engineering & Applied Sciences > Electrical, electronic & power engineering
Engineering & Applied Sciences
Engineering & Applied Sciences > Institute of Photonics
Additional Information: © 2018 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
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Related URLs: https://ieeexpl ... cument/8411428/ (Publisher URL)
Published Date: 2018-01-01
Published Online Date: 2018-07-16
Authors: Zhang, T. ( 0000-0002-3901-6267)
Sanchez, C. ( 0000-0003-3004-2773)
Al-khateeb, M. ( 0000-0002-1367-6777)
Ali, A.
Tan, M. ( 0000-0002-0822-8160)
Skvortcov, P.
Phillips, I. ( 0000-0002-2776-8939)
Sygletos, S. ( 0000-0003-2063-8733)
Ellis, A. ( 0000-0002-0417-0547)

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