82.5GS/s (8×10.3GHz Multi-Phase Clocks) Blind Over-Sampling Based Burst-Mode Clock and Data Recovery for 10G-EPON 10.3-Gb/s/1.25-Gb/s Dual-Rate Operation

Naoki SUZUKI  Kenichi NAKURA  Takeshi SUEHIRO  Seiji KOZAKI  Junichi NAKAGAWA  Kuniaki MOTOSHIMA  

IEICE TRANSACTIONS on Communications   Vol.E101-B   No.4   pp.987-994
Publication Date: 2018/04/01
Publicized: 2017/10/18
Online ISSN: 1745-1345
DOI: 10.1587/transcom.2017OAP0001
Type of Manuscript: Special Section PAPER (Special Section on Optical Access System for Social Life)
10Gb/s-class passive optical network (PON),  burst-mode (BM) optical receiver,  clock and data recovery (CDR),  multi-phase over-sampling,  dual-rate optical receiver,  

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We present an 82.5GS/s over-sampling based burst-mode clock and data recovery (BM-CDR) IC chip-set comprising an 82.5GS/s over-sampling IC using 8×10.3GHz multi-phase clocks and a dual-rate data selector logic IC to realize the 10.3Gb/s and 1.25Gb/s dual-rate burst-mode fast-lock operation required for 10-Gigabit based fiber-to-the-x (FTTx) services supported by 10-Gigabit Ethernet passive optical network (10G-EPON) systems. As the key issue for designing the proposed 82.5GS/s BM-CDR, a fresh study of the optimum number of multi-phase clocks, which is equivalent to the sampling resolution, is undertaken, and details of the 10.3Gb/s cum 1.25/Gb/s dual-rate optimum phase data selection logic based on a blind phase decision algorithm, which can realize a full single-platform dual-rate BM-CDR, ate also presented. By using the power of the proposed 82.5GS/s over-sampling BM-CDR in cooperation with our dual-rate burst-mode optical receiver, we further demonstrated that a short dual-rate and burst-mode preamble of 256ns supporting receiver settling and CDR recovery times was successfully achieved, while obtaining high receiver sensitivities of -31.6dBm at 10.3Gb/s and -34.6dBm at 1.25Gb/s and a high pulse-width distortion tolerance of +/-0.53UI, which are superior to the 10G-EPON standard.