
First real-time experimental demonstrations of 1125Gb/s optical OFDMA PONs with adaptive dynamic bandwidth allocation
Author(s) -
Xianqing Jin,
E. Hugues-Salas,
R. P. Giddings,
Jinlong Wei,
J. Groenewald,
J. M. Tang
Publication year - 2011
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.19.020557
Subject(s) - passive optical network , dynamic bandwidth allocation , upstream (networking) , computer science , bandwidth (computing) , electronic engineering , dynamic range , transmission (telecommunications) , optics , symbol rate , real time computing , bit error rate , telecommunications , channel (broadcasting) , physics , wavelength division multiplexing , engineering , wavelength
End-to-end real-time experimental demonstrations are reported, for the first time, of aggregated 11.25Gb/s over 26.4km standard SMF, optical orthogonal frequency division multiple access (OOFDMA) PONs with adaptive dynamic bandwidth allocation (DBA). The demonstrated intensity-modulation and direct-detection (IMDD) OOFDMA PON system consists of two optical network units (ONUs), each of which employs a DFB-based directly modulated laser (DML) or a VCSEL-based DML for modulating upstream signals. Extensive experimental explorations of dynamic OOFDMA PON system properties are undertaken utilizing identified optimum DML operating conditions. It is shown that, for simultaneously achieving acceptable BERs for all upstream signals, the OOFDMA PON system has a >3dB dynamic ONU launch power variation range, and the BER performance of the system is insusceptible to any upstream symbol offsets slightly smaller than the adopted cyclic prefix. In addition, experimental results also indicate that, in addition to maximizing the aggregated system transmission capacity, adaptive DBA can also effectively reduce imperfections in transmission channel properties without affecting signal bit rates offered to individual ONUs.