A novel passive optical network (PON) over optical code division multiple access (OCDMA) uplink based on the
differential quadrature reference phase shift keying (DQPSK)/ on-off Keying (OOK) orthogonal re-modulation and time
domain phase coherent OCDMA en/decoder scheme has been proposed. The bit error rate and receiver sensitivity of the
system have been investigated, and the security performance and MAI (Multi Access Interference) property of the
OCDMA uplink data have also been investigated. The results show that the proposed PON system is more cost-effective
with less power penalty, and the capacity and security of upstream data can be greatly improved .
Two time-stacked spectral amplitude code (SAC) labels have been demonstrated by simulation to be recognized by
filtering their own corresponding unique four wave mixing (FWM) tones in the forwarding nodes which are converted to
be an electrical signal to control the routing direction of the packets. In this scheme, the payload does not need to be
delayed by a strict time slot and it can not be chopped by the time gating signal so that the useful data is prevented being
lost. The forwarding of the whole packet for two nodes and an error-free (bit-error rate< 10-9) 100 km single-mode fiber
(SMF) transmission have been implemented with 0.1-dBm and 0.3-dBm power penalties in the first and second forwarding nodes, respectively, which shows an essential transmission performance.
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