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 .
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