The demonstration of <inline-formula><math display="inline" overflow="scroll"><mrow><mn mathvariant="bold">10</mn><mtext> </mtext><mtext> </mtext><mi>Gbit</mi><mo>/</mo><mi mathvariant="normal">s</mi></mrow></math></inline-formula> time division multiplexing and <inline-formula><math display="inline" overflow="scroll"><mrow><mn mathvariant="bold">2.5</mn><mtext> </mtext><mtext> </mtext><mi>Gchip</mi><mo>/</mo><mi mathvariant="normal">s</mi></mrow></math></inline-formula> quasi-synchronous electrical code division multiplexing access passive optical network prototype system

Abstract

The authors propose a novel architecture of passive optical network (PON), which consists of time division multiplexing (TDM) based downstream (10 Gbit/s) and quasi-synchronization (Q-S) electrical code division multiplexing access (ECDMA) based upstream (2.5 Gchip/s), and realize the prototype of this TDM-ECDMA PON. The high speed (2.5 Gchip/s) all digital en/decoding of upstream have been achieved by field-programmable gate array in this prototype. The frames error rate (FER) free transmission of Q-S ECDMA based upstream is demonstrated after 20 km fiber link. Then receiver sensitivity of optical line terminal in upstream transmission can be improved ∼ 6 dB by coding gain compared with traditional 2.5 Gbit/s TDM PON.