Abstract
This paper proposes a novel architecture for coherent optical code-division multiple-access passive optical networks (OCDMA-PON). As optical spreading sequences, a recently introduced prime code family hereby referred to as double-padded modified prime code (DPMPC) has been employed and analyzed. The transceivers operate under homodyne dual-balanced detection scheme. For coherent modulation, binary phase-shift keying is employed where the phase is modulated by Mach-Zehnder external phase-modulator. The proposed architecture for optical network units and line terminals are also presented and analyzed. The network scalability of fiber link distances as well as bit-error rate, considering 1) fiber link noise e. g., amplifier spontaneous emission noise; 2) thermal noise; 3) photo-detectors' shot-noise; 4) relative intensity noise; and 5) mainly multiple-access interference, have been investigated. The results have indicated that this architecture can improve the network scalability, capacity and transmission performance, leading to the promising scheme for optical transport networks.
Original language | English |
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Pages (from-to) | 3896-3903 |
Number of pages | 8 |
Journal | Journal of Lightwave Technology |
Volume | 27 |
Issue number | 17 |
DOIs | |
Publication status | Published - 1 Sept 2009 |
Keywords
- Balanced detection
- passive optical network
- optical CDMA
- prime code family
- multiple access interference