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Abstract
A novel secure passive optical network (PON) configuration jointly based on the chaos synchronization of wavelength division multiplexed (WDM) chaotic signals and the subcarrier modulation multiplexing is introduced. The upstream and downstream carriers consist of a set of wavelength division multiplexed chaotic signals, and each wavelength takes on several bidirectional optical line terminal (OLT)-optical network unit (ONU) transmissions in virtue of the subcarrier modulation multiplexing technology. The numerical results demonstrate that with proper selection of the wavelength spacing, high-quality chaos synchronization can be achieved on each wavelength, and each wavelength can afford several OLT-ONU transmissions by properly allocating the frequency spacing of subcarriers. The proposed scheme can improve the bandwidth utilization efficiency and obviously enhance the information security at the physical layer of the WDM-PON.
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