Ultra-fast photonic networks based on optical code-division multiplexing

Ultra-fast photonic networks based on optical codedivision multiplexing (OCDM) are reviewed. The demonstrated applications of OCDM are as follows: 1) high spectral efficiency transport system (1.6 bit/s/Hz, 6.4 Tbit/s QPSK-OCDM/WDM transmission experiment), 2) photonic access node (10 Gbit/s packet-selective photonic label-based add/drop multiplexing), 3) optical path networks (transparent virtual optical code/wavelength path network with optical code and wavelength-convertible nodes), 4) photonic routing (optical-code-correlation-based ultra-fast photonic routing).