Secure 2.5Gbit/s, 16-ary OCDM block-ciphering with XOR using a single multi-port en/decoder and its transmission experiment with true clock recovery

Secure 2.5 Gbit/s, 16-ary optical code division multiplexing (OCDM)-based block-ciphering with on-line XOR using a single multi-port optical en/decoder and its 50 km-long fiber transmission with true clock recovery is experimentally demonstrated for the first time.