Record switching throughput of 1.28-Tbit/s/port (64-wavelength × 20-Gbit/s) by DWDM / NRZ-DQPSK optical packet switch system

We first achieved error-free (BER≪10
⁻⁹
) operation of 1.28-Tbit/s/port (64-wavelengths × 20 Gbit/s) DWDM/NRZ-DQPSK optical packet switching and buffering, and demonstrated throughput-scalability could be enhanced by multiplexing and multi-modulation techniques without increase in power consumption.