
NTT announced a digital coherent signal processing circuit and optical device that achieves 1.2 Tbps optical transmission at 140 Giga baud.NTT says its proprietary device utilizes a digital coherent detection scheme in which the polarization, amplitude, and phase of light are captured as digital data. The signal distortion that occurs in the optical fiber transmission channel and optoelectronic devices are compensated and equalized through advanced...