Fujitsu uses quantum dots to eliminate waveform degradation and significantly reduce noise
Fujitsu Limited and Fujitsu Laboratories Limited today announced the development of the world's first semiconductor optical amplifier (SOA)(1) enabling waveform re-shaping of high-speed optical signals at 40Gbps by using quantum dots(2). Optical technology capable of restoring degradation of optical signals to their original quality without converting them into electronic signals is known as all-optical 3R regeneration(3), consisting of re-amplification, re-shaping, and re-timing. The new SOA accomplishes both re-amplification and re-shaping of optical signals through a single semiconductor device, thereby enabling optical regenerators to become further compact and facilitating higher functionality of future optical networks.