AlGaInAs based photonic devices for high-speed data transmission

Recent results on 1.3-μm-wavelength directly-modulated lasers (DMLs) and semiconductor optical amplifiers (SOAs) using AlGaInAs multi-quantum well (MQW) active layers are reported. DMLs with the concept of distributed reflector structure provide four 25.8-Gbps lasers on LAN-WDM grid operating at 50°C using the same MQW active layers as well as 40-Gbps modulation at high temperatures. Using an AlGaInAs MQW SOA, a very compact module with low-power-consumption of 0.84W is realized.