Polarization-insensitive semiconductor optical amplifier array grown by selective MOVPE

Polarization-insensitive 1.3 μm wavelength semiconductor optical amplifier (SOA) arrays are developed for the first time, by using a new fabrication process with selective MOVPE. In a four-channel array, the SOAs have uniform device characteristics of more than 20 dB signal gain and less than 1 dB polarization sensitivity.