INSERTION-LOSS-FREE 1X4 OPTICAL SWITCH FABRICATED USING BANDGAP-ENERGY-CONTROLLED SELECTIVE MOVPE

A 1 x 4 optical switch consisting of a passive 1 x 4 splitter and four laser diode amplifier (SOA) gates was fabricated using higher-pressur e bandgap-energy-controlled selective metal organic vapour phase epita xy (MOVPE). By using this technique, core layers with a low-loss waveg uide of 0.2 dB/mm and an SOA were simultaneously integrated using one- step MOVPE. Insertion-loss-free operation was achieved at a low inject ion current of 58 mA without any additional SOA.