Novel Geometry for an Integrated Channel Selector

A monolithically integrated channel selector with power monitor is proposed in a new reflective configuration. One star coupler, one arrayed waveguide grating, and a minimum number of SOA gates are used to achieve loss free transmission. A 32-channel device controlled by only 12 SOA-gates is realized in InP. Low on-chip losses result in strongly reduced bias currents and an improved signal to noise ratio compared to previously demonstrated devices. The use of SOAs allows for switching in the nanosecond time scale.