The economic success of monolithic optoelectronic and photonic ICs (OEICs, PICs) on InP depends strongly on their cost and performance. Taking into account these requirements as well as today's advanced hybrid integration approaches, the current status of monolithic InP integration technology is reviewed in examples, especially on components suitable for future telecommunication systems.

LiNbO3 switch matrices are attractive devices for small scale optical digital data interchange and service routing. This paper gives an overview on the state of the art of the first generation of photonic switch matrices as well as some future prospects.