InP-based optical system ICs operating at 40 Gbit/s and beyond

InP-based 40-Gbit/s optical system ICs are steadily progressing for the start-up of 40-Gbit/s optical systems. Also, InP-based ICs operating beyond 40 Gbit/s are being investigated for future post-40-Gbit/s optical systems. This paper describes our recent progress on InP-based ICs operating at 40 Gbit/s and beyond, which include optoelectronic (OE) ICs. In testing ICs beyond 40 Gbit/s and toward 100 Gbit/s, the absence of signal sources is becoming a critical issue. 100Gbit/s pulse-pattern generators, which are indispensable for investigating a variety of 100-Gbit/s ICs, are also presented.