Hisaya Takahashi

20Gbps/ch optical interconnection between SERDES devices over distances from chip-to-chip to rack-to-rack

20-Gbps signal transmission of up to 100 m between two SERDES devices has been demonstrated using newly developed driver and receiver ICs tuned to the characteristics of VCSELs, photodiodes, and electrical transmission line with which they are used.

Development of Alicyclic Polymers for Multimode Waveguide Array and its Characteristics for Use in Optical Interconnection

We have carried out elemental research and development regarding optical transmission technology to establish the petaFLOPS - (1015 floating point number operations per second) class supercomputer. We describe our development of an alicyclic polymer, waveguide arrays formed with the polymer, and their characteristics for multimode optical data transmission. We have also developed high-density optoelectronic modules with a 4.5times4.5times0.5-mm low-temperature co-fired ceramic (LTCC) substrate that transmits 12 signals, and demonstrated a 10-Gbps/ch error-free transmission with the polymeric-waveguide array. We also showed a 20-Gbps/ch optical eye as a transmitter with a 1.1-mum range InGaAs vertical-cavity surface-emitting laser (VCSEL).