A high-bandwidth,high-sensitivity fully differential optoelectronic integrated receiver is implemented in a chartered 3.3V standard 0.35μm analog CMOS process. To convert the incident light into a pair of fully differential photo-currents,a novel fully differential photodetector is proposed,which is composed of two completely identical photodiodes. The mea-surement results show that the receiver achieves a 1.11GHz 3dB bandwidth and a -13dBm sensitivity for a 10-12 bit error at 1.5Gb/s data rate under illumination by 850 nm incident lights.
YU Chang-liang MAO Lu-hong XIAO Xin-dong XIE Sheng ZHANG Shi-lin
A standard CMOS optical interconnect is proposed,including an octagonal-annular emitter,a field oxide,metal 1-PSG/BPSG-metal 2 dual waveguide,and an ultra high-sensitivity optical receiver integrated with a fingered P+/N-well/P-sub dual photodiode detector.The optical interconnect is implemented in a Chartered 3.3-V 0.35-μm standard analog CMOS process with two schemes for the research of the substrate noise coupling effect on the optical interconnect performance:with or without a GND-guardring around the emitter.The experiment results show that the optical interconnect can work at 100kHz,and it is feasible to implement optical interconnects in standard CMOS processes.
