Skew and jitter removal using short optical pulses for optical interconnection

Abstract

We demonstrate data resynchronization in a multichannel chip-to-chip free-space optical interconnect for complementary metal-oxide-semiconductor (CMOS) using short optical pulses. Operation of the system is shown at speeds of 82 Mb/s per channel, limited by the repetition rate of the mode-locked laser used. We show explicitly the ability to resynchronize parallel channels and eliminate timing fluctuations; we remove up to /spl plusmn/3/8 of a bit period of interchannel skew and single channel jitter from the transmitted signals in a complete interconnect link that includes optical transmission, reception, and retransmission of digital data.