This presentation gives an overview of optoelectronic devices for future communications and interconnections. Although today's optical communication business is in crisis, the requirement for future broadband communications is strong. One topic in long communications is the world's broadest ultra-dense WDM transmission with 10.9 Tbps. The key devices used in this system, such as DFB laser diodes, optical amplifier, and detectors, will be shown. For metro/access communications, low-cost and high performance devices such as direct modulation laser diodes and high sensitivity detectors that can be applicable to 10G-Ethernet are essential. This talk will also cover optical interconnections for board-board, chip-chip and intra-chip.