“光互连”是利用光的波粒二相性与物质相互作用产生的各种现象实现数据，信号传输和交换的理论和技术。简述了其特点、国内外发展概况，物理依据，技术特性以及超型计算机光互连的必要性和可行性。讨论了光互连的若干前沿技术：微机电系统光互连、多级电控全息交叉互连、空分-波分复用联合的广播和选择交换系统在超型机或机群系统中的应用。

The significations of "optical interconnections" are the theory and technology for data and signals transmitting and switching realized by the phenomena of the reciprocity of light wave-particle duality with substance. We summarized its features, the general- purpose in the academia, physical gist, technical property, necessity and feasibility, and discussed some top end technologies in interconnections: micro-electro-mechanical system switches and electroholographic switching used in interconnection, space/wave division multiplexing synchronous broadcast-and-select switch system for supercomputer and clusters.