The age of optoelectronics is the consequence of rapid evolution and mutual integration of the fields of micro-electronics, laser technology and material science. The appearance of optical fibers and laser diodes in the 1960s, one major contribution of optoelectronic technology to information industry, has led to the advent of optoelectronic communications. In the 1990s, great advances in optoelectronic crystals and breakthroughs in laser diode technology have made all-solid-state lasers a practical realization. As a consequence, this will enable optoelectronics to make its further contribution to more national pillar industries in the first half of the next century, in various aspects like material processing in advanced manufacturing, optical storage in information technology, laser displays in entertainment, laser fusion power station, nuclear fission material processing, upgrading of laser weapons, etc.