Optical communication is the physical basis of the entire Internet economy. The beginning of the century, the Internet bubble crisis, the optical communication industry closely related also suffered heavy losses, optical communications giant great loss of strength, Nortel, Lucent since almost brought to its knees. That time foreign optical communications giants are mostly vertically integrated development model, from device to device chips are able to completely independent research and design. After the bubble crisis, in order to preserve the core competitiveness, equipment manufacturers have stripped optical components businesses to form an independent company, or sold to independent manufacturers of optical devices, optical fiber business has been stripped. Optical Communication born light system equipment - fiber-optic cable - optical devices - optical chips complete industrial ecology.