Optical communication is based on the carrier of light wave communication. Increased optical bandwidth method has two kinds: increase the fiber single channel transmission rate; the second is a single optical fiber transmission wavelength and the increase in the number of, the wave divided multiplexing (WDM) in fact, optical communication equipment is only suitable for used in the last few kilometers distance.
For optical communication, its technology is mature, and the business demand is relatively insufficient. To be known as the broadband access to the ultimate goal of the FTTH, for example, its implementation technology EPON has been fully mature, but because of the bandwidth required by the general user access is not high, so FTTH is limited to a number of commercial pilot areas. However, in 2006, with the IPTV and other three broadcast services to carry out, the operator provides bandwidth has been unable to meet the requirements of high definition TV users, along with the FTTH deployment is also put on the agenda. Coincidentally, ason for transmission network flexible control, can provide personalized service for enterprise customers, many operators for the development and maintenance of enterprise customers, regardless of the heavily invested in the construction of ASON.
