ly 1 / 100,99/100 stand-to mining resources. How to make effective use of the advantage of optical fiber communication bandwidth is the most concern. Therefore, many electronics and based on mature technology has been widely applied to come, reuse tl9000.we reference is successful technology. Theory and practice has proved, by constructing information technology as the recovery of the highway, is an important technology in the past, present and future of optical communication system, and the development of the network, to fully excavate the potential huge transmission capacity of fiber, will play a very important role. In order to better use and recovery in technology, optical wavelength complex technology, light at the OWDM OTDM multiplexing technique, optical code division multiplexing technique OCDMA, optical frequency division multiplexing technique OFDM, light air OSDM multiplexing technique, OSCM multiplexing technique as deputy carrier technology to develop a more in-depth study. One DWDM (DWDM) is today's rapid development, mature technology, it is a kind of technology in a fiber and bolt to send more wavelength signal.