REACH EXTENSION IN WDM-PON USING RAMAN PUMP WITH MODULATED DIGITAL SIGNAL

Abstract

Optical fiber access technology is key to realize a broadband communication for everyone, and the passive optical network (PON) is enabling customer to enjoy high-speed internet access now. As the demand for the broadband access is still growing, a study to find out technologies to realize wide bandwidth for the access system is quit important. At this moment, wavelength division multiplexing (WDM) PON is the most promising technology for the future optical fiber access system. Current PON system covers a reach of within 20km from a central office, because the market of the access system is focusing on well-populated area. It is required to extend the reach of the PON system to enhance the applicable area, because there is many region in the world where are not so highly populated. Therefore, this work is focusing on to it compensates for the attenuation of data signal due to SRS cross-talk as well as it helps extending the reach of WDM PON. In order to enhance the reach of the WDM-PON system even though, there are several effect that cause performance degradation of the system by introducing the Raman amplifier. It is important to clarify such effect and to provide solution. Hence, using remote Raman amplification serves two purposes: it compensates for the attenuation of data signal due to SRS cross-talk as well as it helps extending the reach of PON.