Comparison of Passive Chromatic Dispersion Compensation Techniques for Long Reach Dense WDM-PON System

摘要

Wavelength Division Multiplexed Passive Optical Network (WDM-PON) is an attractive solution to satisfy the worldwide growing demand for transmission capacity in the future next generation fiber optical access networks. The maximum reach of the Dense WDM-PON (DWDM-PON) transmission system can be severely limited by chromatic dispersion (CD) [1,2]. A cost effective solution for an optical access network is the completely passive long-reach optical access network. The strength of this optical technology is its ability to displace electronics and optical elements in one central office (CO) and simplify the DWDM-PON network architecture [3]. In such a way the access and metro networks can be combined into one network through the use of an extended backhaul fiber, possibly to provide data transmission in length up to 100 km. In traditional Time-Division Multiplexed Passive Optical Network (TDM-PON), the number of ONUs is limited by optical splitter attenuation on single wavelength, but using WDM-PON technology we can provide 16, 32, 64 or even more wavelengths in optical access network [2,4].