Performance and cost comparison of extended length WDM-PON

Abstract

Currently there is an effort by system operators to deploy cost effective Passive Optical Networks (PON). In this way, next generation PON is the subject of studies by researchers and system designers. Among them, Wavelength division multiplexing on Passive Optical Network (WDM-PON) are of particular interest once they can provide larger bandwidths. This work presents a comparison of WDM-PON configurations that employ a LED source, a directly modulated laser and a CW Laser with external modulation. Performance data and a cost comparison for the three cases are presented and discussed.

Colourless ONU based on self seed signal RSOA in a WDM-PON

“…This alternative is revealed not to be economically competitive. The use of an incoherent optical source based on LED is an alternative low cost solution, but has a limited reach [6]. There are many options for using a colourless light source in the ONU, like distributed feedback laser diodes (DFB-LDs) or external cavity lasers (ECLs), which can be driven directly or use an external modulator.…”