WDM-PON system based on the laser light injected reflective semiconductor optical amplifier

摘要

This paper proposes a WDM-PON system which uses the laser light injected reflective semiconductor optical amplifier (R-SOA) as the optical transmitter. In the system, optical carrier of laser lights is supplied from the central office (CO) to the R-SOA both in CO and in the subscriber's side. The optical carrier consists of a pair of the perpendicularly polarized laser lights to avoid the polarization dependence of R-SOA. The optical carrier can be shared by several WDM-PON systems to save the cost. We measured the transmission performance of R-SOA which modulates the polarization mixed injection laser at 1.25 Gbps. It is shown that the combined effect of Rayleigh backscatter-ing and the intensity noise induced by the feedback of optical signals into the R-SOA increases the required level of optical injection power into the R-SOA.