10-Gb/s WDM-PON transmission using uncooled, directly modulated free-running 1.55-μm VCSELs

We investigate 10-Gb/s uncooled, directly modulated free-running 1.55-mum VCSEL transmission for WDM-PONs. Wavelength variation with bias current and dispersion tolerance are evaluated for WDM-PON transmission. Errorfree transmission over 10-km SMF and 80-km SMF+DCF have been demonstrated.