Multi-wavelength laser based on SOA and polarization maintaining fiber for WDM systems

In this paper, we have proposed and demonstrated a multi-wavelength laser source based on a semiconductor optical amplifier (SOA) and optical filter module. The optical filter module is composed from a polarizer (P), polarization controller (PC), polarization maintaining fiber (PMF) and mirror. The multi-wavelength laser is generated by constructing SOA and optical filter module in a loop. The output wavelengths are determined by an optical filter module. The Experimental results revealed that a stable multi-wavelength lasing with 0.27 nm wavelength spacing is achieved at room temperature. Moreover, the proposed method is cost effective compared to the previously proposed schemes.