A dual-wavelength erbium-doped fiber laser based on annular cavity

Abstract

A dual-wavelength erbium-doped fiber laser (DW-EDFL) which can output double wavelengths of 1530nm, and 1550nm is proposed in this paper. The optimal condition for optimum output power of two wavelengths is extracted and demonstrated. When the length of EDFL is 4.13m the output power of the two wavelengths can reach 2mW. Additionally, two variable optical attenuators (VOA) are used to balance gain and loss of two signal lights in the ring resonator.