Unitizations of double-ring structure and Erbium-doped waveguide amplifier for stable and tunable fiber laser

Abstract

We propose and demonstrate experimentally a single longitudinal-mode (SLM) fiber double-ring laser using an Erbium-doped waveguide amplifier (EDWA), polarization controller (PC), and a fiber Fabry-Perot tunable filter (FFP-TF) into the ring cavity. In addition the output power side mode suppression ratio (SMSR), and the stabilities of power and wavelength of the laser also are investigated.