Discretely tunable SOA-fiber laser based on few-mode polarization maintaining fiber in Sagnac interferometer

摘要

A discretely tunable fiber ring laser based on a Sagnac interferometer incorporating a few-mode polarization maintaining fiber and semiconductor optical amplifier as the gain media is presented. Nine lasing wavelengths at a tuning step of 2.5 nm is achieved with side-mode suppression ratio over 20 dB.