Noise characteristics of an FM mode-locked erbium fiber ring laser stabilized with a semiconductor optical amplifier in anomalous dispersion or normal dispersion region

摘要

We previously reported that FM mode-locked erbium fiber ring laser could be stabilized with high supermode noise suppression ratio when a semiconductor optical amplifier (SOA) is inserted in the cavity to act as a fast saturable gain medium even in the presence of normal dispersion. In this paper, we further investigate the noise characteristics including relaxation oscillation, timing and energy jitter in both dispersion region when FM mode-locked pulse oscillate in an erbium fiber ring laser with a SOA.