We experimentally demonstrate that the stability of cw and mode-locked erbium-doped fiber ring lasers can be improved significantly with a semiconductor optical amplifier (SOA) inside the cavity. The fast saturable gain of the SOA suppresses significantly the self-pulsing that is due to ion pairs in the erbium-doped fiber, which acts as a saturable absorber. A linear stabilization analysis of the laser system agrees with our experimental results.
© 2002 Optical Society of America
(060.2320) Fiber optics and optical communications : Fiber optics amplifiers and oscillators
(140.4050) Lasers and laser optics : Mode-locked lasers
(250.5980) Optoelectronics : Semiconductor optical amplifiers
(270.2500) Quantum optics : Fluctuations, relaxations, and noise
(270.3100) Quantum optics : Instabilities and chaos
Hongmin Chen, Guanghao Zhu, Niloy K. Dutta, and Kevin Dreyer, "Suppression of Self-Pulsing Behavior in Erbium-Doped Fiber Lasers with a Semiconductor Optical Amplifier," Appl. Opt. 41, 3511-3516 (2002)