Beating noise in narrow-linewidth erbium-doped fiber ring lasers puts severe limitations on applications of the lasers. We demonstrate the suppression of beating noise in fiber ring lasers by using a semiconductor optical amplifier in the laser cavity, which acts as a high-pass filter. Two different ring structures are presented as examples to demonstrate this beating noise suppression.
© 2003 Optical Society of America
Lei Xu, Ivan Glesk, Darren Rand, Varghese Baby, and Paul R. Prucnal, "Suppression of beating noise of narrow-linewidth erbium-doped fiber ring lasers by use of a semiconductor optical amplifier," Opt. Lett. 28, 780-782 (2003)