Suppression of beating noise of narrow-linewidth erbium-doped fiber ring lasers by use of a semiconductor optical amplifier.
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.
Xu
Lei
L
Department of Electrical Engineering, Princeton University, Princeton, New Jersey 08544, USA. leixu@ee.princeton.edu
Glesk
Ivan
I
Rand
Darren
D
Baby
Varghese
V
Prucnal
Paul R
PR