We experimentally investigate the dynamical behavior of a semiconductor las
er with frequency selective optical feedback. We show the existence of bist
ability between two stable outputs. We analyze experimentally the necessary
conditions for bistable behavior. We investigate the appearance of fluctua
tions at low frequency showing that this involves multimode dynamics. We pr
opose a theoretical model for the interpretation of the experimental result
s. (C) 1999 Published by Elsevier Science Ltd. All rights reserved.