The turn-on delay jitter of single-mode semiconductor lasers subjected
to optical feedback from a phase-conjugate mirror in short external c
avities is studied. We develop a theory, validated by numerical simula
tions, to obtain the turn-on time distribution. It is shown that the t
urn-on time statistics are highly sensitive to the linewidth enhanceme
nt factor. (C) 1995 Optical Society of America