Xh. Wang et al., Spatiotemporal dynamics and high-frequency self-pulsations in two-section distributed feedback lasers, J OPT SOC B, 16(11), 1999, pp. 2030-2039
Ne present a traveling-wave large-signal simulation of the spatiotemporal d
ynamics of two-section distributed feedback lasers, emphasizing the self-pu
lsation phenomenon. For index-coupled lasers, self-pulsation is a result of
the interaction of two modes, each spatially confined primarily to one sec
tion. For partially gain-coupled lasers, self-pulsation is a result of the
interaction of two modes, one that is spatially confined primarily to one s
ection and another that belongs to both sections. The self-pulsation freque
ncy-tuning range and the modulation index of partially gain-coupled lasers
are found to be substantially larger than those of index-coupled lasers. Ex
perimentally, self-pulsation with a frequency-tuning range from 20 to 60 GH
z in two-section partially gain-coupled distributed-feedback; lasers has be
en characterized in the electrical domain. The noise of self-pulsation was
reduced experimentally by optical feedback. (C) 1999 Optical Society of Ame
rica [S0740-3224(99)01811-1].