Low-frequency self-pulsations in asymmetric external-cavity semiconductor lasers due to multiple-feedback effects.
We investigate the dynamical stability of external-cavity semiconductor lasers with deliberate tilt asymmetries. Experimentally observed low-frequency self-pulsations are explained by small-signal analysis based on a new rateequation model that uses a time-dependent effective reflectivity to include multiple-feedback effects. We observe and explain the dependence of the self-pulsation frequency on the strength and degree of asymmetry of the feedback, on the injection current, and on the external-cavity length. These results are important in interpreting instabilities, chaos, and other complex dynamical phenomena in external-cavity semiconductor lasers.
Park
J D
JD
Seo
D S
DS
McInerney
J G
JG
Dente
G C
GC
Osiński
M
M