Dropout dynamics in pulsed quantum dot lasers due to mode jumping
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We examine the response of a pulse pumped quantum dot laser both experimentally and numerically. As the maximum of the pump pulse comes closer to the excited-state threshold, the output pulse shape becomes unstable and leads to dropouts. We conjecture that these instabilities result from an increase of the linewidth enhancement factor a as the pump parameter comes close to the excitated state threshold. In order to analyze the dynamical mechanism of the dropout, we consider two cases for which the laser exhibits either a jump to a different single mode or a jump to fast intensity oscillations. The origin of these two instabilities is clarified by a combined analytical and numerical bifurcation diagram of the steady state intensity modes.
Sokolovskii , G S , Viktorov , E A , Abusaa , M , Danckaert , J , Dudelev , V V , Kolykhalova , E D , Soboleva , K K , Deryagin , A G , Novikov , I I , Maximov , M V , Zhukov , A E , Ustinov , V M , Kuchinskii , V I , Sibbett , W , Rafailov , E U & Erneux , T 2015 , ' Dropout dynamics in pulsed quantum dot lasers due to mode jumping ' , Applied Physics Letters , vol. 106 , no. 26 , 261103 . https://doi.org/10.1063/1.4923244
Applied Physics Letters
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