Dropout dynamics in pulsed quantum dot lasers due to mode jumping

G. S. Sokolovskii*, E. A. Viktorov, M. Abusaa, J. Danckaert, V. V. Dudelev, E. D. Kolykhalova, K. K. Soboleva, A. G. Deryagin, I. I. Novikov, M. V. Maximov, A. E. Zhukov, V. M. Ustinov, V. I. Kuchinskii, W. Sibbett, E. U. Rafailov, T. Erneux

*Corresponding author for this work

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Abstract

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.

Original languageEnglish
Article number261103
Number of pages5
JournalApplied Physics Letters
Volume106
Issue number26
DOIs
Publication statusPublished - 29 Jun 2015

Keywords

  • linewidth enhancement factor (LEF)
  • Semiconductor-lasers
  • Hair removal
  • Diode-laser
  • Power

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