Dropout dynamics in pulsed quantum dot lasers due to mode jumping

Journal Article · Mon Jun 29 00:00:00 EDT 2015 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4923244· OSTI ID:22483105

Sokolovskii, G. S.; Dudelev, V. V.; Deryagin, A. G.; Novikov, I. I.; Maximov, M. V.; Ustinov, V. M.; Kuchinskii, V. I. ^[1]; Viktorov, E. A. ^[2]; Abusaa, M. ^[3]; Danckaert, J. ^[3]; Kolykhalova, E. D. ^[4]; Soboleva, K. K. ^[5]; Zhukov, A. E. ^[6]; Sibbett, W. ^[7]; Rafailov, E. U. ^[8]; Erneux, T. ^[9]

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1. Ioffe Physical-Technical Institute, St. Petersburg (Russian Federation)
2. National Research University of Information Technologies, Mechanics and Optics, Saint Petersburg (Russian Federation)
3. Applied Physics Research Group (APHY), Vrije Universiteit Brussel, Pleinlaan 2, B-1050 Brussels (Belgium)
4. St. Petersburg State Electrotechnical University “LETI,” St. Petersburg (Russian Federation)
5. St. Petersburg State Polytechnical University, St. Petersburg (Russian Federation)
6. Academic University, St. Petersburg (Russian Federation)
7. University of St. Andrews, St. Andrews (United Kingdom)
8. Aston Institute of Photonic Technologies, Aston University, Birmingham (United Kingdom)
9. Optique Nonlinéaire Théorique, Campus Plaine CP 231, 1050 Bruxelles (Belgium)

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 α 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.

• OSTI ID: 22483105
• Journal Information: Applied Physics Letters, Vol. 106, Issue 26; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BIFURCATION
DIAGRAMS
INSTABILITY
LASERS
ORIGIN
OSCILLATIONS
PULSE SHAPERS
PULSES
PUMPS
QUANTUM DOTS