WIAS Preprint No. 1584, (2010)

Broadening of mode-locking pulses in quantum-dot semiconductor lasers: Simulation, analysis and experiments


  • Radziunas, Mindaugas
    ORCID: 0000-0003-0306-1266
  • Vladimirov, Andrei G.
    ORCID: 0000-0002-7540-8380
  • Viktorov, Evgeny A.
  • Fiol, Gerrit
  • Schmeckebier, Holger
  • Bimberg, Dieter

2010 Mathematics Subject Classification

  • 78A60 35Q60 35B30

2008 Physics and Astronomy Classification Scheme

  • 42.55.Px, 42.60.Fc, 73.63.Kv, 85.30.De, 85.35.Be


  • mode-locking, semiconductor laser, quantum dots, saturable absorber, pulse broadening, trailing edge




We consider a mode-locked quantum-dot edge-emitting semiconductor laser consisting of a reverse biased saturable absorber and a forward biased amplifying section. To describe the dynamics of this laser we use the traveling wave model taking into account carrier exchange processes between a reservoir and the quantum dots. A comprehensive parameter study is presented and an analysis of mode-locking pulse broadening with an increase of injection current is performed. The results of our theoretical analysis are supported by experimental data demonstrating a strong pulse asymmetry in a monolithic two section quantum dot mode-locked laser.

Appeared in

  • IEEE J. Quantum Electron., (2011) pp. 935-943.

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