WIAS Preprint No. 1112, (2006)

Experimental investigations on the suppression of Q-switching in monolithic 40 GHz mode-locked semiconductor lasers


  • Hüttl, Bernd
  • Kaiser, Ronald
  • Kindel, Christian
  • Fidorra, Sybille
  • Rehbein, Wolfgang
  • Stolpe, Heiko
  • Sahin, Gabriel
  • Bandelow, Uwe
    ORCID: 0000-0003-3677-2347
  • Radziunas, Mindaugas
    ORCID: 0000-0003-0306-1266
  • Vladimirov, Andrei G.
    ORCID: 0000-0002-7540-8380
  • Heidrich, Helmut

2010 Mathematics Subject Classification

  • 78A60

2008 Physics and Astronomy Classification Scheme

  • 42.55.Px 42.60.Fc 42.60.Mi 42.60.Gd


  • monolithic semiconductor lasers, mode-locking, Q-switching




Inherent Q-switching as a source of intra-cavity pulse energy modulations, i.e. unwanted amplitude noise, is still a challenging task in order to fabricate monolithic mode-locked semiconductor lasers in view of different commercial applications. In this paper, the results of experimental investigations on the influence of the quantum well number on the occurrence and suppression of Q-switching in 40 GHz mode-locked multiple quantum well buried heterostructure lasers are presented. Improved mode-locked lasers emit short optical pulses (<=1.6 ps) with very low amplitude noise (1-2%) and timing jitter (50-100 fs).

Appeared in

  • Appl Phys. Lett. 88, art. no. 221104, 2006.

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