Applied Physics B

, Volume 40, Issue 3, pp 133–139 | Cite as

Collective modes — An analytical model for active mode locking in the transient case

  • P. Aechtner
  • A. Laubereau
Contributed Papers


A novel concept is presented for the pulse generation in the linear regime of an actively loss modulated laser. Introducing collective laser modes, the frequency detuning of the modulator and the statistical initial situation of the laser starting from spontaneous emission become tractable. Formation of a mode-locked pulse is described by the selection of collective modes. Perfect mode locking corresponds to the survival of a single mode in the build-up process. A variety of laser properties is derived from the solution and compared with experiment. The model predicts imperfect mode locking (with a finite number of collective modes) in the transient case in agreement with experimental findings.


42.55 Bi 42.60 He 


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Copyright information

© Springer-Verlag 1986

Authors and Affiliations

  • P. Aechtner
    • 1
  • A. Laubereau
    • 1
  1. 1.Physikalisches Institut, UniversitätBayreuthFed. Rep. Germany

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