Bifurcations of composite-cavity modes in multi-stripe laser arrays

H Erzgraber, Sebastian Wieczorek, B Krauskopf

Research output: Working paperWorking paper and Preprints

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Abstract

We consider a semiconductor laser device, where the active region consists of parallel stripes in the longitudinal direction. In the composite cavity model, the stripes are coupled via the transversal modes of the entire compound laser device. By calculating the spatial mode profiles we accurately account for the frequency detuning between the modes as well as for the gain and coupling of the individual modes, which are determined by spatial overlap integrals of the mode profiles. In particular, we show the nonlinear dependence of these quantities on the geometry of the laser device. The temporal dynamics of the composite cavity modes are described by corresponding rate equations. Bifurcation analysis of these rate equations, which are coupled to the spatial mode equations, unravels the dynamics of a twin-stripe laser. We identify different locking regions as well as regions with possibly chaotic dynamics.
Original languageEnglish
Publication statusPublished - Mar 2008

Bibliographical note

Sponsorship: This research was supported by Great Western Research Fellowship 18 "Modelling and nonlinear dynamics of optical nanodevices: nanolasers and photonic nanocircuits."

Keywords

  • dynamics and bifurcations
  • coupled lasers
  • photonic lattice
  • composite cavity laser
  • numerical continuation

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