Spatio-temporal emission dynamics of VCSELs: modal competition in the turn-on behavior

Klaus Becker; Ingo Fischer; Wolfgang ElsaBer

doi:10.1117/12.545883

1 September 2004 Spatio-temporal emission dynamics of VCSELs: modal competition in the turn-on behavior

Klaus Becker, Ingo Fischer, Wolfgang ElsaBer

Proceedings Volume 5452, Semiconductor Lasers and Laser Dynamics; (2004) https://doi.org/10.1117/12.545883
Event: Photonics Europe, 2004, Strasbourg, France

Abstract

We present 2D-spatially and temporally resolved measurements of the emission of selectively oxidized state-of-the-art VCSELs of intermediate aperture sizes, showing their rich modal, polarization, spectral, and spatial dynamics. For the characterization of the repetitive dynamics we performed experiments with a technique we developed called TRIDA (Temporally Resolved Imaging by Differential Analysis) providing a temporal resolution down to 10 ps. From the temporal evolution of the near-field emission we provide a comprehensive overview of the phenomena in the turn-on dynamics. The evolution of the spatial intensity distribution of the transverse modes over a range of some nanoseconds is presented and discussed. Complementary, we have taken single-shot images of the near-field emission of 3ns short pulses in order to characterize the nonrepetitive part of the dynamics and to get a deeper understanding of the dynamical processes arising from the interaction of transverse modes in the turn-on process. We find strong variations in the intensity distribution among the transverse modes and the polarization directions, indicating the onset of spatio-temporal chaos. A correlation analysis for the modal intensities is performed showing the influence of the competition for the available spatial and spectral gain.

Citation Download Citation

Klaus Becker, Ingo Fischer, and Wolfgang ElsaBer "Spatio-temporal emission dynamics of VCSELs: modal competition in the turn-on behavior", Proc. SPIE 5452, Semiconductor Lasers and Laser Dynamics, (1 September 2004); https://doi.org/10.1117/12.545883

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