Supermode Switching in Coherently-Coupled Vertical Cavity Surface Emitting Laser Diode Arrays

Nusrat Jahan, William North, Pawel Strzebonski, Kent D. Choquette

Research output: Contribution to journalArticlepeer-review


We report and analyze the supermode switching with current injection found for coherently-coupled dual-element vertical cavity surface emitting laser arrays. The output power, spectral characteristics, and far-field mode profile are measured for a range of bias current operating conditions. The coupling-induced enhanced output power from an in-phase or out-of-phase supermode is confirmed when approximately equal currents are injected into each array element. We observe that the coherent supermode switches from out-of-phase to in-phase supermode with increasing equal current injection. The switching is found to be consistent with coupled mode theory and a 1-dimensional spatial supermode model. The calculated modal gain of the out-of-phase and in-phase array supermodes are consistent with the observed switching of the coherent supermodes.

Original languageEnglish (US)
JournalIEEE Journal of Selected Topics in Quantum Electronics
Issue number1
StatePublished - 2022


  • Optical coupling
  • semiconductor laser arrays
  • vertical-cavity surface emitting lasers (VCSEL)

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering


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