High-speed beam steering with phased vertical cavity laser arrays

Matthew T. Johnson, Dominic F. Siriani, Meng Peun Tan, Kent D. Choquette

Research output: Contribution to journalArticlepeer-review


We demonstrate electronic beam steering using pha-sed vertical cavity laser arrays at record high speed (1.4·108 deg/s) and sensitivity to current (1.2 deg/100 μA). The relative phase and coherence between the array elements are extracted with a Fraunhoffer propagation method. The spatially resolved spectrum and beam steering dynamics are also analyzed. The thermo-optic effect is found to dominate the phase-shifting mechanism at lower speed steering, while the electronic variation in index dominates at higher speeds (≥10 MHz).

Original languageEnglish (US)
Article number6425397
JournalIEEE Journal on Selected Topics in Quantum Electronics
Issue number4
StatePublished - 2013


  • Beam steering
  • phased arrays
  • semiconductor laser arrays
  • semiconductor lasers

ASJC Scopus subject areas

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


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