Beam steering in narrow-stripe high-power 980-nm laser diodes

W. D. Herzog*, B. B. Goldberg, M. S. Ünlü

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

We used near-field scanning optical microscopy to measure the optical beam characteristics of weakly-guided narrow-stripe high-power laser diodes. For both facets of the device, we correlate changes in the near-field optical characteristics with beam steering and the kink in the light output versus operating current curve. Our measurements demonstrate that: 1) frequency-locking of lateral modes exists for operating currents below the kink in the L-I curve; 2) beam steering is a result of a shift of in the beat-length pattern inside the laser cavity of the frequency-locked lateral modes; and 3) the kink in the L-I curve results from a sudden increase in the beam waist of the guided-modes.

Original languageEnglish (US)
Pages (from-to)1604-1606
Number of pages3
JournalIEEE Photonics Technology Letters
Volume12
Issue number12
DOIs
StatePublished - Dec 1 2000

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering

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