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High-power 2μm diode lasers with asymmetric waveguide

  • Stony Brook University

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

Asymmetric laser heterostructure was developed to improve beam properties of GaSb-based diode lasers emitting near 2 μm. It was demonstrated that the lasers with narrow waveguide and asymmetric claddings could have fast at is beam divergence below 40°. High-power diode lasers with 100-μm-wide output aperture generate more than 1.5W of continuous wave (CW) output power in a beam with fast at is beam divergence of 50°. Power conversion efficiency of the 2 μm emitters peaked at 28%. CW threshold current density of 85 A/cm 2 was achieved at 20 °C. Passively cooled 18-element linear laser arrays generated more than 10W of CW power at 50 A. Above 3W of CW power was obtained from 7-fiber bundle at 7A.

Original languageEnglish
Pages (from-to)1464-1469
Number of pages6
JournalIEEE Journal of Quantum Electronics
Volume46
Issue number10
DOIs
StatePublished - 2010

Keywords

  • Asymmetric waveguide
  • Beam divergence
  • Diode lasers
  • Fiber bundle
  • High power
  • Laser array

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