Spatial Coherence and Thermal Lensing in Broad-Area Semiconductor Lasers

James R. O'Callaghan, John Houlihan, Vincent Voignier, Guan H. Wu, Eamonn O'Neill, John G. McInerney, Guillaume Huyet

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)


Injection profiled broad-area edge-emitting semiconductor lasers demonstrate single transverse mode operation and near-diffraction-limited beam output when driven by pulsed pump current. Thermal effects arising from CW operation induce filamentary dynamics, thus degrading the beam. Transition from the stable nonthermal to the unstable CW regime is analyzed experimentally and numerically, and techniques to improve beam quality in the thermal regime, based on feedback or thermal profiling, are proposed.

Original languageEnglish
Pages (from-to)1-9
Number of pages9
JournalIEEE Journal of Quantum Electronics
Issue number1
Publication statusPublished - Jan 2004
Externally publishedYes


  • Gain tailoring
  • High power
  • Semiconductor laser
  • Thermal lensing


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