High brightness index-guided parabolic bow-tie laser arrays

F Causa, D Masanotti

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This letter describes a novel 980-nm parabolic bow-tie laser array (PBTLA) that is suitable for high-power and high-brightness operation. Output powers in excess of 2.5 W/facet pulsed in a 1/spl deg/ (lateral) beam, less than twice the diffraction limit, corresponding to 275 MW/spl middot/cm/sup -2//spl middot/sr/sup -1/ brightness, have been measured without the use of external lenses from uncoated PBTLAs fabricated in-house (top metal contact surface area/spl sim/0.1 mm/sup 2/). Experimental results presented in this letter indicate that coherence effects are significant in the operation of such devices. Theoretical models based on the simple diffraction theory and on the coupled-mode theory have been used to interpret the experimental results.
Original languageEnglish
Pages (from-to)2000-2002
Number of pages3
JournalIEEE Photonics Technology Letters
Issue number9
Early online date24 Aug 2004
Publication statusPublished - Sept 2004


  • coherence effects
  • coupled mode analysis
  • lateral beam
  • diffraction theory
  • index guiding
  • light diffraction
  • brightness
  • parabolic bow-tie laser arrays
  • coupled mode theory
  • optical waveguide theory
  • InGaAs-GaAs
  • quantum well material
  • quantum well lasers
  • tapered geometry lasers
  • laser arrays
  • high brightness operation


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