WIAS Preprint No. 1790, (2013)

Beam shaping mechanism in spatially modulated edge emitting broad area semiconductor amplifiers



Authors

  • Radziunas, Mindaugas
  • Botey, Muriel
  • Herrero, Ramon
  • Staliunas, Kestutis

2010 Mathematics Subject Classification

  • 35Q60 35B27 37M05 78A60 78A45

Keywords

  • broad area semiconductor amplifiers, periodic modulation, spatial modulation, angular filtering, beam shaping, far field, quality improvement, traveling wave model

Abstract

We investigate beam shaping in broad area semiconductor amplifiers induced by a periodic modulation of the pump on a scale of several microns. The study is performed by solving numerically a (2+1)-dimensional model for the semiconductor amplifier. We show that, under realistic conditions, the anisotropic gain induced by the pump periodicity can show narrow angular profile of enhanced gain of less than one degree, providing an intrinsic filtering mechanism and eventually improving the spatial beam quality.

Appeared in

  • Appl. Phys. Lett., 103 (2013) pp. 132101/1--132101/4.

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