Coherent beam superposition of ten diode lasers with a Dammann grating

David Paboeuf, Florian Emaury, Sébastien de Rossi, Raymond Mercier, Gaëlle Lucas-Leclin, Patrick Georges

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Abstract

We demonstrate the use of a binary diffractive optical element in a very simple setup to convert the multilobed beam from a low fill factor array of coherent laser diodes into a quasi-Gaussian beam. The phase profile of the grating is determined with a phase retrieval algorithm. Experimentally, the conversion efficiency reaches more than 44%. We also establish that this setup can be used to make an effective measurement of the coherency of the laser array.
Original languageEnglish
Pages (from-to)1515-1517
Number of pages3
JournalOptics Letters
Volume35
Issue number10
DOIs
Publication statusPublished - 15 May 2010

Keywords

  • diffractive optical element
  • multilobed beam
  • laser diodes
  • quasi-Gaussian beam

Cite this

Paboeuf, D., Emaury, F., de Rossi, S., Mercier, R., Lucas-Leclin, G., & Georges, P. (2010). Coherent beam superposition of ten diode lasers with a Dammann grating. Optics Letters, 35(10), 1515-1517. https://doi.org/10.1364/OL.35.001515