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Modal conversion of a phase-locked extended-cavity diode laser array into a single lobe

Abstract : Phase-locked operation of an array of ten diode lasers is demonstrated in an extended-cavity using the Talbot self-imaging effect. An output power up to 1.7 W has been obtained. The extracavity coherent conversion of the multilobed array supermode into a Gaussian mode is investigated theoretically based on a binary phase grating. The best configuration results in a conversion efficiency of 83%. Experimentally, the conversion efficiency reaches 50% and is limited by the imperfect coherence of the laser array. We conclude that the conversion setup provides an actual measurement of the power in the selected array supermode.
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Submitted on : Monday, November 15, 2010 - 11:00:38 AM
Last modification on : Wednesday, September 16, 2020 - 5:37:40 PM
Long-term archiving on: : Wednesday, February 16, 2011 - 2:27:36 AM

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David Pabœuf, Florian Emaury, Sébastien de Rossi, Arnaud Jérôme, Michel Lamare, et al.. Modal conversion of a phase-locked extended-cavity diode laser array into a single lobe. Photonics Europe ; Semiconductor Lasers and Laser Dynamics IV, Apr 2010, Bruxelles, Belgium. pp.77200P 1 -77200P 7, ⟨10.1117/12.854464⟩. ⟨hal-00534755⟩

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