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

David Pabœuf; Florian Emaury; Sébastien de Rossi; Arnaud Jérome; Michel Lamare; Raymond Mercier; Gaëlle Lucas-Leclin; Patrick Georges

doi:10.1117/12.854464

27 April 2010 Modal conversion of a phase-locked extended-cavity diode laser array into a single lobe

David Pabœuf, Florian Emaury, Sébastien de Rossi, Arnaud Jérome, Michel Lamare, Raymond Mercier, Gaëlle Lucas-Leclin, Patrick Georges

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Proceedings Volume 7720, Semiconductor Lasers and Laser Dynamics IV; 77200P (2010) https://doi.org/10.1117/12.854464
Event: SPIE Photonics Europe, 2010, Brussels, Belgium

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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David Pabœuf, Florian Emaury, Sébastien de Rossi, Arnaud Jérome, Michel Lamare, Raymond Mercier, Gaëlle Lucas-Leclin, and Patrick Georges "Modal conversion of a phase-locked extended-cavity diode laser array into a single lobe", Proc. SPIE 7720, Semiconductor Lasers and Laser Dynamics IV, 77200P (27 April 2010); https://doi.org/10.1117/12.854464

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KEYWORDS

Diffractive optical elements

Near field

Semiconductor lasers

Diffraction

Diffraction gratings

Fiber Bragg gratings

Binary data

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