Phase-coupled CO2 laser array performance and lossless beam shaping

Gilbert L. Bourdet; Guillaume Lescroart

doi:10.1117/12.344136

7 August 1998 Phase-coupled CO₂ laser array performance and lossless beam shaping

Gilbert L. Bourdet, Guillaume Lescroart

Proceedings Volume 3549, High-Power Lasers: Solid State, Gas, Excimer, and Other Advanced Lasers II; (1998) https://doi.org/10.1117/12.344136
Event: Photonics China '98, 1998, Beijing, China

Abstract

Phase coupling of medium power high beam quality lasers are of great interest for achieving high power diffraction limited beam with high gain lasers. This make it possible to set up compact and efficient sources. In this paper, we review the work performed in our laboratory concerning the coherent array of CO₂ waveguide lasers. We report the various techniques used for phase coupling like Talbot effect, intra-cavity spatial filtering and anti-guiding effect and we give the relevant performances in terms of beam quality and efficiency. After, we discuss the advantages and drawbacks brought by each one. The far field diffraction pattern supplied by a series of coherent independent lasers is made of several asymmetric lobes. We then present lossless techniques making it possible to convert this multilobe asymmetric far field diffraction patterns into a single lobe symmetric beam. Last, we discuss the capability of slab CO₂ laser with a graded-phase mirror cavity for generating large stable mode and, then, improving the energy extraction efficiency.

Citation Download Citation

Gilbert L. Bourdet and Guillaume Lescroart "Phase-coupled CO₂ laser array performance and lossless beam shaping", Proc. SPIE 3549, High-Power Lasers: Solid State, Gas, Excimer, and Other Advanced Lasers II, (7 August 1998); https://doi.org/10.1117/12.344136

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