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Updated: May 15, 2026
Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator
Published on: January 28, 2019
Experimental demonstration of passive coherent combining of fiber lasers by phase contrast filtering
François Jeux1, Agnès Desfarges-Berthelemot, Vincent Kermène
1XLIM UMR 7252, CNRS–Université de Limoges, 123 Avenue Albert Thomas, 87060 Limoges, France.
Abstract:
We report experiments on a new laser architecture involving phase contrast filtering to coherently combine an array of fiber lasers. We demonstrate that the new technique yields a more stable phase-locking than standard methods using only amplitude filtering. A spectral analysis of the output beams shows that the new scheme generates more resonant frequencies common to the coupled lasers. This property can enhance the combining efficiency when the number of lasers to be coupled is large.
