Photonics Research, Volume. 13, Issue 6, 1600(2025)
Non-symmetrical vortex beam shaping in VECSEL laser arrays
Fig. 1. Scheme of a VECSEL. The 1/2-VCSEL gain chip and amplitude mask are placed at the near-field planes of the intracavity telescope. The telescope is formed by two lenses (
Fig. 2. Schematic shapes of the different amplitude-mask patterns, called uniform, point defect, gradient, and random. The hole diameters are not to scale.
Fig. 3. Definition of the mask parameters. This example corresponds to
Fig. 4. (a) Field amplitude
Fig. 5. (a), (c), (e) Modulus and (b), (d), (f) argument of the coupling coefficients between neighboring lasers for the different masks. (a), (b) Uniform and point defect masks studied with
Fig. 6. For two different sets of initial conditions, numerically simulated steady-state phase differences between adjacent lasers for different masks, with
Fig. 7. Intensity (top row) and phase (bottom row) patterns of the phase-locked lasers in a ring array of
Fig. 8. (a) Evolution of the limiting values of the Henry factor versus argument of the coupling coefficient for
Fig. 9. Probabilities for the laser array to exhibit phase-locking with different topological charges
Fig. 10. Probabilities for the laser array to exhibit phase-locking with different topological charges
Fig. 11. Probabilities to obtain topological charge with a specially designed mask satisfying the criteria
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Sopfy Karuseichyk, Ilan Audoin, Vishwa Pal, Fabien Bretenaker, "Non-symmetrical vortex beam shaping in VECSEL laser arrays," Photonics Res. 13, 1600 (2025)
Category: Lasers and Laser Optics
Received: Sep. 23, 2024
Accepted: Mar. 26, 2025
Published Online: May. 26, 2025
The Author Email: Fabien Bretenaker (fabien.bretenaker@universite-paris-saclay.fr)
CSTR:32188.14.PRJ.542842