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Phase and amplitude control of a multimode LMA fiber beam by use of digital holography

2009; Optica Publishing Group; Volume: 17; Issue: 15 Linguagem: Inglês

10.1364/oe.17.013000

1094-4087

Mathieu Paurisse, Marc Hanna, F. Druon, Patrick Georges, Cindy Bellanger, A. Brignon, J.-P. Huignard,

Advanced Fiber Laser Technologies

Amplitude and phase control of the output beam of a multimode LMA fiber supporting 4 modes is demonstrated by digital holography in both continuous and ns pulsed regimes at 1064 nm. Our system allows dynamic compensation of beam pointing instabilities, external perturbations introducing low order aberrations and fluctuations of the relative phase of the modes supported by the fiber.