This lecture will review nonlinear interactions and adaptive optics techniques which permit a dynamic correction of beam distortions in solid-state lasers. Applications of these techniques including beam combining to fiber lasers will be also presented. 150-word Biography: Arnaud Brignon received his PhD in 1996 from the Paris University. During his thesis work, he studied nonlinear wave-mixing in laser media for the application of high beam quality solid-state lasers. From 1996 to 2007 he was working on laser beam control including phase conjugation, beam cleanup, beam shaping, beam steering and beam combining, and high-power diode-pumped solid-state lasers. Since 2007, he is head of the Micro and Nano-Physics Laboratory in Thales Research & Technology, Palaiseau, France. He has authored and coauthored more than 150 papers (including some 30 invited and tutorials) on laser beam control in scientific journals and conference proceedings, two books, and 30 patents. In 1996 he received the Fabry-de-Gramont prize from the French Optical Society, in 2000 the Fresnel prize from the European Physical Society, and in 2001 the Technology Review’s Young Innovators Award from the Massachusets Institute of Technology.

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