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Optics Letters

Optics Letters


  • Vol. 30, Iss. 12 — Jun. 15, 2005
  • pp: 1479–1481

Programmable focal spot shaping of amplified femtosecond laser pulses

Nicolas Sanner, Nicolas Huot, Eric Audouard, Christian Larat, Jean-Pierre Huignard, and Brigitte Loiseaux  »View Author Affiliations

Optics Letters, Vol. 30, Issue 12, pp. 1479-1481 (2005)

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We describe the programmable spatial beam shaping of 100-kHz, 4-µJ amplified femtosecond pulses in a focal plane by wave-front modulation. Phase distributions are determined by a numerical iterative procedure. A nonpixelated optically addressed liquid-crystal light valve is used as a programmable wave-front tailoring device. Top-hat, doughnut, square, and triangle shapes of 20-µm size are obtained in a focal plane. Their suitability for femtosecond laser machining is demonstrated.

© 2005 Optical Society of America

OCIS Codes
(070.2580) Fourier optics and signal processing : Paraxial wave optics
(140.3300) Lasers and laser optics : Laser beam shaping
(140.7090) Lasers and laser optics : Ultrafast lasers
(230.3720) Optical devices : Liquid-crystal devices

Nicolas Sanner, Nicolas Huot, Eric Audouard, Christian Larat, Jean-Pierre Huignard, and Brigitte Loiseaux, "Programmable focal spot shaping of amplified femtosecond laser pulses," Opt. Lett. 30, 1479-1481 (2005)

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