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Journal Articles Journal of the Optical Society of America B Year : 2007

Optimization of the focal volume in programmable spatial beam shaping

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Abstract

Programmable spatial beam shaping using phase modulation proved to be an efficient tool for direct and flexible femtosecond laser marking at a Fourier plane of an objective, but not well adapted to deep machining or to photowriting in the bulk of a material. We propose an optimization of the focal volume by use of an additional wavefront correction located in the Fourier plane which compensates in particular the focus component. Theoretical predictions involving non-paraxial scalar diffraction are compared to experimental results obtained with a 100 kHz µJ-range femtosecond laser amplifier. Improvements in the beam characteristics, especially the Rayleigh range and the laser fluence, provided by such an additional wavefront control are underlined.
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Dates and versions

ujm-00180608 , version 1 (19-10-2007)

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  • HAL Id : ujm-00180608 , version 1

Cite

Nicolas Huot, Nicolas Sanner, Eric Audouard. Optimization of the focal volume in programmable spatial beam shaping. Journal of the Optical Society of America B, 2007, 24, pp.2814-2820. ⟨ujm-00180608⟩
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