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Extremely high-aspect-ratio ultrafast Bessel beam generation and stealth dicing of multi-millimeter thick glass

Abstract : We report on the development of an ultrafast beam shaper capable of generating Bessel beams of high cone angle that maintain a high intensity hot spot with subwavelength diameter over a propagation distance in excess of 8 mm. This generates a high intensity focal region with extremely high aspect ratio exceeding 10 000:1. The absence of intermediate focusing in the shaper allows for shaping very high energies, up to Joule levels. We demonstrate a proof of principle application of the Bessel beam shaper for stealth dicing of thick glass, up to 1 cm. We expect that this high energy Bessel beam shaper will have applications in several areas of high intensity laser physics.
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https://hal.archives-ouvertes.fr/hal-02382663
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Submitted on : Wednesday, November 27, 2019 - 11:49:58 AM
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  • HAL Id : hal-02382663, version 1

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Rémi Meyer, Luc Froehly, Remo Giust, Jesus del Hoyo, Luca Furfaro, et al.. Extremely high-aspect-ratio ultrafast Bessel beam generation and stealth dicing of multi-millimeter thick glass. Applied Physics Letters, American Institute of Physics, 2019, 114 (201105). ⟨hal-02382663⟩

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