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Sapphire Diffractive Axicon milled with Femtosecond Laser Ablation for Imaging Applications
* 1 , 1 , 1 , 1 , 2 , 1
1  Swinburne University of Technology
2  University of Tartu
Academic Editor: Kaupo Kukli

Published: 13 March 2023 by MDPI in Holography Meets Advanced Manufacturing session Advanced Manufacturing posters
Abstract:

We show that a single pulse burst fabrication will produce a flatter and smoother profile of axicons milled on sapphire compared to a pulse overlapped fabrication which will result in a damaged and a much rougher surface. The fabrication of large area (sub-1 cm cross-section) micro-optical components in a short period of time (~ 10 min) and with lesser number of processing steps is highly desirable and cost-effective. Our results were achieved with femtosecond laser fabrication technology which has revolutionized the field of manufacturing axicons. This study shows the manufacture of three configurations such as the conventional axicon, a photon sieve axicon (PSA) and a sparse PSA directly milled onto a sapphire substrate. Debris was removed using IsoPropyl alcohol and potassium hydroxide and amorphous sapphire was redeposited under incoherent illumination to test the components for optical viability. A non-linear optical filter was used for cleaning noisy images which were generated by diffractive optical elements.

Keywords: Femtosecond Ablation; Imaging; Axicon;
Comments on this paper
sofia cole
In the inverse retrieval step, we take super-resolution computational diffraction into consideration. The lens's optical design is an aperture time coding modulator with local light, How to Create a Wikipedia Page?
cuhn cuhnkedrik
When doing the inverse retrieval, we factor in super-resolution computational diffraction. The lens utilizes a local light aperture time coding modulator for its optical design. basketball stars

baron meant
The synthesis of three different configurations, including sparse PSA milled directly on a sapphire substrate, normal axicon, and photon sieved axicon (PSA). The amorphous sapphire was re-deposited under incoherent light to assess the optical viability of the components after debris was eliminated using potassium hydroxide and isopropyl alcohol[url=https://skibidi-toilet.io/]skibidi toilet[/url].
samgfg aliyu
nice work.
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Pauline Cotton
We account for super-resolution computational diffraction during the inverse retrieval. The optical architecture of the lens makes use of a local light aperture time coding modulator.
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