DOAJ Open Access 2023

Imaging with Diffractive Axicons Rapidly Milled on Sapphire by Femtosecond Laser Ablation

Daniel Smith Soon Hock Ng Molong Han Tomas Katkus Vijayakumar Anand +1 lainnya

Abstrak

We show that single-pulse burst fabrication will produce a flatter and smoother profile of axicons milled on sapphire compared to pulse overlapped fabrication which results in a damaged and 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 less processing steps is highly desirable and would be cost-effective. Our results were achieved with femtosecond laser fabrication technology which has revolutionized the field of advanced manufacturing. This study compares three configurations of axicons such as the conventional axicon, a photon sieve axicon (PSA) and a sparse PSA directly milled onto a sapphire substrate. Debris of redeposited amorphous sapphire were removed using isopropyl alcohol and potassium hydroxide. A spatially incoherent illumination was used to test the components for imaging applications. Non-linear reconstruction was used for cleaning noisy images generated by the axicons.

Topik & Kata Kunci

Engineering machinery, tools, and implements

Penulis (6)

Daniel Smith

Soon Hock Ng

Molong Han

Tomas Katkus

Vijayakumar Anand

Saulius Juodkazis

Format Sitasi

APA MLA BibTeX

Smith, D., Ng, S.H., Han, M., Katkus, T., Anand, V., Juodkazis, S. (2023). Imaging with Diffractive Axicons Rapidly Milled on Sapphire by Femtosecond Laser Ablation. https://doi.org/10.3390/HMAM2-14147

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Informasi Jurnal

Tahun Terbit: 2023
Sumber Database: DOAJ
DOI: 10.3390/HMAM2-14147
Akses: Open Access ✓