Diamond Diffractive Beam Shapers
At a Glance
Section titled âAt a Glanceâ| Metadata | Details |
|---|---|
| Publication Date | 2019-01-01 |
| Authors | Thibault Wildi, Marcell Kiss, Niels Quack |
| Institutions | Ăcole Polytechnique FĂ©dĂ©rale de Lausanne |
Abstract
Section titled âAbstractâWe demonstrate the design, fabrication and experimental characterization of binary phase transmission Diffractive Optical Elements (DOEs) in Single Crystal Diamond substrates for laser welding applications. Top-hat and arbitrary pattern DOE beam shapers were numerically optimized using an Iterative Fourier Transform Algorithm (IFTA). Both near field and far field beam shapers were computed (the latter forming an image with a lens of f = 20 mm). Commercially available Single Crystal Diamond plates (3 mm x 3mm x 0.3 mm) were patterned using hardmask deposition (Al2O3, α-Si), e-beam lithography and crystallographic diamond etching using O2 plasma. The resulting relief patterns were characterized using scanning electron microscopy (SEM) and atomic force microscopy (AFM). The finished DOE was optically characterized using an optical measurement setup at 532 nm wavelength.
Tech Support
Section titled âTech SupportâOriginal Source
Section titled âOriginal SourceâReferences
Section titled âReferencesâ- 1997 - Diffractive optics for industrial and commercial applications
- 2008 - Beam shaping diffractive optical elements for high power laser applications
- 2018 - Trapezoidal diffraction grating beam splitters in single crystal diamond [Crossref]