@inproceedings{a26ccec92ac84ddbabc54cf5aded967e,
title = "Gradient-index beam shapers: Fabricated devices and 3D design method",
abstract = "Advances in 3D fabrication have afforded new freedoms in the design of custom optical elements. We explore a design space where the refractive index may vary freely with position in a material by considering applications in coherent beam shaping. First, we will describe experimental results where we have used femtosecond laser writing to fabricate custom GRIN waveguides in a planar geometry. We show a 2D device that converts a Gaussian beam to a flat top in one transverse direction, and is a single-mode waveguide in the other. Second, we describe a numerical method for designing 3D refractive index profiles. As an example, we will use the 3D method to design a device that transforms a circular beam with a Gaussian intensity profile into a square beam with a flat top.",
keywords = "GRIN, Graded index, beam shaping, direct write, mode conversion, multimode waveguides, two-photon lithography",
author = "Kunkel, {W. Minster} and Ali Ghoreyshi and Glen Douglass and Simon Gross and Withford, {Michael J.} and Leger, {James R.}",
year = "2018",
month = jan,
day = "1",
doi = "10.1117/12.2290909",
language = "English (US)",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "SPIE",
editor = "Kudryashov, {Alexis V.} and Ilchenko, {Vladimir S.} and Paxton, {Alan H.}",
booktitle = "Laser Resonators, Microresonators, and Beam Control XX",
address = "United States",
note = "20th Conference on Laser Resonators, Microresonators and Beam Control ; Conference date: 29-01-2018 Through 01-02-2018",
}