@inproceedings{48cbf52c08b04a97b74e90ca8fd65830,
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 = "beam shaping, direct write, Graded index, GRIN, 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 = feb,
day = "16",
doi = "10.1117/12.2290909",
language = "English",
isbn = "9781510615212",
series = "Proceedings of SPIE",
publisher = "SPIE",
pages = "1--8",
editor = "Kudryashov, {Alexis V.} and Paxton, {Alan H.} and Ilchenko, {Vladimir S.}",
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",
}