16 February 2018 Gradient-index beam shapers: fabricated devices and 3D design method
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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.
Conference Presentation
© (2018) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
W. Minster Kunkel, W. Minster Kunkel, Ali Ghoreyshi, Ali Ghoreyshi, Glen Douglass, Glen Douglass, Simon Gross, Simon Gross, Michael J. Withford, Michael J. Withford, James R. Leger, James R. Leger, } "Gradient-index beam shapers: fabricated devices and 3D design method", Proc. SPIE 10518, Laser Resonators, Microresonators, and Beam Control XX, 105181S (16 February 2018); doi: 10.1117/12.2290909; https://doi.org/10.1117/12.2290909
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