Gradient-index beam shapers: fabricated devices and 3D design method

W. Minster Kunkel; Ali Ghoreyshi; Glen Douglass; Simon Gross; Michael J. Withford; James R. Leger

doi:10.1117/12.2290909

16 February 2018 Gradient-index beam shapers: fabricated devices and 3D design method

W. Minster Kunkel, Ali Ghoreyshi, Glen Douglass, Simon Gross, Michael J. Withford, James R. Leger

Proceedings Volume 10518, Laser Resonators, Microresonators, and Beam Control XX; 105181S (2018) https://doi.org/10.1117/12.2290909
Event: SPIE LASE, 2018, San Francisco, California, United States

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

Citation Download Citation

W. Minster Kunkel, Ali Ghoreyshi, Glen Douglass, Simon Gross, Michael J. Withford, and 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); https://doi.org/10.1117/12.2290909

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