Abstract
Stellar interferometry requires coherent combination of two or more beams from identical telescopes separated by long baselines. This poses high demands on the optical alignment precision and stability. Here, photonic components are particularly useful due to their compact design and their potential to be less sensitive to environmental changes, such as vibrations. Unlike 2D planar photonic beam combiners fabricated using lithographic processes, beam combiners made with ultrafast laser inscription (ULI) can have 3D structures, enabling waveguide designs that do not significantly scale in size with the number of telescopes. A single ULI chip can have multiple beam combiners with different properties, as well as redundancies.
© 2023 IEEE
PDF ArticleMore Like This
A. Benoît, J. Siliprandi, D. G. MacLachlan, C. A. Ross, T. K. Sharma, L. Labadie, K. Madhav, A. S. Nayak, A. N. Dinkelaker, M. M. Roth, E. Pedretti, T. A. ten Brummelaar, N. J. Scott, V. Coudé du Foresto, and R. R. Thomson
jsii_3_4 European Quantum Electronics Conference (EQEC) 2023
A. Arriola, S. Gross, M. Ams, T. Gretzinger, D. Le Coq, R. Wang, H. Ebendorff-Heidepriem, J. Sanghera, S. Bayya, L. B. Shaw, M. Ireland, P. Tuthill, and M. Withford
BT3B.5 Bragg Gratings, Photosensitivity, and Poling in Glass Waveguides (BGPP) 2016
Ahmed Sanny, Simon Gross, Michael Withford, Denis Defrère, and Lucas Labadie
jsii_3_2 European Quantum Electronics Conference (EQEC) 2023