학술논문
Six-Telescope Ultrafast Laser Inscribed Beam Combiner for Stellar Interferometry in the J-Band
Document Type
Conference
Author
Source
2023 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC) Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC), 2023 Conference on. :1-1 Jun, 2023
Subject
Language
ISSN
2833-1052
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.