@inproceedings{8bcf249dea1041848e1bf5e9a1cf3e99,
title = "The Asgard/BIFROST pre-injection optics and fibre injection module: optomechanical design \& lab results",
abstract = "The BIFROST instrument is poised to revolutionize high-spectral resolution interferometry at the VLTI by extending the accessible wavelength range down to 1.0 µm, encompassing the Y, J, and H bands. In this paper, we discuss the optical design for BIFROST's pre-injection optics which correct for birefringence effects and longitudinal dispersion between the different beam lines. We present the optomechanical design for the light injection module that compresses the beams and injects them into single-mode fibres, while maintaining the full field-of-view of the VLTI auxiliary or unit telescopes. Our fibre switching module will allow for the injection of light into photonic devices optimised for different wavebands or applications. Finally, we outline our integration \& alignment strategy and present the first characterisation results obtained in the optics lab at the University of Exeter.",
keywords = "ASGARD, BIFROST, Lithium Niobate (LiNbO3) plates, Longitudinal Dispersion Corrector (LDC), VLTI",
author = "Jyotirmay Paul and Daniel Mortimer and Sorabh Chhabra and Daniel Lancaster and Owain Snaith and Sidney Skellett and Arthur Kitching and Stefan Kraus and John Monnier and Michael Ireland",
note = "{\textcopyright} 2024 SPIE.; Optical and Infrared Interferometry and Imaging IX 2024 ; Conference date: 17-06-2024 Through 22-06-2024",
year = "2024",
month = aug,
doi = "10.1117/12.3018779",
language = "English",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "SPIE",
editor = "Jens Kammerer and Stephanie Sallum and Joel Sanchez-Bermudez",
booktitle = "Optical and Infrared Interferometry and Imaging IX",
address = "United States",
}