The Asgard/BIFROST pre-injection optics and fiber injection module: optomechanical design and lab results

Jyotirmay Paul; Daniel Mortimer; Sorabh Chhabra; Daniel Lancaster; Owain Snaith; Sidney Skellett; Arthur Kitching; Stefan Kraus; John Monnier; Michael Ireland

doi:10.1117/12.3018779

28 August 2024 The Asgard/BIFROST pre-injection optics and fiber injection module: optomechanical design and lab results

Jyotirmay Paul, Daniel Mortimer, Sorabh Chhabra, Daniel Lancaster, Owain Snaith, Sidney Skellett, Arthur Kitching, Stefan Kraus, John Monnier, Michael Ireland

Author Affiliations +

Proceedings Volume 13095, Optical and Infrared Interferometry and Imaging IX; 1309521 (2024) https://doi.org/10.1117/12.3018779
Event: SPIE Astronomical Telescopes + Instrumentation, 2024, Yokohama, Japan

Conference Poster

Abstract

The BIFROST instrument is poised to revolutionize high-spectral resolution interferometry at the VLTI by extending the accessible wavelength range down to 1.0μm, 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 and alignment strategy and present the first characterisation results obtained in the optics lab at the University of Exeter.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

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Jyotirmay Paul, Daniel Mortimer, Sorabh Chhabra, Daniel Lancaster, Owain Snaith, Sidney Skellett, Arthur Kitching, Stefan Kraus, John Monnier, and Michael Ireland "The Asgard/BIFROST pre-injection optics and fiber injection module: optomechanical design and lab results", Proc. SPIE 13095, Optical and Infrared Interferometry and Imaging IX, 1309521 (28 August 2024); https://doi.org/10.1117/12.3018779

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