Beam combiner for the Asgard/BIFROST instrument

Daniel J. Mortimer; Sorabh Chhabra; Stefan Kraus; Narsireddy Anugu; Romain Laugier; Jean-Baptiste Le Bouquin; John D. Monnier

doi:10.1117/12.2629268

26 August 2022 Beam combiner for the Asgard/BIFROST instrument

Daniel J. Mortimer, Sorabh Chhabra, Stefan Kraus, Narsireddy Anugu, Romain Laugier, Jean-Baptiste Le Bouquin, John D. Monnier

Author Affiliations +

Proceedings Volume 12183, Optical and Infrared Interferometry and Imaging VIII; 121831U (2022) https://doi.org/10.1117/12.2629268
Event: SPIE Astronomical Telescopes + Instrumentation, 2022, Montréal, Québec, Canada

Abstract

BIFROST will be a short-wavelength (λ = 1.0 - 1.7 μm) beam combiner for the VLT Interferometer, combining both high spatial (λ/2B = 0.8 mas) and spectral (up to R = 25,000) resolution. It will be part of the Asgard Suite of visitor instruments. The new window of high spectral resolution, short wavelength observations brings with it new challenges. Here we outline the instrumental design of BIFROST, highlighting which beam combiner subsystems are required and why. This is followed by a comparison All-In-One (AIO) beam combination scheme and an Integrated Optics (IO) scheme with ABCD modulation both in terms of expected sensitivity and the practical implementation of each system.

Conference Presentation

Citation Download Citation

Daniel J. Mortimer, Sorabh Chhabra, Stefan Kraus, Narsireddy Anugu, Romain Laugier, Jean-Baptiste Le Bouquin, and John D. Monnier "Beam combiner for the Asgard/BIFROST instrument", Proc. SPIE 12183, Optical and Infrared Interferometry and Imaging VIII, 121831U (26 August 2022); https://doi.org/10.1117/12.2629268

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available