The Large Fiber Array Spectroscopic Telescope: fiber feed and spectrometer conceptual design

Chad F. Bender; J. Roger Angel; Joel Berkson; Peter Gray; Samuel Halverson; Hyukmo Kang; Daewood Kim; Andy Monson; Chang Jin Oh; Matthew Rademacher; Christian Schwab; Andrew Young; Dennis Zaritsky

doi:10.1117/12.2628710

29 August 2022 The Large Fiber Array Spectroscopic Telescope: fiber feed and spectrometer conceptual design

Chad F. Bender, J. Roger Angel, Joel Berkson, Peter Gray, Samuel Halverson, Hyukmo Kang, Daewood Kim, Andy Monson, Chang Jin Oh, Matthew Rademacher, Christian Schwab, Andrew Young, Dennis Zaritsky

Author Affiliations +

Proceedings Volume 12184, Ground-based and Airborne Instrumentation for Astronomy IX; 121844J (2022) https://doi.org/10.1117/12.2628710
Event: SPIE Astronomical Telescopes + Instrumentation, 2022, Montréal, Québec, Canada

Conference Poster

Abstract

The Large Fiber Array Spectroscopic Telescope, LFAST, will use optical fibers to combine light from thousands of small telescopes at centrally located high-resolution spectrometers. LFAST aims to use mass replication of small, self-contained telescope systems to provide ELT sized collecting area and spectroscopic capabilities at a drastically reduced price. However, fundamental constraints such as étendue, fiber modal noise, and focal-plane sampling that affect the size and complexity of spectrometers for single telescope ELTs also impact LFAST. We are carrying out a three year study to tackle these challenges. In this paper, we describe the conceptual designs for the fiber feed assemblies that carry light from the individual telescopes to a centralized location, and the high-resolution spectrometer that accepts this light.

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Chad F. Bender, J. Roger Angel, Joel Berkson, Peter Gray, Samuel Halverson, Hyukmo Kang, Daewood Kim, Andy Monson, Chang Jin Oh, Matthew Rademacher, Christian Schwab, Andrew Young, and Dennis Zaritsky "The Large Fiber Array Spectroscopic Telescope: fiber feed and spectrometer conceptual design", Proc. SPIE 12184, Ground-based and Airborne Instrumentation for Astronomy IX, 121844J (29 August 2022); https://doi.org/10.1117/12.2628710

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