Development of the single-mode fiber integral field unit for the RHEA Spectrograph

Adam D. Rains*, Michael J. Ireland, Nemanja Jovanovic, Joao Bento, Tobias Feger, Julien Lozi, Christian Schwab, David W. Coutts, Olivier Guyon, Alexander Arriola, Simon Gross, Jonathan E. Harris

*Corresponding author for this work

    Research output: Chapter in Book/Report/Conference proceedingConference proceeding contributionpeer-review

    8 Citations (Scopus)


    RHEA is a single-mode echelle spectrograph designed to be a replicable and cost effective method of undertaking precision radial velocity measurements. The instrument has a novel fiber feed with an integral field unit injecting into a grid of single-mode fibers reformatted to form a pseudo-slit, increasing throughput and enabling highspatial resolution observations when operating behind Subaru and the SCExAO adaptive optics system. The past 18 months have seen a replacement cable constructed for the instrument to address modal noise caused by closely packed fibers with similar path lengths. Here we detail the cable fabrication procedure, design improvements, increased precision in meeting the required sub-micron optical tolerances, throughput gains, and known remaining issues.

    Original languageEnglish
    Title of host publicationGround-based and Airborne Instrumentation for Astronomy VII
    EditorsChristopher J. Evans, Luc Simard, Hideki Takami
    Place of PublicationBellingham, Washington
    Number of pages11
    ISBN (Electronic)9781510619586
    ISBN (Print)9781510619579
    Publication statusPublished - 6 Jul 2018
    EventGround-based and Airborne Instrumentation for Astronomy VII 2018 - Austin, United States
    Duration: 10 Jun 201814 Jun 2018

    Publication series

    NameProceedings of SPIE
    ISSN (Print)0277-786X
    ISSN (Electronic)1996-756X


    ConferenceGround-based and Airborne Instrumentation for Astronomy VII 2018
    Country/TerritoryUnited States


    • diffraction-limited spectrograph
    • fiber injection
    • high resolution
    • integral field unit
    • optical fibers
    • radial velocity
    • spectrograph


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