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

Research output: Chapter or section in a book/report/conference proceedingChapter in a published conference proceeding

8 Citations (SciVal)


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
Place of PublicationU. S. A.
ISBN (Print)9781510619579
Publication statusPublished - 1 Jan 2018
EventGround-based and Airborne Instrumentation for Astronomy VII 2018 - Austin, USA United States
Duration: 10 Jun 201814 Jun 2018

Publication series

NameProceedings of SPIE


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


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

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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