Development of the single-mode fiber integral field unit for the RHEA Spectrograph
Date
2018
Authors
Rains, Adam D.
Ireland, Michael
Jovanovic, Nemanja
Bento, Joao
Feger, Tobias
Lozi, Julien
Schwab, Christian
Coutts, David W.
Guyon, Olivier
Arriola, Alexander
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Society of Photo?Optical Instrumentation Engineers (SPIE)
Abstract
RHEA is a single-mode échelle 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.
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Conference paper
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Proceedings Volume 10702, Ground-based and Airborne Instrumentation for Astronomy VII
Proceedings Volume 10702, Ground-based and Airborne Instrumentation for Astronomy VII
Proceedings Volume 10702, Ground-based and Airborne Instrumentation for Astronomy VII
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Open Access
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