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Proceedings Paper

On-sky single-mode fiber coupling measurements at the Large Binocular Telescope
Author(s): Andrew Bechter; Jonathan Crass; Ryan Ketterer; Justin R. Crepp; Robert O. Reynolds; Eric Bechter; Philip Hinz; Fernando Pedichini; Michael Foley; Elliott Runburg; Eleanya E. Onuma; Scott Gaudi; Giuseppina Micela; Isabella Pagano; Charles E. Woodward
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Paper Abstract

The demonstration of efficient single-mode fiber (SMF) coupling is a key requirement for the development of a compact, ultra-precise radial velocity (RV) spectrograph. iLocater is a next generation instrument for the Large Binocular Telescope (LBT) that uses adaptive optics (AO) to inject starlight into a SMF. In preparation for commissioning iLocater, a prototype SMF injection system was installed and tested at the LBT in the Y-band (0.970–1.065 μm). This system was designed to verify the capability of the LBT AO system as well as characterize on-sky SMF coupling efficiencies. SMF coupling was measured on stars with variable airmasses, apparent magnitudes, and seeing conditions for six half-nights using the Large Binocular Telescope Interferometer. We present the overall optical and mechanical performance of the SMF injection system, including details of the installation and alignment procedure. A particular emphasis is placed on analyzing the instrument's performance as a function of telescope elevation to inform the final design of the fiber injection system for iLocater.

Paper Details

Date Published: 27 July 2016
PDF: 11 pages
Proc. SPIE 9909, Adaptive Optics Systems V, 99092X (27 July 2016); doi: 10.1117/12.2233153
Show Author Affiliations
Andrew Bechter, Univ. of Notre Dame (United States)
Jonathan Crass, Univ. of Notre Dame (United States)
Ryan Ketterer, Univ. of Notre Dame (United States)
Justin R. Crepp, Univ. of Notre Dame (United States)
Robert O. Reynolds, Univ. of Arizona (United States)
Eric Bechter, Univ. of Notre Dame (United States)
Philip Hinz, Univ. of Arizona (United States)
Fernando Pedichini, INAF - Osservatorio Astronomico di Roma (Italy)
Michael Foley, Univ. of Notre Dame (United States)
Elliott Runburg, Univ. of Notre Dame (United States)
Eleanya E. Onuma, National Aeronautics and Space Administration (United States)
Scott Gaudi, The Ohio State Univ. (United States)
Giuseppina Micela, INAF - Osservatorio Astronomico G. S. Vaiana (Italy)
Isabella Pagano, INAF - Osservatorio Astrofisico di Catania (Italy)
Charles E. Woodward, Univ. of Minnesota (United States)


Published in SPIE Proceedings Vol. 9909:
Adaptive Optics Systems V
Enrico Marchetti; Laird M. Close; Jean-Pierre Véran, Editor(s)

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