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.
|Original language||English (US)|
|Title of host publication||Adaptive Optics Systems V|
|Editors||Enrico Marchetti, Jean-Pierre Veran, Laird M. Close|
|State||Published - 2016|
|Event||Adaptive Optics Systems V - Edinburgh, United Kingdom|
Duration: Jun 26 2016 → Jul 1 2016
|Name||Proceedings of SPIE - The International Society for Optical Engineering|
|Other||Adaptive Optics Systems V|
|Period||6/26/16 → 7/1/16|
Bibliographical notePublisher Copyright:
© 2016 SPIE.
- Adaptive Optics
- Fiber Optics
- Large Binocular Telescope
- Single-Mode Fibers