Concept for fiber-based near-infrared interferometry of highest frequency resolution

E. A. Michael; F. Besser; R. Prado; L. Pallanca

doi:10.1117/12.2057203

24 July 2014 Concept for fiber-based near-infrared interferometry of highest frequency resolution

E. A. Michael; F. Besser; R. Prado; L. Pallanca;

Author Affiliations +

Proceedings Volume 9146, Optical and Infrared Interferometry IV; 914634 (2014) https://doi.org/10.1117/12.2057203
Event: SPIE Astronomical Telescopes + Instrumentation, 2014, Montréal, Quebec, Canada

Abstract

We are presenting first experimental results for subsystems of a low-cost near-infrared heterodyne interferometer concept based on commercial 1.55μm fiber-components with relative phase-stabilization between both telescopes, a shot noise limited heterodyne scheme with ambient temperature operated photodiodes, an ultra-coherent fiber laser, and a ROACH-based correlator. After we worked on a first demonstration with two 14” amateur telescopes on Betelgeuse, the concept should be upgradable to connect mid- or large-class telescopes, also given that the employed fiber phase stabilization scheme will enable the operation of long baselines.

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E. A. Michael, F. Besser, R. Prado, L. Pallanca, "Concept for fiber-based near-infrared interferometry of highest frequency resolution", Proc. SPIE 9146, Optical and Infrared Interferometry IV, 914634 (24 July 2014); doi: 10.1117/12.2057203; https://doi.org/10.1117/12.2057203

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