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First On-Sky Fringes with an Up-Conversion Interferometer Tested on a Telescope Array
P Darré1, R Baudoin1, J-T Gomes1
1Xlim, Photonics Department, UMR CNRS 7252, 123 av. Albert Thomas, 87060 Limoges, France.
Abstract:
The Astronomical Light Optical Hybrid Analysis project investigates the combined use of a telescope array interferometer and nonlinear optics to propose a new generation of instruments dedicated to high-resolution imaging for infrared astronomy. The nonlinear process of optical frequency conversion transfers the astronomical light to a shorter wavelength domain. Here, we report on the first fringes obtained on the sky with the prototype operated at 1.55 μm in the astronomical H band and implemented on the Center for High Angular Resolution Astronomy telescope array. This seminal result allows us to foresee a future extension to the challenging midinfrared spectral domain.
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