Stellar interferometry in photon counting regime: experiment on a laboratory prototype

Details Stellar interferometry in photon counting regime: experiment on a laboratory prototype Stellar interferometry in photon counting regime: experiment on a laboratory prototype

Feb 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003spie.4838.1433l&link_type=abstract

Interferometry for Optical Astronomy II. Edited by Wesley A. Traub . Proceedings of the SPIE, Volume 4838, pp. 1433-1439 (2003

Astronomy and Astrophysics

Astronomy

Scientific paper

We report on the experimental validation of the photon noise correction applied on interferometric data, in the frame of an imaging laboratory test using the end-to-end demonstrator "Optical Aperture Synthesis Technologies 2". The light flux is scaled to astronomy level to achieve a quantitative comparison between the contrasts and phase closure measurements simultaneously measured in photon counting regime and in high flux level regime. This experiment uses a three-telescope array linked by optical fiber to the mixing station. We show that it is possible to correct properly the interferometric data with light power levels reaching 1 femto-Watt at a 680 nm mean wavelength. This corresponds to a photon flux close to 2.5 photons per millisecond and to 25 photons for each snap shot.

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