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

Emmanuel Longueteau; Laurent Delage; Francois Reynaud

doi:10.1117/12.457130

21 February 2003 Stellar interferometry in photon-counting regime: experiment on a laboratory prototype

Emmanuel Longueteau, Laurent Delage, Francois Reynaud

Proceedings Volume 4838, Interferometry for Optical Astronomy II; (2003) https://doi.org/10.1117/12.457130
Event: Astronomical Telescopes and Instrumentation, 2002, Waikoloa, Hawai'i, United States

Abstract

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.

Citation Download Citation

Emmanuel Longueteau, Laurent Delage, and Francois Reynaud "Stellar interferometry in photon-counting regime: experiment on a laboratory prototype", Proc. SPIE 4838, Interferometry for Optical Astronomy II, (21 February 2003); https://doi.org/10.1117/12.457130

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KEYWORDS

Interferometry

Photon counting

Phase measurement

Sensors

Telescopes

Fringe analysis

Signal detection

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