Fringe tracking with noisy interferometric data

Donata Bonino; Mario Gai; Leonardo Corcione

doi:10.1117/12.752831

7 June 2007 Fringe tracking with noisy interferometric data

Donata Bonino, Mario Gai, Leonardo Corcione

Proceedings Volume 6603, Noise and Fluctuations in Photonics, Quantum Optics, and Communications; 66032H (2007) https://doi.org/10.1117/12.752831
Event: SPIE Fourth International Symposium on Fluctuations and Noise, 2007, Florence, Italy

Abstract

In ground based interferometric observations, fringe stabilization over long integration times is a mandatory task in order to achieve useful performances even on faint sources. This is done by dedicated instruments which search the maximum of the fringe envelope and consequently correct the optical path of the interfering beams. Localization of the fringe maximum position is corrupted by noise coming both from turbulent atmosphere and instruments. Atmospheric fluctuations are corrected at telescope level, but high frequency disturbance, as well as inter-telescope one, still remain. These residuals must be recognized and separated from the source signal, in order to properly model the instrument behaviour. Moreover, algorithms for fringe tracking must be strong enough to tolerate residual noise and instrument model inaccuracy. We provide some examples of noise performance of both calibration and fringe maximum localization based on laboratory experiments.

Citation Download Citation

Donata Bonino, Mario Gai, and Leonardo Corcione "Fringe tracking with noisy interferometric data", Proc. SPIE 6603, Noise and Fluctuations in Photonics, Quantum Optics, and Communications, 66032H (7 June 2007); https://doi.org/10.1117/12.752831

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