Stabilising a nulling interferometer using optical path difference dithering

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dc.creatorGabor, Pavel
dc.creatorChazelas, Bruno
dc.creatorBrachet, Frank
dc.creatorOllivier, Marc
dc.creatorDecaudin, Michel
dc.creatorJacquinod, Sophie
dc.creatorLabèque, Alain
dc.creatorLéger, Alain
dc.date2008-03-31
dc.date.accessioned2026-07-07T09:29:26Z
dc.date.available2026-07-07T09:29:26Z
dc.descriptionContext. Nulling interferometry has been suggested as the underlying principle for the Darwin and TPF-I exoplanet research missions. Aims. There are constraints both on the mean value of the nulling ratio, and on its stability. Instrument instability noise is most detrimental to the stability of the nulling performance. Methods. We applied a modified version of the classical dithering technique to the optical path difference in the scientific beam. Results. Using only this method, we repeatedly stabilised the dark fringe for several hours. This method alone sufficed to remove the 1/ f component of the noise in our setup for periods of 10 minutes, typically. These results indicate that performance stability may be maintained throughout the long-duration data acquisitions typical of exoplanet spectroscopy. Conclusions. We suggest that further study of possible stabilisation strategies should be an integral part of Darwin/TPF-I research and development
dc.identifierhttps://arxiv.org/abs/0803.4438
dc.identifierhttp://arxiv.org/abs/0803.4438
dc.identifierdoi:10.1051/0004-6361:20077830
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/157781
dc.subjectAstrophysics
dc.titleStabilising a nulling interferometer using optical path difference dithering
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