Share Email Print
cover

Proceedings Paper

PERSEE: experimental results on the cophased nulling bench
Author(s): J. Lozi; F. Cassaing; J. M. Le Duigou; K. Houairi; B. Sorrente; J. Montri; S. Jacquinod; J.-M. Rees; L. Pham; E. Lhome; T. Buey; F. Hénault; A. Marcotto; P. Girard; N. Mauclert; M. Barillot; V. Coudé du Foresto; M. Ollivier
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

Nulling interferometry is still a promising method to characterize spectra of exoplanets. One of the main issues is to cophase at a nanometric level each arm despite satellite disturbances. The bench PERSEE aims to prove the feasibility of that technique for spaceborne missions. After a short description of PERSEE, we will first present the results obtained in a simplified configuration: we have cophased down to 0.22 nm rms in optical path difference (OPD) and 60 mas rms in tip/tilt, and have obtained a monochromatic null of 3 · 10-5 stabilized at 3•10-6. The goal of 1 nm with additional typical satellite disturbances requires the use of an optimal control law; that is why we elaborated a dedicated Kalman filter. Simulations and experiments show a good rejection of disturbances. Performance of the bench should be enhanced by using a Kalman control law, and we should be able to reach the desired nanometric stability. Following, we will present the first results of the final polychromatic configuration, which includes an achromatic phase shifter, perturbators and optical delay lines. As a conclusion, we give the first more general lessons we have already learned from this experiment, both at system and component levels for a future space mission.

Paper Details

Date Published: 22 July 2010
PDF: 12 pages
Proc. SPIE 7734, Optical and Infrared Interferometry II, 77342M (22 July 2010); doi: 10.1117/12.856867
Show Author Affiliations
J. Lozi, ONERA (France)
Groupement d'Intérêt Scientifique PHASE (France)
F. Cassaing, ONERA (France)
Groupement d'Intérêt Scientifique PHASE (France)
J. M. Le Duigou, Ctr. National d'Études Spatiales (France)
K. Houairi, ONERA (France)
Groupement d'Intérêt Scientifique PHASE (France)
B. Sorrente, ONERA (France)
Groupement d'Intérêt Scientifique PHASE (France)
J. Montri, ONERA (France)
Groupement d'Intérêt Scientifique PHASE (France)
S. Jacquinod, Institut d'Astrophysique Spatiale d'Orsay (France)
J.-M. Rees, Observatoire de Paris à Meudon (France)
Groupement d'Intérêt Scientifique PHASE (France)
L. Pham, Observatoire de Paris à Meudon (France)
Groupement d'Intérêt Scientifique PHASE (France)
E. Lhome, Observatoire de Paris à Meudon (France)
Groupement d'Intérêt Scientifique PHASE (France)
T. Buey, Observatoire de Paris à Meudon (France)
Groupement d'Intérêt Scientifique PHASE (France)
F. Hénault, Observatoire de la Côte d'Azur (France)
A. Marcotto, Observatoire de la Côte d'Azur (France)
P. Girard, Observatoire de la Côte d'Azur (France)
N. Mauclert, Observatoire de la Côte d'Azur (France)
M. Barillot, Thales Alenia Space (France)
V. Coudé du Foresto, Observatoire de Paris à Meudon (France)
Groupement d'Intérêt Scientifique PHASE (France)
M. Ollivier, Institut d'Astrophysique Spatiale d'Orsay (France)


Published in SPIE Proceedings Vol. 7734:
Optical and Infrared Interferometry II
William C. Danchi; Françoise Delplancke; Jayadev K. Rajagopal, Editor(s)

© SPIE. Terms of Use
Back to Top