PERSEE: experimental results on the cophased nulling bench

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

doi:10.1117/12.856867

21 July 2010 PERSEE: experimental results on the cophased nulling bench

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

Author Affiliations +

Proceedings Volume 7734, Optical and Infrared Interferometry II; 77342M (2010) https://doi.org/10.1117/12.856867
Event: SPIE Astronomical Telescopes + Instrumentation, 2010, San Diego, California, United States

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.

Citation Download Citation

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, and M. Ollivier "PERSEE: experimental results on the cophased nulling bench", Proc. SPIE 7734, Optical and Infrared Interferometry II, 77342M (21 July 2010); https://doi.org/10.1117/12.856867

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available