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| Paper: |
Performance of the Cophasing System of Persee, a Dynamic Nulling Demonstrator |
| Volume: |
430, Pathways Towards Habitable Planets |
| Page: |
460 |
| Authors: |
Houairi, K.; Cassaing, F.; Duigou, J. M. L.; Amans, J. P.; Barillo, M.; Coudé du Foresto, V.; Hénault, F.; Jacquinod, S.; Lozi, J.; Montri, J.; Ollivier, M.; Reess, J. M.; Sorrente, B. |
| Abstract: |
Spectral characterization of exoplanets can be made by nulling interferometers. In this context, several projects have been proposed such as DARWIN/TPF-I, FKSI, PEGASE, and ALADDIN. To stabilize the beams with the required nanometric accuracy, a cophasing system is required, made of a piston/tip/tilt actuator on each arm and a piston/tip-tilt sensor. The demonstration of the feasibility of such a cophasing system is a central issue. In this goal, a laboratory breadboard named PERSEE is under integration at Observatoire de Paris-Meudon. This paper describes the current status of PERSEE. We show that a cophasing at a subnanometric level has been reached, which allowed us to reach a monochromatic null depth of N=6.2×10–5± 6.3×10–6. |
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