Spatial filtering in AMBER

Pierre Mege; Fabien Malbet; Alain Chelli

doi:10.1117/12.390198

5 July 2000 Spatial filtering in AMBER

Pierre Mege, Fabien Malbet, Alain Chelli

Proceedings Volume 4006, Interferometry in Optical Astronomy; (2000) https://doi.org/10.1117/12.390198
Event: Astronomical Telescopes and Instrumentation, 2000, Munich, Germany

Abstract

Optical fibers are now often used in long baseline interferometry because they offer spatial filtering which leads to better accuracy in presence of atmospheric turbulence. Although this property is now well-known and spatial filtering used at various interferometers (IOTA, PTI, ...) and planned for upcoming facilities (VLTI/AMBER, Keck), the underlying physics of spatial filtering is far from being understood. For example up to now, nobody has been able to theoretically predict in which conditions the use of spatial filters improves the quality of the measures. In this paper, we study the propagation of the light through different spatial filters (pinhole, step index fibers) and given preliminary theoretical prediction for the domain of superiority of spatial filtering. We show that for typical observations in the near-infrared with large telescopes corrected by a 64-actuators adaptive optics system, the spatial filtering always provide a better signal-to-noise ratio than the direct coupling of the light.

Citation Download Citation

Pierre Mege, Fabien Malbet, and Alain Chelli "Spatial filtering in AMBER", Proc. SPIE 4006, Interferometry in Optical Astronomy, (5 July 2000); https://doi.org/10.1117/12.390198

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