EAS Publications Series
Volume 8, 2003Astronomy with High Contrast Imaging
|Page(s)||311 - 318|
|Published online||28 May 2003|
Claude Aime and Rémi Soummer (eds)
EAS Publications Series, 8 (2003) 311-318
Multi-fiber Coupling for Wide Field Fiber Interferometry
Institute for Astronomy, 640 N. A'ohoku place, Hilo, HI 96720, USA
Adaptive Optics is now making it possible to efficiently use large telescopes in ground-based interferometers. Spatial filtering, especially with optical fibers, allows accurate interferometric measures to be done on these new interferometers (VLTI, Keck, OHANA). However, as telescope sizes increase and sensitivity improves, the problem of field of view of interferometers become more acute. In this paper, I focus on the observation of extended sources with fiber interferometers, and show that accurate visibility measurements are made difficult by the extent of the observed source. Out of the several solutions explored, one seems especially attractive: multi-fiber coupling. In this optical scheme, the pupil is subdivided in sub-pupils, each being coupled into a separate optical fiber. I show how this technique extends the field of view of fiber interferometers, reduces the errors in the interferometric measurements of extended sources, and provides flexibility which improves the sensitivity of fiber interferometers.
© EAS, EDP Sciences, 2003
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.