An optical fiber-based high contrast imager

Details An optical fiber-based high contrast imager An optical fiber-based high contrast imager

Sep 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011spie.8146e.275m&link_type=abstract

UV/Optical/IR Space Telescopes and Instruments: Innovative Technologies and Concepts V. Edited by Tsakalakos, Loucas. Proceedi

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Scientific paper

Arrays of single mode fibers can be used to form segmented pupils of almost arbitrary geometry. Such pupil arrays can be used both for interferometric imaging, for example by non-redundant aperture masking or in direct imaging systems such as the phased array coronagraph. Achieving control over the optical coupling, phase and dispersion for fiber arrays of reasonable size is a technological challenge. Progress has been made using a monolithic block of single mode fibers, lens arrays and masks, and mirror arrays. On one testbed, arrays of up to 37 beamlets are being combined to form a single image. On a second testbed, control of dispersion between fibers of slightly different length is being evaluated. The combination of the techniques being demonstrated has a range of potential uses in astronomy. In this paper we discuss the initial testbed results.

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